/* roulang page: index */
:root {
      --primary: #4F46E5;
      --primary-hover: #4338CA;
      --accent-mint: #10B981;
      --bg-light: #F8FAFC;
      --bg-dark: #090D16;
      --card-border-light: rgba(226, 232, 240, 0.8);
      --card-border-dark: rgba(30, 41, 59, 0.8);
      --text-main: #0F172A;
      --text-muted: #64748B;
      --radius-box: 1rem;
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    body {
      font-family: Inter, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      color: var(--text-main);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    .glass-nav {
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }

    .glow-violet {
      box-shadow: 0 10px 40px -10px rgba(79, 70, 229, 0.35);
    }

    .glow-mint {
      box-shadow: 0 10px 30px -10px rgba(16, 185, 129, 0.35);
    }

    .text-gradient {
      background: linear-gradient(135deg, #4F46E5 0%, #10B981 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .card-modern {
      background: #ffffff;
      border: 1px solid rgba(226, 232, 240, 0.9);
      border-radius: var(--radius-box);
      transition: var(--transition-smooth);
    }

    .card-modern:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 35px -10px rgba(15, 23, 42, 0.08);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .coupon-edge {
      position: relative;
      background: radial-gradient(circle at left, transparent 8px, #ffffff 8.5px) left,
                  radial-gradient(circle at right, transparent 8px, #ffffff 8.5px) right;
      background-size: 51% 100%;
      background-repeat: no-repeat;
    }