/* roulang page: index */
:root {
      --primary-color: #FF5E1E;
      --primary-light: #FF8A00;
      --dark-navy: #0F172A;
      --deep-bg: #0B0F19;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-box: 1.25rem;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: #F8FAFC;
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-gradient-btn {
      background: linear-gradient(135deg, #FF5E1E 0%, #FF8A00 100%);
      transition: all 0.3s ease;
    }
    .custom-gradient-btn:hover {
      box-shadow: 0 10px 25px -5px rgba(255, 94, 30, 0.45);
      transform: translateY(-2px);
    }
    .card-shadow {
      box-shadow: 0 12px 32px -6px rgba(15, 23, 42, 0.06), 0 0 0 1px rgba(226, 232, 240, 0.85);
      transition: transform 0.3s ease, box-shadow 0.3s ease;
    }
    .card-shadow:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 35px -8px rgba(15, 23, 42, 0.12), 0 0 0 1px rgba(255, 94, 30, 0.3);
    }
    .glow-radar {
      background: radial-gradient(ellipse at center, rgba(6, 182, 212, 0.18), transparent 70%);
    }
    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10B981;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse-ring 2s infinite;
    }
    @keyframes pulse-ring {
      0% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      }
      70% {
        transform: scale(1);
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
      }
      100% {
        transform: scale(0.95);
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
      }
    }
    .code-grid {
      background-size: 24px 24px;
      background-image: linear-gradient(to right, rgba(255, 255, 255, 0.05) 1px, transparent 1px),
                        linear-gradient(to bottom, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    }