:root {
      --primary: #ff3366;
      --primary-dark: #d61a4c;
      --secondary: #6366f1;
      --accent-cyan: #00d2ff;
      --accent-yellow: #ffb703;
      --bg-light: #fbfbfd;
      --bg-card: #ffffff;
      --bg-soft: #f4f6fb;
      --text-main: #181925;
      --text-muted: #5c6275;
      --text-light: #8e95a5;
      --border-color: #e4e7f1;
      --shadow-sm: 0 4px 12px rgba(24, 25, 37, 0.05);
      --shadow-md: 0 10px 30px rgba(99, 102, 241, 0.08);
      --shadow-lg: 0 20px 40px rgba(255, 51, 102, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-family);
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(255, 51, 102, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 90% 60%, rgba(99, 102, 241, 0.04) 0%, transparent 45%),
        radial-gradient(circle at 50% 90%, rgba(0, 210, 255, 0.04) 0%, transparent 40%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    .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, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .brand-text {
      font-size: 1.25rem;
      font-weight: 800;
      background: linear-gradient(120deg, var(--primary), var(--secondary));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      display: block;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: rgba(255, 51, 102, 0.08);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-nav-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, var(--primary), #ff6b8b);
      border-radius: 50px;
      box-shadow: 0 4px 15px rgba(255, 51, 102, 0.35);
      border: none;
      cursor: pointer;
    }
    .btn-nav-portal:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(255, 51, 102, 0.45);
      color: #ffffff;
    }
    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .nav-toggle span {
      display: block;
      width: 24px;
      height: 3px;
      margin: 4px 0;
      background-color: var(--text-main);
      border-radius: 2px;
      transition: all 0.3s;
    }

    /* 模块通用样式 */
    .section-wrap {
      padding: 70px 0;
    }
    .section-head {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 16px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--secondary);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 50px;
      margin-bottom: 12px;
      text-transform: uppercase;
    }
    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* Hero 首屏 (无图) */
    .hero-section {
      padding: 70px 0 60px 0;
      position: relative;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }
    .hero-main-title {
      font-size: 2.75rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
      color: var(--text-main);
    }
    .hero-highlight {
      background: linear-gradient(135deg, var(--primary) 0%, #ff7b00 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtext {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 32px;
    }
    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .btn-main-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: linear-gradient(135deg, var(--primary) 0%, #ff1f5a 100%);
      color: #ffffff;
      font-size: 1.15rem;
      font-weight: 700;
      padding: 16px 36px;
      border-radius: 50px;
      box-shadow: 0 8px 25px rgba(255, 51, 102, 0.4);
      animation: pulseHover 3s infinite ease-in-out;
    }
    .btn-main-portal:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 12px 30px rgba(255, 51, 102, 0.5);
      color: #ffffff;
    }
    @keyframes pulseHover {
      0%, 100% { box-shadow: 0 8px 25px rgba(255, 51, 102, 0.4); }
      50% { box-shadow: 0 12px 35px rgba(255, 51, 102, 0.65); }
    }
    .btn-secondary-link {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 16px 32px;
      border-radius: 50px;
      background: #ffffff;
      color: var(--text-main);
      font-size: 1.05rem;
      font-weight: 700;
      border: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .btn-secondary-link:hover {
      border-color: var(--secondary);
      color: var(--secondary);
      transform: translateY(-2px);
    }
    .hero-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }
    .hero-pill {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      box-shadow: var(--shadow-sm);
    }
    .hero-pill svg {
      width: 14px;
      height: 14px;
      margin-right: 6px;
      fill: var(--primary);
    }

    /* 首屏纯CSS科技数据卡片容器 (不引入任何图) */
    .hero-visual-card {
      background: #ffffff;
      border: 1px solid rgba(99, 102, 241, 0.15);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }
    .visual-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 14px;
      border-bottom: 1px solid var(--border-color);
    }
    .visual-dots {
      display: flex;
      gap: 6px;
    }
    .dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }
    .dot-red { background: #ff5f56; }
    .dot-yellow { background: #ffbd2e; }
    .dot-green { background: #27c93f; }
    .visual-status {
      font-size: 0.85rem;
      font-weight: 700;
      color: #059669;
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .status-beacon {
      width: 8px;
      height: 8px;
      background-color: #059669;
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.2);
    }
    .metrics-stream {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .metric-row {
      background: var(--bg-soft);
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--primary);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .metric-row:nth-child(2) { border-left-color: var(--secondary); }
    .metric-row:nth-child(3) { border-left-color: var(--accent-cyan); }
    .metric-row:nth-child(4) { border-left-color: var(--accent-yellow); }
    .metric-meta h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .metric-meta p {
      font-size: 0.8rem;
      color: var(--text-light);
    }
    .metric-val {
      font-size: 1.15rem;
      font-weight: 800;
      color: var(--text-main);
    }

    /* 聚合模型展标云 */
    .model-cloud-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      padding: 30px 0;
    }
    .cloud-title {
      font-size: 0.95rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--text-light);
      margin-bottom: 20px;
      text-align: center;
    }
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }
    .model-tag {
      background: var(--bg-soft);
      color: var(--text-main);
      padding: 8px 16px;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 600;
      border: 1px solid var(--border-color);
      transition: all 0.25s;
    }
    .model-tag:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 平台核心介绍卡片 */
    .intro-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .intro-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
      position: relative;
    }
    .intro-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.4);
    }
    .intro-icon {
      width: 52px;
      height: 52px;
      border-radius: 14px;
      background: linear-gradient(135deg, rgba(255, 51, 102, 0.1), rgba(99, 102, 241, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
    }
    .intro-card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .intro-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* AIGC主打场景卡片 (潮色网格) */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
      gap: 24px;
    }
    .scene-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s ease;
    }
    .scene-card:hover {
      border-color: var(--primary);
      box-shadow: 0 12px 24px rgba(255, 51, 102, 0.08);
      transform: translateY(-4px);
    }
    .scene-top {
      display: flex;
      justify-content: space-between;
      align-items: flex-start;
      margin-bottom: 14px;
    }
    .scene-name {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .scene-tag {
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 20px;
      background: rgba(255, 51, 102, 0.1);
      color: var(--primary);
    }
    .scene-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 18px;
    }
    .scene-feature-list {
      list-style: none;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: auto;
    }
    .scene-feature-list li {
      font-size: 0.8rem;
      background: var(--bg-soft);
      padding: 4px 10px;
      border-radius: 6px;
      color: var(--text-main);
    }

    /* 案例展示区 (图文整合) */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 28px;
    }
    .case-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
    }
    .case-item:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-5px);
    }
    .case-media-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #e2e8f0;
      position: relative;
    }
    .case-media-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
      display: block;
    }
    .case-item:hover .case-media-wrap img {
      transform: scale(1.05);
    }
    .case-media-square {
      aspect-ratio: 1 / 1;
    }
    .case-content {
      padding: 24px;
    }
    .case-cat {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--secondary);
      text-transform: uppercase;
      margin-bottom: 8px;
    }
    .case-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .case-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 标准制作流程 (横向步骤) */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 24px;
      position: relative;
    }
    .step-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .step-number {
      font-size: 2.2rem;
      font-weight: 900;
      color: rgba(99, 102, 241, 0.15);
      line-height: 1;
      margin-bottom: 12px;
    }
    .step-box h3 {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .step-box p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 对比评测板块 */
    .review-summary-card {
      background: linear-gradient(135deg, #181925 0%, #2a2d45 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      margin-bottom: 40px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      box-shadow: var(--shadow-md);
    }
    .review-score-box {
      display: flex;
      align-items: center;
      gap: 24px;
    }
    .score-badge {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
      color: var(--accent-yellow);
    }
    .score-meta h4 {
      font-size: 1.35rem;
      font-weight: 700;
      margin-bottom: 6px;
      color: #ffffff;
    }
    .score-stars {
      color: #f59e0b;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }
    .review-action {
      display: flex;
      gap: 16px;
    }
    .compare-table-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
      min-width: 650px;
    }
    .compare-table th, 
    .compare-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .compare-table th {
      background: var(--bg-soft);
      font-weight: 700;
      color: var(--text-main);
    }
    .highlight-col {
      background: rgba(255, 51, 102, 0.03);
      color: var(--primary);
      font-weight: 700;
    }

    /* 客户真实评价 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .review-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .review-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 14px;
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
    }
    .reviewer-avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--secondary), var(--primary));
      display: flex;
      align-items: center;
      justify-content: center;
      color: #ffffff;
      font-weight: 700;
      font-size: 1rem;
    }
    .reviewer-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .reviewer-info p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 需求匹配与联系我们 (表单及客服) */
    .form-section-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
    }
    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: border-color 0.25s;
      background: var(--bg-soft);
      font-family: inherit;
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }
    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(255, 51, 102, 0.3);
      transition: all 0.3s;
    }
    .btn-submit:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(255, 51, 102, 0.45);
    }

    /* 客服与渠道卡片 */
    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 24px;
    }
    .contact-channel-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
    }
    .channel-icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: rgba(99, 102, 241, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--secondary);
      flex-shrink: 0;
    }
    .channel-detail h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .channel-detail p, 
    .channel-detail a {
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .channel-detail a:hover {
      color: var(--primary);
    }
    .qr-box-wrap {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      text-align: center;
    }
    .qr-box-wrap p {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }
    .kefu-qr-img {
      width: 140px;
      height: 140px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 4px;
      background: #ffffff;
      margin: 0 auto;
      display: block;
    }

    /* FAQ 手风琴 */
    .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-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      padding: 20px 24px;
      text-align: left;
      background: none;
      border: none;
      outline: none;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      transition: background 0.25s;
    }
    .faq-question:hover {
      background: var(--bg-soft);
    }
    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      color: var(--text-light);
      transition: transform 0.3s;
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: var(--bg-soft);
    }
    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
      color: var(--primary);
    }

    /* 行业资讯 / 最新文章列表 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      margin-bottom: 30px;
    }
    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.25s;
    }
    .article-card:hover {
      border-color: var(--secondary);
      transform: translateY(-3px);
    }
    .article-tag {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--secondary);
      margin-bottom: 8px;
    }
    .article-card h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
      line-height: 1.45;
    }
    .article-link {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      margin-top: auto;
    }

    /* 宣传图画廊展区 (Banner物料展示) */
    .banner-gallery-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 20px;
    }
    .banner-img-card {
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      background: #ffffff;
    }
    .banner-img-card .ai-page-image {
      width: 100%;
      height: 220px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .banner-img-card:hover .ai-page-image {
      transform: scale(1.03);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #12131c;
      color: #9499ad;
      padding: 60px 0 24px 0;
      border-top: 1px solid #232535;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-brand-title {
      font-size: 1.3rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 14px;
    }
    .footer-brand-desc {
      font-size: 0.9rem;
      line-height: 1.7;
      color: #9499ad;
    }
    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 18px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list li a {
      color: #9499ad;
      font-size: 0.9rem;
    }
    .footer-links-list li a:hover {
      color: #ffffff;
      padding-left: 4px;
    }
    .friend-links-box {
      border-top: 1px solid #232535;
      padding: 24px 0;
      margin-bottom: 24px;
    }
    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }
    .friend-links-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }
    .friend-links-group a {
      color: #9499ad;
      font-size: 0.85rem;
    }
    .friend-links-group a:hover {
      color: var(--accent-cyan);
    }
    .footer-bottom {
      border-top: 1px solid #232535;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #6c7287;
    }

    /* 浮动客服入口 & 返回顶部 */
    .floating-actions {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--text-main);
      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: all 0.3s;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }
    .float-btn-kefu {
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
    }
    .kefu-popover {
      display: none;
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 170px;
      text-align: center;
    }
    .float-btn-kefu:hover .kefu-popover {
      display: block;
    }
    .kefu-popover img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }
    .kefu-popover span {
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--text-main);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .form-section-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .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-toggle {
        display: block;
      }
    }
    @media (max-width: 600px) {
      .hero-main-title {
        font-size: 2.1rem;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .section-wrap {
        padding: 50px 0;
      }
      .review-summary-card {
        padding: 24px;
      }
    }