/* roulang page: index */
/* ===== CSS变量与全局重置 ===== */
    :root {
      --primary-deep: #0A5C4F;
      --primary-mid: #0D7B6B;
      --accent-gold: #C49A3C;
      --accent-gold-light: #D4A843;
      --bg-light: #F7F9F8;
      --card-white: #FFFFFF;
      --text-dark: #1A2B28;
      --text-secondary: #5A6D69;
      --text-on-dark: #FFFFFF;
      --highlight-bg: #E8F4F1;
      --shadow-sm: 0 2px 12px rgba(10,92,79,0.06);
      --shadow-md: 0 8px 24px rgba(10,92,79,0.12);
      --border-light: 1px solid rgba(10,92,79,0.08);
      --radius-lg: 16px;
      --radius-md: 12px;
      --radius-sm: 8px;
      --font-stack: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
      --transition-base: 0.2s ease;
      --section-gap-desktop: 100px;
      --section-gap-tablet: 70px;
      --section-gap-mobile: 50px;
    }
    
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    
    body {
      font-family: var(--font-stack);
      font-size: 16px;
      line-height: 1.7;
      color: var(--text-dark);
      background-color: var(--bg-light);
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    
    a {
      color: var(--primary-mid);
      text-decoration: none;
      transition: color var(--transition-base);
    }
    
    a:hover {
      color: var(--primary-deep);
      text-decoration: underline;
    }
    
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    
    button, .button {
      font-family: var(--font-stack);
      cursor: pointer;
      transition: all var(--transition-base);
      border: none;
      outline: none;
    }
    
    /* 容器定制 */
    .custom-container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    
    /* ===== 导航栏 ===== */
    .site-header {
      position: sticky;
      top: 0;
      left: 0;
      width: 100%;
      height: 70px;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      box-shadow: 0 1px 8px rgba(0,0,0,0.04);
      z-index: 1000;
      display: flex;
      align-items: center;
      border-bottom: 1px solid rgba(10,92,79,0.1);
    }
    
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
    }
    
    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    
    .logo-icon {
      width: 38px;
      height: 38px;
      background: linear-gradient(135deg, var(--primary-deep), var(--primary-mid));
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      font-weight: bold;
      font-size: 20px;
      box-shadow: 0 4px 10px rgba(10,92,79,0.2);
    }
    
    .logo-text {
      font-size: 22px;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: 0.5px;
      line-height: 1;
    }
    
    .logo-text span {
      color: var(--accent-gold);
    }
    
    .nav-links {
      display: flex;
      gap: 32px;
      align-items: center;
    }
    
    .nav-links a {
      font-weight: 500;
      color: var(--text-dark);
      font-size: 15px;
      position: relative;
      padding: 8px 0;
    }
    
    .nav-links a:hover {
      color: var(--primary-deep);
      text-decoration: none;
    }
    
    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent-gold);
      transition: width 0.25s ease;
    }
    
    .nav-links a:hover::after {
      width: 100%;
    }
    
    .header-actions {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    
    .search-decor {
      background: #F0F2F1;
      border-radius: 30px;
      padding: 8px 16px;
      display: flex;
      align-items: center;
      gap: 6px;
      color: var(--text-secondary);
      font-size: 14px;
      border: 1px solid transparent;
      transition: all 0.2s;
      cursor: default;
    }
    
    .search-decor i {
      color: var(--primary-mid);
      font-size: 14px;
    }
    
    .icon-btn {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: transparent;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-dark);
      font-size: 18px;
      transition: background 0.2s;
    }
    
    .icon-btn:hover {
      background: var(--highlight-bg);
    }
    
    .btn-primary {
      background: linear-gradient(135deg, var(--accent-gold), var(--accent-gold-light));
      color: white;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 30px;
      font-size: 14px;
      letter-spacing: 0.3px;
      box-shadow: 0 4px 12px rgba(196,154,60,0.3);
      display: inline-block;
    }
    
    .btn-primary:hover {
      background: linear-gradient(135deg, #b38a2e, #c49a3c);
      transform: scale(1.03);
      box-shadow: 0 6px 18px rgba(196,154,60,0.4);
      color: white;
      text-decoration: none;
    }
    
    .btn-outline {
      background: transparent;
      border: 2px solid var(--primary-mid);
      color: var(--primary-mid);
      font-weight: 600;
      padding: 10px 24px;
      border-radius: 30px;
      font-size: 14px;
    }
    
    .btn-outline:hover {
      background: var(--highlight-bg);
      border-color: var(--primary-deep);
      color: var(--primary-deep);
    }
    
    /* 移动端导航隐藏 */
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 28px;
      color: var(--primary-deep);
    }
    
    /* ===== 区块通用 ===== */
    section {
      padding: var(--section-gap-desktop) 0;
    }
    
    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 16px;
      line-height: 1.3;
    }
    
    .section-subtitle {
      font-size: 18px;
      color: var(--text-secondary);
      max-width: 700px;
      margin: 0 auto 48px;
    }
    
    /* Hero */
    #hero {
      min-height: 85vh;
      display: flex;
      align-items: center;
      background: linear-gradient(180deg, #F7F9F8 0%, #FFFFFF 100%);
      position: relative;
    }
    
    .hero-grid {
      display: flex;
      align-items: center;
      gap: 60px;
    }
    
    .hero-left {
      flex: 1 1 55%;
    }
    
    .hero-right {
      flex: 1 1 45%;
      background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
      border-radius: var(--radius-lg);
      min-height: 420px;
      box-shadow: var(--shadow-md);
    }
    
    .hero-title {
      font-size: 46px;
      font-weight: 700;
      line-height: 1.2;
      color: var(--primary-deep);
      margin-bottom: 20px;
    }
    
    .hero-desc {
      font-size: 18px;
      color: var(--text-secondary);
      margin-bottom: 32px;
      max-width: 500px;
    }
    
    .badge-group {
      display: flex;
      gap: 28px;
      margin-top: 36px;
      flex-wrap: wrap;
    }
    
    .stat-badge {
      background: var(--highlight-bg);
      border-radius: 50px;
      padding: 12px 20px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    
    .stat-number {
      font-size: 28px;
      font-weight: 700;
      color: var(--primary-deep);
    }
    
    .stat-label {
      font-size: 13px;
      color: var(--text-secondary);
    }
    
    /* 痛点卡片 */
    .pain-grid {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    
    .pain-card {
      flex: 1 1 250px;
      background: var(--card-white);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      border-left: 5px solid var(--accent-gold);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    
    .pain-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
    }
    
    .pain-icon {
      font-size: 32px;
      color: var(--accent-gold);
      margin-bottom: 16px;
    }
    
    /* 解决方案不对称布局 */
    .solution-asym {
      display: flex;
      gap: 24px;
      flex-wrap: wrap;
    }
    
    .sol-standard {
      flex: 1 1 280px;
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
    }
    
    .sol-wide {
      flex: 2 1 500px;
      background: white;
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      gap: 30px;
      align-items: center;
      box-shadow: var(--shadow-sm);
    }
    
    .sol-wide-img {
      width: 180px;
      height: 180px;
      background: url('/assets/images/coverpic/cover-2.webp') center/cover no-repeat;
      border-radius: 12px;
      flex-shrink: 0;
    }
    
    .feature-list {
      list-style: none;
      margin-top: 16px;
    }
    
    .feature-list li {
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
      color: var(--text-secondary);
    }
    
    .feature-list i {
      color: var(--primary-mid);
    }
    
    /* 成果数据 */
    .metrics-row {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 30px;
    }
    
    .metric-item {
      text-align: center;
      background: var(--highlight-bg);
      border-radius: 80px;
      padding: 24px 32px;
      min-width: 140px;
    }
    
    .metric-num {
      font-size: 38px;
      font-weight: 700;
      color: var(--primary-deep);
    }
    
    /* 证言 */
    .testimonial-grid {
      display: flex;
      gap: 28px;
      flex-wrap: wrap;
    }
    
    .testimonial-card {
      flex: 1 1 280px;
      background: white;
      border-radius: var(--radius-lg);
      padding: 32px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    
    .quote-mark {
      font-size: 52px;
      color: rgba(10,92,79,0.2);
      position: absolute;
      top: 12px;
      left: 20px;
    }
    
    /* FAQ */
    .accordion-faq {
      max-width: 800px;
      margin: 0 auto;
    }
    
    .faq-item {
      border-bottom: 1px solid rgba(10,92,79,0.15);
      padding: 20px 0;
      cursor: pointer;
    }
    
    .faq-question {
      font-weight: 700;
      display: flex;
      justify-content: space-between;
    }
    
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      color: var(--text-secondary);
      margin-top: 8px;
    }
    
    .faq-item.active .faq-answer {
      max-height: 200px;
    }
    
    /* CTA 区 */
    .cta-full {
      background: linear-gradient(135deg, #0A5C4F, #0D7B6B);
      color: white;
      text-align: center;
      padding: 80px 20px;
      border-radius: 0;
    }
    
    /* 页脚 */
    .site-footer {
      background: #0E3D35;
      color: #E0E8E6;
      padding: 60px 0 30px;
    }
    
    .footer-grid {
      display: flex;
      gap: 40px;
      flex-wrap: wrap;
      justify-content: space-between;
    }
    
    .footer-col h4 {
      color: white;
      margin-bottom: 16px;
    }
    
    .footer-col a {
      color: #C0CFCB;
      display: block;
      margin-bottom: 8px;
    }
    
    .footer-col a:hover {
      color: var(--accent-gold-light);
    }
    
    .social-icons i {
      font-size: 22px;
      margin-right: 16px;
      color: #C0CFCB;
    }
    
    .copyright {
      text-align: center;
      margin-top: 40px;
      color: #A0B0AB;
      font-size: 14px;
    }
    
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid {
        flex-direction: column;
      }
      .hero-right {
        min-height: 300px;
        width: 100%;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
    }
    
    @media (max-width: 640px) {
      .hero-title {
        font-size: 34px;
      }
      .badge-group {
        flex-direction: column;
        gap: 12px;
      }
      .sol-wide {
        flex-direction: column;
      }
    }