/* roulang page: index */
:root {
      --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      font-family: var(--font-stack);
      color: #334155;
      background-color: #FFFFFF;
      overflow-x: hidden;
      line-height: 1.65;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(11, 17, 29, 0.94) 0%, rgba(15, 23, 42, 0.90) 100%), url('/assets/images/daa33f15b6f6de70.webp') center/cover no-repeat;
    }
    .dark-pattern-bg {
      background: radial-gradient(circle at 50% 50%, #1e293b 0%, #0b111d 100%);
    }
    .glass-nav {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      background-color: rgba(255, 255, 255, 0.92);
    }
    .tab-active {
      border-color: #0084FF;
      color: #0084FF;
      font-weight: 600;
    }
    .btn-gradient {
      background: linear-gradient(90deg, #00D2A0 0%, #0084FF 100%);
      transition: all 0.3s ease;
    }
    .btn-gradient:hover {
      box-shadow: 0 8px 24px -4px rgba(0, 132, 255, 0.45);
      transform: translateY(-2px);
    }