/* roulang page: index */
:root {
      --primary: #0F1E36;
      --accent: #0284C7;
      --accent-hover: #0EA5E9;
      --secondary: #D97706;
      --bg-base: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --radius-box: 10px;
      --shadow-subtle: 0 4px 20px -2px rgba(15, 30, 54, 0.05);
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.75;
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(11, 19, 43, 0.94) 0%, rgba(15, 30, 54, 0.92) 100%), url('/assets/images/8885f97253276bc9.jpg') center/cover no-repeat;
    }
    .dark-section-bg {
      background: linear-gradient(180deg, #0B132B 0%, #080E1A 100%), url('/assets/images/167de6ce45c505ac.webp') center/cover no-repeat;
      background-blend-mode: overlay;
    }
    .custom-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-box);
      box-shadow: var(--shadow-subtle);
      transition: all 0.25s ease-in-out;
    }
    .custom-card:hover {
      transform: translateY(-3px);
      border-color: #38BDF8;
      box-shadow: 0 12px 28px -4px rgba(14, 165, 233, 0.12);
    }
    .badge-amber {
      background-color: #FEF3C7;
      color: #92400E;
      border: 1px solid #FDE68A;
    }
    .badge-blue {
      background-color: #E0F2FE;
      color: #0369A1;
      border: 1px solid #BAE6FD;
    }
    .btn-primary {
      background: linear-gradient(135deg, #0284C7 0%, #0EA5E9 100%);
      color: #FFFFFF;
      transition: all 0.2s ease;
      min-height: 44px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, #0369A1 0%, #0284C7 100%);
      box-shadow: 0 4px 14px rgba(2, 132, 199, 0.35);
    }
    details summary::-webkit-details-marker {
      display: none;
    }