:root {
      --primary-color: #ff3366;
      --secondary-color: #7928ca;
      --accent-color: #0070f3;
      --highlight-color: #ff0080;
      --bg-main: #fafbfc;
      --bg-card: #ffffff;
      --text-main: #111827;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --border-color: #e5e7eb;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 4px 12px rgba(0,0,0,0.04);
      --shadow-md: 0 10px 30px rgba(0,0,0,0.06);
      --shadow-hover: 0 16px 40px rgba(121, 40, 202, 0.12);
      --container-width: 1200px;
      --transition-fast: 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-main);
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      color: var(--text-main);
      background: radial-gradient(circle at 10% 10%, rgba(255, 51, 102, 0.03) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(0, 112, 243, 0.03) 0%, transparent 50%),
                  var(--bg-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      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, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      transition: var(--transition-fast);
    }

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

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

    .brand-logo-wrap .logo-box {
      width: 130px;
      display: flex;
      align-items: center;
    }

    .brand-text {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      display: inline-block;
      padding: 10px 14px;
      color: var(--text-main);
      font-size: 0.92rem;
      font-weight: 600;
      text-decoration: none;
      transition: color var(--transition-fast);
      position: relative;
    }

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

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: 4px;
      left: 14px;
      right: 14px;
      height: 2px;
      background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
      transform: scaleX(0);
      transition: transform var(--transition-fast);
    }

    .nav-links a:hover::after {
      transform: scaleX(1);
    }

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

    .btn-nav-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      border-radius: 999px;
      font-size: 0.9rem;
      font-weight: 700;
      text-decoration: none;
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
      cursor: pointer;
    }

    .btn-gradient {
      background: linear-gradient(135deg, #ff0080, #7928ca);
      color: #ffffff !important;
      box-shadow: 0 4px 15px rgba(255, 0, 128, 0.25);
      border: none;
    }

    .btn-gradient:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 0, 128, 0.35);
    }

    .btn-outline {
      border: 1px solid #d1d5db;
      background: #ffffff;
      color: var(--text-main);
    }

    .btn-outline:hover {
      border-color: var(--secondary-color);
      color: var(--secondary-color);
    }

    .nav-toggle-btn {
      display: none;
      flex-direction: column;
      justify-content: space-around;
      width: 28px;
      height: 24px;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 0;
    }

    .nav-toggle-btn span {
      width: 100%;
      height: 3px;
      background: var(--text-main);
      border-radius: 3px;
      transition: all 0.3s ease;
    }

    /* 首屏 Hero（无图片纯 CSS 潮流艳色设计） */
    .hero-section {
      position: relative;
      padding: 70px 0 60px;
      background: linear-gradient(180deg, rgba(255, 51, 102, 0.04) 0%, rgba(121, 40, 202, 0.04) 100%);
      border-bottom: 1px solid rgba(229, 231, 235, 0.8);
      overflow: hidden;
    }

    .hero-container {
      text-align: center;
      position: relative;
      z-index: 2;
    }

    .badge-capsule {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      border-radius: 999px;
      background: #ffffff;
      border: 1px solid rgba(255, 0, 128, 0.2);
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-color);
      margin-bottom: 24px;
      box-shadow: 0 4px 14px rgba(255, 51, 102, 0.08);
    }

    .hero-title {
      font-size: clamp(2rem, 4.2vw, 3.2rem);
      font-weight: 900;
      line-height: 1.25;
      color: #111827;
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .hero-title .text-vibrant {
      background: linear-gradient(90deg, #ff0080, #7928ca 50%, #0070f3);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .hero-cta-group .btn-main-hero {
      padding: 14px 34px;
      font-size: 1.05rem;
    }

    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 980px;
      margin: 0 auto;
    }

    .stat-badge-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px 16px;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    }

    .stat-badge-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(121, 40, 202, 0.3);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 公共模块版面规范 */
    .section-block {
      padding: 85px 0;
      position: relative;
    }

    .section-block-alt {
      background-color: #ffffff;
      border-top: 1px solid #f3f4f6;
      border-bottom: 1px solid #f3f4f6;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-eyebrow {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1.5px;
      color: var(--secondary-color);
      margin-bottom: 10px;
      background: rgba(121, 40, 202, 0.08);
      padding: 4px 12px;
      border-radius: 999px;
    }

    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.02em;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 平台聚合大模型芯片滚动区 */
    .models-marquee-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 40px;
      box-shadow: var(--shadow-sm);
    }

    .model-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-chip {
      background: #f9fafb;
      border: 1px solid #e5e7eb;
      padding: 8px 16px;
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      transition: all var(--transition-fast);
    }

    .model-chip:hover {
      background: linear-gradient(135deg, rgba(255,51,102,0.1), rgba(121,40,202,0.1));
      border-color: var(--primary-color);
      color: var(--primary-color);
      transform: translateY(-2px);
    }

    /* 核心场景卡片网格 */
    .features-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
      transition: transform var(--transition-fast), box-shadow var(--transition-fast), border-color var(--transition-fast);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(255, 0, 128, 0.4);
    }

    .feature-icon-bar {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.25rem;
      margin-bottom: 18px;
      background: linear-gradient(135deg, rgba(255,51,102,0.15), rgba(121,40,202,0.15));
      color: var(--primary-color);
    }

    .feature-card h3 {
      font-size: 1.22rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .feature-tag-mini {
      margin-top: 18px;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--secondary-color);
      display: inline-block;
    }

    /* 图文混排区 */
    .showcase-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
      margin-bottom: 50px;
    }

    .showcase-visual {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      background: #fff;
    }

    .showcase-visual img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .showcase-visual:hover img {
      transform: scale(1.02);
    }

    .showcase-content h3 {
      font-size: 1.8rem;
      font-weight: 800;
      margin-bottom: 16px;
      line-height: 1.35;
      color: var(--text-main);
    }

    .showcase-content p {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .checklist-items {
      list-style: none;
      margin-bottom: 24px;
    }

    .checklist-items li {
      position: relative;
      padding-left: 26px;
      margin-bottom: 10px;
      font-size: 0.96rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .checklist-items li::before {
      content: '✓';
      position: absolute;
      left: 0;
      color: var(--primary-color);
      font-weight: 900;
      font-size: 1.1rem;
    }

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

    .step-item-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-num-pill {
      width: 44px;
      height: 44px;
      margin: 0 auto 16px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      box-shadow: 0 4px 12px rgba(255, 51, 102, 0.3);
    }

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

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

    /* 对比评测表格与卡片 */
    .compare-section-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .score-banner-box {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, rgba(255, 0, 128, 0.06), rgba(121, 40, 202, 0.08));
      border: 1px solid rgba(255, 0, 128, 0.2);
      border-radius: var(--radius-md);
      padding: 24px 30px;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

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

    .score-big {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1;
    }

    .stars-render {
      color: #ffaa00;
      font-size: 1.3rem;
      letter-spacing: 2px;
      margin-bottom: 4px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.94rem;
    }

    .compare-table th {
      background: #f9fafb;
      font-weight: 800;
      color: var(--text-main);
    }

    .compare-table td.brand-highlight {
      background: rgba(255, 51, 102, 0.03);
      color: var(--primary-color);
      font-weight: 700;
    }

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

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform var(--transition-fast);
    }

    .review-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .review-body {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f3f4f6;
      padding-top: 16px;
    }

    .avatar-initial {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .reviewer-meta h5 {
      font-size: 0.96rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-meta span {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    /* FAQ 手风琴面板 */
    .faq-accordion-group {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .faq-item-box {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      background: #ffffff;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: border-color var(--transition-fast);
    }

    .faq-item-box:hover {
      border-color: rgba(121, 40, 202, 0.4);
    }

    .faq-header {
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.02rem;
      color: var(--text-main);
      user-select: none;
    }

    .faq-icon-arrow {
      font-size: 0.85rem;
      transition: transform 0.3s ease;
      color: var(--primary-color);
    }

    .faq-body-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item-box.active .faq-body-content {
      padding: 0 24px 20px 24px;
      max-height: 220px;
    }

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

    /* 需求匹配表单 */
    .form-box-wrapper {
      max-width: 760px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .form-full-span {
      grid-column: 1 / -1;
    }

    .form-control-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d1d5db;
      border-radius: var(--radius-sm);
      font-size: 0.94rem;
      outline: none;
      background: #fafafa;
      transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-color);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(255, 51, 102, 0.15);
    }

    .form-textarea {
      resize: vertical;
      min-height: 110px;
    }

    /* 文章及知识库 */
    .articles-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .article-chips-row {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .article-chip-link {
      display: inline-block;
      padding: 8px 16px;
      background: #f3f4f6;
      border-radius: 6px;
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.88rem;
      font-weight: 600;
      transition: all var(--transition-fast);
    }

    .article-chip-link:hover {
      background: var(--secondary-color);
      color: #ffffff;
    }

    /* 宣传图画廊组件 */
    .banner-gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .gallery-item {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      background: #fff;
    }

    .gallery-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .gallery-item:hover img {
      transform: scale(1.04);
    }

    /* 网站页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-main);
    }

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

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 800;
      margin-bottom: 18px;
      color: var(--text-main);
    }

    .footer-contact-item {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .footer-qr-card {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }

    .footer-qr-box {
      width: 110px;
      height: 110px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      padding: 4px;
      background: #fff;
    }

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

    .friendly-links-container {
      border-top: 1px solid #f3f4f6;
      padding: 24px 0;
      margin-bottom: 24px;
    }

    .friendly-title {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .friendly-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .friendly-links-row a {
      color: var(--text-light);
      text-decoration: none;
      font-size: 0.85rem;
      transition: color var(--transition-fast);
    }

    .friendly-links-row a:hover {
      color: var(--primary-color);
    }

    .footer-bottom-bar {
      border-top: 1px solid #f3f4f6;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: var(--text-light);
      flex-wrap: wrap;
      gap: 12px;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      font-weight: 800;
      font-size: 0.95rem;
      cursor: pointer;
      text-decoration: none;
      transition: transform var(--transition-fast), background var(--transition-fast);
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: #fff0f5;
    }

    /* 响应式适配 */
    @media (max-width: 1024px) {
      .features-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .workflow-steps-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-row {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-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 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }

      .nav-links.mobile-open {
        display: flex;
      }

      .nav-toggle-btn {
        display: flex;
      }

      .header-actions {
        display: none;
      }

      .features-grid {
        grid-template-columns: 1fr;
      }

      .showcase-layout {
        grid-template-columns: 1fr;
      }

      .workflow-steps-row {
        grid-template-columns: 1fr;
      }

      .reviews-grid {
        grid-template-columns: 1fr;
      }

      .hero-stats-row {
        grid-template-columns: 1fr;
      }

      .contact-form-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .banner-gallery-grid {
        grid-template-columns: 1fr;
      }
    }