/* roulang page: index */
:root {
      --primary: #1B5E20;
      --primary-dark: #143A18;
      --accent: #F57C00;
      --accent-hover: #E65100;
      --bg-warm: #FAFAF6;
      --white: #FFFFFF;
      --text: #2C2C2C;
      --text-light: #5C5C5C;
      --border-light: #E0E0D8;
      --shadow-sm: 0 4px 20px rgba(0,0,0,0.04);
      --shadow-md: 0 12px 32px rgba(0,0,0,0.08);
      --radius-card: 16px;
      --radius-btn: 40px;
      --radius-tag: 20px;
      --transition: 0.25s ease;
      --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --max-width: 1200px;
    }
    
    * {
      box-sizing: border-box;
    }
    
    body {
      font-family: var(--font-stack);
      background-color: var(--bg-warm);
      color: var(--text);
      margin: 0;
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }
    
    h1, h2, h3, h4 {
      font-weight: 700;
      letter-spacing: -0.5px;
      color: var(--text);
    }
    
    h1 { font-size: 36px; }
    h2 { font-size: 28px; }
    h3 { font-size: 22px; font-weight: 600; }
    
    .container {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 16px;
    }
    
    /* 导航样式 */
    .site-header {
      background: var(--white);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      position: sticky;
      top: 0;
      z-index: 100;
      padding: 12px 0;
    }
    
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: center;
      position: relative;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 16px;
    }
    
    .logo-center {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
      text-decoration: none;
      letter-spacing: 1px;
      display: flex;
      align-items: center;
      gap: 6px;
      margin: 0 24px;
      white-space: nowrap;
    }
    
    .logo-center i {
      font-size: 24px;
      color: var(--accent);
    }
    
    .nav-menu {
      display: flex;
      list-style: none;
      margin: 0;
      padding: 0;
      gap: 8px;
      flex-wrap: wrap;
      justify-content: center;
    }
    
    .nav-menu a {
      display: block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--text);
      text-decoration: none;
      border-radius: 24px;
      transition: var(--transition);
      white-space: nowrap;
    }
    
    .nav-menu a:hover {
      color: var(--primary);
      background: rgba(27,94,32,0.06);
    }
    
    .nav-menu a.active {
      color: var(--primary);
      border-bottom: 2px solid var(--primary);
      background: transparent;
      border-radius: 0;
    }
    
    .mobile-toggle {
      display: none;
      font-size: 24px;
      background: none;
      border: none;
      color: var(--text);
      position: absolute;
      right: 16px;
      top: 50%;
      transform: translateY(-50%);
      cursor: pointer;
    }
    
    /* 区块间距 */
    section {
      padding: 80px 0;
    }
    
    @media (max-width: 1024px) {
      section { padding: 64px 0; }
      h1 { font-size: 30px; }
      h2 { font-size: 24px; }
    }
    
    @media (max-width: 640px) {
      .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        background: white;
        position: absolute;
        top: 100%;
        left: 0;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        padding: 16px 0;
        border-radius: 0 0 16px 16px;
      }
      .nav-menu.open {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .nav-container {
        justify-content: flex-start;
      }
      .logo-center {
        margin: 0 auto 0 0;
        font-size: 22px;
      }
      section { padding: 48px 0; }
      h1 { font-size: 28px; }
      h2 { font-size: 22px; }
    }
    
    /* 按钮系统 */
    .btn {
      display: inline-block;
      padding: 12px 28px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 2px solid transparent;
      font-size: 16px;
      text-align: center;
    }
    
    .btn-primary {
      background: var(--accent);
      color: white;
      border-color: var(--accent);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      border-color: var(--accent-hover);
      color: white;
    }
    
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background: rgba(27,94,32,0.08);
    }
    
    .btn-text {
      color: var(--primary);
      font-weight: 600;
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      border-bottom: 1px solid transparent;
    }
    .btn-text:hover {
      border-bottom-color: var(--primary);
    }
    
    /* 卡片 */
    .card {
      background: var(--white);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      height: 100%;
      overflow: hidden;
    }
    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    
    .badge {
      background: rgba(27,94,32,0.1);
      color: var(--primary);
      padding: 4px 12px;
      border-radius: var(--radius-tag);
      font-size: 13px;
      font-weight: 600;
      display: inline-block;
    }
    
    .data-badge {
      background: white;
      border-radius: 12px;
      padding: 8px 16px;
      box-shadow: 0 8px 20px rgba(0,0,0,0.06);
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .data-badge span {
      color: var(--accent);
      font-size: 20px;
      font-weight: 800;
    }
    
    /* Hero */
    .hero-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .hero-image {
      position: relative;
      border-radius: 32px;
      overflow: hidden;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      min-height: 360px;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(27,94,32,0.25) 0%, transparent 60%);
    }
    
    @media (max-width: 640px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .hero-image {
        order: -1;
        min-height: 260px;
      }
    }
    
    /* 服务交替 */
    .service-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 64px;
    }
    .service-row.reverse {
      direction: rtl;
    }
    .service-row.reverse > * {
      direction: ltr;
    }
    
    @media (max-width: 640px) {
      .service-row, .service-row.reverse {
        grid-template-columns: 1fr;
        direction: ltr;
      }
    }
    
    /* 案例瀑布 */
    .masonry-grid {
      column-count: 3;
      column-gap: 24px;
    }
    .masonry-item {
      break-inside: avoid;
      margin-bottom: 24px;
    }
    @media (max-width: 768px) {
      .masonry-grid { column-count: 2; }
    }
    @media (max-width: 520px) {
      .masonry-grid { column-count: 1; }
    }
    
    /* 对比表 */
    .compare-table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }
    .compare-table {
      width: 100%;
      min-width: 600px;
      border-collapse: collapse;
      background: white;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: center;
      border-bottom: 1px solid var(--border-light);
    }
    .compare-table th {
      background: #f4f7f2;
      font-weight: 700;
    }
    .highlight-col {
      background: rgba(27,94,32,0.04);
      position: relative;
    }
    .popular-badge {
      background: var(--accent);
      color: white;
      font-size: 12px;
      padding: 2px 10px;
      border-radius: 12px;
      position: absolute;
      top: -8px;
      right: 10px;
    }
    
    /* FAQ 手风琴 */
    .accordion-item {
      border: 1px solid var(--border-light);
      border-radius: 12px;
      margin-bottom: 12px;
      background: white;
      transition: var(--transition);
    }
    .accordion-header {
      padding: 18px 24px;
      font-weight: 600;
      font-size: 18px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text);
    }
    .accordion-header i {
      transition: transform 0.3s;
    }
    .accordion-content {
      padding: 0 24px 18px;
      display: none;
      color: var(--text-light);
    }
    .accordion-item.active {
      border-color: var(--primary);
    }
    .accordion-item.active .accordion-header i {
      transform: rotate(180deg);
    }
    .accordion-item.active .accordion-content {
      display: block;
    }
    
    /* CTA 横幅 */
    .cta-banner {
      background: linear-gradient(105deg, #1B5E20 0%, #2E7D32 100%);
      border-radius: 32px;
      padding: 64px 32px;
      text-align: center;
      color: white;
    }
    
    /* 页脚 */
    .site-footer {
      background: var(--primary-dark);
      color: rgba(255,255,255,0.85);
      padding: 64px 0 24px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
    }
    .social-icons a {
      color: white;
      margin-right: 16px;
      font-size: 20px;
      border: 1px solid rgba(255,255,255,0.4);
      border-radius: 50%;
      width: 40px;
      height: 40px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }
    .social-icons a:hover {
      background: var(--accent);
      border-color: var(--accent);
    }
    @media (max-width: 768px) {
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 520px) {
      .footer-grid { grid-template-columns: 1fr; }
    }