/* roulang page: index */
:root {
      --primary: #6366F1;
      --primary-dark: #4F46E5;
      --accent: #10B981;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --card-border: rgba(226, 232, 240, 0.8);
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .brand-gradient {
      background: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
    }
    .card-hover-shadow {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 20px -2px rgba(99, 102, 241, 0.05);
    }
    .card-hover-shadow:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(99, 102, 241, 0.12), 0 8px 10px -6px rgba(99, 102, 241, 0.08);
    }
    .hero-bg {
      background: linear-gradient(rgba(15, 23, 42, 0.85), rgba(15, 23, 42, 0.92)), url('/assets/images/becf5414a7d9c735.jpg') center/cover no-repeat;
    }
    .dark-section-bg {
      background: linear-gradient(rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98)), url('/assets/images/d3f4f0c1fd6bd93e.jpg') center/cover no-repeat;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    .badge-glow {
      box-shadow: 0 0 15px rgba(99, 102, 241, 0.3);
    }