/* roulang page: index */
/* ===== Base Reset ===== */
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
  body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background: #f7f5f1;
    color: #1c2b38;
    line-height: 1.75;
  }
  img { display: block; max-width: 100%; height: auto; }
  a { text-decoration: none; color: inherit; }
  button { font-family: inherit; }
  .container-site { max-width: 1200px; margin: 0 auto; padding-left: 24px; padding-right: 24px; }

  /* ===== Custom Buttons & Components ===== */
  .btn-primary {
    display: inline-flex; align-items: center; gap: 8px;
    background: #c29845; color: #0a1a25;
    font-weight: 700; font-size: 15px; letter-spacing: .02em;
    padding: 12px 28px; border-radius: 999px;
    border: 1px solid transparent;
    transition: all .3s ease;
    box-shadow: 0 8px 24px rgba(194,152,69,.28);
  }
  .btn-primary:hover {
    background: #cda85f; transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(194,152,69,.35);
  }
  .btn-outline {
    display: inline-flex; align-items: center; gap: 8px;
    background: transparent; color: #eef2f5;
    font-weight: 600; font-size: 15px;
    padding: 11px 26px; border-radius: 999px;
    border: 1px solid rgba(255,255,255,.55);
    transition: all .3s ease;
  }
  .btn-outline:hover {
    background: rgba(255,255,255,.1); border-color: #fff;
    transform: translateY(-2px);
  }
  .btn-dark {
    display: inline-flex; align-items: center; gap: 8px;
    background: #0f2330; color: #fff;
    font-weight: 700; font-size: 15px;
    padding: 12px 28px; border-radius: 999px;
    transition: all .3s ease;
  }
  .btn-dark:hover {
    background: #1b3543; transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(15,35,48,.22);
  }

  /* ===== Section ===== */
  .section { padding: 96px 0; }
  .section-label {
    display: inline-flex; align-items: center; gap: 8px;
    background: rgba(194,152,69,.14);
    color: #a87c33; font-size: 13px; font-weight: 700;
    padding: 6px 18px; border-radius: 999px;
    letter-spacing: .08em;
  }
  .section-title {
    font-family: 'Noto Serif SC', 'Songti SC', Georgia, serif;
    font-size: clamp(30px, 4.5vw, 46px);
    line-height: 1.25; font-weight: 700;
    color: #0f2330; margin-top: 16px;
  }
  .section-desc { color: #5c6b7a; font-size: 17px; max-width: 560px; margin-top: 16px; }

  /* ===== Header / Nav ===== */
  .site-header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 50;
    background: rgba(15,35,48,.96);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(255,255,255,.06);
    transition: all .3s ease;
  }
  .site-header.scrolled { box-shadow: 0 10px 40px rgba(0,0,0,.18); }
  .nav-wrap { display: flex; align-items: center; justify-content: space-between; height: 72px; }
  .brand-logo {
    font-family: 'Noto Serif SC', 'Songti SC', serif;
    font-size: 24px; font-weight: 800; color: #fff;
    letter-spacing: .02em; display: inline-flex; align-items: center; gap: 10px;
  }
  .brand-logo .logo-mark {
    width: 36px; height: 36px; border-radius: 12px;
    background: linear-gradient(135deg, #c29845, #d8bb7e);
    display: inline-flex; align-items: center; justify-content: center;
    font-size: 16px; font-weight: 900; color: #0a1a25;
  }
  .nav-links { display: flex; align-items: center; gap: 6px; }
  .nav-link {
    display: inline-block; color: rgba(255,255,255,.72);
    font-size: 15px; font-weight: 500;
    padding: 10px 18px; border-radius: 999px;
    transition: all .25s ease;
  }
  .nav-link:hover { color: #fff; background: rgba(255,255,255,.08); }
  .nav-link.active { color: #fff; background: rgba(194,152,69,.22); }
  .nav-cta { margin-left: 12px; }

  /* ===== Hero ===== */
  .hero {
    position: relative; min-height: 92vh;
    display: flex; align-items: center;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover; background-position: center;
  }
  .hero::before {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(105deg, rgba(10,26,37,.93) 25%, rgba(10,26,37,.55) 60%, rgba(10,26,37,.25));
  }
  .hero-content { position: relative; z-index: 2; max-width: 680px; padding: 160px 0 100px; }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 10px;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.2);
    color: #f2e9d4; font-size: 13px; font-weight: 600;
    padding: 7px 20px; border-radius: 999px;
    backdrop-filter: blur(6px);
  }
  .hero-title {
    font-family: 'Noto Serif SC', 'Songti SC', Georgia, serif;
    font-size: clamp(36px, 6vw, 68px);
    line-height: 1.15; color: #fff; font-weight: 800;
    margin: 24px 0 20px;
  }
  .hero-desc { color: rgba(255,255,255,.8); font-size: 18px; max-width: 520px; }
  .hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-top: 36px; }

  /* ===== Feature Cards ===== */
  .feature-card {
    background: #fff; border-radius: 20px; padding: 36px 30px;
    border: 1px solid rgba(15,35,48,.06);
    box-shadow: 0 20px 45px rgba(15,35,48,.05);
    transition: transform .3s ease, box-shadow .3s ease;
    height: 100%;
  }
  .feature-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 28px 60px rgba(15,35,48,.12);
  }
  .feature-icon {
    width: 58px; height: 58px; border-radius: 16px;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; color: #fff; margin-bottom: 20px;
  }
  .feature-card h3 { font-size: 20px; font-weight: 700; color: #0f2330; margin-bottom: 10px; }
  .feature-card p { color: #5c6b7a; font-size: 15px; }

  /* ===== Category Cards ===== */
  .cat-card {
    position: relative; border-radius: 22px; overflow: hidden;
    display: block; height: 100%;
    box-shadow: 0 20px 45px rgba(15,35,48,.08);
    transition: transform .35s ease, box-shadow .35s ease;
  }
  .cat-card img { width: 100%; height: 340px; object-fit: cover; transition: transform .5s ease; }
  .cat-card:hover img { transform: scale(1.06); }
  .cat-card::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(10,26,37,.85) 0%, rgba(10,26,37,.2) 45%, rgba(0,0,0,.05) 100%);
  }
  .cat-card-content { position: absolute; bottom: 0; left: 0; right: 0; z-index: 2; padding: 32px 28px; }
  .cat-card-content h3 { color: #fff; font-size: 24px; font-weight: 700; margin-bottom: 6px; }
  .cat-card-content p { color: rgba(255,255,255,.75); font-size: 14px; }
  .cat-card .cat-arrow {
    display: inline-flex; align-items: center; gap: 8px;
    color: #d8bb7e; font-size: 14px; font-weight: 600; margin-top: 14px;
  }

  /* ===== Post List ===== */
  .post-item {
    display: flex; gap: 24px; align-items: center;
    background: #fff; border-radius: 18px; padding: 22px 26px;
    border: 1px solid rgba(15,35,48,.05);
    box-shadow: 0 10px 30px rgba(15,35,48,.04);
    transition: all .3s ease;
  }
  .post-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 18px 45px rgba(15,35,48,.1);
  }
  .post-item .post-index {
    font-family: 'Georgia', serif; font-size: 32px; font-weight: 800;
    color: rgba(15,35,48,.15); min-width: 44px;
  }
  .post-item h4 { font-size: 17px; font-weight: 700; color: #0f2330; line-height: 1.4; }
  .post-item p { font-size: 14px; color: #5c6b7a; margin-top: 4px; }
  .post-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: #94a3b8; margin-top: 10px; }

  /* ===== Stats ===== */
  .stats-section {
    background: #0f2330; color: #fff;
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover; background-position: center;
    position: relative;
  }
  .stats-section::before { content: ''; position: absolute; inset: 0; background: rgba(15,35,48,.88); }
  .stats-section .container-site { position: relative; z-index: 2; }
  .stat-item { text-align: center; padding: 30px 10px; }
  .stat-num {
    font-family: 'Georgia', serif; font-size: 50px; font-weight: 800;
    color: #d8bb7e; line-height: 1.1;
  }
  .stat-label { color: rgba(255,255,255,.7); font-size: 15px; margin-top: 8px; }

  /* ===== Process ===== */
  .process-step {
    position: relative; text-align: center; padding: 0 20px;
  }
  .process-step .step-num {
    width: 72px; height: 72px; border-radius: 50%;
    background: #fff; border: 2px solid #c29845; color: #a87c33;
    font-family: 'Georgia', serif; font-size: 26px; font-weight: 800;
    display: flex; align-items: center; justify-content: center; margin: 0 auto 20px;
    box-shadow: 0 0 0 8px rgba(194,152,69,.1);
  }
  .process-step h4 { font-size: 18px; font-weight: 700; color: #0f2330; }
  .process-step p { font-size: 14px; color: #5c6b7a; margin-top: 6px; }

  /* ===== Reading Card ===== */
  .reading-card {
    border-radius: 20px; overflow: hidden; background: #fff;
    border: 1px solid rgba(15,35,48,.05);
    box-shadow: 0 20px 45px rgba(15,35,48,.06);
    transition: transform .3s ease, box-shadow .3s ease;
    height: 100%;
  }
  .reading-card:hover { transform: translateY(-6px); box-shadow: 0 26px 60px rgba(15,35,48,.13); }
  .reading-card img { width: 100%; height: 220px; object-fit: cover; }
  .reading-card-body { padding: 28px; }
  .reading-card-body h3 { font-size: 19px; font-weight: 700; color: #0f2330; line-height: 1.45; }
  .reading-card-body p { font-size: 14px; color: #5c6b7a; margin-top: 10px; }
  .read-more { color: #a87c33; font-size: 14px; font-weight: 600; margin-top: 16px; display: inline-flex; align-items: center; gap: 6px; }

  /* ===== FAQ ===== */
  .faq-item {
    background: #fff; border-radius: 16px; padding: 28px 32px;
    border: 1px solid rgba(15,35,48,.05);
    box-shadow: 0 8px 24px rgba(15,35,48,.04);
    transition: all .3s ease;
  }
  .faq-item:hover { box-shadow: 0 16px 40px rgba(15,35,48,.09); }
  .faq-item h4 { font-size: 16px; font-weight: 700; color: #0f2330; display: flex; justify-content: space-between; align-items: center; cursor: pointer; }
  .faq-item p { font-size: 14px; color: #5c6b7a; margin-top: 14px; line-height: 1.8; }
  .faq-item .fa-plus { color: #c29845; font-size: 13px; }

  /* ===== CTA ===== */
  .cta-section {
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover; background-position: center;
    position: relative;
  }
  .cta-section::before { content: ''; position: absolute; inset: 0; background: rgba(10,26,37,.82); }
  .cta-content { position: relative; z-index: 2; text-align: center; padding: 100px 0; }
  .cta-content h2 { font-family: 'Noto Serif SC', 'Songti SC', Georgia, serif; font-size: clamp(28px, 4vw, 46px); color: #fff; }
  .cta-content p { color: rgba(255,255,255,.75); font-size: 17px; margin-top: 14px; max-width: 520px; margin-left: auto; margin-right: auto; }

  /* ===== Footer ===== */
  .site-footer { background: #0a1a25; color: rgba(255,255,255,.6); padding: 64px 0 0; }
  .site-footer h5 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px; }
  .footer-link { display: block; padding: 6px 0; font-size: 14px; color: rgba(255,255,255,.55); transition: color .2s; }
  .footer-link:hover { color: #d8bb7e; }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,.08);
    padding: 24px 0; margin-top: 48px;
    font-size: 13px; color: rgba(255,255,255,.4);
  }

  /* ===== Mobile Nav ===== */
  .mobile-menu-btn { display: none; }
  @media (max-width: 900px) {
    .nav-links, .nav-cta { display: none; }
    .mobile-menu-btn { display: inline-flex; align-items: center; justify-content: center; color: #fff; background: rgba(255,255,255,.1); width: 44px; height: 44px; border-radius: 12px; border: 1px solid rgba(255,255,255,.15); cursor: pointer; }
    .mobile-menu {
      position: fixed; top: 72px; right: 16px; left: 16px; z-index: 40;
      background: #0f2330; border-radius: 20px; padding: 20px;
      box-shadow: 0 30px 80px rgba(0,0,0,.35);
      display: none; flex-direction: column; gap: 6px;
    }
    .mobile-menu.open { display: flex; }
    .mobile-menu a { color: rgba(255,255,255,.85); padding: 14px 18px; border-radius: 12px; font-size: 16px; font-weight: 600; }
    .mobile-menu a:hover { background: rgba(255,255,255,.08); }
    .mobile-menu a.active { background: rgba(194,152,69,.2); color: #d8bb7e; }
    .mobile-menu .btn-primary { margin-top: 12px; justify-content: center; }
  }
  @media (max-width: 640px) {
    .section { padding: 64px 0; }
    .post-item { flex-direction: row; }
    .cat-card img { height: 260px; }
  }

/* roulang page: category1 */
:root {
            --ink: #171e2e;
            --primary: #1d2b4f;
            --accent: #c9a25e;
            --cream: #f6f2ec;
            --muted: #5f6c84;
            --border: #e5e0d8;
            --radius: 18px;
            --shadow: 0 20px 40px -20px rgba(15, 23, 42, .18);
            --shadow-lg: 0 32px 60px -24px rgba(15, 23, 42, .24);
            --section-space: clamp(3.5rem, 7vw, 6.5rem);
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            color: var(--ink);
            background: #fff;
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

        * {
            box-sizing: border-box;
        }

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

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

        .container-site {
            width: 100%;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.25rem;
            padding-right: 1.25rem;
        }

        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(23, 30, 46, .06);
            transition: box-shadow .3s ease;
        }

        .site-header.scrolled {
            box-shadow: 0 8px 30px -16px rgba(23, 30, 46, .16);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 76px;
            gap: 1rem;
        }

        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: .65rem;
            font-size: 1.2rem;
            font-weight: 800;
            letter-spacing: .01em;
            color: var(--ink);
            transition: opacity .25s;
        }

        .brand-logo:hover {
            opacity: .82;
        }

        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: var(--primary);
            color: #fff;
            font-size: .8rem;
            font-weight: 800;
            letter-spacing: .02em;
            box-shadow: 0 6px 14px -6px rgba(29, 43, 79, .5);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: .25rem;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            padding: .55rem .95rem;
            border-radius: 999px;
            font-size: .92rem;
            font-weight: 550;
            color: #42506b;
            transition: all .25s ease;
            border: 1px solid transparent;
        }

        .nav-link:hover {
            color: var(--primary);
            background: rgba(29, 43, 79, .06);
        }

        .nav-link.active {
            color: var(--primary);
            background: rgba(29, 43, 79, .09);
            font-weight: 650;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            padding: .72rem 1.4rem;
            border-radius: 999px;
            font-weight: 600;
            font-size: .9rem;
            border: 1px solid transparent;
            cursor: pointer;
            transition: all .28s ease;
            line-height: 1.2;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 10px 24px -10px rgba(29, 43, 79, .55);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 16px 30px -12px rgba(29, 43, 79, .55);
            background: #243764;
        }

        .btn-outline {
            border-color: rgba(255, 255, 255, .5);
            color: #fff;
            background: rgba(255, 255, 255, .08);
            backdrop-filter: blur(6px);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, .16);
            border-color: rgba(255, 255, 255, .85);
        }

        .btn-accent {
            background: var(--accent);
            color: #1d2b4f;
        }

        .btn-accent:hover {
            background: #d8ae68;
            transform: translateY(-2px);
            box-shadow: 0 14px 28px -12px rgba(201, 162, 94, .65);
        }

        .menu-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border-radius: 12px;
            border: 1px solid rgba(23, 30, 46, .12);
            background: #fff;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--primary);
            cursor: pointer;
            transition: all .25s;
        }

        .menu-toggle:hover {
            background: var(--cream);
        }

        .page-banner {
            position: relative;
            background: linear-gradient(135deg, rgba(23, 30, 46, .92) 0%, rgba(29, 43, 79, .82) 100%);
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .24;
            z-index: 0;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 70% 20%, rgba(201, 162, 94, .14), transparent 60%);
            z-index: 1;
        }

        .banner-inner {
            position: relative;
            z-index: 2;
            padding: clamp(3.5rem, 8vw, 6rem) 0;
        }

        .tag-chip {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            padding: .35rem 1rem;
            border-radius: 999px;
            font-size: .82rem;
            font-weight: 600;
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .2);
            color: #d5dbe8;
            backdrop-filter: blur(8px);
            margin-bottom: 1.2rem;
        }

        .section {
            padding: var(--section-space) 0;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 2.5rem;
        }

        .section-head .eyebrow {
            display: inline-block;
            font-size: .75rem;
            letter-spacing: .14em;
            text-transform: uppercase;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: .6rem;
        }

        .section-head h2 {
            font-size: clamp(1.5rem, 3vw, 2.4rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -.01em;
            color: var(--ink);
        }

        .section-head p {
            color: var(--muted);
            font-size: 1rem;
            margin-top: .75rem;
        }

        .content-card {
            background: #fff;
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: transform .3s ease, box-shadow .3s ease;
        }

        .content-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .content-card .card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 10;
        }

        .content-card .card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .6s ease;
        }

        .content-card:hover .card-image img {
            transform: scale(1.04);
        }

        .card-tag {
            position: absolute;
            top: 1rem;
            left: 1rem;
            z-index: 2;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(6px);
            padding: .3rem .8rem;
            border-radius: 999px;
            font-size: .75rem;
            font-weight: 600;
            color: var(--primary);
        }

        .chip-row {
            display: flex;
            flex-wrap: wrap;
            gap: .6rem;
            align-items: center;
        }

        .chip {
            display: inline-flex;
            align-items: center;
            gap: .4rem;
            padding: .5rem 1.05rem;
            border-radius: 999px;
            font-size: .86rem;
            font-weight: 500;
            border: 1px solid var(--border);
            background: #fff;
            color: #42506b;
            transition: all .25s;
            cursor: pointer;
        }

        .chip:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(29, 43, 79, .04);
        }

        .chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: #fff;
        }

        .timeline-wrap {
            position: relative;
            padding-left: 2rem;
        }

        .timeline-wrap::before {
            content: '';
            position: absolute;
            left: 12px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: linear-gradient(to bottom, var(--accent), var(--primary));
            border-radius: 2px;
        }

        .timeline-item {
            position: relative;
            padding: 1.6rem 1.75rem;
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            margin-bottom: 1.1rem;
            box-shadow: 0 6px 18px -10px rgba(23, 30, 46, .08);
            transition: all .3s;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -1.55rem;
            top: 1.9rem;
            width: 13px;
            height: 13px;
            border-radius: 50%;
            background: var(--accent);
            border: 3px solid #fff;
            box-shadow: 0 0 0 2px var(--accent);
        }

        .timeline-item:hover {
            border-color: rgba(29, 43, 79, .22);
            transform: translateX(4px);
        }

        .stat-block {
            text-align: center;
            padding: 1.8rem 1.2rem;
            border-radius: var(--radius);
            background: #fff;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            transition: transform .3s, box-shadow .3s;
        }

        .stat-block:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .stat-num {
            font-size: clamp(2rem, 4vw, 2.6rem);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.15;
            letter-spacing: -.02em;
        }

        .stat-label {
            font-size: .9rem;
            color: var(--muted);
            margin-top: .3rem;
            font-weight: 500;
        }

        .feature-card {
            display: flex;
            gap: 1rem;
            padding: 1.3rem 1.4rem;
            border-radius: 16px;
            background: rgba(255, 255, 255, .82);
            border: 1px solid rgba(255, 255, 255, .2);
            backdrop-filter: blur(8px);
            transition: background .3s, transform .3s;
        }

        .feature-card:hover {
            background: #fff;
            transform: translateY(-2px);
        }

        .feature-icon {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 12px;
            font-size: 1.05rem;
            color: #fff;
            background: var(--primary);
        }

        .dark-section {
            background: var(--primary);
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .dark-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: .1;
        }

        .dark-section .container-site {
            position: relative;
            z-index: 1;
        }

        .faq-accordion {
            border-bottom: 1px solid var(--border);
        }

        .faq-accordion:last-child {
            border-bottom: none;
        }

        .faq-btn {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 1rem;
            padding: 1.2rem 0;
            background: none;
            border: none;
            font-size: 1rem;
            font-weight: 600;
            text-align: left;
            cursor: pointer;
            color: var(--ink);
            transition: color .25s;
        }

        .faq-btn:hover {
            color: var(--primary);
        }

        .faq-btn .fa-chevron-down {
            transition: transform .35s ease;
            color: var(--accent);
            font-size: .85rem;
        }

        .faq-item.open .faq-btn .fa-chevron-down {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .faq-answer-inner {
            padding: 0 0 1.25rem;
            color: var(--muted);
            font-size: .95rem;
            line-height: 1.75;
        }

        .cta-panel {
            background: linear-gradient(135deg, #1d2b4f 0%, #2a3d68 100%);
            border-radius: var(--radius);
            padding: clamp(2rem, 5vw, 3.5rem);
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .cta-panel::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(201, 162, 94, .25), transparent 65%);
        }

        .cta-panel .btn {
            position: relative;
            z-index: 2;
        }

        .site-footer {
            background: var(--ink);
            color: #8893a8;
            padding-top: 4rem;
        }

        .site-footer .brand-logo {
            color: #fff;
        }

        .site-footer h5 {
            color: #fff;
            font-size: .82rem;
            letter-spacing: .12em;
            text-transform: uppercase;
            font-weight: 700;
            margin-bottom: 1rem;
            opacity: .8;
        }

        .footer-link {
            display: block;
            color: #8893a8;
            font-size: .9rem;
            margin-bottom: .55rem;
            transition: color .25s, padding-left .25s;
        }

        .footer-link:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 1.2rem 0;
            font-size: .85rem;
            color: #6b768b;
        }

        .grid-pattern {
            background-image: radial-gradient(rgba(255, 255, 255, .08) 1px, transparent 1px);
            background-size: 28px 28px;
        }

        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity .7s ease, transform .7s ease;
        }

        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        .img-mask {
            position: relative;
        }

        .img-mask::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(to top, rgba(23, 30, 46, .35), transparent 40%);
            border-radius: inherit;
            pointer-events: none;
        }

        .pagination {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: .5rem;
            margin-top: 2.6rem;
        }

        .pagination a,
        .pagination span {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 40px;
            height: 40px;
            padding: 0 .8rem;
            border-radius: 12px;
            font-size: .9rem;
            border: 1px solid var(--border);
            background: #fff;
            color: #42506b;
            font-weight: 500;
            transition: all .25s;
        }

        .pagination a:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .pagination .current {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }

        @media (max-width: 1023px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 76px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                padding: 1rem;
                gap: .35rem;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 20px 40px -20px rgba(23, 30, 46, .2);
            }

            .nav-links.open {
                display: flex;
            }

            .nav-link {
                padding: .85rem 1.2rem;
                border-radius: 14px;
                justify-content: flex-start;
            }

            .menu-toggle {
                display: inline-flex;
            }

            .header-cta {
                display: none;
            }
        }

        @media (max-width: 640px) {
            .header-inner {
                height: 64px;
            }

            .nav-links {
                top: 64px;
            }

            .brand-logo {
                font-size: 1.05rem;
            }

            .logo-mark {
                width: 34px;
                height: 34px;
                font-size: .75rem;
                border-radius: 10px;
            }

            .timeline-wrap {
                padding-left: 1.4rem;
            }

            .timeline-item {
                padding: 1.2rem 1.1rem;
            }

            .timeline-item::before {
                left: -1.1rem;
            }

            .footer-bottom {
                text-align: center;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                transition: none !important;
                scroll-behavior: auto !important;
            }

            .reveal {
                opacity: 1;
                transform: none;
            }
        }

/* roulang page: article */
:root {
            --brand-primary: #1b2559;
            --brand-dark: #0a1024;
            --accent-gold: #d4a853;
            --bg-warm: #f7f6f2;
            --text-main: #1c1a1a;
            --text-weak: #6b7280;
            --border-light: #e8e4de;
            --shadow-soft: 0 12px 40px rgba(0, 0, 0, 0.06);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.05);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
            font-size: 16px;
            line-height: 1.7;
            background-color: var(--bg-warm);
            color: var(--text-main);
            -webkit-font-smoothing: antialiased;
        }
        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid rgba(0, 0, 0, 0.05);
            transition: box-shadow 0.3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 74px;
            gap: 20px;
        }
        .brand-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--brand-primary);
            font-weight: 700;
            font-size: 20px;
            letter-spacing: 0.5px;
            transition: opacity 0.2s;
        }
        .brand-logo:hover {
            opacity: 0.85;
        }
        .logo-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: var(--brand-primary);
            color: #fff;
            border-radius: 12px;
            font-weight: 800;
            font-size: 16px;
            letter-spacing: -0.5px;
            box-shadow: 0 4px 12px rgba(27, 37, 89, 0.2);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-link {
            padding: 8px 16px;
            border-radius: 999px;
            color: #555;
            font-size: 14px;
            font-weight: 500;
            text-decoration: none;
            transition: all 0.2s ease;
        }
        .nav-link:hover {
            background: #f0f0f0;
            color: var(--brand-primary);
        }
        .nav-link.active {
            background: var(--brand-primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(27, 37, 89, 0.2);
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            background: var(--brand-primary);
            color: #fff;
            border-radius: 999px;
            font-weight: 600;
            font-size: 14px;
            text-decoration: none;
            border: none;
            cursor: pointer;
            transition: all 0.25s ease;
            box-shadow: 0 4px 14px rgba(27, 37, 89, 0.18);
        }
        .btn-primary:hover {
            background: #151d47;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(27, 37, 89, 0.25);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 22px;
            border: 2px solid var(--brand-primary);
            color: var(--brand-primary);
            border-radius: 999px;
            font-weight: 600;
            font-size: 14px;
            text-decoration: none;
            background: transparent;
            transition: all 0.25s ease;
        }
        .btn-ghost:hover {
            background: var(--brand-primary);
            color: #fff;
        }
        .btn-light {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: #fff;
            color: var(--brand-primary);
            border-radius: 999px;
            font-weight: 600;
            font-size: 15px;
            text-decoration: none;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
            transition: all 0.25s ease;
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
        }
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--brand-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .menu-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .menu-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .menu-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 600;
            backdrop-filter: blur(8px);
            letter-spacing: 0.5px;
        }
        .badge-solid {
            display: inline-flex;
            align-items: center;
            padding: 5px 14px;
            background: rgba(212, 168, 83, 0.15);
            color: #8a6d2f;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 600;
        }
        .article-hero {
            position: relative;
            padding: 72px 0 64px;
            background-size: cover;
            background-position: center;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(10, 16, 36, 0.95) 0%, rgba(10, 16, 36, 0.75) 50%, rgba(10, 16, 36, 0.4) 100%);
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 20px;
        }
        .breadcrumb a {
            color: rgba(255, 255, 255, 0.6);
            text-decoration: none;
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: #fff;
        }
        .article-content {
            font-size: 17px;
            line-height: 1.95;
            color: #3a3a3a;
            word-wrap: break-word;
        }
        .article-content > * + * {
            margin-top: 1.4em;
        }
        .article-content p {
            margin-bottom: 1.2em;
        }
        .article-content h2 {
            font-size: 24px;
            font-weight: 700;
            color: #1a1a2e;
            margin-top: 2.2em;
            margin-bottom: 0.8em;
            padding-bottom: 0.5em;
            border-bottom: 2px solid #f0ede8;
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 600;
            color: #1a1a2e;
            margin-top: 2em;
            margin-bottom: 0.6em;
        }
        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: #1a1a2e;
            margin-top: 1.6em;
        }
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            margin: 1.8em 0;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent-gold);
            background: #faf6ef;
            padding: 1.2em 1.6em;
            border-radius: 0 12px 12px 0;
            font-style: italic;
            color: #666;
            margin: 1.8em 0;
        }
        .article-content blockquote p {
            margin-bottom: 0;
        }
        .article-content ul {
            list-style: disc;
            padding-left: 1.6em;
            margin: 1.2em 0;
        }
        .article-content ol {
            list-style: decimal;
            padding-left: 1.6em;
            margin: 1.2em 0;
        }
        .article-content li {
            margin-bottom: 0.5em;
        }
        .article-content a {
            color: var(--brand-primary);
            text-decoration: underline;
            text-underline-offset: 2px;
        }
        .article-content pre {
            background: #0a1024;
            color: #e2e8f0;
            padding: 1.5em 1.8em;
            border-radius: 12px;
            overflow-x: auto;
            font-size: 14px;
            line-height: 1.7;
            margin: 1.8em 0;
        }
        .article-content code {
            font-family: 'SF Mono', 'Fira Code', Consolas, monospace;
            font-size: 0.9em;
        }
        .article-content p code {
            background: #f0ede8;
            padding: 0.2em 0.4em;
            border-radius: 4px;
            font-size: 0.85em;
        }
        .article-content pre code {
            background: none;
            padding: 0;
            color: inherit;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.8em 0;
            font-size: 15px;
        }
        .article-content th,
        .article-content td {
            border: 1px solid #e8e4de;
            padding: 12px 16px;
            text-align: left;
        }
        .article-content th {
            background: #f8f7f4;
            font-weight: 600;
            color: #1a1a2e;
        }
        .article-content hr {
            border: none;
            height: 1px;
            background: #e8e4de;
            margin: 2.5em 0;
        }
        .card-item {
            background: #fff;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        .card-item:hover {
            transform: translateY(-4px);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.1);
        }
        .tag-item {
            display: inline-block;
            padding: 6px 14px;
            background: #f5f3ef;
            color: #555;
            border-radius: 999px;
            font-size: 13px;
            font-weight: 500;
            transition: all 0.2s;
        }
        .tag-item:hover {
            background: var(--brand-primary);
            color: #fff;
        }
        .footer-link {
            display: block;
            padding: 5px 0;
            color: rgba(255, 255, 255, 0.55);
            font-size: 14px;
            text-decoration: none;
            transition: color 0.2s, transform 0.2s;
        }
        .footer-link:hover {
            color: #fff;
            transform: translateX(3px);
        }
        .site-footer {
            background: #0a1024;
            color: rgba(255, 255, 255, 0.8);
            padding-top: 64px;
        }
        .site-footer h5 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 12px;
            letter-spacing: 1px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0;
            text-align: center;
        }
        .faq-item {
            background: #fff;
            border-radius: var(--radius-md);
            padding: 0;
            box-shadow: var(--shadow-card);
            transition: box-shadow 0.3s;
        }
        .faq-item:hover {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }
        .faq-item summary {
            padding: 20px 24px;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-main);
            cursor: pointer;
            list-style: none;
            position: relative;
            padding-right: 48px;
            border-radius: var(--radius-md);
            transition: background 0.2s;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item summary::after {
            content: '+';
            position: absolute;
            right: 24px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 22px;
            font-weight: 300;
            color: var(--brand-primary);
            transition: transform 0.3s;
        }
        .faq-item[open] summary::after {
            content: '−';
            transform: translateY(-50%);
        }
        .faq-item .faq-body {
            padding: 0 24px 20px;
            color: #666;
            font-size: 15px;
            line-height: 1.8;
        }
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-link {
                padding: 8px 12px;
                font-size: 13px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 74px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                padding: 16px 20px;
                border-bottom: 1px solid var(--border-light);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08);
                gap: 4px;
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 12px;
            }
            .menu-toggle {
                display: flex;
            }
            .header-actions .btn-primary {
                display: none;
            }
            .article-hero {
                padding: 56px 0 48px;
            }
        }
        @media (max-width: 520px) {
            .container-site {
                padding-left: 16px;
                padding-right: 16px;
            }
            .header-inner {
                height: 64px;
            }
            .nav-links {
                top: 64px;
            }
            .article-content {
                font-size: 16px;
                line-height: 1.8;
            }
        }
        @media (min-width: 769px) {
            .nav-links {
                display: flex !important;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #1e3a5f;
            --primary-light: #2c5282;
            --primary-dark: #142d4c;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --bg: #f8fafc;
            --text-main: #1e293b;
            --text-weak: #64748b;
            --border: #e2e8f0;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --shadow-card: 0 4px 20px rgba(30, 58, 95, 0.08);
            --shadow-hover: 0 12px 32px rgba(30, 58, 95, 0.14);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            font-family: 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
            background-color: var(--bg);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: all 0.3s ease;
        }
        a:focus-visible {
            outline: 3px solid rgba(245, 158, 11, 0.5);
            outline-offset: 2px;
            border-radius: 4px;
        }
        button {
            cursor: pointer;
            font-family: inherit;
        }
        .container-site {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* ========= Header / Nav ========= */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.7);
            transition: box-shadow 0.3s;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 1.5rem;
        }
        .brand-logo {
            display: inline-flex;
            align-items: center;
            gap: 0.6rem;
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
        }
        .logo-mark {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
            color: #fff;
            border-radius: 10px;
            font-size: 0.9rem;
            font-weight: 900;
            letter-spacing: 0;
            box-shadow: 0 4px 12px rgba(30, 58, 95, 0.25);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 0.4rem;
        }
        .nav-link {
            padding: 0.6rem 1.1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: #475569;
            border-radius: 8px;
            transition: all 0.3s ease;
            position: relative;
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(30, 58, 95, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            left: 1.1rem;
            right: 1.1rem;
            bottom: 0.15rem;
            height: 3px;
            background: var(--accent);
            border-radius: 3px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            background: var(--primary);
            color: #fff !important;
            padding: 0.55rem 1.4rem;
            border-radius: 10px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 14px rgba(30, 58, 95, 0.25);
            transition: all 0.3s ease;
            border: none;
            line-height: 1.4;
        }
        .nav-cta:hover {
            background: var(--primary-light);
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(30, 58, 95, 0.32);
        }
        .nav-cta i {
            font-size: 0.9rem;
        }
        .nav-toggle {
            display: none;
            width: 42px;
            height: 42px;
            border: 1px solid var(--border);
            border-radius: 10px;
            background: #fff;
            align-items: center;
            justify-content: center;
            transition: all 0.3s;
        }
        .nav-toggle:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .nav-toggle svg {
            width: 22px;
            height: 22px;
        }
        .mobile-menu {
            display: none;
            flex-direction: column;
            padding: 0.8rem 1.5rem 1.2rem;
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .mobile-menu.open {
            display: flex;
        }
        .mobile-menu .nav-link {
            padding: 0.75rem 0.8rem;
            border-radius: 8px;
            font-size: 1rem;
        }
        .mobile-menu .nav-link.active {
            background: rgba(30, 58, 95, 0.06);
        }
        .mobile-menu .nav-cta {
            margin-top: 0.5rem;
            justify-content: center;
            padding: 0.75rem;
        }

        /* ========= Page Banner ========= */
        .page-banner {
            position: relative;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            padding: 7rem 0 5rem;
            overflow: hidden;
        }
        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(100deg, rgba(20, 45, 76, 0.92) 0%, rgba(30, 58, 95, 0.78) 50%, rgba(30, 58, 95, 0.4) 100%);
        }
        .page-banner .container-site {
            position: relative;
            z-index: 2;
        }
        .banner-tag {
            display: inline-block;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            padding: 0.3rem 0.9rem;
            border-radius: 30px;
            font-size: 0.8rem;
            letter-spacing: 0.05em;
            margin-bottom: 1.2rem;
            font-weight: 500;
        }
        .page-banner h1 {
            color: #fff;
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin: 0 0 1.2rem;
            max-width: 680px;
        }
        .page-banner .banner-desc {
            color: rgba(255, 255, 255, 0.85);
            font-size: 1.15rem;
            max-width: 560px;
            line-height: 1.8;
        }
        .banner-actions {
            display: flex;
            gap: 1rem;
            margin-top: 2rem;
            flex-wrap: wrap;
        }
        .btn-light {
            background: #fff;
            color: var(--primary);
            padding: 0.7rem 1.8rem;
            border-radius: 10px;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.15);
            transition: all 0.3s;
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
        }
        .btn-light:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
        }
        .btn-outline-light {
            background: transparent;
            color: #fff;
            border: 1.5px solid rgba(255, 255, 255, 0.6);
            padding: 0.7rem 1.8rem;
            border-radius: 10px;
            font-weight: 500;
            transition: all 0.3s;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
        }

        /* ========= Section Common ========= */
        .section-pad {
            padding: 5rem 0;
        }
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 3.5rem;
        }
        .section-tag {
            display: inline-block;
            color: var(--accent-dark);
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.1em;
            text-transform: uppercase;
            background: rgba(245, 158, 11, 0.1);
            border: 1px solid rgba(245, 158, 11, 0.25);
            padding: 0.25rem 0.9rem;
            border-radius: 20px;
            margin-bottom: 1rem;
        }
        .section-head h2 {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-main);
            line-height: 1.25;
            margin: 0 0 1rem;
            letter-spacing: -0.02em;
        }
        .section-head p {
            color: var(--text-weak);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        /* ========= Service Overview ========= */
        .overview-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }
        .overview-image {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
            position: relative;
        }
        .overview-image img {
            width: 100%;
            height: 420px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .overview-image:hover img {
            transform: scale(1.03);
        }
        .overview-content h3 {
            font-size: 1.7rem;
            font-weight: 700;
            line-height: 1.35;
            color: var(--primary);
            margin: 0 0 1.2rem;
        }
        .overview-content p {
            color: var(--text-weak);
            font-size: 1rem;
            line-height: 1.85;
            margin-bottom: 1.2rem;
        }
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 1.5rem 0 0;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
            padding: 0.65rem 0;
            font-size: 0.98rem;
            color: #334155;
        }
        .feature-icon {
            width: 32px;
            height: 32px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            background: rgba(30, 58, 95, 0.08);
            border-radius: 8px;
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 700;
        }

        /* ========= Service Cards ========= */
        .service-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.35s ease;
            border: 1px solid rgba(226, 232, 240, 0.6);
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: rgba(30, 58, 95, 0.15);
        }
        .service-card-image {
            position: relative;
            overflow: hidden;
            height: 220px;
        }
        .service-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.45s ease;
        }
        .service-card:hover .service-card-image img {
            transform: scale(1.06);
        }
        .service-card-image .badge {
            position: absolute;
            top: 1rem;
            left: 1rem;
            background: rgba(255, 255, 255, 0.95);
            color: var(--primary);
            padding: 0.25rem 0.8rem;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
        }
        .service-card-body {
            padding: 1.6rem 1.6rem 2rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .service-card-body h3 {
            font-size: 1.18rem;
            font-weight: 700;
            margin: 0 0 0.6rem;
            color: var(--text-main);
        }
        .service-card-body p {
            color: var(--text-weak);
            font-size: 0.92rem;
            line-height: 1.75;
            flex-grow: 1;
            margin-bottom: 1rem;
        }
        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
        }
        .card-link:hover {
            color: var(--accent-dark);
            gap: 0.6rem;
        }

        /* ========= Deep Dive ========= */
        .deep-section {
            background: linear-gradient(180deg, #f8fafc 0%, #ffffff 100%);
        }
        .deep-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3.5rem;
            align-items: center;
            padding: 2.5rem 0;
        }
        .deep-block.reverse .deep-image {
            order: 2;
        }
        .deep-block.reverse .deep-text {
            order: 1;
        }
        .deep-image {
            border-radius: var(--radius-xl);
            overflow: hidden;
            box-shadow: var(--shadow-hover);
        }
        .deep-image img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform 0.5s;
        }
        .deep-image:hover img {
            transform: scale(1.04);
        }
        .deep-text h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin: 0 0 1rem;
            color: var(--primary);
        }
        .deep-text p {
            color: var(--text-weak);
            line-height: 1.85;
            margin-bottom: 1.2rem;
            font-size: 0.98rem;
        }
        .tech-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            margin-top: 1.2rem;
        }
        .tech-tag {
            background: rgba(30, 58, 95, 0.06);
            border: 1px solid rgba(30, 58, 95, 0.1);
            padding: 0.3rem 0.9rem;
            border-radius: 20px;
            font-size: 0.82rem;
            color: var(--primary);
            font-weight: 500;
        }

        /* ========= Process ========= */
        .process-bg {
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            position: relative;
        }
        .process-bg::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(20, 45, 76, 0.92);
        }
        .process-bg .container-site {
            position: relative;
            z-index: 2;
        }
        .process-bg .section-head h2 {
            color: #fff;
        }
        .process-bg .section-head p {
            color: rgba(255, 255, 255, 0.7);
        }
        .process-bg .section-tag {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.2);
            color: var(--accent-light);
        }
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            margin-top: 1rem;
        }
        .process-card {
            background: rgba(255, 255, 255, 0.08);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            text-align: center;
            transition: all 0.3s;
        }
        .process-card:hover {
            background: rgba(255, 255, 255, 0.15);
            transform: translateY(-4px);
        }
        .process-num {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent);
            display: block;
            margin-bottom: 0.8rem;
            line-height: 1;
        }
        .process-card h4 {
            color: #fff;
            font-size: 1.05rem;
            font-weight: 600;
            margin: 0 0 0.6rem;
        }
        .process-card p {
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.85rem;
            line-height: 1.7;
        }

        /* ========= Stats ========= */
        .stats-band {
            background: #fff;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 2rem;
            text-align: center;
            padding: 3.5rem 0;
        }
        .stat-item .num {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }
        .stat-item .num span {
            color: var(--accent);
        }
        .stat-item .label {
            color: var(--text-weak);
            font-size: 0.92rem;
            margin-top: 0.4rem;
        }

        /* ========= FAQ ========= */
        .faq-list {
            max-width: 760px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 14px;
            margin-bottom: 1rem;
            overflow: hidden;
            transition: all 0.3s;
        }
        .faq-item:hover {
            border-color: rgba(30, 58, 95, 0.2);
            box-shadow: 0 4px 14px rgba(0, 0, 0, 0.04);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 1.1rem 1.5rem;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            background: none;
            border: none;
            text-align: left;
            width: 100%;
            gap: 1rem;
            transition: color 0.3s;
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-question .icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: rgba(30, 58, 95, 0.08);
            color: var(--primary);
            font-size: 0.9rem;
            transition: all 0.3s;
            font-style: normal;
        }
        .faq-item.active .faq-question .icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            padding: 0 1.5rem;
            overflow: hidden;
            transition: all 0.4s ease;
            color: var(--text-weak);
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 1.5rem 1.3rem;
        }

        /* ========= CTA ========= */
        .cta-band {
            background: linear-gradient(135deg, var(--primary) 0%, #2c5282 60%, #1e3a5f 100%);
            padding: 4.5rem 0;
            position: relative;
            overflow: hidden;
        }
        .cta-band::before {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: rgba(245, 158, 11, 0.1);
            border-radius: 50%;
            top: -150px;
            right: -100px;
        }
        .cta-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }
        .cta-text h2 {
            color: #fff;
            font-size: 1.9rem;
            font-weight: 700;
            margin: 0 0 0.6rem;
        }
        .cta-text p {
            color: rgba(255, 255, 255, 0.75);
            font-size: 1rem;
            max-width: 480px;
        }
        .cta-btn {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            background: var(--accent);
            color: var(--primary-dark) !important;
            padding: 0.8rem 2rem;
            border-radius: 12px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 6px 20px rgba(245, 158, 11, 0.35);
            transition: all 0.3s;
        }
        .cta-btn:hover {
            background: var(--accent-light);
            transform: translateY(-3px);
            box-shadow: 0 10px 28px rgba(245, 158, 11, 0.45);
        }

        /* ========= Related ========= */
        .related-card {
            background: #fff;
            border-radius: 14px;
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all 0.3s;
            border: 1px solid rgba(226, 232, 240, 0.6);
            height: 100%;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-hover);
        }
        .related-card img {
            height: 180px;
            width: 100%;
            object-fit: cover;
        }
        .related-body {
            padding: 1.5rem;
        }
        .related-body .date {
            font-size: 0.8rem;
            color: var(--text-weak);
        }
        .related-body h4 {
            font-size: 1.05rem;
            font-weight: 600;
            margin: 0.5rem 0 0.4rem;
            line-height: 1.5;
            color: var(--text-main);
        }
        .related-body p {
            font-size: 0.88rem;
            color: var(--text-weak);
            line-height: 1.7;
            margin: 0;
        }

        /* ========= Footer ========= */
        .site-footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.8);
            padding: 4rem 0 0;
        }
        .site-footer h5 {
            color: #fff;
            font-size: 0.95rem;
            font-weight: 600;
            margin: 0 0 1.2rem;
            letter-spacing: 0.02em;
        }
        .site-footer .brand-logo {
            color: #fff;
        }
        .site-footer .brand-logo .logo-mark {
            background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
            color: var(--primary-dark);
        }
        .footer-link {
            display: block;
            color: rgba(255, 255, 255, 0.55);
            font-size: 0.9rem;
            padding: 0.35rem 0;
            transition: all 0.3s;
        }
        .footer-link:hover {
            color: var(--accent-light);
            padding-left: 4px;
        }
        .footer-bottom {
            margin-top: 3rem;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 1.5rem 0;
            font-size: 0.82rem;
            color: rgba(255, 255, 255, 0.35);
        }

        /* ========= Responsive ========= */
        @media (max-width: 1024px) {
            .page-banner h1 {
                font-size: 2.4rem;
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .overview-grid {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .deep-block {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .deep-block.reverse .deep-image {
                order: 1;
            }
            .deep-block.reverse .deep-text {
                order: 2;
            }
        }
        @media (max-width: 768px) {
            .site-header {
                height: 64px;
            }
            .header-inner {
                height: 64px;
            }
            .nav-links {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-cta.desktop-only {
                display: none;
            }
            .page-banner {
                padding: 5rem 0 3.5rem;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner .banner-desc {
                font-size: 1rem;
            }
            .section-pad {
                padding: 3.5rem 0;
            }
            .section-head h2 {
                font-size: 1.7rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 1.5rem;
                padding: 2.5rem 0;
            }
            .cta-inner {
                flex-direction: column;
                align-items: flex-start;
            }
            .overview-image img {
                height: 280px;
            }
        }
        @media (max-width: 520px) {
            .container-site {
                padding: 0 1.1rem;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .process-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .deep-image img {
                height: 220px;
            }
            .service-card-image {
                height: 180px;
            }
            .section-head h2 {
                font-size: 1.5rem;
            }
        }

/* roulang page: category3 */
:root {
      --primary: #0e3a47;
      --primary-deep: #082730;
      --primary-light: #1a5a6e;
      --accent: #c9962e;
      --accent-light: #e0b45c;
      --bg: #f7f4ee;
      --surface: #ffffff;
      --text: #1c2b33;
      --text-weak: #5b6b73;
      --border: rgba(14, 58, 71, 0.12);
      --radius-sm: 10px;
      --radius-md: 18px;
      --radius-lg: 30px;
      --shadow-sm: 0 2px 10px rgba(14, 58, 71, 0.06);
      --shadow-md: 0 12px 36px rgba(14, 58, 71, 0.08);
      --shadow-lg: 0 24px 70px rgba(14, 58, 71, 0.13);
      --container: 1200px;
      --space-section: 96px;
    }

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

    html { scroll-behavior: smooth; }

    body {
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
      text-rendering: optimizeLegibility;
    }

    img { max-width: 100%; display: block; }
    a { text-decoration: none; color: inherit; transition: color 0.25s ease; }
    button { font-family: inherit; cursor: pointer; }
    input, textarea { font-family: inherit; }

    .container-site {
      max-width: var(--container);
      margin: 0 auto;
      padding: 0 24px;
    }

    .section { padding: var(--space-section) 0; }
    .section-tight { padding: 64px 0; }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--accent);
      background: rgba(201, 150, 46, 0.1);
      border: 1px solid rgba(201, 150, 46, 0.25);
      padding: 6px 14px;
      border-radius: 999px;
    }

    .section-head {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 56px;
    }

    .section-head h2 {
      font-size: clamp(28px, 4vw, 40px);
      font-weight: 800;
      letter-spacing: -0.02em;
      line-height: 1.25;
      color: var(--primary-deep);
      margin: 16px 0 12px;
    }

    .section-head p {
      color: var(--text-weak);
      font-size: 16px;
      line-height: 1.8;
    }

    /* ===== Header / Nav ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(18px);
      -webkit-backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
      gap: 24px;
    }

    .brand-logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #fff;
      font-weight: 800;
      font-size: 15px;
      letter-spacing: 0.5px;
      box-shadow: 0 4px 14px rgba(14, 58, 71, 0.25);
    }

    .logo-text {
      font-size: 19px;
      font-weight: 800;
      color: var(--primary-deep);
      letter-spacing: -0.01em;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0 auto;
    }

    .nav-link {
      position: relative;
      padding: 10px 16px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text);
      border-radius: 10px;
      transition: all 0.25s ease;
    }

    .nav-link::after {
      content: "";
      position: absolute;
      left: 16px;
      right: 16px;
      bottom: 4px;
      height: 2px;
      border-radius: 2px;
      background: linear-gradient(90deg, var(--accent), var(--accent-light));
      transform: scaleX(0);
      transform-origin: left;
      transition: transform 0.3s ease;
    }

    .nav-link:hover {
      color: var(--primary);
      background: rgba(14, 58, 71, 0.05);
    }

    .nav-link:hover::after { transform: scaleX(1); }

    .nav-link.active {
      color: var(--primary);
      background: rgba(14, 58, 71, 0.06);
    }

    .nav-link.active::after { transform: scaleX(1); }

    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 11px 22px;
      background: linear-gradient(135deg, var(--accent), var(--accent-light));
      color: var(--primary-deep);
      font-size: 14px;
      font-weight: 700;
      border-radius: 999px;
      box-shadow: 0 4px 16px rgba(201, 150, 46, 0.28);
      transition: all 0.3s ease;
      white-space: nowrap;
    }

    .nav-cta:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(201, 150, 46, 0.36);
      color: var(--primary-deep);
    }

    .nav-cta i { font-size: 13px; }

    .nav-toggle {
      display: none;
      width: 44px;
      height: 44px;
      border: 1px solid var(--border);
      border-radius: 12px;
      background: var(--surface);
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 5px;
    }

    .nav-toggle span {
      display: block;
      width: 18px;
      height: 2px;
      background: var(--primary);
      border-radius: 2px;
      transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.open span:nth-child(2) { opacity: 0; }
    .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

    /* ===== Hero ===== */
    .page-hero {
      position: relative;
      padding: 140px 0 180px;
      background-size: cover;
      background-position: center;
      color: #fff;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.22);
      backdrop-filter: blur(8px);
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.06em;
      color: #f5e8cf;
      margin-bottom: 28px;
    }

    .page-hero h1 {
      font-size: clamp(34px, 5.6vw, 58px);
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      max-width: 720px;
      margin-bottom: 22px;
      text-shadow: 0 4px 30px rgba(0, 0, 0, 0.25);
    }

    .page-hero .hero-desc {
      font-size: 17px;
      line-height: 1.85;
      max-width: 600px;
      color: rgba(255, 255, 255, 0.82);
      margin-bottom: 36px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 30px;
      border-radius: 999px;
      font-size: 15px;
      font-weight: 700;
      transition: all 0.3s ease;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), var(--accent-light));
      color: var(--primary-deep);
      box-shadow: 0 6px 22px rgba(201, 150, 46, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 30px rgba(201, 150, 46, 0.4);
      color: var(--primary-deep);
    }

    .btn-ghost {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.35);
      color: #fff;
      backdrop-filter: blur(6px);
    }

    .btn-ghost:hover {
      background: rgba(255, 255, 255, 0.2);
      border-color: rgba(255, 255, 255, 0.6);
      color: #fff;
    }

    /* ===== Stats ===== */
    .stats-float {
      margin-top: -100px;
      position: relative;
      z-index: 10;
    }

    .stats-card-wrap {
      background: var(--surface);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-lg);
      padding: 36px 28px;
      border: 1px solid rgba(255, 255, 255, 0.6);
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
    }

    .stat-item {
      text-align: center;
      position: relative;
    }

    .stat-item + .stat-item::before {
      content: "";
      position: absolute;
      left: -15px;
      top: 20%;
      bottom: 20%;
      width: 1px;
      background: var(--border);
    }

    .stat-item strong {
      display: block;
      font-size: 44px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.02em;
      line-height: 1.1;
    }

    .stat-item span {
      display: block;
      margin-top: 6px;
      font-size: 14px;
      color: var(--text-weak);
      font-weight: 500;
    }

    /* ===== Filter Tabs ===== */
    .filter-tabs {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-bottom: 48px;
    }

    .filter-tab {
      padding: 10px 22px;
      border-radius: 999px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text);
      background: var(--surface);
      border: 1px solid var(--border);
      transition: all 0.3s ease;
    }

    .filter-tab:hover {
      border-color: var(--accent);
      color: var(--primary);
    }

    .filter-tab.active {
      background: var(--primary);
      border-color: var(--primary);
      color: #fff;
      box-shadow: 0 6px 18px rgba(14, 58, 71, 0.22);
    }

    /* ===== Case Cards ===== */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .case-card {
      background: var(--surface);
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow-sm);
      transition: transform 0.35s ease, box-shadow 0.35s ease;
      display: flex;
      flex-direction: column;
    }

    .case-card:hover {
      transform: translateY(-8px);
      box-shadow: var(--shadow-lg);
    }

    .case-cover {
      position: relative;
      aspect-ratio: 16 / 10;
      overflow: hidden;
    }

    .case-cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.6s ease;
    }

    .case-card:hover .case-cover img {
      transform: scale(1.06);
    }

    .case-cover::after {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 55%, rgba(8, 39, 48, 0.5));
    }

    .case-tag {
      position: absolute;
      top: 16px;
      left: 16px;
      z-index: 2;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(8px);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    }

    .case-body {
      padding: 26px 26px 28px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .case-body h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .case-body p {
      font-size: 14px;
      color: var(--text-weak);
      line-height: 1.75;
      margin-bottom: 18px;
      flex: 1;
    }

    .case-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 18px;
    }

    .case-meta span {
      font-size: 12px;
      color: var(--text-weak);
      background: rgba(14, 58, 71, 0.05);
      border: 1px solid rgba(14, 58, 71, 0.08);
      padding: 4px 12px;
      border-radius: 999px;
      font-weight: 500;
    }

    .case-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
      transition: gap 0.25s ease, color 0.25s ease;
    }

    .case-link:hover {
      gap: 10px;
      color: var(--accent);
    }

    /* ===== Process ===== */
    .process-section {
      background: var(--primary-deep);
      color: #fff;
      position: relative;
      overflow: hidden;
    }

    .process-section::before {
      content: "";
      position: absolute;
      top: 0;
      right: 0;
      width: 420px;
      height: 420px;
      background: radial-gradient(circle, rgba(201, 150, 46, 0.2) 0%, transparent 70%);
    }

    .process-section .section-tag {
      background: rgba(201, 150, 46, 0.18);
      border-color: rgba(201, 150, 46, 0.35);
    }

    .process-section .section-head h2 { color: #fff; }
    .process-section .section-head p { color: rgba(255, 255, 255, 0.6); }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 20px;
    }

    .process-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-md);
      padding: 28px 22px;
      transition: background 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
    }

    .process-item:hover {
      background: rgba(255, 255, 255, 0.08);
      border-color: rgba(201, 150, 46, 0.4);
      transform: translateY(-6px);
    }

    .process-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 52px;
      height: 52px;
      border-radius: 16px;
      background: linear-gradient(135deg, var(--accent), var(--accent-light));
      color: var(--primary-deep);
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 18px;
    }

    .process-item h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #fff;
    }

    .process-item p {
      font-size: 13px;
      line-height: 1.7;
      color: rgba(255, 255, 255, 0.6);
    }

    /* ===== Testimonials ===== */
    .testi-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 28px;
    }

    .testi-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: box-shadow 0.3s ease, transform 0.3s ease;
    }

    .testi-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .testi-stars {
      color: var(--accent);
      font-size: 14px;
      letter-spacing: 3px;
      margin-bottom: 18px;
    }

    .testi-card blockquote {
      font-size: 15px;
      line-height: 1.8;
      color: var(--text);
      margin-bottom: 22px;
    }

    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 14px;
      font-weight: 700;
    }

    .testi-author strong {
      display: block;
      font-size: 14px;
      color: var(--primary-deep);
    }

    .testi-author span {
      font-size: 12px;
      color: var(--text-weak);
    }

    /* ===== FAQ ===== */
    .faq-wrap {
      max-width: 820px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      margin-bottom: 16px;
      overflow: hidden;
      transition: border-color 0.3s ease, box-shadow 0.3s ease;
    }

    .faq-item:hover {
      border-color: rgba(201, 150, 46, 0.35);
      box-shadow: var(--shadow-sm);
    }

    .faq-item summary {
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 22px 26px;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: var(--primary-deep);
    }

    .faq-item summary::-webkit-details-marker { display: none; }

    .faq-item summary::after {
      content: "\f078";
      font-family: "Font Awesome 6 Free";
      font-weight: 900;
      font-size: 13px;
      color: var(--accent);
      transition: transform 0.3s ease;
      flex-shrink: 0;
    }

    .faq-item[open] summary::after {
      transform: rotate(180deg);
    }

    .faq-answer {
      padding: 0 26px 24px;
      font-size: 15px;
      color: var(--text-weak);
      line-height: 1.8;
    }

    /* ===== CTA ===== */
    .cta-section {
      background-size: cover;
      background-position: center;
      position: relative;
    }

    .cta-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(120deg, rgba(8, 39, 48, 0.94), rgba(14, 58, 71, 0.82));
    }

    .cta-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 90px 20px;
      color: #fff;
      max-width: 700px;
      margin: 0 auto;
    }

    .cta-inner h2 {
      font-size: clamp(28px, 4vw, 42px);
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 16px;
    }

    .cta-inner p {
      color: rgba(255, 255, 255, 0.75);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 34px;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 14px;
    }

    .btn-light {
      background: #fff;
      color: var(--primary-deep);
    }

    .btn-light:hover {
      transform: translateY(-3px);
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
      color: var(--primary-deep);
    }

    .btn-outline-light {
      border: 1px solid rgba(255, 255, 255, 0.5);
      color: #fff;
      background: transparent;
    }

    .btn-outline-light:hover {
      background: rgba(255, 255, 255, 0.12);
      border-color: #fff;
      color: #fff;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--primary-deep);
      color: #fff;
      padding-top: 70px;
    }

    .site-footer h5 {
      font-size: 14px;
      font-weight: 700;
      color: rgba(255, 255, 255, 0.9);
      margin-bottom: 16px;
      letter-spacing: 0.04em;
    }

    .footer-link {
      display: block;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.5);
      padding: 5px 0;
      transition: color 0.25s ease, padding-left 0.25s ease;
    }

    .footer-link:hover {
      color: var(--accent-light);
      padding-left: 4px;
    }

    .footer-bottom {
      margin-top: 50px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 22px 0;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.42);
      text-align: center;
    }

    .brand-logo .logo-mark {
      background: linear-gradient(135deg, var(--accent), var(--accent-light));
      color: var(--primary-deep);
    }

    .brand-logo .logo-text {
      color: #fff;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .cases-grid { grid-template-columns: repeat(2, 1fr); }
      .process-grid { grid-template-columns: repeat(3, 1fr); }
      .testi-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }

      .stat-item + .stat-item::before { display: none; }

      .nav-links {
        position: fixed;
        top: 76px;
        right: 0;
        width: 260px;
        height: calc(100vh - 76px);
        background: var(--surface);
        flex-direction: column;
        align-items: flex-start;
        padding: 30px 24px;
        gap: 4px;
        box-shadow: -20px 0 60px rgba(14, 58, 71, 0.14);
        transform: translateX(100%);
        transition: transform 0.35s ease;
        z-index: 99;
        margin: 0;
      }

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

      .nav-link {
        width: 100%;
        padding: 14px 16px;
        font-size: 16px;
        border-radius: 12px;
      }

      .nav-link::after { display: none; }

      .nav-link.active {
        background: rgba(14, 58, 71, 0.08);
      }

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

      .header-actions { display: flex; align-items: center; gap: 12px; }

      .nav-cta { display: none; }
    }

    @media (max-width: 768px) {
      :root { --space-section: 64px; }

      .page-hero { padding: 110px 0 150px; }
      .page-hero h1 { font-size: 34px; }
      .hero-desc { font-size: 15px; }

      .cases-grid { grid-template-columns: 1fr; }
      .process-grid { grid-template-columns: 1fr; }
      .testi-grid { grid-template-columns: 1fr; }

      .section-head { margin-bottom: 40px; }
    }

    @media (max-width: 520px) {
      .container-site { padding: 0 18px; }

      .header-inner { height: 64px; }
      .nav-links { top: 64px; height: calc(100vh - 64px); }

      .logo-mark { width: 36px; height: 36px; font-size: 13px; border-radius: 10px; }
      .logo-text { font-size: 17px; }

      .stats-float { margin-top: -60px; }
      .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
      .stat-item strong { font-size: 34px; }

      .filter-tabs { gap: 8px; }
      .filter-tab { padding: 8px 16px; font-size: 13px; }

      .case-body { padding: 22px 20px; }
      .faq-item summary { padding: 18px 18px; font-size: 15px; }
      .faq-answer { padding: 0 18px 20px; }
    }

    @media (prefers-reduced-motion: reduce) {
      * { animation: none !important; transition: none !important; }
      html { scroll-behavior: auto; }
    }