/* roulang page: index */
:root {
            --bg-primary: #0B0F2A;
            --bg-secondary: #121735;
            --bg-card: #161D3F;
            --brand-primary: #00E5A0;
            --brand-secondary: #7C5CFF;
            --text-primary: #FFFFFF;
            --text-secondary: #A0A8C8;
            --border-color: #1E2650;
            --radius-card: 1rem;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color 0.2s ease;
        }

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

        button,
        input {
            font-family: inherit;
            outline: none;
        }

        .container-x {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        @media (max-width: 768px) {
            .container-x {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        .text-glow {
            text-shadow: 0 0 30px rgba(0, 229, 160, 0.4);
        }

        .hero-bg {
            background-image: linear-gradient(135deg, #0B0F2A 0%, #0B0F2A 45%, rgba(11, 15, 42, 0.85) 70%, rgba(11, 15, 42, 0.6) 100%), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center 30%;
            background-repeat: no-repeat;
        }

        .card-glow:hover {
            box-shadow: 0 0 40px rgba(0, 229, 160, 0.15), 0 8px 32px rgba(0, 0, 0, 0.4);
            border-color: rgba(0, 229, 160, 0.4);
            transform: translateY(-4px);
        }

        .card-glow {
            transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .badge-glow {
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.2);
        }

        .nav-link {
            position: relative;
            font-weight: 500;
            color: #A0A8C8;
            transition: color 0.2s;
        }

        .nav-link:hover {
            color: #00E5A0;
        }

        .nav-link.active {
            color: #00E5A0;
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -4px;
            width: 100%;
            height: 2px;
            background: #00E5A0;
            border-radius: 2px;
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.5);
        }

        .btn-primary {
            background: linear-gradient(135deg, #00E5A0, #00C48A);
            color: #0B0F2A;
            font-weight: 700;
            border-radius: 12px;
            padding: 0.75rem 1.75rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            box-shadow: 0 4px 20px rgba(0, 229, 160, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 32px rgba(0, 229, 160, 0.45);
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 12px rgba(0, 229, 160, 0.3);
        }

        .btn-primary:focus-visible {
            outline: 2px solid #00E5A0;
            outline-offset: 2px;
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border: 1px solid rgba(255, 255, 255, 0.3);
            border-radius: 12px;
            padding: 0.75rem 1.75rem;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s ease;
            cursor: pointer;
            font-weight: 500;
        }

        .btn-outline:hover {
            border-color: #00E5A0;
            color: #00E5A0;
            box-shadow: 0 0 20px rgba(0, 229, 160, 0.15);
        }

        .btn-outline:focus-visible {
            outline: 2px solid #00E5A0;
            outline-offset: 2px;
        }

        .card-base {
            background: var(--bg-card);
            border-radius: var(--radius-card);
            border: 1px solid var(--border-color);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, opacity 0.3s ease;
            opacity: 0;
        }

        .faq-open .faq-answer {
            max-height: 300px;
            opacity: 1;
        }

        .faq-open .faq-icon {
            transform: rotate(45deg);
        }

        .faq-icon {
            transition: transform 0.3s ease;
        }

        .neon-divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, rgba(0, 229, 160, 0.5), rgba(124, 92, 255, 0.5), transparent);
            border: none;
        }

        .guide-step::before {
            content: '';
            position: absolute;
            left: -0.5rem;
            top: 1.5rem;
            width: 1px;
            height: calc(100% + 1rem);
            background: linear-gradient(180deg, #00E5A0, #7C5CFF);
            opacity: 0.3;
        }

        .guide-step:last-child::before {
            display: none;
        }

        .input-focus:focus {
            border-color: #00E5A0;
            box-shadow: 0 0 0 3px rgba(0, 229, 160, 0.15);
        }

        @media (max-width: 1024px) {
            .hero-split {
                flex-direction: column;
            }
            .hero-visual {
                margin-top: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-desktop {
                display: none;
            }
            .nav-mobile-toggle {
                display: flex;
            }
            .hero-title {
                font-size: 2.25rem;
            }
        }

        @media (min-width: 769px) {
            .nav-mobile-toggle {
                display: none;
            }
            .nav-mobile-menu {
                display: none;
            }
        }

/* roulang page: article */
:root {
    --bg-night: #0a0e17;
    --bg-night-light: #131a29;
    --bg-night-card: #0d1421;
    --brand: #00e5a1;
    --brand-dim: rgba(0, 229, 161, 0.1);
    --accent: #a855f7;
    --accent-dim: rgba(168, 85, 247, 0.12);
    --text-primary: #f0f3f8;
    --text-secondary: #c4cad8;
    --text-muted: #8a94a8;
    --border-color: rgba(255, 255, 255, 0.08);
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
    --shadow-glow: 0 0 40px rgba(0, 229, 161, 0.12);
}

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

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-night);
    color: var(--text-primary);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }

.container-x {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.text-muted { color: var(--text-muted); }
.text-brand { color: var(--brand); }
.text-accent { color: var(--accent); }
.text-white { color: var(--text-primary); }

.bg-night-light { background-color: var(--bg-night-light); }
.bg-night-card { background-color: var(--bg-night-card); }
.border-line { border-color: var(--border-color); }

/* 导航 */
.nav-desktop { display: flex; }
.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-muted);
    padding: 0.375rem 0.25rem;
    position: relative;
    transition: color 0.25s ease;
    white-space: nowrap;
}
.nav-link:hover { color: var(--brand); }
.nav-link.active { color: var(--brand); font-weight: 600; }
.nav-link.active::after {
    content: '';
    position: absolute;
    left: 0; bottom: -4px;
    width: 100%; height: 2px;
    background: var(--brand);
    border-radius: 2px;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    background: var(--brand);
    color: #0a0e17;
    font-weight: 700;
    font-size: 0.875rem;
    border-radius: 0.75rem;
    transition: all 0.25s ease;
    border: none;
    line-height: 1;
}
.btn-primary:hover {
    background: #33eab8;
    box-shadow: 0 0 24px rgba(0, 229, 161, 0.3);
    transform: translateY(-1px);
}
.btn-primary:active {
    transform: translateY(0) scale(0.98);
}
.btn-primary:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    transition: all 0.25s ease;
    line-height: 1;
}
.btn-outline:hover {
    border-color: var(--brand);
    color: var(--brand);
    background: var(--brand-dim);
}
.btn-outline:active { transform: scale(0.98); }

.input-focus {
    outline: none;
    transition: border-color 0.2s ease;
}
.input-focus:focus {
    border-color: var(--brand) !important;
}

/* 移动端菜单按钮 */
.nav-mobile-toggle {
    display: none;
    align-items: center;
    justify-content: center;
}

/* 文章 Hero */
.article-hero {
    position: relative;
    padding-top: 6.5rem;
    padding-bottom: 3rem;
    overflow: hidden;
}
.article-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.25;
}
.article-hero-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 14, 23, 0.55), var(--bg-night) 92%);
}
.breadcrumb-link { transition: color 0.2s; }
.breadcrumb-link:hover { color: var(--brand); }

/* 分类徽章 */
.category-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--brand-dim);
    border: 1px solid rgba(0, 229, 161, 0.3);
    color: var(--brand);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.3rem 0.9rem;
    border-radius: 9999px;
}

/* 文章主体 */
.article-body-section {
    padding: 3rem 0 4rem;
}
.article-card {
    background: var(--bg-night-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}
.article-content {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.9;
    word-break: break-word;
}
.article-content h2 {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 2.2rem 0 1rem;
    letter-spacing: -0.01em;
}
.article-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 1.8rem 0 0.75rem;
}
.article-content p {
    margin: 1.1rem 0;
    line-height: 1.9;
    color: var(--text-secondary);
}
.article-content a { color: var(--brand); text-decoration: underline; text-underline-offset: 3px; }
.article-content a:hover { opacity: 0.8; }
.article-content img {
    border-radius: 1rem;
    margin: 1.5rem 0;
    width: 100%;
    height: auto;
    object-fit: cover;
    border: 1px solid var(--border-color);
}
.article-content blockquote {
    border-left: 3px solid var(--brand);
    padding: 0.75rem 1.25rem;
    background: var(--brand-dim);
    border-radius: 0 0.75rem 0.75rem 0;
    margin: 1.5rem 0;
    color: var(--text-primary);
    font-style: italic;
}
.article-content ul,
.article-content ol {
    margin: 1.2rem 0;
    padding-left: 1.5rem;
}
.article-content ul li { list-style: disc; margin: 0.4rem 0; }
.article-content ol li { list-style: decimal; margin: 0.4rem 0; }
.article-content pre {
    background: #0d1421;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1rem;
    overflow-x: auto;
    margin: 1.25rem 0;
    font-size: 0.875rem;
}
.article-content code {
    font-family: "JetBrains Mono", "Fira Code", monospace;
    color: var(--brand);
}
.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.875rem;
}
.article-content th {
    background: var(--bg-night-light);
    color: var(--text-primary);
    font-weight: 600;
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.article-content td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

/* 侧边栏 */
.sidebar-card {
    background: var(--bg-night-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    transition: transform 0.25s ease, box-shadow 0.25s ease;
}
.sidebar-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}
.sidebar-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.125rem;
    padding-bottom: 0.625rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.sidebar-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.625rem 0;
    border-bottom: 1px dashed rgba(255, 255, 255, 0.05);
    transition: border-color 0.2s;
}
.sidebar-item:last-child { border-bottom: none; }
.sidebar-item:hover { border-bottom-color: var(--brand); }
.sidebar-item-num {
    width: 1.5rem;
    height: 1.5rem;
    flex-shrink: 0;
    border-radius: 0.5rem;
    background: var(--brand-dim);
    color: var(--brand);
    font-size: 0.7rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}
.sidebar-item:nth-child(2) .sidebar-item-num,
.sidebar-item:nth-child(3) .sidebar-item-num {
    background: var(--accent-dim);
    color: var(--accent);
}

/* 标签 */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--bg-night-light);
    border: 1px solid var(--border-color);
    border-radius: 9999px;
    padding: 0.3rem 0.9rem;
    transition: all 0.2s ease;
}
.tag-chip:hover {
    color: var(--brand);
    border-color: var(--brand);
    background: var(--brand-dim);
}

/* 相关推荐 */
.related-section { padding: 4rem 0; }
.section-heading {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}
.section-sub { color: var(--text-muted); font-size: 0.95rem; }

.related-card {
    background: var(--bg-night-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.related-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4), var(--shadow-glow);
    border-color: rgba(0, 229, 161, 0.2);
}
.related-card-img { aspect-ratio: 16 / 9; overflow: hidden; position: relative; }
.related-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.45s ease; }
.related-card:hover .related-card-img img { transform: scale(1.04); }
.related-card-img::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10, 14, 23, 0) 30%, rgba(10, 14, 23, 0.75));
}
.related-card-cat {
    position: absolute;
    left: 1rem;
    top: 1rem;
    z-index: 2;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--brand);
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(6px);
    border: 1px solid rgba(0, 229, 161, 0.25);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
}
.related-card-body { padding: 1.375rem; flex: 1; display: flex; flex-direction: column; }
.related-card-title {
    font-size: 1.025rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    transition: color 0.2s;
    margin-bottom: 0.5rem;
}
.related-card:hover .related-card-title { color: var(--brand); }
.related-card-sub { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; flex: 1; }
.related-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border-color);
}

/* CTA */
.cta-section { padding: 4.5rem 0; }
.cta-card {
    background: linear-gradient(135deg, rgba(0, 229, 161, 0.08), rgba(168, 85, 247, 0.1));
    border: 1px solid rgba(0, 229, 161, 0.15);
    border-radius: 1.75rem;
    padding: 3rem 2rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-card::before {
    content: '';
    position: absolute;
    width: 260px;
    height: 260px;
    background: radial-gradient(circle, rgba(0, 229, 161, 0.18), transparent 70%);
    border-radius: 50%;
    top: -100px;
    right: -80px;
    pointer-events: none;
}
.cta-card::after {
    content: '';
    position: absolute;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(168, 85, 247, 0.16), transparent 70%);
    border-radius: 50%;
    bottom: -80px;
    left: -60px;
    pointer-events: none;
}

/* Not Found */
.not-found-box {
    text-align: center;
    padding: 3rem 1.5rem;
}
.not-found-icon {
    width: 72px;
    height: 72px;
    border-radius: 1.25rem;
    background: var(--brand-dim);
    border: 1px solid rgba(0, 229, 161, 0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.75rem;
    color: var(--brand);
}

/* 页脚 */
footer { background-color: var(--bg-night-light); }
footer a { transition: color 0.2s ease; }

/* 输入框 */
input::placeholder { color: var(--text-muted); }

/* 响应式断点 */
@media (max-width: 1024px) {
    .container-x { padding: 0 1.25rem; }
    .article-hero { padding-top: 5.5rem; padding-bottom: 2.25rem; }
}

@media (max-width: 768px) {
    .nav-desktop { display: none; }
    .nav-mobile-toggle { display: flex; }
    .article-hero { padding-top: 4.5rem; }
    .article-hero h1 { font-size: 1.75rem; line-height: 1.35; }
    .section-heading { font-size: 1.4rem; }
    .cta-card { padding: 2rem 1.25rem; }
    .article-body-section { padding: 2rem 0 3rem; }
    .related-section { padding: 3rem 0; }
    .cta-section { padding: 3rem 0; }
}

@media (max-width: 520px) {
    .container-x { padding: 0 1rem; }
    .article-hero h1 { font-size: 1.55rem; }
    .article-content { font-size: 0.95rem; }
    .article-content h2 { font-size: 1.35rem; }
    .related-card-title { font-size: 0.95rem; }
    .sidebar-card { padding: 1.125rem; }
    .cta-card h2 { font-size: 1.4rem; }
}

/* 焦点可见性 */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--brand);
    outline-offset: 2px;
    border-radius: 0.25rem;
}

/* 滚动条 */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-night); }
::-webkit-scrollbar-thumb { background: #2a3445; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #3a4a5f; }

/* roulang page: category1 */
:root {
            --brand: #f5b50a;
            --accent: #2dd4bf;
            --night: #0a0e1a;
            --night-light: #111827;
            --line: #1f2a44;
            --muted: #9ca3af;
            --radius: 1rem;
            --radius-sm: 0.5rem;
            --shadow: 0 20px 60px rgba(0, 0, 0, 0.35);
            --shadow-sm: 0 4px 20px rgba(0, 0, 0, 0.25);
            --space: 4.5rem;
            --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            margin: 0;
            font-family: var(--font-sans);
            background: var(--night);
            color: #f1f5f9;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        input {
            font-family: inherit;
        }

        .container-x {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .section-pad {
            padding-top: var(--space);
            padding-bottom: var(--space);
        }

        .nav-link {
            font-size: 0.875rem;
            font-weight: 500;
            color: var(--muted);
            transition: color 0.25s ease;
            position: relative;
            padding: 0.35rem 0.25rem;
            letter-spacing: 0.02em;
        }
        .nav-link:hover {
            color: var(--brand);
        }
        .nav-link.active {
            color: var(--brand);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 0;
            right: 0;
            bottom: 0;
            height: 2px;
            border-radius: 2px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            background: linear-gradient(135deg, var(--brand), #ffcc33);
            color: #0a0e1a;
            font-weight: 600;
            border-radius: 0.75rem;
            padding: 0.6rem 1.2rem;
            font-size: 0.875rem;
            box-shadow: 0 0 24px rgba(245, 181, 10, 0.25);
            transition: all 0.25s ease;
            border: none;
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 32px rgba(245, 181, 10, 0.4);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.4rem;
            border: 1px solid var(--line);
            color: #e2e8f0;
            background: rgba(255, 255, 255, 0.03);
            border-radius: 0.75rem;
            padding: 0.6rem 1.2rem;
            font-size: 0.875rem;
            font-weight: 500;
            transition: all 0.25s ease;
        }
        .btn-outline:hover {
            border-color: var(--accent);
            color: var(--accent);
            box-shadow: 0 0 20px rgba(45, 212, 191, 0.15);
            transform: translateY(-2px);
        }
        .btn-outline:focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
        }

        .input-focus:focus {
            outline: none;
        }

        .nav-mobile-toggle {
            display: inline-flex;
        }

        .card {
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
        }
        .card:hover {
            border-color: rgba(245, 181, 10, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow);
        }

        .card-img {
            border-radius: calc(var(--radius) - 4px) calc(var(--radius) - 4px) 0 0;
            overflow: hidden;
        }

        .badge-live {
            display: inline-flex;
            align-items: center;
            gap: 0.35rem;
            background: rgba(244, 63, 94, 0.15);
            border: 1px solid rgba(244, 63, 94, 0.4);
            color: #fb7185;
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.6rem;
            border-radius: 999px;
        }
        .badge-live::before {
            content: '';
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: #f43f5e;
            animation: pulse 1.4s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .hero-overlay {
            background: linear-gradient(100deg, rgba(10, 14, 26, 0.92) 0%, rgba(10, 14, 26, 0.72) 45%, rgba(10, 14, 26, 0.35) 100%);
        }

        .text-gradient {
            background: linear-gradient(90deg, var(--brand), #ffcc33, var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .stat-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            padding: 1.5rem 1.25rem;
            text-align: center;
            transition: all 0.3s ease;
        }
        .stat-card:hover {
            border-color: rgba(45, 212, 191, 0.4);
            transform: translateY(-3px);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
        }

        .step-line {
            position: relative;
        }
        .step-line::before {
            content: '';
            position: absolute;
            top: 2.5rem;
            left: 0;
            right: 0;
            height: 2px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            opacity: 0.2;
        }

        .faq-item {
            border: 1px solid var(--line);
            border-radius: var(--radius);
            background: rgba(255, 255, 255, 0.02);
            transition: border-color 0.3s;
            overflow: hidden;
        }
        .faq-item:hover {
            border-color: rgba(245, 181, 10, 0.3);
        }

        .accordion-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease;
        }
        .faq-item.active .accordion-content {
            max-height: 240px;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            padding: 0.35rem 0.9rem;
            border-radius: 999px;
            border: 1px solid var(--line);
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--muted);
            transition: all 0.25s;
            background: rgba(255, 255, 255, 0.02);
        }
        .tag-chip:hover {
            border-color: var(--brand);
            color: var(--brand);
        }
        .tag-chip.active {
            background: linear-gradient(135deg, var(--brand), #ffcc33);
            color: #0a0e1a;
            border-color: transparent;
            font-weight: 600;
        }

        .news-list-item {
            display: flex;
            gap: 0.75rem;
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(31, 42, 68, 0.5);
            transition: all 0.25s;
            align-items: flex-start;
        }
        .news-list-item:last-child {
            border-bottom: none;
        }
        .news-list-item:hover .title {
            color: var(--brand);
        }
        .news-list-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent);
            margin-top: 0.55rem;
            flex-shrink: 0;
        }

        .footer-link {
            transition: color 0.25s;
        }
        .footer-link:hover {
            color: var(--brand) !important;
        }

        .backdrop-blur-xl {
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
        }

        @media (min-width: 768px) {
            .nav-desktop {
                display: flex !important;
            }
            .nav-mobile-toggle {
                display: none !important;
            }
            .nav-mobile-menu {
                display: none !important;
            }
        }
        @media (max-width: 767px) {
            .nav-desktop {
                display: none !important;
            }
            .nav-mobile-toggle {
                display: inline-flex !important;
            }
            .nav-mobile-menu.open {
                display: block !important;
            }
        }

        @media (max-width: 640px) {
            :root {
                --space: 3rem;
            }
            .container-x {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .hero-title {
                font-size: 2rem !important;
                line-height: 1.25 !important;
            }
            .section-title {
                font-size: 1.4rem !important;
            }
        }

        @media (max-width: 520px) {
            .hero-stats {
                grid-template-columns: repeat(3, 1fr) !important;
                gap: 0.5rem !important;
            }
            .btn-primary {
                font-size: 0.8rem !important;
                padding: 0.5rem 0.9rem !important;
            }
        }

/* roulang page: category2 */
:root {
            --brand: #00e5a0;
            --accent: #ff3d81;
            --night: #0b0f1a;
            --night-light: #131a2b;
            --line: #2a3448;
            --muted: #8b94a7;
            --text-main: #f1f5f9;
            --radius: 16px;
            --shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            background: var(--night);
            color: var(--text-main);
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
            line-height: 1.7;
            overflow-x: hidden;
        }

        .container-x {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .nav-link {
            color: var(--muted);
            font-size: 0.9rem;
            font-weight: 500;
            padding: 0.4rem 0.2rem;
            transition: all 0.3s ease;
            position: relative;
        }

        .nav-link:hover {
            color: var(--brand);
        }

        .nav-link.active {
            color: var(--brand);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: -4px;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, var(--brand), var(--accent));
            border-radius: 2px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--brand), #00b8d9);
            color: #0b0f1a;
            font-weight: 600;
            border-radius: 12px;
            padding: 0.65rem 1.25rem;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 229, 160, 0.3);
        }

        .btn-primary:focus,
        .nav-mobile-toggle:focus,
        .input-focus:focus {
            outline: 2px solid rgba(0, 229, 160, 0.6);
            outline-offset: 2px;
        }

        .btn-accent {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--accent), #f76b8a);
            color: #fff;
            font-weight: 600;
            border-radius: 12px;
            padding: 0.65rem 1.25rem;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 61, 129, 0.35);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: transparent;
            color: var(--text-main);
            font-weight: 500;
            border: 1px solid var(--line);
            border-radius: 12px;
            padding: 0.65rem 1.25rem;
            font-size: 0.9rem;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .btn-outline:hover {
            border-color: var(--brand);
            color: var(--brand);
            background: rgba(0, 229, 160, 0.08);
        }

        .card-glass {
            background: rgba(19, 26, 43, 0.7);
            border: 1px solid var(--line);
            border-radius: var(--radius);
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .card-glass:hover {
            border-color: rgba(0, 229, 160, 0.4);
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
            transform: translateY(-4px);
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 0.25rem;
            background: rgba(0, 229, 160, 0.12);
            color: var(--brand);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 9999px;
            border: 1px solid rgba(0, 229, 160, 0.25);
        }

        .badge-hot {
            background: rgba(255, 61, 129, 0.12);
            color: var(--accent);
            border-color: rgba(255, 61, 129, 0.25);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 700;
            line-height: 1.3;
            letter-spacing: -0.02em;
        }

        .section-subtitle {
            color: var(--muted);
            font-size: 0.95rem;
        }

        .faq-item {
            background: rgba(19, 26, 43, 0.5);
            border: 1px solid var(--line);
            border-radius: 12px;
            transition: border-color 0.3s ease;
        }

        .faq-item:hover {
            border-color: rgba(0, 229, 160, 0.3);
        }

        .faq-question {
            cursor: pointer;
            user-select: none;
        }

        .faq-question i {
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-question i {
            transform: rotate(45deg);
        }

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

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .hero-bg {
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .hero-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 15, 26, 0.92) 30%, rgba(11, 15, 26, 0.55) 70%, rgba(11, 15, 26, 0.85) 100%);
            z-index: 1;
        }

        .hero-bg > * {
            position: relative;
            z-index: 2;
        }

        .banner-bg {
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .banner-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(11, 15, 26, 0.94) 20%, rgba(11, 15, 26, 0.7) 100%);
            z-index: 1;
        }

        .banner-bg > * {
            position: relative;
            z-index: 2;
        }

        .stat-card {
            border-radius: 14px;
            background: rgba(19, 26, 43, 0.8);
            border: 1px solid var(--line);
            padding: 1.25rem;
            text-align: center;
            transition: all 0.3s ease;
        }

        .stat-card:hover {
            border-color: rgba(0, 229, 160, 0.4);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
        }

        .stat-value {
            font-size: 1.75rem;
            font-weight: 700;
            background: linear-gradient(90deg, var(--brand), #00d4ff);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .post-tag {
            display: inline-block;
            font-size: 0.68rem;
            padding: 0.15rem 0.55rem;
            border-radius: 4px;
            background: rgba(255, 61, 129, 0.12);
            color: var(--accent);
            border: 1px solid rgba(255, 61, 129, 0.2);
            margin-bottom: 0.4rem;
        }

        .timeline-dot {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--brand);
            box-shadow: 0 0 12px rgba(0, 229, 160, 0.6);
            flex-shrink: 0;
        }

        .nav-mobile-toggle {
            display: none;
        }

        @media (max-width: 1024px) {
            .nav-desktop {
                display: none;
            }
            .nav-mobile-toggle {
                display: inline-flex;
            }
            .section-title {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            .container-x {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .stat-value {
                font-size: 1.4rem;
            }
        }

        @media (max-width: 520px) {
            .section-title {
                font-size: 1.3rem;
            }
            .btn-primary,
            .btn-accent {
                width: 100%;
                justify-content: center;
            }
            .hero-actions {
                flex-direction: column;
                align-items: stretch;
            }
        }

        @keyframes float {
            0%, 100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
        }

        .float-animation {
            animation: float 4s ease-in-out infinite;
        }

        .bracket-line {
            border-left: 2px solid var(--line);
            position: relative;
        }

        .bracket-line::before {
            content: '';
            position: absolute;
            left: -2px;
            top: 0;
            width: 2px;
            height: 100%;
            background: linear-gradient(180deg, var(--brand), transparent);
        }

        .text-glow {
            text-shadow: 0 0 20px rgba(0, 229, 160, 0.3);
        }