:root {
      --primary: #1e3a8a;
      --secondary: #d97706;
      --accent: #dc2626;
      --cyan: #0284c7;
      --bg-base: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --text-main: #0f172a;
      --text-muted: #475569;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.08), 0 4px 6px -4px rgba(0,0,0,0.04);
      --radius: 8px;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: #ffffff;
      border-bottom: 2px solid var(--primary);
      box-shadow: var(--shadow-sm);
    }

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

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

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius);
      transition: color 0.2s ease, background 0.2s ease;
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent);
      background-color: #fef2f2;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 15px;
      font-weight: 700;
      border-radius: var(--radius);
      cursor: pointer;
      transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.2s ease;
      border: 1px solid transparent;
    }

    .btn:hover {
      transform: translateY(-1px);
    }

    .btn-hero {
      background: #dc2626;
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(220, 38, 38, 0.25);
    }

    .btn-hero:hover {
      background: #b91c1c;
      box-shadow: 0 6px 16px rgba(220, 38, 38, 0.35);
    }

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

    .btn-primary:hover {
      background: #172554;
    }

    .btn-accent {
      background: var(--secondary);
      color: #ffffff;
    }

    .btn-accent:hover {
      background: #b45309;
    }

    .btn-outline {
      border: 2px solid var(--primary);
      color: var(--primary);
      background: transparent;
    }

    .btn-outline:hover {
      background: #eff6ff;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 区域通用样式 */
    .section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

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

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 13px;
      font-weight: 800;
      text-transform: uppercase;
      letter-spacing: 1px;
      border-radius: 999px;
      background: #dbeafe;
      color: var(--primary);
      margin-bottom: 12px;
      border: 1px solid #bfdbfe;
    }

    .section-head h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-head p {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* Hero 首屏 (严格无图片) */
    .hero-section {
      background: linear-gradient(135deg, #eff6ff 0%, #ffffff 50%, #fffbeb 100%);
      padding: 90px 0 70px;
      border-bottom: 2px solid var(--border-color);
      position: relative;
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fef3c7;
      color: #92400e;
      border: 1px solid #fde68a;
      padding: 6px 16px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 40px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--primary);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

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

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      border-top: 1px solid #e2e8f0;
      padding-top: 36px;
    }

    .metric-card {
      background: #ffffff;
      border: 2px solid #e2e8f0;
      border-radius: var(--radius);
      padding: 18px 12px;
      text-align: center;
      transition: transform 0.2s ease;
    }

    .metric-card:hover {
      transform: translateY(-2px);
      border-color: var(--primary);
    }

    .metric-value {
      font-size: 28px;
      font-weight: 900;
      color: var(--accent);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 平台介绍与模型矩阵 */
    .models-bar {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      margin-top: 36px;
    }

    .models-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      text-align: center;
    }

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

    .model-tag {
      background: #f1f5f9;
      color: #334155;
      font-size: 13px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid #cbd5e1;
    }

    /* 服务与制作场景卡片 */
    .cards-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.2s ease;
      display: flex;
      flex-direction: column;
    }

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

    .card-top {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
    }

    .card-badge {
      font-size: 11px;
      font-weight: 800;
      padding: 2px 8px;
      border-radius: 4px;
      background: #fef2f2;
      color: var(--accent);
      border: 1px solid #fecaca;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

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

    .step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 18px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--primary);
      color: #ffffff;
      font-size: 20px;
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px auto;
    }

    .step-item h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 素材案例展示 */
    .media-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: center;
    }

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

    .media-card .img-box {
      width: 100%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      aspect-ratio: 16/9;
    }

    .media-card .img-box.square {
      aspect-ratio: 1/1;
    }

    .media-body {
      padding: 20px;
    }

    .media-body h4 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .media-body p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* 对比评测表格 */
    .eval-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      box-shadow: var(--shadow-md);
    }

    .eval-badge-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 2px dashed #e2e8f0;
      padding-bottom: 20px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .eval-score-box {
      display: flex;
      align-items: baseline;
      gap: 10px;
    }

    .eval-score-num {
      font-size: 44px;
      font-weight: 900;
      color: var(--secondary);
      line-height: 1;
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 20px;
    }

    .table-responsive {
      overflow-x: auto;
      margin-top: 10px;
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .eval-table th,
    .eval-table td {
      padding: 14px 18px;
      border-bottom: 1px solid #e2e8f0;
      font-size: 14px;
    }

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

    .eval-table tr:hover td {
      background: #f1f5f9;
    }

    .eval-table .highlight {
      color: var(--primary);
      font-weight: 700;
    }

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

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 14px;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .user-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: #e2e8f0;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 15px;
    }

    .user-meta h5 {
      font-size: 14px;
      font-weight: 700;
    }

    .user-meta p {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .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);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      transition: background 0.2s;
    }

    .faq-question:hover {
      background: #f8fafc;
    }

    .faq-icon {
      font-weight: 800;
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    /* 表单与联系区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 36px;
      align-items: start;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
      background: #ffffff;
      color: var(--text-main);
    }

    .form-control:focus {
      border-color: var(--primary);
    }

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

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .qr-box {
      text-align: center;
      margin-bottom: 24px;
      padding: 16px;
      border: 1px dashed #cbd5e1;
      border-radius: var(--radius);
      background: #f8fafc;
    }

    .qr-box img {
      width: 140px;
      height: 140px;
      margin: 0 auto 12px auto;
      object-fit: contain;
    }

    .qr-box span {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
    }

    .info-list li {
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .info-list strong {
      color: var(--text-main);
      min-width: 90px;
    }

    /* 文章与外链 */
    .articles-block {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      margin-bottom: 30px;
    }

    .articles-block h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

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

    .article-link-item {
      display: inline-block;
      background: #f1f5f9;
      padding: 8px 14px;
      font-size: 13px;
      color: var(--text-main);
      border-radius: 4px;
      border: 1px solid #e2e8f0;
      transition: all 0.2s ease;
    }

    .article-link-item:hover {
      background: #e2e8f0;
      color: var(--primary);
    }

    /* 友情链接与Footer */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 24px;
      color: var(--text-muted);
      font-size: 14px;
    }

    .footer-top {
      padding-bottom: 24px;
      margin-bottom: 24px;
      border-bottom: 1px solid #f1f5f9;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .friend-links strong {
      color: var(--text-main);
    }

    .friend-links a {
      color: var(--text-muted);
      font-size: 13px;
      transition: color 0.2s;
    }

    .friend-links a:hover {
      color: var(--accent);
    }

    .footer-bottom {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }

    /* 侧边浮动 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      font-size: 18px;
      border: none;
      transition: transform 0.2s;
    }

    .floating-btn:hover {
      transform: scale(1.05);
      background: var(--accent);
    }

    .floating-qr {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      width: 140px;
      padding: 10px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-lg);
      text-align: center;
    }

    .floating-qr span {
      font-size: 12px;
      color: var(--text-muted);
      margin-top: 4px;
      display: block;
    }

    .floating-contact:hover .floating-qr {
      display: block;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .cards-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-wrapper {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .media-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 32px;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid-4 {
        grid-template-columns: 1fr;
      }
      .steps-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }