/* roulang page: index */
:root {
      --primary: #0A58CA;
      --primary-dark: #0B192C;
      --accent: #FF5500;
      --accent-green: #00D084;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --bg-light: #F8FAFC;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(11, 25, 44, 0.94) 0%, rgba(10, 88, 202, 0.88) 100%), url('/assets/images/6ca9008298743ca9.jpg') center/cover no-repeat;
    }
    .dark-section-bg {
      background: linear-gradient(180deg, #030712 0%, #0B192C 100%);
    }
    .card-hover {
      transition: all 0.25s ease;
      border: 1px solid var(--border-color);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -10px rgba(0, 0, 0, 0.08);
      border-color: #93C5FD;
    }
    details summary::-webkit-details-marker {
      display:none;
    }