/* roulang page: index */
:root {
      --primary-color: #1E56A0;
      --primary-hover: #174482;
      --secondary-color: #0F2537;
      --accent-color: #00B4D8;
      --bg-base: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-subtle: #E2E8F0;
      --radius-lg: 16px;
      --shadow-card: 0 4px 20px -2px rgba(30, 86, 160, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
      --shadow-hover: 0 16px 32px -4px rgba(30, 86, 160, 0.16), 0 6px 12px -2px rgba(15, 37, 55, 0.08);
    }

    body {
      font-family: 'Noto Sans SC', sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      scroll-behavior: smooth;
    }

    .ui-card-shadow {
      box-shadow: var(--shadow-card);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .ui-card-shadow:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .glass-nav {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .hero-mask {
      background: linear-gradient(135deg, rgba(15, 37, 55, 0.88) 0%, rgba(30, 86, 160, 0.78) 100%);
    }

    /* 滚动条美化 */
    ::-webkit-scrollbar {
      width: 8px;
    }
    ::-webkit-scrollbar-track {
      background: #F1F5F9;
    }
    ::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
      background: #94A3B8;
    }