/* roulang page: index */
:root {
      --primary: #EA580C;
      --primary-hover: #C2410C;
      --navy: #0F172A;
      --navy-card: #1E293B;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --radius-base: 16px;
      --shadow-soft: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
    }
    
    html {
      scroll-behavior: smooth;
    }
    
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      line-height: 1.8;
      color: var(--text-main);
      background-color: #ffffff;
      -webkit-font-smoothing: antialiased;
    }

    .container-custom {
      max-width: 1280px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 1.5rem;
      padding-right: 1.5rem;
    }

    .section-padding {
      padding-top: 5.5rem;
      padding-bottom: 5.5rem;
    }

    .card-hover-effect {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover-effect:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 35px -12px rgba(15, 23, 42, 0.12);
    }

    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 23, 42, 0.85) 60%, rgba(234, 88, 12, 0.75) 100%);
    }

    .mesh-gradient-dark {
      background: radial-gradient(circle at 85% 15%, rgba(234, 88, 12, 0.15) 0%, transparent 40%),
                  radial-gradient(circle at 15% 85%, rgba(16, 185, 129, 0.08) 0%, transparent 40%),
                  #0B0F19;
    }

    /* 保证触控热区与无障碍交互 */
    a, button, input, select {
      min-height: 44px;
      display: inline-flex;
      align-items: center;
    }