:root {
      --primary-gradient: linear-gradient(135deg, #ff416c 0%, #ff4b2b 25%, #ffb300 50%, #00b09b 75%, #96c93d 100%);
      --rainbow-accent: linear-gradient(90deg, #ff007a, #7928ca, #0070f3, #00dfd8, #7928ca, #ff007a);
      --bg-light: #fbfcfe;
      --bg-surface: #ffffff;
      --bg-card: rgba(255, 255, 255, 0.96);
      --bg-card-alt: #f4f7fb;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-heading: #0f172a;
      --border-color: #e2e8f0;
      --border-rainbow: linear-gradient(to right, #ff4b2b, #ff416c, #8a2387, #e94057, #f27121);
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --radius-full: 9999px;
      --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 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, "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;
      background-image: 
        radial-gradient(at 0% 0%, rgba(255, 65, 108, 0.04) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(0, 112, 243, 0.04) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(0, 223, 216, 0.03) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(255, 179, 0, 0.04) 0px, transparent 50%);
      background-attachment: fixed;
    }

    /* 容器规范贯穿全页 */
    .site-container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

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

    /* 顶栏导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px rgba(0,0,0,0.02);
    }

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 48px;
    }

    .brand-logo-wrap img.ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
      display: block;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: #334155;
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover {
      color: #ff416c;
      background: rgba(255, 65, 108, 0.05);
    }

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

    .btn-portal-rainbow {
      background: linear-gradient(135deg, #ff416c, #8a2387, #0070f3);
      color: #ffffff !important;
      padding: 10px 22px;
      border-radius: var(--radius-full);
      font-size: 0.95rem;
      font-weight: 600;
      box-shadow: 0 4px 15px rgba(255, 65, 108, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .btn-portal-rainbow:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(121, 40, 202, 0.4);
    }

    .nav-toggle-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 1.25rem;
    }

    /* 移动端折叠菜单 */
    .mobile-menu-drawer {
      display: none;
      background: var(--bg-surface);
      border-bottom: 1px solid var(--border-color);
      padding: 16px 24px;
    }

    .mobile-menu-drawer.open {
      display: block;
    }

    .mobile-menu-drawer ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .mobile-menu-drawer a {
      font-size: 1rem;
      color: var(--text-main);
      display: block;
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    /* 首屏 Hero 区（严禁图片） */
    .hero-section {
      padding: 60px 0 70px 0;
      position: relative;
      overflow: hidden;
    }

    .hero-container-card {
      background: linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(248, 250, 252, 0.9));
      border: 1px solid rgba(226, 232, 240, 0.8);
      border-radius: var(--radius-lg);
      padding: 60px 48px;
      box-shadow: var(--shadow-lg);
      position: relative;
      text-align: center;
    }

    .hero-rainbow-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: linear-gradient(90deg, rgba(255, 65, 108, 0.1), rgba(0, 112, 243, 0.1));
      border: 1px solid rgba(255, 65, 108, 0.2);
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 600;
      color: #ff416c;
      margin-bottom: 24px;
    }

    .hero-rainbow-pill .pulse-dot {
      width: 8px;
      height: 8px;
      background: #ff416c;
      border-radius: 50%;
      box-shadow: 0 0 8px #ff416c;
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-heading);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .btn-main-action {
      background: linear-gradient(135deg, #ff416c 0%, #ff4b2b 50%, #f27121 100%);
      color: #ffffff;
      font-size: 1.12rem;
      font-weight: 700;
      padding: 16px 36px;
      border-radius: var(--radius-full);
      box-shadow: 0 10px 25px rgba(255, 75, 43, 0.35);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(255, 75, 43, 0.45);
    }

    .btn-sub-action {
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      font-size: 1.05rem;
      font-weight: 600;
      padding: 15px 32px;
      border-radius: var(--radius-full);
      box-shadow: var(--shadow-sm);
    }

    .btn-sub-action:hover {
      border-color: #0070f3;
      color: #0070f3;
      background: #f8fafc;
    }

    /* 纯CSS数据面板指标 */
    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      border-top: 1px dashed var(--border-color);
      padding-top: 36px;
    }

    .metric-card-item {
      padding: 16px;
      background: rgba(255, 255, 255, 0.7);
      border-radius: var(--radius-md);
      border: 1px solid rgba(226, 232, 240, 0.6);
    }

    .metric-num {
      font-size: 1.9rem;
      font-weight: 800;
      background: linear-gradient(135deg, #0070f3, #7928ca);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Section 通用规范 */
    .content-section {
      padding: 70px 0;
      position: relative;
    }

    .section-header-block {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      background: rgba(0, 112, 243, 0.08);
      color: #0070f3;
      margin-bottom: 12px;
    }

    .section-header-block h2 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-heading);
      margin-bottom: 14px;
    }

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

    /* 平台介绍模块 */
    .about-card-wrap {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 48px;
      box-shadow: var(--shadow-md);
      position: relative;
      overflow: hidden;
    }

    .about-card-wrap::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: var(--primary-gradient);
    }

    .about-grid-content {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text-col h3 {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 18px;
    }

    .about-text-col p {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.8;
    }

    .about-badges-flow {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 24px;
    }

    .model-chip {
      background: var(--bg-card-alt);
      border: 1px solid #cbd5e1;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 600;
      color: #334155;
    }

    .about-visual-col {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .media-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .media-box img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    /* 服务能力卡片网格 */
    .services-grid-block {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition-smooth);
      position: relative;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: #ff416c;
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(255, 65, 108, 0.1), rgba(0, 112, 243, 0.1));
      color: #ff416c;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 12px;
    }

    .service-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 对比评测模块 */
    .review-summary-banner {
      background: linear-gradient(135deg, #1e293b, #0f172a);
      border-radius: var(--radius-lg);
      color: #ffffff;
      padding: 36px 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 32px;
      box-shadow: var(--shadow-md);
    }

    .review-score-part {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-badge {
      font-size: 3.2rem;
      font-weight: 900;
      line-height: 1;
      color: #ffb300;
      text-shadow: 0 4px 12px rgba(255, 179, 0, 0.3);
    }

    .score-desc-title {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .score-desc-sub {
      color: #94a3b8;
      font-size: 0.95rem;
    }

    .table-container-card {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .comparison-table th, .comparison-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

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

    .comparison-table tr:hover td {
      background: #fdfdfe;
    }

    .highlight-col {
      background: rgba(255, 65, 108, 0.02);
      font-weight: 600;
      color: #ff416c;
    }

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

    .step-item-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-badge-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ff416c, #0070f3);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
      font-size: 0.9rem;
    }

    .step-item-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 8px;
    }

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

    /* 案例展示 */
    .case-gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

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

    .case-image-holder {
      width: 100%;
      background: #0f172a;
    }

    .case-image-holder img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    .case-content-box {
      padding: 24px;
    }

    .case-content-box h3 {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 10px;
    }

    .case-content-box p {
      font-size: 0.95rem;
      color: var(--text-muted);
    }

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

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

    .testimonial-quote {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.7;
    }

    .client-meta-box {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }

    .client-avatar-letter {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0070f3, #00dfd8);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
    }

    .client-title-role {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .client-name-bold {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-heading);
    }

    /* FAQ 手风琴 */
    .faq-accordion-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .faq-toggle-header {
      padding: 20px 24px;
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-heading);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .faq-toggle-header:hover {
      background: #f8fafc;
    }

    .faq-icon-arrow {
      font-size: 1.2rem;
      transition: transform 0.3s;
      color: #0070f3;
    }

    .faq-item.active .faq-icon-arrow {
      transform: rotate(180deg);
    }

    .faq-answer-content {
      padding: 0 24px 20px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

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

    /* 表单与需求匹配区 */
    .form-contact-wrap {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 48px;
      box-shadow: var(--shadow-md);
    }

    .form-input-group {
      margin-bottom: 20px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-heading);
      margin-bottom: 8px;
    }

    .form-control-input, .form-control-select, .form-control-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: var(--transition-smooth);
      background: #fdfdfe;
    }

    .form-control-input:focus, .form-control-select:focus, .form-control-textarea:focus {
      border-color: #0070f3;
      box-shadow: 0 0 0 3px rgba(0, 112, 243, 0.1);
    }

    .btn-form-submit {
      width: 100%;
      padding: 15px;
      background: linear-gradient(135deg, #0070f3, #7928ca);
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 1.05rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(0, 112, 243, 0.3);
      transition: var(--transition-smooth);
    }

    .btn-form-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 112, 243, 0.4);
    }

    .contact-info-cards {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .contact-card-sub {
      background: #f8fafc;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
    }

    .contact-card-sub h4 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 12px;
    }

    .contact-meta-list {
      list-style: none;
      font-size: 0.95rem;
      color: var(--text-main);
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .qr-box-container {
      display: flex;
      align-items: center;
      gap: 20px;
      margin-top: 14px;
    }

    .qr-box-container img {
      width: 110px;
      height: 110px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      display: block;
      object-fit: contain;
    }

    /* 资讯与动态区 */
    .news-section-box {
      background: #f8fafc;
      border-radius: var(--radius-lg);
      padding: 36px;
      border: 1px solid var(--border-color);
    }

    .news-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .news-link-btn {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      color: var(--text-main);
      display: block;
      box-shadow: var(--shadow-sm);
    }

    .news-link-btn:hover {
      border-color: #ff416c;
      color: #ff416c;
    }

    /* 友情链接与生态 */
    .partner-links-wrap {
      padding: 30px 0;
      border-top: 1px solid var(--border-color);
    }

    .partner-links-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-heading);
      margin-bottom: 16px;
    }

    .links-tags-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .links-tags-flex a {
      font-size: 0.9rem;
      color: var(--text-muted);
      background: #ffffff;
      padding: 6px 14px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .links-tags-flex a:hover {
      color: #0070f3;
      border-color: #0070f3;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 30px 0;
      color: var(--text-muted);
    }

    .footer-content-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-brand-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-heading);
    }

    .footer-copy-text {
      font-size: 0.88rem;
    }

    /* 悬浮工具栏 */
    .floating-action-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-circle-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: #ff416c;
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      border: 1px solid var(--border-color);
      transition: var(--transition-smooth);
    }

    .float-circle-btn:hover {
      transform: scale(1.08);
      background: #ff416c;
      color: #ffffff;
    }

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .services-grid-block, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-title {
        font-size: 2.3rem;
      }
      .about-grid-content, .form-contact-wrap {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu, .nav-actions {
        display: none;
      }
      .nav-toggle-btn {
        display: block;
      }
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid-block, .testimonials-grid, .case-gallery-grid, .flow-steps-grid {
        grid-template-columns: 1fr;
      }
      .hero-container-card {
        padding: 36px 20px;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .review-summary-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
        padding: 24px;
      }
      .about-card-wrap, .form-contact-wrap {
        padding: 24px;
      }
    }