/* roulang page: index */
:root {
      --primary-navy: #0F387A;
      --primary-dark: #0A192F;
      --accent-orange: #F97316;
      --accent-gold: #D97706;
      --bg-light: #F8FAFC;
      --border-color: #E2E8F0;
      --text-main: #1E293B;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.7;
    }
    .hero-gold-gradient {
      background: radial-gradient(circle at top right, rgba(217, 119, 6, 0.15), transparent 50%),
                  radial-gradient(circle at bottom left, rgba(15, 56, 122, 0.3), transparent 50%),
                  linear-gradient(135deg, #0b1120 0%, #020617 100%);
    }
    .coupon-card {
      background: radial-gradient(circle at left, transparent 10px, #ffffff 11px) left,
                  radial-gradient(circle at right, transparent 10px, #ffffff 11px) right;
      background-size: 51% 100%;
      background-repeat: no-repeat;
    }
    .coupon-border {
      border-left: 2px dashed #cbd5e1;
    }
    .badge-glow {
      box-shadow: 0 0 15px rgba(249, 115, 22, 0.4);
    }