:root {
      --primary: #0f766e;
      --primary-light: #14b8a6;
      --primary-dark: #115e59;
      --primary-bg: #f0fdfa;
      --accent: #0284c7;
      --text-main: #1e293b;
      --text-sub: #475569;
      --text-muted: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --border-focus: #2dd4bf;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
      --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.03);
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-page);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .section-spacing {
      padding: 72px 0;
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-bg);
      color: var(--primary);
      border: 1px solid #ccfbf1;
      border-radius: 9999px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.02em;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-sub);
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      text-decoration: none;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(15, 118, 110, 0.25);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
      box-shadow: 0 6px 16px rgba(15, 118, 110, 0.35);
      transform: translateY(-1px);
    }
    .btn-outline {
      background: #ffffff;
      color: var(--primary-dark);
      border-color: #cbd5e1;
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-bg);
      transform: translateY(-1px);
    }
    .btn-highlight {
      background: #0f172a;
      color: #ffffff;
      font-weight: 700;
      border: 1px solid #334155;
      box-shadow: 0 4px 14px rgba(15, 23, 42, 0.2);
    }
    .btn-highlight:hover {
      background: #1e293b;
      transform: translateY(-1px);
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }
    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-area .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-text {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-sub);
      transition: var(--transition);
      border-radius: 6px;
    }
    .nav-links a:hover {
      color: var(--primary);
      background-color: var(--primary-bg);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
      color: var(--text-main);
    }

    /* 首屏 Hero (无任何图片) */
    .hero-section {
      position: relative;
      background: linear-gradient(180deg, #f0fdfa 0%, #ffffff 100%);
      padding: 90px 0 70px;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-wrap {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      position: relative;
      z-index: 2;
    }
    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #99f6e4;
      border-radius: 9999px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }
    .hero-tag span {
      display: inline-block;
      width: 8px;
      height: 8px;
      background: var(--primary-light);
      border-radius: 50%;
    }
    .hero-title {
      font-size: 42px;
      font-weight: 800;
      line-height: 1.25;
      color: #0f172a;
      letter-spacing: -0.03em;
      margin-bottom: 20px;
      max-width: 920px;
    }
    .hero-title .tech-text {
      background: linear-gradient(135deg, var(--primary) 0%, #0284c7 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-sub);
      max-width: 760px;
      line-height: 1.65;
      margin-bottom: 34px;
    }
    .hero-btns {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
      flex-wrap: wrap;
    }
    .hero-portal-btn {
      padding: 13px 30px;
      font-size: 16px;
      font-weight: 700;
      background: linear-gradient(135deg, #0d9488 0%, #0284c7 100%);
      color: #ffffff;
      border-radius: 8px;
      box-shadow: 0 8px 20px rgba(13, 148, 136, 0.3);
      transition: var(--transition);
      border: none;
    }
    .hero-portal-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(13, 148, 136, 0.4);
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      margin-top: 10px;
    }
    .metric-box {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .metric-box:hover {
      border-color: var(--border-focus);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .metric-value {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台矩阵与模型支持 */
    .models-marquee-section {
      background: #ffffff;
      padding: 36px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .models-header {
      font-size: 13px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.05em;
      color: var(--text-muted);
      text-align: center;
      margin-bottom: 18px;
    }
    .models-chips-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-chip {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 12px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      transition: var(--transition);
    }
    .model-chip:hover {
      border-color: var(--primary-light);
      background: var(--primary-bg);
      color: var(--primary-dark);
    }

    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .intro-text-box h3 {
      font-size: 26px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.35;
    }
    .intro-text-box p {
      font-size: 15px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 18px;
    }
    .intro-features-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
      margin-top: 24px;
    }
    .intro-features-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--text-main);
      font-weight: 600;
    }
    .intro-features-list li svg {
      color: var(--primary);
      flex-shrink: 0;
    }
    .intro-visual-panel {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      padding: 24px;
    }
    .intro-visual-panel .ai-page-image {
      display: block;
      width: 100%;
      height: auto;
      border-radius: 10px;
      border: 1px solid var(--border-color);
    }

    /* 一站式核心服务能力网格 */
    .grid-3col {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border-radius: 12px;
      padding: 28px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      border-color: var(--border-focus);
      box-shadow: var(--shadow-lg);
      transform: translateY(-3px);
    }
    .service-icon-box {
      width: 46px;
      height: 46px;
      border-radius: 10px;
      background: var(--primary-bg);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .service-card h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .service-card p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }
    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }
    .service-tag {
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #334155;
      font-weight: 500;
    }

    /* 行业解决方案图文组合 */
    .solution-block {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 32px;
      margin-bottom: 30px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }
    .solution-block:last-child {
      margin-bottom: 0;
    }
    .solution-media {
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #f8fafc;
    }
    .solution-media img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }
    .solution-media:hover img {
      transform: scale(1.02);
    }
    .solution-content h3 {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .solution-content p {
      font-size: 15px;
      color: var(--text-sub);
      line-height: 1.65;
      margin-bottom: 20px;
    }
    .solution-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      margin-bottom: 22px;
    }
    .solution-points li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      font-size: 14px;
      color: var(--text-main);
    }
    .solution-points li svg {
      color: var(--primary);
      margin-top: 3px;
      flex-shrink: 0;
    }

    /* 标准交付流程 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }
    .step-card:hover {
      border-color: var(--border-focus);
      box-shadow: var(--shadow-md);
    }
    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
      margin-bottom: 16px;
    }
    .step-card h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .step-card p {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .case-card {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .case-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .case-card-body {
      padding: 24px;
    }
    .case-category {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .case-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .case-desc {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .case-result {
      background: var(--primary-bg);
      border-radius: 6px;
      padding: 10px 12px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary-dark);
      border: 1px solid #ccfbf1;
    }

    /* 对比评测专属板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #0f766e 0%, #064e3b 100%);
      color: #ffffff;
      border-radius: 16px;
      padding: 36px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .eval-highlight-left h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .eval-highlight-left p {
      font-size: 15px;
      color: #ccfbf1;
      max-width: 600px;
    }
    .eval-score-wrap {
      display: flex;
      align-items: baseline;
      gap: 8px;
      background: rgba(255, 255, 255, 0.1);
      padding: 16px 28px;
      border-radius: 12px;
      border: 1px solid rgba(255, 255, 255, 0.2);
    }
    .eval-score-num {
      font-size: 48px;
      font-weight: 900;
      color: #ffffff;
      line-height: 1;
    }
    .eval-score-sub {
      font-size: 16px;
      color: #99f6e4;
      font-weight: 600;
    }
    .table-container {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .eval-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }
    .eval-table tr:hover {
      background-color: #f0fdfa;
    }
    .badge-star {
      display: inline-block;
      padding: 4px 10px;
      background: #fef3c7;
      color: #b45309;
      font-weight: 700;
      border-radius: 4px;
      font-size: 12px;
    }

    /* Token比价与低成本 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .token-card:hover {
      border-color: var(--primary-light);
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }
    .token-model-name {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .token-pricing {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary-dark);
      margin: 14px 0 8px;
    }
    .token-discount {
      font-size: 12px;
      color: #059669;
      background: #ecfdf5;
      padding: 3px 8px;
      border-radius: 4px;
      display: inline-block;
      font-weight: 600;
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-text {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }
    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-bg);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
      border: 1px solid #ccfbf1;
    }
    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 折叠 */
    .faq-wrapper {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover {
      border-color: #cbd5e1;
    }
    .faq-trigger {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-trigger svg {
      transition: transform 0.25s ease;
      color: var(--text-muted);
      flex-shrink: 0;
      margin-left: 10px;
    }
    .faq-content {
      display: none;
      padding: 0 22px 18px;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.65;
      border-top: 1px solid #f8fafc;
    }
    .faq-item.active .faq-content {
      display: block;
    }
    .faq-item.active .faq-trigger svg {
      transform: rotate(180deg);
      color: var(--primary);
    }

    /* AI百科与行业资讯 */
    .knowledge-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .knowledge-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 26px;
      box-shadow: var(--shadow-sm);
    }
    .knowledge-card h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .knowledge-card p {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.65;
      margin-bottom: 14px;
    }
    .articles-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin-top: 24px;
    }
    .articles-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 12px;
    }
    .article-item-link {
      display: inline-flex;
      align-items: center;
      padding: 8px 14px;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 13px;
      font-weight: 500;
      color: var(--text-main);
      transition: var(--transition);
    }
    .article-item-link:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-bg);
    }

    /* 加盟代理与被动收入板块 */
    .agency-banner {
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      color: #ffffff;
      border-radius: 16px;
      padding: 40px;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 32px;
      align-items: center;
    }
    .agency-info h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 14px;
      color: #ffffff;
    }
    .agency-info p {
      font-size: 15px;
      color: #cbd5e1;
      line-height: 1.7;
      margin-bottom: 20px;
    }
    .agency-perks {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      list-style: none;
    }
    .agency-perks li {
      font-size: 13px;
      color: #94a3b8;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .agency-perks li svg {
      color: var(--primary-light);
      flex-shrink: 0;
    }
    .agency-action-box {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
    }
    .agency-action-box h4 {
      font-size: 18px;
      color: #ffffff;
      margin-bottom: 10px;
    }
    .agency-action-box p {
      font-size: 13px;
      color: #94a3b8;
      margin-bottom: 18px;
    }

    /* 需求匹配与联系我们（表单+客服） */
    .contact-form-layout {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      background: #ffffff;
      color: var(--text-main);
      transition: var(--transition);
      outline: none;
    }
    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }
    .contact-info-panel {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .contact-info-panel h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .contact-items-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-bottom: 24px;
    }
    .contact-items-list li {
      font-size: 14px;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .contact-items-list li strong {
      color: var(--text-main);
    }
    .qr-container {
      text-align: center;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px;
    }
    .qr-container img {
      width: 120px;
      height: 120px;
      margin: 0 auto 8px;
      display: block;
      border-radius: 6px;
    }
    .qr-container p {
      font-size: 12px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 服务网络 */
    .network-bar {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      text-align: center;
    }
    .network-nodes {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 16px;
    }
    .network-node {
      font-size: 13px;
      padding: 6px 14px;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: var(--text-main);
      font-weight: 500;
    }

    /* 页脚与友情链接 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 32px;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 40px;
    }
    .footer-brand p {
      font-size: 13px;
      color: var(--text-sub);
      margin-top: 12px;
      line-height: 1.6;
      max-width: 320px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links-list a {
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .footer-links-list a:hover {
      color: var(--primary);
    }
    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-bottom: 24px;
    }
    .friend-links-title {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }
    .friend-links-wrap a {
      font-size: 13px;
      color: var(--text-muted);
      transition: var(--transition);
    }
    .friend-links-wrap a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 浮动客服挂件 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(15, 118, 110, 0.35);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      position: relative;
    }
    .float-btn:hover {
      transform: scale(1.08);
    }
    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 12px;
      box-shadow: var(--shadow-lg);
      display: none;
      width: 140px;
      text-align: center;
    }
    .float-qr-popup img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      margin-bottom: 6px;
    }
    .float-qr-popup span {
      font-size: 11px;
      color: var(--text-sub);
      display: block;
      font-weight: 500;
    }
    .float-btn:hover .float-qr-popup {
      display: block;
    }
    .back-to-top {
      display: none;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .back-to-top.show {
      display: flex;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3col, .case-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid, .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid, .solution-block, .agency-banner, .contact-form-layout {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 12px;
      }
      .grid-3col, .case-grid, .reviews-grid, .steps-grid, .token-grid, .knowledge-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
    }