/* roulang page: index */
:root {
      --primary: #0F5132;
      --primary-dark: #0B3B24;
      --accent: #FF6B35;
      --surface-bg: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--surface-bg);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
    }
    .hero-pattern {
      background-image: linear-gradient(135deg, rgba(15, 81, 50, 0.96) 0%, rgba(9, 17, 30, 0.94) 100%), url('/assets/images/1c83d5b75cc667ea.webp');
      background-size: cover;
      background-position: center;
    }
    .card-hover {
      transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -8px rgba(0, 0, 0, 0.08);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }