/* roulang page: index */
:root {
      --primary: #0A2E4D;
      --accent: #00B4D8;
      --highlight: #F49C14;
      --bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-dark: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border: #E2E8F0;
      --radius-card: 16px;
      --radius-btn: 12px;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg);
      color: var(--text-body);
      line-height: 1.75;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    button, input, textarea {
      font-family: inherit;
    }
    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }
    @media (min-width: 1024px) {
      .container-custom {
        padding-left: 2rem;
        padding-right: 2rem;
      }
    }
    .bg-hero-gradient {
      background: linear-gradient(135deg, #0A2E4D 0%, #0D3B5C 40%, #094A6B 100%);
    }
    .card-hover {
      transition: all 0.25s ease;
    }
    .card-hover:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 25px -5px rgba(0,0,0,0.08), 0 8px 10px -6px rgba(0,0,0,0.04);
    }
    .text-glow {
      text-shadow: 0 0 8px rgba(0,180,216,0.6);
    }
    .btn-primary {
      background-color: var(--highlight);
      color: white;
      font-weight: 600;
      letter-spacing: 0.02em;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: all 0.2s;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: #E0850A;
      box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
      transform: scale(1.02);
    }
    .btn-outline {
      background: transparent;
      border: 2px solid var(--accent);
      color: var(--accent);
      font-weight: 600;
      letter-spacing: 0.02em;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      transition: all 0.2s;
      display: inline-flex;
      align-items: center;
    }
    .btn-outline:hover {
      background-color: rgba(0,180,216,0.08);
      border-color: #0099b8;
      color: #0099b8;
    }
    .nav-link {
      color: #334155;
      font-weight: 500;
      transition: color 0.2s;
    }
    .nav-link:hover {
      color: var(--accent);
    }
    .footer-link {
      color: #9CA3AF;
      transition: color 0.2s;
    }
    .footer-link:hover {
      color: white;
    }
    .input-field {
      border: 1px solid #E2E8F0;
      border-radius: 12px;
      padding: 12px 16px;
      width: 100%;
      transition: border 0.2s, box-shadow 0.2s;
      background: white;
    }
    .input-field:focus {
      outline: none;
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(0,180,216,0.2);
    }
    .badge {
      background: rgba(0,180,216,0.1);
      color: var(--accent);
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 999px;
      font-size: 0.8rem;
    }