:root {
      --bg-page: #fdfbf7;
      --bg-card: #ffffff;
      --text-main: #18181b;
      --text-muted: #52525b;
      --text-light: #71717a;
      --border-dark: #18181b;
      --c-yellow: #ffe66d;
      --c-pink: #ff6b8b;
      --c-cyan: #4ecdc4;
      --c-blue: #38bdf8;
      --c-purple: #c084fc;
      --c-green: #6ee7b7;
      --c-orange: #fb923c;
      --shadow-solid: 4px 4px 0px #18181b;
      --shadow-hover: 6px 6px 0px #18181b;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

    * {
      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;
      position: relative;
      overflow-x: hidden;
      background-image: radial-gradient(#e5e1d8 1.2px, transparent 1.2px);
      background-size: 24px 24px;
    }

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

    /* 容器规范：全局统一，确保居中与边距严格一致 */
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(253, 251, 247, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-dark);
    }

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

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

    .brand-area .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
      border-radius: var(--radius-sm);
    }

    .brand-tagline {
      font-size: 12px;
      font-weight: 700;
      background: var(--c-yellow);
      border: 1.5px solid var(--border-dark);
      padding: 2px 8px;
      border-radius: 999px;
      box-shadow: 2px 2px 0 var(--border-dark);
      display: none;
    }

    @media (min-width: 992px) {
      .brand-tagline { display: inline-block; }
    }

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

    /* 严格遵守指示：.nav-links 的 gap 属性设置为 0 */
    .nav-links {
      display: none;
      list-style: none;
      gap: 0;
      align-items: center;
    }

    @media (min-width: 1024px) {
      .nav-links {
        display: flex;
      }
    }

    .nav-links li {
      margin: 0;
      padding: 0;
    }

    .nav-links a {
      font-size: 14px;
      font-weight: 700;
      padding: 8px 12px;
      border-radius: 6px;
      transition: background-color 0.2s ease, transform 0.15s ease;
      display: block;
    }

    .nav-links a:hover {
      background-color: var(--c-yellow);
      box-shadow: 2px 2px 0 var(--border-dark);
      transform: translateY(-1px);
    }

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

    .btn-doodle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-solid);
      cursor: pointer;
      transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.2s ease;
      text-decoration: none;
      white-space: nowrap;
    }

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

    .btn-doodle:active {
      transform: translate(2px, 2px);
      box-shadow: 0 0 0 var(--border-dark);
    }

    .btn-primary {
      background-color: var(--c-yellow);
      color: var(--text-main);
    }

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

    .btn-cyan {
      background-color: var(--c-cyan);
      color: var(--text-main);
    }

    .mobile-toggle {
      display: flex;
      flex-direction: column;
      gap: 5px;
      background: #fff;
      border: 2px solid var(--border-dark);
      padding: 8px;
      border-radius: var(--radius-sm);
      box-shadow: 2px 2px 0 var(--border-dark);
      cursor: pointer;
    }

    @media (min-width: 1024px) {
      .mobile-toggle { display: none; }
    }

    .mobile-toggle span {
      width: 22px;
      height: 3px;
      background: var(--border-dark);
      border-radius: 2px;
    }

    /* 移动端抽屉菜单 */
    .mobile-menu {
      display: none;
      background: var(--bg-card);
      border-bottom: 3px solid var(--border-dark);
      padding: 16px 20px;
    }

    .mobile-menu.active {
      display: block;
    }

    .mobile-menu ul {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 10px;
    }

    .mobile-menu a {
      display: block;
      padding: 10px;
      font-size: 14px;
      font-weight: 700;
      border: 1.5px solid var(--border-dark);
      border-radius: 6px;
      text-align: center;
      background: #fafafa;
    }

    .mobile-menu a:hover {
      background: var(--c-yellow);
    }

    /* 通用区块排版 */
    section.page-section {
      padding: 72px 0;
      border-bottom: 2px dashed #d1cbbd;
      position: relative;
    }

    .section-header {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-badge {
      display: inline-block;
      font-size: 13px;
      font-weight: 800;
      padding: 4px 12px;
      background: var(--c-green);
      border: 2px solid var(--border-dark);
      border-radius: 999px;
      box-shadow: 3px 3px 0 var(--border-dark);
      margin-bottom: 12px;
      transform: rotate(-1.5deg);
    }

    .section-title {
      font-size: 32px;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-sub {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 首屏 HERO 区域：严格禁止出现任何图片，采用多彩涂鸦与几何图形构建 */
    .hero-section {
      padding: 80px 0 64px 0;
      background: #fbf7ee;
      border-bottom: 3px solid var(--border-dark);
      position: relative;
      overflow: hidden;
    }

    .hero-container {
      text-align: center;
      position: relative;
      z-index: 2;
    }

    .hero-highlight-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-size: 13px;
      font-weight: 800;
      background: var(--c-pink);
      color: #fff;
      border: 2px solid var(--border-dark);
      padding: 6px 16px;
      border-radius: 999px;
      box-shadow: 3px 3px 0 var(--border-dark);
      margin-bottom: 24px;
      transform: rotate(-1deg);
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      max-width: 900px;
      margin: 0 auto 20px auto;
      letter-spacing: -0.8px;
    }

    @media (min-width: 768px) {
      .hero-title { font-size: 48px; }
    }

    .hero-title .title-accent {
      background: linear-gradient(180deg, transparent 65%, var(--c-yellow) 65%);
      display: inline-block;
      padding: 0 4px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px auto;
      font-weight: 500;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
    }

    .btn-hero-official {
      font-size: 16px;
      padding: 14px 32px;
      background: var(--c-yellow);
      box-shadow: 5px 5px 0 var(--border-dark);
    }

    .btn-hero-secondary {
      font-size: 16px;
      padding: 14px 32px;
      background: #ffffff;
      box-shadow: 5px 5px 0 var(--border-dark);
    }

    /* 首屏纯CSS构建的指标数据展示格（无图） */
    .hero-stat-board {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      max-width: 880px;
      margin: 0 auto;
    }

    @media (min-width: 768px) {
      .hero-stat-board {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    .stat-item {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 18px 12px;
      box-shadow: 3px 3px 0 var(--border-dark);
      text-align: center;
      position: relative;
    }

    .stat-item::after {
      content: "";
      position: absolute;
      top: -6px;
      right: 14px;
      width: 24px;
      height: 8px;
      background: rgba(0, 0, 0, 0.1);
      border-radius: 2px;
    }

    .stat-value {
      font-size: 28px;
      font-weight: 900;
      color: var(--text-main);
      display: block;
      line-height: 1.2;
    }

    .stat-label {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* 卡片网格通用样式 */
    .card-grid-3 {
      display: grid;
      grid-template-columns: 1fr;
      gap: 24px;
    }

    .card-grid-4 {
      display: grid;
      grid-template-columns: 1fr;
      gap: 20px;
    }

    @media (min-width: 640px) {
      .card-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .card-grid-4 { grid-template-columns: repeat(2, 1fr); }
    }

    @media (min-width: 1024px) {
      .card-grid-3 { grid-template-columns: repeat(3, 1fr); }
      .card-grid-4 { grid-template-columns: repeat(4, 1fr); }
    }

    .doodle-card {
      background: var(--bg-card);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
      display: flex;
      flex-direction: column;
      position: relative;
    }

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

    .card-icon-pill {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      border: 2px solid var(--border-dark);
      font-size: 20px;
      font-weight: 900;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    .card-title {
      font-size: 18px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }

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

    .card-footer-tag {
      margin-top: 14px;
      font-size: 12px;
      font-weight: 700;
      color: var(--text-main);
      display: inline-block;
      background: #f4f4f5;
      padding: 3px 8px;
      border-radius: 4px;
      border: 1px solid #d4d4d8;
      align-self: flex-start;
    }

    /* 平台矩阵标签云 */
    .model-pill-wall {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 28px;
    }

    .model-chip {
      font-size: 13px;
      font-weight: 700;
      padding: 6px 14px;
      border: 1.5px solid var(--border-dark);
      border-radius: 999px;
      background: #ffffff;
      box-shadow: 2px 2px 0 var(--border-dark);
      transition: all 0.15s ease;
    }

    .model-chip:hover {
      background: var(--c-yellow);
      transform: scale(1.05);
    }

    /* 流程与步骤图 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 16px;
    }

    @media (min-width: 768px) {
      .flow-steps-grid {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    .flow-step-box {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      box-shadow: var(--shadow-solid);
      position: relative;
    }

    .step-badge {
      display: inline-block;
      font-size: 14px;
      font-weight: 900;
      background: var(--c-purple);
      color: #fff;
      border: 1.5px solid var(--border-dark);
      padding: 2px 10px;
      border-radius: 999px;
      margin-bottom: 12px;
    }

    /* 对比评测表格样式 */
    .compare-container {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      box-shadow: 6px 6px 0 var(--border-dark);
    }

    .rating-banner {
      background: #fffbeb;
      border: 2px dashed #f59e0b;
      border-radius: var(--radius-md);
      padding: 16px 20px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 24px;
    }

    .rating-score-box {
      display: flex;
      align-items: baseline;
      gap: 8px;
    }

    .rating-number {
      font-size: 36px;
      font-weight: 900;
      color: #d97706;
      line-height: 1;
    }

    .table-responsive {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 620px;
    }

    .compare-table th, .compare-table td {
      padding: 14px 16px;
      border-bottom: 1.5px solid #e4e4e7;
      font-size: 14px;
    }

    .compare-table th {
      background: #f4f4f5;
      font-weight: 800;
      color: var(--text-main);
      border-top: 1.5px solid var(--border-dark);
      border-bottom: 2px solid var(--border-dark);
    }

    .compare-table td.brand-col {
      background: #fefce8;
      font-weight: 700;
      color: #854d0e;
      border-left: 2px solid var(--border-dark);
      border-right: 2px solid var(--border-dark);
    }

    .compare-table th.brand-col {
      background: var(--c-yellow);
      border-left: 2px solid var(--border-dark);
      border-right: 2px solid var(--border-dark);
    }

    /* 真实图片展示案例模块（首屏后输出） */
    .showcase-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 24px;
    }

    @media (min-width: 768px) {
      .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    .showcase-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-solid);
    }

    .showcase-img-wrap {
      width: 100%;
      background: #f4f4f5;
      overflow: hidden;
      border-bottom: 2px solid var(--border-dark);
    }

    .showcase-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    .showcase-info {
      padding: 20px;
    }

    /* FAQ 折叠手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: 3px 3px 0 var(--border-dark);
      overflow: hidden;
    }

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

    .faq-question:hover {
      background: #fafaf9;
    }

    .faq-toggle-icon {
      font-size: 20px;
      font-weight: 900;
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      display: none;
      padding: 0 20px 18px 20px;
      font-size: 14px;
      color: var(--text-muted);
      border-top: 1px dashed #e4e4e7;
      line-height: 1.7;
    }

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

    /* 客户评价网格 */
    .review-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 20px;
    }

    @media (min-width: 768px) {
      .review-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (min-width: 1024px) {
      .review-grid { grid-template-columns: repeat(3, 1fr); }
    }

    .review-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-solid);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .reviewer-avatar {
      width: 44px;
      height: 44px;
      border-radius: 999px;
      border: 2px solid var(--border-dark);
      background: var(--c-yellow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 18px;
    }

    .reviewer-meta h4 {
      font-size: 15px;
      font-weight: 800;
      line-height: 1.2;
    }

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

    .review-stars {
      color: #f59e0b;
      font-size: 14px;
      margin-bottom: 8px;
    }

    /* 表单与转化区 */
    .form-section-box {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      box-shadow: 6px 6px 0 var(--border-dark);
      max-width: 820px;
      margin: 0 auto;
    }

    .custom-form {
      display: grid;
      grid-template-columns: 1fr;
      gap: 18px;
    }

    @media (min-width: 768px) {
      .form-row-2 {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 18px;
      }
    }

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

    .form-group label {
      font-size: 14px;
      font-weight: 800;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-family: inherit;
      background: #fafafa;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s, background 0.2s;
    }

    .form-control:focus {
      background: #ffffff;
      border-color: #0284c7;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    textarea.form-control {
      min-height: 100px;
      resize: vertical;
    }

    /* 资讯与友情链接 */
    .articles-block {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-solid);
      margin-bottom: 24px;
    }

    .article-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 12px;
    }

    .article-tag-link {
      font-size: 13px;
      font-weight: 700;
      padding: 6px 12px;
      background: #f4f4f5;
      border: 1.5px solid var(--border-dark);
      border-radius: 6px;
      transition: all 0.15s ease;
    }

    .article-tag-link:hover {
      background: var(--c-yellow);
      transform: translateY(-2px);
    }

    /* 页脚 */
    footer.site-footer {
      background-color: #f4efe6;
      border-top: 3px solid var(--border-dark);
      padding: 48px 0 24px 0;
      color: var(--text-main);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    @media (min-width: 768px) {
      .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1.2fr;
      }
    }

    .footer-col h5 {
      font-size: 16px;
      font-weight: 900;
      margin-bottom: 16px;
      position: relative;
      display: inline-block;
    }

    .footer-col p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 8px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-list a {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 600;
      transition: color 0.15s ease;
    }

    .footer-links-list a:hover {
      color: var(--text-main);
      text-decoration: underline;
    }

    .friend-links-area {
      border-top: 1.5px solid #d1cbbd;
      padding-top: 20px;
      margin-top: 24px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links-list a {
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      background: #ffffff;
      border: 1.5px solid var(--border-dark);
      padding: 4px 10px;
      border-radius: 6px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    .footer-bottom {
      border-top: 1.5px solid #d1cbbd;
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
    }

    /* 浮动客服挂件 */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 8px;
    }

    .kefu-btn {
      background: var(--c-yellow);
      border: 2px solid var(--border-dark);
      border-radius: 999px;
      padding: 10px 18px;
      font-size: 13px;
      font-weight: 900;
      box-shadow: 3px 3px 0 var(--border-dark);
      cursor: pointer;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .kefu-popup {
      display: none;
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 14px;
      box-shadow: 4px 4px 0 var(--border-dark);
      text-align: center;
      width: 170px;
    }

    .kefu-popup.show {
      display: block;
    }

    .kefu-popup img {
      width: 100%;
      height: auto;
      border-radius: 6px;
      margin-bottom: 6px;
    }

    .kefu-popup span {
      font-size: 12px;
      font-weight: 700;
      color: var(--text-muted);
    }

    .back-to-top {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: 999px;
      width: 40px;
      height: 40px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      box-shadow: 2px 2px 0 var(--border-dark);
      cursor: pointer;
    }