:root {
      --primary: #e11d48;
      --primary-hover: #be123c;
      --primary-light: #ffe4e6;
      --primary-glow: rgba(225, 29, 72, 0.12);
      --secondary: #fb7185;
      --dark: #1e1e24;
      --slate: #475569;
      --muted: #64748b;
      --light-bg: #fff5f7;
      --section-bg: #fdf2f4;
      --card-bg: #ffffff;
      --border: #fecdd3;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(225, 29, 72, 0.05);
      --shadow-md: 0 8px 24px rgba(225, 29, 72, 0.08);
      --shadow-lg: 0 16px 36px rgba(225, 29, 72, 0.12);
      --container-max: 1200px;
    }

    * {
      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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--light-bg);
      background-image: 
        radial-gradient(circle at 10% 10%, rgba(251, 113, 133, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, rgba(225, 29, 72, 0.05) 0%, transparent 40%);
      background-attachment: fixed;
      color: var(--dark);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

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

    .container {
      width: 100%;
      max-width: var(--container-max);
      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);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-logo-wrap {
      height: 40px;
      display: flex;
      align-items: center;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-meta {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    .brand-tag {
      font-size: 0.75rem;
      color: var(--muted);
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--slate);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: var(--primary-light);
    }

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

    .btn-nav-primary {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff !important;
      padding: 9px 20px;
      border-radius: 50px;
      font-weight: 600;
      font-size: 0.9rem;
      box-shadow: 0 4px 12px rgba(225, 29, 72, 0.25);
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(225, 29, 72, 0.35);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border);
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      color: var(--primary);
      font-weight: bold;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 50px;
      position: relative;
      overflow: hidden;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-light);
      color: var(--primary);
      padding: 6px 16px;
      border-radius: 50px;
      font-size: 0.88rem;
      font-weight: 700;
      margin-bottom: 20px;
      border: 1px solid var(--border);
    }

    .hero-title {
      font-size: 2.35rem;
      line-height: 1.25;
      font-weight: 900;
      color: var(--dark);
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 1.1rem;
      color: var(--slate);
      margin-bottom: 30px;
      line-height: 1.7;
    }

    .hero-btns {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 13px 28px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: 50px;
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
    }

    .btn-main {
      background: linear-gradient(135deg, var(--primary) 0%, #f43f5e 100%);
      color: #ffffff;
      box-shadow: 0 10px 24px rgba(225, 29, 72, 0.3);
    }

    .btn-main:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, var(--primary) 100%);
      transform: translateY(-3px);
      box-shadow: 0 14px 28px rgba(225, 29, 72, 0.4);
    }

    .btn-sub {
      background: #ffffff;
      color: var(--primary);
      border: 2px solid var(--primary);
    }

    .btn-sub:hover {
      background: var(--primary-light);
      transform: translateY(-3px);
    }

    .hero-matrix {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .hero-matrix-title {
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .hero-matrix-badge {
      font-size: 0.75rem;
      background: #ecfdf5;
      color: #059669;
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
    }

    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
    }

    .matrix-card {
      background: var(--light-bg);
      border: 1px solid #ffe4e6;
      padding: 14px;
      border-radius: var(--radius-md);
      transition: all 0.2s ease;
    }

    .matrix-card:hover {
      border-color: var(--secondary);
      background: #ffffff;
      transform: translateY(-2px);
    }

    .matrix-card h4 {
      font-size: 0.95rem;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .matrix-card p {
      font-size: 0.8rem;
      color: var(--muted);
      line-height: 1.4;
    }

    /* 通用区块排版 */
    .section {
      padding: 60px 0;
      position: relative;
    }

    .section-alt {
      background: #fff;
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 44px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 800;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      background: var(--primary-light);
      padding: 4px 14px;
      border-radius: 50px;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 0.98rem;
      color: var(--muted);
      line-height: 1.6;
    }

    /* 数据指标条 */
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

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

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

    .metric-label {
      font-size: 0.85rem;
      color: var(--slate);
      font-weight: 600;
    }

    /* 服务与制作场景网格 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .service-icon {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: bold;
      margin-bottom: 14px;
    }

    .service-card h3 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 8px;
    }

    .service-card p {
      font-size: 0.88rem;
      color: var(--slate);
      line-height: 1.55;
      margin-bottom: 14px;
    }

    .service-meta {
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--primary);
      background: var(--light-bg);
      padding: 4px 10px;
      border-radius: 6px;
      align-self: flex-start;
    }

    /* 模型矩阵胶囊 */
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 7px 16px;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--dark);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
    }

    .model-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

    /* 流程步骤 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      position: relative;
    }

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 38px;
      height: 38px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px;
      font-size: 1.1rem;
    }

    .step-item h3 {
      font-size: 1.05rem;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 0.85rem;
      color: var(--slate);
    }

    /* 评测对比与数据表格 */
    .compare-container {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-md);
    }

    .rating-banner {
      background: linear-gradient(135deg, #fff1f2, #ffe4e6);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-left h3 {
      font-size: 1.25rem;
      color: var(--dark);
      margin-bottom: 4px;
    }

    .rating-left p {
      font-size: 0.88rem;
      color: var(--slate);
    }

    .rating-score {
      text-align: right;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }

    .rating-num {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .rating-max {
      font-size: 0.95rem;
      color: var(--muted);
    }

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

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.9rem;
    }

    .compare-table th,
    .compare-table td {
      padding: 14px 16px;
      border-bottom: 1px solid #fecdd3;
    }

    .compare-table th {
      background: var(--light-bg);
      color: var(--dark);
      font-weight: 700;
    }

    .compare-table td.highlight {
      font-weight: 700;
      color: var(--primary);
      background: rgba(254, 205, 211, 0.2);
    }

    /* 案例展示画廊 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

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

    .gallery-thumb {
      aspect-ratio: 16 / 10;
      overflow: hidden;
      background: #f1f5f9;
    }

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

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

    .gallery-info {
      padding: 16px;
    }

    .gallery-info h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
      color: var(--dark);
    }

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

    /* 客户评价网格 */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 0.9rem;
      color: var(--slate);
      line-height: 1.6;
      margin-bottom: 16px;
      font-style: italic;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border);
      padding-top: 14px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1rem;
    }

    .author-info h4 {
      font-size: 0.92rem;
      color: var(--dark);
    }

    .author-info span {
      font-size: 0.78rem;
      color: var(--muted);
    }

    /* FAQ 折叠面板 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 880px;
      margin: 0 auto;
    }

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

    .faq-question {
      padding: 18px 20px;
      font-size: 1rem;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      transition: background 0.2s ease;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s 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: #fffafa;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 14px 20px 20px;
      border-top: 1px dashed var(--border);
    }

    .faq-answer p {
      font-size: 0.9rem;
      color: var(--slate);
      line-height: 1.6;
    }

    /* 需求匹配与表单 */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-lg);
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 18px;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--dark);
      background: #ffffff;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(225, 29, 72, 0.15);
    }

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

    /* 资讯列表 */
    .article-links-wrap {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 12px;
      margin-top: 20px;
    }

    .article-link-chip {
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: var(--slate);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-link-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--light-bg);
    }

    /* 页脚与联系 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border);
      padding: 50px 0 24px;
      color: var(--dark);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 30px;
      margin-bottom: 36px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--dark);
      margin-bottom: 16px;
      position: relative;
    }

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

    .footer-links li a {
      font-size: 0.88rem;
      color: var(--slate);
    }

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

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .friend-links-box a {
      font-size: 0.82rem;
      color: var(--slate);
      background: var(--light-bg);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border);
    }

    .friend-links-box a:hover {
      color: var(--primary);
      border-color: var(--primary);
    }

    .qr-card {
      display: flex;
      align-items: center;
      gap: 14px;
      background: var(--light-bg);
      border: 1px solid var(--border);
      padding: 12px;
      border-radius: var(--radius-md);
    }

    .qr-card img {
      width: 80px;
      height: 80px;
      border-radius: 6px;
      border: 1px solid #fecdd3;
    }

    .qr-text {
      font-size: 0.82rem;
      color: var(--slate);
    }

    .footer-bottom {
      border-top: 1px solid var(--border);
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: var(--muted);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
    }

    /* 浮动操作条 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 24px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      box-shadow: 0 4px 14px rgba(225, 29, 72, 0.35);
      cursor: pointer;
      border: none;
      transition: all 0.2s ease;
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--primary-hover);
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .grid-4, .step-grid, .metrics-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .gallery-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .nav-links.show {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border);
        padding: 16px;
        box-shadow: var(--shadow-lg);
        gap: 8px;
      }
      .nav-links.show li {
        width: 100%;
        text-align: center;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 1.75rem;
      }
      .grid-4, .grid-3, .grid-2, .gallery-grid, .step-grid, .metrics-bar, .footer-grid, .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .hero-btns {
        flex-direction: column;
      }
      .btn {
        width: 100%;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
      }
      .rating-score {
        text-align: center;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }