:root {
      --primary: #059669;
      --primary-hover: #047857;
      --primary-light: #10b981;
      --primary-subtle: #ecfdf5;
      --primary-border: #a7f3d0;
      --accent-lime: #10b981;
      --text-main: #0f172a;
      --text-muted: #334155;
      --text-sub: #64748b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-subtle: #f1f5f9;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 6px 16px -2px rgba(5, 150, 105, 0.08), 0 4px 6px -2px rgba(0,0,0,0.04);
      --shadow-lg: 0 16px 32px -4px rgba(5, 150, 105, 0.12), 0 8px 12px -4px rgba(0,0,0,0.04);
      --radius: 12px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .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-color);
      box-shadow: 0 2px 8px rgba(0,0,0,0.03);
    }

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

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      max-width: 140px;
    }

    .brand-tagline {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
      background: var(--primary-subtle);
      padding: 3px 8px;
      border-radius: 6px;
      border: 1px solid var(--primary-border);
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: 6px;
      transition: var(--transition);
    }

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

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

    .btn-header {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      background: var(--primary);
      color: #ffffff !important;
      font-size: 14px;
      font-weight: 600;
      border-radius: 8px;
      box-shadow: 0 2px 6px rgba(5, 150, 105, 0.25);
      transition: var(--transition);
    }

    .btn-header:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
      box-shadow: 0 4px 10px rgba(5, 150, 105, 0.35);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 醒目标准按钮 */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 28px;
      background: linear-gradient(135deg, #059669 0%, #10b981 100%);
      color: #ffffff !important;
      font-size: 16px;
      font-weight: 700;
      border-radius: 10px;
      border: 1px solid rgba(255, 255, 255, 0.2);
      box-shadow: 0 6px 20px rgba(5, 150, 105, 0.3);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, #047857 0%, #059669 100%);
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(5, 150, 105, 0.4);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 13px 26px;
      background: #ffffff;
      color: var(--primary) !important;
      font-size: 16px;
      font-weight: 600;
      border-radius: 10px;
      border: 1px solid var(--primary-border);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .btn-secondary:hover {
      background: var(--primary-subtle);
      border-color: var(--primary);
      transform: translateY(-1px);
    }

    /* 通用区块排版 */
    section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      background: var(--primary-subtle);
      border: 1px solid var(--primary-border);
      padding: 4px 14px;
      border-radius: 30px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 HERO（纯代码/无图片） */
    .hero-section {
      padding: 90px 0 80px;
      background: radial-gradient(circle at 50% 20%, #ecfdf5 0%, #ffffff 70%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--primary-border);
      padding: 6px 16px;
      border-radius: 50px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary-hover);
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.08);
      margin-bottom: 24px;
    }

    .hero-badge-pulse {
      width: 8px;
      height: 8px;
      background: var(--accent-lime);
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title span {
      color: var(--primary);
      position: relative;
    }

    .hero-subtitle {
      max-width: 840px;
      margin: 0 auto 36px;
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.8;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1040px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-top: 3px solid var(--primary);
      padding: 24px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .stat-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 6px;
    }

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

    /* 聚合模型徽章轮播/列表 */
    .models-showcase {
      background: #ffffff;
      padding: 30px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .models-label {
      text-align: center;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-sub);
      letter-spacing: 0.5px;
      margin-bottom: 16px;
    }

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

    .model-tag {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      background: var(--bg-main);
      padding: 6px 14px;
      border-radius: 20px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-subtle);
    }

    /* 服务与能力网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-subtle);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 20px;
      margin-bottom: 18px;
      border: 1px solid var(--primary-border);
    }

    .service-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

    .service-card .service-footer {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
    }

    /* 场景矩阵与制作能力 (两列/卡片流) */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .scenario-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius);
      transition: var(--transition);
    }

    .scenario-item:hover {
      border-color: var(--primary);
      background: var(--primary-subtle);
      transform: translateY(-3px);
    }

    .scenario-item h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .scenario-item h4::before {
      content: "";
      display: inline-block;
      width: 6px;
      height: 6px;
      background: var(--primary);
      border-radius: 50%;
    }

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

    /* 案例展示区与图片 */
    .cases-container {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
      align-items: center;
    }

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

    .media-card-img-wrap {
      width: 100%;
      background: var(--bg-subtle);
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.02);
    }

    .media-card-body {
      padding: 20px;
    }

    .media-card-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .media-card-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 对比评测表格与评分体系 */
    .review-score-banner {
      background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
      border: 1px solid var(--primary-border);
      border-radius: var(--radius);
      padding: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

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

    .score-badge {
      background: var(--primary);
      color: #ffffff;
      padding: 12px 20px;
      border-radius: 12px;
      text-align: center;
    }

    .score-num {
      font-size: 36px;
      font-weight: 900;
      line-height: 1;
    }

    .score-max {
      font-size: 12px;
      opacity: 0.9;
    }

    .score-meta h3 {
      font-size: 20px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stars-icon {
      color: #f59e0b;
      font-size: 18px;
      letter-spacing: 2px;
    }

    .comparison-table-wrapper {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .comparison-table th {
      background: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }

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

    .comparison-table .highlight-col {
      background: #f0fdf4;
      color: var(--primary-hover);
      font-weight: 700;
    }

    /* 标准流程时间轴 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .flow-step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 20px;
      position: relative;
    }

    .flow-step-card::before {
      content: attr(data-step);
      position: absolute;
      top: -12px;
      left: 20px;
      background: var(--primary);
      color: #ffffff;
      font-size: 12px;
      font-weight: 800;
      padding: 2px 10px;
      border-radius: 20px;
    }

    .flow-step-title {
      font-size: 16px;
      font-weight: 700;
      margin: 10px 0 8px;
      color: var(--text-main);
    }

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

    /* 客户评价网格 (6条评论) */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .testimonial-quote {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 20px;
      position: relative;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .user-avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-subtle);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
      border: 1px solid var(--primary-border);
    }

    .user-meta h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

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

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

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

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

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question:hover {
      background: var(--primary-subtle);
    }

    .faq-icon {
      font-size: 20px;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.25s 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: #ffffff;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    /* 需求匹配与表单 */
    .form-section-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

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

    .form-info-box h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .form-info-box ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 20px;
    }

    .form-info-box li {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      color: var(--text-muted);
    }

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

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 700;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #fdfdfd;
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
    }

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

    /* 行业资讯与动态 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-sm);
    }

    .article-item h4 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .article-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
      margin-bottom: 14px;
    }

    .article-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--primary);
    }

    /* 页脚设计 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 14px;
    }

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

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #f8fafc;
      margin-bottom: 18px;
      position: relative;
    }

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

    .footer-links-list a {
      color: #94a3b8;
      transition: var(--transition);
    }

    .footer-links-list a:hover {
      color: #34d399;
    }

    .footer-contact-info p {
      margin-bottom: 8px;
      color: #cbd5e1;
    }

    .footer-qrcode-wrap {
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      display: inline-block;
      max-width: 110px;
      margin-top: 10px;
    }

    .footer-qrcode-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }

    .friend-links-box {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
      font-size: 13px;
    }

    .friend-links-box span {
      color: #cbd5e1;
      font-weight: 600;
    }

    .friend-links-box a {
      color: #94a3b8;
      transition: var(--transition);
    }

    .friend-links-box a:hover {
      color: #34d399;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

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

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      color: var(--primary);
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式媒体查询 */
    @media (max-width: 1024px) {
      .hero-stats-grid,
      .scenario-grid,
      .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid,
      .testimonials-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 30px;
      }
      .hero-stats-grid,
      .services-grid,
      .scenario-grid,
      .flow-steps-grid,
      .testimonials-grid,
      .articles-grid,
      .cases-container,
      .form-section-layout,
      .footer-top {
        grid-template-columns: 1fr;
      }
      .header-action .btn-header {
        display: none;
      }
    }