/* roulang page: index */
:root {
      --primary: #10b981;
      --primary-hover: #059669;
      --secondary: #0ea5e9;
      --accent: #f59e0b;
      --dark-bg: #0b132b;
      --dark-card: #1c2541;
      --text-main: #0f172a;
      --text-muted: #334155;
      --text-light: #64748b;
      --border-color: #e2e8f0;
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --shadow-card: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 20px 35px -5px rgba(16, 185, 129, 0.16);
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    .custom-card {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid var(--border-color);
    }
    .custom-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-card);
      border-color: #cbd5e1;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px 0 rgba(16, 185, 129, 0.35);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 6px 20px 0 rgba(16, 185, 129, 0.45);
      transform: translateY(-1px);
    }
    .btn-outline {
      border: 1px solid #cbd5e1;
      color: var(--text-muted);
      background-color: #ffffff;
      transition: all 0.2s ease;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: #f0fdf4;
    }
    .accordion-content {
      transition: max-height 0.35s ease, opacity 0.3s ease;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
    }
    .accordion-content.active {
      max-height: 500px;
      opacity: 1;
    }
    .rotate-icon {
      transition: transform 0.3s ease;
    }
    .rotate-icon.active {
      transform: rotate(180deg);
    }
    .scenario-col {
      transition: all 0.4s ease;
    }
    @media (min-width: 1024px) {
      .scenario-col:hover {
        flex: 1.8;
      }
    }