/* roulang page: index */
:root {
            --bg: #0A0F1E;
            --bg-soft: #0F172A;
            --surface: rgba(255, 255, 255, .04);
            --surface-hover: rgba(255, 255, 255, .08);
            --border: rgba(255, 255, 255, .12);
            --border-strong: rgba(255, 255, 255, .22);
            --text: #E8EDF7;
            --muted: #9DB1CC;
            --primary: #2563EB;
            --primary-bright: #3B82F6;
            --accent: #00D4FF;
            --accent-soft: rgba(0, 212, 255, .16);
            --danger: #F43F5E;
            --glow-blue: 0 0 22px rgba(59, 130, 246, .55);
            --glow-cyan: 0 0 18px rgba(0, 212, 255, .5);
            --radius-card: 18px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-icon: 12px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.85;
            font-size: 1rem;
            margin: 0;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--primary-bright);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 1rem;
            padding-right: 1rem;
            margin-left: auto;
            margin-right: auto;
        }
        @media (min-width: 768px) {
            .container {
                padding-left: 1.5rem;
                padding-right: 1.5rem;
            }
        }

        section {
            padding: 72px 0;
            position: relative;
        }
        @media (max-width: 576px) {
            section {
                padding: 48px 0;
            }
        }

        .section-label {
            display: inline-block;
            font-size: .78rem;
            letter-spacing: .06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: .6rem;
            font-weight: 600;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: .75rem;
            color: var(--text);
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
        }

        .glass {
            background: var(--surface);
            border: 1px solid var(--border);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: var(--radius-card);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
            padding: 1.25rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .2s;
        }
        .glass:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .4), var(--glow-cyan);
        }

        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: var(--primary-bright);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 600;
            box-shadow: var(--glow-blue);
            transition: box-shadow .3s, transform .2s, background .3s;
            text-decoration: none;
        }
        .btn-primary-glow:hover {
            box-shadow: var(--glow-cyan);
            transform: translateY(-1px);
            color: #fff;
            background: #2f6fe4;
        }
        .btn-primary-glow:active {
            transform: translateY(0);
            box-shadow: var(--glow-blue);
        }
        .btn-secondary-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: transparent;
            color: var(--text);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
            transition: border-color .3s, box-shadow .3s, transform .2s;
            text-decoration: none;
        }
        .btn-secondary-glass:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--text);
            transform: translateY(-1px);
        }
        .btn-ghost {
            background: transparent;
            border: none;
            color: var(--text);
            padding: .5rem 0;
            font-size: 1rem;
            transition: color .25s;
            text-align: left;
        }
        .btn-ghost:hover {
            color: var(--accent);
        }

        .badge-accent {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 999px;
            padding: .35em .8em;
            font-size: .75rem;
            font-weight: 500;
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .badge-glass {
            display: inline-block;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .3em .75em;
            font-size: .72rem;
            color: var(--muted);
            white-space: nowrap;
        }

        /* Header */
        .top-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 30, .82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: .7rem 0;
        }
        .top-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: .5rem;
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            letter-spacing: .02em;
        }
        .brand-logo:hover {
            color: var(--text);
        }
        .brand-logo .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-soft);
            border: 1px solid rgba(0, 212, 255, .35);
            color: var(--accent);
            border-radius: 8px;
            font-size: .8rem;
            padding: .15rem .5rem;
            font-weight: 600;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: .6rem;
        }
        .hamburger-btn {
            width: 44px;
            height: 44px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: none;
            gap: 5px;
            cursor: pointer;
            border-radius: 8px;
            transition: background .2s;
        }
        .hamburger-btn:hover {
            background: var(--surface-hover);
        }
        .hamburger-btn span {
            display: block;
            width: 24px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Drawer */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            z-index: 1040;
            background: rgba(0, 0, 0, .55);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            opacity: 0;
            pointer-events: none;
            transition: opacity .35s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-panel {
            position: fixed;
            top: 0;
            right: 0;
            height: 100vh;
            width: 100vw;
            max-width: 420px;
            background: rgba(15, 23, 42, .97);
            border-left: 1px solid var(--border-strong);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            z-index: 1050;
            transform: translateX(100%);
            transition: transform .38s cubic-bezier(.22, .61, .36, 1);
            display: flex;
            flex-direction: column;
            padding: 1rem 1.5rem 1.5rem;
        }
        .drawer-panel.open {
            transform: translateX(0);
        }
        @media (max-width: 576px) {
            .drawer-panel {
                max-width: 100vw;
            }
        }
        .drawer-close {
            align-self: flex-end;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 8px;
            color: var(--text);
            font-size: 1.2rem;
            cursor: pointer;
            transition: border-color .25s, color .25s;
        }
        .drawer-close:hover {
            border-color: var(--accent);
            color: var(--accent);
        }
        .drawer-nav {
            list-style: none;
            padding: 0;
            margin: 1.2rem 0 0;
            flex: 1;
            overflow-y: auto;
        }
        .drawer-nav li {
            margin-bottom: .2rem;
        }
        .drawer-nav a {
            display: block;
            padding: .7rem .3rem;
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--text);
            border-bottom: 1px solid var(--border);
            text-decoration: none;
            transition: color .25s, padding-left .25s;
        }
        .drawer-nav a:hover {
            color: var(--accent);
            padding-left: .7rem;
        }
        .drawer-nav .nav-desc {
            display: block;
            font-size: .78rem;
            color: var(--muted);
            font-weight: 400;
            margin-top: .1rem;
        }
        .drawer-footer {
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border);
            font-size: .8rem;
            color: var(--muted);
        }
        .drawer-footer .cta-wrap {
            margin-bottom: .6rem;
        }

        /* Hero */
        .hero-section {
            position: relative;
            min-height: 72vh;
            display: flex;
            align-items: center;
            padding: 4rem 0 5rem;
            overflow: hidden;
            background: var(--bg-soft);
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            z-index: 0;
        }
        .hero-bg img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: .38;
            filter: blur(1px);
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 15, 30, .72) 0%, rgba(10, 15, 30, .85) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 1;
            width: 100%;
        }
        .hero-title {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: .01em;
            margin-bottom: 1rem;
            color: #fff;
        }
        .hero-subtitle {
            font-size: 1.12rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
            margin-bottom: 1.25rem;
        }
        .hero-cta-wrap {
            display: flex;
            flex-wrap: wrap;
            gap: .8rem;
            margin-bottom: 2rem;
        }
        .hero-metrics {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
            margin-top: .5rem;
        }
        @media (max-width: 768px) {
            .hero-title {
                font-size: 1.75rem;
            }
            .hero-metrics {
                grid-template-columns: repeat(2, 1fr);
                gap: .8rem;
            }
        }
        .metric-card {
            padding: 1.1rem 1rem;
            text-align: left;
            display: flex;
            flex-direction: column;
            gap: .2rem;
        }
        .metric-card .metric-value {
            font-family: var(--font-mono);
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--accent);
            letter-spacing: .02em;
        }
        .metric-card .metric-unit {
            font-size: .8rem;
            color: var(--muted);
        }
        .metric-card .metric-label {
            font-size: .82rem;
            color: var(--muted);
            font-weight: 500;
        }
        .metric-card .metric-trend {
            font-size: .75rem;
            display: inline-flex;
            align-items: center;
            gap: .3rem;
        }
        .trend-up {
            color: var(--accent);
        }
        .trend-down {
            color: var(--danger);
        }

        /* Section dividers */
        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-strong), transparent);
            margin: 0;
            border: none;
        }

        /* Service matrix */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }
        @media (max-width: 992px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 576px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
        }
        .service-card {
            padding: 1.5rem 1.25rem;
            display: flex;
            flex-direction: column;
            gap: .6rem;
            height: 100%;
        }
        .service-card .icon-circle {
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-soft);
            border: 1px solid rgba(0, 212, 255, .3);
            border-radius: var(--radius-icon);
            color: var(--accent);
            font-size: 1.1rem;
        }
        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 650;
            margin: 0;
            color: var(--text);
        }
        .service-card p {
            font-size: .9rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.7;
        }
        .service-card a {
            font-size: .88rem;
            font-weight: 500;
            margin-top: auto;
        }

        /* Compare Section */
        .compare-wrap {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 1.5rem;
            align-items: start;
        }
        @media (max-width: 768px) {
            .compare-wrap {
                grid-template-columns: 1fr;
            }
        }
        .compare-table-card {
            padding: 1.5rem;
        }
        .compare-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: .6rem 0;
            border-bottom: 1px solid var(--border);
            font-size: .92rem;
        }
        .compare-row:last-child {
            border-bottom: none;
        }
        .compare-level {
            font-weight: 600;
            color: var(--text);
        }
        .compare-range {
            font-family: var(--font-mono);
            color: var(--accent);
            font-size: 1rem;
        }
        .compare-gap {
            font-size: .82rem;
            color: var(--muted);
        }
        .compare-conclusion {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .compare-conclusion li {
            padding: .5rem 0;
            font-size: .9rem;
            color: var(--muted);
            border-bottom: 1px solid var(--border);
        }
        .compare-conclusion li:last-child {
            border-bottom: none;
        }
        .compare-conclusion li strong {
            color: var(--text);
        }

        /* Timeline */
        .timeline-wrap {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        .timeline-item {
            position: relative;
            padding-left: 2.5rem;
            padding-bottom: 1.8rem;
            border-left: 2px solid var(--border-strong);
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -8px;
            top: .35rem;
            width: 14px;
            height: 14px;
            background: var(--primary-bright);
            border-radius: 50%;
            box-shadow: var(--glow-blue);
        }
        .timeline-item .timeline-year {
            font-family: var(--font-mono);
            font-weight: 700;
            color: var(--accent);
            font-size: .95rem;
        }
        .timeline-item .timeline-text {
            font-size: .9rem;
            color: var(--muted);
            margin-top: .2rem;
            line-height: 1.7;
        }

        /* News list */
        .news-layout {
            display: grid;
            grid-template-columns: 1.2fr .8fr;
            gap: 1.5rem;
        }
        @media (max-width: 768px) {
            .news-layout {
                grid-template-columns: 1fr;
            }
        }
        .news-main-card {
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .news-main-card img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: .8rem;
        }
        .news-main-card h3 {
            font-size: 1.2rem;
            font-weight: 650;
            margin: .3rem 0 .4rem;
            color: var(--text);
        }
        .news-main-card p {
            font-size: .9rem;
            color: var(--muted);
            margin: 0;
        }
        .news-side-list {
            display: flex;
            flex-direction: column;
            gap: .8rem;
        }
        .news-side-item {
            display: flex;
            gap: .8rem;
            padding: .7rem;
            border-radius: 12px;
            border: 1px solid var(--border);
            background: var(--surface);
            transition: background .3s, border-color .3s;
            text-decoration: none;
        }
        .news-side-item:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
        }
        .news-side-item img {
            width: 80px;
            height: 60px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .news-side-item .news-side-body {
            flex: 1;
            min-width: 0;
        }
        .news-side-item h4 {
            font-size: .9rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 .2rem;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-side-item p {
            font-size: .78rem;
            color: var(--muted);
            margin: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-more {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            margin-top: 1rem;
            font-size: .9rem;
            font-weight: 500;
        }

        /* Topic cards */
        .topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
        }
        @media (max-width: 768px) {
            .topic-grid {
                grid-template-columns: 1fr;
            }
        }
        .topic-card {
            overflow: hidden;
            display: flex;
            flex-direction: column;
        }
        .topic-card img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            border-radius: 10px;
            margin-bottom: .7rem;
        }
        .topic-card h3 {
            font-size: 1.05rem;
            font-weight: 650;
            margin: .2rem 0 .3rem;
            color: var(--text);
        }
        .topic-card p {
            font-size: .85rem;
            color: var(--muted);
            margin: 0 0 .5rem;
        }

        /* Assurance */
        .assurance-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }
        @media (max-width: 768px) {
            .assurance-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .assurance-grid {
                grid-template-columns: 1fr;
            }
        }
        .assurance-item {
            display: flex;
            flex-direction: column;
            gap: .4rem;
            padding: 1.2rem 1rem;
            text-align: left;
        }
        .assurance-item .icon-circle {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-soft);
            border-radius: var(--radius-icon);
            color: var(--accent);
            font-size: 1rem;
        }
        .assurance-item h3 {
            font-size: 1rem;
            font-weight: 600;
            margin: .2rem 0 0;
            color: var(--text);
        }
        .assurance-item p {
            font-size: .82rem;
            color: var(--muted);
            margin: 0;
        }

        /* Quick QA */
        .quick-qa-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }
        @media (max-width: 768px) {
            .quick-qa-grid {
                grid-template-columns: 1fr;
            }
        }
        .quick-qa-card {
            padding: 1.2rem 1.25rem;
        }
        .quick-qa-card h3 {
            font-size: .98rem;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 .4rem;
        }
        .quick-qa-card p {
            font-size: .88rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-wrap {
            max-width: 800px;
            margin: 0 auto;
        }
        .accordion-item {
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 12px !important;
            margin-bottom: .8rem;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: var(--text);
            font-size: .95rem;
            font-weight: 600;
            padding: 1rem 1.2rem;
            border: none;
            box-shadow: none;
            border-radius: 12px !important;
        }
        .accordion-button:not(.collapsed) {
            background: var(--surface);
            color: var(--accent);
            border-bottom: 1px solid var(--border-strong);
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--accent);
        }
        .accordion-button::after {
            filter: brightness(0) invert(1);
            opacity: .6;
        }
        .accordion-body {
            background: transparent;
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.8;
            padding: 1rem 1.2rem;
        }

        /* Form */
        .form-glass-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            align-items: center;
            padding: 1.75rem 1.5rem;
            border-color: rgba(0, 212, 255, .3);
        }
        @media (max-width: 768px) {
            .form-glass-card {
                grid-template-columns: 1fr;
            }
        }
        .form-text h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 .4rem;
        }
        .form-text p {
            font-size: .9rem;
            color: var(--muted);
            margin: 0;
        }
        .form-inline {
            display: flex;
            gap: .8rem;
            align-items: flex-end;
        }
        @media (max-width: 520px) {
            .form-inline {
                flex-direction: column;
                width: 100%;
            }
            .form-inline .btn-primary-glow {
                width: 100%;
            }
        }
        .form-inline label {
            font-size: .82rem;
            color: var(--muted);
            margin-bottom: .3rem;
            display: block;
        }
        .form-inline .input-wrap {
            flex: 1;
            min-width: 0;
        }
        .form-inline input {
            width: 100%;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-input);
            padding: .7rem 1rem;
            color: var(--text);
            font-size: .9rem;
            outline: none;
            transition: border-color .3s, box-shadow .3s;
        }
        .form-inline input::placeholder {
            color: var(--muted);
        }
        .form-inline input:focus {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
        }

        /* Data insight */
        .insight-card {
            position: relative;
            overflow: hidden;
            padding: 2rem 1.5rem;
            border-radius: var(--radius-card);
            border: 1px solid var(--border-strong);
            background: var(--bg-soft);
        }
        .insight-card img {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: .3;
            z-index: 0;
        }
        .insight-card::after {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(10, 15, 30, .7);
            z-index: 1;
        }
        .insight-card .insight-body {
            position: relative;
            z-index: 2;
        }
        .insight-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: #fff;
            margin: 0 0 .5rem;
        }
        .insight-card p {
            font-size: .92rem;
            color: var(--muted);
            margin: 0 0 .6rem;
            max-width: 60ch;
        }

        /* Editor picks */
        .editor-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }
        @media (max-width: 576px) {
            .editor-grid {
                grid-template-columns: 1fr;
            }
        }
        .editor-card {
            display: flex;
            gap: .8rem;
            padding: .9rem;
            align-items: flex-start;
        }
        .editor-card img {
            width: 90px;
            height: 70px;
            object-fit: cover;
            border-radius: 8px;
            flex-shrink: 0;
        }
        .editor-card .editor-body {
            flex: 1;
            min-width: 0;
        }
        .editor-card h3 {
            font-size: .95rem;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 .2rem;
        }
        .editor-card p {
            font-size: .8rem;
            color: var(--muted);
            margin: 0;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* Community */
        .community-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
        }
        @media (max-width: 768px) {
            .community-grid {
                grid-template-columns: 1fr;
            }
        }
        .community-card {
            padding: 1.2rem 1rem;
            text-align: left;
            display: flex;
            flex-direction: column;
            gap: .3rem;
        }
        .community-card .comm-icon {
            width: 38px;
            height: 38px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--accent-soft);
            border-radius: var(--radius-icon);
            color: var(--accent);
            font-size: .95rem;
        }
        .community-card h3 {
            font-size: 1rem;
            font-weight: 650;
            margin: .2rem 0 0;
            color: var(--text);
        }
        .community-card p {
            font-size: .82rem;
            color: var(--muted);
            margin: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding: 2.5rem 0 1.5rem;
            margin-top: 2rem;
        }
        .site-footer .container {
            max-width: 1320px;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: .4rem;
            display: inline-block;
        }
        .footer-desc {
            font-size: .85rem;
            color: var(--muted);
            max-width: 50ch;
            margin-bottom: 1rem;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-bottom: 1rem;
            padding: 0;
            list-style: none;
        }
        .footer-links a {
            font-size: .88rem;
            color: var(--muted);
            text-decoration: none;
            transition: color .25s;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-copy {
            font-size: .78rem;
            color: var(--muted);
            border-top: 1px solid var(--border);
            padding-top: 1rem;
            display: flex;
            flex-wrap: wrap;
            gap: .5rem 1.5rem;
            justify-content: space-between;
            align-items: center;
        }
        .footer-copy a {
            color: var(--muted);
            text-decoration: none;
        }
        .footer-copy a:hover {
            color: var(--accent);
        }

        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: .01ms !important;
                transition-duration: .01ms !important;
            }
        }

/* roulang page: category1 */
:root {
  --bg: #0A0F1E;
  --bg-soft: #0F172A;
  --surface: rgba(255, 255, 255, .04);
  --surface-hover: rgba(255, 255, 255, .08);
  --border: rgba(255, 255, 255, .12);
  --border-strong: rgba(255, 255, 255, .22);
  --text: #E8EDF7;
  --muted: #9DB1CC;
  --primary: #2563EB;
  --primary-bright: #3B82F6;
  --accent: #00D4FF;
  --accent-soft: rgba(0, 212, 255, .16);
  --danger: #F43F5E;
  --glow-blue: 0 0 22px rgba(59, 130, 246, .55);
  --glow-cyan: 0 0 18px rgba(0, 212, 255, .5);
  --radius-card: 18px;
  --radius-btn: 12px;
  --radius-input: 10px;
  --radius-icon: 12px;
  --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
}
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background-color: var(--bg);
  color: var(--text);
  line-height: 1.85;
  font-size: 1rem;
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: color .25s ease; }
a:hover { color: var(--primary-bright); }
a:focus-visible, button:focus-visible, input:focus-visible {
  outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px;
}
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; padding-left: 1.5rem; padding-right: 1.5rem; margin-left: auto; margin-right: auto; }
section { padding: 48px 0; position: relative; }
.section-label {
  display: inline-block; font-size: .78rem; letter-spacing: .06em; color: var(--accent);
  text-transform: uppercase; margin-bottom: .6rem; font-weight: 600;
}
.section-title { font-size: 1.75rem; font-weight: 700; line-height: 1.35; margin-bottom: .75rem; color: var(--text); }
.section-subtitle { font-size: 1rem; color: var(--muted); max-width: 72ch; line-height: 1.85; }

.btn-primary-glow {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  background: var(--primary-bright); color: #fff; border: none; border-radius: var(--radius-btn);
  padding: .72rem 1.5rem; font-size: .95rem; font-weight: 600; box-shadow: var(--glow-blue);
  transition: box-shadow .3s, transform .2s, background .3s; text-decoration: none;
}
.btn-primary-glow:hover { box-shadow: var(--glow-cyan); transform: translateY(-1px); color: #fff; background: #2f6fe4; }
.btn-primary-glow:active { transform: translateY(0); box-shadow: var(--glow-blue); }

.btn-secondary-glass {
  display: inline-flex; align-items: center; justify-content: center; gap: .5rem;
  background: transparent; color: var(--text); border: 1px solid var(--border-strong);
  border-radius: var(--radius-btn); padding: .72rem 1.5rem; font-size: .95rem; font-weight: 500;
  backdrop-filter: blur(10px); transition: border-color .3s, box-shadow .3s, transform .2s; text-decoration: none;
}
.btn-secondary-glass:hover { border-color: var(--accent); box-shadow: var(--glow-cyan); color: var(--text); transform: translateY(-1px); }

.btn-ghost { background: transparent; border: none; color: var(--text); padding: .5rem 0; font-size: 1rem; transition: color .25s; text-align: left; }
.btn-ghost:hover { color: var(--accent); }

.badge-accent {
  display: inline-block; background: var(--accent-soft); color: var(--accent);
  border: 1px solid rgba(0, 212, 255, .35); border-radius: 999px; padding: .35em .8em;
  font-size: .75rem; font-weight: 500; letter-spacing: .02em; white-space: nowrap;
}
.badge-glass {
  display: inline-block; background: var(--surface); border: 1px solid var(--border);
  border-radius: 999px; padding: .3em .75em; font-size: .72rem; color: var(--muted); white-space: nowrap;
}

/* Header */
.top-header {
  position: sticky; top: 0; z-index: 1030; background: rgba(10, 15, 30, .82);
  backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); padding: .7rem 0;
}
.top-header .container { display: flex; align-items: center; justify-content: space-between; max-width: 1320px; }
.brand-logo { display: inline-flex; align-items: center; gap: .5rem; color: var(--text); font-weight: 700; font-size: 1.3rem; text-decoration: none; }
.brand-logo:hover { color: var(--text); }
.logo-badge {
  display: inline-flex; align-items: center; justify-content: center; width: 34px; height: 34px;
  background: var(--primary-bright); color: #fff; border-radius: var(--radius-icon); font-size: .8rem;
  font-weight: 700; box-shadow: var(--glow-blue); font-family: var(--font-mono);
}
.header-actions { display: flex; align-items: center; gap: .75rem; }
.hamburger-btn {
  width: 44px; height: 44px; display: inline-flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 5px; background: transparent; border: 1px solid var(--border);
  border-radius: var(--radius-icon); cursor: pointer; transition: border-color .3s, box-shadow .3s;
}
.hamburger-btn span { display: block; width: 20px; height: 2px; background: var(--accent); transition: transform .3s, opacity .3s; }
.hamburger-btn:hover { border-color: var(--accent); box-shadow: var(--glow-cyan); }

/* Drawer Navigation */
.nav-overlay {
  position: fixed; inset: 0; z-index: 1040; background: rgba(0, 0, 0, .68);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); opacity: 0; visibility: hidden;
  transition: opacity .35s ease, visibility .35s ease;
}
.nav-overlay.open { opacity: 1; visibility: visible; }
.nav-panel {
  position: absolute; top: 0; right: 0; width: 100vw; max-width: 420px; height: 100%;
  background: rgba(10, 15, 30, .94); backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-left: 1px solid var(--border); padding: 2rem 2rem 1.5rem; display: flex; flex-direction: column;
  transform: translateX(100%); transition: transform .35s cubic-bezier(.4, 0, .2, 1);
}
.nav-overlay.open .nav-panel { transform: translateX(0); }
.nav-close {
  position: absolute; top: 1rem; right: 1rem; width: 44px; height: 44px; display: flex;
  align-items: center; justify-content: center; background: transparent; border: 1px solid var(--border);
  border-radius: var(--radius-icon); color: var(--muted); font-size: 1.3rem; cursor: pointer;
  transition: border-color .3s, color .3s, box-shadow .3s;
}
.nav-close:hover { border-color: var(--accent); color: var(--accent); box-shadow: var(--glow-cyan); }
.nav-content { flex: 1; overflow-y: auto; margin-top: 2rem; }
.nav-link {
  display: block; padding: .85rem 0; color: var(--text); font-size: 1.15rem; font-weight: 600;
  border-bottom: 1px solid var(--border); transition: color .25s, padding-left .25s; text-decoration: none;
}
.nav-link:hover { color: var(--accent); padding-left: .5rem; }
.nav-link.active { color: var(--accent); border-bottom-color: rgba(0, 212, 255, .4); }
.nav-desc { display: block; font-size: .8rem; font-weight: 400; color: var(--muted); margin-top: .15rem; }
.nav-footer { padding-top: 1.5rem; border-top: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; font-size: .85rem; color: var(--muted); }
.nav-footer a { color: var(--muted); }
.nav-footer a:hover { color: var(--accent); }
body.drawer-open { overflow: hidden; }

/* Breadcrumb */
.breadcrumb-wrapper { padding: 1.5rem 0 0; }
.breadcrumb-custom { display: flex; align-items: center; flex-wrap: wrap; gap: .5rem; font-size: .88rem; color: var(--muted); list-style: none; padding: 0; margin: 0; }
.breadcrumb-custom li { display: flex; align-items: center; gap: .5rem; }
.breadcrumb-custom li a { color: var(--muted); text-decoration: none; transition: color .25s; }
.breadcrumb-custom li a:hover { color: var(--accent); }
.breadcrumb-custom li.current { color: var(--text); font-weight: 600; }
.breadcrumb-separator { color: var(--border-strong); font-weight: 300; }

/* Category Hero */
.category-hero { padding: 2.5rem 0 2rem; position: relative; }
.category-hero h1 { font-size: 2.25rem; font-weight: 700; color: var(--text); margin-bottom: .5rem; letter-spacing: -.01em; }
.category-hero .category-lead { font-size: 1.05rem; color: var(--muted); max-width: 65ch; line-height: 1.8; }

/* Filter Tags */
.filter-tags-section { padding: .5rem 0 1.5rem; }
.filter-tags { display: flex; flex-wrap: wrap; gap: .6rem; }
.filter-tag {
  background: var(--surface); border: 1px solid var(--border); border-radius: 999px;
  padding: .45rem 1rem; font-size: .82rem; color: var(--muted); cursor: pointer; white-space: nowrap;
  transition: background .3s, color .3s, border-color .3s, box-shadow .3s;
}
.filter-tag:hover { background: var(--surface-hover); border-color: var(--border-strong); color: var(--text); }
.filter-tag.active {
  background: var(--accent-soft); border-color: rgba(0, 212, 255, .45); color: var(--accent);
  box-shadow: 0 0 12px rgba(0, 212, 255, .25);
}

/* Article List */
.article-list-section { padding-top: 1.5rem; }
.article-card {
  display: flex; flex-direction: column; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-card); overflow: hidden; height: 100%; transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
  text-decoration: none; color: var(--text);
}
.article-card:hover { background: var(--surface-hover); border-color: var(--border-strong); box-shadow: var(--glow-cyan); transform: translateY(-2px); color: var(--text); }
.article-card .article-img { width: 100%; height: 190px; object-fit: cover; border-radius: 0; }
.article-card .article-body { padding: 1.25rem; display: flex; flex-direction: column; flex: 1; }
.article-card .article-title { font-size: 1.05rem; font-weight: 600; line-height: 1.5; margin-bottom: .5rem; color: var(--text); }
.article-card .article-summary { font-size: .88rem; color: var(--muted); line-height: 1.7; margin-bottom: .75rem; }
.article-card .article-meta { display: flex; flex-wrap: wrap; gap: .75rem; font-size: .75rem; color: var(--muted); margin-top: auto; }
.article-card .article-meta span { display: inline-flex; align-items: center; gap: .25rem; }

/* Recommend */
.recommend-section { padding: 2.5rem 0; }
.recommend-card {
  display: flex; align-items: center; gap: 1rem; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-card); padding: 1rem; text-decoration: none; color: var(--text);
  transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
}
.recommend-card:hover { background: var(--surface-hover); border-color: var(--border-strong); box-shadow: var(--glow-cyan); transform: translateY(-2px); color: var(--text); }
.recommend-card img { width: 100px; height: 70px; object-fit: cover; border-radius: 10px; flex-shrink: 0; }
.recommend-card .rc-title { font-size: .95rem; font-weight: 600; line-height: 1.5; }
.recommend-card .rc-meta { font-size: .75rem; color: var(--muted); }

/* Hot Topics */
.hot-topics-section { padding: 2rem 0; }
.hot-topic-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card);
  padding: 1.25rem; text-align: center; transition: background .3s, border-color .3s, box-shadow .3s;
}
.hot-topic-card:hover { background: var(--surface-hover); border-color: var(--border-strong); box-shadow: var(--glow-cyan); }
.hot-topic-card .topic-tag { font-size: .82rem; color: var(--accent); font-weight: 600; margin-bottom: .5rem; }
.hot-topic-card .topic-title { font-size: .95rem; color: var(--text); font-weight: 500; }

/* Subscribe Strip */
.subscribe-strip {
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1.5rem;
  background: rgba(0, 212, 255, .08); border: 1px solid rgba(0, 212, 255, .3); border-radius: var(--radius-card);
  padding: 1.5rem 2rem; margin-top: 2rem;
}
.subscribe-strip p { margin: 0; color: var(--text); font-size: .98rem; }
.subscribe-strip .sub-highlight { color: var(--accent); font-weight: 600; }

/* Section Divider */
.section-divider { border-top: 1px solid var(--border); margin: 0 0 2rem; }

/* FAQ Simple */
.faq-simple-section { padding: 2rem 0; }
.faq-simple-item { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 1.25rem 1.5rem; margin-bottom: 1rem; transition: background .3s, border-color .3s, box-shadow .3s; }
.faq-simple-item:hover { background: var(--surface-hover); border-color: var(--border-strong); box-shadow: var(--glow-cyan); }
.faq-simple-item .faq-q { font-weight: 600; color: var(--text); font-size: .95rem; margin-bottom: .5rem; }
.faq-simple-item .faq-a { color: var(--muted); font-size: .88rem; line-height: 1.8; }
.faq-simple-item .faq-a p { margin: 0; }

/* Pagination */
.pagination-wrapper { padding: 2rem 0 1rem; }
.pagination-custom { display: flex; align-items: center; gap: .4rem; list-style: none; padding: 0; margin: 0; }
.pagination-custom li { display: inline-flex; }
.pagination-custom .page-link {
  display: inline-flex; align-items: center; justify-content: center; min-width: 40px; height: 40px;
  padding: 0 .75rem; border-radius: 10px; font-size: .88rem; font-weight: 500;
  background: var(--surface); border: 1px solid var(--border); color: var(--muted);
  transition: background .3s, border-color .3s, color .3s, box-shadow .3s; text-decoration: none;
}
.pagination-custom .page-link:hover { background: var(--surface-hover); border-color: var(--border-strong); color: var(--text); }
.pagination-custom .page-link.active { background: var(--primary-bright); border-color: var(--primary-bright); color: #fff; box-shadow: var(--glow-blue); }
.pagination-custom .page-link.disabled { opacity: .4; pointer-events: none; }

/* Related Categories */
.related-cats-section { padding: 2rem 0 0; }
.related-cat-card {
  display: block; text-align: center; padding: 1.5rem 1rem; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--radius-card); text-decoration: none;
  transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
}
.related-cat-card:hover { background: var(--surface-hover); border-color: var(--border-strong); box-shadow: var(--glow-cyan); transform: translateY(-2px); }
.related-cat-card .rc-icon { font-size: 1.5rem; color: var(--accent); margin-bottom: .5rem; }
.related-cat-card .rc-name { font-size: 1rem; font-weight: 600; color: var(--text); }
.related-cat-card .rc-desc { font-size: .78rem; color: var(--muted); margin-top: .25rem; }

/* Footer */
.site-footer { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 3rem 0 2rem; margin-top: 3rem; }
.site-footer .container { max-width: 1320px; }
.footer-brand { display: inline-flex; align-items: center; gap: .5rem; font-size: 1.3rem; font-weight: 700; color: var(--text); text-decoration: none; margin-bottom: .75rem; }
.footer-brand:hover { color: var(--text); }
.footer-desc { color: var(--muted); font-size: .9rem; max-width: 55ch; line-height: 1.8; margin-bottom: 1.5rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.25rem 2rem; list-style: none; padding: 0; margin: 0 0 1.5rem; }
.footer-links a { color: var(--muted); text-decoration: none; transition: color .25s; }
.footer-links a:hover { color: var(--accent); }
.footer-copy { display: flex; flex-wrap: wrap; gap: .75rem 1.5rem; font-size: .78rem; color: var(--muted); border-top: 1px solid var(--border); padding-top: 1.5rem; }
.footer-copy a { color: var(--muted); text-decoration: none; }
.footer-copy a:hover { color: var(--accent); }

/* Responsive */
@media (max-width: 991.98px) {
  .article-card .article-img { height: 160px; }
  .subscribe-strip { flex-direction: column; text-align: center; padding: 1.25rem; }
  .category-hero h1 { font-size: 1.75rem; }
}
@media (max-width: 767.98px) {
  .article-card .article-img { height: 180px; }
  .recommend-card img { width: 80px; height: 56px; }
  .footer-links { gap: .75rem 1.25rem; }
  .filter-tags { gap: .4rem; }
  .filter-tag { padding: .35rem .8rem; font-size: .75rem; }
}
@media (max-width: 575.98px) {
  .article-card .article-img { height: 160px; }
  .category-hero h1 { font-size: 1.5rem; }
  .pagination-custom .page-link { min-width: 36px; height: 36px; font-size: .8rem; }
  .recommend-card { flex-direction: row; align-items: flex-start; }
  .recommend-card img { width: 70px; height: 50px; }
}
@media (max-width: 520px) {
  .container { padding-left: 1rem; padding-right: 1rem; }
  section { padding: 36px 0; }
  .nav-panel { width: 100vw; max-width: 100vw; }
}
@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
}

/* roulang page: category2 */
:root {
            --bg: #0A0F1E;
            --bg-soft: #0F172A;
            --surface: rgba(255, 255, 255, .04);
            --surface-hover: rgba(255, 255, 255, .08);
            --border: rgba(255, 255, 255, .12);
            --border-strong: rgba(255, 255, 255, .22);
            --text: #E8EDF7;
            --muted: #9DB1CC;
            --primary: #2563EB;
            --primary-bright: #3B82F6;
            --accent: #00D4FF;
            --accent-soft: rgba(0, 212, 255, .16);
            --danger: #F43F5E;
            --glow-blue: 0 0 22px rgba(59, 130, 246, .55);
            --glow-cyan: 0 0 18px rgba(0, 212, 255, .5);
            --radius-card: 18px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-icon: 12px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.85;
            font-size: 1rem;
            margin: 0;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--primary-bright);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }
        section {
            padding: 72px 0;
            position: relative;
        }
        @media (max-width: 767.98px) {
            section {
                padding: 48px 0;
            }
        }
        .section-label {
            display: inline-block;
            font-size: .78rem;
            letter-spacing: .06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: .6rem;
            font-weight: 600;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: .75rem;
            color: var(--text);
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
        }
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: var(--primary-bright);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 600;
            box-shadow: var(--glow-blue);
            transition: box-shadow .3s, transform .2s, background .3s;
            text-decoration: none;
            cursor: pointer;
        }
        .btn-primary-glow:hover {
            box-shadow: var(--glow-cyan);
            transform: translateY(-1px);
            color: #fff;
            background: #2f6fe4;
        }
        .btn-primary-glow:active {
            transform: translateY(0);
            box-shadow: var(--glow-blue);
        }
        .btn-secondary-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: transparent;
            color: var(--text);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: border-color .3s, box-shadow .3s, transform .2s;
            text-decoration: none;
        }
        .btn-secondary-glass:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--text);
            transform: translateY(-1px);
        }
        .badge-accent {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 999px;
            padding: .35em .8em;
            font-size: .75rem;
            font-weight: 500;
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .badge-glass {
            display: inline-block;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .3em .75em;
            font-size: .72rem;
            color: var(--muted);
            white-space: nowrap;
        }
        .glass-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
            padding: 1.5rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
        }
        .glass-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35), var(--glow-cyan);
            transform: translateY(-2px);
        }
        /* Header */
        .top-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 30, .82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: .7rem 0;
        }
        .top-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: .5rem;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text);
            letter-spacing: .02em;
        }
        .brand-logo .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            background: linear-gradient(135deg, var(--primary-bright), var(--accent));
            color: #fff;
            font-size: .85rem;
            font-weight: 700;
            border-radius: 8px;
            box-shadow: var(--glow-blue);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: .75rem;
        }
        .hamburger-btn {
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            cursor: pointer;
            transition: border-color .3s, box-shadow .3s;
        }
        .hamburger-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }
        .hamburger-btn[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* Drawer */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .62);
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
            z-index: 1040;
            opacity: 0;
            visibility: hidden;
            transition: opacity .35s ease, visibility .35s ease;
        }
        .side-drawer {
            position: fixed;
            top: 0;
            right: 0;
            height: 100vh;
            width: 420px;
            max-width: 100vw;
            background: rgba(15, 23, 42, .96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-left: 1px solid var(--border-strong);
            z-index: 1045;
            padding: 2rem 1.75rem 1.5rem;
            transform: translateX(100%);
            transition: transform .4s cubic-bezier(.4, 0, .2, 1);
            overflow-y: auto;
            display: flex;
            flex-direction: column;
        }
        body.drawer-open {
            overflow: hidden;
        }
        body.drawer-open .drawer-overlay {
            opacity: 1;
            visibility: visible;
        }
        body.drawer-open .side-drawer {
            transform: translateX(0);
        }
        .drawer-close-btn {
            align-self: flex-end;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--muted);
            cursor: pointer;
            font-size: 1.2rem;
            transition: border-color .3s, color .3s, transform .3s;
            margin-bottom: 1.5rem;
        }
        .drawer-close-btn:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: rotate(90deg);
        }
        .drawer-nav {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: .25rem;
        }
        .drawer-nav li a {
            display: flex;
            flex-direction: column;
            gap: .1rem;
            padding: .85rem .5rem;
            color: var(--text);
            font-size: 1.15rem;
            font-weight: 600;
            border-radius: 10px;
            transition: background .3s, color .3s, padding-left .3s;
        }
        .drawer-nav li a:hover,
        .drawer-nav li a.active {
            color: var(--accent);
            background: var(--surface-hover);
            padding-left: 1rem;
        }
        .drawer-nav li a small {
            font-size: .8rem;
            font-weight: 400;
            color: var(--muted);
        }
        .drawer-nav li a.active small {
            color: var(--accent);
        }
        .drawer-footer {
            margin-top: auto;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border);
        }
        .drawer-footer .social-row {
            display: flex;
            gap: .65rem;
            margin-top: 1rem;
        }
        .drawer-footer .social-row a {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            border: 1px solid var(--border);
            color: var(--muted);
            transition: border-color .3s, color .3s, box-shadow .3s;
        }
        .drawer-footer .social-row a:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .drawer-footer .drawer-brand-note {
            font-size: .8rem;
            color: var(--muted);
            line-height: 1.6;
        }
        /* Hero */
        .category-hero {
            position: relative;
            min-height: 620px;
            display: flex;
            align-items: flex-end;
            overflow: hidden;
            padding: 5rem 0 4rem;
        }
        .category-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/5663ab65fab60c72.webp');
            background-size: cover;
            background-position: center 30%;
            z-index: 0;
        }
        .category-hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10,15,30,.72) 0%, rgba(10,15,30,.88) 58%, rgba(10,15,30,.96) 100%);
            z-index: 1;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .hero-tag-strip {
            display: flex;
            flex-wrap: wrap;
            gap: .6rem;
            margin-bottom: 1.5rem;
        }
        .hero-tag-strip .badge-accent {
            font-size: .82rem;
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 700;
            line-height: 1.2;
            color: #fff;
            margin-bottom: 1rem;
            letter-spacing: .01em;
        }
        .category-hero .hero-lead {
            font-size: 1.12rem;
            color: var(--text);
            max-width: 60ch;
            line-height: 1.9;
            margin-bottom: 1.75rem;
        }
        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        @media (max-width: 991.98px) {
            .category-hero {
                min-height: 520px;
            }
            .category-hero h1 {
                font-size: 2.3rem;
            }
        }
        @media (max-width: 575.98px) {
            .category-hero {
                min-height: 440px;
                padding: 3.5rem 0 3rem;
            }
            .category-hero h1 {
                font-size: 1.85rem;
            }
            .category-hero .hero-lead {
                font-size: 1rem;
            }
        }
        /* Breadcrumb */
        .breadcrumb-section {
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border);
            background: var(--bg-soft);
        }
        .breadcrumb-section .container {
            max-width: 1200px;
        }
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .5rem;
            list-style: none;
            padding: 0;
            margin: 0;
            font-size: .88rem;
        }
        .breadcrumb-custom li {
            display: flex;
            align-items: center;
            gap: .5rem;
            color: var(--muted);
        }
        .breadcrumb-custom li + li::before {
            content: "/";
            color: var(--muted);
            opacity: .6;
            margin-right: .25rem;
        }
        .breadcrumb-custom a {
            color: var(--muted);
            transition: color .25s;
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-custom .current {
            color: var(--text);
            font-weight: 500;
        }
        /* Filter tags */
        .filter-section {
            padding: 1.75rem 0 .5rem;
        }
        .filter-row {
            display: flex;
            flex-wrap: wrap;
            gap: .65rem;
        }
        .filter-tag-btn {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .45rem 1.1rem;
            font-size: .85rem;
            color: var(--muted);
            cursor: pointer;
            transition: border-color .3s, color .3s, box-shadow .3s, background .3s;
        }
        .filter-tag-btn:hover {
            border-color: var(--accent);
            color: var(--text);
            box-shadow: var(--glow-cyan);
        }
        .filter-tag-btn.active {
            background: var(--primary-bright);
            color: #fff;
            border-color: var(--primary-bright);
            box-shadow: var(--glow-blue);
        }
        /* List cards left text right image */
        .track-list-section {
            padding-top: 2rem;
        }
        .track-list-card {
            display: grid;
            grid-template-columns: 1fr 260px;
            gap: 1.5rem;
            align-items: stretch;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: 0 6px 20px rgba(0,0,0,.28);
            padding: 1.35rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
            margin-bottom: 1.25rem;
        }
        .track-list-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: 0 10px 30px rgba(0,0,0,.38), var(--glow-cyan);
            transform: translateY(-2px);
        }
        .track-list-content {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            min-width: 0;
        }
        .track-list-title {
            font-size: 1.2rem;
            font-weight: 650;
            line-height: 1.4;
            color: var(--text);
            margin-bottom: .5rem;
            transition: color .25s;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .track-list-card:hover .track-list-title {
            color: var(--accent);
        }
        .track-list-summary {
            font-size: .93rem;
            color: var(--muted);
            line-height: 1.75;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: .75rem;
        }
        .track-list-meta {
            display: flex;
            flex-wrap: wrap;
            gap: .8rem;
            font-size: .78rem;
            color: var(--muted);
        }
        .track-list-meta span {
            display: inline-flex;
            align-items: center;
            gap: .3rem;
        }
        .track-list-img {
            width: 100%;
            height: 100%;
            min-height: 160px;
            border-radius: 12px;
            overflow: hidden;
        }
        .track-list-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .track-list-card:hover .track-list-img img {
            transform: scale(1.04);
        }
        @media (max-width: 767.98px) {
            .track-list-card {
                grid-template-columns: 1fr;
            }
            .track-list-img {
                min-height: 200px;
                order: -1;
            }
        }
        /* Recommended */
        .recommended-section {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1rem;
        }
        .recommend-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.15rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
            display: block;
            text-decoration: none;
        }
        .recommend-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
        }
        .recommend-card h3 {
            font-size: .98rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.45;
            margin: .5rem 0 .35rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .recommend-card p {
            font-size: .82rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .recommend-card .badge-accent {
            font-size: .7rem;
        }
        @media (max-width: 991.98px) {
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 575.98px) {
            .recommend-grid {
                grid-template-columns: 1fr;
            }
        }
        /* Hot topics */
        .hot-topics-section {
            padding: 3rem 0;
        }
        .hot-topics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
        }
        .hot-topic-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.2rem;
            transition: border-color .3s, box-shadow .3s, transform .25s;
        }
        .hot-topic-card:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
        }
        .hot-topic-card i {
            color: var(--accent);
            font-size: 1.2rem;
            margin-bottom: .75rem;
        }
        .hot-topic-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: .35rem;
        }
        .hot-topic-card p {
            font-size: .85rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.65;
        }
        @media (max-width: 767.98px) {
            .hot-topics-grid {
                grid-template-columns: 1fr;
            }
        }
        /* Subscribe strip */
        .subscribe-strip {
            padding: 2.5rem 0;
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .subscribe-strip .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .subscribe-strip .strip-text {
            font-size: 1.05rem;
            font-weight: 500;
            color: var(--text);
            max-width: 60ch;
        }
        @media (max-width: 575.98px) {
            .subscribe-strip .container {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        /* FAQ */
        .faq-section {
            padding: 3.5rem 0;
        }
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1.25rem;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.35rem 1.5rem;
            transition: border-color .3s, box-shadow .3s;
        }
        .faq-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .faq-question {
            font-size: 1.05rem;
            font-weight: 650;
            color: var(--text);
            margin-bottom: .6rem;
            display: flex;
            align-items: flex-start;
            gap: .65rem;
        }
        .faq-question .faq-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 24px;
            height: 24px;
            min-width: 24px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: .72rem;
            font-weight: 700;
        }
        .faq-answer {
            font-size: .95rem;
            color: var(--muted);
            line-height: 1.85;
            margin: 0;
            padding-left: 2rem;
        }
        @media (max-width: 575.98px) {
            .faq-item {
                padding: 1.1rem;
            }
            .faq-answer {
                padding-left: 0;
            }
        }
        /* Pagination */
        .pagination-section {
            padding: 2rem 0 3.5rem;
        }
        .pagination-custom {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .4rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .pagination-custom .page-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--muted);
            font-size: .9rem;
            transition: border-color .3s, color .3s, box-shadow .3s, background .3s;
            text-decoration: none;
        }
        .pagination-custom .page-btn:hover {
            border-color: var(--accent);
            color: var(--text);
            box-shadow: var(--glow-cyan);
        }
        .pagination-custom .page-btn.active {
            background: var(--primary-bright);
            border-color: var(--primary-bright);
            color: #fff;
            box-shadow: var(--glow-blue);
        }
        .pagination-custom .page-btn.disabled {
            opacity: .4;
            pointer-events: none;
            cursor: default;
        }
        /* Related circle */
        .related-section {
            padding: 3rem 0 4rem;
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }
        .related-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.2rem;
            text-decoration: none;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
        }
        .related-card:hover {
            background: var(--surface-hover);
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
        }
        .related-card i {
            font-size: 1.5rem;
            color: var(--accent);
            min-width: 40px;
            text-align: center;
        }
        .related-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text);
            margin-bottom: .2rem;
        }
        .related-card p {
            font-size: .82rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.5;
        }
        @media (max-width: 767.98px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        /* Footer */
        .site-footer {
            background: #080C19;
            border-top: 1px solid var(--border);
            padding: 3.5rem 0 2rem;
        }
        .site-footer .container {
            max-width: 1320px;
        }
        .footer-brand {
            display: inline-block;
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: .75rem;
        }
        .footer-desc {
            font-size: .95rem;
            color: var(--muted);
            max-width: 65ch;
            line-height: 1.8;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: .75rem 1.25rem;
        }
        .footer-links li a {
            color: var(--muted);
            font-size: .9rem;
            transition: color .25s;
        }
        .footer-links li a:hover {
            color: var(--accent);
        }
        .footer-copy {
            display: flex;
            flex-wrap: wrap;
            gap: .75rem 1.5rem;
            font-size: .8rem;
            color: var(--muted);
            border-top: 1px solid var(--border);
            padding-top: 1.25rem;
        }
        .footer-copy a {
            color: var(--muted);
            transition: color .25s;
        }
        .footer-copy a:hover {
            color: var(--accent);
        }
        @media (max-width: 767.98px) {
            .footer-copy {
                flex-direction: column;
                gap: .5rem;
            }
        }
        /* Additional */
        .divider-sep {
            height: 1px;
            background: var(--border);
            margin: 0;
            border: none;
        }
        @media (prefers-reduced-motion: reduce) {
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category3 */
:root {
            --bg: #0A0F1E;
            --bg-soft: #0F172A;
            --surface: rgba(255, 255, 255, .04);
            --surface-hover: rgba(255, 255, 255, .08);
            --border: rgba(255, 255, 255, .12);
            --border-strong: rgba(255, 255, 255, .22);
            --text: #E8EDF7;
            --muted: #9DB1CC;
            --primary: #2563EB;
            --primary-bright: #3B82F6;
            --accent: #00D4FF;
            --accent-soft: rgba(0, 212, 255, .16);
            --danger: #F43F5E;
            --glow-blue: 0 0 22px rgba(59, 130, 246, .55);
            --glow-cyan: 0 0 18px rgba(0, 212, 255, .5);
            --radius-card: 18px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-icon: 12px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
        }

        html {
            scroll-behavior: smooth;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.85;
            font-size: 1rem;
            margin: 0;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .25s ease, border-color .25s ease, box-shadow .25s ease;
        }
        a:hover {
            color: var(--primary-bright);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }

        section {
            padding: 56px 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-size: .78rem;
            letter-spacing: .06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: .6rem;
            font-weight: 600;
        }

        .section-title {
            font-size: 1.65rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: .75rem;
            color: var(--text);
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
        }

        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: var(--primary-bright);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 600;
            box-shadow: var(--glow-blue);
            transition: box-shadow .3s, transform .2s, background .3s;
            text-decoration: none;
            cursor: pointer;
        }
        .btn-primary-glow:hover {
            box-shadow: var(--glow-cyan);
            transform: translateY(-1px);
            color: #fff;
            background: #2f6fe4;
        }
        .btn-primary-glow:active {
            transform: translateY(0);
            box-shadow: var(--glow-blue);
        }

        .btn-secondary-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: transparent;
            color: var(--text);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: border-color .3s, box-shadow .3s, transform .2s;
            text-decoration: none;
            cursor: pointer;
        }
        .btn-secondary-glass:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--text);
            transform: translateY(-1px);
        }

        .btn-ghost {
            background: transparent;
            border: none;
            color: var(--text);
            padding: .5rem 0;
            font-size: 1rem;
            transition: color .25s;
            text-align: left;
            cursor: pointer;
        }
        .btn-ghost:hover {
            color: var(--accent);
        }

        .badge-accent {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 999px;
            padding: .35em .8em;
            font-size: .75rem;
            font-weight: 500;
            letter-spacing: .02em;
            white-space: nowrap;
        }

        .badge-glass {
            display: inline-block;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .3em .75em;
            font-size: .72rem;
            color: var(--muted);
            white-space: nowrap;
        }

        /* Header */
        .top-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 30, .82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: .7rem 0;
        }
        .top-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: .5rem;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            letter-spacing: .02em;
        }
        .brand-logo:hover {
            color: var(--text);
        }
        .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent-soft);
            color: var(--accent);
            border-radius: 8px;
            font-size: .85rem;
            font-weight: 700;
            border: 1px solid rgba(0, 212, 255, .35);
            flex-shrink: 0;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: .75rem;
        }
        .hamburger-btn {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            cursor: pointer;
            transition: border-color .25s ease, box-shadow .25s ease;
            flex-shrink: 0;
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }
        .hamburger-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
        }

        /* Drawer */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            z-index: 1040;
            background: rgba(0, 0, 0, .55);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            opacity: 0;
            pointer-events: none;
            transition: opacity .35s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-panel {
            position: fixed;
            top: 0;
            right: 0;
            bottom: 0;
            z-index: 1050;
            width: 100vw;
            max-width: 420px;
            background: rgba(15, 23, 42, .96);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-left: 1px solid var(--border);
            padding: 1.25rem 1.5rem 1.5rem;
            transform: translateX(100%);
            transition: transform .4s cubic-bezier(.22, 1, .36, 1);
            overflow-y: auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .drawer-panel.open {
            transform: translateX(0);
        }
        .drawer-top {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border);
        }
        .drawer-brand {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text);
        }
        .drawer-close {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--text);
            font-size: 1.2rem;
            cursor: pointer;
            transition: border-color .25s, color .25s, transform .25s;
        }
        .drawer-close:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: rotate(90deg);
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: .25rem;
            flex: 1;
        }
        .drawer-nav-link {
            display: flex;
            align-items: baseline;
            justify-content: space-between;
            padding: .8rem .5rem;
            border-radius: 10px;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            transition: background .25s, color .25s;
            text-decoration: none;
            border-bottom: 1px solid transparent;
        }
        .drawer-nav-link:hover {
            background: var(--surface-hover);
            color: var(--accent);
        }
        .drawer-nav-link.active {
            color: var(--accent);
            border-bottom-color: rgba(0, 212, 255, .3);
        }
        .drawer-nav-desc {
            font-size: .78rem;
            font-weight: 400;
            color: var(--muted);
        }
        .drawer-bottom {
            border-top: 1px solid var(--border);
            padding-top: 1rem;
            display: flex;
            flex-direction: column;
            gap: .75rem;
        }
        .drawer-social {
            display: flex;
            gap: .75rem;
            align-items: center;
        }
        .drawer-social a {
            width: 36px;
            height: 36px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: 1px solid var(--border);
            border-radius: 50%;
            color: var(--muted);
            transition: color .25s, border-color .25s;
            font-size: .9rem;
        }
        .drawer-social a:hover {
            color: var(--accent);
            border-color: var(--accent);
        }
        .drawer-copyright {
            font-size: .72rem;
            color: var(--muted);
        }

        /* Page header */
        .page-header {
            padding: 48px 0 28px;
            border-bottom: 1px solid var(--border);
            background: linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
        }
        .page-header h1 {
            font-size: 2.3rem;
            font-weight: 700;
            margin-bottom: .6rem;
            color: var(--text);
            line-height: 1.3;
        }
        .page-header .page-lead {
            color: var(--muted);
            font-size: 1.05rem;
            max-width: 72ch;
            line-height: 1.85;
        }

        /* Breadcrumb */
        .breadcrumb-custom {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .35rem;
            font-size: .85rem;
            color: var(--muted);
            padding: .4rem 0;
            margin-bottom: 0;
            list-style: none;
        }
        .breadcrumb-custom li {
            display: flex;
            align-items: center;
            gap: .35rem;
        }
        .breadcrumb-custom li + li::before {
            content: "/";
            color: var(--border-strong);
            font-size: .85rem;
        }
        .breadcrumb-custom a {
            color: var(--muted);
            transition: color .25s;
        }
        .breadcrumb-custom a:hover {
            color: var(--accent);
        }
        .breadcrumb-custom .current {
            color: var(--text);
            font-weight: 500;
        }

        /* Tag filter */
        .tag-filter {
            display: flex;
            flex-wrap: wrap;
            gap: .6rem;
            padding: 0;
            list-style: none;
            margin-bottom: 0;
        }
        .tag-filter .tag-btn {
            display: inline-flex;
            align-items: center;
            gap: .3rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .4rem 1rem;
            font-size: .82rem;
            color: var(--muted);
            cursor: pointer;
            transition: border-color .25s, box-shadow .25s, background .25s, color .25s;
            white-space: nowrap;
            user-select: none;
        }
        .tag-filter .tag-btn:hover {
            border-color: var(--accent);
            color: var(--text);
        }
        .tag-filter .tag-btn.active {
            background: var(--primary-bright);
            color: #fff;
            border-color: var(--primary-bright);
            box-shadow: var(--glow-blue);
        }

        /* Article cards */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }
        .article-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
            display: flex;
            flex-direction: column;
            text-decoration: none;
            color: var(--text);
        }
        .article-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            transform: translateY(-3px);
            color: var(--text);
        }
        .article-card-img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            background: var(--bg-soft);
        }
        .article-card-body {
            padding: 1.25rem;
            display: flex;
            flex-direction: column;
            gap: .6rem;
            flex: 1;
        }
        .article-card-title {
            font-size: 1.05rem;
            font-weight: 650;
            line-height: 1.45;
            margin: 0;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color .25s;
        }
        .article-card:hover .article-card-title {
            color: var(--accent);
        }
        .article-card-summary {
            font-size: .88rem;
            color: var(--muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }
        .article-card-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: .5rem;
            font-size: .75rem;
            color: var(--muted);
            margin-top: auto;
        }
        .article-card-meta .dot {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--border-strong);
            display: inline-block;
        }

        /* Recommendation cards */
        .rec-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }
        .rec-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1rem;
            display: flex;
            gap: 1rem;
            align-items: center;
            transition: background .3s, border-color .3s, box-shadow .3s;
            text-decoration: none;
            color: var(--text);
        }
        .rec-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            color: var(--text);
        }
        .rec-card img {
            width: 88px;
            height: 62px;
            object-fit: cover;
            border-radius: 10px;
            flex-shrink: 0;
        }
        .rec-card-info h4 {
            font-size: .95rem;
            font-weight: 600;
            margin: 0 0 .35rem;
            line-height: 1.4;
        }
        .rec-card-info p {
            font-size: .8rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.5;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Hot topics */
        .topic-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: .6rem;
        }
        .topic-cloud .topic-pill {
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 999px;
            padding: .5rem 1.2rem;
            font-size: .85rem;
            font-weight: 500;
            transition: background .25s, box-shadow .25s;
            text-decoration: none;
        }
        .topic-cloud .topic-pill:hover {
            background: var(--surface-hover);
            box-shadow: var(--glow-cyan);
            color: var(--accent);
        }

        /* Subscribe strip */
        .subscribe-strip {
            background: var(--surface);
            border: 1px solid rgba(0, 212, 255, .25);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.75rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
            box-shadow: var(--glow-cyan);
        }
        .subscribe-strip h3 {
            font-size: 1.15rem;
            font-weight: 650;
            margin: 0 0 .3rem;
        }
        .subscribe-strip p {
            font-size: .88rem;
            color: var(--muted);
            margin: 0;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: .6rem;
        }
        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 1rem 1.25rem;
            transition: border-color .3s, box-shadow .3s;
        }
        .faq-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .faq-item .faq-q {
            font-weight: 600;
            font-size: .95rem;
            margin-bottom: .5rem;
            color: var(--text);
            display: flex;
            align-items: baseline;
            gap: .5rem;
        }
        .faq-item .faq-q .faq-num {
            color: var(--accent);
            font-weight: 700;
            font-size: .9rem;
            flex-shrink: 0;
        }
        .faq-item .faq-a {
            font-size: .9rem;
            color: var(--muted);
            line-height: 1.8;
            margin: 0;
            padding-left: 1.4rem;
        }

        /* Pagination */
        .pagination-custom {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .45rem;
            flex-wrap: wrap;
        }
        .pagination-custom .page-link-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: .9rem;
            font-weight: 500;
            transition: border-color .25s, box-shadow .25s, background .25s;
            text-decoration: none;
        }
        .pagination-custom .page-link-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--text);
        }
        .pagination-custom .page-link-btn.active {
            background: var(--primary-bright);
            border-color: var(--primary-bright);
            box-shadow: var(--glow-blue);
            color: #fff;
            cursor: default;
        }
        .pagination-custom .page-link-btn.disabled {
            opacity: .4;
            pointer-events: none;
            cursor: not-allowed;
        }

        /* Related categories */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
        }
        .related-cat-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.25rem;
            display: flex;
            align-items: center;
            gap: .8rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
            text-decoration: none;
            color: var(--text);
        }
        .related-cat-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            transform: translateY(-3px);
            color: var(--text);
        }
        .related-cat-card .icon-box {
            width: 42px;
            height: 42px;
            border-radius: var(--radius-icon);
            background: var(--accent-soft);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .related-cat-card h5 {
            font-size: .95rem;
            font-weight: 600;
            margin: 0 0 .2rem;
        }
        .related-cat-card p {
            font-size: .78rem;
            color: var(--muted);
            margin: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding: 48px 0 32px;
            margin-top: 48px;
        }
        .site-footer .container {
            max-width: 1320px;
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .footer-brand {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: .5rem;
        }
        .footer-brand:hover {
            color: var(--text);
        }
        .footer-desc {
            font-size: .9rem;
            color: var(--muted);
            max-width: 56ch;
            line-height: 1.75;
            margin: 0;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: .35rem 1.25rem;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links a {
            font-size: .88rem;
            color: var(--muted);
            transition: color .25s;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-copy {
            display: flex;
            flex-wrap: wrap;
            gap: .4rem 1.25rem;
            font-size: .78rem;
            color: var(--muted);
            padding-top: 1rem;
            border-top: 1px solid var(--border);
        }
        .footer-copy a {
            color: var(--muted);
            transition: color .25s;
        }
        .footer-copy a:hover {
            color: var(--accent);
        }

        /* Section divider */
        .section-divider {
            border: 0;
            height: 1px;
            background: var(--border);
            margin: 0;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .article-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .rec-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .drawer-panel {
                max-width: 100vw;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 40px 0;
            }
            .page-header {
                padding: 32px 0 20px;
            }
            .page-header h1 {
                font-size: 1.75rem;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
            .rec-grid {
                grid-template-columns: 1fr;
            }
            .subscribe-strip {
                flex-direction: column;
                align-items: flex-start;
            }
            .subscribe-strip .btn-primary-glow {
                width: 100%;
            }
            .footer-copy {
                flex-direction: column;
                gap: .35rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .brand-logo {
                font-size: 1.1rem;
            }
            .logo-badge {
                width: 28px;
                height: 28px;
                font-size: .75rem;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .page-header h1 {
                font-size: 1.5rem;
            }
            .tag-filter .tag-btn {
                font-size: .75rem;
                padding: .35rem .8rem;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *,
            *::before,
            *::after {
                animation-duration: 0.01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: 0.01ms !important;
            }
        }

/* roulang page: category4 */
:root {
            --bg: #0A0F1E;
            --bg-soft: #0F172A;
            --surface: rgba(255, 255, 255, .04);
            --surface-hover: rgba(255, 255, 255, .08);
            --border: rgba(255, 255, 255, .12);
            --border-strong: rgba(255, 255, 255, .22);
            --text: #E8EDF7;
            --muted: #9DB1CC;
            --primary: #2563EB;
            --primary-bright: #3B82F6;
            --accent: #00D4FF;
            --accent-soft: rgba(0, 212, 255, .16);
            --danger: #F43F5E;
            --glow-blue: 0 0 22px rgba(59, 130, 246, .55);
            --glow-cyan: 0 0 18px rgba(0, 212, 255, .5);
            --radius-card: 18px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-icon: 12px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.85;
            font-size: 1rem;
            margin: 0;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--primary-bright);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }
        section {
            padding: 56px 0;
            position: relative;
        }
        .section-label {
            display: inline-block;
            font-size: .78rem;
            letter-spacing: .06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: .6rem;
            font-weight: 600;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: .75rem;
            color: var(--text);
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
        }
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: var(--primary-bright);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 600;
            box-shadow: var(--glow-blue);
            transition: box-shadow .3s, transform .2s, background .3s;
            text-decoration: none;
        }
        .btn-primary-glow:hover {
            box-shadow: var(--glow-cyan);
            transform: translateY(-1px);
            color: #fff;
            background: #2f6fe4;
        }
        .btn-primary-glow:active {
            transform: translateY(0);
            box-shadow: var(--glow-blue);
        }
        .btn-secondary-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: transparent;
            color: var(--text);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
            transition: border-color .3s, box-shadow .3s, transform .2s;
            text-decoration: none;
        }
        .btn-secondary-glass:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--text);
            transform: translateY(-1px);
        }
        .btn-ghost {
            background: transparent;
            border: none;
            color: var(--text);
            padding: .5rem 0;
            font-size: 1rem;
            transition: color .25s;
            text-align: left;
        }
        .btn-ghost:hover {
            color: var(--accent);
        }
        .badge-accent {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 999px;
            padding: .35em .8em;
            font-size: .75rem;
            font-weight: 500;
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .badge-glass {
            display: inline-block;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .3em .75em;
            font-size: .72rem;
            color: var(--muted);
            white-space: nowrap;
        }
        .glass-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
            padding: 1.25rem;
        }
        .glass-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
        }
        .top-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 30, .82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: .7rem 0;
        }
        .top-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            letter-spacing: .01em;
        }
        .brand-logo:hover {
            color: var(--text);
        }
        .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 8px;
            background: var(--primary-bright);
            color: #fff;
            font-size: .85rem;
            font-weight: 700;
            box-shadow: var(--glow-blue);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .hamburger-btn {
            width: 44px;
            height: 44px;
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            cursor: pointer;
            transition: border-color .3s, box-shadow .3s;
        }
        .hamburger-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }
        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .62);
            backdrop-filter: blur(6px);
            -webkit-backdrop-filter: blur(6px);
            z-index: 1040;
            opacity: 0;
            visibility: hidden;
            transition: opacity .35s ease, visibility .35s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }
        .drawer-panel {
            position: fixed;
            top: 0;
            right: 0;
            height: 100vh;
            width: 420px;
            max-width: 100vw;
            background: rgba(15, 23, 42, .96);
            backdrop-filter: blur(22px);
            -webkit-backdrop-filter: blur(22px);
            border-left: 1px solid var(--border);
            z-index: 1041;
            transform: translateX(100%);
            transition: transform .4s cubic-bezier(.22, .8, .32, 1);
            display: flex;
            flex-direction: column;
            padding: 1.5rem;
        }
        .drawer-panel.open {
            transform: translateX(0);
        }
        .drawer-close {
            position: absolute;
            top: 1rem;
            right: 1rem;
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: transparent;
            color: var(--text);
            font-size: 1.1rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: border-color .3s, transform .3s, color .3s;
        }
        .drawer-close:hover {
            border-color: var(--accent);
            color: var(--accent);
            transform: rotate(90deg);
        }
        .drawer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 1.5rem;
        }
        .drawer-nav-list {
            list-style: none;
            padding: 0;
            margin: 0;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: .3rem;
        }
        .drawer-nav-list li a {
            display: flex;
            flex-direction: column;
            padding: .6rem .5rem;
            border-radius: 10px;
            border: 1px solid transparent;
            transition: background .3s, border-color .3s;
            color: var(--text);
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
        }
        .drawer-nav-list li a span.nav-desc {
            font-size: .82rem;
            color: var(--muted);
            font-weight: 400;
            margin-top: .1rem;
        }
        .drawer-nav-list li a:hover {
            background: var(--surface);
            border-color: var(--border);
            color: var(--accent);
        }
        .drawer-nav-list li a.active {
            border-color: var(--accent);
            background: var(--accent-soft);
            color: var(--accent);
        }
        .drawer-bottom {
            margin-top: 1rem;
            padding-top: 1rem;
            border-top: 1px solid var(--border);
        }
        .drawer-bottom .btn-primary-glow {
            width: 100%;
            margin-bottom: .5rem;
        }
        .drawer-social {
            display: flex;
            gap: .8rem;
            font-size: 1.1rem;
            color: var(--muted);
        }
        .drawer-social a {
            color: var(--muted);
            transition: color .25s;
        }
        .drawer-social a:hover {
            color: var(--accent);
        }
        .drawer-note {
            font-size: .78rem;
            color: var(--muted);
            margin-top: .6rem;
            line-height: 1.6;
        }
        .page-hero {
            padding: 64px 0 40px;
            position: relative;
            background: radial-gradient(ellipse at 30% 20%, rgba(37, 99, 235, .16), transparent 55%), radial-gradient(ellipse at 80% 60%, rgba(0, 212, 255, .08), transparent 50%);
        }
        .page-hero .container {
            position: relative;
            z-index: 1;
        }
        .page-hero h1 {
            font-size: 2.4rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: .8rem;
            letter-spacing: .01em;
        }
        .page-hero .lead {
            font-size: 1.15rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
        }
        .breadcrumb-28 {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .5rem;
            font-size: .88rem;
            color: var(--muted);
            list-style: none;
            padding: 0;
            margin: 0 0 1rem;
        }
        .breadcrumb-28 li {
            display: flex;
            align-items: center;
            gap: .5rem;
        }
        .breadcrumb-28 li+li::before {
            content: "/";
            color: var(--border-strong);
            margin-right: .5rem;
        }
        .breadcrumb-28 a {
            color: var(--accent);
            text-decoration: none;
            transition: color .25s;
        }
        .breadcrumb-28 a:hover {
            color: var(--primary-bright);
        }
        .breadcrumb-28 .current {
            color: var(--text);
            font-weight: 500;
        }
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: .6rem;
            margin: 1.5rem 0 2rem;
        }
        .tag-btn {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .42rem 1.1rem;
            font-size: .82rem;
            color: var(--muted);
            cursor: pointer;
            transition: background .3s, border-color .3s, color .3s, box-shadow .3s;
            white-space: nowrap;
        }
        .tag-btn:hover {
            border-color: var(--accent);
            color: var(--text);
            box-shadow: var(--glow-cyan);
        }
        .tag-btn.active {
            background: var(--primary-bright);
            border-color: var(--primary-bright);
            color: #fff;
            box-shadow: var(--glow-blue);
        }
        .gear-card-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.5rem;
        }
        .gear-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
            display: flex;
            flex-direction: column;
        }
        .gear-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
        }
        .gear-card .card-img {
            height: 200px;
            overflow: hidden;
            border-radius: 12px 12px 0 0;
        }
        .gear-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .gear-card:hover .card-img img {
            transform: scale(1.04);
        }
        .gear-card .card-body {
            padding: 1.25rem 1.5rem 1.5rem;
            display: flex;
            flex-direction: column;
            gap: .6rem;
            flex: 1;
        }
        .gear-card .card-title {
            font-size: 1.1rem;
            font-weight: 650;
            color: var(--text);
            line-height: 1.4;
            margin: 0;
        }
        .gear-card .card-title a {
            color: var(--text);
            text-decoration: none;
            transition: color .25s;
        }
        .gear-card .card-title a:hover {
            color: var(--accent);
        }
        .gear-card .card-desc {
            font-size: .92rem;
            color: var(--muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin: 0;
        }
        .gear-card .card-meta {
            display: flex;
            align-items: center;
            gap: .8rem;
            font-size: .78rem;
            color: var(--muted);
            margin-top: auto;
            padding-top: .3rem;
            flex-wrap: wrap;
        }
        .gear-card .card-meta i {
            color: var(--accent);
            font-size: .72rem;
        }
        .recommend-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }
        .recommend-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
        }
        .recommend-card:hover {
            background: var(--surface-hover);
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
        }
        .recommend-card .rec-img {
            height: 110px;
            border-radius: 10px;
            overflow: hidden;
            margin-bottom: .8rem;
        }
        .recommend-card .rec-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .recommend-card h3 {
            font-size: .95rem;
            font-weight: 600;
            color: var(--text);
            margin: 0 0 .4rem;
            line-height: 1.4;
        }
        .recommend-card h3 a {
            color: var(--text);
            text-decoration: none;
            transition: color .25s;
        }
        .recommend-card h3 a:hover {
            color: var(--accent);
        }
        .recommend-card p {
            font-size: .82rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.6;
        }
        .hot-topic-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
        }
        .hot-topic-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.2rem 1.4rem;
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            transition: background .3s, border-color .3s, transform .25s;
        }
        .hot-topic-card:hover {
            background: var(--surface-hover);
            border-color: var(--accent);
            transform: translateY(-2px);
        }
        .hot-topic-card .topic-icon {
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: var(--accent-soft);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        .hot-topic-card h3 {
            font-size: 1rem;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 .3rem;
        }
        .hot-topic-card p {
            font-size: .85rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.6;
        }
        .subscribe-strip {
            background: rgba(37, 99, 235, .08);
            border: 1px solid rgba(0, 212, 255, .25);
            border-radius: var(--radius-card);
            padding: 1.8rem 2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
        }
        .subscribe-strip .sub-text h3 {
            font-size: 1.15rem;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 .3rem;
        }
        .subscribe-strip .sub-text p {
            font-size: .88rem;
            color: var(--muted);
            margin: 0;
        }
        .faq-basic-list {
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }
        .faq-basic-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.2rem 1.5rem;
            transition: border-color .3s, background .3s;
        }
        .faq-basic-item:hover {
            border-color: var(--border-strong);
            background: var(--surface-hover);
        }
        .faq-basic-item h3 {
            font-size: .98rem;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 .5rem;
            display: flex;
            align-items: center;
            gap: .5rem;
        }
        .faq-basic-item h3 .faq-num {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: .72rem;
            font-weight: 600;
            flex-shrink: 0;
        }
        .faq-basic-item p {
            font-size: .9rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.75;
        }
        .pagination-28 {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            flex-wrap: wrap;
            margin-top: 2.5rem;
        }
        .pagination-28 a,
        .pagination-28 span.page-dots {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 .6rem;
            border-radius: 10px;
            font-size: .88rem;
            font-weight: 500;
            text-decoration: none;
            transition: background .3s, border-color .3s, box-shadow .3s, color .3s;
            border: 1px solid var(--border);
            background: var(--surface);
            color: var(--text);
        }
        .pagination-28 a:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--accent);
        }
        .pagination-28 .current {
            background: var(--primary-bright);
            border-color: var(--primary-bright);
            color: #fff;
            box-shadow: var(--glow-blue);
        }
        .pagination-28 .disabled {
            opacity: .4;
            cursor: default;
            pointer-events: none;
        }
        .related-circle-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.2rem;
        }
        .related-circle-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1.4rem 1.5rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .25s;
            display: flex;
            align-items: center;
            gap: 1rem;
            text-decoration: none;
            color: var(--text);
        }
        .related-circle-card:hover {
            background: var(--surface-hover);
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
            color: var(--text);
        }
        .related-circle-card .rc-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--accent-soft);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.3rem;
            flex-shrink: 0;
        }
        .related-circle-card h3 {
            font-size: 1rem;
            font-weight: 650;
            color: var(--text);
            margin: 0 0 .2rem;
        }
        .related-circle-card p {
            font-size: .82rem;
            color: var(--muted);
            margin: 0;
        }
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding: 3rem 0 2rem;
            margin-top: 0;
        }
        .site-footer .container {
            max-width: 1320px;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            display: inline-block;
            margin-bottom: .6rem;
        }
        .footer-brand:hover {
            color: var(--text);
        }
        .footer-desc {
            font-size: .88rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.75;
            margin-bottom: 1.5rem;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 1.2rem;
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem;
        }
        .footer-links a {
            color: var(--muted);
            font-size: .88rem;
            text-decoration: none;
            transition: color .25s;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-copy {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem 1.5rem;
            align-items: center;
            font-size: .78rem;
            color: var(--muted);
            border-top: 1px solid var(--border);
            padding-top: 1.2rem;
        }
        .footer-copy a {
            color: var(--muted);
            text-decoration: none;
            transition: color .25s;
        }
        .footer-copy a:hover {
            color: var(--accent);
        }
        .data-28 {
            font-family: var(--font-mono);
            font-weight: 700;
            color: var(--accent);
        }
        @media (max-width: 991px) {
            .recommend-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hot-topic-row {
                grid-template-columns: 1fr;
            }
            .related-circle-row {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 767px) {
            section {
                padding: 40px 0;
            }
            .gear-card-grid {
                grid-template-columns: 1fr;
            }
            .page-hero h1 {
                font-size: 1.85rem;
            }
            .recommend-grid {
                grid-template-columns: 1fr;
            }
            .subscribe-strip {
                flex-direction: column;
                align-items: flex-start;
                padding: 1.5rem;
            }
            .drawer-panel {
                width: 100vw;
            }
            .footer-copy {
                flex-direction: column;
                align-items: flex-start;
                gap: .4rem;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .header-actions .btn-secondary-glass {
                display: none;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .filter-tags {
                gap: .4rem;
            }
            .tag-btn {
                padding: .32rem .8rem;
                font-size: .75rem;
            }
            .gear-card .card-img {
                height: 160px;
            }
            .pagination-28 a,
            .pagination-28 span.page-dots {
                min-width: 34px;
                height: 34px;
                font-size: .78rem;
            }
        }

/* roulang page: category5 */
:root {
            --bg: #0A0F1E;
            --bg-soft: #0F172A;
            --surface: rgba(255, 255, 255, .04);
            --surface-hover: rgba(255, 255, 255, .08);
            --border: rgba(255, 255, 255, .12);
            --border-strong: rgba(255, 255, 255, .22);
            --text: #E8EDF7;
            --muted: #9DB1CC;
            --primary: #2563EB;
            --primary-bright: #3B82F6;
            --accent: #00D4FF;
            --accent-soft: rgba(0, 212, 255, .16);
            --danger: #F43F5E;
            --glow-blue: 0 0 22px rgba(59, 130, 246, .55);
            --glow-cyan: 0 0 18px rgba(0, 212, 255, .5);
            --radius-card: 18px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-icon: 12px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.85;
            font-size: 1rem;
            margin: 0;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--primary-bright);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }
        section {
            padding: 72px 0;
            position: relative;
        }
        @media (max-width: 575.98px) {
            section {
                padding: 48px 0;
            }
        }
        .section-label {
            display: inline-block;
            font-size: .78rem;
            letter-spacing: .06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: .6rem;
            font-weight: 600;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: .75rem;
            color: var(--text);
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
        }
        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: var(--primary-bright);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 600;
            box-shadow: var(--glow-blue);
            transition: box-shadow .3s, transform .2s, background .3s;
            text-decoration: none;
        }
        .btn-primary-glow:hover {
            box-shadow: var(--glow-cyan);
            transform: translateY(-1px);
            color: #fff;
            background: #2f6fe4;
        }
        .btn-primary-glow:active {
            transform: translateY(0);
            box-shadow: var(--glow-blue);
        }
        .btn-secondary-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: transparent;
            color: var(--text);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            transition: border-color .3s, box-shadow .3s, transform .2s;
            text-decoration: none;
        }
        .btn-secondary-glass:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--text);
            transform: translateY(-1px);
        }
        .btn-ghost {
            background: transparent;
            border: none;
            color: var(--text);
            padding: .5rem 0;
            font-size: 1rem;
            transition: color .25s;
            text-align: left;
        }
        .btn-ghost:hover {
            color: var(--accent);
        }
        .glass-card {
            background: var(--surface);
            border: 1px solid var(--border);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: var(--radius-card);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
            padding: 1.5rem;
            transition: background .3s ease, border-color .3s ease, box-shadow .3s ease, transform .3s ease;
        }
        .glass-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .badge-accent {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 999px;
            padding: .35em .8em;
            font-size: .75rem;
            font-weight: 500;
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .badge-glass {
            display: inline-block;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .3em .75em;
            font-size: .72rem;
            color: var(--muted);
            white-space: nowrap;
        }
        /* Header */
        .top-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 30, .82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: .7rem 0;
        }
        .top-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
        }
        .brand-logo {
            font-size: 1.35rem;
            font-weight: 700;
            color: var(--text);
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            text-decoration: none;
        }
        .brand-logo:hover {
            color: var(--accent);
        }
        .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-bright);
            color: #fff;
            font-size: .72rem;
            font-weight: 700;
            width: 30px;
            height: 30px;
            border-radius: 8px;
            box-shadow: var(--glow-blue);
            font-family: var(--font-mono);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .hamburger-btn {
            display: inline-flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            cursor: pointer;
            transition: border-color .3s, box-shadow .3s;
        }
        .hamburger-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .hamburger-btn span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform .3s ease, opacity .3s ease;
        }
        .hamburger-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        /* Drawer */
        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100vw;
            height: 100vh;
            background: rgba(0, 0, 0, .55);
            backdrop-filter: blur(8px);
            -webkit-backdrop-filter: blur(8px);
            z-index: 1040;
            opacity: 0;
            visibility: hidden;
            transition: opacity .35s ease, visibility .35s ease;
        }
        .drawer-overlay.open {
            opacity: 1;
            visibility: visible;
        }
        .drawer-panel {
            position: fixed;
            top: 0;
            right: 0;
            height: 100vh;
            width: 420px;
            max-width: 100vw;
            background: rgba(10, 15, 30, .95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-left: 1px solid var(--border-strong);
            z-index: 1041;
            transform: translateX(100%);
            transition: transform .38s cubic-bezier(.4, 0, .2, 1);
            display: flex;
            flex-direction: column;
            padding: 1.5rem 2rem;
            overflow-y: auto;
        }
        .drawer-panel.open {
            transform: translateX(0);
        }
        .drawer-panel .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border);
            margin-bottom: 1.5rem;
        }
        .drawer-panel .drawer-header .drawer-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text);
        }
        .drawer-close-btn {
            width: 40px;
            height: 40px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--text);
            cursor: pointer;
            font-size: 1.25rem;
            transition: border-color .3s, box-shadow .3s, transform .3s;
        }
        .drawer-close-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            transform: rotate(90deg);
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: .4rem;
            flex: 1;
        }
        .drawer-nav .drawer-nav-link {
            display: block;
            padding: .8rem 1rem;
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text);
            text-decoration: none;
            border-radius: 10px;
            transition: background .3s, color .3s, transform .3s;
            opacity: 0;
            transform: translateX(20px);
        }
        .drawer-panel.open .drawer-nav .drawer-nav-link {
            opacity: 1;
            transform: translateX(0);
        }
        .drawer-panel.open .drawer-nav .drawer-nav-link:nth-child(1) {
            transition-delay: .08s;
        }
        .drawer-panel.open .drawer-nav .drawer-nav-link:nth-child(2) {
            transition-delay: .14s;
        }
        .drawer-panel.open .drawer-nav .drawer-nav-link:nth-child(3) {
            transition-delay: .2s;
        }
        .drawer-panel.open .drawer-nav .drawer-nav-link:nth-child(4) {
            transition-delay: .26s;
        }
        .drawer-panel.open .drawer-nav .drawer-nav-link:nth-child(5) {
            transition-delay: .32s;
        }
        .drawer-panel.open .drawer-nav .drawer-nav-link:nth-child(6) {
            transition-delay: .38s;
        }
        .drawer-nav .drawer-nav-link:hover {
            background: var(--surface-hover);
            color: var(--accent);
        }
        .drawer-nav .drawer-nav-link.active {
            color: var(--accent);
            background: var(--accent-soft);
            border-left: 3px solid var(--accent);
        }
        .drawer-nav .drawer-nav-desc {
            font-size: .78rem;
            color: var(--muted);
            padding-left: 1rem;
            margin-top: -0.3rem;
            margin-bottom: .6rem;
            font-weight: 400;
        }
        .drawer-footer {
            padding-top: 1rem;
            border-top: 1px solid var(--border);
            margin-top: 1rem;
            display: flex;
            flex-direction: column;
            gap: .5rem;
        }
        .drawer-footer .drawer-brand-note {
            font-size: .8rem;
            color: var(--muted);
        }
        .drawer-footer .drawer-social-row {
            display: flex;
            gap: .75rem;
        }
        .drawer-footer .drawer-social-row a {
            color: var(--muted);
            font-size: 1.1rem;
            transition: color .3s;
        }
        .drawer-footer .drawer-social-row a:hover {
            color: var(--accent);
        }
        /* Breadcrumb */
        .breadcrumb-training {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .3rem;
            list-style: none;
            padding: 0;
            margin: 0;
            font-size: .85rem;
        }
        .breadcrumb-training li {
            display: inline-flex;
            align-items: center;
            color: var(--muted);
        }
        .breadcrumb-training li+li::before {
            content: "/";
            margin: 0 .5rem;
            color: var(--border-strong);
        }
        .breadcrumb-training a {
            color: var(--muted);
            transition: color .3s;
        }
        .breadcrumb-training a:hover {
            color: var(--accent);
        }
        .breadcrumb-training li[aria-current="page"] {
            color: var(--text);
            font-weight: 500;
        }
        /* Filter tags */
        .filter-tags {
            display: flex;
            flex-wrap: wrap;
            gap: .5rem;
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .filter-tags .tag-filter {
            display: inline-flex;
            align-items: center;
            padding: .45rem 1rem;
            font-size: .82rem;
            font-weight: 500;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            color: var(--muted);
            cursor: pointer;
            transition: background .3s, border-color .3s, color .3s, box-shadow .3s, transform .2s;
            user-select: none;
            -webkit-user-select: none;
            white-space: nowrap;
        }
        .filter-tags .tag-filter:hover {
            border-color: var(--accent);
            color: var(--text);
            box-shadow: var(--glow-cyan);
        }
        .filter-tags .tag-filter.active {
            background: var(--primary-bright);
            border-color: var(--primary-bright);
            color: #fff;
            box-shadow: var(--glow-blue);
            font-weight: 600;
        }
        /* Article cards */
        .article-card {
            display: flex;
            flex-direction: column;
            background: var(--surface);
            border: 1px solid var(--border);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-radius: var(--radius-card);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
            overflow: hidden;
            transition: background .3s ease, border-color .3s ease, box-shadow .3s ease, transform .3s ease;
            height: 100%;
        }
        .article-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            transform: translateY(-3px);
        }
        .article-card .article-thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            border-radius: 0;
        }
        .article-card .article-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .article-card:hover .article-thumb img {
            transform: scale(1.05);
        }
        .article-card .article-body {
            padding: 1.25rem 1.5rem 1.5rem;
            display: flex;
            flex-direction: column;
            flex: 1;
        }
        .article-card .article-title {
            font-size: 1.05rem;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: .5rem;
            color: var(--text);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color .3s;
        }
        .article-card:hover .article-title {
            color: var(--accent);
        }
        .article-card .article-meta {
            font-size: .78rem;
            color: var(--muted);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .75rem;
            margin-bottom: .6rem;
        }
        .article-card .article-meta span {
            display: inline-flex;
            align-items: center;
            gap: .25rem;
        }
        .article-card .article-excerpt {
            font-size: .88rem;
            color: var(--muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: .75rem;
        }
        .article-card .article-link {
            font-size: .85rem;
            font-weight: 600;
            color: var(--accent);
            display: inline-flex;
            align-items: center;
            gap: .35rem;
            margin-top: auto;
            transition: color .3s;
        }
        .article-card .article-link:hover {
            color: var(--primary-bright);
        }
        .article-card .article-link i {
            font-size: .75rem;
        }
        /* Recommend cards */
        .recommend-card {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1rem 1.25rem;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: background .3s, border-color .3s, box-shadow .3s;
            height: 100%;
        }
        .recommend-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .recommend-card .reco-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            background: var(--accent-soft);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: var(--radius-icon);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1rem;
        }
        .recommend-card .reco-title {
            font-size: .95rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: .25rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .recommend-card .reco-meta {
            font-size: .75rem;
            color: var(--muted);
        }
        .recommend-card a {
            text-decoration: none;
            flex: 1;
        }
        /* Hot topics */
        .hot-topic-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            padding: 1rem 1.25rem;
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            transition: background .3s, border-color .3s, box-shadow .3s;
            height: 100%;
            display: flex;
            align-items: center;
            gap: .75rem;
        }
        .hot-topic-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .hot-topic-card .hot-icon {
            width: 36px;
            height: 36px;
            flex-shrink: 0;
            background: rgba(244, 63, 94, .15);
            border: 1px solid rgba(244, 63, 94, .35);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--danger);
            font-size: .9rem;
        }
        .hot-topic-card .hot-title {
            font-size: .9rem;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        /* FAQ */
        .faq-item-custom {
            border: 1px solid var(--border);
            border-radius: 12px;
            background: var(--surface);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            margin-bottom: .75rem;
            overflow: hidden;
            transition: border-color .3s, box-shadow .3s;
        }
        .faq-item-custom.open {
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .faq-item-custom .faq-question {
            display: flex;
            align-items: center;
            gap: .75rem;
            padding: 1rem 1.25rem;
            font-size: .95rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: transparent;
            border: none;
            width: 100%;
            text-align: left;
            transition: color .3s;
        }
        .faq-item-custom .faq-question:hover {
            color: var(--accent);
        }
        .faq-item-custom .faq-number {
            width: 28px;
            height: 28px;
            flex-shrink: 0;
            border-radius: 50%;
            background: var(--accent-soft);
            border: 1px solid rgba(0, 212, 255, .35);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .75rem;
            color: var(--accent);
            font-weight: 700;
            font-family: var(--font-mono);
        }
        .faq-item-custom .faq-icon {
            margin-left: auto;
            font-size: .85rem;
            color: var(--muted);
            transition: transform .35s ease;
            flex-shrink: 0;
        }
        .faq-item-custom.open .faq-icon {
            transform: rotate(45deg);
            color: var(--accent);
        }
        .faq-item-custom .faq-answer {
            padding: 0 1.25rem 1.1rem 2.5rem;
            font-size: .88rem;
            color: var(--muted);
            line-height: 1.75;
            display: none;
        }
        .faq-item-custom.open .faq-answer {
            display: block;
        }
        /* Subscribe bar */
        .subscribe-bar {
            background: var(--surface);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: var(--radius-card);
            padding: 1.5rem 2rem;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35), var(--glow-cyan);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
            flex-wrap: wrap;
        }
        .subscribe-bar .subscribe-text {
            flex: 1;
            min-width: 240px;
        }
        .subscribe-bar .subscribe-text h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: .3rem;
            color: var(--text);
        }
        .subscribe-bar .subscribe-text p {
            font-size: .88rem;
            color: var(--muted);
            margin: 0;
        }
        /* Pagination */
        .pagination-training {
            display: flex;
            gap: .4rem;
            list-style: none;
            padding: 0;
            margin: 0;
            flex-wrap: wrap;
        }
        .pagination-training .page-link-custom {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: .88rem;
            font-weight: 500;
            text-decoration: none;
            transition: background .3s, border-color .3s, color .3s, box-shadow .3s;
        }
        .pagination-training .page-link-custom:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .pagination-training .page-link-custom.active {
            background: var(--primary-bright);
            border-color: var(--primary-bright);
            color: #fff;
            box-shadow: var(--glow-blue);
            cursor: default;
            pointer-events: none;
        }
        .pagination-training .page-link-custom.disabled {
            opacity: .4;
            pointer-events: none;
            cursor: default;
        }
        /* Related channel cards */
        .related-channel-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 1.25rem 1.5rem;
            text-align: center;
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            transition: background .3s, border-color .3s, box-shadow .3s, transform .3s;
            height: 100%;
            text-decoration: none;
            display: block;
        }
        .related-channel-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
            transform: translateY(-3px);
        }
        .related-channel-card .related-icon {
            width: 44px;
            height: 44px;
            margin: 0 auto .7rem;
            background: var(--accent-soft);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent);
            font-size: 1.1rem;
        }
        .related-channel-card .related-name {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text);
        }
        .related-channel-card .related-desc {
            font-size: .78rem;
            color: var(--muted);
            margin-top: .25rem;
        }
        /* Footer */
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding: 3rem 0 2rem;
            margin-top: 2rem;
        }
        .site-footer .container {
            max-width: 1320px;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text);
            text-decoration: none;
            display: inline-block;
            margin-bottom: .75rem;
        }
        .footer-brand:hover {
            color: var(--accent);
        }
        .footer-desc {
            font-size: .88rem;
            color: var(--muted);
            max-width: 60ch;
            line-height: 1.75;
            margin-bottom: 1.25rem;
        }
        .footer-links {
            list-style: none;
            padding: 0;
            margin: 0 0 1.5rem;
            display: flex;
            flex-wrap: wrap;
            gap: .5rem 1.25rem;
        }
        .footer-links li a {
            color: var(--muted);
            font-size: .88rem;
            text-decoration: none;
            transition: color .3s;
        }
        .footer-links li a:hover {
            color: var(--accent);
        }
        .footer-copy {
            display: flex;
            flex-wrap: wrap;
            gap: .5rem 1.25rem;
            font-size: .78rem;
            color: var(--muted);
            border-top: 1px solid var(--border);
            padding-top: 1.25rem;
        }
        .footer-copy a {
            color: var(--muted);
            text-decoration: none;
            transition: color .3s;
        }
        .footer-copy a:hover {
            color: var(--accent);
        }
        /* Page Hero for category */
        .category-hero {
            padding: 56px 0 40px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            background: linear-gradient(180deg, rgba(37, 99, 235, .08) 0%, rgba(10, 15, 30, 0) 100%);
        }
        .category-hero .category-h1 {
            font-size: 2.3rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: .75rem;
            letter-spacing: .01em;
        }
        .category-hero .category-lead {
            font-size: 1rem;
            color: var(--muted);
            max-width: 68ch;
            line-height: 1.85;
            margin-bottom: .5rem;
        }
        @media (max-width: 575.98px) {
            .category-hero .category-h1 {
                font-size: 1.75rem;
            }
        }
        /* Data strip */
        .data-strip-mini {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            padding: 0;
            margin: 0;
            list-style: none;
        }
        .data-strip-mini li {
            display: flex;
            align-items: center;
            gap: .5rem;
            font-size: .85rem;
            color: var(--muted);
        }
        .data-strip-mini li i {
            color: var(--accent);
            font-size: .8rem;
        }
        .data-strip-mini li strong {
            color: var(--text);
            font-weight: 700;
            font-family: var(--font-mono);
        }

/* roulang page: category6 */
:root {
            --bg: #0A0F1E;
            --bg-soft: #0F172A;
            --surface: rgba(255, 255, 255, .04);
            --surface-hover: rgba(255, 255, 255, .08);
            --border: rgba(255, 255, 255, .12);
            --border-strong: rgba(255, 255, 255, .22);
            --text: #E8EDF7;
            --muted: #9DB1CC;
            --primary: #2563EB;
            --primary-bright: #3B82F6;
            --accent: #00D4FF;
            --accent-soft: rgba(0, 212, 255, .16);
            --danger: #F43F5E;
            --glow-blue: 0 0 22px rgba(59, 130, 246, .55);
            --glow-cyan: 0 0 18px rgba(0, 212, 255, .5);
            --radius-card: 18px;
            --radius-btn: 12px;
            --radius-input: 10px;
            --radius-icon: 12px;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
            --font-mono: 'DIN Alternate', 'Roboto Mono', 'SF Mono', monospace;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.85;
            font-size: 1rem;
            margin: 0;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

        a {
            color: var(--accent);
            text-decoration: none;
            transition: color .25s ease;
        }
        a:hover {
            color: var(--primary-bright);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-radius: 4px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .container {
            max-width: 1200px;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            margin-left: auto;
            margin-right: auto;
        }

        section {
            padding: 56px 0;
            position: relative;
        }

        .section-label {
            display: inline-block;
            font-size: .78rem;
            letter-spacing: .06em;
            color: var(--accent);
            text-transform: uppercase;
            margin-bottom: .6rem;
            font-weight: 600;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.35;
            margin-bottom: .75rem;
            color: var(--text);
        }
        .section-subtitle {
            font-size: 1rem;
            color: var(--muted);
            max-width: 72ch;
            line-height: 1.85;
        }

        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: var(--primary-bright);
            color: #fff;
            border: none;
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 600;
            box-shadow: var(--glow-blue);
            transition: box-shadow .3s, transform .2s, background .3s;
            text-decoration: none;
        }
        .btn-primary-glow:hover {
            box-shadow: var(--glow-cyan);
            transform: translateY(-1px);
            color: #fff;
            background: #2f6fe4;
        }
        .btn-primary-glow:active {
            transform: translateY(0);
            box-shadow: var(--glow-blue);
        }
        .btn-secondary-glass {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            background: transparent;
            color: var(--text);
            border: 1px solid var(--border-strong);
            border-radius: var(--radius-btn);
            padding: .72rem 1.5rem;
            font-size: .95rem;
            font-weight: 500;
            backdrop-filter: blur(10px);
            transition: border-color .3s, box-shadow .3s, transform .2s;
            text-decoration: none;
        }
        .btn-secondary-glass:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            color: var(--text);
            transform: translateY(-1px);
        }
        .btn-ghost {
            background: transparent;
            border: none;
            color: var(--text);
            padding: .5rem 0;
            font-size: 1rem;
            transition: color .25s;
            text-align: left;
        }
        .btn-ghost:hover {
            color: var(--accent);
        }

        .badge-accent {
            display: inline-block;
            background: var(--accent-soft);
            color: var(--accent);
            border: 1px solid rgba(0, 212, 255, .35);
            border-radius: 999px;
            padding: .35em .8em;
            font-size: .75rem;
            font-weight: 500;
            letter-spacing: .02em;
            white-space: nowrap;
        }
        .badge-glass {
            display: inline-block;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .3em .75em;
            font-size: .72rem;
            color: var(--muted);
            white-space: nowrap;
        }

        /* Header */
        .top-header {
            position: sticky;
            top: 0;
            z-index: 1030;
            background: rgba(10, 15, 30, .82);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: .7rem 0;
        }
        .top-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: 1320px;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: .5rem;
            font-weight: 700;
            font-size: 1.35rem;
            color: var(--text);
            letter-spacing: .02em;
            text-decoration: none;
        }
        .brand-logo:hover {
            color: var(--text);
        }
        .logo-badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 26px;
            background: var(--accent-soft);
            border: 1px solid rgba(0, 212, 255, .4);
            border-radius: 6px;
            color: var(--accent);
            font-size: .72rem;
            font-weight: 700;
            font-family: var(--font-mono);
            letter-spacing: .04em;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: .8rem;
        }
        .hamburger-btn {
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 10px;
            cursor: pointer;
            transition: border-color .3s, box-shadow .3s;
            padding: 0;
        }
        .hamburger-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .hamburger-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
            transition: transform .3s, opacity .3s;
        }

        /* Drawer */
        .drawer-overlay {
            position: fixed;
            inset: 0;
            z-index: 1040;
            background: rgba(5, 8, 16, .75);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            opacity: 0;
            pointer-events: none;
            transition: opacity .4s ease;
        }
        .drawer-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }
        .drawer-panel {
            position: fixed;
            top: 0;
            right: -100%;
            width: 420px;
            height: 100vh;
            z-index: 1050;
            background: rgba(15, 23, 42, .97);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-left: 1px solid var(--border-strong);
            box-shadow: -10px 0 40px rgba(0, 0, 0, .55);
            transition: right .5s cubic-bezier(.4, 0, .2, 1);
            display: flex;
            flex-direction: column;
            padding: 1.5rem;
        }
        .drawer-panel.open {
            right: 0;
        }
        .drawer-header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 1.5rem;
        }
        .close-drawer-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--text);
            cursor: pointer;
            transition: border-color .3s, box-shadow .3s, transform .3s;
            font-size: 1.1rem;
        }
        .close-drawer-btn:hover {
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            transform: rotate(90deg);
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: .35rem;
            flex: 1;
        }
        .drawer-nav a {
            display: flex;
            flex-direction: column;
            padding: .7rem .8rem;
            border-radius: 10px;
            color: var(--text);
            font-size: 1.15rem;
            font-weight: 600;
            transition: background .3s, color .3s, border-color .3s;
            border: 1px solid transparent;
        }
        .drawer-nav a small {
            display: block;
            font-weight: 400;
            font-size: .78rem;
            color: var(--muted);
            margin-top: .15rem;
        }
        .drawer-nav a:hover,
        .drawer-nav a.active {
            background: var(--surface-hover);
            border-color: var(--border);
            color: var(--accent);
        }
        .drawer-nav a.active small {
            color: var(--accent);
        }
        .drawer-cta {
            margin-top: 1.2rem;
            border-top: 1px solid var(--border);
            padding-top: 1.2rem;
        }
        .drawer-social {
            display: flex;
            gap: .8rem;
            margin-top: 1rem;
        }
        .drawer-social a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border: 1px solid var(--border);
            border-radius: 10px;
            color: var(--muted);
            transition: border-color .3s, color .3s, box-shadow .3s;
        }
        .drawer-social a:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .drawer-foot {
            font-size: .72rem;
            color: var(--muted);
            margin-top: auto;
            padding-top: 1rem;
            border-top: 1px solid var(--border);
        }

        /* Glass card */
        .glass-card {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, .35);
            padding: 1.5rem;
            transition: background .3s, border-color .3s, box-shadow .3s, transform .3s;
        }
        .glass-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan), 0 8px 28px rgba(0, 0, 0, .4);
            transform: translateY(-2px);
        }

        /* Breadcrumb */
        .custom-breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: .4rem;
            font-size: .88rem;
            color: var(--muted);
        }
        .custom-breadcrumb a {
            color: var(--muted);
            text-decoration: none;
            transition: color .25s;
        }
        .custom-breadcrumb a:hover {
            color: var(--accent);
        }
        .custom-breadcrumb .sep {
            color: var(--border-strong);
            margin: 0 .2rem;
        }
        .custom-breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            pointer-events: none;
        }

        /* Classification header */
        .classification-header {
            padding: 40px 0 20px;
        }
        .classification-header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text);
            margin: .5rem 0 1rem;
        }
        .classification-header .lead {
            font-size: 1.05rem;
            color: var(--muted);
            max-width: 68ch;
            line-height: 1.85;
            margin-bottom: 0;
        }

        /* Tag buttons */
        .tag-strip {
            display: flex;
            flex-wrap: wrap;
            gap: .6rem;
        }
        .tag-btn {
            display: inline-flex;
            align-items: center;
            gap: .3rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 999px;
            padding: .4rem 1rem;
            font-size: .8rem;
            color: var(--muted);
            cursor: pointer;
            transition: background .3s, border-color .3s, color .3s, box-shadow .3s;
            white-space: nowrap;
        }
        .tag-btn:hover {
            border-color: var(--accent);
            color: var(--text);
        }
        .tag-btn[aria-pressed="true"] {
            background: var(--accent-soft);
            border-color: rgba(0, 212, 255, .6);
            color: var(--accent);
            box-shadow: var(--glow-cyan);
        }

        /* List body - custom card flow */
        .article-card-flow {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.25rem;
        }
        .article-card-flow .article-card {
            padding: 1rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: background .3s, border-color .3s, box-shadow .3s, transform .3s;
            display: flex;
            flex-direction: column;
        }
        .article-card-flow .article-card:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan), 0 8px 28px rgba(0, 0, 0, .4);
            transform: translateY(-2px);
        }
        .article-card-flow .article-card .card-img-top {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-radius: 12px;
            margin-bottom: .9rem;
            background: var(--bg-soft);
        }
        .article-card-flow .article-card h3 {
            font-size: 1.08rem;
            font-weight: 650;
            line-height: 1.45;
            margin: .3rem 0 .5rem;
            color: var(--text);
        }
        .article-card-flow .article-card h3 a {
            color: var(--text);
            text-decoration: none;
            transition: color .25s;
        }
        .article-card-flow .article-card h3 a:hover {
            color: var(--accent);
        }
        .article-card-flow .article-card .card-summary {
            font-size: .88rem;
            color: var(--muted);
            line-height: 1.7;
            margin-bottom: .7rem;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .article-card-flow .article-card .card-meta {
            display: flex;
            align-items: center;
            gap: .8rem;
            font-size: .72rem;
            color: var(--muted);
            margin-top: auto;
            padding-top: .6rem;
            border-top: 1px solid var(--border);
        }
        .article-card-flow .article-card .card-meta i {
            color: var(--accent);
            opacity: .7;
        }

        /* Hot topics */
        .hot-topic-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
        }
        .hot-topic-card {
            padding: 1rem 1.25rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: background .3s, border-color .3s, box-shadow .3s;
        }
        .hot-topic-card:hover {
            background: var(--surface-hover);
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .hot-topic-card h3 {
            font-size: .95rem;
            font-weight: 650;
            margin: .4rem 0 .3rem;
            color: var(--text);
        }
        .hot-topic-card p {
            font-size: .82rem;
            color: var(--muted);
            line-height: 1.65;
            margin: 0;
        }
        .hot-topic-card .topic-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--accent-soft);
            border-radius: var(--radius-icon);
            color: var(--accent);
            font-size: 1rem;
        }

        /* Recommended reading */
        .recommend-list {
            display: flex;
            flex-direction: column;
            gap: .8rem;
        }
        .recommend-item {
            display: flex;
            gap: 1rem;
            align-items: center;
            padding: .8rem 1rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 14px;
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: background .3s, border-color .3s, box-shadow .3s;
        }
        .recommend-item:hover {
            background: var(--surface-hover);
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .recommend-item .rec-thumb {
            width: 64px;
            height: 64px;
            border-radius: 10px;
            object-fit: cover;
            background: var(--bg-soft);
            flex-shrink: 0;
        }
        .recommend-item .rec-info h3 {
            font-size: .95rem;
            font-weight: 600;
            margin: 0 0 .2rem;
            color: var(--text);
        }
        .recommend-item .rec-info h3 a {
            color: var(--text);
            text-decoration: none;
            transition: color .25s;
        }
        .recommend-item .rec-info h3 a:hover {
            color: var(--accent);
        }
        .recommend-item .rec-info p {
            font-size: .8rem;
            color: var(--muted);
            margin: 0;
        }

        /* Subscribe strip */
        .subscribe-strip {
            background: linear-gradient(135deg, rgba(37, 99, 235, .16), rgba(0, 212, 255, .08));
            border: 1px solid rgba(0, 212, 255, .3);
            border-radius: var(--radius-card);
            padding: 1.5rem 1.75rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .subscribe-strip p {
            margin: 0;
            font-size: .95rem;
            color: var(--muted);
            max-width: 60ch;
            line-height: 1.7;
        }
        .subscribe-strip .strip-title {
            font-size: 1.15rem;
            font-weight: 650;
            color: var(--text);
            margin-bottom: .2rem;
        }

        /* FAQ */
        .faq-section {
            max-width: 820px;
        }
        .faq-item {
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: .8rem;
            overflow: hidden;
            background: var(--surface);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: border-color .3s, box-shadow .3s;
        }
        .faq-item:hover {
            border-color: var(--border-strong);
            box-shadow: var(--glow-cyan);
        }
        .faq-item .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1rem 1.25rem;
            font-size: .95rem;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            transition: color .25s;
        }
        .faq-item .faq-question:hover {
            color: var(--accent);
        }
        .faq-item .faq-question .faq-icon {
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--accent-soft);
            color: var(--accent);
            font-size: .85rem;
            transition: transform .3s;
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
            padding: 0 1.25rem;
            font-size: .88rem;
            color: var(--muted);
            line-height: 1.8;
            border-top: 0 solid var(--border);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 1rem 1.25rem 1.25rem;
            border-top-width: 1px;
        }

        /* Related circles */
        .related-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1.25rem;
        }
        .related-card {
            display: flex;
            align-items: center;
            gap: 1rem;
            padding: 1.25rem;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            transition: background .3s, border-color .3s, box-shadow .3s, transform .3s;
        }
        .related-card:hover {
            background: var(--surface-hover);
            border-color: var(--accent);
            box-shadow: var(--glow-cyan);
            transform: translateY(-2px);
        }
        .related-card .related-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 48px;
            height: 48px;
            border-radius: var(--radius-icon);
            background: var(--accent-soft);
            color: var(--accent);
            font-size: 1.25rem;
            flex-shrink: 0;
        }
        .related-card h3 {
            font-size: 1rem;
            font-weight: 650;
            margin: 0 0 .2rem;
            color: var(--text);
        }
        .related-card h3 a {
            color: var(--text);
            text-decoration: none;
            transition: color .25s;
        }
        .related-card h3 a:hover {
            color: var(--accent);
        }
        .related-card p {
            font-size: .82rem;
            color: var(--muted);
            margin: 0;
            line-height: 1.6;
        }

        /* Pagination */
        .custom-pagination {
            display: flex;
            align-items: center;
            gap: .5rem;
            flex-wrap: wrap;
        }
        .custom-pagination .page-num,
        .custom-pagination .page-arrow {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text);
            font-size: .88rem;
            font-weight: 500;
            text-decoration: none;
            transition: background .3s, border-color .3s, box-shadow .3s, color .3s;
        }
        .custom-pagination .page-num:hover,
        .custom-pagination .page-arrow:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: var(--glow-cyan);
        }
        .custom-pagination .page-num.active {
            background: var(--primary-bright);
            border-color: var(--primary-bright);
            color: #fff;
            box-shadow: var(--glow-blue);
            pointer-events: none;
        }
        .custom-pagination .page-arrow.disabled {
            opacity: .35;
            pointer-events: none;
        }
        .pagination-note {
            font-size: .78rem;
            color: var(--muted);
            margin-left: .5rem;
        }

        /* Footer */
        .site-footer {
            background: var(--bg-soft);
            border-top: 1px solid var(--border);
            padding: 2.5rem 0 1.5rem;
            margin-top: 2rem;
        }
        .site-footer .container {
            max-width: 1320px;
        }
        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--text);
            text-decoration: none;
            letter-spacing: .02em;
        }
        .footer-desc {
            font-size: .88rem;
            color: var(--muted);
            max-width: 60ch;
            line-height: 1.75;
            margin: .6rem 0 1.2rem;
        }
        .footer-links {
            list-style: none;
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            padding: 0;
            margin: 0 0 1.2rem;
        }
        .footer-links a {
            color: var(--muted);
            font-size: .88rem;
            text-decoration: none;
            transition: color .25s;
        }
        .footer-links a:hover {
            color: var(--accent);
        }
        .footer-copy {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            font-size: .75rem;
            color: var(--muted);
            border-top: 1px solid var(--border);
            padding-top: 1rem;
        }
        .footer-copy a {
            color: var(--muted);
            text-decoration: none;
            transition: color .25s;
        }
        .footer-copy a:hover {
            color: var(--accent);
        }

        /* Decorative */
        .speed-arc {
            position: absolute;
            width: 400px;
            height: 400px;
            border: 1px solid rgba(0, 212, 255, .18);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }
        .speed-arc::after {
            content: '';
            position: absolute;
            inset: 30px;
            border: 1px dashed rgba(0, 212, 255, .12);
            border-radius: 50%;
        }
        .speed-arc.arc-right {
            right: -180px;
            top: -80px;
        }
        .speed-arc.arc-left {
            left: -200px;
            bottom: -60px;
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: .01ms !important;
                animation-iteration-count: 1 !important;
                transition-duration: .01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

        @media (max-width: 1024px) {
            .article-card-flow {
                grid-template-columns: repeat(2, 1fr);
            }
            .hot-topic-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 40px 0;
            }
            .classification-header h1 {
                font-size: 1.9rem;
            }
            .article-card-flow,
            .hot-topic-grid {
                grid-template-columns: 1fr;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .drawer-panel {
                width: 100vw;
                max-width: 100vw;
            }
            .subscribe-strip {
                flex-direction: column;
                align-items: flex-start;
            }
            .recommend-item .rec-thumb {
                width: 48px;
                height: 48px;
            }
            .classification-header {
                padding: 24px 0 12px;
            }
        }

        @media (max-width: 520px) {
            .classification-header h1 {
                font-size: 1.6rem;
            }
            .btn-primary-glow,
            .btn-secondary-glass {
                width: 100%;
                text-align: center;
            }
            .header-actions .btn-secondary-glass.d-none.d-md-inline-flex {
                display: none !important;
            }
            .article-card-flow .article-card {
                padding: .85rem;
            }
            .article-card-flow .article-card h3 {
                font-size: 1rem;
            }
            .custom-pagination .page-num,
            .custom-pagination .page-arrow {
                width: 36px;
                height: 36px;
            }
            .footer-copy {
                flex-direction: column;
                gap: .4rem;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}