/* CSS RESET & VARIABLES */
    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    :root {
      --bg-main: #faf9f6;
      --bg-surface: #ffffff;
      --bg-alt: #f3f0e6;
      --text-main: #1c1c1e;
      --text-muted: #55555c;
      --text-light: #7b7b84;
      
      /* 多彩涂鸦风核心色板 */
      --c-yellow: #ffdf00;
      --c-pink: #ff3b69;
      --c-cyan: #00d2d3;
      --c-blue: #2e66ff;
      --c-green: #10ac84;
      --c-purple: #7d5fff;
      --c-orange: #ff7640;
      --border-dark: #1e1e24;
      
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-pill: 9999px;
      
      --shadow-doodle: 4px 4px 0px var(--border-dark);
      --shadow-doodle-lg: 6px 6px 0px var(--border-dark);
      --shadow-doodle-hover: 2px 2px 0px var(--border-dark);
      
      --container-max: 1200px;
      --transition: all 0.22s cubic-bezier(0.34, 1.56, 0.64, 1);
    }

    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-color: var(--bg-main);
      color: var(--text-main);
      overflow-x: hidden;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

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

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

    /* 容器规范 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 涂鸦风徽章与按钮 */
    .doodle-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 14px;
      background: var(--c-yellow);
      border: 2px solid var(--border-dark);
      box-shadow: 2px 2px 0px var(--border-dark);
      border-radius: var(--radius-pill);
      font-weight: 700;
      font-size: 0.875rem;
      color: var(--border-dark);
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .doodle-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      font-weight: 800;
      font-size: 1rem;
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-md);
      cursor: pointer;
      box-shadow: var(--shadow-doodle);
      transition: var(--transition);
      text-align: center;
      background: var(--bg-surface);
      color: var(--border-dark);
      text-decoration: none;
    }

    .doodle-btn:hover {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-doodle-hover);
    }

    .doodle-btn:active {
      transform: translate(4px, 4px);
      box-shadow: 0px 0px 0px var(--border-dark);
    }

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

    .doodle-btn-accent {
      background: var(--c-yellow);
      color: var(--border-dark);
    }

    .doodle-btn-cyan {
      background: var(--c-cyan);
      color: var(--border-dark);
    }

    .doodle-btn-purple {
      background: var(--c-purple);
      color: #ffffff;
    }

    /* 涂鸦风卡片基底 */
    .doodle-card {
      background: var(--bg-surface);
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle);
      padding: 24px;
      position: relative;
      transition: var(--transition);
    }

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

    /* 章节通用样式 */
    .section-padding {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px auto;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 900;
      color: var(--border-dark);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: 2px;
      left: -5%;
      width: 110%;
      height: 8px;
      background: var(--c-yellow);
      z-index: -1;
      border-radius: 4px;
      opacity: 0.85;
      transform: rotate(-0.5deg);
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 1. 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(250, 249, 246, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 2.5px solid var(--border-dark);
      padding: 12px 0;
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .logo-area .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-text {
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--border-dark);
      letter-spacing: -0.5px;
    }

    /* 遵循规则：.nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover {
      background: var(--c-yellow);
      color: var(--border-dark);
    }

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

    .mobile-menu-btn {
      display: none;
      background: var(--bg-surface);
      border: 2px solid var(--border-dark);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      font-weight: 900;
      cursor: pointer;
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    /* 2. 首屏 HERO 区域（严格无图片，高动感涂鸦几何） */
    .hero-section {
      padding: 60px 0 50px 0;
      background: radial-gradient(circle at 80% 20%, rgba(255, 223, 0, 0.25) 0%, transparent 40%),
                  radial-gradient(circle at 10% 80%, rgba(255, 59, 105, 0.15) 0%, transparent 45%);
      position: relative;
      border-bottom: 2.5px solid var(--border-dark);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 36px;
      align-items: center;
    }

    .hero-content h1 {
      font-size: 2.45rem;
      font-weight: 900;
      color: var(--border-dark);
      line-height: 1.25;
      margin-bottom: 18px;
    }

    .hero-content .highlight {
      background: linear-gradient(120deg, var(--c-yellow) 0%, var(--c-yellow) 100%);
      background-repeat: no-repeat;
      background-size: 100% 35%;
      background-position: 0 88%;
      padding: 0 4px;
    }

    .hero-sub {
      font-size: 1.1rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 28px;
    }

    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 32px;
    }

    .hero-feature-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .hero-tag {
      font-size: 0.82rem;
      font-weight: 700;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      border: 1.5px solid var(--border-dark);
      background: #fff;
    }

    /* 首屏右侧纯 CSS/SVG 交互模拟面板 (无图片) */
    .hero-doodle-box {
      background: var(--bg-surface);
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle-lg);
      padding: 24px;
      position: relative;
    }

    .doodle-box-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 2px dashed var(--border-dark);
      padding-bottom: 12px;
      margin-bottom: 16px;
    }

    .box-dots {
      display: flex;
      gap: 6px;
    }

    .box-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      border: 1.5px solid var(--border-dark);
    }
    .dot-red { background: var(--c-pink); }
    .dot-yellow { background: var(--c-yellow); }
    .dot-green { background: var(--c-green); }

    .box-status {
      font-size: 0.8rem;
      font-weight: 800;
      background: var(--c-cyan);
      padding: 2px 8px;
      border-radius: var(--radius-pill);
      border: 1.5px solid var(--border-dark);
    }

    .live-model-flow {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .flow-item {
      background: var(--bg-main);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 12px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 10px;
    }

    .flow-info strong {
      display: block;
      font-size: 0.95rem;
      color: var(--border-dark);
    }

    .flow-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .flow-tag {
      font-size: 0.75rem;
      font-weight: 800;
      padding: 4px 8px;
      border-radius: var(--radius-sm);
      border: 1.5px solid var(--border-dark);
      white-space: nowrap;
    }

    /* 3. 数据指标条 */
    .metrics-bar {
      background: var(--c-yellow);
      border-bottom: 2.5px solid var(--border-dark);
      padding: 24px 0;
    }

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

    .metric-card {
      border-right: 2px dashed var(--border-dark);
      padding: 0 10px;
    }

    .metric-card:last-child {
      border-right: none;
    }

    .metric-value {
      font-size: 2rem;
      font-weight: 900;
      color: var(--border-dark);
      display: block;
      line-height: 1.1;
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--border-dark);
    }

    /* 4. 平台模型聚合 Ticker & Grid */
    .models-banner {
      padding: 30px 0;
      background: #ffffff;
      border-bottom: 2.5px solid var(--border-dark);
    }

    .models-tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 16px;
    }

    .model-chip {
      background: var(--bg-main);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-pill);
      padding: 6px 14px;
      font-size: 0.88rem;
      font-weight: 800;
      color: var(--border-dark);
      box-shadow: 2px 2px 0px var(--border-dark);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--c-cyan);
      transform: translateY(-2px);
    }

    /* 5. AIGC核心服务矩阵 (卡片网格) */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .service-card {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }

    .card-icon-tag {
      width: 44px;
      height: 44px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 900;
      box-shadow: 2px 2px 0px var(--border-dark);
      margin-bottom: 16px;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--border-dark);
      margin-bottom: 8px;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .card-footer-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .mini-tag {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 8px;
      background: var(--bg-alt);
      border: 1px solid var(--border-dark);
      border-radius: var(--radius-sm);
    }

    /* 6. 对比评测模块 (评分 9.9) */
    .rating-header-box {
      background: var(--c-yellow);
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
    }

    .rating-score-num {
      font-size: 3.2rem;
      font-weight: 900;
      color: var(--border-dark);
      line-height: 1;
    }

    .rating-stars {
      color: var(--c-pink);
      font-size: 1.6rem;
      letter-spacing: 2px;
    }

    .comparison-table-wrapper {
      overflow-x: auto;
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-doodle);
      background: #ffffff;
    }

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

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 2px solid var(--border-dark);
      font-size: 0.95rem;
    }

    .comparison-table th {
      background: var(--bg-alt);
      font-weight: 900;
      color: var(--border-dark);
    }

    .comparison-table th.highlight-col, .comparison-table td.highlight-col {
      background: #fff8d6;
      font-weight: 800;
      color: var(--border-dark);
      border-left: 2px solid var(--border-dark);
      border-right: 2px solid var(--border-dark);
    }

    /* 7. Token 比价板块 */
    .pricing-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-badge-top {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--c-pink);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 900;
      padding: 4px 10px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-pill);
      box-shadow: 2px 2px 0px var(--border-dark);
    }

    .price-num {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--border-dark);
      margin: 12px 0 6px 0;
    }

    .price-unit {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: normal;
    }

    .price-feature-list {
      list-style: none;
      margin: 20px 0;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .price-feature-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      font-weight: 600;
    }

    .check-icon {
      color: var(--c-green);
      font-weight: 900;
    }

    /* 8. 标准流程步骤 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-card {
      position: relative;
    }

    .step-num {
      display: inline-block;
      width: 36px;
      height: 36px;
      line-height: 32px;
      text-align: center;
      background: var(--c-yellow);
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      font-weight: 900;
      font-size: 1.1rem;
      box-shadow: 2px 2px 0px var(--border-dark);
      margin-bottom: 12px;
    }

    /* 9. 案例中心（含官方真实图片素材） */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      overflow: hidden;
      padding: 0;
    }

    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #eee;
      border-bottom: 2.5px solid var(--border-dark);
      overflow: hidden;
    }

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

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

    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 18px;
    }

    .case-body h4 {
      font-size: 1.15rem;
      font-weight: 900;
      color: var(--border-dark);
      margin-bottom: 6px;
    }

    .case-body p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 宣传横幅图组件 */
    .banner-gallery {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 30px;
    }

    .banner-item {
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-doodle);
    }

    /* 10. 用户真实评论（6条） */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1rem;
      color: var(--border-dark);
    }

    .review-user-info strong {
      display: block;
      font-size: 0.95rem;
      color: var(--border-dark);
    }

    .review-user-info span {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .review-quote {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 11. FAQ 手风琴折叠面板 (>=10项) */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-md);
      background: #ffffff;
      box-shadow: var(--shadow-doodle);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 16px 20px;
      font-size: 1.05rem;
      font-weight: 800;
      color: var(--border-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #ffffff;
    }

    .faq-question:hover {
      background: var(--bg-alt);
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 900;
      transition: transform 0.2s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      background: #ffffff;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 0 20px 16px 20px;
      border-top: 1.5px dashed var(--border-dark);
    }

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

    /* 12. 文章与行业资讯 */
    .articles-box {
      background: var(--bg-surface);
      border: 2.5px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-doodle);
    }

    .articles-links-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 16px;
    }

    .article-item-link {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: var(--bg-main);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      font-weight: 700;
      font-size: 0.92rem;
      color: var(--border-dark);
    }

    .article-item-link:hover {
      background: var(--c-yellow);
      transform: translateX(4px);
    }

    /* 13. 表单与联系我们板块 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
      align-items: start;
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .form-group label {
      font-size: 0.9rem;
      font-weight: 800;
      color: var(--border-dark);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      background: #ffffff;
      color: var(--text-main);
      outline: none;
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--c-blue);
      box-shadow: 2px 2px 0px var(--c-blue);
    }

    .contact-info-card {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 20px;
      padding: 16px;
      background: var(--bg-alt);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
    }

    .qr-container img {
      width: 110px;
      height: 110px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      object-fit: cover;
      background: #fff;
    }

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

    .info-list-group li {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    /* 14. 加盟代理 Banner */
    .agency-banner {
      background: var(--c-cyan);
      border: 3px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-doodle-lg);
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 24px;
    }

    .agency-content h3 {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--border-dark);
      margin-bottom: 8px;
    }

    .agency-content p {
      font-size: 1rem;
      color: var(--border-dark);
      font-weight: 600;
    }

    /* 15. 页脚系统 */
    .site-footer {
      background: #1e1e24;
      color: #eaeaea;
      border-top: 3px solid var(--border-dark);
      padding: 50px 0 24px 0;
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 32px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 900;
      color: var(--c-yellow);
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 0.88rem;
      color: #b0b0b8;
      line-height: 1.6;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 16px;
      position: relative;
    }

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

    .footer-col ul li a {
      font-size: 0.88rem;
      color: #b0b0b8;
    }

    .footer-col ul li a:hover {
      color: var(--c-yellow);
      padding-left: 4px;
    }

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

    .friend-links-wrap a {
      font-size: 0.82rem;
      color: #b0b0b8;
      background: rgba(255, 255, 255, 0.08);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .friend-links-wrap a:hover {
      background: var(--c-pink);
      color: #fff;
    }

    .footer-bottom {
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.85rem;
      color: #8e8e96;
    }

    /* 悬浮客服与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      background: var(--c-yellow);
      color: var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: 900;
      box-shadow: var(--shadow-doodle);
      cursor: pointer;
      transition: var(--transition);
    }

    .floating-btn:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-doodle-lg);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .grid-3, .pricing-grid, .reviews-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4, .step-grid, .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-surface);
        border-bottom: 2.5px solid var(--border-dark);
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .grid-3, .pricing-grid, .reviews-grid, .cases-grid, .grid-4, .step-grid, .metrics-grid, .banner-gallery, .articles-links-list {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .hero-content h1 {
        font-size: 1.9rem;
      }
      .agency-banner {
        text-align: center;
        justify-content: center;
      }
    }