:root {
      --primary-crimson: #c81e1e;
      --primary-darkred: #9b1c1c;
      --primary-brightred: #e02424;
      --accent-gold: #f59e0b;
      --bg-light: #fff8f8;
      --bg-white: #ffffff;
      --bg-subtle: #fef2f2;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --border-color: #fde8e8;
      --shadow-sm: 0 2px 8px rgba(200, 30, 30, 0.06);
      --shadow-md: 0 6px 20px rgba(200, 30, 30, 0.1);
      --shadow-hover: 0 12px 28px rgba(200, 30, 30, 0.16);
      --radius: 12px;
      --max-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      width: 100%;
      overflow-x: hidden;
    }

    a {
      color: var(--primary-crimson);
      text-decoration: none;
      transition: all 0.2s ease;
    }

    a:hover {
      color: var(--primary-darkred);
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      max-height: 42px;
      width: auto;
      display: block;
    }

    .brand-title-wrap {
      display: flex;
      flex-direction: column;
    }

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

    .brand-tag {
      font-size: 11px;
      color: var(--text-light);
      line-height: 1;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-crimson);
      background-color: var(--bg-subtle);
    }

    .header-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-nav {
      background: linear-gradient(135deg, var(--primary-brightred), var(--primary-crimson));
      color: #ffffff !important;
      padding: 8px 18px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 20px;
      box-shadow: 0 4px 12px rgba(224, 36, 36, 0.25);
    }

    .btn-nav:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(224, 36, 36, 0.35);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 首屏 HERO SECTION - 禁现任何图片 */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 50% 20%, #ffeef0 0%, #fff8f8 70%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: #fde8e8;
      border: 1px solid #fbd5d5;
      border-radius: 30px;
      color: var(--primary-darkred);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 40px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
      font-weight: 400;
    }

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

    .btn-primary-lg {
      background: linear-gradient(135deg, #e02424, #b91c1c);
      color: #ffffff !important;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 30px;
      box-shadow: 0 8px 24px rgba(224, 36, 36, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-primary-lg:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(224, 36, 36, 0.4);
    }

    .btn-outline-lg {
      background-color: #ffffff;
      color: var(--primary-crimson) !important;
      border: 2px solid var(--primary-crimson);
      font-size: 16px;
      font-weight: 700;
      padding: 13px 32px;
      border-radius: 30px;
    }

    .btn-outline-lg:hover {
      background-color: var(--bg-subtle);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

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

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-crimson);
      line-height: 1.1;
      margin-bottom: 4px;
    }

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

    /* 全局 Section 通用样式 */
    .section-padding {
      padding: 70px 0;
    }

    .section-bg-white {
      background-color: #ffffff;
    }

    .section-bg-light {
      background-color: var(--bg-light);
    }

    .section-bg-subtle {
      background-color: var(--bg-subtle);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-crimson);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 30px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 关于我们 / 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 24px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .about-content p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .feature-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .feature-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: var(--text-main);
    }

    .feature-icon {
      width: 20px;
      height: 20px;
      background-color: #fde8e8;
      color: var(--primary-crimson);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      font-weight: 900;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .about-card-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
    }

    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }

    .model-tag {
      background-color: var(--bg-subtle);
      border: 1px solid #fbd5d5;
      color: var(--primary-darkred);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 20px;
    }

    /* 服务能力 & 一站式制作 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #fbd5d5;
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, #fde8e8, #fee2e2);
      color: var(--primary-crimson);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .service-card h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

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

    /* 行业方案 & 需求匹配 */
    .solution-tabs-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .solution-card {
      background: #ffffff;
      border-top: 4px solid var(--primary-crimson);
      border-radius: 8px;
      padding: 24px 20px;
      box-shadow: var(--shadow-sm);
      border-left: 1px solid var(--border-color);
      border-right: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .solution-card h4 {
      font-size: 17px;
      font-weight: 700;
      color: var(--primary-darkred);
      margin-bottom: 10px;
    }

    .solution-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 标准流程 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-crimson);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 16px;
      font-size: 14px;
    }

    .step-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 对比评测 - 突出 9.9分 与 5星 */
    .rating-banner {
      background: linear-gradient(135deg, #9b1c1c, #c81e1e);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 30px 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-md);
    }

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-big {
      font-size: 48px;
      font-weight: 900;
      line-height: 1;
      color: #fef08a;
    }

    .score-info h4 {
      font-size: 20px;
      font-weight: 700;
    }

    .stars {
      color: #f59e0b;
      font-size: 18px;
      letter-spacing: 2px;
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .compare-table th {
      background-color: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }

    .highlight-col {
      background-color: #fff5f5;
      font-weight: 700;
      color: var(--primary-crimson);
    }

    /* Token 比价 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
    }

    .token-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
      border-bottom: 1px dashed var(--border-color);
      padding-bottom: 10px;
    }

    .model-name {
      font-weight: 700;
      font-size: 16px;
      color: var(--text-main);
    }

    .token-price {
      font-size: 16px;
      font-weight: 800;
      color: var(--primary-crimson);
    }

    .token-desc {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* 加盟代理 */
    .agency-box {
      background: linear-gradient(135deg, #fff1f2, #ffe4e6);
      border: 2px dashed #fecdd3;
      border-radius: var(--radius);
      padding: 40px;
      text-align: center;
    }

    .agency-title {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary-darkred);
      margin-bottom: 12px;
    }

    .agency-desc {
      font-size: 15px;
      color: var(--text-main);
      max-width: 700px;
      margin: 0 auto 24px;
    }

    /* 案例展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-img-wrap {
      width: 100%;
      height: 180px;
      overflow: hidden;
      background-color: #f3f4f6;
    }

    .ai-page-image,
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .case-content {
      padding: 20px;
    }

    .case-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .case-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

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

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

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      background: var(--bg-subtle);
      color: var(--primary-crimson);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      border: 1px solid #fbd5d5;
    }

    .reviewer-name {
      font-size: 14px;
      font-weight: 700;
    }

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

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

    /* 行业资讯 & AI百科 */
    .news-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 30px;
    }

    .news-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .news-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .news-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
    }

    .news-title:hover {
      color: var(--primary-crimson);
    }

    .news-tag {
      font-size: 12px;
      color: var(--text-light);
      background: var(--bg-light);
      padding: 2px 8px;
      border-radius: 4px;
    }

    .wiki-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
    }

    .wiki-box h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 12px;
      border-bottom: 2px solid var(--border-color);
      padding-bottom: 8px;
    }

    .wiki-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 13px;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 20px;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
    }

    .faq-question:hover {
      background-color: var(--bg-subtle);
    }

    .faq-toggle-icon {
      font-size: 18px;
      color: var(--primary-crimson);
      transition: transform 0.3s ease;
    }

    .faq-answer {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-muted);
      display: none;
      line-height: 1.6;
      border-top: 1px solid #fef2f2;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    /* 联系我们 & 表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
    }

    .contact-info-card h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 20px;
      color: var(--primary-darkred);
    }

    .contact-detail-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 14px;
    }

    .qr-code-box {
      margin-top: 20px;
      text-align: center;
      background: var(--bg-light);
      padding: 16px;
      border-radius: 8px;
      border: 1px dashed var(--border-color);
    }

    .qr-code-box img {
      max-width: 140px;
      height: auto;
      border-radius: 6px;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
    }

    .form-card h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid #d1d5db;
      border-radius: 6px;
      outline: none;
      transition: border 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary-crimson);
      box-shadow: 0 0 0 3px rgba(200, 30, 30, 0.1);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    .btn-submit {
      width: 100%;
      background: linear-gradient(135deg, #e02424, #b91c1c);
      color: #ffffff;
      border: none;
      padding: 12px;
      font-size: 15px;
      font-weight: 700;
      border-radius: 6px;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(224, 36, 36, 0.25);
    }

    .btn-submit:hover {
      opacity: 0.95;
    }

    /* 服务网络 */
    .network-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .network-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px;
      text-align: center;
      font-size: 14px;
      font-weight: 600;
    }

    /* 页脚 */
    .site-footer {
      background-color: #111827;
      color: #9ca3af;
      padding: 60px 0 30px;
      font-size: 13px;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
      border-bottom: 1px solid #1f2937;
      padding-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-col ul a {
      color: #9ca3af;
    }

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

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 10px;
    }

    .friend-links a {
      color: #9ca3af;
      background: #1f2937;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 12px;
    }

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

    .footer-bottom {
      text-align: center;
      color: #6b7280;
      font-size: 12px;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--primary-crimson);
      color: #ffffff;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 6px 20px rgba(224, 36, 36, 0.4);
      font-size: 22px;
      cursor: pointer;
    }

    .float-kefu:hover {
      transform: scale(1.08);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-stats-grid,
      .services-grid,
      .solution-tabs-grid,
      .workflow-steps,
      .token-grid,
      .cases-grid,
      .reviews-grid,
      .network-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .about-grid,
      .contact-wrapper,
      .news-grid,
      .footer-top {
        grid-template-columns: 1fr;
      }

      .hero-title {
        font-size: 30px;
      }
    }

    @media (max-width: 640px) {
      .nav-links {
        display: none;
      }

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

      .hero-stats-grid,
      .services-grid,
      .solution-tabs-grid,
      .workflow-steps,
      .token-grid,
      .cases-grid,
      .reviews-grid,
      .network-grid {
        grid-template-columns: 1fr;
      }

      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }

      .rating-score-box {
        flex-direction: column;
        gap: 8px;
      }
    }