/* roulang page: index */
:root {
      --bg-primary: #F4F6F9;
      --bg-dark: #0D1117;
      --color-accent: #00D2A0;
      --color-titan: #1E2638;
      --color-silver: #E2E8F0;
      --color-amber: #FF8C42;
      --text-main: #1F2937;
      --text-muted: #64748B;
    }
    body {
      font-family: system-ui, -apple-system, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .grid-pattern {
      background-size: 32px 32px;
      background-image: 
        linear-gradient(to right, rgba(226, 232, 240, 0.4) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(226, 232, 240, 0.4) 1px, transparent 1px);
    }
    .grid-pattern-dark {
      background-size: 32px 32px;
      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);
    }
    .card-hover {
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -6px rgba(13, 17, 23, 0.08), 0 8px 12px -4px rgba(13, 17, 23, 0.04);
    }
    .banner-slide {
      transition: opacity 0.5s ease-in-out, transform 0.5s ease-in-out;
    }