:root {
      --primary: #4338ca;
      --primary-light: #6366f1;
      --accent-coral: #ff5e36;
      --accent-cyan: #06b6d4;
      --accent-yellow: #facc15;
      --accent-emerald: #10b981;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 2px 4px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 16px 36px rgba(67, 56, 202, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    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(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    .container {
      width: 100%;
      max-width: 1240px;
      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: 2px solid var(--text-main);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.04);
    }

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

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

    .brand-box .ai-page-logo {
      height: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-tag {
      background: var(--accent-coral);
      color: #ffffff;
      font-size: 0.72rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
      transform: rotate(-3deg);
      display: inline-block;
    }

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

    .nav-links li a {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.08);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn-nav-primary {
      background: var(--accent-coral);
      color: #ffffff !important;
      font-weight: 700;
      font-size: 0.9rem;
      padding: 9px 20px;
      border-radius: 50px;
      border: 2px solid var(--text-main);
      box-shadow: 3px 3px 0px var(--text-main);
      transition: transform 0.15s ease, box-shadow 0.15s ease;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-nav-primary:hover {
      transform: translate(-1px, -1px);
      box-shadow: 5px 5px 0px var(--text-main);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--text-main);
      border-radius: 6px;
      padding: 6px 10px;
      font-size: 1.2rem;
      cursor: pointer;
    }

    /* 首屏 Hero（绝无图片） */
    .hero-section {
      background: linear-gradient(135deg, #fef08a 0%, #fed7aa 30%, #e0e7ff 70%, #ccfbf1 100%);
      border-bottom: 2px solid var(--text-main);
      padding: 70px 0 80px 0;
      position: relative;
      overflow: hidden;
    }

    .hero-badge-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-bottom: 24px;
    }

    .hero-badge {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 3px 3px 0px var(--text-main);
      padding: 6px 14px;
      font-size: 0.85rem;
      font-weight: 800;
      border-radius: 50px;
      color: var(--text-main);
    }

    .hero-badge.highlight {
      background: var(--accent-coral);
      color: #ffffff;
    }

    .hero-title {
      font-size: clamp(2rem, 4.5vw, 3.4rem);
      font-weight: 900;
      line-height: 1.15;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      background: linear-gradient(90deg, #4338ca, #d946ef);
      -webkit-background-clip: text;
      color: var(--primary);
    }

    .hero-desc {
      font-size: clamp(1rem, 1.8vw, 1.2rem);
      color: #334155;
      max-width: 860px;
      margin-bottom: 36px;
      font-weight: 500;
    }

    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 48px;
    }

    .btn-hero-main {
      background: #0f172a;
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 800;
      padding: 15px 36px;
      border-radius: 12px;
      border: 3px solid #0f172a;
      box-shadow: 5px 5px 0px var(--accent-coral);
      transition: all 0.2s ease;
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-hero-main:hover {
      transform: translate(-2px, -2px);
      box-shadow: 8px 8px 0px var(--accent-coral);
    }

    .btn-hero-sub {
      background: #ffffff;
      color: var(--text-main);
      font-size: 1.1rem;
      font-weight: 800;
      padding: 15px 32px;
      border-radius: 12px;
      border: 3px solid #0f172a;
      box-shadow: 5px 5px 0px var(--accent-cyan);
      transition: all 0.2s ease;
    }

    .btn-hero-sub:hover {
      transform: translate(-2px, -2px);
      box-shadow: 8px 8px 0px var(--accent-cyan);
      background: #fdfdfd;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .stat-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 4px 4px 0px var(--text-main);
      padding: 20px;
      border-radius: var(--radius-md);
      transition: transform 0.2s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
    }

    .stat-card:nth-child(1) { border-top: 6px solid var(--accent-coral); }
    .stat-card:nth-child(2) { border-top: 6px solid var(--primary-light); }
    .stat-card:nth-child(3) { border-top: 6px solid var(--accent-cyan); }
    .stat-card:nth-child(4) { border-top: 6px solid var(--accent-emerald); }

    .stat-num {
      font-size: 1.9rem;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    /* 通用Section */
    .section-wrap {
      padding: 80px 0;
      border-bottom: 2px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-pill {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 800;
      padding: 4px 14px;
      border-radius: 50px;
      background: #e0e7ff;
      color: var(--primary);
      border: 1px solid var(--primary);
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.3rem);
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 平台介绍 & 关于我们 */
    .about-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 32px;
      align-items: stretch;
    }

    .about-card-main {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 6px 6px 0px var(--text-main);
      padding: 36px;
      border-radius: var(--radius-lg);
    }

    .about-card-side {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .sub-feature-box {
      background: #f1f5f9;
      border: 2px solid var(--text-main);
      box-shadow: 4px 4px 0px var(--text-main);
      padding: 22px;
      border-radius: var(--radius-md);
      transition: all 0.2s ease;
    }

    .sub-feature-box:hover {
      transform: translateX(4px);
      background: #ffffff;
    }

    .model-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-tag-item {
      font-size: 0.82rem;
      font-weight: 700;
      padding: 5px 12px;
      border-radius: 6px;
      border: 1.5px solid var(--text-main);
      background: #ffffff;
      color: var(--text-main);
    }

    .model-tag-item.hot {
      background: var(--accent-yellow);
      color: #000;
    }

    /* 服务与制作能力矩阵 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 4px 4px 0px var(--text-main);
      padding: 24px;
      border-radius: var(--radius-md);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 6px 6px 0px var(--accent-coral);
    }

    .service-tag {
      align-self: flex-start;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
      border: 1px solid var(--text-main);
    }

    .service-title {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.55;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .service-foot {
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    /* 行业方案与服务网络 */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .solution-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 5px 5px 0px var(--accent-cyan);
      padding: 28px;
      border-radius: var(--radius-lg);
    }

    .solution-icon {
      font-size: 2rem;
      margin-bottom: 12px;
    }

    /* 标准流程时间线 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .timeline-item {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 4px 4px 0px var(--text-main);
      padding: 20px;
      border-radius: var(--radius-md);
      text-align: center;
    }

    .step-badge {
      width: 36px;
      height: 36px;
      line-height: 32px;
      border-radius: 50%;
      background: var(--accent-coral);
      color: #fff;
      font-weight: 900;
      margin: 0 auto 12px auto;
      border: 2px solid var(--text-main);
    }

    /* 对比评测卡片 (9.9分 / 五星) */
    .review-score-banner {
      background: linear-gradient(135deg, #4338ca, #6366f1);
      color: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 6px 6px 0px var(--text-main);
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-left h3 {
      font-size: 1.8rem;
      font-weight: 900;
      margin-bottom: 8px;
    }

    .stars-rating {
      color: var(--accent-yellow);
      font-size: 1.4rem;
      letter-spacing: 2px;
    }

    .score-right {
      display: flex;
      align-items: baseline;
      gap: 6px;
      background: rgba(255, 255, 255, 0.15);
      padding: 16px 28px;
      border-radius: var(--radius-md);
      border: 2px dashed rgba(255, 255, 255, 0.5);
    }

    .score-num {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
      color: #facc15;
    }

    .score-max {
      font-size: 1.2rem;
      font-weight: 700;
    }

    .comparison-table-wrap {
      overflow-x: auto;
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 6px 6px 0px var(--text-main);
      border-radius: var(--radius-lg);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .comparison-table th {
      background: #f1f5f9;
      font-weight: 800;
      font-size: 0.95rem;
      color: var(--text-main);
    }

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

    .highlight-col {
      background: #fefce8;
      font-weight: 700;
      color: var(--primary);
    }

    /* 案例展示区（带图） */
    .cases-media-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-bottom: 24px;
    }

    .media-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 5px 5px 0px var(--text-main);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }

    .media-card .img-container {
      width: 100%;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .media-card img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .media-content {
      padding: 20px;
    }

    .banners-strip {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 8px 8px 0px var(--text-main);
      border-radius: var(--radius-lg);
      padding: 40px;
      max-width: 820px;
      margin: 0 auto;
    }

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

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--text-main);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background: #fafafa;
      transition: border 0.2s ease, background 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
    }

    textarea.form-control {
      min-height: 120px;
      resize: vertical;
    }

    .btn-submit {
      background: var(--accent-coral);
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 800;
      padding: 14px 40px;
      border-radius: 50px;
      border: 2px solid var(--text-main);
      box-shadow: 4px 4px 0px var(--text-main);
      cursor: pointer;
      width: 100%;
      transition: all 0.15s ease;
    }

    .btn-submit:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--text-main);
    }

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

    .review-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 4px 4px 0px var(--text-main);
      padding: 24px;
      border-radius: var(--radius-md);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-stars {
      color: #f59e0b;
      font-size: 1rem;
      margin-bottom: 10px;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 10px;
      border-top: 1px solid var(--border-color);
      padding-top: 12px;
    }

    .author-avatar-badge {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--accent-cyan);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 1.5px solid var(--text-main);
    }

    .author-info h4 {
      font-size: 0.95rem;
      font-weight: 800;
      color: var(--text-main);
    }

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

    /* FAQ 手风琴 (10+条) */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 3px 3px 0px var(--text-main);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 800;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      background: #ffffff;
    }

    .faq-icon {
      font-size: 1.2rem;
      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: #f8fafc;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
      padding: 0 24px;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 16px 24px 20px 24px;
      border-top: 1px dashed var(--border-color);
    }

    /* 行业资讯 & 最新文章 */
    .articles-container {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 6px 6px 0px var(--text-main);
      border-radius: var(--radius-lg);
      padding: 32px;
    }

    .articles-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .art-link-tag {
      background: #f1f5f9;
      border: 1.5px solid var(--text-main);
      padding: 8px 16px;
      border-radius: 8px;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary);
      transition: all 0.2s ease;
    }

    .art-link-tag:hover {
      background: var(--accent-yellow);
      color: #000;
    }

    /* 联系我们 & 加盟代理 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .contact-card {
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 6px 6px 0px var(--text-main);
      border-radius: var(--radius-lg);
      padding: 32px;
    }

    .qr-box {
      display: flex;
      align-items: center;
      gap: 20px;
      background: #f8fafc;
      border: 2px dashed var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      margin-top: 18px;
    }

    .qr-box img {
      width: 110px;
      height: 110px;
      border: 2px solid var(--text-main);
      border-radius: 6px;
    }

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 3px solid var(--text-main);
      padding: 50px 0 30px 0;
      color: var(--text-main);
    }

    .footer-content-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 36px;
    }

    .footer-title {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 12px;
      font-size: 0.88rem;
    }

    .friend-links-box a {
      color: var(--text-muted);
      padding: 4px 10px;
      border-radius: 4px;
      background: #f1f5f9;
      border: 1px solid var(--border-color);
    }

    .friend-links-box a:hover {
      color: var(--primary);
      background: #e0e7ff;
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 悬浮工具 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 2px solid var(--text-main);
      box-shadow: 3px 3px 0px var(--text-main);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      cursor: pointer;
      transition: all 0.2s ease;
      color: var(--text-main);
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--accent-coral);
      color: #ffffff;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid, .contact-grid, .cases-media-grid {
        grid-template-columns: 1fr;
      }
      .solutions-grid, .reviews-grid, .footer-content-grid {
        grid-template-columns: 1fr;
      }
      .timeline-steps {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 2px solid var(--text-main);
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
      .nav-links.active li {
        width: 100%;
      }
      .nav-links.active li a {
        display: block;
        padding: 12px 0;
        border-bottom: 1px solid var(--border-color);
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
    }

    @media (max-width: 600px) {
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .banners-strip {
        grid-template-columns: 1fr;
      }
      .form-wrapper {
        padding: 24px 16px;
      }
      .score-right {
        width: 100%;
        justify-content: center;
      }
    }