:root {
      --primary: #1d4ed8;
      --primary-hover: #1e40af;
      --primary-light: #eff6ff;
      --accent-blue: #2563eb;
      --vivid-cyan: #0284c7;
      --dark-text: #0f172a;
      --body-text: #334155;
      --muted-text: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 4px 12px -2px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 12px 24px -4px rgba(30, 64, 175, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.25s ease-in-out;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--body-text);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    img {
      display: block;
      max-width: 100%;
      height: auto;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-logo-wrap {
      max-width: 160px;
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 500;
      color: var(--dark-text);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }

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

    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #1d4ed8 0%, #2563eb 100%);
      color: #ffffff !important;
      padding: 9px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-md);
      box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
      transition: var(--transition);
    }

    .btn-portal:hover {
      background: linear-gradient(135deg, #1e40af 0%, #1d4ed8 100%);
      box-shadow: 0 6px 14px rgba(30, 64, 175, 0.35);
      transform: translateY(-1px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-btn span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--dark-text);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero 区 (严格无图片) */
    .hero-section {
      background: linear-gradient(180deg, #eff6ff 0%, #f8fafc 100%);
      padding: 72px 0 54px;
      text-align: center;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background-color: #dbeafe;
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      border-radius: 30px;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 38px;
      line-height: 1.3;
      color: var(--dark-text);
      font-weight: 800;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--body-text);
      max-width: 820px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-hero-primary {
      padding: 13px 32px;
      font-size: 16px;
      font-weight: 600;
      background: #1d4ed8;
      color: #ffffff !important;
      border-radius: var(--radius-md);
      box-shadow: 0 6px 18px rgba(29, 78, 216, 0.3);
      transition: var(--transition);
    }

    .btn-hero-primary:hover {
      background: #1e40af;
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(29, 78, 216, 0.4);
    }

    .btn-hero-secondary {
      padding: 13px 28px;
      font-size: 16px;
      font-weight: 600;
      background: #ffffff;
      color: var(--primary);
      border: 1px solid #bfdbfe;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .btn-hero-secondary:hover {
      background: #f1f5f9;
      border-color: #93c5fd;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 980px;
      margin: 0 auto;
    }

    .hero-stat-card {
      background: #ffffff;
      padding: 20px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .hero-stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .hero-stat-label {
      font-size: 13px;
      color: var(--muted-text);
      font-weight: 500;
    }

    /* 区域通用样式 */
    .section-block {
      padding: 72px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      padding: 3px 10px;
      background: var(--primary-light);
      border-radius: 4px;
    }

    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 15px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 平台介绍与关于我们 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 22px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 16px;
    }

    .about-content p {
      font-size: 15px;
      color: var(--body-text);
      margin-bottom: 16px;
      line-height: 1.8;
    }

    .about-feature-list {
      list-style: none;
      margin-top: 20px;
    }

    .about-feature-list li {
      font-size: 14px;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--dark-text);
    }

    .about-feature-list li::before {
      content: "✔";
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 18px;
      height: 18px;
      background: #dbeafe;
      color: var(--primary);
      border-radius: 50%;
      font-size: 11px;
      font-weight: 700;
    }

    .model-pills-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .model-pills-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 14px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .model-tag {
      font-size: 12px;
      font-weight: 600;
      padding: 6px 12px;
      background: #f1f5f9;
      color: #1e293b;
      border-radius: 6px;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .model-tag:hover {
      background: #dbeafe;
      color: var(--primary);
      border-color: #bfdbfe;
    }

    /* AIGC 服务与场景卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: #93c5fd;
    }

    .service-card-top h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 10px;
    }

    .service-card-top p {
      font-size: 14px;
      color: var(--body-text);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .service-tag-item {
      font-size: 11px;
      background: #eff6ff;
      color: var(--primary);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 500;
    }

    /* 行业解决方案与流程 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
    }

    .step-index {
      font-size: 32px;
      font-weight: 800;
      color: #93c5fd;
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* 对比评测 板块 (9.9分 / 5星 / 满分10分) */
    .review-score-banner {
      background: linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 36px;
      box-shadow: var(--shadow-md);
    }

    .review-left h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 8px;
      color: #ffffff;
    }

    .review-left p {
      font-size: 15px;
      color: #dbeafe;
    }

    .review-rating-box {
      text-align: right;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 22px;
      letter-spacing: 2px;
      margin-bottom: 4px;
    }

    .review-score-big {
      font-size: 42px;
      font-weight: 900;
      line-height: 1;
      color: #ffffff;
    }

    .review-score-sub {
      font-size: 13px;
      color: #bfdbfe;
      margin-top: 4px;
    }

    .comparison-table-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .comparison-table th, 
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--dark-text);
    }

    .comparison-table tr:last-child td {
      border-bottom: none;
    }

    .table-col-highlight {
      background: #eff6ff;
      font-weight: 600;
      color: var(--primary);
    }

    /* 案例中心 (素材图引入) */
    .case-gallery {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      margin-bottom: 24px;
    }

    .case-sub-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .case-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .case-media-box {
      position: relative;
      background: #e2e8f0;
      overflow: hidden;
    }

    .case-media-box img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .case-item:hover .case-media-box img {
      transform: scale(1.03);
    }

    .case-info {
      padding: 18px 20px;
    }

    .case-info h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 6px;
    }

    .case-info p {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.5;
    }

    /* 加盟代理与被动收入板块 */
    .agent-box {
      background: linear-gradient(135deg, #f0fdf4 0%, #eff6ff 100%);
      border: 1px solid #bfdbfe;
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 20px;
    }

    .agent-grid {
      display: grid;
      grid-template-columns: 1fr 1fr 1fr;
      gap: 20px;
      margin-top: 24px;
    }

    .agent-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 20px;
      border: 1px solid #e2e8f0;
      box-shadow: var(--shadow-sm);
    }

    .agent-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
    }

    .agent-card p {
      font-size: 13px;
      color: var(--body-text);
      line-height: 1.6;
    }

    /* 6条真实用户评论 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-text {
      font-size: 14px;
      color: var(--body-text);
      line-height: 1.7;
      margin-bottom: 16px;
      position: relative;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .testimonial-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #dbeafe;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .testimonial-meta h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--dark-text);
    }

    .testimonial-meta span {
      font-size: 12px;
      color: var(--muted-text);
    }

    /* 需求匹配表单与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
    }

    .form-panel {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--dark-text);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      background: #ffffff;
      color: var(--dark-text);
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .btn-submit {
      width: 100%;
      padding: 12px;
      font-size: 15px;
      font-weight: 700;
      background: var(--primary);
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-submit:hover {
      background: var(--primary-hover);
    }

    .contact-info-panel {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-item-group {
      margin-bottom: 20px;
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 14px;
      font-size: 14px;
      color: var(--dark-text);
    }

    .contact-qr-box {
      text-align: center;
      background: #f8fafc;
      padding: 18px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .contact-qr-img {
      max-width: 140px;
      margin: 0 auto 10px;
    }

    .contact-qr-note {
      font-size: 12px;
      color: var(--muted-text);
    }

    /* 常见问题 FAQ 折叠面板 (>=10个) */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-header {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 15px;
      font-weight: 600;
      color: var(--dark-text);
      user-select: none;
    }

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

    .faq-icon {
      font-size: 18px;
      font-weight: 400;
      color: var(--muted-text);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #f8fafc;
    }

    .faq-item.active .faq-body {
      padding: 16px 22px 20px;
      max-height: 200px;
      border-top: 1px solid #f1f5f9;
    }

    .faq-body p {
      font-size: 14px;
      color: var(--body-text);
      line-height: 1.7;
    }

    /* 行业资讯与最新文章 */
    .articles-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-card h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-text);
      margin-bottom: 8px;
      line-height: 1.5;
    }

    .article-card p {
      font-size: 13px;
      color: var(--muted-text);
      line-height: 1.6;
      margin-bottom: 14px;
    }

    .article-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .article-link:hover {
      text-decoration: underline;
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 56px 0 28px;
      border-top: 1px solid #1e293b;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      color: #94a3b8;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 9px;
    }

    .footer-links li a {
      font-size: 13px;
      color: #94a3b8;
    }

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

    .friendship-links-wrap {
      border-top: 1px solid #1e293b;
      padding: 20px 0;
      font-size: 13px;
    }

    .friendship-links-title {
      font-weight: 600;
      color: #cbd5e1;
      margin-right: 12px;
      display: inline-block;
    }

    .friendship-links-wrap a {
      color: #94a3b8;
      margin-right: 16px;
      display: inline-block;
      margin-bottom: 6px;
    }

    .friendship-links-wrap a:hover {
      color: #38bdf8;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 12px;
      color: #64748b;
    }

    /* 悬浮工具栏 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(29, 78, 216, 0.35);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      font-size: 13px;
      font-weight: 700;
    }

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

    /* 响应式样式 */
    @media (max-width: 992px) {
      .services-grid,
      .testimonial-grid,
      .articles-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps,
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .contact-wrapper,
      .case-gallery {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .agent-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        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;
      }

      .mobile-menu-btn {
        display: block;
      }

      .hero-title {
        font-size: 26px;
      }

      .hero-desc {
        font-size: 15px;
      }

      .services-grid,
      .testimonial-grid,
      .articles-list,
      .case-sub-grid,
      .hero-stats-grid,
      .workflow-steps {
        grid-template-columns: 1fr;
      }

      .review-score-banner {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }

      .review-rating-box {
        text-align: center;
      }

      .footer-top-grid {
        grid-template-columns: 1fr;
      }
    }