/* roulang page: index */
:root {
      --primary: #1e40af;
      --primary-hover: #1d4ed8;
      --accent: #2563eb;
      --success: #059669;
      --warning: #d97706;
      --slate-dark: #0f172a;
      --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --card-hover-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.1);
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", PingFang SC, Hiragino Sans GB, "Microsoft YaHei", sans-serif;
    }
    body {
      color: #1e293b;
      background-color: #ffffff;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .custom-card-shadow {
      box-shadow: var(--card-shadow);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-card-shadow:hover {
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
    }
    .countdown-circle {
      stroke-dasharray: 283;
      stroke-dashoffset: 60;
      transition: stroke-dashoffset 1s linear;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.82) 100%);
    }