:root {
      --primary: #f97316;
      --primary-dark: #ea580c;
      --primary-deep: #c2410c;
      --primary-light: #fff7ed;
      --accent: #ff5722;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-main: #fafaf9;
      --bg-card: #ffffff;
      --border-color: #fed7aa;
      --border-light: #ffedd5;
      --shadow-sm: 0 2px 8px rgba(249, 115, 22, 0.08);
      --shadow-md: 0 10px 25px -5px rgba(249, 115, 22, 0.12), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 20px 30px -10px rgba(234, 88, 12, 0.18);
      --radius: 12px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #fffaf5 0%, #fafaf9 300px, #fff7ed 100%);
      min-height: 100vh;
    }

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
      font-weight: 700;
      font-size: 1.25rem;
    }

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

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-main);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      border-radius: 6px;
      transition: var(--transition);
      white-space: nowrap;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-primary {
      background: linear-gradient(135deg, #ff6b00 0%, #f97316 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(249, 115, 22, 0.35);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(249, 115, 22, 0.45);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      background: var(--primary-light);
      border-color: var(--primary-dark);
      color: var(--primary-dark);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 模块通用样式 */
    section {
      padding: 70px 0;
      position: relative;
    }

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

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }

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

    /* 首屏 Hero (严禁包含图片) */
    .hero-section {
      padding: 90px 0 80px 0;
      background: radial-gradient(circle at 50% 20%, rgba(255, 237, 213, 0.8) 0%, rgba(250, 250, 249, 0) 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 24px;
    }

    .hero-badge .pulse-dot {
      width: 8px;
      height: 8px;
      background: #22c55e;
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(34, 197, 94, 0.2);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 24px;
      color: #0f172a;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 18px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .btn-hero-main {
      padding: 14px 34px;
      font-size: 1.1rem;
      border-radius: 10px;
      background: linear-gradient(135deg, #ff5722 0%, #f97316 100%);
      color: #ffffff;
      font-weight: 700;
      box-shadow: 0 10px 25px rgba(249, 115, 22, 0.4);
      border: none;
    }

    .btn-hero-main:hover {
      background: linear-gradient(135deg, #e64a19 0%, #ea580c 100%);
      transform: translateY(-2px);
      box-shadow: 0 14px 30px rgba(249, 115, 22, 0.5);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .hero-stat-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .stat-number {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 平台介绍与关于我们 */
    .about-card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .about-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 30px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .about-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--border-color);
    }

    .about-icon-box {
      width: 52px;
      height: 52px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: bold;
      margin-bottom: 20px;
    }

    .about-card h3 {
      font-size: 1.25rem;
      margin-bottom: 12px;
      color: #0f172a;
    }

    .about-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 模型矩阵徽章云 */
    .model-tags-wrap {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 24px;
      margin-top: 30px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .model-tags-wrap h4 {
      font-size: 1rem;
      color: var(--text-muted);
      margin-bottom: 16px;
    }

    .tags-flex {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .tag-item {
      background: var(--primary-light);
      color: var(--primary-deep);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      transition: var(--transition);
    }

    .tag-item:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* 核心服务与一站式制作网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 28px;
      border: 1px solid #fed7aa;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }

    .service-card-head {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .service-badge-pill {
      background: #ffedd5;
      color: #c2410c;
      padding: 2px 10px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
    }

    .service-card h3 {
      font-size: 1.2rem;
      color: #0f172a;
    }

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

    .service-feature-list {
      list-style: none;
      margin-bottom: 20px;
    }

    .service-feature-list li {
      font-size: 0.88rem;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .service-feature-list li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }

    /* 图文素材与案例展示 */
    .showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-bottom: 30px;
    }

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

    .showcase-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
    }

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

    .showcase-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.5s ease;
    }

    .showcase-item:hover .showcase-img-wrap img {
      transform: scale(1.03);
    }

    .showcase-info {
      padding: 20px;
    }

    .showcase-info h4 {
      font-size: 1.15rem;
      color: #0f172a;
      margin-bottom: 8px;
    }

    .showcase-info p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .banner-gallery-row {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 24px;
    }

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

    .banner-card img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 对比评测表格与卡片 */
    .compare-section {
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .score-banner {
      background: linear-gradient(135deg, #fff7ed 0%, #ffedd5 100%);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-banner-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.5rem;
      letter-spacing: 2px;
    }

    .score-highlight {
      font-size: 2.2rem;
      font-weight: 900;
      color: #ea580c;
    }

    .score-banner-right {
      font-size: 0.95rem;
      color: #7c2d12;
      max-width: 500px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
    }

    .compare-table th {
      background: #fff7ed;
      color: #9a3412;
      font-weight: 700;
    }

    .compare-table td.brand-col {
      font-weight: 700;
      color: var(--primary-dark);
      background: #fffaf5;
    }

    .badge-win {
      display: inline-block;
      padding: 2px 8px;
      background: #dcfce7;
      color: #15803d;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 700;
      margin-left: 6px;
    }

    /* 行业方案与标准流程 */
    .timeline-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 24px;
      border: 1px solid var(--border-light);
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-number {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, #f97316 0%, #ea580c 100%);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .step-card h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: #0f172a;
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

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

    .review-card {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 26px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-user-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffedd5;
      color: #ea580c;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .review-user-info h5 {
      font-size: 1rem;
      color: #0f172a;
    }

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

    .review-body {
      font-size: 0.92rem;
      color: #334155;
      line-height: 1.6;
      font-style: italic;
    }

    /* FAQ 手风琴 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-item.active {
      border-color: var(--primary);
    }

    .faq-header {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 600;
      font-size: 1.05rem;
      color: #0f172a;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary);
    }

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

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: #fffaf5;
      color: #475569;
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-content-inner {
      padding: 0 24px 20px 24px;
    }

    /* 表单与需求匹配 */
    .match-form-wrap {
      background: #ffffff;
      border-radius: 20px;
      padding: 40px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      max-width: 800px;
      margin: 0 auto;
    }

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

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .form-group.full-width {
      grid-column: 1 / -1;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: #334155;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: 8px;
      font-size: 0.95rem;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      background: #fafaf9;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.15);
    }

    /* 资讯与百科文章 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .article-card {
      background: #ffffff;
      border-radius: var(--radius);
      padding: 24px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-card h4 {
      font-size: 1.1rem;
      margin-bottom: 12px;
      color: #0f172a;
    }

    .article-card h4 a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    .article-card h4 a:hover {
      color: var(--primary);
    }

    .article-meta {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 14px;
    }

    /* 加盟代理与被动收益 */
    .partner-banner {
      background: linear-gradient(135deg, #ea580c 0%, #c2410c 100%);
      color: #ffffff;
      border-radius: 20px;
      padding: 50px 40px;
      text-align: center;
    }

    .partner-banner h3 {
      font-size: 2rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .partner-banner p {
      font-size: 1.05rem;
      max-width: 700px;
      margin: 0 auto 30px auto;
      opacity: 0.9;
    }

    /* 页脚 */
    footer.site-footer {
      background: #1e293b;
      color: #f8fafc;
      padding: 60px 0 30px 0;
      margin-top: 60px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1.1rem;
      color: #ffffff;
      margin-bottom: 18px;
      position: relative;
    }

    .footer-col p {
      font-size: 0.9rem;
      color: #94a3b8;
      line-height: 1.7;
      margin-bottom: 10px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links li a {
      color: #cbd5e1;
      text-decoration: none;
      font-size: 0.9rem;
      transition: var(--transition);
    }

    .footer-links li a:hover {
      color: #fb923c;
    }

    .footer-qr-wrap {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 10px;
    }

    .footer-qr-wrap img {
      width: 110px;
      height: 110px;
      border-radius: 8px;
      background: #ffffff;
      padding: 4px;
    }

    .footer-qr-wrap span {
      font-size: 0.85rem;
      color: #94a3b8;
    }

    .footer-friends-bar {
      border-top: 1px solid #334155;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }

    .footer-friends-bar span {
      font-size: 0.9rem;
      color: #94a3b8;
      font-weight: 600;
    }

    .footer-friends-bar a {
      color: #cbd5e1;
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

    .footer-friends-bar a:hover {
      color: #fb923c;
    }

    .footer-bottom-bar {
      border-top: 1px solid #334155;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    /* 浮动工具栏 */
    .floating-toolbar {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      border: 1px solid var(--border-light);
      cursor: pointer;
      transition: var(--transition);
      font-size: 1.2rem;
    }

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

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid, 
      .about-card-grid,
      .articles-grid,
      .reviews-grid,
      .timeline-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .showcase-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li a {
        width: 100%;
        padding: 12px 16px;
      }
      .hero-title {
        font-size: 2rem;
      }
      .section-title {
        font-size: 1.7rem;
      }
      .services-grid, 
      .about-card-grid,
      .articles-grid,
      .reviews-grid,
      .timeline-steps,
      .banner-gallery-row {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }