:root {
      --primary: #0F52FF;
      --primary-hover: #003CD6;
      --accent: #FF5500;
      --accent-soft: #FFF2EB;
      --accent-alt: #00BA7C;
      --accent-yellow: #FFB800;
      --bg-page: #F8FAFD;
      --bg-card: #FFFFFF;
      --text-main: #131B2E;
      --text-sub: #526077;
      --text-muted: #7E8DA6;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 12px rgba(15, 82, 255, 0.05);
      --shadow-hover: 0 12px 28px rgba(15, 82, 255, 0.12);
      --radius: 12px;
      --radius-lg: 18px;
    }
    * {
      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-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    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, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
      margin: 0;
      padding: 0;
    }
    .nav-links li {
      margin: 0;
      padding: 0;
    }
    .nav-links a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: 6px;
      display: inline-block;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background: #F0F5FF;
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 700;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--primary);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(15, 82, 255, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
    }
    .btn-accent {
      background: var(--accent);
      color: #FFFFFF;
      box-shadow: 0 4px 14px rgba(255, 85, 0, 0.25);
    }
    .btn-accent:hover {
      background: #E04B00;
      transform: translateY(-2px);
    }
    .btn-outline {
      border-color: var(--primary);
      color: var(--primary);
      background: #FFFFFF;
    }
    .btn-outline:hover {
      background: #F0F5FF;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 首屏 Hero */
    .hero-section {
      background: linear-gradient(135deg, #F0F6FF 0%, #FFFFFF 50%, #FFF5ED 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-inner {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #E8F0FE;
      color: var(--primary);
      border-radius: 30px;
      font-size: 0.88rem;
      font-weight: 700;
      margin-bottom: 24px;
      border: 1px solid rgba(15, 82, 255, 0.15);
    }
    .hero-badge-tag {
      background: var(--accent);
      color: #FFFFFF;
      padding: 2px 8px;
      border-radius: 12px;
      font-size: 0.75rem;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.5px;
      color: #0B1D3A;
      margin-bottom: 20px;
    }
    .hero-title span {
      color: var(--accent);
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-sub);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-cta {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .btn-hero-official {
      background: linear-gradient(90deg, #FF5500 0%, #FF8A00 100%);
      color: #FFFFFF;
      font-size: 1.05rem;
      padding: 14px 34px;
      border-radius: 10px;
      box-shadow: 0 6px 20px rgba(255, 85, 0, 0.35);
    }
    .btn-hero-official:hover {
      box-shadow: 0 8px 24px rgba(255, 85, 0, 0.45);
      transform: translateY(-2px);
    }
    .stats-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      padding: 24px;
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .stat-item {
      text-align: center;
      border-right: 1px solid #EDF2F7;
    }
    .stat-item:last-child {
      border-right: none;
    }
    .stat-num {
      font-size: 1.85rem;
      font-weight: 900;
      color: var(--primary);
    }
    .stat-label {
      font-size: 0.88rem;
      color: var(--text-sub);
      margin-top: 4px;
      font-weight: 600;
    }

    /* 通用章节 */
    .section-wrap {
      padding: 72px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-alt {
      background: #F2F6FC;
    }
    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #0E182A;
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-sub);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 关于与平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }
    .about-content h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: #0B1D3A;
    }
    .about-content p {
      font-size: 1rem;
      color: var(--text-sub);
      margin-bottom: 20px;
      line-height: 1.7;
    }
    .model-pills-box {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .model-pills-title {
      font-size: 1rem;
      font-weight: 800;
      margin-bottom: 14px;
      color: var(--primary);
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .tag-pill {
      background: #F0F4FF;
      color: #1A3FB0;
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 0.82rem;
      font-weight: 700;
      border: 1px solid #D5E2FF;
    }
    .tag-pill.hot {
      background: var(--accent-soft);
      color: var(--accent);
      border-color: #FFD4C2;
    }

    /* 服务能力卡片 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      padding: 28px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #B8D0FF;
    }
    .service-card-top {
      margin-bottom: 20px;
    }
    .service-badge {
      display: inline-block;
      background: #E8F0FE;
      color: var(--primary);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.8rem;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0E182A;
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.6;
    }
    .service-features {
      list-style: none;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      margin-top: 14px;
    }
    .service-features li {
      font-size: 0.85rem;
      color: var(--text-main);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .service-features li::before {
      content: "✓";
      color: var(--accent-alt);
      font-weight: 900;
    }

    /* 流程步骤 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-num {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      background: var(--primary);
      color: #FFFFFF;
      border-radius: 50%;
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 16px;
    }
    .step-card h4 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: #0E182A;
    }
    .step-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
    }

    /* 对比评测五星 9.9分 */
    .review-score-banner {
      background: linear-gradient(135deg, #0A192F 0%, #152E52 100%);
      color: #FFFFFF;
      padding: 36px;
      border-radius: var(--radius-lg);
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .review-left {
      max-width: 600px;
    }
    .review-title {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .review-stars {
      color: #FFB800;
      font-size: 1.3rem;
      letter-spacing: 3px;
      margin-bottom: 10px;
    }
    .score-badge-huge {
      background: #FFFFFF;
      color: #0A192F;
      padding: 16px 28px;
      border-radius: var(--radius);
      text-align: center;
      border: 3px solid var(--accent);
    }
    .score-huge-num {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1;
      color: var(--accent);
    }
    .score-huge-text {
      font-size: 0.85rem;
      color: var(--text-sub);
      margin-top: 4px;
      font-weight: 700;
    }
    .table-container {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }
    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .compare-table th {
      background: #F8FAFD;
      color: #0E182A;
      font-weight: 800;
    }
    .compare-table .highlight-col {
      background: #F0F5FF;
      color: var(--primary);
      font-weight: 700;
    }
    .badge-check {
      color: var(--accent-alt);
      font-weight: 800;
    }

    /* 案例展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .case-card {
      background: #FFFFFF;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .case-media {
      width: 100%;
      aspect-ratio: 16/9;
      background: #E2E8F0;
      overflow: hidden;
    }
    .case-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }
    .case-card:hover .case-media img {
      transform: scale(1.03);
    }
    .case-info {
      padding: 24px;
    }
    .case-info h4 {
      font-size: 1.2rem;
      margin-bottom: 8px;
      color: #0E182A;
    }
    .case-info p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 客户评价板块（6条） */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .testimonial-card {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-stars {
      color: #FFB800;
      font-size: 0.95rem;
      margin-bottom: 12px;
    }
    .testimonial-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.65;
      margin-bottom: 16px;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #EDF2F7;
      padding-top: 12px;
    }
    .author-avatar-text {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #E8F0FE;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
    }
    .author-name {
      font-size: 0.92rem;
      font-weight: 700;
      color: #0E182A;
    }
    .author-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* 需求匹配与表单 */
    .form-box-wrapper {
      background: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      max-width: 820px;
      margin: 0 auto;
    }
    .custom-form {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .form-group-full {
      grid-column: 1 / -1;
    }
    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: #0E182A;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.92rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #FDFDFE;
      color: var(--text-main);
      transition: border-color 0.25s;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFFFFF;
    }
    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    /* 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: 10px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      color: #0E182A;
      font-size: 1rem;
      user-select: none;
    }
    .faq-question:hover {
      background: #F8FAFD;
    }
    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.65;
      border-top: 1px solid #F0F4F8;
      padding-top: 14px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }

    /* 资讯与百科 */
    .articles-flex {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }
    .banner-container {
      background: #FFFFFF;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .news-card-box {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      margin-top: 16px;
    }
    .article-links-list li a {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 10px 14px;
      background: #F8FAFD;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      border: 1px solid #EAEFF6;
    }
    .article-links-list li a:hover {
      color: var(--primary);
      background: #EFF5FF;
      border-color: #D3E2FC;
    }

    /* 加盟代理模块 */
    .partner-banner {
      background: linear-gradient(135deg, #FF5500 0%, #FF8A00 100%);
      color: #FFFFFF;
      padding: 48px;
      border-radius: var(--radius-lg);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .partner-left h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 8px;
    }
    .partner-left p {
      font-size: 1rem;
      opacity: 0.95;
      max-width: 600px;
    }

    /* 页脚 */
    .site-footer {
      background: #0E182A;
      color: #9AA8BC;
      padding: 60px 0 30px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1.2fr 1.2fr 1.6fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h5 {
      font-size: 1rem;
      font-weight: 800;
      color: #FFFFFF;
      margin-bottom: 20px;
    }
    .footer-col p {
      font-size: 0.88rem;
      line-height: 1.7;
      margin-bottom: 12px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #9AA8BC;
      font-size: 0.88rem;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-qr-wrap {
      display: flex;
      align-items: center;
      gap: 14px;
      background: rgba(255, 255, 255, 0.05);
      padding: 16px;
      border-radius: 8px;
      border: 1px solid rgba(255, 255, 255, 0.1);
    }
    .footer-qr-img {
      width: 88px;
      height: 88px;
      background: #FFFFFF;
      padding: 4px;
      border-radius: 6px;
    }
    .footer-qr-text {
      font-size: 0.82rem;
      color: #FFFFFF;
      line-height: 1.5;
    }
    .friendly-links-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 20px 0;
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }
    .friendly-links-bar span {
      color: #FFFFFF;
      font-weight: 700;
    }
    .friendly-links-bar a {
      color: #9AA8BC;
      margin-right: 12px;
    }
    .friendly-links-bar a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #6C7A90;
    }

    /* 悬浮小组件 */
    .float-tools {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 46px;
      height: 46px;
      background: #FFFFFF;
      border-radius: 50%;
      box-shadow: 0 4px 14px rgba(0,0,0,0.15);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: var(--primary);
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: all 0.25s ease;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #FFFFFF;
      transform: translateY(-2px);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .cards-grid-3,
      .testimonials-grid,
      .workflow-steps,
      .stats-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .cases-grid,
      .articles-flex,
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }
    @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: 0 8px 20px rgba(0,0,0,0.08);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-toggle {
        display: block;
      }
      .header-actions .btn-outline {
        display: none;
      }
      .cards-grid-3,
      .testimonials-grid,
      .workflow-steps,
      .stats-bar,
      .custom-form {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .partner-banner,
      .review-score-banner {
        flex-direction: column;
        text-align: center;
      }
    }