:root {
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --primary-light: #eef2ff;
      --accent: #f97316;
      --accent-grad: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #f97316 100%);
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(79, 70, 229, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 10%, rgba(79, 70, 229, 0.04), transparent 40%),
                  radial-gradient(circle at 90% 20%, rgba(249, 115, 22, 0.04), transparent 45%),
                  radial-gradient(circle at 50% 80%, rgba(124, 58, 237, 0.03), transparent 50%),
                  #f8fafc;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

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

    .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, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.02);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--text-main);
    }

    .brand-logo img {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: block;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: 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: var(--radius-full);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      line-height: 1.2;
    }

    .btn-primary {
      background: var(--accent-grad);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
      color: #ffffff;
    }

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

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

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle span {
      width: 24px;
      height: 2px;
      background: var(--text-main);
      transition: var(--transition);
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-light);
      border: 1px solid #cbd5e1;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight {
      background: var(--accent-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-btns .btn-lg {
      padding: 14px 34px;
      font-size: 16px;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px 24px;
      box-shadow: var(--shadow-md);
    }

    .stat-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-number {
      font-size: 30px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 通用Section布局 */
    .section-block {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-subtitle {
      font-size: 13px;
      text-transform: uppercase;
      font-weight: 700;
      color: var(--accent);
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
    }

    /* 平台介绍 / 关于我们 */
    .about-card-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .about-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .about-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }

    .about-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .about-card h3 {
      font-size: 18px;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .about-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵与服务能力 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 500;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 一站式制作场景 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .scene-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .scene-card:hover {
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
      transform: translateY(-3px);
    }

    .scene-badge {
      align-self: flex-start;
      font-size: 11px;
      padding: 4px 10px;
      border-radius: 4px;
      background: #f1f5f9;
      color: var(--text-sub);
      font-weight: 600;
      margin-bottom: 14px;
    }

    .scene-card h3 {
      font-size: 17px;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .scene-card p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
      flex: 1;
    }

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

    .flow-step-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);
    }

    .flow-step-num {
      width: 40px;
      height: 40px;
      line-height: 40px;
      border-radius: var(--radius-full);
      background: var(--accent-grad);
      color: #ffffff;
      font-weight: 700;
      margin: 0 auto 16px;
      font-size: 16px;
    }

    .flow-step-card h3 {
      font-size: 16px;
      margin-bottom: 8px;
    }

    .flow-step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 对比评测表格 */
    .compare-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .eval-highlight-box {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #eef2ff 0%, #fff7ed 100%);
      border: 1px solid #c7d2fe;
      border-radius: var(--radius-md);
      padding: 20px 28px;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

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

    .score-big {
      font-size: 42px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
    }

    .stars-text {
      color: #f59e0b;
      font-size: 20px;
      letter-spacing: 2px;
    }

    .table-responsive {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .compare-table th {
      background-color: #f8fafc;
      font-weight: 600;
      color: var(--text-main);
    }

    .compare-table td.brand-col {
      font-weight: 700;
      color: var(--primary);
      background-color: rgba(79, 70, 229, 0.02);
    }

    /* 案例展示区 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .showcase-img-wrap {
      width: 100%;
      aspect-ratio: 16/9;
      background: #f1f5f9;
      overflow: hidden;
    }

    .showcase-img-wrap.square {
      aspect-ratio: 1/1;
    }

    .showcase-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .showcase-card:hover .showcase-img-wrap img {
      transform: scale(1.03);
    }

    .showcase-content {
      padding: 20px;
      flex: 1;
      display: flex;
      flex-direction: column;
    }

    .showcase-content h3 {
      font-size: 16px;
      margin-bottom: 8px;
    }

    .showcase-content p {
      font-size: 13px;
      color: var(--text-muted);
      flex: 1;
    }

    /* 智能需求匹配与表单 */
    .match-form-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .match-info h3 {
      font-size: 22px;
      margin-bottom: 16px;
    }

    .match-info p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }

    .contact-item-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      font-size: 14px;
      color: var(--text-main);
    }

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

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

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

    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background: #f8fafc;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

    /* 用户评论 */
    .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: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-full);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 15px;
    }

    .reviewer-info h4 {
      font-size: 15px;
      color: var(--text-main);
    }

    .reviewer-info span {
      font-size: 12px;
      color: var(--text-sub);
    }

    .review-body {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 600;
      font-size: 15px;
      user-select: none;
    }

    .faq-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.28s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #f8fafc;
      border-top: 1px solid transparent;
    }

    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active {
      border-color: #cbd5e1;
    }

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

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

    /* 文章列表 & 百科 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .article-card h3 {
      font-size: 16px;
      margin-bottom: 10px;
    }

    .article-card p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 16px;
      flex: 1;
    }

    .article-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .article-link:hover {
      text-decoration: underline;
    }

    /* 底部区域 */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 24px;
      margin-top: auto;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1.2fr 1.2fr 1.6fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #f8fafc;
      font-size: 18px;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 13px;
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #f8fafc;
      font-size: 15px;
      margin-bottom: 16px;
      font-weight: 600;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links-list li a {
      font-size: 13px;
      color: #94a3b8;
    }

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

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

    .qrcode-box img {
      width: 110px;
      height: 110px;
      border-radius: var(--radius-sm);
      background: #ffffff;
      padding: 4px;
    }

    .qrcode-box span {
      font-size: 12px;
      color: #94a3b8;
    }

    .footer-friendly-links {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friendly-title {
      font-size: 13px;
      color: #cbd5e1;
      margin-bottom: 10px;
      font-weight: 600;
    }

    .friendly-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friendly-list a {
      font-size: 13px;
      color: #94a3b8;
    }

    .friendly-list a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 12px;
      color: #64748b;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-full);
      background: #ffffff;
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      font-weight: 700;
      font-size: 13px;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .stat-item:nth-child(2) {
        border-right: none;
      }
      .about-card-wrap,
      .scene-grid,
      .showcase-grid,
      .reviews-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .match-form-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: flex;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 10px 0;
        width: 100%;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .stat-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 12px;
      }
      .stat-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
      .about-card-wrap,
      .scene-grid,
      .showcase-grid,
      .reviews-grid,
      .articles-grid,
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .compare-container {
        padding: 20px;
      }
    }