:root {
      --primary: #1e5bfb;
      --primary-hover: #1246db;
      --primary-light: #eef4ff;
      --accent: #ff6b00;
      --accent-light: #fff2e8;
      --text-main: #1d2129;
      --text-sub: #4e5969;
      --text-muted: #86909c;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e5e6eb;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 8px 24px rgba(30, 91, 251, 0.08);
      --shadow-hover: 0 12px 32px rgba(30, 91, 251, 0.14);
      --radius: 12px;
      --max-width: 1200px;
      --transition: all 0.28s ease;
    }

    * {
      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;
      overflow-x: hidden;
    }

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

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

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

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

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

    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-sub);
      max-width: 680px;
      margin: 0 auto;
    }

    /* 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-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-sub);
      border-radius: 6px;
    }

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

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

    .btn-nav-primary {
      padding: 9px 20px;
      background: var(--primary);
      color: #ffffff !important;
      font-weight: 600;
      font-size: 0.95rem;
      border-radius: 6px;
      box-shadow: 0 4px 12px rgba(30, 91, 251, 0.25);
    }

    .btn-nav-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-1px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: 6px;
      cursor: pointer;
      font-size: 1rem;
      color: var(--text-main);
    }

    /* 首屏 Hero (严格无图片) */
    .hero-section {
      background: linear-gradient(135deg, #ffffff 0%, #f0f6ff 50%, #e6efff 100%);
      padding: 70px 0 60px;
      border-bottom: 1px solid #e2edfc;
      position: relative;
    }

    .hero-wrapper {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge-wrap {
      display: flex;
      gap: 8px;
      margin-bottom: 18px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid #d4e3fc;
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      box-shadow: 0 2px 6px rgba(30, 91, 251, 0.05);
    }

    h1.hero-main-title {
      font-size: 2.3rem;
      line-height: 1.3;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

    .hero-lead-text {
      font-size: 1.1rem;
      line-height: 1.7;
      color: var(--text-sub);
      margin-bottom: 32px;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 30px;
    }

    .btn-main-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(90deg, #1e5bfb 0%, #0c43d4 100%);
      color: #ffffff !important;
      font-size: 1.1rem;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 8px;
      box-shadow: 0 8px 24px rgba(30, 91, 251, 0.35);
      animation: pulseBtn 2.4s infinite;
    }

    .btn-main-action:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(30, 91, 251, 0.45);
    }

    .btn-secondary-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      font-size: 1.05rem;
      font-weight: 600;
      padding: 13px 28px;
      border-radius: 8px;
    }

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

    .hero-features-list {
      display: flex;
      gap: 20px;
      list-style: none;
      padding-top: 16px;
      border-top: 1px dashed #cedcf5;
    }

    .hero-features-list li {
      font-size: 0.88rem;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .hero-features-list li::before {
      content: "✓";
      color: #10b981;
      font-weight: bold;
    }

    .hero-data-card {
      background: #ffffff;
      border-radius: 16px;
      padding: 32px;
      box-shadow: var(--shadow-md);
      border: 1px solid #d9e6fb;
      position: relative;
    }

    .hero-data-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .model-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .model-tag-pill {
      background: #f1f5f9;
      color: #334155;
      font-size: 0.8rem;
      padding: 5px 12px;
      border-radius: 6px;
      font-weight: 500;
      border: 1px solid #e2e8f0;
    }

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .hero-metric-item {
      background: #f8fafc;
      padding: 16px;
      border-radius: 10px;
      border: 1px solid #edf2f7;
    }

    .metric-value {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
    }

    .metric-label {
      font-size: 0.85rem;
      color: var(--text-muted);
      margin-top: 4px;
    }

    @keyframes pulseBtn {
      0% { box-shadow: 0 0 0 0 rgba(30, 91, 251, 0.4); }
      70% { box-shadow: 0 0 0 14px rgba(30, 91, 251, 0); }
      100% { box-shadow: 0 0 0 0 rgba(30, 91, 251, 0); }
    }

    /* 数据指标栏 */
    .metrics-bar-section {
      background: #ffffff;
      padding: 40px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .metrics-bar-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }

    .metrics-bar-box h3 {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .metrics-bar-box h3 span {
      color: var(--primary);
      font-size: 1.4rem;
    }

    .metrics-bar-box p {
      font-size: 0.95rem;
      color: var(--text-sub);
    }

    /* 公共 Section 基础设置 */
    section.page-section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .bg-light {
      background-color: #f8fafc;
    }

    .bg-white {
      background-color: #ffffff;
    }

    /* 关于我们 & 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .intro-content h3 {
      font-size: 1.7rem;
      font-weight: 700;
      margin-bottom: 18px;
      line-height: 1.4;
    }

    .intro-content p {
      color: var(--text-sub);
      margin-bottom: 16px;
      font-size: 1rem;
      line-height: 1.75;
    }

    .intro-pillars {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .intro-pillar-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: 10px;
      box-shadow: var(--shadow-sm);
    }

    .intro-pillar-card h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .intro-pillar-card p {
      font-size: 0.85rem;
      color: var(--text-sub);
      margin-bottom: 0;
    }

    .media-card {
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-card-img-wrap {
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #f1f5f9;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.03);
    }

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

    /* AIGC 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      font-weight: 700;
    }

    .service-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

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

    .service-badge {
      align-self: flex-start;
      font-size: 0.78rem;
      background: #f1f5f9;
      color: var(--text-muted);
      padding: 4px 10px;
      border-radius: 4px;
    }

    /* 一站式制作场景 */
    .scenes-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scene-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 22px;
      transition: var(--transition);
    }

    .scene-box:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-sm);
    }

    .scene-box h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scene-box h4::before {
      content: "";
      width: 6px;
      height: 16px;
      background: var(--primary);
      border-radius: 3px;
      display: inline-block;
    }

    .scene-box p {
      font-size: 0.88rem;
      color: var(--text-sub);
      line-height: 1.55;
    }

    /* 行业方案展示 */
    .solution-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .solution-card {
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .solution-body {
      padding: 24px;
    }

    .solution-body h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .solution-body p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 16px;
    }

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

    .solution-tags span {
      background: var(--primary-light);
      color: var(--primary);
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
    }

    /* 标准制作流程 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 16px;
      text-align: center;
      position: relative;
    }

    .step-number {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-size: 1.1rem;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    .process-step h4 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .process-step p {
      font-size: 0.85rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-image-holder {
      aspect-ratio: 16 / 9;
      background: #e2e8f0;
      overflow: hidden;
    }

    .case-info {
      padding: 24px;
    }

    .case-info h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 10px;
    }

    .case-info p {
      font-size: 0.92rem;
      color: var(--text-sub);
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .case-meta {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-top: 12px;
      border-top: 1px solid var(--border-color);
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 对比评测表格与卡片 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #1e5bfb 0%, #0d42d3 100%);
      color: #ffffff;
      border-radius: 14px;
      padding: 30px;
      margin-bottom: 36px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-highlight-left h3 {
      font-size: 1.6rem;
      font-weight: 800;
      margin-bottom: 6px;
    }

    .eval-highlight-left p {
      font-size: 0.95rem;
      opacity: 0.9;
    }

    .eval-score-badge {
      background: rgba(255, 255, 255, 0.15);
      border: 1px solid rgba(255, 255, 255, 0.3);
      padding: 16px 28px;
      border-radius: 12px;
      text-align: right;
    }

    .eval-stars {
      color: #ffc107;
      font-size: 1.3rem;
      letter-spacing: 2px;
    }

    .eval-big-num {
      font-size: 2.2rem;
      font-weight: 900;
      line-height: 1.2;
    }

    .eval-big-num small {
      font-size: 1.1rem;
      font-weight: 500;
      opacity: 0.8;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .comparison-table .highlight-col {
      background: rgba(30, 91, 251, 0.03);
      color: var(--primary);
      font-weight: 600;
    }

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

    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      position: relative;
    }

    .pricing-card.featured {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
    }

    .pricing-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--accent);
      color: #ffffff;
      font-size: 0.78rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
    }

    .pricing-header h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .pricing-price {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin: 16px 0;
    }

    .pricing-price small {
      font-size: 0.9rem;
      font-weight: 400;
      color: var(--text-muted);
    }

    .pricing-features {
      list-style: none;
      margin-bottom: 24px;
      flex-grow: 1;
    }

    .pricing-features li {
      font-size: 0.9rem;
      color: var(--text-sub);
      padding: 8px 0;
      border-bottom: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .pricing-features li::before {
      content: "•";
      color: var(--primary);
      font-weight: bold;
    }

    /* 服务网络 & 加盟代理 */
    .partner-agent-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: center;
    }

    .agent-perks {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .perk-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 18px;
    }

    .perk-item h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 6px;
      font-weight: 700;
    }

    .perk-item p {
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    .agent-callout-card {
      background: #ffffff;
      border: 2px solid #d4e3fc;
      border-radius: 16px;
      padding: 32px;
      box-shadow: var(--shadow-md);
      text-align: center;
    }

    .agent-callout-card h3 {
      font-size: 1.4rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
    }

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

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .author-avatar-text {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .author-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    /* 需求匹配与表单 */
    .match-form-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: 16px;
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-info-side h3 {
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .form-info-side p {
      color: var(--text-sub);
      font-size: 0.95rem;
      line-height: 1.7;
      margin-bottom: 24px;
    }

    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 0.92rem;
    }

    .contact-info-list li {
      display: flex;
      align-items: center;
      gap: 10px;
      color: var(--text-main);
    }

    .contact-info-list strong {
      color: var(--text-sub);
      width: 90px;
    }

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

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

    .form-group label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
      background: #fcfdfe;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(30, 91, 251, 0.12);
      background: #ffffff;
    }

    .form-textarea {
      min-height: 110px;
      resize: vertical;
    }

    .btn-submit {
      background: var(--primary);
      color: #ffffff;
      border: none;
      padding: 13px;
      font-size: 1rem;
      font-weight: 700;
      border-radius: 8px;
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-submit:hover {
      background: var(--primary-hover);
      box-shadow: 0 4px 14px rgba(30, 91, 251, 0.3);
    }

    /* 常见问题 FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

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

    .faq-question::after {
      content: "+";
      font-size: 1.3rem;
      font-weight: 400;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-question::after {
      content: "−";
      transform: rotate(180deg);
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fafbfc;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      border-top-color: var(--border-color);
    }

    .faq-answer p {
      padding: 18px 22px;
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.7;
      margin: 0;
    }

    /* AI百科 & 行业资讯 */
    .knowledge-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .knowledge-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
    }

    .knowledge-box h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 16px;
      padding-bottom: 12px;
      border-bottom: 2px solid var(--primary-light);
    }

    .article-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-links-list li a {
      display: flex;
      justify-content: space-between;
      font-size: 0.92rem;
      color: var(--text-sub);
      padding: 6px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    .article-links-list li a:hover {
      color: var(--primary);
      transform: translateX(4px);
    }

    /* 友情链接与底部 */
    .links-bar {
      background: #ffffff;
      padding: 30px 0;
      border-top: 1px solid var(--border-color);
    }

    .links-wrapper {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 0.88rem;
    }

    .links-title {
      font-weight: 700;
      color: var(--text-main);
    }

    .links-wrapper a {
      color: var(--text-sub);
      padding: 4px 10px;
      background: #f1f5f9;
      border-radius: 4px;
    }

    .links-wrapper a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }

    footer.site-footer {
      background: #111827;
      color: #9ca3af;
      padding: 50px 0 24px;
      font-size: 0.9rem;
    }

    .footer-container {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      line-height: 1.6;
      margin-bottom: 10px;
    }

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

    .footer-links-list a {
      color: #9ca3af;
    }

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

    .footer-qr-wrap {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .footer-qr-img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      background: #ffffff;
      padding: 4px;
    }

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #6b7280;
    }

    /* 浮动客服入口 */
    .float-service-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: var(--primary);
      cursor: pointer;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-3px);
    }

    .float-qr-popover {
      display: none;
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 10px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
    }

    .float-btn:hover .float-qr-popover {
      display: block;
    }

    .float-qr-popover img {
      width: 100%;
      border-radius: 6px;
      margin-bottom: 6px;
    }

    .float-qr-popover span {
      font-size: 0.75rem;
      color: var(--text-main);
      display: block;
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .hero-wrapper {
        grid-template-columns: 1fr;
      }
      .services-grid,
      .scenes-grid,
      .solution-grid,
      .token-pricing-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-container {
        grid-template-columns: 1fr 1fr;
      }
      .match-form-wrapper {
        grid-template-columns: 1fr;
      }
      .metrics-bar-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
      }
      .partner-agent-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-sm);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 12px;
      }
      .mobile-menu-btn {
        display: block;
      }
      h1.hero-main-title {
        font-size: 1.8rem;
      }
      .services-grid,
      .scenes-grid,
      .solution-grid,
      .token-pricing-grid,
      .reviews-grid,
      .intro-grid,
      .case-grid,
      .knowledge-grid {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .footer-container {
        grid-template-columns: 1fr;
      }
    }