:root {
      --primary: #0052ff;
      --primary-hover: #0041cc;
      --accent-orange: #ff5c00;
      --accent-green: #00d084;
      --accent-purple: #7928ca;
      --accent-yellow: #ffb800;
      --dark-text: #111827;
      --muted-text: #4b5563;
      --light-text: #6b7280;
      --bg-base: #f8fafc;
      --card-bg: #ffffff;
      --border-color: #e2e8f0;
      --border-focus: #0052ff;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(0, 82, 255, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 35px -10px rgba(0, 82, 255, 0.12), 0 10px 20px -5px rgba(255, 92, 0, 0.06);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--dark-text);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(0, 82, 255, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(255, 92, 0, 0.03) 0%, transparent 40%),
                  var(--bg-base);
      min-height: 100vh;
      overflow-x: hidden;
    }

    /* 统一主容器规范 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 导航栏 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-logo-box img {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark-text);
      letter-spacing: -0.5px;
    }

    .brand-tag {
      background: #ff5c00;
      color: #fff;
      font-size: 11px;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 20px;
      margin-left: 6px;
    }

    /* 导航链接按要求设置 gap: 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 600;
      color: var(--muted-text);
      text-decoration: none;
      transition: color 0.2s ease, transform 0.2s ease;
    }

    .nav-links li a:hover {
      color: var(--primary);
      transform: translateY(-1px);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-nav-primary {
      background: var(--primary);
      color: #ffffff;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      font-size: 14px;
      font-weight: 700;
      box-shadow: 0 4px 12px rgba(0, 82, 255, 0.25);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--primary);
    }

    .btn-nav-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 16px rgba(0, 82, 255, 0.35);
      transform: translateY(-2px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    /* 通用区块排版 */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-head {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--accent-orange);
      background: rgba(255, 92, 0, 0.1);
      padding: 4px 12px;
      border-radius: 30px;
      margin-bottom: 12px;
      border: 1px solid rgba(255, 92, 0, 0.2);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 首屏 HERO (严禁包含图片，纯CSS/几何/撞色构建) */
    .hero-section {
      padding: 70px 0 90px;
      background: linear-gradient(180deg, #ffffff 0%, rgba(240, 246, 255, 0.7) 100%);
      border-bottom: 2px solid var(--border-color);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #eff6ff;
      border: 1.5px solid #bfdbfe;
      padding: 6px 16px;
      border-radius: 40px;
      margin-bottom: 24px;
    }

    .hero-badge-tag {
      background: var(--accent-orange);
      color: #fff;
      font-size: 12px;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 20px;
    }

    .hero-badge-text {
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      color: var(--dark-text);
      line-height: 1.25;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero-title .highlight-blue {
      color: var(--primary);
    }

    .hero-title .highlight-orange {
      color: var(--accent-orange);
      position: relative;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--muted-text);
      line-height: 1.6;
      max-width: 820px;
      margin: 0 auto 36px;
      font-weight: 500;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-hero-official {
      background: #ff5c00;
      color: #ffffff;
      padding: 16px 36px;
      font-size: 17px;
      font-weight: 800;
      border-radius: var(--radius-md);
      text-decoration: none;
      box-shadow: 0 10px 25px rgba(255, 92, 0, 0.35);
      transition: all 0.25s ease;
      display: inline-flex;
      align-items: center;
      gap: 10px;
      border: 2px solid #ff5c00;
    }

    .btn-hero-official:hover {
      background: #e05200;
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 14px 30px rgba(255, 92, 0, 0.45);
    }

    .btn-hero-secondary {
      background: #ffffff;
      color: var(--dark-text);
      padding: 16px 32px;
      font-size: 17px;
      font-weight: 700;
      border-radius: var(--radius-md);
      text-decoration: none;
      border: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f0f7ff;
      transform: translateY(-2px);
    }

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease, border-color 0.2s ease;
    }

    .metric-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .metric-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 6px;
    }

    .metric-num.orange {
      color: var(--accent-orange);
    }

    .metric-num.purple {
      color: var(--accent-purple);
    }

    .metric-num.green {
      color: var(--accent-green);
    }

    .metric-label {
      font-size: 14px;
      font-weight: 700;
      color: var(--muted-text);
    }

    /* 平台介绍 & 核心能力 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
      overflow: hidden;
    }

    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 6px;
      height: 100%;
      background: var(--primary);
      opacity: 0;
      transition: opacity 0.25s ease;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: #cbd5e1;
    }

    .feature-card:hover::before {
      opacity: 1;
    }

    .feature-icon-badge {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: #eff6ff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 20px;
      border: 1.5px solid #dbeafe;
    }

    .feature-card.orange .feature-icon-badge {
      background: #fff7ed;
      color: var(--accent-orange);
      border-color: #ffedd5;
    }

    .feature-card.green .feature-icon-badge {
      background: #ecfdf5;
      color: var(--accent-green);
      border-color: #d1fae5;
    }

    .feature-title {
      font-size: 19px;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .feature-desc {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 场景矩阵卡片流 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scenario-item {
      background: #ffffff;
      border: 1.5px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .scenario-item:hover {
      border-color: var(--accent-orange);
      transform: translateY(-4px);
      box-shadow: 0 10px 20px rgba(255, 92, 0, 0.08);
    }

    .scenario-tag {
      align-self: flex-start;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      background: #eff6ff;
      padding: 3px 8px;
      border-radius: 6px;
      margin-bottom: 12px;
    }

    .scenario-name {
      font-size: 17px;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .scenario-detail {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.55;
    }

    /* 支持模型标签云 */
    .models-showcase {
      background: #ffffff;
      border: 2px dashed #cbd5e1;
      border-radius: var(--radius-lg);
      padding: 36px 30px;
      margin-top: 40px;
      text-align: center;
    }

    .models-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 20px;
    }

    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-pill {
      background: #f1f5f9;
      color: var(--dark-text);
      font-size: 13px;
      font-weight: 700;
      padding: 8px 16px;
      border-radius: 30px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }

    .model-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: scale(1.05);
    }

    /* 对比评测板块 */
    .rating-banner {
      background: linear-gradient(135deg, #0052ff 0%, #1e1b4b 100%);
      border-radius: var(--radius-lg);
      padding: 40px;
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: 0 15px 30px rgba(0, 82, 255, 0.2);
    }

    .rating-score-box {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .score-big {
      font-size: 56px;
      font-weight: 900;
      color: #ffb800;
      line-height: 1;
    }

    .score-total {
      font-size: 20px;
      font-weight: 700;
      color: #cbd5e1;
    }

    .stars-icon {
      color: #ffb800;
      font-size: 22px;
      letter-spacing: 2px;
      margin-top: 6px;
    }

    .table-container {
      overflow-x: auto;
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 15px;
    }

    .comparison-table th {
      background: #f8fafc;
      font-weight: 800;
      color: var(--dark-text);
    }

    .comparison-table th.highlight-col,
    .comparison-table td.highlight-col {
      background: #eff6ff;
      color: var(--primary);
      font-weight: 800;
      border-left: 2px solid #bfdbfe;
      border-right: 2px solid #bfdbfe;
    }

    .badge-win {
      display: inline-block;
      background: #00d084;
      color: #ffffff;
      font-size: 11px;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 20px;
      margin-left: 6px;
    }

    /* 标准流程 4 步 */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px 20px;
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 44px;
      height: 44px;
      background: var(--accent-orange);
      color: #ffffff;
      font-size: 18px;
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .step-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.5;
    }

    /* 案例展示区 (合规引入图片并添加图片外容器) */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .showcase-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .media-container {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-container.square-box {
      aspect-ratio: 1 / 1;
    }

    .media-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .showcase-card:hover .media-container img {
      transform: scale(1.05);
    }

    .showcase-body {
      padding: 22px;
    }

    .showcase-badge {
      font-size: 12px;
      font-weight: 700;
      color: #ff5c00;
      background: #fff7ed;
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 8px;
    }

    .showcase-title {
      font-size: 17px;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .showcase-desc {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.5;
    }

    /* Token 比价与价格体系 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .pricing-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
    }

    .pricing-card.featured {
      border: 3px solid var(--accent-orange);
      transform: scale(1.03);
      box-shadow: 0 15px 35px rgba(255, 92, 0, 0.15);
    }

    .pricing-badge-popular {
      position: absolute;
      top: -14px;
      right: 24px;
      background: var(--accent-orange);
      color: #ffffff;
      font-size: 12px;
      font-weight: 800;
      padding: 4px 12px;
      border-radius: 20px;
    }

    .pricing-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

    .price-value {
      font-size: 40px;
      font-weight: 900;
      color: var(--dark-text);
      margin-bottom: 6px;
    }

    .price-unit {
      font-size: 14px;
      font-weight: 500;
      color: var(--light-text);
    }

    .pricing-features-list {
      list-style: none;
      margin: 24px 0 32px;
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
    }

    .pricing-features-list li {
      font-size: 14px;
      color: var(--muted-text);
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pricing-features-list li::before {
      content: "✓";
      color: var(--accent-green);
      font-weight: 900;
      font-size: 16px;
    }

    /* 用户真实评价 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--dark-text);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
    }

    .reviewer-name {
      font-size: 15px;
      font-weight: 800;
      color: var(--dark-text);
    }

    .reviewer-role {
      font-size: 12px;
      color: var(--light-text);
    }

    /* FAQ 手风琴折叠面板 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item.active {
      border-color: var(--primary);
    }

    .faq-header {
      width: 100%;
      background: none;
      border: none;
      padding: 20px 24px;
      text-align: left;
      font-size: 16px;
      font-weight: 800;
      color: var(--dark-text);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
    }

    .faq-header:hover {
      color: var(--primary);
    }

    .faq-icon-arrow {
      font-size: 18px;
      transition: transform 0.25s ease;
      color: var(--primary);
    }

    .faq-item.active .faq-icon-arrow {
      transform: rotate(180deg);
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
      padding: 0 24px;
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    .faq-item.active .faq-body {
      max-height: 300px;
      padding: 16px 24px 20px;
      border-top: 1px solid var(--border-color);
    }

    /* 需求匹配表单与联系我们 */
    .contact-container {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .contact-info-col {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-item-group {
      margin-top: 24px;
    }

    .contact-detail-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 15px;
      color: var(--muted-text);
    }

    .contact-qr-wrap {
      margin-top: 20px;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      border: 1px solid var(--border-color);
    }

    .contact-qr-wrap img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      border-radius: var(--radius-sm);
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 14px;
      font-weight: 700;
      color: var(--dark-text);
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--dark-text);
      background: #ffffff;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--primary);
    }

    .btn-submit-form {
      background: var(--primary);
      color: #ffffff;
      border: none;
      padding: 16px;
      border-radius: var(--radius-md);
      font-size: 16px;
      font-weight: 800;
      cursor: pointer;
      box-shadow: 0 8px 20px rgba(0, 82, 255, 0.25);
      transition: all 0.2s ease;
    }

    .btn-submit-form:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
    }

    /* 资讯与百科文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-link-card {
      background: #ffffff;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-decoration: none;
      color: inherit;
      display: block;
      transition: all 0.2s ease;
    }

    .article-link-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
      box-shadow: var(--shadow-sm);
    }

    .article-date {
      font-size: 12px;
      color: var(--light-text);
      margin-bottom: 8px;
    }

    .article-title {
      font-size: 16px;
      font-weight: 800;
      color: var(--dark-text);
      line-height: 1.4;
      margin-bottom: 8px;
    }

    .article-snippet {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.5;
    }

    /* 页脚主区域 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 4px solid var(--accent-orange);
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s ease;
    }

    .footer-col ul li a:hover {
      color: #ffffff;
    }

    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-friend-links a {
      color: #cbd5e1;
      text-decoration: none;
      font-size: 13px;
      background: rgba(255, 255, 255, 0.06);
      padding: 4px 10px;
      border-radius: 4px;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .footer-friend-links a:hover {
      background: var(--primary);
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

    /* 悬浮侧栏互动客服 */
    .float-dock {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .dock-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 2px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--dark-text);
      text-decoration: none;
      font-weight: 800;
      font-size: 13px;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .dock-btn.primary-dock {
      background: var(--accent-orange);
      color: #ffffff;
      border-color: var(--accent-orange);
    }

    .dock-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式断点 */
    @media (max-width: 1024px) {
      .hero-title {
        font-size: 34px;
      }
      .features-grid,
      .pricing-grid,
      .reviews-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .site-header {
        padding: 0 10px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 0;
        border-bottom: 2px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show-mobile {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        display: block;
        padding: 12px;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .features-grid,
      .scenario-grid,
      .pricing-grid,
      .reviews-grid,
      .showcase-grid,
      .articles-grid,
      .process-steps {
        grid-template-columns: 1fr;
      }
      .contact-container {
        grid-template-columns: 1fr;
        padding: 24px;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
    }