/* roulang page: index */
:root {
      --color-primary: #0F242A;
      --color-secondary: #16333C;
      --color-accent: #00A878;
      --color-amber: #E67E22;
      --color-bg-base: #F7F9F9;
      --font-stack: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }
    body {
      font-family: var(--font-stack);
      background-color: var(--color-bg-base);
      color: #1A252C;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    section {
      scroll-margin-top: 88px;
    }
    .custom-shadow {
      box-shadow: 0 1px 3px rgba(15,36,42,0.06), 0 8px 24px -4px rgba(15,36,42,0.08);
    }
    .custom-shadow-hover {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .custom-shadow-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 32px -4px rgba(15,36,42,0.14);
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(15, 36, 42, 0.94) 0%, rgba(22, 51, 60, 0.88) 100%), url('/assets/images/49ec1583ec81e2cb.webp') center/cover no-repeat;
    }