/* roulang page: index */
:root {
      --primary: #D32F2F;
      --primary-dark: #B71C1C;
      --secondary: #0F172A;
      --accent: #F59E0B;
      --slate-bg: #F8FAFC;
      --border-color: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      line-height: 1.75;
      background-color: #0B1120;
      color: #334155;
    }
    .header-top {
      background-color: #090D1A;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .hero-cinematic {
      background: radial-gradient(circle at center, rgba(15, 23, 42, 0.4) 0%, rgba(11, 17, 32, 0.98) 100%),
                  url('/assets/images/90713d1e0c31ad2b.webp') center center / cover no-repeat;
    }
    .btn-fire {
      background-color: var(--primary);
      transition: all 0.25s ease-in-out;
    }
    .btn-fire:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 4px 14px rgba(211, 47, 47, 0.35);
    }
    .card-hover {
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.15);
    }
    .dark-card-hover {
      transition: transform 0.25s ease, border-color 0.25s ease;
    }
    .dark-card-hover:hover {
      transform: translateY(-4px);
      border-color: rgba(211, 47, 47, 0.5);
    }
    .tab-active {
      border-left: 3px solid var(--primary);
      background-color: #FEF2F2;
      color: var(--primary-dark);
    }