/* roulang page: index */
:root {
    --bg-primary: #0B1220;
    --bg-secondary: #0F172A;
    --accent: #3B82F6;
    --accent-light: #60A5FA;
    --accent-dark: #2563EB;
    --success: #34D399;
    --warning: #F59E0B;
    --text-primary: #E2E8F0;
    --text-secondary: #94A3B8;
    --text-muted: rgba(148,163,184,0.7);
    --glass-bg: rgba(255,255,255,0.06);
    --glass-border: rgba(255,255,255,0.12);
    --neon-glow: rgba(59,130,246,0.4);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
  }
  html { scroll-behavior: smooth; }
  body {
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: var(--font-cn);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  ::selection { background: rgba(59,130,246,0.3); }
  .container-custom {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 24px;
    padding-right: 24px;
  }
  @media (max-width: 640px) {
    .container-custom { padding-left: 16px; padding-right: 16px; }
  }
  /* ---- Header Nav ---- */
  .site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(11,18,32,0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 1.2rem;
    color: #F1F5F9;
    letter-spacing: 0.01em;
    white-space: nowrap;
  }
  .nav-logo .logo-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #3B82F6, #2563EB);
    border-radius: 10px;
    color: #fff;
    font-weight: 900;
    font-size: 1.1rem;
    box-shadow: 0 0 18px rgba(59,130,246,0.35);
    flex-shrink: 0;
  }
  .nav-search {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 9999px;
    padding: 6px 16px;
    min-width: 200px;
    transition: border-color 0.3s, box-shadow 0.3s;
  }
  .nav-search:focus-within {
    border-color: rgba(96,165,250,0.5);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
  }
  .nav-search input {
    background: transparent;
    border: none;
    outline: none;
    color: #E2E8F0;
    font-size: 0.9rem;
    width: 100%;
  }
  .nav-search input::placeholder { color: rgba(148,163,184,0.7); }
  .nav-search button {
    background: transparent;
    border: none;
    color: rgba(148,163,184,0.8);
    cursor: pointer;
    padding: 2px 4px;
    transition: color 0.2s;
  }
  .nav-search button:hover { color: #60A5FA; }
  .channel-tabs {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
    padding: 8px 0;
    white-space: nowrap;
  }
  .channel-tabs::-webkit-scrollbar { display: none; }
  .channel-tab {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    border-radius: 9999px;
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(203,213,225,0.75);
    background: transparent;
    border: 1px solid transparent;
    transition: all 0.3s ease;
    text-decoration: none;
  }
  .channel-tab:hover {
    background: rgba(255,255,255,0.05);
    color: #E2E8F0;
  }
  .channel-tab.active {
    background: rgba(59,130,246,0.15);
    border-color: rgba(59,130,246,0.5);
    color: #60A5FA;
    font-weight: 600;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: linear-gradient(135deg, #3B82F6, #2563EB);
    color: #fff;
    border: none;
    border-radius: 9999px;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 0 24px rgba(59,130,246,0.4);
    transition: box-shadow 0.3s, transform 0.2s, opacity 0.2s;
    text-decoration: none;
    line-height: 1.4;
  }
  .btn-primary:hover {
    box-shadow: 0 0 40px rgba(96,165,250,0.6);
    transform: translateY(-2px);
    color: #fff;
  }
  .btn-primary:active { transform: translateY(0) scale(0.98); }
  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    background: transparent;
    color: #E2E8F0;
    border: 1px solid rgba(255,255,255,0.35);
    border-radius: 9999px;
    padding: 14px 32px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.3s, border-color 0.3s;
    text-decoration: none;
    line-height: 1.4;
  }
  .btn-secondary:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.6);
    color: #fff;
  }
  /* ---- Hero ---- */
  .hero-section {
    position: relative;
    min-height: 85vh;
    display: flex;
    align-items: center;
    background:
      radial-gradient(ellipse 60% 50% at 20% 20%, rgba(59,130,246,0.25), transparent 60%),
      radial-gradient(ellipse 50% 40% at 85% 80%, rgba(52,211,153,0.12), transparent 60%),
      linear-gradient(180deg, #0B1220 0%, #0F172A 100%);
    overflow: hidden;
  }
  .hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cpath d='M0 0h80v80H0z' fill='none' stroke='rgba(148,163,184,0.06)' stroke-width='1'/%3E%3C/svg%3E");
    pointer-events: none;
  }
  .hero-glow-left {
    position: absolute;
    top: 10%;
    left: -5%;
    width: 350px;
    height: 350px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(59,130,246,0.18), transparent 70%);
    filter: blur(40px);
    animation: floatingGlow 8s ease-in-out infinite;
  }
  .hero-glow-right {
    position: absolute;
    bottom: 10%;
    right: -5%;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(52,211,153,0.12), transparent 70%);
    filter: blur(40px);
    animation: floatingGlow 10s ease-in-out infinite reverse;
  }
  @keyframes floatingGlow {
    0%, 100% { transform: translateY(0) scale(1); opacity: 0.7; }
    50% { transform: translateY(-20px) scale(1.05); opacity: 1; }
  }
  .hero-content { position: relative; z-index: 2; }
  .hero-subtitle {
    font-size: 1.1rem;
    color: rgba(203,213,225,0.85);
    max-width: 560px;
    line-height: 1.8;
  }
  .hero-trust {
    font-size: 0.82rem;
    color: rgba(148,163,184,0.7);
  }
  .hero-trust i { color: #34D399; }
  /* Status card */
  .status-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.14);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-radius: 24px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.35);
    padding: 24px;
    animation: fadeUp 0.8s ease-out;
  }
  .status-dot {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #34D399;
    box-shadow: 0 0 12px rgba(52,211,153,0.6);
    margin-right: 6px;
  }
  .status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 0;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    font-size: 0.9rem;
  }
  .status-row:last-child { border-bottom: none; }
  .status-label { color: rgba(148,163,184,0.85); }
  .status-value { color: #E2E8F0; font-weight: 600; }
  @keyframes pulseRing {
    0% { box-shadow: 0 0 0 0 rgba(59,130,246,0.5); }
    70% { box-shadow: 0 0 0 12px rgba(59,130,246,0); }
    100% { box-shadow: 0 0 0 0 rgba(59,130,246,0); }
  }
  .btn-pulse { animation: pulseRing 2.5s infinite; }
  /* ---- Section styles ---- */
  .section-pad { padding: 96px 0; }
  @media (max-width: 768px) {
    .section-pad { padding: 56px 0; }
  }
  .section-title-wrap {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 48px;
  }
  .section-title-bar {
    width: 4px;
    height: 28px;
    background: linear-gradient(180deg, #3B82F6, #2563EB);
    border-radius: 2px;
  }
  .section-title {
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    letter-spacing: 0.02em;
    color: #F1F5F9;
    margin: 0;
  }
  /* Glass card */
  .glass-card {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.35);
    padding: 28px;
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
  }
  .glass-card:hover {
    transform: translateY(-4px);
    border-color: rgba(96,165,250,0.5);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
  }
  .icon-box {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 12px;
    background: rgba(59,130,246,0.12);
    border: 1px solid rgba(59,130,246,0.25);
    color: #60A5FA;
    font-size: 1.2rem;
    transition: all 0.3s;
  }
  .glass-card:hover .icon-box {
    box-shadow: 0 0 20px rgba(59,130,246,0.3);
  }
  /* Data metrics */
  .metric-num {
    font-size: 3rem;
    font-weight: 800;
    color: #34D399;
    text-shadow: 0 0 20px rgba(52,211,153,0.3);
    line-height: 1.2;
  }
  .metric-label {
    font-size: 0.875rem;
    color: rgba(148,163,184,0.8);
    margin-top: 6px;
  }
  /* Testimonial */
  .testimonial-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 16px;
    padding: 24px;
  }
  .testimonial-card:hover { border-color: rgba(96,165,250,0.4); }
  .testimonial-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, #1E293B, #334155);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #94A3B8;
    font-size: 0.9rem;
    font-weight: 700;
    flex-shrink: 0;
  }
  /* News list */
  .news-card {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 24px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.07);
    border-radius: 16px;
    padding: 20px;
    transition: all 0.3s ease;
  }
  .news-card:hover {
    border-color: rgba(96,165,250,0.4);
    background: rgba(255,255,255,0.06);
    transform: translateY(-2px);
  }
  .news-card .news-cover {
    width: 100%;
    height: 140px;
    border-radius: 12px;
    object-fit: cover;
    overflow: hidden;
  }
  .news-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 500;
    background: rgba(245,158,11,0.15);
    color: #F59E0B;
    border: 1px solid rgba(245,158,11,0.3);
  }
  .news-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #E2E8F0;
    margin: 8px 0;
    line-height: 1.4;
  }
  .news-title a { color: inherit; text-decoration: none; transition: color 0.2s; }
  .news-title a:hover { color: #60A5FA; }
  .news-summary {
    font-size: 0.9rem;
    color: rgba(148,163,184,0.8);
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 12px;
  }
  .news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.82rem;
    color: rgba(148,163,184,0.6);
  }
  .news-meta .read-more {
    color: #60A5FA;
    text-decoration: none;
    font-weight: 500;
    transition: text-decoration 0.2s;
  }
  .news-meta .read-more:hover { text-decoration: underline; }
  .empty-state {
    border: 1px dashed rgba(148,163,184,0.3);
    border-radius: 16px;
    padding: 48px;
    text-align: center;
    color: rgba(148,163,184,0.6);
    background: rgba(255,255,255,0.02);
  }
  /* FAQ */
  .faq-item {
    border-bottom: 1px solid rgba(255,255,255,0.08);
  }
  .faq-item:last-child { border-bottom: none; }
  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    background: transparent;
    border: none;
    padding: 20px 0;
    font-size: 1rem;
    font-weight: 600;
    color: #E2E8F0;
    cursor: pointer;
    text-align: left;
    transition: color 0.2s;
  }
  .faq-question .faq-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    background: #F59E0B;
    border-radius: 50%;
    margin-right: 12px;
    flex-shrink: 0;
  }
  .faq-question .faq-icon {
    transition: transform 0.3s;
    color: #60A5FA;
    font-size: 1.2rem;
    flex-shrink: 0;
    margin-left: 16px;
  }
  .faq-item.open .faq-icon { transform: rotate(45deg); }
  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s;
    font-size: 0.9rem;
    line-height: 1.7;
    color: rgba(148,163,184,0.9);
    padding: 0;
  }
  .faq-item.open .faq-answer {
    max-height: 300px;
    padding-bottom: 20px;
  }
  /* CTA */
  .cta-section {
    background: linear-gradient(135deg, #0B1220, #1E3A8A 50%, #3B82F6);
    position: relative;
    overflow: hidden;
  }
  .cta-section::before {
    content: '';
    position: absolute;
    top: -50%;
    left: 20%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.08), transparent 70%);
    border-radius: 50%;
  }
  .trust-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: rgba(226,232,240,0.6);
  }
  .trust-badge i { color: #34D399; }
  /* Footer */
  .footer {
    background: #060C18;
    border-top: 1px solid rgba(255,255,255,0.05);
  }
  .footer h5 {
    color: #94A3B8;
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 16px;
  }
  .footer a {
    color: rgba(148,163,184,0.7);
    font-size: 0.9rem;
    text-decoration: none;
    transition: color 0.2s;
    display: block;
    padding: 4px 0;
  }
  .footer a:hover { color: #60A5FA; }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.05);
    padding: 20px 0;
    font-size: 0.8rem;
    color: rgba(148,163,184,0.5);
  }
  /* Fade up animation */
  @keyframes fadeUp {
    from { opacity: 0; transform: translateY(24px); }
    to { opacity: 1; transform: translateY(0); }
  }
  .fade-up { animation: fadeUp 0.8s ease-out both; }
  .fade-up-delay-1 { animation-delay: 0.1s; }
  .fade-up-delay-2 { animation-delay: 0.2s; }
  .fade-up-delay-3 { animation-delay: 0.3s; }
  /* Responsive news card */
  @media (max-width: 640px) {
    .news-card {
      grid-template-columns: 1fr;
      gap: 12px;
    }
    .news-card .news-cover { height: 160px; }
    .btn-primary, .btn-secondary { width: 100%; }
  }
  @media (max-width: 768px) {
    .hero-section { min-height: auto; padding: 80px 0; }
    .section-title { font-size: 1.4rem; }
  }
  /* Process steps */
  .step-item {
    position: relative;
    padding-left: 32px;
  }
  .step-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: #3B82F6;
    box-shadow: 0 0 12px rgba(59,130,246,0.5);
  }
  .step-item::after {
    content: '';
    position: absolute;
    left: 5px;
    top: 24px;
    bottom: -20px;
    width: 2px;
    background: rgba(59,130,246,0.2);
  }
  .step-item:last-child::after { display: none; }
  /* general link */
  .text-link {
    color: #60A5FA;
    text-decoration: none;
    font-weight: 500;
    transition: text-decoration 0.2s;
  }
  .text-link:hover { text-decoration: underline; }
  /* Focus visibility */
  a:focus, button:focus, input:focus, .channel-tab:focus {
    outline: 2px solid rgba(96,165,250,0.6);
    outline-offset: 2px;
  }

/* roulang page: article */
:root {
            --bg-primary: #0B1220;
            --bg-secondary: #0F172A;
            --bg-deep: #060C18;
            --accent: #3B82F6;
            --accent-light: #60A5FA;
            --success: #34D399;
            --warn: #F59E0B;
            --neon-glow: rgba(59, 130, 246, .4);
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-light: rgba(255, 255, 255, 0.08);
            --border-accent: rgba(96, 165, 250, 0.5);
            --glass-bg: rgba(255, 255, 255, 0.06);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
        }

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

        html {
            scroll-behavior: smooth;
        }

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

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

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

        button,
        input {
            font-family: inherit;
        }

        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ===== Header ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(11, 18, 32, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-light);
        }

        .logo-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            color: #fff;
            font-size: 1.25rem;
            font-weight: 800;
            box-shadow: 0 0 24px var(--neon-glow);
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: var(--bg-secondary);
            border: 1px solid var(--border-light);
            border-radius: 9999px;
            padding: 6px 6px 6px 20px;
            transition: border-color .3s ease, box-shadow .3s ease;
            flex: 1;
            max-width: 420px;
        }

        .search-box:focus-within {
            border-color: var(--accent);
            box-shadow: 0 0 16px var(--neon-glow);
        }

        .search-box input {
            background: transparent;
            border: none;
            outline: none;
            color: var(--text-primary);
            font-size: .875rem;
            width: 100%;
        }

        .search-box input::placeholder {
            color: var(--text-muted);
        }

        .search-btn {
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            border: none;
            color: #fff;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .75rem;
            transition: box-shadow .3s ease;
            flex-shrink: 0;
        }

        .search-btn:hover {
            box-shadow: 0 0 20px var(--neon-glow);
        }

        .btn-login {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 24px;
            border-radius: 9999px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            font-size: .875rem;
            font-weight: 600;
            transition: all .3s ease;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: var(--accent-light);
            color: #fff;
        }

        /* Channel tabs */
        .channel-tabs {
            display: flex;
            gap: 8px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            padding: 4px 0 8px;
        }

        .channel-tabs::-webkit-scrollbar {
            display: none;
        }

        .channel-tab {
            flex-shrink: 0;
            padding: 8px 20px;
            border-radius: 9999px;
            font-size: .875rem;
            color: var(--text-secondary);
            white-space: nowrap;
            transition: all .3s ease;
            border: 1px solid transparent;
        }

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

        .channel-tab.active {
            background: rgba(59, 130, 246, 0.15);
            border-color: rgba(96, 165, 250, 0.4);
            color: var(--accent-light);
            font-weight: 600;
        }

        /* ===== Article Hero ===== */
        .article-hero {
            position: relative;
            background: linear-gradient(135deg, rgba(11, 18, 32, 0.94), rgba(15, 23, 42, 0.88)), url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            border-bottom: 1px solid var(--border-light);
            padding: 56px 0 44px;
        }

        .article-hero::after {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 480px;
            height: 480px;
            background: radial-gradient(circle, rgba(96, 165, 250, 0.18), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 6px;
            font-size: .8rem;
            color: var(--text-muted);
            position: relative;
            z-index: 2;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            transition: color .3s ease;
        }

        .breadcrumb a:hover {
            color: var(--accent-light);
        }

        .badge-category {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 9999px;
            background: rgba(245, 158, 11, 0.15);
            border: 1px solid rgba(245, 158, 11, 0.3);
            color: #F59E0B;
            font-size: .75rem;
            font-weight: 600;
            position: relative;
            z-index: 2;
        }

        .article-title {
            font-size: clamp(1.8rem, 3.5vw, 2.2rem);
            font-weight: 800;
            line-height: 1.3;
            margin: 16px 0 14px;
            color: #F8FAFC;
            position: relative;
            z-index: 2;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            font-size: .85rem;
            color: var(--text-secondary);
            position: relative;
            z-index: 2;
        }

        .article-meta i {
            margin-right: 6px;
            color: var(--accent-light);
        }

        .article-meta .meta-divider {
            width: 1px;
            height: 14px;
            background: var(--border-light);
        }

        /* ===== Article Body ===== */
        .article-section {
            padding: 56px 0 64px;
        }

        .article-body {
            max-width: 720px;
            margin: 0 auto;
            font-size: 1rem;
            line-height: 1.8;
            color: #CBD5E1;
            word-break: break-word;
        }

        .article-body p {
            margin-bottom: 1.5em;
        }

        .article-body h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin: 2em 0 .8em;
            color: #F1F5F9;
            position: relative;
            padding-left: 16px;
        }

        .article-body h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 2px;
            background: linear-gradient(to bottom, #3B82F6, #34D399);
        }

        .article-body h3 {
            font-size: 1.2rem;
            font-weight: 600;
            margin: 1.8em 0 .6em;
            color: #E2E8F0;
        }

        .article-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 1.4em 0 .5em;
            color: #E2E8F0;
        }

        .article-body img {
            display: block;
            border-radius: 12px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.35);
            margin: 1.5em auto;
        }

        .article-body blockquote {
            border-left: 4px solid var(--accent);
            background: rgba(59, 130, 246, 0.08);
            padding: 16px 20px;
            border-radius: 0 12px 12px 0;
            margin: 1.5em 0;
            color: #94A3B8;
            font-style: italic;
        }

        .article-body ul,
        .article-body ol {
            padding-left: 1.5em;
            margin-bottom: 1.5em;
        }

        .article-body ul li,
        .article-body ol li {
            margin-bottom: .5em;
        }

        .article-body ul li::marker {
            color: var(--accent-light);
        }

        .article-body a {
            color: var(--accent-light);
            border-bottom: 1px solid rgba(96, 165, 250, 0.3);
            transition: border-color .3s ease;
        }

        .article-body a:hover {
            border-bottom-color: var(--accent-light);
        }

        .article-body code {
            background: #1E293B;
            color: #93C5FD;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: .875em;
        }

        .article-body pre {
            background: #0F1B33;
            border: 1px solid var(--border-light);
            border-radius: 12px;
            padding: 20px;
            overflow-x: auto;
            margin: 1.5em 0;
            line-height: 1.6;
        }

        .article-body pre code {
            background: transparent;
            padding: 0;
            color: #E2E8F0;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.5em 0;
            font-size: .9rem;
        }

        .article-body th {
            background: rgba(59, 130, 246, 0.1);
            color: #E2E8F0;
            font-weight: 600;
            padding: 10px 14px;
            text-align: left;
            border: 1px solid var(--border-light);
        }

        .article-body td {
            padding: 10px 14px;
            border: 1px solid var(--border-light);
            color: #CBD5E1;
        }

        .article-body hr {
            border: none;
            border-top: 1px solid var(--border-light);
            margin: 2em 0;
        }

        /* Tags */
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            max-width: 720px;
            margin: 36px auto 0;
        }

        .tag {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 9999px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid var(--border-light);
            color: var(--text-secondary);
            font-size: .8rem;
            transition: all .3s ease;
        }

        .tag:hover {
            color: var(--accent-light);
            border-color: var(--accent);
            background: rgba(59, 130, 246, 0.1);
        }

        /* Prev / Next */
        .article-prevnext {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            max-width: 720px;
            margin: 36px auto 0;
            padding-top: 24px;
            border-top: 1px solid var(--border-light);
        }

        .article-prevnext a {
            color: var(--text-secondary);
            font-size: .875rem;
            transition: all .3s ease;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            max-width: 48%;
        }

        .article-prevnext a:hover {
            color: var(--accent-light);
        }

        .article-prevnext .next-link {
            text-align: right;
            justify-content: flex-end;
        }

        /* Back home */
        .back-home {
            text-align: center;
            margin-top: 36px;
        }

        .back-home a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: var(--accent-light);
            font-size: .875rem;
            padding: 10px 24px;
            border-radius: 9999px;
            border: 1px solid rgba(96, 165, 250, 0.3);
            transition: all .3s ease;
        }

        .back-home a:hover {
            background: rgba(59, 130, 246, 0.1);
            border-color: var(--accent);
            transform: translateY(-1px);
        }

        /* Not found */
        .not-found {
            text-align: center;
            padding: 72px 24px;
            max-width: 520px;
            margin: 0 auto;
        }

        .not-found .nf-icon {
            font-size: 3rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .not-found h1 {
            font-size: 1.5rem;
            font-weight: 700;
            color: #E2E8F0;
            margin-bottom: 12px;
        }

        .not-found p {
            font-size: .95rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
        }

        /* ===== Related ===== */
        .related-section {
            background: var(--bg-secondary);
            padding: 72px 0;
            border-top: 1px solid var(--border-light);
        }

        .section-title {
            font-size: clamp(1.4rem, 2vw, 1.8rem);
            font-weight: 700;
            margin-bottom: 32px;
            position: relative;
            padding-left: 16px;
        }

        .section-title::before {
            content: '';
            position: absolute;
            left: 0;
            top: 6px;
            bottom: 6px;
            width: 4px;
            border-radius: 2px;
            background: linear-gradient(to bottom, #3B82F6, #34D399);
        }

        .related-card {
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border-light);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .related-card:hover {
            transform: translateY(-4px);
            border-color: var(--border-accent);
            box-shadow: 0 16px 40px rgba(0, 0, 0, 0.4);
        }

        .related-card .card-img {
            width: 100%;
            height: 180px;
            object-fit: cover;
            display: block;
        }

        .related-card .card-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex: 1;
        }

        .related-card h3 {
            font-size: 1rem;
            font-weight: 600;
            color: #E2E8F0;
            line-height: 1.5;
            transition: color .3s ease;
        }

        .related-card:hover h3 {
            color: var(--accent-light);
        }

        .related-card .card-date {
            font-size: .8rem;
            color: var(--text-muted);
            margin-top: auto;
        }

        .badge-blue {
            display: inline-block;
            padding: 3px 12px;
            border-radius: 9999px;
            background: rgba(59, 130, 246, 0.15);
            border: 1px solid rgba(59, 130, 246, 0.3);
            color: var(--accent-light);
            font-size: .7rem;
            font-weight: 600;
            align-self: flex-start;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: linear-gradient(135deg, #0F172A 0%, #1D4ED8 100%);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(96, 165, 250, 0.3), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -60%;
            left: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(52, 211, 153, 0.2), transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .cta-section h2 {
            font-size: clamp(1.5rem, 2.5vw, 2rem);
            font-weight: 800;
            color: #FFF;
        }

        .cta-section p {
            color: rgba(226, 232, 240, 0.8);
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 14px 36px;
            border-radius: 9999px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            color: #fff;
            font-weight: 600;
            font-size: .95rem;
            box-shadow: 0 0 24px var(--neon-glow);
            transition: all .3s ease;
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(96, 165, 250, 0.6);
            transform: translateY(-2px);
        }

        .trust-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .75rem;
            color: rgba(226, 232, 240, 0.6);
            padding: 6px 14px;
            border-radius: 9999px;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        /* ===== Footer ===== */
        .footer {
            background: var(--bg-deep);
            border-top: 1px solid var(--border-light);
        }

        .footer h5 {
            color: #CBD5E1;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }

        .footer a {
            display: block;
            color: var(--text-secondary);
            font-size: .875rem;
            margin-bottom: 10px;
            transition: color .3s ease;
        }

        .footer a:hover {
            color: var(--accent-light);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-light);
            padding: 20px 0;
            font-size: .8rem;
            color: var(--text-muted);
        }

        /* ===== Responsive ===== */
        @media (max-width: 767px) {
            .container-custom {
                padding-left: 16px;
                padding-right: 16px;
            }

            .article-hero {
                padding: 36px 0 28px;
            }

            .article-title {
                font-size: 1.5rem;
            }

            .article-meta {
                gap: 12px;
                font-size: .8rem;
            }

            .article-section {
                padding: 40px 0 48px;
            }

            .article-body {
                font-size: .95rem;
            }

            .related-section {
                padding: 48px 0;
            }

            .cta-section {
                padding: 48px 0;
            }

            .article-prevnext a {
                max-width: 100%;
                width: 100%;
            }

            .article-prevnext .next-link {
                text-align: left;
                justify-content: flex-start;
            }
        }

        @media (max-width: 520px) {
            .header-top {
                gap: 12px;
            }

            .btn-login {
                padding: 6px 16px;
                font-size: .8rem;
            }

            .logo-mark {
                width: 34px;
                height: 34px;
                font-size: 1rem;
            }

            .channel-tab {
                padding: 6px 16px;
                font-size: .8rem;
            }
        }

/* roulang page: category1 */
:root {
  --bg-primary: #0B1220;
  --bg-secondary: #0F172A;
  --accent: #3B82F6;
  --accent-light: #60A5FA;
  --accent-glow: rgba(59, 130, 246, .4);
  --success: #34D399;
  --warning: #F59E0B;
  --text-primary: #E2E8F0;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --border-glass: rgba(255, 255, 255, .08);
  --glass-fill: rgba(255, 255, 255, .06);
  --radius-lg: 24px;
  --radius-md: 16px;
  --shadow-card: 0 8px 32px rgba(0, 0, 0, .35);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-family); background: var(--bg-primary); color: var(--text-primary); line-height: 1.7; font-size: 16px; -webkit-font-smoothing: antialiased; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; }
input { font-family: inherit; }
.container-custom { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* ===== Header ===== */
.site-header {
  background: rgba(11, 18, 32, .92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(255, 255, 255, .06);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-top { display: flex; align-items: center; justify-content: space-between; padding: 16px 0 10px; gap: 16px; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 1.25rem; color: #F8FAFC; white-space: nowrap; }
.logo-mark {
  width: 36px; height: 36px; border-radius: 10px;
  background: linear-gradient(135deg, #3B82F6, #2563EB);
  display: flex; align-items: center; justify-content: center;
  font-weight: 900; color: #fff;
  box-shadow: 0 0 18px rgba(59, 130, 246, .5);
}
.search-bar {
  flex: 1; max-width: 420px; margin: 0 auto;
  display: flex; align-items: center; gap: 10px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .1);
  border-radius: 9999px; padding: 8px 18px;
  transition: border-color .3s, box-shadow .3s;
}
.search-bar:focus-within { border-color: var(--accent); box-shadow: 0 0 12px rgba(59, 130, 246, .25); }
.search-bar i { color: var(--text-muted); font-size: .9rem; }
.search-bar input { flex: 1; background: transparent; border: none; outline: none; color: var(--text-primary); font-size: .9rem; min-width: 0; }
.search-bar input::placeholder { color: var(--text-muted); }
.search-bar button { background: transparent; border: none; color: var(--text-secondary); font-size: .8rem; font-weight: 600; transition: color .3s; }
.search-bar button:hover { color: var(--accent-light); }
.btn-login {
  padding: 8px 22px; border-radius: 9999px;
  background: transparent; border: 1px solid rgba(255, 255, 255, .2);
  color: var(--text-primary); font-size: .9rem; font-weight: 600;
  transition: all .3s; white-space: nowrap;
}
.btn-login:hover { background: rgba(255, 255, 255, .08); border-color: rgba(96, 165, 250, .5); }

.channel-tabs { display: flex; gap: 8px; padding: 0 0 14px; overflow-x: auto; scrollbar-width: none; }
.channel-tabs::-webkit-scrollbar { display: none; }
.channel-tab {
  padding: 8px 20px; border-radius: 9999px;
  font-size: .9rem; font-weight: 500; color: var(--text-secondary);
  background: transparent; border: 1px solid transparent;
  white-space: nowrap; transition: all .3s;
}
.channel-tab:hover { background: rgba(255, 255, 255, .05); color: var(--text-primary); }
.channel-tab.active { background: rgba(59, 130, 246, .15); border-color: rgba(59, 130, 246, .4); color: var(--accent-light); }

/* ===== Hero ===== */
.hero {
  position: relative; padding: 88px 0 80px; overflow: hidden;
  background:
    linear-gradient(rgba(11, 18, 32, .92), rgba(11, 18, 32, .78)),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
}
.hero::before {
  content: ''; position: absolute; top: -20%; left: -10%;
  width: 60%; height: 60%;
  background: radial-gradient(circle, rgba(59, 130, 246, .22), transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; bottom: -20%; right: -10%;
  width: 50%; height: 50%;
  background: radial-gradient(circle, rgba(52, 211, 153, .14), transparent 70%);
  pointer-events: none;
}
.hero .container-custom { position: relative; z-index: 2; }
.hero-grid { display: grid; grid-template-columns: 1.25fr .75fr; gap: 56px; align-items: center; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 9999px;
  background: rgba(59, 130, 246, .12); border: 1px solid rgba(59, 130, 246, .3);
  color: var(--accent-light); font-size: .85rem; font-weight: 600; margin-bottom: 20px;
}
.hero-title { font-size: clamp(2.2rem, 4vw, 3.5rem); font-weight: 800; line-height: 1.2; margin-bottom: 20px; color: #F8FAFC; }
.hero-subtitle { font-size: 1.05rem; color: var(--text-secondary); line-height: 1.8; max-width: 560px; margin-bottom: 28px; }
.btn-primary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 9999px;
  background: linear-gradient(135deg, #3B82F6, #2563EB);
  color: #fff; font-weight: 600; font-size: .95rem;
  box-shadow: 0 0 24px rgba(59, 130, 246, .4);
  transition: all .3s;
}
.btn-primary:hover { box-shadow: 0 0 40px rgba(96, 165, 250, .6); transform: translateY(-2px); }
.btn-secondary {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 28px; border-radius: 9999px;
  background: transparent; border: 1px solid rgba(255, 255, 255, .25);
  color: var(--text-primary); font-weight: 600; font-size: .95rem;
  transition: all .3s;
}
.btn-secondary:hover { background: rgba(255, 255, 255, .08); border-color: rgba(96, 165, 250, .5); }
.btn-group { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 32px; }
.trust-row { display: flex; flex-wrap: wrap; gap: 20px; }
.trust-pill { display: flex; align-items: center; gap: 8px; color: var(--text-muted); font-size: .85rem; }
.trust-pill i { color: var(--success); }

.glass-card {
  background: var(--glass-fill);
  border: 1px solid var(--border-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--shadow-card);
}
.status-row { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; border-bottom: 1px solid rgba(255, 255, 255, .06); }
.status-row:last-child { border-bottom: none; }
.status-label { color: var(--text-secondary); font-size: .85rem; }
.status-value { color: #F8FAFC; font-weight: 600; font-size: .9rem; display: flex; align-items: center; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); box-shadow: 0 0 8px var(--success); }

/* ===== Section ===== */
.section { padding: 96px 0; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; letter-spacing: .02em; margin-bottom: 16px; color: #F8FAFC; }
.section-head { margin-bottom: 48px; }
.section-head.left-border { border-left: 3px solid var(--accent); padding-left: 16px; }
.section-desc { color: var(--text-secondary); max-width: 680px; }

/* ===== Feature ===== */
.feature-list { display: flex; flex-direction: column; gap: 48px; }
.feature-row { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.feature-icon {
  width: 64px; height: 64px; border-radius: 16px;
  background: rgba(255, 255, 255, .06); border: 1px solid rgba(255, 255, 255, .1);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; color: var(--accent-light);
  transition: all .3s;
}
.feature-card:hover .feature-icon { box-shadow: 0 0 24px rgba(59, 130, 246, .35); }
.feature-media img { border-radius: 16px; box-shadow: 0 8px 32px rgba(0, 0, 0, .3); }
.feature-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; color: #F8FAFC; }
.feature-desc { color: var(--text-secondary); font-size: .95rem; line-height: 1.75; }
.feature-link { color: var(--accent-light); font-size: .9rem; font-weight: 600; transition: all .3s; }
.feature-link:hover { text-decoration: underline; }

/* ===== Metrics ===== */
.metrics-card {
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .08);
  border-radius: 24px; padding: 40px;
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}
.metric-value { font-size: clamp(2rem, 3vw, 3rem); font-weight: 800; color: var(--success); text-shadow: 0 0 24px rgba(52, 211, 153, .35); }
.metric-label { color: var(--text-secondary); font-size: .875rem; margin-top: 6px; }

/* ===== Topics ===== */
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.topic-card {
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .06);
  border-radius: 16px; overflow: hidden; transition: all .3s;
}
.topic-card:hover { transform: translateY(-4px); border-color: rgba(96, 165, 250, .4); box-shadow: 0 12px 32px rgba(0, 0, 0, .3); }
.topic-img { width: 100%; height: 180px; object-fit: cover; }
.topic-body { padding: 24px; }
.topic-tag {
  display: inline-block; font-size: .75rem; font-weight: 700;
  padding: 4px 12px; border-radius: 9999px; margin-bottom: 12px;
}
.topic-tag.blue { background: rgba(59, 130, 246, .15); color: var(--accent-light); }
.topic-tag.yellow { background: rgba(245, 158, 11, .15); color: var(--warning); }
.topic-tag.green { background: rgba(52, 211, 153, .15); color: var(--success); }
.topic-title { font-size: 1.1rem; font-weight: 700; color: #F8FAFC; margin-bottom: 10px; }
.topic-desc { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }

/* ===== Scenario ===== */
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scenario-card {
  background: rgba(255, 255, 255, .04); border: 1px solid rgba(255, 255, 255, .06);
  border-radius: 16px; padding: 28px; transition: all .3s;
}
.scenario-card:hover { border-color: rgba(96, 165, 250, .4); transform: translateY(-4px); }
.scenario-icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: rgba(59, 130, 246, .12); border: 1px solid rgba(59, 130, 246, .25);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent-light); font-size: 1.25rem; margin-bottom: 18px;
}
.scenario-title { font-size: 1.05rem; font-weight: 700; color: #F8FAFC; margin-bottom: 10px; }
.scenario-desc { color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }

/* ===== Process ===== */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-step { text-align: center; padding: 32px 16px; background: rgba(255, 255, 255, .03); border-radius: 16px; border: 1px solid rgba(255, 255, 255, .05); }
.step-num {
  width: 48px; height: 48px; margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, #3B82F6, #2563EB);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; color: #fff;
  box-shadow: 0 0 18px rgba(59, 130, 246, .4);
}
.step-title { font-weight: 700; color: #F8FAFC; font-size: 1rem; margin-bottom: 8px; }
.step-desc { color: var(--text-muted); font-size: .85rem; line-height: 1.6; }

/* ===== FAQ ===== */
.faq-wrap { display: grid; grid-template-columns: .8fr 1.2fr; gap: 48px; align-items: start; }
.faq-list { width: 100%; }
.faq-item { border-bottom: 1px solid rgba(255, 255, 255, .08); }
.faq-question {
  width: 100%; display: flex; justify-content: space-between; align-items: center;
  padding: 20px 0; background: transparent; border: none;
  color: var(--text-primary); font-size: 1rem; font-weight: 600;
  text-align: left; transition: color .3s;
}
.faq-question:hover { color: var(--accent-light); }
.faq-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--warning); display: inline-block; margin-right: 10px; box-shadow: 0 0 8px rgba(245, 158, 11, .6); flex-shrink: 0; }
.faq-icon { color: var(--warning); transition: transform .3s; flex-shrink: 0; margin-left: 12px; }
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .4s ease; }
.faq-item.active .faq-answer { max-height: 400px; }
.faq-answer-inner { padding: 0 0 20px; color: var(--text-secondary); font-size: .9rem; line-height: 1.7; }

/* ===== CTA ===== */
.cta-section { padding: 80px 0; background: linear-gradient(120deg, #0B1220, #1D4ED8); position: relative; overflow: hidden; }
.cta-inner {
  text-align: center; padding: 56px 32px;
  border-radius: 24px;
  background: rgba(255, 255, 255, .06);
  border: 1px solid rgba(255, 255, 255, .12);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}
.cta-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; color: #F8FAFC; margin-bottom: 16px; }
.cta-desc { color: rgba(226, 232, 240, .8); max-width: 600px; margin: 0 auto 32px; font-size: .95rem; line-height: 1.8; }
.trust-badge { display: inline-flex; align-items: center; gap: 8px; color: rgba(226, 232, 240, .6); font-size: .8rem; margin-top: 24px; }

/* ===== Footer ===== */
.footer { background: #060C18; border-top: 1px solid rgba(255, 255, 255, .04); }
.footer h5 { color: var(--text-primary); font-size: 1rem; font-weight: 600; margin-bottom: 16px; }
.footer .grid div a { display: block; color: var(--text-muted); font-size: .875rem; padding: 6px 0; transition: color .3s; }
.footer .grid div a:hover { color: var(--accent-light); }
.footer .grid .flex a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255, 255, 255, .05); border: 1px solid rgba(255, 255, 255, .08);
  padding: 0; transition: all .3s;
}
.footer .grid .flex a:hover { border-color: rgba(96, 165, 250, .5); color: var(--accent-light); }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, .05); padding: 20px 0; color: var(--text-muted); font-size: .8rem; }

/* ===== Keyframes ===== */
@keyframes pulse-glow {
  0%, 100% { box-shadow: 0 0 24px rgba(59, 130, 246, .4); }
  50% { box-shadow: 0 0 44px rgba(96, 165, 250, .7); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.hero-content { animation: fadeUp .8s ease both; }
.hero-status { animation: fadeUp 1s ease .2s both; }
.btn-primary.pulse { animation: pulse-glow 3s ease-in-out infinite; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { padding: 64px 0; }
  .feature-row { grid-template-columns: 1fr; gap: 24px; }
  .metrics-card { grid-template-columns: 1fr 1fr; }
  .topic-grid { grid-template-columns: 1fr 1fr; }
  .scenario-grid { grid-template-columns: 1fr 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; }
  .faq-wrap { grid-template-columns: 1fr; gap: 32px; }
  .section { padding: 72px 0; }
}
@media (max-width: 768px) {
  .container-custom { padding: 0 16px; }
  .header-top { flex-wrap: wrap; }
  .search-bar { order: 3; max-width: 100%; flex-basis: 100%; }
  .hero { padding: 56px 0; }
  .hero-title { font-size: 2rem; }
  .btn-group .btn-primary, .btn-group .btn-secondary { flex: 1; justify-content: center; }
  .metrics-card { padding: 28px; }
  .topic-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .section { padding: 56px 0; }
}
@media (max-width: 520px) {
  .hero-title { font-size: 1.8rem; }
  .metrics-card { grid-template-columns: 1fr; text-align: center; }
  .process-grid { grid-template-columns: 1fr; }
  .btn-group { flex-direction: column; }
  .btn-group .btn-primary, .btn-group .btn-secondary { justify-content: center; width: 100%; }
  .cta-inner { padding: 40px 20px; }
}

/* roulang page: category3 */
:root {
        --bg-primary: #0B1220;
        --bg-secondary: #0F172A;
        --accent: #3B82F6;
        --accent-light: #60A5FA;
        --accent-dark: #2563EB;
        --success: #34D399;
        --warning: #F59E0B;
        --text-primary: #F1F5F9;
        --text-secondary: #94A3B8;
        --text-muted: #64748B;
        --border: rgba(255, 255, 255, 0.08);
        --border-strong: rgba(255, 255, 255, 0.12);
        --glass-bg: rgba(255, 255, 255, 0.06);
        --radius-lg: 24px;
        --radius-md: 16px;
        --radius-sm: 12px;
        --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
        --glow: rgba(59, 130, 246, 0.4);
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        background-color: var(--bg-primary);
        color: var(--text-primary);
        font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        font-size: 16px;
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
    }

    a {
        color: inherit;
        text-decoration: none;
        transition: color 0.25s ease;
    }

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

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

    .container-custom {
        max-width: 1200px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 24px;
        padding-right: 24px;
    }

    .section-pad {
        padding-top: 96px;
        padding-bottom: 96px;
    }

    @media (max-width: 767px) {
        .section-pad {
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .container-custom {
            padding-left: 16px;
            padding-right: 16px;
        }
    }

    /* ===== Header ===== */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(11, 18, 32, 0.9);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-bottom: 1px solid var(--border);
    }

    .nav-top {
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    }

    .nav-top-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 68px;
        gap: 16px;
    }

    .brand {
        display: flex;
        align-items: center;
        gap: 12px;
        flex-shrink: 0;
    }

    .logo-mark {
        width: 40px;
        height: 40px;
        border-radius: 12px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        font-weight: 800;
        color: #fff;
        box-shadow: 0 0 18px rgba(59, 130, 246, 0.5);
        font-family: "Arial Black", sans-serif;
    }

    .brand-name {
        font-size: 20px;
        font-weight: 700;
        color: var(--text-primary);
        letter-spacing: 0.02em;
        white-space: nowrap;
    }

    .nav-search {
        flex: 1;
        max-width: 460px;
        margin: 0 auto;
    }

    .search-form {
        display: flex;
        align-items: center;
        background: rgba(255, 255, 255, 0.06);
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 9999px;
        padding: 6px 6px 6px 18px;
        transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .search-form:focus-within {
        border-color: var(--accent);
        box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
    }

    .search-input {
        flex: 1;
        background: transparent;
        color: var(--text-primary);
        font-size: 14px;
        border: none;
        padding: 6px 0;
    }

    .search-input::placeholder {
        color: var(--text-muted);
    }

    .search-btn {
        width: 36px;
        height: 36px;
        border-radius: 9999px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        cursor: pointer;
        font-size: 14px;
        transition: transform 0.2s ease, box-shadow 0.2s ease;
        flex-shrink: 0;
    }

    .search-btn:hover {
        box-shadow: 0 0 16px rgba(59, 130, 246, 0.5);
        transform: scale(1.04);
    }

    .btn-login {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        padding: 8px 24px;
        border-radius: 9999px;
        border: 1px solid var(--border-strong);
        color: var(--text-primary);
        font-size: 14px;
        font-weight: 600;
        transition: background 0.25s ease, border-color 0.25s ease;
        white-space: nowrap;
        flex-shrink: 0;
    }

    .btn-login:hover {
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(255, 255, 255, 0.2);
    }

    .channel-tabs-wrapper {
        background: transparent;
    }

    .channel-tabs {
        padding: 12px 0 12px;
    }

    .channel-tabs-inner {
        display: flex;
        gap: 8px;
        overflow-x: auto;
        scrollbar-width: none;
        -ms-overflow-style: none;
        padding-bottom: 2px;
    }

    .channel-tabs-inner::-webkit-scrollbar {
        display: none;
    }

    .channel-tab {
        flex-shrink: 0;
        padding: 8px 20px;
        border-radius: 9999px;
        font-size: 14px;
        font-weight: 500;
        color: var(--text-secondary);
        background: transparent;
        border: 1px solid transparent;
        transition: all 0.25s ease;
        white-space: nowrap;
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .channel-tab:hover {
        color: var(--text-primary);
        background: rgba(255, 255, 255, 0.05);
    }

    .channel-tab.active {
        color: #fff;
        background: rgba(59, 130, 246, 0.18);
        border-color: rgba(59, 130, 246, 0.45);
        box-shadow: 0 0 12px rgba(59, 130, 246, 0.15);
    }

    /* ===== Hero ===== */
    .page-hero {
        position: relative;
        padding: 120px 0 80px;
        background-image: url('/assets/images/backpic/back-2.webp');
        background-size: cover;
        background-position: center;
        overflow: hidden;
    }

    .page-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(11, 18, 32, 0.92), rgba(11, 18, 32, 0.75), rgba(15, 23, 42, 0.85));
        z-index: 1;
    }

    .page-hero::after {
        content: '';
        position: absolute;
        top: -120px;
        right: -80px;
        width: 360px;
        height: 360px;
        background: radial-gradient(circle, rgba(59, 130, 246, 0.35), transparent 70%);
        z-index: 1;
    }

    .page-hero .container-custom {
        position: relative;
        z-index: 2;
    }

    .hero-breadcrumb {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--text-secondary);
        margin-bottom: 20px;
        flex-wrap: wrap;
    }

    .hero-breadcrumb a {
        color: var(--text-secondary);
        transition: color 0.2s ease;
    }

    .hero-breadcrumb a:hover {
        color: var(--accent-light);
    }

    .hero-breadcrumb .sep {
        color: var(--text-muted);
        font-size: 12px;
    }

    .hero-breadcrumb .current {
        color: var(--text-primary);
    }

    .page-hero h1 {
        font-size: clamp(2.2rem, 4vw, 3.2rem);
        font-weight: 800;
        line-height: 1.2;
        color: #fff;
        margin-bottom: 20px;
        letter-spacing: 0.02em;
    }

    .page-hero .hero-sub {
        font-size: 17px;
        color: rgba(255, 255, 255, 0.72);
        line-height: 1.75;
        max-width: 640px;
        margin-bottom: 32px;
    }

    .hero-cta-group {
        display: flex;
        gap: 16px;
        flex-wrap: wrap;
        align-items: center;
    }

    .btn-primary {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 32px;
        border-radius: 9999px;
        background: linear-gradient(135deg, #3B82F6, #2563EB);
        color: #fff;
        font-size: 15px;
        font-weight: 600;
        box-shadow: 0 0 24px rgba(59, 130, 246, 0.4);
        transition: all 0.3s ease;
        cursor: pointer;
        border: none;
        position: relative;
    }

    .btn-primary::after {
        content: '';
        position: absolute;
        inset: -2px;
        border-radius: 9999px;
        border: 2px solid rgba(96, 165, 250, 0.4);
        animation: pulse-ring 2.2s infinite ease-out;
        pointer-events: none;
    }

    @keyframes pulse-ring {
        0% {
            transform: scale(1);
            opacity: 0.7;
        }
        70% {
            transform: scale(1.06);
            opacity: 0;
        }
        100% {
            transform: scale(1.06);
            opacity: 0;
        }
    }

    .btn-primary:hover {
        box-shadow: 0 0 40px rgba(96, 165, 250, 0.6);
        transform: translateY(-2px);
    }

    .btn-secondary {
        display: inline-flex;
        align-items: center;
        gap: 10px;
        padding: 14px 32px;
        border-radius: 9999px;
        background: transparent;
        border: 1px solid rgba(255, 255, 255, 0.2);
        color: #fff;
        font-size: 15px;
        font-weight: 500;
        backdrop-filter: blur(8px);
        transition: all 0.3s ease;
        cursor: pointer;
    }

    .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.08);
        border-color: rgba(255, 255, 255, 0.35);
        transform: translateY(-2px);
    }

    .hero-meta {
        margin-top: 28px;
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.6);
    }

    .hero-meta i {
        color: var(--success);
        font-size: 12px;
    }

    /* ===== Intro ===== */
    .intro-section {
        background: var(--bg-primary);
    }

    .intro-grid {
        display: grid;
        grid-template-columns: 1.2fr 0.8fr;
        gap: 56px;
        align-items: center;
    }

    .intro-text p {
        color: var(--text-secondary);
        line-height: 1.8;
        margin-bottom: 20px;
        font-size: 15px;
    }

    .intro-text p strong {
        color: var(--text-primary);
    }

    .intro-tip {
        display: flex;
        gap: 12px;
        padding: 18px 20px;
        border-radius: var(--radius-md);
        background: rgba(59, 130, 246, 0.08);
        border: 1px solid rgba(59, 130, 246, 0.2);
        margin-top: 8px;
    }

    .intro-tip i {
        color: var(--accent-light);
        font-size: 18px;
        margin-top: 2px;
    }

    .intro-tip p {
        margin-bottom: 0;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.78);
    }

    .stats-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 16px;
    }

    .stat-card {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 24px 20px;
        backdrop-filter: blur(12px);
        transition: border-color 0.3s ease, transform 0.3s ease;
    }

    .stat-card:hover {
        border-color: rgba(59, 130, 246, 0.4);
        transform: translateY(-3px);
    }

    .stat-number {
        font-size: 2rem;
        font-weight: 800;
        color: #fff;
        line-height: 1.2;
        margin-bottom: 4px;
        text-shadow: 0 0 20px rgba(59, 130, 246, 0.35);
    }

    .stat-label {
        font-size: 13px;
        color: var(--text-secondary);
    }

    /* ===== Info Blocks ===== */
    .info-block-section {
        background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
        padding: 96px 0;
    }

    .info-block {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 60px;
        align-items: center;
        margin-bottom: 88px;
    }

    .info-block:last-child {
        margin-bottom: 0;
    }

    .info-block.reversed .info-text {
        order: 2;
    }

    .info-block.reversed .info-image {
        order: 1;
    }

    .info-kicker {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        font-weight: 600;
        color: var(--accent-light);
        letter-spacing: 0.04em;
        margin-bottom: 12px;
        background: rgba(59, 130, 246, 0.1);
        padding: 5px 14px;
        border-radius: 9999px;
        border: 1px solid rgba(59, 130, 246, 0.2);
    }

    .info-block h2 {
        font-size: clamp(1.5rem, 2.6vw, 2rem);
        font-weight: 700;
        color: #fff;
        line-height: 1.3;
        margin-bottom: 16px;
        letter-spacing: 0.01em;
    }

    .info-block .info-desc {
        color: var(--text-secondary);
        line-height: 1.8;
        font-size: 15px;
        margin-bottom: 24px;
    }

    .info-features {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 14px;
    }

    .info-feature {
        display: flex;
        gap: 12px;
        padding: 16px;
        border-radius: var(--radius-sm);
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.05);
        transition: background 0.25s ease, border-color 0.25s ease;
    }

    .info-feature:hover {
        background: rgba(59, 130, 246, 0.06);
        border-color: rgba(59, 130, 246, 0.25);
    }

    .info-feature-icon {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(37, 99, 235, 0.15));
        display: flex;
        align-items: center;
        justify-content: center;
        color: var(--accent-light);
        font-size: 15px;
        flex-shrink: 0;
    }

    .info-feature-text h4 {
        font-size: 14px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 4px;
    }

    .info-feature-text p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.5;
    }

    .info-image {
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border);
        box-shadow: var(--shadow-card);
        position: relative;
    }

    .info-image img {
        width: 100%;
        height: 320px;
        object-fit: cover;
        transition: transform 0.5s ease;
    }

    .info-image:hover img {
        transform: scale(1.03);
    }

    .info-image .image-caption {
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        padding: 32px 20px 14px;
        background: linear-gradient(transparent, rgba(11, 18, 32, 0.85));
        font-size: 13px;
        color: rgba(255, 255, 255, 0.85);
    }

    /* ===== Scenarios ===== */
    .scenarios-section {
        background: var(--bg-primary);
    }

    .section-heading {
        text-align: center;
        margin-bottom: 56px;
    }

    .section-heading .heading-kicker {
        display: inline-block;
        font-size: 13px;
        font-weight: 600;
        color: var(--accent-light);
        letter-spacing: 0.06em;
        margin-bottom: 10px;
        text-transform: none;
    }

    .section-heading h2 {
        font-size: clamp(1.6rem, 3vw, 2.2rem);
        font-weight: 700;
        color: #fff;
        margin-bottom: 14px;
        letter-spacing: 0.01em;
    }

    .section-heading p {
        color: var(--text-secondary);
        max-width: 600px;
        margin: 0 auto;
        font-size: 15px;
    }

    .scenario-cards {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 24px;
    }

    .scenario-card {
        padding: 36px 28px;
        border-radius: var(--radius-lg);
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid var(--border);
        backdrop-filter: blur(12px);
        transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .scenario-card:hover {
        transform: translateY(-6px);
        border-color: rgba(59, 130, 246, 0.5);
        box-shadow: 0 12px 36px rgba(0, 0, 0, 0.3), 0 0 20px rgba(59, 130, 246, 0.08);
    }

    .scenario-icon {
        width: 56px;
        height: 56px;
        border-radius: 14px;
        background: linear-gradient(135deg, rgba(59, 130, 246, 0.25), rgba(37, 99, 235, 0.12));
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 22px;
        color: var(--accent-light);
        margin-bottom: 20px;
        border: 1px solid rgba(59, 130, 246, 0.25);
    }

    .scenario-card h3 {
        font-size: 17px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 10px;
    }

    .scenario-card p {
        font-size: 14px;
        color: var(--text-secondary);
        line-height: 1.7;
    }

    /* ===== Process ===== */
    .process-section {
        background: linear-gradient(180deg, var(--bg-primary), var(--bg-secondary));
        padding: 96px 0;
    }

    .process-steps {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 24px;
        position: relative;
    }

    .process-step {
        position: relative;
        padding: 28px 24px;
        border-radius: var(--radius-md);
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid var(--border);
        text-align: center;
        transition: transform 0.3s ease, border-color 0.3s ease;
    }

    .process-step:hover {
        transform: translateY(-4px);
        border-color: rgba(59, 130, 246, 0.4);
    }

    .step-number {
        width: 40px;
        height: 40px;
        border-radius: 9999px;
        background: linear-gradient(135deg, var(--accent), var(--accent-dark));
        color: #fff;
        font-weight: 700;
        font-size: 16px;
        display: flex;
        align-items: center;
        justify-content: center;
        margin: 0 auto 16px;
        box-shadow: 0 0 16px rgba(59, 130, 246, 0.35);
    }

    .process-step h3 {
        font-size: 15px;
        font-weight: 600;
        color: #fff;
        margin-bottom: 8px;
    }

    .process-step p {
        font-size: 13px;
        color: var(--text-secondary);
        line-height: 1.6;
    }

    .process-arrow {
        position: absolute;
        top: 50%;
        right: -18px;
        transform: translateY(-50%);
        color: var(--accent);
        font-size: 14px;
        z-index: 2;
        background: var(--bg-secondary);
        width: 28px;
        height: 28px;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        border: 1px solid rgba(59, 130, 246, 0.3);
    }

    /* ===== FAQ ===== */
    .faq-section {
        background: var(--bg-primary);
    }

    .faq-layout {
        display: grid;
        grid-template-columns: 0.7fr 1.3fr;
        gap: 56px;
        align-items: start;
    }

    .faq-side .faq-side-sticky {
        position: sticky;
        top: 180px;
    }

    .faq-side h2 {
        font-size: clamp(1.6rem, 3vw, 2.1rem);
        font-weight: 700;
        color: #fff;
        line-height: 1.3;
        margin-bottom: 16px;
    }

    .faq-side p {
        color: var(--text-secondary);
        font-size: 15px;
        line-height: 1.7;
        margin-bottom: 20px;
    }

    .faq-side a {
        color: var(--accent-light);
        font-weight: 500;
        font-size: 14px;
    }

    .faq-side a:hover {
        text-decoration: underline;
    }

    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 16px;
    }

    .faq-item {
        border-radius: var(--radius-md);
        border: 1px solid var(--border);
        background: rgba(255, 255, 255, 0.04);
        overflow: hidden;
        transition: border-color 0.3s ease;
    }

    .faq-item.open {
        border-color: rgba(59, 130, 246, 0.35);
    }

    .faq-question {
        width: 100%;
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 20px 24px;
        cursor: pointer;
        background: transparent;
        color: #fff;
        font-size: 15px;
        font-weight: 500;
        text-align: left;
        transition: background 0.2s ease;
    }

    .faq-question:hover {
        background: rgba(255, 255, 255, 0.03);
    }

    .faq-question .faq-q-left {
        display: flex;
        align-items: center;
        gap: 12px;
    }

    .faq-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: var(--warning);
        flex-shrink: 0;
        box-shadow: 0 0 8px rgba(245, 158, 11, 0.4);
    }

    .faq-icon {
        width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 14px;
        color: var(--accent-light);
        transition: transform 0.3s ease;
        flex-shrink: 0;
    }

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

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease, opacity 0.3s ease;
        opacity: 0;
        padding: 0 24px;
    }

    .faq-item.open .faq-answer {
        max-height: 400px;
        opacity: 1;
        padding: 0 24px 20px;
    }

    .faq-answer-inner {
        font-size: 14px;
        line-height: 1.7;
        color: var(--text-secondary);
        border-left: 2px solid rgba(59, 130, 246, 0.4);
        padding-left: 16px;
    }

    /* ===== CTA ===== */
    .cta-section {
        padding: 96px 0;
        background: linear-gradient(135deg, #0F172A, #1E3A8A, #0B1220);
        position: relative;
        overflow: hidden;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        top: -60px;
        left: 20%;
        width: 300px;
        height: 300px;
        background: radial-gradient(circle, rgba(59, 130, 246, 0.3), transparent 70%);
        z-index: 0;
    }

    .cta-inner {
        position: relative;
        z-index: 1;
        text-align: center;
        background: rgba(255, 255, 255, 0.04);
        backdrop-filter: blur(16px);
        border: 1px solid rgba(255, 255, 255, 0.1);
        border-radius: var(--radius-lg);
        padding: 64px 48px;
        max-width: 900px;
        margin: 0 auto;
    }

    .cta-inner h2 {
        font-size: clamp(1.8rem, 3.2vw, 2.4rem);
        font-weight: 800;
        color: #fff;
        margin-bottom: 16px;
        letter-spacing: 0.02em;
    }

    .cta-inner p {
        color: rgba(255, 255, 255, 0.7);
        font-size: 15px;
        max-width: 560px;
        margin: 0 auto 32px;
        line-height: 1.8;
    }

    .cta-inner .btn-primary {
        font-size: 16px;
        padding: 16px 40px;
    }

    .cta-trust {
        display: flex;
        justify-content: center;
        gap: 28px;
        flex-wrap: wrap;
        margin-top: 28px;
    }

    .cta-trust span {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 13px;
        color: rgba(255, 255, 255, 0.55);
    }

    .cta-trust i {
        color: var(--success);
        font-size: 12px;
    }

    /* ===== Footer ===== */
    .footer {
        background: #060C18;
        border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .footer h5 {
        font-size: 15px;
        font-weight: 600;
        color: #E2E8F0;
        margin-bottom: 16px;
    }

    .footer a {
        display: block;
        font-size: 14px;
        color: var(--text-secondary);
        padding: 4px 0;
        transition: color 0.2s ease;
    }

    .footer a:hover {
        color: var(--accent-light);
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        padding: 20px 0;
        font-size: 13px;
        color: var(--text-muted);
    }

    /* ===== Responsive ===== */
    @media (max-width: 1279px) {
        .process-steps {
            grid-template-columns: repeat(2, 1fr);
        }
        .process-arrow {
            display: none;
        }
        .scenario-cards {
            grid-template-columns: repeat(3, 1fr);
        }
    }

    @media (max-width: 1023px) {
        .intro-grid {
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .info-block {
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .info-block.reversed .info-text {
            order: 1;
        }
        .info-block.reversed .info-image {
            order: 2;
        }
        .faq-layout {
            grid-template-columns: 1fr;
            gap: 40px;
        }
        .faq-side .faq-side-sticky {
            position: static;
        }
        .scenario-cards {
            grid-template-columns: 1fr;
            max-width: 520px;
            margin: 0 auto;
        }
    }

    @media (max-width: 767px) {
        .nav-top-inner {
            height: 60px;
            gap: 12px;
        }
        .brand-name {
            font-size: 17px;
        }
        .logo-mark {
            width: 34px;
            height: 34px;
            font-size: 18px;
        }
        .nav-search {
            display: none;
        }
        .btn-login {
            padding: 6px 16px;
            font-size: 13px;
        }
        .page-hero {
            padding: 80px 0 56px;
        }
        .page-hero h1 {
            font-size: 1.8rem;
        }
        .page-hero .hero-sub {
            font-size: 15px;
        }
        .hero-cta-group {
            flex-direction: column;
            align-items: stretch;
        }
        .hero-cta-group .btn-primary,
        .hero-cta-group .btn-secondary {
            justify-content: center;
            width: 100%;
        }
        .info-features {
            grid-template-columns: 1fr;
        }
        .stats-grid {
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .stat-card {
            padding: 18px 14px;
        }
        .stat-number {
            font-size: 1.5rem;
        }
        .process-steps {
            grid-template-columns: 1fr;
        }
        .cta-inner {
            padding: 40px 20px;
        }
        .cta-trust {
            gap: 16px;
            flex-direction: column;
            align-items: center;
        }
        .section-heading {
            margin-bottom: 36px;
        }
        .channel-tabs-inner {
            gap: 6px;
        }
        .channel-tab {
            padding: 7px 16px;
            font-size: 13px;
        }
    }

    @media (max-width: 520px) {
        .container-custom {
            padding-left: 16px;
            padding-right: 16px;
        }
        .page-hero h1 {
            font-size: 1.55rem;
        }
        .hero-cta-group .btn-primary,
        .hero-cta-group .btn-secondary {
            font-size: 14px;
            padding: 12px 24px;
        }
        .info-image img {
            height: 220px;
        }
        .stats-grid {
            grid-template-columns: 1fr 1fr;
        }
        .stat-number {
            font-size: 1.3rem;
        }
        .cta-inner h2 {
            font-size: 1.4rem;
        }
    }

/* roulang page: category2 */
/* ========== Design Variables ========== */
        :root {
            --bg-primary: #0B1220;
            --bg-secondary: #0F172A;
            --bg-deep: #060C18;
            --accent: #3B82F6;
            --accent-light: #60A5FA;
            --success: #34D399;
            --warning: #F59E0B;
            --text-primary: #F1F5F9;
            --text-secondary: #94A3B8;
            --text-muted: #64748B;
            --border-glass: rgba(255, 255, 255, 0.12);
            --card-bg: rgba(255, 255, 255, 0.06);
            --neon-glow: rgba(59, 130, 246, 0.4);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 12px;
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.35);
        }

        /* ========== Reset / Base ========== */
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            background: var(--bg-primary);
            color: var(--text-primary);
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
            font-size: 1rem;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s;
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
        }

        /* ========== Container ========== */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 767px) {
            .container-custom {
                padding: 0 16px;
            }
        }

        /* ========== Section ========== */
        .section {
            padding: 96px 0;
        }
        @media (max-width: 767px) {
            .section {
                padding: 56px 0;
            }
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 14px;
            border-radius: 9999px;
            background: rgba(59, 130, 246, 0.1);
            border: 1px solid rgba(96, 165, 250, 0.3);
            color: var(--accent-light);
            font-size: .8rem;
            font-weight: 600;
            letter-spacing: .04em;
        }

        /* ========== Header / Navigation ========== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(11, 18, 32, 0.9);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            color: #fff;
            font-weight: 800;
            font-size: 1.15rem;
            box-shadow: 0 0 20px rgba(59, 130, 246, 0.35);
            flex-shrink: 0;
        }

        .search-box {
            display: flex;
            align-items: center;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.1);
            border-radius: 9999px;
            padding: 6px 6px 6px 18px;
            transition: border-color .3s, box-shadow .3s;
        }
        .search-box:focus-within {
            border-color: rgba(96, 165, 250, 0.6);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }
        .search-box input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            color: #F1F5F9;
            font-size: .88rem;
            min-width: 0;
        }
        .search-box input::placeholder {
            color: var(--text-muted);
        }
        .search-box button {
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            border: none;
            cursor: pointer;
            transition: opacity .3s;
            flex-shrink: 0;
        }
        .search-box button:hover {
            opacity: .9;
        }

        .btn-login {
            display: inline-flex;
            align-items: center;
            padding: 8px 22px;
            border-radius: 9999px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #E2E8F0;
            font-size: .88rem;
            font-weight: 600;
            transition: all .3s;
            background: rgba(255, 255, 255, 0.03);
        }
        .btn-login:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: rgba(255, 255, 255, 0.35);
            color: #fff;
        }

        .channel-tabs {
            display: flex;
            gap: 4px;
            overflow-x: auto;
            scrollbar-width: none;
            -ms-overflow-style: none;
            max-width: 100%;
        }
        .channel-tabs::-webkit-scrollbar {
            display: none;
        }

        .channel-tab {
            padding: 8px 20px;
            border-radius: 9999px;
            white-space: nowrap;
            color: var(--text-secondary);
            font-size: .9rem;
            font-weight: 500;
            transition: all .3s ease;
            border: 1px solid transparent;
            display: inline-flex;
            align-items: center;
        }
        .channel-tab:hover {
            color: #E2E8F0;
            background: rgba(255, 255, 255, 0.05);
        }
        .channel-tab.active {
            background: rgba(59, 130, 246, 0.15);
            border-color: rgba(96, 165, 250, 0.4);
            color: var(--accent-light);
            font-weight: 600;
        }

        /* ========== Buttons ========== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 9999px;
            background: linear-gradient(135deg, #3B82F6, #2563EB);
            color: #fff;
            font-weight: 600;
            font-size: .95rem;
            box-shadow: 0 0 24px rgba(59, 130, 246, 0.4);
            transition: all .3s ease;
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(96, 165, 250, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-primary:focus-visible {
            outline: 2px solid var(--accent-light);
            outline-offset: 3px;
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 9999px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: #E2E8F0;
            font-weight: 600;
            font-size: .95rem;
            transition: all .3s ease;
            cursor: pointer;
        }
        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }
        .btn-ghost:focus-visible {
            outline: 2px solid var(--accent-light);
            outline-offset: 3px;
        }

        .btn-lg {
            padding: 16px 38px;
            font-size: 1rem;
        }

        /* ========== Glass Card ========== */
        .glass-card {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: var(--radius-lg);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
        }
        .glass-card:hover {
            border-color: rgba(96, 165, 250, 0.5);
        }

        /* ========== Breadcrumb ========== */
        .breadcrumb {
            font-size: .8rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 4px;
        }
        .breadcrumb a:hover {
            color: var(--accent-light);
        }

        /* ========== Hero ========== */
        .hero-category {
            position: relative;
            overflow: hidden;
        }
        .hero-category .hero-bg {
            position: absolute;
            inset: 0;
            background-size: cover;
            background-position: center;
            opacity: .3;
        }
        .hero-category .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(11, 18, 32, .97) 0%, rgba(11, 18, 32, .86) 50%, rgba(11, 18, 32, .55) 100%);
        }
        .hero-orb-blue {
            position: absolute;
            top: -80px;
            right: -60px;
            width: 420px;
            height: 420px;
            background: rgba(59, 130, 246, 0.12);
            border-radius: 50%;
            filter: blur(120px);
            pointer-events: none;
        }
        .hero-orb-green {
            position: absolute;
            bottom: -60px;
            left: -40px;
            width: 280px;
            height: 280px;
            background: rgba(52, 211, 153, 0.07);
            border-radius: 50%;
            filter: blur(90px);
            pointer-events: none;
        }

        /* ========== Step Card ========== */
        .step-card {
            position: relative;
            padding: 32px 28px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all .3s ease;
            overflow: hidden;
        }
        .step-card:hover {
            border-color: rgba(96, 165, 250, 0.4);
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.05);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }
        .step-num {
            position: absolute;
            top: 20px;
            right: 24px;
            font-size: 3.2rem;
            font-weight: 800;
            color: rgba(255, 255, 255, 0.06);
            line-height: 1;
            pointer-events: none;
        }
        .step-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(59, 130, 246, 0.2), rgba(37, 99, 235, 0.1));
            border: 1px solid rgba(96, 165, 250, 0.25);
            color: var(--accent-light);
            font-size: 1.2rem;
            margin-bottom: 20px;
        }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .step-card p {
            font-size: .9rem;
            color: var(--text-secondary);
            line-height: 1.65;
            position: relative;
            z-index: 1;
        }

        /* ========== Feature List ========== */
        .feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            font-size: .92rem;
            color: #CBD5E1;
            line-height: 1.6;
        }
        .feature-list li i {
            margin-top: 4px;
            font-size: .95rem;
            flex-shrink: 0;
        }

        /* ========== Scene Image ========== */
        .scene-image {
            border-radius: 20px;
            overflow: hidden;
            border: 1px solid rgba(255, 255, 255, 0.1);
            box-shadow: var(--shadow-card);
            transition: transform .4s ease, border-color .4s ease;
        }
        .scene-image:hover {
            transform: translateY(-4px);
            border-color: rgba(96, 165, 250, 0.35);
        }
        .scene-image img {
            width: 100%;
            height: auto;
            aspect-ratio: 16 / 10;
            object-fit: cover;
        }

        /* ========== Prep Card ========== */
        .prep-card {
            padding: 32px 28px;
            border-radius: 20px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all .3s ease;
        }
        .prep-card:hover {
            border-color: rgba(96, 165, 250, 0.4);
            transform: translateY(-4px);
            background: rgba(255, 255, 255, 0.05);
        }
        .prep-icon {
            width: 50px;
            height: 50px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 18px;
            border: 1px solid;
        }
        .prep-card h3 {
            font-size: 1.05rem;
            font-weight: 600;
            margin-bottom: 10px;
        }
        .prep-card p {
            font-size: .88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ========== Support Card ========== */
        .support-item {
            padding: 24px 18px;
            border-radius: 16px;
            transition: background .3s;
        }
        .support-item:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        /* ========== FAQ ========== */
        .faq-item {
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .faq-item:first-child {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 22px 4px;
            background: transparent;
            border: none;
            color: #E2E8F0;
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            transition: color .3s;
        }
        .faq-question:hover {
            color: var(--accent-light);
        }
        .faq-question:focus-visible {
            outline: 2px solid var(--accent-light);
            outline-offset: -2px;
            border-radius: 8px;
        }
        .faq-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--warning);
            flex-shrink: 0;
        }
        .faq-icon {
            margin-left: auto;
            display: flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-secondary);
            transition: transform .3s ease, border-color .3s, color .3s;
            flex-shrink: 0;
            font-size: .8rem;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease, padding .35s ease;
            padding: 0 0 0 20px;
        }
        .faq-answer p {
            font-size: .9rem;
            line-height: 1.7;
            color: var(--text-secondary);
        }
        .faq-item.open .faq-answer {
            max-height: 320px;
            padding: 0 0 22px 20px;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            border-color: var(--accent-light);
            color: var(--accent-light);
        }
        .faq-item.open .faq-question {
            color: var(--accent-light);
        }

        /* ========== CTA ========== */
        .cta-panel {
            position: relative;
            overflow: hidden;
            text-align: center;
            padding: 64px 32px;
            border-radius: var(--radius-lg);
            background: linear-gradient(135deg, #1E3A8A 0%, #2563EB 55%, #1E40AF 100%);
            box-shadow: var(--shadow-card);
        }
        .cta-panel::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 300px;
            background: rgba(255, 255, 255, 0.15);
            filter: blur(80px);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-panel>* {
            position: relative;
            z-index: 1;
        }

        /* ========== Footer ========== */
        .footer {
            background: var(--bg-deep);
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }
        .footer h5 {
            color: #E2E8F0;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer a {
            display: block;
            margin-bottom: 10px;
            color: var(--text-secondary);
            font-size: .88rem;
            line-height: 1.5;
            transition: color .25s;
        }
        .footer a:hover {
            color: var(--accent-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 18px 0;
            color: var(--text-muted);
            font-size: .8rem;
        }

        /* ========== Animations ========== */
        @keyframes pulseGlow {
            0%,
            100% {
                box-shadow: 0 0 24px rgba(59, 130, 246, 0.4);
            }
            50% {
                box-shadow: 0 0 40px rgba(96, 165, 250, 0.7);
            }
        }
        .btn-primary.pulse {
            animation: pulseGlow 3s ease-in-out infinite;
        }

        @keyframes fadeUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        .fade-up {
            animation: fadeUp .7s ease both;
        }

        @keyframes floatLight {
            0%,
            100% {
                transform: translateY(0);
                opacity: .6;
            }
            50% {
                transform: translateY(-12px);
                opacity: 1;
            }
        }
        .float-light {
            animation: floatLight 6s ease-in-out infinite;
        }

        /* ========== Responsive ========== */
        @media (max-width: 767px) {
            .btn-primary,
            .btn-ghost {
                width: 100%;
                padding: 14px 24px;
            }
            .hero-category h1 {
                font-size: 2rem;
                line-height: 1.25;
            }
            .cta-panel {
                padding: 48px 24px;
            }
            .faq-question {
                padding: 18px 0;
                font-size: .95rem;
            }
        }

        @media (min-width: 768px) and (max-width: 1279px) {
            .hero-category h1 {
                font-size: 3rem;
            }
        }

        @media (min-width: 1280px) {
            .hero-category h1 {
                font-size: 3.5rem;
            }
        }