:root {
      --primary: #123597;
      --secondary: #FF4D00;
      --accent-cyan: #00E5FF;
      --accent-yellow: #FFE600;
      --bg-light: #F4F6FB;
      --bg-card: #FFFFFF;
      --text-main: #141824;
      --text-muted: #5E667A;
      --border-color: #E1E6F0;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 12px rgba(18, 53, 151, 0.06);
      --shadow-hover: 0 16px 32px rgba(18, 53, 151, 0.14);
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 2px solid var(--text-main);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

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

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

    .brand-title {
      font-size: 1.35rem;
      font-weight: 900;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .brand-badge {
      background: var(--secondary);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
      text-transform: uppercase;
    }

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

    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.95rem;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
    }

    .nav-links li a:hover {
      color: var(--secondary);
      background: rgba(255, 77, 0, 0.08);
    }

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

    .btn-contrast-sm {
      background: var(--primary);
      color: #FFFFFF;
      font-weight: 700;
      font-size: 0.9rem;
      padding: 9px 18px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      border: 2px solid var(--primary);
      transition: var(--transition);
      display: inline-block;
    }

    .btn-contrast-sm:hover {
      background: #0B246B;
      border-color: #0B246B;
      color: #FFFFFF;
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: 2px solid var(--text-main);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      font-size: 1.2rem;
      font-weight: bold;
      cursor: pointer;
    }

    /* 撞色首屏 Hero (纯CSS几何撞色，无图片) */
    .hero-section {
      position: relative;
      background: linear-gradient(135deg, #123597 0%, #0A2268 100%);
      color: #FFFFFF;
      padding: 90px 0 80px;
      border-bottom: 6px solid var(--secondary);
      overflow: hidden;
    }

    .hero-shape-1 {
      position: absolute;
      top: -40px;
      right: -40px;
      width: 280px;
      height: 280px;
      background: var(--secondary);
      border-radius: 50%;
      opacity: 0.85;
    }

    .hero-shape-2 {
      position: absolute;
      bottom: -60px;
      left: 10%;
      width: 200px;
      height: 200px;
      background: var(--accent-cyan);
      transform: rotate(45deg);
      opacity: 0.25;
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 900px;
    }

    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent-yellow);
      color: var(--text-main);
      font-weight: 800;
      font-size: 0.9rem;
      padding: 6px 16px;
      border-radius: 30px;
      margin-bottom: 24px;
      box-shadow: 0 4px 0 var(--text-main);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
      color: #FFFFFF;
    }

    .hero-title span {
      color: var(--accent-cyan);
      text-decoration: underline wavy var(--secondary);
    }

    .hero-desc {
      font-size: 1.2rem;
      color: #E1E6F0;
      margin-bottom: 36px;
      max-width: 760px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 48px;
    }

    .btn-main-cta {
      background: var(--secondary);
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 800;
      padding: 16px 36px;
      border-radius: var(--radius-md);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 3px solid #FFFFFF;
      box-shadow: 4px 4px 0px #000;
      transition: var(--transition);
    }

    .btn-main-cta:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px #000;
      background: #E04400;
      color: #FFFFFF;
    }

    .btn-sub-cta {
      background: #FFFFFF;
      color: var(--primary);
      font-size: 1.1rem;
      font-weight: 800;
      padding: 16px 32px;
      border-radius: var(--radius-md);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      border: 3px solid var(--text-main);
      box-shadow: 4px 4px 0px var(--accent-cyan);
      transition: var(--transition);
    }

    .btn-sub-cta:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--accent-cyan);
      background: #F8FAFC;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: rgba(255, 255, 255, 0.1);
      border: 2px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      backdrop-filter: blur(8px);
    }

    .metric-item h4 {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--accent-yellow);
      margin-bottom: 4px;
    }

    .metric-item p {
      font-size: 0.85rem;
      color: #D1D8E8;
      font-weight: 600;
    }

    /* 通用Section */
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

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

    .section-tag {
      display: inline-block;
      background: var(--text-main);
      color: var(--accent-cyan);
      font-size: 0.8rem;
      font-weight: 800;
      padding: 4px 14px;
      border-radius: 4px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* 平台支持模型标签墙 */
    .models-marquee {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      background: #FFFFFF;
      border: 2px solid var(--text-main);
      color: var(--text-main);
      font-weight: 700;
      font-size: 0.9rem;
      padding: 8px 18px;
      border-radius: 30px;
      box-shadow: 3px 3px 0 var(--border-color);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--accent-yellow);
      transform: translateY(-2px);
      box-shadow: 3px 3px 0 var(--text-main);
    }

    /* 服务能力卡片 (撞色风) */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border: 2px solid var(--text-main);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: 6px 6px 0px var(--text-main);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translate(-3px, -3px);
      box-shadow: 9px 9px 0px var(--primary);
    }

    .service-card-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .service-badge {
      background: var(--secondary);
      color: #fff;
      font-size: 0.8rem;
      font-weight: 800;
      padding: 4px 8px;
      border-radius: 4px;
    }

    .service-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .service-features {
      list-style: none;
      margin-bottom: 20px;
    }

    .service-features li {
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .service-features li::before {
      content: "■";
      color: var(--secondary);
      font-size: 0.7rem;
    }

    /* 对比评测高亮专区 */
    .eval-highlight-box {
      background: #FFFFFF;
      border: 3px solid var(--text-main);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: 10px 10px 0px var(--primary);
      margin-bottom: 40px;
    }

    .eval-score-banner {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 20px;
      background: #FFF7ED;
      border: 2px dashed var(--secondary);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 30px;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-num {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--secondary);
      line-height: 1;
    }

    .score-meta h4 {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .score-meta p {
      font-size: 0.95rem;
      color: #6B7280;
    }

    .eval-table-wrap {
      overflow-x: auto;
    }

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

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .eval-table th {
      background: var(--bg-light);
      font-weight: 800;
      color: var(--text-main);
    }

    .eval-table tr:hover {
      background: rgba(18, 53, 151, 0.02);
    }

    .eval-table .highlight-col {
      background: #F0F4FF;
      font-weight: 700;
      color: var(--primary);
    }

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

    .step-card {
      background: #FFFFFF;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-md);
      padding: 30px 20px;
      position: relative;
      box-shadow: 4px 4px 0px var(--text-main);
    }

    .step-idx {
      position: absolute;
      top: -16px;
      left: 20px;
      background: var(--accent-yellow);
      color: var(--text-main);
      border: 2px solid var(--text-main);
      font-size: 1rem;
      font-weight: 900;
      padding: 2px 10px;
      border-radius: 20px;
    }

    .step-card h3 {
      font-size: 1.15rem;
      font-weight: 800;
      margin: 10px 0 8px;
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 案例展示画廊 */
    .gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-bottom: 24px;
    }

    .gallery-item {
      background: #FFFFFF;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 6px 6px 0 var(--text-main);
    }

    .gallery-img-wrap {
      width: 100%;
      background: #E1E6F0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .gallery-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .gallery-caption {
      padding: 16px 20px;
    }

    .gallery-caption h4 {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .gallery-caption p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

    .review-card {
      background: #FFFFFF;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: 4px 4px 0 var(--text-main);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar-placeholder {
      width: 44px;
      height: 44px;
      background: var(--primary);
      color: #FFFFFF;
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 2px solid var(--text-main);
    }

    .review-user-info h4 {
      font-size: 1rem;
      font-weight: 800;
    }

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

    .review-text {
      font-size: 0.92rem;
      color: #374151;
      line-height: 1.6;
    }

    /* FAQ 手风琴 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #FFFFFF;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-md);
      margin-bottom: 14px;
      box-shadow: 4px 4px 0 var(--text-main);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 800;
      font-size: 1.05rem;
      background: #FFFFFF;
      user-select: none;
    }

    .faq-question:hover {
      background: #FAFBFD;
    }

    .faq-icon {
      font-size: 1.3rem;
      font-weight: 900;
      transition: var(--transition);
      color: var(--secondary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #FDFEFE;
      border-top: 1px solid var(--border-color);
    }

    .faq-answer-inner {
      padding: 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    /* 表单与转化区 */
    .form-section-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #FFFFFF;
      border: 3px solid var(--text-main);
      border-radius: var(--radius-lg);
      padding: 48px;
      box-shadow: 8px 8px 0 var(--text-main);
    }

    .form-info-side h3 {
      font-size: 1.8rem;
      font-weight: 900;
      margin-bottom: 16px;
      color: var(--primary);
    }

    .form-info-side p {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 28px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-weight: 700;
      color: var(--text-main);
    }

    .contact-badge {
      background: var(--accent-cyan);
      border: 2px solid var(--text-main);
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.8rem;
    }

    .qr-side {
      margin-top: 24px;
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 16px;
      background: var(--bg-light);
      border: 2px solid var(--border-color);
      border-radius: var(--radius-md);
    }

    .qr-img-box {
      width: 90px;
      height: 90px;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-sm);
      overflow: hidden;
      flex-shrink: 0;
    }

    .qr-img-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

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

    .form-group label {
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .form-control {
      padding: 12px 16px;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      background: #FFFFFF;
      transition: var(--transition);
    }

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

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

    .btn-submit {
      background: var(--secondary);
      color: #FFFFFF;
      font-weight: 800;
      font-size: 1.05rem;
      padding: 14px 28px;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 4px 4px 0 var(--text-main);
      transition: var(--transition);
      margin-top: 8px;
    }

    .btn-submit:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0 var(--text-main);
    }

    /* 资讯与友情链接 */
    .articles-box {
      background: #FFFFFF;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: 4px 4px 0 var(--border-color);
      margin-bottom: 40px;
    }

    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      background: var(--bg-light);
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.9rem;
      font-weight: 600;
      transition: var(--transition);
    }

    .article-link-item:hover {
      background: var(--text-main);
      color: #FFFFFF;
    }

    /* 页脚 */
    .site-footer {
      background: #0B193D;
      color: #E1E6F0;
      border-top: 6px solid var(--secondary);
      padding: 60px 0 30px;
    }

    .footer-main-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 20px;
      border-left: 4px solid var(--secondary);
      padding-left: 10px;
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.7;
      color: #B8C2D8;
    }

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

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a, .ai-page-home-link {
      color: #B8C2D8;
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-links a:hover, .ai-page-home-link:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      font-size: 0.85rem;
      color: #8D9BB8;
    }

    .friend-links-bar {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-top: 12px;
    }

    .friend-links-bar a {
      color: #A0AEC0;
      text-decoration: none;
      font-size: 0.85rem;
      transition: var(--transition);
    }

    .friend-links-bar a:hover {
      color: var(--accent-yellow);
    }

    /* 悬浮客服条 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      background: var(--secondary);
      color: #FFFFFF;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      font-size: 1.2rem;
      box-shadow: 0 4px 12px rgba(0,0,0,0.25);
      border: 2px solid #FFFFFF;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: #E04400;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .flow-steps { grid-template-columns: repeat(2, 1fr); }
      .gallery-grid { grid-template-columns: 1fr; }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .form-section-inner { grid-template-columns: 1fr; }
      .footer-main-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        border-bottom: 2px solid var(--text-main);
      }
      .nav-links.active { display: flex; }
      .mobile-toggle { display: block; }
      .hero-title { font-size: 1.8rem; }
      .reviews-grid { grid-template-columns: 1fr; }
      .flow-steps { grid-template-columns: 1fr; }
      .footer-main-grid { grid-template-columns: 1fr; }
      .hero-metrics { grid-template-columns: 1fr; }
    }