/* roulang page: index */
:root {
      --color-orange: #FF5A1F;
      --color-teal: #00D084;
      --color-dark: #0B1315;
      --color-surface: #141E21;
      --color-light: #F8FAFB;
      --color-border: #E5E9EB;
      --color-text: #1F2A2E;
      --color-muted: #637381;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: var(--color-light);
      color: var(--color-text);
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', Inter, system-ui, sans-serif;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 2px 10px rgba(11, 19, 21, 0.05);
    }
    .card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 14px 28px rgba(11, 19, 21, 0.09);
    }
    .code-console {
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }
    .nav-blur {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
    }
    /* 手风琴过渡样式 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-item.active .faq-answer {
      max-height: 200px;
    }
    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }