/* roulang page: index */
:root {
      --primary: #0A2540;
      --secondary: #0F172A;
      --accent: #10B981;
      --accent-hover: #059669;
      --highlight: #F97316;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --border-color: #E2E8F0;
      --text-main: #334155;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .hero-bg {
      background-image: linear-gradient(180deg, rgba(10, 37, 64, 0.88) 0%, rgba(15, 23, 42, 0.96) 100%), url('/assets/images/b7046d67b37cc491.jpg');
      background-size: cover;
      background-position: center;
    }
    .dark-engine-bg {
      background-image: linear-gradient(180deg, rgba(11, 15, 25, 0.95) 0%, rgba(10, 37, 64, 0.98) 100%), url('/assets/images/1a2823eec12db384.jpg');
      background-size: cover;
      background-position: center;
    }
    .tech-grid-pattern {
      background-size: 30px 30px;
      background-image: linear-gradient(to right, rgba(226, 232, 240, 0.3) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(226, 232, 240, 0.3) 1px, transparent 1px);
    }
    .card-hover-effect {
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -4px rgba(10, 37, 64, 0.08);
    }
    .coupon-ticket {
      position: relative;
      background: radial-gradient(circle at left, transparent 10px, white 11px) left,
                  radial-gradient(circle at right, transparent 10px, white 11px) right;
      background-size: 51% 100%;
      background-repeat: no-repeat;
    }