/* roulang page: index */
:root {
      --primary: #0F5B47;
      --accent: #E8823A;
      --bg: #F7F9F6;
      --surface-dark: #13241E;
      --text-main: #1A2E26;
      --text-muted: #4A5D54;
      --border: #DDE4E0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .hero-bg {
      background-image: linear-gradient(rgba(15, 91, 71, 0.88), rgba(19, 36, 30, 0.94)), url('/assets/images/b4bb6a10c14f7f37.jpg');
      background-size: cover;
      background-position: center;
    }
    .solution-bg {
      background-image: linear-gradient(rgba(19, 36, 30, 0.96), rgba(19, 36, 30, 0.98)), url('/assets/images/16ed37d0fa867d25.png');
      background-size: cover;
      background-position: center;
    }
    .smooth-scroll {
      scroll-behavior: smooth;
    }
    .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(15, 91, 71, 0.15);
    }