:root {
      --primary: #0052d9;
      --primary-hover: #003cab;
      --primary-light: #e8f3ff;
      --accent: #00b42a;
      --accent-warm: #ff7d00;
      --text-main: #1d2129;
      --text-sub: #4e5969;
      --text-muted: #86909c;
      --bg-page: #f7f9fc;
      --bg-card: #ffffff;
      --border-color: #e5e6eb;
      --border-focus: #165dff;
      --shadow-sm: 0 2px 6px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(0, 82, 217, 0.08);
      --shadow-lg: 0 16px 36px rgba(0, 0, 0, 0.08);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --transition: all 0.25s 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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      max-width: 160px;
    }

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

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

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

    .nav-links li a:hover {
      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 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-md);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      line-height: 1.2;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(0, 82, 217, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      color: #ffffff;
      transform: translateY(-1px);
    }

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

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

    .btn-sm {
      padding: 6px 14px;
      font-size: 13px;
    }

    .btn-lg {
      padding: 14px 30px;
      font-size: 16px;
      border-radius: 30px;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, #e0edff 0%, #f0f5fc 40%, #ffffff 100%);
      padding: 80px 0 60px;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background-color: var(--primary-light);
      border: 1px solid rgba(0, 82, 217, 0.15);
      border-radius: 20px;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 40px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-sub);
      line-height: 1.7;
      margin-bottom: 34px;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .model-tags-wrapper {
      margin-top: 30px;
      padding-top: 24px;
      border-top: 1px dashed var(--border-color);
    }

    .model-tags-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }

    .tag-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      color: var(--text-sub);
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 12px;
      transition: var(--transition);
    }

    .tag-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 通用区块与标题 */
    .section-block {
      padding: 70px 0;
      position: relative;
    }

    .section-block:nth-child(even) {
      background-color: #ffffff;
    }

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

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

    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }

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

    /* 网格布局通用 */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

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

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(0, 82, 217, 0.3);
    }

    .card-icon {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 平台指标卡片 */
    .stats-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

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

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    /* 一站式制作场景 */
    .feature-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .feature-tag {
      font-size: 11px;
      font-weight: 600;
      padding: 2px 8px;
      background: #f2f3f5;
      color: var(--text-sub);
      border-radius: 4px;
      align-self: flex-start;
      margin-bottom: 12px;
    }

    .feature-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .feature-desc {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      position: relative;
    }

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

    .step-num {
      font-size: 24px;
      font-weight: 800;
      color: var(--primary);
      opacity: 0.3;
      margin-bottom: 8px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 评测与对比表格 */
    .review-highlight {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
    }

    .review-score-box {
      text-align: center;
      min-width: 180px;
      padding-right: 24px;
      border-right: 1px solid var(--border-color);
    }

    .review-score {
      font-size: 46px;
      font-weight: 900;
      color: var(--accent-warm);
      line-height: 1;
      margin-bottom: 4px;
    }

    .review-stars {
      color: var(--accent-warm);
      font-size: 16px;
      margin-bottom: 4px;
    }

    .review-label {
      font-size: 12px;
      color: var(--text-muted);
    }

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

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

    .custom-table th, .custom-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }

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

    .custom-table tr:last-child td {
      border-bottom: none;
    }

    .custom-table .hl-col {
      background: rgba(0, 82, 217, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 案例展示 */
    .case-banner-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 24px;
    }

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

    .case-banner-item img {
      width: 100%;
      height: 180px;
      object-fit: cover;
    }

    .case-banner-desc {
      padding: 14px;
      font-size: 13px;
      font-weight: 500;
      color: var(--text-main);
    }

    .media-dual-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      margin-top: 20px;
    }

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

    .media-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
    }

    .media-info {
      padding: 14px;
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .testi-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
    }

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

    .testi-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .testi-name {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
    }

    .testi-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    .testi-text {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

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

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 18px;
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fafbfc;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 20px;
      border-top: 1px solid var(--border-color);
    }

    /* 文章与资讯 */
    .articles-block {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

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

    .article-pill {
      font-size: 13px;
      padding: 6px 12px;
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      color: var(--text-sub);
    }

    .article-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    /* 表单与联系 */
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: start;
    }

    .contact-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
    }

    .contact-info-list {
      list-style: none;
      margin-top: 20px;
    }

    .contact-info-list li {
      margin-bottom: 12px;
      font-size: 14px;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .contact-info-list strong {
      color: var(--text-main);
    }

    .qr-box {
      margin-top: 20px;
      padding: 16px;
      background: var(--bg-page);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-img {
      width: 90px;
      height: 90px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(22, 93, 255, 0.12);
    }

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

    /* 友情链接与页脚 */
    .site-footer {
      background: #111827;
      color: #9ca3af;
      padding: 50px 0 24px;
      border-top: 1px solid #1f2937;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 18px;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 13px;
      line-height: 1.6;
      max-width: 400px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 14px;
      margin-bottom: 12px;
    }

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

    .footer-links li {
      margin-bottom: 8px;
      font-size: 13px;
    }

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

    .friend-links-area {
      padding-top: 20px;
      margin-top: 20px;
      border-top: 1px solid #1f2937;
      font-size: 13px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-top: 8px;
    }

    .friend-links-list a {
      color: #9ca3af;
    }

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

    .footer-bottom {
      margin-top: 24px;
      text-align: center;
      font-size: 12px;
      color: #6b7280;
    }

    /* 悬浮客服 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--primary);
      position: relative;
    }

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

    .float-btn .qr-hover-pop {
      display: none;
      position: absolute;
      right: 54px;
      bottom: 0;
      background: #ffffff;
      padding: 10px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
      font-size: 11px;
      color: var(--text-main);
    }

    .float-btn:hover .qr-hover-pop {
      display: block;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .grid-4, .process-timeline, .stats-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .feature-grid, .case-banner-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-layout, .media-dual-grid, .footer-top {
        grid-template-columns: 1fr;
      }
      .review-highlight {
        flex-direction: column;
        text-align: center;
      }
      .review-score-box {
        border-right: none;
        padding-right: 0;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 16px;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .main-nav {
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        display: none;
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .main-nav.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        padding: 10px 0;
        border-bottom: 1px solid #f2f3f5;
      }
      .nav-actions {
        display: none;
      }
      .hero-title {
        font-size: 26px;
      }
      .grid-4, .grid-3, .grid-2, .feature-grid, .case-banner-grid, .testimonials-grid, .process-timeline, .stats-container {
        grid-template-columns: 1fr;
      }
      .section-block {
        padding: 50px 0;
      }
    }