/* roulang page: index */
:root {
            --brand: #0EA5E9;
            --brand-light: #22D3EE;
            --accent: #F59E0B;
            --bg-main: #0B1120;
            --bg-section: #0F172A;
            --bg-card: #111C2E;
            --text-main: #E2E8F0;
            --text-weak: #94A3B8;
            --border-weak: rgba(255, 255, 255, 0.08);
            --radius-card: 1rem;
            --shadow-card: 0 10px 30px rgba(0, 0, 0, 0.25);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            background-color: #0B1120;
            color: #E2E8F0;
            line-height: 1.7;
            overflow-x: hidden;
        }

        .container-custom {
            max-width: 84rem;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        @media (min-width: 768px) {
            .container-custom {
                padding-left: 2rem;
                padding-right: 2rem;
            }
        }

        .hero-bg-grid {
            background-image: radial-gradient(circle, rgba(148, 163, 184, 0.12) 1px, transparent 1px);
            background-size: 32px 32px;
        }

        .hero-runway-line {
            position: absolute;
            bottom: 0;
            left: 10%;
            right: 10%;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.6), transparent);
        }

        .glass-card {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        @supports not (backdrop-filter: blur(1px)) {
            .glass-card {
                background: rgba(17, 28, 46, 0.85);
            }
        }

        .btn-glow {
            background: linear-gradient(135deg, #0EA5E9, #22D3EE);
            box-shadow: 0 0 20px rgba(34, 211, 238, 0.35);
            transition: all 0.3s ease;
        }
        .btn-glow:hover {
            box-shadow: 0 0 30px rgba(34, 211, 238, 0.55);
            transform: translateY(-2px);
            filter: brightness(1.1);
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 15px rgba(34, 211, 238, 0.3);
        }

        .btn-outline {
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.05);
            transition: all 0.3s ease;
        }
        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.4);
            transform: translateY(-2px);
        }

        .card-hover {
            transition: all 0.3s ease;
        }
        .card-hover:hover {
            border-color: rgba(255, 255, 255, 0.2);
            box-shadow: 0 0 25px rgba(14, 165, 233, 0.15), 0 10px 40px rgba(0, 0, 0, 0.3);
            transform: translateY(-4px);
        }

        .nav-channel-active {
            background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(34, 211, 238, 0.1));
            border-bottom: 2px solid #22D3EE;
            color: #22D3EE;
            box-shadow: 0 2px 12px rgba(34, 211, 238, 0.2);
        }

        .nav-channel-item {
            padding: 0.5rem 1.25rem;
            border-radius: 0.75rem 0.75rem 0 0;
            font-size: 0.9rem;
            font-weight: 500;
            color: #94A3B8;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            white-space: nowrap;
        }

        .nav-channel-item:hover {
            background: rgba(255, 255, 255, 0.06);
            color: #E2E8F0;
        }

        .badge-border {
            border: 1px solid rgba(245, 158, 11, 0.5);
            background: rgba(245, 158, 11, 0.08);
        }

        .text-glow {
            text-shadow: 0 0 20px rgba(34, 211, 238, 0.3);
        }

        .card-img {
            transition: transform 0.5s ease;
        }
        .card-hover:hover .card-img {
            transform: scale(1.03);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 200px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-icon {
            transition: transform 0.3s ease;
        }

        .form-input {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 0.75rem;
            padding: 0.8rem 1rem;
            width: 100%;
            color: #E2E8F0;
            transition: all 0.3s ease;
        }
        .form-input:focus {
            outline: none;
            border-color: #22D3EE;
            box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.2);
            background: rgba(255, 255, 255, 0.12);
        }
        .form-input::placeholder {
            color: #94A3B8;
            opacity: 0.7;
        }

        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            background: linear-gradient(135deg, #22D3EE, #0EA5E9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            text-shadow: 0 0 30px rgba(34, 211, 238, 0.1);
        }

        ::selection {
            background: rgba(34, 211, 238, 0.3);
        }

        .text-gradient-brand {
            background: linear-gradient(135deg, #22D3EE, #0EA5E9);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8rem;
            color: #22D3EE;
            background: rgba(34, 211, 238, 0.08);
            border: 1px solid rgba(34, 211, 238, 0.2);
            border-radius: 9999px;
            padding: 0.25rem 1rem;
        }

        .line-clamp-2 {
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .line-clamp-3 {
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .compare-table-row {
            display: flex;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            padding: 1rem 0;
        }
        .compare-table-row:last-child {
            border-bottom: none;
        }

        .badge-status {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.75rem;
            font-weight: 500;
            padding: 0.15rem 0.75rem;
            border-radius: 9999px;
        }

        .badge-blue {
            background: rgba(34, 211, 238, 0.1);
            color: #22D3EE;
            border: 1px solid rgba(34, 211, 238, 0.2);
        }

        .badge-amber {
            background: rgba(245, 158, 11, 0.1);
            color: #F59E0B;
            border: 1px solid rgba(245, 158, 11, 0.2);
        }

        .badge-green {
            background: rgba(16, 185, 129, 0.1);
            color: #10B981;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .badge-red {
            background: rgba(239, 68, 68, 0.1);
            color: #EF4444;
            border: 1px solid rgba(239, 68, 68, 0.2);
        }

        .hero-badge {
            backdrop-filter: blur(10px);
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 9999px;
            padding: 0.4rem 1.2rem;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .mobile-nav-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 320px;
            height: 100vh;
            background: rgba(11, 17, 32, 0.98);
            backdrop-filter: blur(20px);
            z-index: 100;
            transition: right 0.4s ease;
            padding: 2rem 1.5rem;
            overflow-y: auto;
        }
        .mobile-nav-drawer.open {
            right: 0;
        }
        .drawer-overlay {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 99;
            display: none;
        }
        .drawer-overlay.open {
            display: block;
        }

        .section-wave {
            position: relative;
        }
        .section-wave::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(34, 211, 238, 0.3), transparent);
        }

        @media (max-width: 640px) {
            .stat-number {
                font-size: 1.8rem;
            }
            .hero-badge {
                font-size: 0.75rem;
                padding: 0.3rem 0.8rem;
            }
        }

        .lineage-card {
            border-left: 3px solid #22D3EE;
        }

/* roulang page: article */
:root {
    --bg-main: #0B1120;
    --bg-secondary: #0F172A;
    --bg-card: rgba(255, 255, 255, 0.04);
    --border-light: rgba(255, 255, 255, 0.08);
    --brand-400: #22D3EE;
    --brand-500: #0EA5E9;
    --brand-600: #0284C7;
    --accent: #F59E0B;
    --text-primary: #F8FAFC;
    --text-secondary: #CBD5E1;
    --text-muted: #94A3B8;
    --radius-card: 1rem;
    --radius-btn: 0.75rem;
    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.25);
    --shadow-glow: 0 0 20px rgba(34, 211, 238, 0.35);
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg-main);
    color: var(--text-secondary);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

.container-custom {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

@media (min-width: 1024px) {
    .container-custom { padding: 0 2rem; }
}

a { color: inherit; text-decoration: none; transition: all 0.2s ease; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

:focus-visible {
    outline: 2px solid var(--brand-400);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== Header ===== */
.header-brand {
    background: rgba(10, 14, 26, 0.96);
    border-bottom: 1px solid var(--border-light);
}

.nav-channel-item {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.55rem 1.05rem;
    border-radius: 999px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    white-space: nowrap;
    transition: all 0.2s ease;
}
.nav-channel-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}
.nav-channel-active,
.nav-channel-item.nav-channel-active:hover {
    background: linear-gradient(135deg, #0EA5E9, #22D3EE);
    color: #0B1120;
    font-weight: 600;
    box-shadow: 0 0 18px rgba(34, 211, 238, 0.3);
}

.btn-glow {
    background: linear-gradient(135deg, #0EA5E9, #22D3EE);
    box-shadow: var(--shadow-glow);
    transition: all 0.2s ease;
}
.btn-glow:hover {
    box-shadow: 0 0 30px rgba(34, 211, 238, 0.55);
    transform: translateY(-2px);
    color: #fff;
}
.btn-ghost {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-light);
    transition: all 0.2s ease;
}
.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(34, 211, 238, 0.5);
    color: #fff;
    transform: translateY(-2px);
}

/* ===== Mobile drawer ===== */
.mobile-drawer-overlay {
    position: fixed;
    inset: 0;
    z-index: 90;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}
.mobile-drawer-overlay.open { opacity: 1; pointer-events: auto; }

.mobile-drawer-panel {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    z-index: 100;
    background: #0F172A;
    border-left: 1px solid rgba(255, 255, 255, 0.08);
    padding: 1.5rem;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform 0.3s ease;
}
.mobile-drawer-panel.open { transform: translateX(0); }

.mobile-nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.85rem 1rem;
    border-radius: 0.75rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: background 0.2s ease;
}
.mobile-nav-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
}
.mobile-nav-item.active {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.15), rgba(34, 211, 238, 0.15));
    color: var(--brand-400);
    font-weight: 500;
    border: 1px solid rgba(34, 211, 238, 0.25);
}

/* ===== Breadcrumb ===== */
.breadcrumb-bar {
    background: #0D1425;
    border-bottom: 1px solid var(--border-light);
}
.breadcrumb-link {
    color: var(--text-muted);
    font-size: 0.8rem;
}
.breadcrumb-link:hover { color: var(--brand-400); }
.breadcrumb-current {
    color: var(--text-secondary);
    font-size: 0.8rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    max-width: 180px;
}
@media (min-width: 768px) {
    .breadcrumb-current { max-width: 400px; }
}

/* ===== Article hero ===== */
.article-hero {
    position: relative;
    padding: 2.5rem 0 2rem;
    overflow: hidden;
}
@media (min-width: 768px) {
    .article-hero { padding: 3.5rem 0 2.5rem; }
}
.article-hero .bg-layer {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
}
.article-hero .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(11, 17, 32, 0.98) 30%, rgba(11, 17, 32, 0.88) 60%, rgba(11, 17, 32, 0.7) 100%);
}
.article-hero .grid-pattern {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(34, 211, 238, 0.08) 1px, transparent 1px);
    background-size: 26px 26px;
    opacity: 0.4;
}

.article-meta-item {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 0.3rem 0.85rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
}
.article-meta-item i { color: var(--brand-400); font-size: 0.7rem; }

/* ===== Article body ===== */
.article-body-wrap {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 1.25rem;
}

.article-content {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text-secondary);
}
.article-content p { margin-bottom: 1.25rem; }
.article-content h2 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin: 2.25rem 0 0.9rem;
    line-height: 1.4;
    letter-spacing: -0.01em;
}
.article-content h3 {
    font-size: 1.15rem;
    font-weight: 600;
    color: #fff;
    margin: 1.75rem 0 0.75rem;
    line-height: 1.5;
}
.article-content ul,
.article-content ol {
    margin: 0 0 1.25rem;
    padding-left: 1.5rem;
}
.article-content ul li { margin-bottom: 0.5rem; }
.article-content ul li::marker { color: var(--brand-400); }
.article-content ol li { margin-bottom: 0.5rem; }
.article-content ol li::marker { color: var(--brand-400); font-weight: 600; }
.article-content blockquote {
    border-left: 3px solid var(--brand-500);
    padding: 0.8rem 1.25rem;
    margin: 1.5rem 0;
    background: rgba(14, 165, 233, 0.06);
    border-radius: 0 0.75rem 0.75rem 0;
    color: var(--text-secondary);
    font-style: italic;
}
.article-content img {
    border-radius: 1rem;
    margin: 1.5rem 0;
    box-shadow: var(--shadow-card);
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.9rem;
}
.article-content table th {
    background: rgba(14, 165, 233, 0.1);
    color: #fff;
    font-weight: 600;
    text-align: left;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-light);
}
.article-content table td {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-light);
}
.article-content a {
    color: var(--brand-400);
    border-bottom: 1px solid transparent;
}
.article-content a:hover { border-bottom-color: var(--brand-400); }

/* ===== Card ===== */
.card-base {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-card);
    transition: all 0.3s ease;
}
.card-base:hover {
    border-color: rgba(34, 211, 238, 0.3);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 20px rgba(34, 211, 238, 0.08);
    transform: translateY(-3px);
}

/* ===== Section title ===== */
.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.01em;
    line-height: 1.3;
}
@media (min-width: 768px) {
    .section-title { font-size: 2rem; }
}
.section-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* ===== Tag ===== */
.tag-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.75rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(14, 165, 233, 0.12);
    color: var(--brand-400);
    border: 1px solid rgba(14, 165, 233, 0.2);
    transition: all 0.2s ease;
}
.tag-badge:hover {
    background: rgba(14, 165, 233, 0.2);
    border-color: rgba(14, 165, 233, 0.4);
}
.tag-badge-amber {
    background: rgba(245, 158, 11, 0.12);
    color: #F59E0B;
    border-color: rgba(245, 158, 11, 0.25);
}
.tag-badge-amber:hover {
    background: rgba(245, 158, 11, 0.2);
    border-color: rgba(245, 158, 11, 0.45);
}

/* ===== FAQ ===== */
.faq-item {
    border: 1px solid var(--border-light);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: border-color 0.3s ease;
    background: rgba(255, 255, 255, 0.02);
}
.faq-item:hover { border-color: rgba(34, 211, 238, 0.25); }
.faq-item.open { border-color: rgba(34, 211, 238, 0.35); }
.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1rem 1.25rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
    background: none;
    transition: background 0.2s ease;
}
.faq-question:hover { background: rgba(255, 255, 255, 0.03); }
.faq-icon {
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(14, 165, 233, 0.15);
    color: var(--brand-400);
    font-size: 0.75rem;
    flex-shrink: 0;
    transition: transform 0.3s ease;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.faq-answer-inner {
    padding: 0 1.25rem 1.1rem;
    font-size: 0.9rem;
    color: var(--text-muted);
    line-height: 1.75;
}

/* ===== Form ===== */
.form-input {
    width: 100%;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-btn);
    padding: 0.75rem 1rem;
    font-size: 0.9rem;
    color: #fff;
    transition: all 0.2s ease;
}
.form-input::placeholder { color: #64748B; }
.form-input:focus {
    outline: none;
    border-color: var(--brand-400);
    box-shadow: 0 0 0 3px rgba(34, 211, 238, 0.15);
    background: rgba(255, 255, 255, 0.08);
}
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394A3B8' stroke-width='2'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1rem;
    padding-right: 2.5rem;
}

/* ===== Related post card ===== */
.related-card {
    overflow: hidden;
}
.related-cover {
    height: 150px;
    background-size: cover;
    background-position: center;
    position: relative;
}
.related-cover::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(11, 17, 32, 0.6), transparent 60%);
}

/* ===== Footer ===== */
.footer-link {
    color: var(--text-muted);
    font-size: 0.85rem;
    transition: color 0.2s ease;
}
.footer-link:hover { color: var(--brand-400); }

/* ===== Pagination / prev-next ===== */
.pn-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-btn);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-light);
    font-size: 0.85rem;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}
.pn-link:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(34, 211, 238, 0.3);
    color: #fff;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
    .desktop-nav { display: none !important; }
}

@media (min-width: 1024px) {
    .mobile-hamburger { display: none !important; }
}

@media (min-width: 768px) {
    .article-content { font-size: 1.05rem; }
}

/* roulang page: category2 */
:root {
    --bg-dark: #0B1120;
    --bg-deep: #080E1A;
    --bg-panel: #0F172A;
    --bg-soft: #111C2E;
    --brand-400: #22D3EE;
    --brand-500: #0EA5E9;
    --accent: #F59E0B;
    --success: #10B981;
    --danger: #EF4444;
    --text-main: #F1F5F9;
    --text-sub: #94A3B8;
    --text-weak: #64748B;
    --border-main: rgba(255,255,255,0.08);
    --radius-card: 18px;
    --radius-btn: 12px;
    --shadow-glow: 0 0 24px rgba(34,211,238,0.35);
    --font-display: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-body: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  }

  * {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-body);
    background: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

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

  a {
    color: inherit;
    text-decoration: none;
  }

  button {
    font-family: inherit;
  }

  .container-custom {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
  }

  .bg-dark-950 {
    background: #0B1120;
  }

  .nav-channel-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    color: #94A3B8;
    border-radius: 12px 12px 0 0;
    border-bottom: 2px solid transparent;
    transition: all 0.25s ease;
    white-space: nowrap;
  }

  .nav-channel-item:hover {
    color: #E2E8F0;
    background: rgba(255,255,255,0.05);
  }

  .nav-channel-item:focus-visible {
    outline: 2px solid var(--brand-400);
    outline-offset: -2px;
  }

  .nav-channel-active {
    color: #22D3EE !important;
    border-bottom-color: #22D3EE;
    text-shadow: 0 0 12px rgba(34,211,238,0.5);
  }

  .btn-glow {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #0EA5E9, #22D3EE);
    color: #F8FAFC;
    font-weight: 600;
    border-radius: 12px;
    padding: 12px 24px;
    box-shadow: 0 0 20px rgba(34,211,238,0.35);
    transition: all 0.25s ease;
    border: none;
    cursor: pointer;
  }

  .btn-glow:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 32px rgba(34,211,238,0.55);
    filter: brightness(1.1);
  }

  .btn-glow:active {
    transform: translateY(0);
  }

  .btn-glow:focus-visible {
    outline: 2px solid #fff;
    outline-offset: 3px;
  }

  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: rgba(255,255,255,0.06);
    color: #E2E8F0;
    font-weight: 600;
    border-radius: 12px;
    padding: 12px 24px;
    border: 1px solid rgba(255,255,255,0.15);
    transition: all 0.25s ease;
    cursor: pointer;
  }

  .btn-ghost:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.3);
    transform: translateY(-2px);
  }

  .btn-ghost:focus-visible {
    outline: 2px solid var(--brand-400);
    outline-offset: 3px;
  }

  .badge-verify {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(245,158,11,0.15);
    color: #F59E0B;
    padding: 5px 14px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid rgba(245,158,11,0.3);
  }

  .card-glass {
    background: rgba(255,255,255,0.04);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 18px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.25);
  }

  .card-hover {
    transition: all 0.3s ease;
  }

  .card-hover:hover {
    border-color: rgba(255,255,255,0.2);
    box-shadow: 0 16px 40px rgba(0,0,0,0.35), 0 0 24px rgba(34,211,238,0.08);
    transform: translateY(-4px);
  }

  .section-tag {
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: #22D3EE;
    margin-bottom: 10px;
    display: block;
  }

  .section-title {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    color: #F1F5F9;
  }

  .section-desc {
    font-size: 16px;
    color: #94A3B8;
    max-width: 640px;
    line-height: 1.8;
  }

  .entry-number {
    font-size: 42px;
    font-weight: 800;
    color: rgba(34,211,238,0.2);
    font-family: 'DIN Alternate', 'Arial', sans-serif;
    line-height: 1;
  }

  .metric-number {
    font-size: 34px;
    font-weight: 800;
    color: #22D3EE;
    text-shadow: 0 0 18px rgba(34,211,238,0.45);
    line-height: 1.2;
  }

  .faq-item {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color 0.3s ease;
  }

  .faq-item.active {
    border-color: rgba(34,211,238,0.3);
  }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 18px 24px;
    background: transparent;
    border: none;
    color: #E2E8F0;
    font-size: 16px;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    transition: background 0.25s ease;
  }

  .faq-question:hover {
    background: rgba(255,255,255,0.04);
  }

  .faq-question:focus-visible {
    outline: 2px solid var(--brand-400);
    outline-offset: -2px;
  }

  .faq-icon {
    width: 28px;
    height: 28px;
    min-width: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: rgba(34,211,238,0.1);
    color: #22D3EE;
    font-size: 15px;
    transition: transform 0.35s ease;
  }

  .faq-item.active .faq-icon {
    transform: rotate(180deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
  }

  .faq-item.active .faq-answer {
    max-height: 240px;
  }

  .faq-answer-inner {
    padding: 0 24px 20px;
    color: #94A3B8;
    font-size: 15px;
    line-height: 1.8;
  }

  .form-input {
    width: 100%;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.14);
    border-radius: 12px;
    padding: 12px 16px;
    color: #F1F5F9;
    font-size: 14px;
    transition: all 0.25s ease;
  }

  .form-input::placeholder {
    color: #64748B;
  }

  .form-input:focus {
    outline: none;
    border-color: #22D3EE;
    box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
  }

  .sidebar-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    border-radius: 10px;
    font-size: 14px;
    color: #94A3B8;
    transition: all 0.25s ease;
    border: 1px solid transparent;
  }

  .sidebar-link:hover {
    color: #22D3EE;
    background: rgba(34,211,238,0.06);
  }

  .sidebar-link:focus-visible {
    outline: 2px solid var(--brand-400);
    outline-offset: 2px;
  }

  .mobile-nav-panel {
    position: fixed;
    inset: 0;
    background: rgba(11,17,32,0.97);
    backdrop-filter: blur(20px);
    z-index: 100;
    display: flex;
    flex-direction: column;
    padding: 24px;
    transform: translateX(-100%);
    transition: transform 0.35s ease;
  }

  .mobile-nav-panel.open {
    transform: translateX(0);
  }

  .mobile-nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 14px;
    font-size: 17px;
    font-weight: 600;
    color: #E2E8F0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    transition: all 0.25s ease;
  }

  .mobile-nav-link:hover {
    background: rgba(255,255,255,0.06);
    color: #22D3EE;
  }

  .mobile-nav-link.mobile-active {
    color: #22D3EE;
    background: rgba(34,211,238,0.08);
  }

  .hero-back {
    background-image: linear-gradient(90deg, rgba(11,17,32,0.92) 0%, rgba(11,17,32,0.68) 60%, rgba(11,17,32,0.4) 100%), url('/assets/images/backpic/back-2.webp');
    background-size: cover;
    background-position: center;
  }

  @media (max-width: 1024px) {
    .section-title {
      font-size: 28px;
    }
    .metric-number {
      font-size: 28px;
    }
  }

  @media (max-width: 768px) {
    .container-custom {
      padding: 0 18px;
    }
    .section-title {
      font-size: 24px;
    }
    .section-desc {
      font-size: 15px;
    }
    .entry-number {
      font-size: 32px;
    }
    .btn-glow, .btn-ghost {
      padding: 10px 20px;
      font-size: 14px;
    }
  }

  @media (max-width: 520px) {
    .container-custom {
      padding: 0 14px;
    }
    .section-title {
      font-size: 22px;
    }
  }

/* roulang page: category1 */
:root {
            --brand-400: #22D3EE;
            --brand-500: #0EA5E9;
            --bg-primary: #0B1120;
            --bg-secondary: #0F172A;
            --bg-tertiary: #111C2E;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255,255,255,0.08);
            --shadow-card: 0 4px 24px rgba(0,0,0,0.35);
            --shadow-glow: 0 0 20px rgba(34,211,238,0.35);
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        .container-custom {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        a {
            color: inherit;
            text-decoration: none;
        }

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

        button {
            cursor: pointer;
            font-family: inherit;
        }

        input,
        textarea,
        select {
            font-family: inherit;
        }

        .nav-channel-item {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            padding: 0.65rem 1rem;
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 0.5rem;
            transition: all 0.25s ease;
            white-space: nowrap;
        }
        .nav-channel-item:hover {
            background: rgba(255,255,255,0.05);
            color: #fff;
        }
        .nav-channel-active {
            background: linear-gradient(135deg, rgba(14,165,233,0.15), rgba(34,211,238,0.1));
            color: var(--brand-400) !important;
            border: 1px solid rgba(34,211,238,0.2);
            box-shadow: 0 0 12px rgba(34,211,238,0.1);
        }

        .btn-glow {
            background: linear-gradient(135deg, #0EA5E9, #22D3EE);
            box-shadow: 0 0 20px rgba(34,211,238,0.35);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border: none;
        }
        .btn-glow:hover {
            box-shadow: 0 0 28px rgba(34,211,238,0.55);
            transform: translateY(-2px);
        }
        .btn-glow:active {
            transform: translateY(0);
            box-shadow: 0 0 18px rgba(34,211,238,0.35);
        }

        .btn-outline {
            border: 1px solid rgba(255,255,255,0.15);
            background: rgba(255,255,255,0.05);
            backdrop-filter: blur(8px);
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            justify-content: center;
        }
        .btn-outline:hover {
            border-color: rgba(34,211,238,0.4);
            background: rgba(34,211,238,0.1);
            transform: translateY(-2px);
        }
        .btn-outline:active {
            transform: translateY(0);
        }

        .info-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-light);
            border-radius: 1.25rem;
            overflow: hidden;
            transition: all 0.3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .info-card:hover {
            border-color: rgba(34,211,238,0.3);
            background: rgba(255,255,255,0.06);
            box-shadow: 0 8px 30px rgba(0,0,0,0.3), 0 0 16px rgba(34,211,238,0.08);
            transform: translateY(-4px);
        }
        .info-card .card-img {
            height: 180px;
            overflow: hidden;
            position: relative;
        }
        .info-card .card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .info-card:hover .card-img img {
            transform: scale(1.04);
        }
        .info-card .card-body {
            padding: 1.25rem;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .info-card .card-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 0.35rem;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.65rem;
            border-radius: 9999px;
            font-size: 0.75rem;
            font-weight: 500;
            background: rgba(34,211,238,0.1);
            color: var(--brand-400);
            border: 1px solid rgba(34,211,238,0.15);
        }
        .tag-chip-amber {
            background: rgba(245,158,11,0.1);
            color: #FBBF24;
            border-color: rgba(245,158,11,0.2);
        }

        .badge-official {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            padding: 0.3rem 0.75rem;
            border-radius: 9999px;
            background: rgba(245,158,11,0.12);
            border: 1px solid rgba(245,158,11,0.25);
            color: #FBBF24;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .category-hero {
            position: relative;
            padding: 4.5rem 0 3.5rem;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(8,14,26,0.95) 20%, rgba(8,14,26,0.75) 50%, rgba(8,14,26,0.45) 100%);
        }
        .category-hero .hero-inner {
            position: relative;
            z-index: 2;
        }

        .stat-card {
            background: rgba(255,255,255,0.04);
            border: 1px solid var(--border-light);
            border-radius: 1rem;
            padding: 1.5rem;
            text-align: center;
            transition: all 0.3s ease;
        }
        .stat-card:hover {
            border-color: rgba(34,211,238,0.25);
            background: rgba(34,211,238,0.06);
        }
        .stat-card .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--brand-400);
            text-shadow: 0 0 20px rgba(34,211,238,0.3);
            line-height: 1.2;
        }

        .feature-card {
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--border-light);
            border-radius: 1.25rem;
            padding: 1.5rem;
            transition: all 0.3s ease;
            height: 100%;
        }
        .feature-card:hover {
            border-color: rgba(34,211,238,0.25);
            background: rgba(255,255,255,0.05);
            transform: translateY(-3px);
        }
        .feature-card .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 1rem;
            background: linear-gradient(135deg, rgba(14,165,233,0.2), rgba(34,211,238,0.1));
            border: 1px solid rgba(34,211,238,0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1rem;
            color: var(--brand-400);
            font-size: 1.25rem;
        }

        .faq-item {
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--border-light);
            border-radius: 1rem;
            margin-bottom: 1rem;
            transition: border-color 0.3s;
            overflow: hidden;
        }
        .faq-item[open] {
            border-color: rgba(34,211,238,0.25);
        }
        .faq-item summary {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1.25rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            list-style: none;
            color: var(--text-primary);
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary:hover {
            color: var(--brand-400);
        }
        .faq-item .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 9999px;
            background: rgba(34,211,238,0.15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            color: var(--brand-400);
            transition: transform 0.3s;
            flex-shrink: 0;
        }
        .faq-item[open] .faq-icon {
            transform: rotate(45deg);
        }
        .faq-item .faq-body {
            padding: 0 1.5rem 1.25rem;
            color: var(--text-secondary);
            font-size: 0.9375rem;
            line-height: 1.8;
        }

        .form-input {
            width: 100%;
            padding: 0.8rem 1rem;
            border-radius: 0.75rem;
            background: rgba(255,255,255,0.08);
            border: 1px solid rgba(255,255,255,0.15);
            color: #fff;
            font-size: 0.9375rem;
            transition: all 0.3s;
        }
        .form-input:focus {
            border-color: var(--brand-400);
            box-shadow: 0 0 0 3px rgba(34,211,238,0.15);
            outline: none;
        }
        .form-input::placeholder {
            color: var(--text-muted);
        }
        select.form-input option {
            background: #0F172A;
            color: #fff;
        }

        .mobile-drawer {
            position: fixed;
            top: 0;
            right: -100%;
            width: 300px;
            height: 100vh;
            background: rgba(8,14,26,0.98);
            backdrop-filter: blur(20px);
            z-index: 1000;
            padding: 1.5rem;
            transition: right 0.35s ease;
            border-left: 1px solid rgba(255,255,255,0.08);
            display: flex;
            flex-direction: column;
        }
        .mobile-drawer.open {
            right: 0;
        }
        .mobile-drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.6);
            z-index: 999;
            opacity: 0;
            pointer-events: none;
            transition: opacity 0.3s;
        }
        .mobile-drawer-overlay.open {
            opacity: 1;
            pointer-events: auto;
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: 2px solid var(--brand-400);
            outline-offset: 2px;
        }

        .section-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(34,211,238,0.2), transparent);
            border: none;
        }

        .cta-panel {
            background: linear-gradient(135deg, rgba(14,165,233,0.08), rgba(34,211,238,0.04));
            border: 1px solid rgba(34,211,238,0.15);
            border-radius: 1.5rem;
            padding: 2.5rem;
        }

        @media (max-width: 1024px) {
            .category-hero {
                padding: 3.5rem 0 2.5rem;
            }
            .stat-card .stat-num {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .container-custom {
                padding: 0 1rem;
            }
            .category-hero {
                padding: 2.5rem 0 2rem;
                background-position: 65% center;
            }
            .category-hero::before {
                background: linear-gradient(90deg, rgba(8,14,26,0.95), rgba(8,14,26,0.85), rgba(8,14,26,0.7));
            }
            .section-title {
                font-size: 1.5rem;
            }
            .cta-panel {
                padding: 1.5rem;
            }
            .info-card .card-img {
                height: 160px;
            }
        }

        @media (max-width: 520px) {
            .stat-card .stat-num {
                font-size: 1.25rem;
            }
            .faq-item summary {
                padding: 1rem;
                font-size: 0.9375rem;
            }
            .faq-item .faq-body {
                padding: 0 1rem 1rem;
            }
        }