/* roulang page: index */
@import url('/assets/css/vendor/1ecd1de215-css2.css');
    
    :root {
      --bamboo-white: #FBF7F0;
      --ink-black: #1E1E1E;
      --score-red: #D43D3D;
      --score-red-hover: #B53030;
      --bamboo-green: #6B8E4E;
      --bamboo-green-soft: #E9F0E1;
      --card-shadow: 0 2px 8px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
      --card-shadow-hover: 0 8px 20px rgba(0,0,0,0.08);
      --border-light: #E8E2D7;
      --text-secondary: #5A5A5A;
      --radius-card: 12px;
      --radius-btn: 8px;
      --radius-icon: 8px;
    }

    * {
      box-sizing: border-box;
    }

    body {
      margin: 0;
      font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
      background-color: var(--bamboo-white);
      color: var(--ink-black);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    /* 中文标题使用系统无衬线粗体 */
    h1, h2, h3, .font-sans-cn {
      font-family: "思源黑体", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
      font-weight: 700;
      letter-spacing: -0.02em;
    }

    .container-main {
      margin-left: 220px;
      width: calc(100% - 220px);
      transition: margin-left 0.3s ease;
    }

    /* 左侧竖向导航 */
    .side-nav {
      position: fixed;
      left: 0;
      top: 0;
      bottom: 0;
      width: 220px;
      background-color: #FFFFFF;
      border-right: 1px solid var(--border-light);
      display: flex;
      flex-direction: column;
      z-index: 40;
      box-shadow: 2px 0 8px rgba(0,0,0,0.02);
    }

    .nav-brand {
      padding: 2rem 1.5rem 1.5rem;
      display: flex;
      align-items: center;
      gap: 0.75rem;
      border-bottom: 1px solid var(--border-light);
    }

    .brand-icon {
      width: 40px;
      height: 40px;
      background-color: var(--ink-black);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-size: 1.5rem;
      position: relative;
      overflow: hidden;
    }
    .brand-icon::after {
      content: "🐼";
      font-size: 1.8rem;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
    }

    .brand-text {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--ink-black);
      letter-spacing: 0.5px;
    }

    .nav-links {
      flex: 1;
      padding: 2rem 0 1rem;
      display: flex;
      flex-direction: column;
      gap: 0.25rem;
    }

    .nav-link {
      display: flex;
      align-items: center;
      padding: 0.8rem 1.5rem;
      color: var(--text-secondary);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      transition: all 0.2s;
      border-left: 3px solid transparent;
      position: relative;
    }

    .nav-link:hover {
      color: var(--ink-black);
      background-color: #F9F6F0;
    }

    .nav-link.active {
      color: var(--ink-black);
      background-color: #FBF7F0;
      border-left-color: var(--score-red);
      font-weight: 600;
    }

    .mobile-header {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      background: white;
      border-bottom: 1px solid var(--border-light);
      z-index: 50;
      padding: 0.9rem 1.2rem;
      align-items: center;
      justify-content: space-between;
    }

    .hamburger {
      font-size: 1.6rem;
      background: none;
      border: none;
      color: var(--ink-black);
      cursor: pointer;
    }

    .mobile-menu {
      display: none;
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: var(--bamboo-white);
      z-index: 45;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 2rem;
    }

    .mobile-menu a {
      font-size: 1.5rem;
      color: var(--ink-black);
      text-decoration: none;
      font-weight: 600;
      border-bottom: 2px solid transparent;
    }
    .mobile-menu a:hover {
      border-bottom-color: var(--score-red);
    }

    /* 卡片与组件 */
    .card {
      background: #FFFFFF;
      border-radius: var(--radius-card);
      box-shadow: var(--card-shadow);
      transition: box-shadow 0.2s ease, transform 0.2s ease;
    }
    .card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-2px);
    }

    .btn-primary {
      background-color: var(--score-red);
      color: white;
      border: none;
      padding: 0.75rem 2rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: background-color 0.2s;
      display: inline-block;
      text-decoration: none;
      box-shadow: 0 2px 6px rgba(212,61,61,0.15);
    }
    .btn-primary:hover {
      background-color: var(--score-red-hover);
    }

    .btn-secondary {
      background: transparent;
      color: var(--ink-black);
      border: 1.5px solid var(--ink-black);
      padding: 0.7rem 1.8rem;
      border-radius: var(--radius-btn);
      font-weight: 600;
      transition: all 0.2s;
      text-decoration: none;
    }
    .btn-secondary:hover {
      background: #1E1E1E0D;
    }

    .tag-green {
      background-color: var(--bamboo-green-soft);
      color: var(--bamboo-green);
      padding: 0.2rem 0.8rem;
      border-radius: 20px;
      font-size: 0.8rem;
      font-weight: 600;
    }

    .highlight-number {
      font-variant-numeric: tabular-nums;
      font-weight: 700;
      color: var(--score-red);
    }

    /* FAQ 手风琴 */
    .faq-item {
      border-bottom: 1px solid var(--border-light);
    }
    .faq-question {
      cursor: pointer;
      padding: 1.2rem 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      color: var(--text-secondary);
    }

    @media (max-width: 1024px) {
      .container-main {
        margin-left: 0;
        width: 100%;
      }
      .side-nav {
        display: none;
      }
      .mobile-header {
        display: flex;
      }
      .mobile-menu.show {
        display: flex;
      }
    }

    @media (max-width: 768px) {
      .grid-responsive {
        grid-template-columns: 1fr !important;
      }
      .hero-container {
        flex-direction: column;
      }
      .compare-scroll {
        overflow-x: auto;
      }
    }