/* roulang page: index */
:root {
      --primary: #1B8C3C;
      --primary-deep: #0E4D2B;
      --accent: #F36F21;
      --bg: #F7F6F2;
      --card-bg: #FFFFFF;
      --card-alt: #F0F5F1;
      --text: #1A1A1A;
      --text-secondary: #4A4A4A;
      --text-muted: #8C8C8C;
      --border: #E0E0D8;
      --radius: 12px;
      --shadow-sm: 0 2px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 8px 24px rgba(0,0,0,0.08);
      --transition: all 0.2s ease;
    }
    * {
      box-sizing: border-box;
    }
    body {
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, -apple-system, sans-serif;
      background-color: var(--bg);
      color: var(--text);
      line-height: 1.75;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    h1, h2, h3, h4 {
      margin: 0;
    }
    h1 {
      font-size: 32px;
      line-height: 1.3;
      font-weight: 700;
      letter-spacing: -0.5px;
    }
    h2 {
      font-size: 26px;
      line-height: 1.4;
      font-weight: 600;
    }
    h3 {
      font-size: 20px;
      line-height: 1.4;
      font-weight: 500;
    }
    p {
      color: var(--text-secondary);
      max-width: 72ch;
    }
    .text-muted {
      color: var(--text-muted);
    }
    .section-spacing {
      margin-top: 80px;
      margin-bottom: 80px;
    }
    .btn-primary {
      background-color: var(--primary);
      color: white;
      border-radius: 8px;
      padding: 10px 24px;
      font-weight: 500;
      transition: var(--transition);
      display: inline-block;
      text-decoration: none;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      background-color: var(--primary-deep);
    }
    .btn-outline {
      background: transparent;
      border: 1px solid var(--primary);
      color: var(--primary);
      border-radius: 8px;
      padding: 10px 24px;
      font-weight: 500;
      transition: var(--transition);
      display: inline-block;
      text-decoration: none;
    }
    .btn-outline:hover {
      background-color: rgba(27,140,60,0.05);
    }
    .btn-accent {
      background-color: var(--accent);
      color: white;
      border-radius: 10px;
      padding: 14px 32px;
      font-weight: 600;
      transition: var(--transition);
      display: inline-block;
      text-decoration: none;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 10px rgba(243,111,33,0.3);
    }
    .btn-accent:hover {
      background-color: #e05f10;
    }
    .card {
      background: var(--card-bg);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      padding: 24px;
      transition: var(--transition);
      border: 1px solid var(--border);
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    /* 导航栏 */
    .navbar {
      background: white;
      height: 64px;
      display: flex;
      align-items: center;
      position: sticky;
      top: 0;
      z-index: 50;
      box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    }
    .nav-link {
      color: var(--text-secondary);
      font-size: 15px;
      text-decoration: none;
      padding: 8px 12px;
      transition: var(--transition);
      border-bottom: 2px solid transparent;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }
    .status-badge {
      background: #e8f5e9;
      color: var(--primary);
      border-radius: 20px;
      padding: 2px 10px;
      font-size: 12px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .status-dot {
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      display: inline-block;
      animation: pulse 1.5s infinite;
    }
    @keyframes pulse { 0% { opacity: 1; } 50% { opacity: 0.5; } 100% { opacity: 1; } }
    /* Hero */
    .hero-bg {
      background: linear-gradient(135deg, rgba(14,77,43,0.7) 0%, rgba(27,140,60,0.6) 100%), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
    }
    .data-ghost {
      font-size: 64px;
      font-weight: 800;
      opacity: 0.15;
      color: white;
      position: absolute;
      right: 10%;
      top: 20%;
      transform: rotate(5deg);
      user-select: none;
    }
    /* 对比区域 */
    .comparison-left {
      background: #f0f2f0;
      border-radius: 12px 0 0 12px;
    }
    .comparison-right {
      background: #e8f5e9;
      border-radius: 0 12px 12px 0;
    }
    .vs-badge {
      width: 48px;
      height: 48px;
      background: white;
      color: var(--accent);
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      z-index: 5;
    }
    /* FAQ */
    .faq-item {
      border-bottom: 1px solid var(--border);
      padding: 16px 0;
    }
    .faq-question {
      font-weight: 600;
      font-size: 18px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-answer {
      color: var(--text-secondary);
      padding-top: 8px;
      display: none;
    }
    .faq-item.open .faq-answer {
      display: block;
      border-left: 3px solid var(--primary);
      padding-left: 16px;
      margin-top: 8px;
    }
    /* 表单 */
    .input-field {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border);
      border-radius: 8px;
      font-size: 16px;
      transition: var(--transition);
      background: white;
    }
    .input-field:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(27,140,60,0.1);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .container { padding-left: 16px; padding-right: 16px; }
      h1 { font-size: 28px; }
      h2 { font-size: 24px; }
    }
    @media (max-width: 768px) {
      .section-spacing { margin-top: 48px; margin-bottom: 48px; }
      .comparison-left, .comparison-right { border-radius: 12px; }
      .vs-badge { position: static; transform: none; margin: 16px auto; }
      .navbar .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
    }
    @media (min-width: 769px) {
      .mobile-menu-btn { display: none; }
    }