:root {
      --primary: #c91818;
      --primary-dark: #a01010;
      --primary-light: #fff0f0;
      --accent-gold: #e6a23c;
      --text-main: #1f2329;
      --text-muted: #59616d;
      --bg-light: #fcf8f8;
      --bg-white: #ffffff;
      --border-color: #f2d5d5;
      --border-soft: #eaeaea;
      --shadow-sm: 0 2px 8px rgba(201, 24, 24, 0.06);
      --shadow-md: 0 8px 24px rgba(201, 24, 24, 0.1);
      --shadow-lg: 0 16px 36px rgba(201, 24, 24, 0.14);
      --radius: 12px;
      --transition: all 0.3s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      padding: 8px 14px;
      font-size: 0.95rem;
      border-radius: 6px;
      transition: var(--transition);
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 8px;
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
    }

    .btn-primary {
      background: linear-gradient(135deg, #c91818, #e53935);
      color: #fff !important;
      box-shadow: 0 4px 14px rgba(201, 24, 24, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #a01010, #c91818);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(201, 24, 24, 0.45);
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary) !important;
      background: #fff;
    }

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

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .nav-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, #ffebeb 0%, #fff 60%, #fff6f6 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

    .hero-wrap {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      color: var(--primary);
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.6rem;
      font-weight: 800;
      line-height: 1.25;
      color: #1a1a1a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 32px;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      margin-bottom: 36px;
      flex-wrap: wrap;
    }

    .btn-hero-primary {
      padding: 14px 32px;
      font-size: 1.1rem;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      border-top: 1px solid #f0dede;
      padding-top: 24px;
    }

    .stat-item h4 {
      font-size: 1.8rem;
      color: var(--primary);
      font-weight: 800;
      margin-bottom: 4px;
    }

    .stat-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .hero-card-panel {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      border-bottom: 1px solid #f5e1e1;
      margin-bottom: 20px;
    }

    .panel-header h3 {
      font-size: 1.1rem;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .panel-tag {
      background: #e8f8f0;
      color: #10b981;
      padding: 3px 10px;
      border-radius: 12px;
      font-size: 0.75rem;
      font-weight: 600;
    }

    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .model-chip {
      background: var(--bg-light);
      border: 1px solid #f2dbdb;
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 0.82rem;
      font-weight: 500;
      color: #4b5563;
      transition: var(--transition);
    }

    .model-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-1px);
    }

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

    .feature-points li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .feature-points svg {
      flex-shrink: 0;
      color: var(--primary);
      margin-top: 2px;
    }

    /* 通用章节样式 */
    .section-block {
      padding: 70px 0;
      position: relative;
    }

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

    .section-tag {
      color: var(--primary);
      text-transform: uppercase;
      font-size: 0.85rem;
      font-weight: 700;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #1a1a1a;
      margin-bottom: 14px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    .intro-card {
      background: var(--bg-white);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .intro-icon {
      width: 52px;
      height: 52px;
      background: var(--primary-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      margin-bottom: 20px;
    }

    .intro-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #1a1a1a;
    }

    .intro-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* AIGC 服务能力矩阵 */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

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

    .service-card:hover {
      border-color: var(--border-color);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .service-card-top h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: #222;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .service-card-top p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    .service-badge {
      font-size: 0.75rem;
      padding: 2px 8px;
      border-radius: 4px;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: normal;
    }

    /* 流程步骤 */
    .step-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--bg-white);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius);
      padding: 28px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      position: relative;
    }

    .step-num {
      width: 44px;
      height: 44px;
      background: var(--primary);
      color: #fff;
      font-weight: 800;
      font-size: 1.2rem;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(201, 24, 24, 0.3);
    }

    .step-card h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 对比评测板块 */
    .compare-wrap {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .score-summary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 24px;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 20px;
    }

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

    .score-big {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .score-text h4 {
      font-size: 1.3rem;
      font-weight: 700;
      color: #1a1a1a;
      margin-bottom: 4px;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .compare-table-box {
      overflow-x: auto;
    }

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

    .compare-table th,
    .compare-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-soft);
      font-size: 0.92rem;
    }

    .compare-table th {
      background: #fff8f8;
      font-weight: 700;
      color: #1a1a1a;
    }

    .compare-table tr:hover td {
      background: #fffdfd;
    }

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

    /* 案例展示 */
    .media-gallery {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 30px;
    }

    .media-card {
      background: #fff;
      border-radius: var(--radius);
      border: 1px solid var(--border-soft);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-card .img-box {
      width: 100%;
      aspect-ratio: 16/9;
      background: #f0f0f0;
      overflow: hidden;
    }

    .media-card .img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

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

    .media-card-body {
      padding: 18px 20px;
    }

    .media-card-body h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .media-card-body p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .media-gallery-single {
      display: grid;
      grid-template-columns: 1fr 1.5fr;
      gap: 24px;
      align-items: center;
      background: #fff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-soft);
    }

    .square-img-box {
      width: 100%;
      aspect-ratio: 1/1;
      overflow: hidden;
      border-radius: 8px;
    }

    .square-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .promo-banners {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .banner-item {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-soft);
      box-shadow: var(--shadow-sm);
    }

    .banner-item img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

    .banner-item:hover img {
      transform: scale(1.02);
    }

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

    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f2f2f2;
      padding-top: 14px;
    }

    .user-avatar-badge {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .user-meta h5 {
      font-size: 0.95rem;
      font-weight: 700;
      color: #1a1a1a;
    }

    .user-meta span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-soft);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #1a1a1a;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: var(--transition);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #faf8f8;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 需求匹配与表单 */
    .form-section-wrap {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-info h3 {
      font-size: 1.8rem;
      font-weight: 800;
      color: #1a1a1a;
      margin-bottom: 16px;
    }

    .form-info p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 24px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .contact-item strong {
      color: var(--primary);
    }

    .agent-box {
      margin-top: 24px;
      padding: 16px;
      background: #fff5f5;
      border-left: 4px solid var(--primary);
      border-radius: 4px;
    }

    .agent-box h5 {
      font-size: 1rem;
      color: var(--primary-dark);
      margin-bottom: 6px;
    }

    .agent-box p {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .form-group label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d9d9d9;
      border-radius: 8px;
      font-size: 0.92rem;
      outline: none;
      transition: var(--transition);
      background: #fdfdfd;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(201, 24, 24, 0.1);
    }

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

    /* 行业资讯与文章 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .article-item {
      background: var(--bg-white);
      border: 1px solid var(--border-soft);
      border-radius: 8px;
      padding: 16px;
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.88rem;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #18191c;
      color: #9aa0a6;
      padding: 50px 0 24px;
      font-size: 0.88rem;
      border-top: 3px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .footer-col p {
      line-height: 1.6;
      margin-bottom: 12px;
    }

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

    .footer-links a {
      color: #9aa0a6;
      text-decoration: none;
      transition: var(--transition);
    }

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

    .qr-box {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .qr-box img {
      width: 100px;
      height: 100px;
      border-radius: 6px;
      background: #fff;
      padding: 4px;
    }

    .friend-links-area {
      border-top: 1px solid #282a2e;
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-area span {
      color: #fff;
      font-weight: 600;
    }

    .friend-links-area a {
      color: #9aa0a6;
      text-decoration: none;
      transition: var(--transition);
    }

    .friend-links-area a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #282a2e;
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #6b7280;
    }

    /* 浮动客服与返回顶部 */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      background: var(--primary);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      text-decoration: none;
      transition: var(--transition);
      border: none;
    }

    .float-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.08);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-wrap {
        grid-template-columns: 1fr;
      }
      .intro-grid,
      .step-timeline,
      .reviews-grid,
      .promo-banners,
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-section-wrap {
        grid-template-columns: 1fr;
      }
      .media-gallery-single {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .intro-grid,
      .step-timeline,
      .reviews-grid,
      .promo-banners,
      .media-gallery,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .form-section-wrap {
        padding: 20px;
      }
    }