/* roulang page: index */
:root {
      --primary-color: #1a2a3a;
      --secondary-color: #c98836;
      --accent-color: #0d7377;
      --accent-light: #eef7f7;
      --bg-light: #f8fafc;
      --bg-white: #ffffff;
      --bg-dark: #0f172a;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 4px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.06);
      --shadow-hover: 0 16px 36px rgba(13,115,119,0.12);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * { box-sizing: border-box; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      margin: 0;
      padding: 0;
      line-height: 1.7;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--secondary-color); }
    
    .site-header {
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--primary-color);
      letter-spacing: -0.5px;
    }
    .brand-logo i { color: var(--secondary-color); font-size: 1.6rem; }
    .nav-actions { display: flex; align-items: center; gap: 20px; }
    .nav-links { display: flex; gap: 24px; list-style: none; margin: 0; padding: 0; }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
    }
    .nav-links a.active, .nav-links a:hover {
      color: var(--accent-color);
      background: var(--accent-light);
    }
    .btn-header {
      background: var(--primary-color);
      color: #fff !important;
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border: 1px solid transparent;
    }
    .btn-header:hover {
      background: var(--secondary-color);
      box-shadow: 0 4px 12px rgba(201,136,54,0.3);
    }

    .section-wrap { padding: 80px 0; border-bottom: 1px solid #f1f5f9; }
    .section-wrap.alt-bg { background-color: var(--bg-light); }
    .section-wrap.dark-bg { background-color: var(--bg-dark); color: #fff; }
    
    .section-header { margin-bottom: 48px; text-align: center; }
    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      color: var(--accent-color);
      background: var(--accent-light);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .dark-bg .section-tag { background: rgba(255,255,255,0.1); color: var(--secondary-color); }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    .dark-bg .section-title { color: #fff; }
    .section-desc {
      max-width: 760px;
      margin: 0 auto;
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.8;
    }
    .dark-bg .section-desc { color: #94a3b8; }

    .hero-section {
      background: radial-gradient(circle at 80% 20%, rgba(201,136,54,0.06), transparent 50%),
                  radial-gradient(circle at 10% 90%, rgba(13,115,119,0.06), transparent 50%),
                  var(--bg-white);
      padding: 90px 0 70px;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-h1 {
      font-size: 2.7rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--primary-color);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-lead {
      font-size: 1.1rem;
      color: #475569;
      line-height: 1.85;
      margin-bottom: 32px;
    }
    .hero-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .countdown-ring {
      display: flex;
      gap: 16px;
      margin-bottom: 28px;
    }
    .countdown-item {
      flex: 1;
      text-align: center;
      background: var(--bg-light);
      border-radius: var(--radius-md);
      padding: 14px 6px;
      border: 1px solid #eef2f6;
    }
    .countdown-num {
      display: block;
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--accent-color);
      line-height: 1;
      margin-bottom: 4px;
    }
    .countdown-lbl { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; }
    .hero-points { list-style: none; margin: 0 0 28px; padding: 0; }
    .hero-points li {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 12px;
      font-size: 0.95rem;
      color: #334155;
    }
    .hero-points li i { color: var(--secondary-color); margin-top: 5px; }
    .btn-hero {
      display: block;
      width: 100%;
      text-align: center;
      background: var(--secondary-color);
      color: #fff;
      padding: 14px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 30px;
      box-shadow: 0 6px 18px rgba(201,136,54,0.3);
    }
    .btn-hero:hover { background: #b37326; color: #fff; transform: translateY(-2px); }

    .kpi-grid { display: flex; flex-wrap: wrap; gap: 24px; margin-top: 20px; }
    .kpi-card {
      flex: 1 1 calc(25% - 18px);
      min-width: 220px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border-top: 4px solid var(--accent-color);
    }
    .kpi-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
    .kpi-val { font-size: 2.2rem; font-weight: 800; color: var(--primary-color); line-height: 1.1; margin-bottom: 8px; }
    .kpi-label { font-size: 1rem; font-weight: 700; color: var(--text-main); margin-bottom: 6px; }
    .kpi-sub { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; margin: 0; }

    .matrix-grid { display: flex; flex-wrap: wrap; gap: 24px; }
    .matrix-item {
      flex: 1 1 calc(33.333% - 16px);
      min-width: 280px;
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      padding: 30px 24px;
      transition: var(--transition);
      position: relative;
    }
    .matrix-item:hover { border-color: var(--accent-color); box-shadow: var(--shadow-md); transform: translateY(-3px); }
    .matrix-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--accent-light);
      color: var(--accent-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
    }
    .matrix-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; color: var(--primary-color); }
    .matrix-desc { font-size: 0.92rem; color: var(--text-muted); line-height: 1.65; margin-bottom: 18px; }
    .matrix-meta { font-size: 0.8rem; font-weight: 600; color: var(--secondary-color); display: flex; align-items: center; gap: 6px; }

    .diff-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .diff-table th, .diff-table td {
      padding: 18px 24px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .diff-table th { background: #f8fafc; font-weight: 700; color: var(--primary-color); }
    .diff-table tr:last-child td { border-bottom: none; }
    .badge-tag {
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 600;
    }
    .badge-tag.verified { background: #e6f4ea; color: #137333; }
    .badge-tag.disputed { background: #fef7e0; color: #b06000; }

    .timeline { position: relative; max-width: 900px; margin: 0 auto; }
    .timeline::before {
      content: '';
      position: absolute;
      left: 30px;
      top: 10px;
      bottom: 10px;
      width: 2px;
      background: #cbd5e1;
    }
    .timeline-item {
      position: relative;
      padding-left: 70px;
      margin-bottom: 36px;
    }
    .timeline-dot {
      position: absolute;
      left: 22px;
      top: 4px;
      width: 18px;
      height: 18px;
      border-radius: 50%;
      background: #fff;
      border: 4px solid var(--secondary-color);
    }
    .timeline-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 24px;
      box-shadow: var(--shadow-sm);
    }
    .timeline-year { font-size: 0.85rem; font-weight: 700; color: var(--secondary-color); margin-bottom: 6px; }
    .timeline-heading { font-size: 1.15rem; font-weight: 700; color: var(--primary-color); margin-bottom: 8px; }
    .timeline-text { font-size: 0.92rem; color: var(--text-muted); line-height: 1.6; margin: 0; }

    .news-grid { display: flex; flex-wrap: wrap; gap: 24px; }
    .news-card {
      flex: 1 1 calc(33.333% - 16px);
      min-width: 280px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }
    .news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--secondary-color); }
    .news-cat { font-size: 0.78rem; font-weight: 700; color: var(--accent-color); margin-bottom: 8px; }
    .news-title { font-size: 1.1rem; font-weight: 700; line-height: 1.45; color: var(--primary-color); margin-bottom: 12px; }
    .news-snippet { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; margin-bottom: 20px; flex-grow: 1; }
    .news-foot { font-size: 0.82rem; color: #94a3b8; display: flex; justify-content: space-between; border-top: 1px solid #f1f5f9; padding-top: 12px; }

    .shield-grid { display: flex; flex-wrap: wrap; gap: 20px; }
    .shield-box {
      flex: 1 1 calc(25% - 15px);
      min-width: 210px;
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-md);
      padding: 26px 20px;
      text-align: center;
    }
    .shield-icon { font-size: 2rem; color: var(--secondary-color); margin-bottom: 16px; }
    .shield-box h4 { font-size: 1.05rem; font-weight: 700; margin-bottom: 10px; color: #fff; }
    .shield-box p { font-size: 0.86rem; color: #94a3b8; line-height: 1.6; margin: 0; }

    .faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
    }
    .faq-item:hover { border-color: var(--accent-color); }
    .faq-q { font-size: 1.08rem; font-weight: 700; color: var(--primary-color); margin-bottom: 10px; display: flex; align-items: center; gap: 10px; }
    .faq-q i { color: var(--secondary-color); font-size: 0.95rem; }
    .faq-a { font-size: 0.93rem; color: #475569; line-height: 1.7; margin: 0; }

    .form-wrap {
      max-width: 720px;
      margin: 0 auto;
      background: #fff;
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }
    .form-field { margin-bottom: 20px; }
    .form-label { display: block; font-size: 0.9rem; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
    .form-input, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      transition: var(--transition);
      background: #fafafa;
    }
    .form-input:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--accent-color);
      background: #fff;
      box-shadow: 0 0 0 3px rgba(13,115,119,0.1);
    }
    .btn-submit {
      width: 100%;
      background: var(--primary-color);
      color: #fff;
      border: none;
      padding: 15px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: 30px;
      cursor: pointer;
      transition: var(--transition);
    }
    .btn-submit:hover { background: var(--secondary-color); }

    .site-footer {
      background: #090e17;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 1px solid rgba(255,255,255,0.08);
    }
    .footer-brand { font-size: 1.4rem; font-weight: 800; color: #fff; margin-bottom: 14px; display: inline-block; }
    .footer-desc { line-height: 1.7; margin-bottom: 20px; }
    .footer-col-title { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 18px; }
    .footer-links { list-style: none; margin: 0; padding: 0; }
    .footer-links li { margin-bottom: 10px; }
    .footer-links a { color: #94a3b8; }
    .footer-links a:hover { color: #fff; }
    .footer-bottom {
      margin-top: 50px;
      padding-top: 24px;
      border-top: 1px solid rgba(255,255,255,0.06);
      text-align: center;
      font-size: 0.82rem;
    }

    @media (max-width: 1024px) {
      .kpi-card { flex: 1 1 calc(50% - 12px); }
      .matrix-item { flex: 1 1 calc(50% - 12px); }
      .news-card { flex: 1 1 calc(50% - 12px); }
      .shield-box { flex: 1 1 calc(50% - 10px); }
    }
    @media (max-width: 768px) {
      .hero-h1 { font-size: 2.1rem; }
      .header-inner { height: auto; padding: 14px 0; flex-direction: column; gap: 12px; }
      .nav-actions { width: 100%; justify-content: space-between; }
      .kpi-card, .matrix-item, .news-card, .shield-box { flex: 1 1 100%; }
      .timeline::before { left: 16px; }
      .timeline-item { padding-left: 46px; }
      .timeline-dot { left: 8px; }
      .form-wrap { padding: 24px; }
    }