:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-card-glass: rgba(255, 255, 255, 0.9);
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --neon-cyan: #06b6d4;
      --neon-blue: #3b82f6;
      --neon-purple: #8b5cf6;
      --neon-pink: #ec4899;
      --neon-green: #10b981;
      --neon-amber: #f59e0b;
      --glow-cyan: 0 0 20px rgba(6, 182, 212, 0.25);
      --glow-blue: 0 0 20px rgba(59, 130, 246, 0.25);
      --glow-purple: 0 0 20px rgba(139, 92, 246, 0.25);
      --border-light: #e2e8f0;
      --border-neon: rgba(6, 182, 212, 0.4);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 15px;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 15% 10%, rgba(6, 182, 212, 0.08), transparent 30%),
        radial-gradient(circle at 85% 25%, rgba(139, 92, 246, 0.08), transparent 35%),
        radial-gradient(circle at 50% 60%, rgba(236, 72, 153, 0.05), transparent 40%),
        radial-gradient(circle at 80% 90%, rgba(16, 185, 129, 0.06), transparent 30%);
      background-attachment: fixed;
    }

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

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 4px 20px 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;
      flex-shrink: 0;
    }

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

    .brand-text {
      display: flex;
      flex-direction: column;
    }

    .brand-title {
      font-size: 18px;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: #0f172a;
    }

    .brand-badge {
      font-size: 11px;
      color: #0891b2;
      font-weight: 600;
    }

    .nav-wrapper {
      display: flex;
      align-items: center;
    }

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

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

    .nav-links a:hover {
      color: var(--neon-cyan);
      background: rgba(6, 182, 212, 0.08);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 18px;
      flex-shrink: 0;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-light);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      cursor: pointer;
      font-size: 14px;
      color: var(--text-main);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      font-size: 14px;
      padding: 10px 20px;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-neon-glow {
      background: linear-gradient(135deg, #06b6d4, #3b82f6);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(6, 182, 212, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.3);
    }

    .btn-neon-glow:hover {
      background: linear-gradient(135deg, #0891b2, #2563eb);
      box-shadow: 0 6px 22px rgba(6, 182, 212, 0.6);
      transform: translateY(-2px);
    }

    .btn-outline-neon {
      background: rgba(255, 255, 255, 0.8);
      border-color: #06b6d4;
      color: #0891b2;
    }

    .btn-outline-neon:hover {
      background: rgba(6, 182, 212, 0.1);
      color: #0e7490;
      transform: translateY(-2px);
    }

    .btn-lg {
      padding: 14px 32px;
      font-size: 16px;
    }

    /* Section 通用 */
    .section-spacing {
      padding-top: 80px;
      padding-bottom: 80px;
    }

    .section-alt {
      background: linear-gradient(180deg, rgba(241, 245, 249, 0.6) 0%, rgba(255, 255, 255, 0.8) 100%);
      border-top: 1px solid var(--border-light);
      border-bottom: 1px solid var(--border-light);
    }

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

    .section-eyebrow {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: #0891b2;
      background: rgba(6, 182, 212, 0.12);
      padding: 4px 14px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
      border: 1px solid rgba(6, 182, 212, 0.25);
      text-transform: uppercase;
      letter-spacing: 0.05em;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 Hero - 无图片 pure css */
    .hero-section {
      padding-top: 90px;
      padding-bottom: 90px;
      position: relative;
      overflow: hidden;
      background: radial-gradient(circle at 50% 20%, rgba(6, 182, 212, 0.12) 0%, rgba(248, 250, 252, 0) 70%);
    }

    .hero-content {
      text-align: center;
      max-width: 960px;
      margin: 0 auto;
    }

    .hero-tags {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 24px;
    }

    .neon-pill {
      font-size: 12px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      background: #ffffff;
      border: 1px solid rgba(6, 182, 212, 0.4);
      color: #0891b2;
      box-shadow: 0 2px 10px rgba(6, 182, 212, 0.12);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .neon-pill-pink {
      border-color: rgba(236, 72, 153, 0.4);
      color: #be185d;
      box-shadow: 0 2px 10px rgba(236, 72, 153, 0.12);
    }

    .hero-title {
      font-size: 44px;
      font-weight: 900;
      letter-spacing: -0.03em;
      line-height: 1.25;
      margin-bottom: 22px;
      color: #0f172a;
    }

    .hero-title span {
      background: linear-gradient(135deg, #0284c7 0%, #06b6d4 50%, #8b5cf6 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px auto;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

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

    .stat-card {
      background: #ffffff;
      border: 1px solid rgba(226, 232, 240, 0.9);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.04), 0 0 0 1px rgba(6, 182, 212, 0.1);
      position: relative;
      overflow: hidden;
      transition: var(--transition);
    }

    .stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #06b6d4, #8b5cf6);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 15px 30px rgba(6, 182, 212, 0.15);
      border-color: rgba(6, 182, 212, 0.4);
    }

    .stat-value {
      font-size: 32px;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 4px;
      line-height: 1.2;
    }

    .stat-value .neon-accent {
      color: #0891b2;
      font-size: 24px;
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-sub);
      font-weight: 500;
    }

    /* 平台矩阵与模型支持 */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-light);
      padding: 8px 18px;
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      color: #1e293b;
      box-shadow: 0 2px 8px rgba(0,0,0,0.02);
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .model-tag:hover {
      border-color: var(--neon-cyan);
      box-shadow: 0 4px 12px rgba(6, 182, 212, 0.18);
      transform: translateY(-2px);
      color: #0891b2;
    }

    .model-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #10b981;
    }

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

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 30px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }

    .feature-card::after {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: var(--radius-lg);
      padding: 2px;
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.4), rgba(139, 92, 246, 0.2), transparent);
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask-composite: xor;
      mask-composite: exclude;
      opacity: 0;
      transition: var(--transition);
      pointer-events: none;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 16px 36px rgba(15, 23, 42, 0.06);
    }

    .feature-card:hover::after {
      opacity: 1;
    }

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: linear-gradient(135deg, rgba(6, 182, 212, 0.15), rgba(59, 130, 246, 0.1));
      border: 1px solid rgba(6, 182, 212, 0.3);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 20px;
      color: #0891b2;
      flex-shrink: 0;
    }

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

    .feature-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .feature-points {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 6px;
      border-top: 1px dashed var(--border-light);
      padding-top: 14px;
    }

    .feature-points li {
      font-size: 12.5px;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .feature-points li::before {
      content: "•";
      color: #06b6d4;
      font-size: 16px;
      line-height: 1;
    }

    /* 场景矩阵列表 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .scenario-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 22px;
      transition: var(--transition);
    }

    .scenario-card:hover {
      border-color: rgba(6, 182, 212, 0.5);
      box-shadow: 0 8px 24px rgba(6, 182, 212, 0.12);
      transform: translateY(-3px);
    }

    .scenario-badge {
      font-size: 11px;
      font-weight: 700;
      color: #8b5cf6;
      background: rgba(139, 92, 246, 0.1);
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      display: inline-block;
      margin-bottom: 10px;
    }

    .scenario-title {
      font-size: 16px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }

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

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

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 26px 20px;
      text-align: center;
      position: relative;
      transition: var(--transition);
    }

    .step-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
      border-color: #06b6d4;
    }

    .step-num {
      width: 42px;
      height: 42px;
      margin: 0 auto 16px auto;
      border-radius: 50%;
      background: linear-gradient(135deg, #06b6d4, #3b82f6);
      color: #ffffff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
      box-shadow: 0 4px 12px rgba(6, 182, 212, 0.3);
    }

    .step-title {
      font-size: 17px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }

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

    /* 案例图片展示 */
    .media-gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      align-items: stretch;
      margin-top: 30px;
    }

    .media-banner-col {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: 0 4px 20px rgba(0,0,0,0.03);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: 0 12px 32px rgba(0,0,0,0.08);
      border-color: rgba(6, 182, 212, 0.4);
    }

    .media-img-wrapper {
      width: 100%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }

    .media-info {
      padding: 16px 20px;
    }

    .media-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 4px;
    }

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

    /* 对比评测板块 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #ffffff, #f0fdfa);
      border: 2px solid rgba(6, 182, 212, 0.5);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: 0 10px 30px rgba(6, 182, 212, 0.1);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-area {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-circle {
      width: 80px;
      height: 80px;
      border-radius: 50%;
      background: linear-gradient(135deg, #06b6d4, #3b82f6);
      color: #ffffff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 26px;
      box-shadow: 0 4px 20px rgba(6, 182, 212, 0.4);
      line-height: 1;
    }

    .score-circle span {
      font-size: 11px;
      font-weight: 500;
      opacity: 0.9;
      margin-top: 2px;
    }

    .score-meta h3 {
      font-size: 20px;
      font-weight: 800;
      color: #0f172a;
      margin-bottom: 4px;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 16px;
      letter-spacing: 2px;
    }

    .comparison-table-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.03);
    }

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

    .comparison-table th, 
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      font-size: 14px;
    }

    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #1e293b;
    }

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

    .comparison-table .col-highlight {
      background: rgba(6, 182, 212, 0.04);
      font-weight: 600;
      color: #0891b2;
      border-left: 1px solid rgba(6, 182, 212, 0.2);
      border-right: 1px solid rgba(6, 182, 212, 0.2);
    }

    .comparison-table th.col-highlight {
      background: rgba(6, 182, 212, 0.1);
      color: #0e7490;
    }

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

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: 0 4px 16px rgba(0,0,0,0.02);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

    .testimonial-card:hover {
      border-color: rgba(6, 182, 212, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 12px 28px rgba(6, 182, 212, 0.1);
    }

    .testimonial-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

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

    .user-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #06b6d4, #8b5cf6);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      flex-shrink: 0;
    }

    .user-name {
      font-size: 14px;
      font-weight: 700;
      color: #0f172a;
    }

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

    /* FAQ 折叠 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-item.active {
      border-color: var(--neon-cyan);
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.08);
    }

    .faq-header {
      padding: 18px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
      font-weight: 600;
      font-size: 15px;
      color: #0f172a;
      transition: var(--transition);
    }

    .faq-header:hover {
      color: #0891b2;
      background: #f8fafc;
    }

    .faq-icon {
      font-size: 18px;
      color: #0891b2;
      transition: transform 0.25s ease;
    }

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

    .faq-body {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .faq-item.active .faq-body {
      padding-bottom: 20px;
      max-height: 300px;
    }

    /* 需求表单与联系我们 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 30px;
      align-items: flex-start;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: 0 6px 24px rgba(0,0,0,0.03);
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }

    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background: rgba(6, 182, 212, 0.1);
      color: #0891b2;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }

    .contact-text h5 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 2px;
    }

    .contact-text p {
      font-size: 13.5px;
      color: var(--text-muted);
    }

    .qr-card-box {
      margin-top: 20px;
      padding: 16px;
      border: 1px dashed rgba(6, 182, 212, 0.4);
      border-radius: var(--radius-md);
      background: rgba(6, 182, 212, 0.02);
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-card-box img {
      width: 90px;
      height: 90px;
      object-fit: cover;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.04);
      position: relative;
    }

    .form-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, #06b6d4, #3b82f6, #ec4899);
      border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

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

    .form-label {
      display: block;
      font-size: 13.5px;
      font-weight: 600;
      color: #1e293b;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      background: #f8fafc;
      color: #0f172a;
      transition: var(--transition);
      outline: none;
    }

    .form-control:focus {
      background: #ffffff;
      border-color: #06b6d4;
      box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
    }

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

    /* 行业资讯与文章 */
    .article-list-box {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 24px 30px;
      box-shadow: 0 4px 16px rgba(0,0,0,0.02);
    }

    .article-item {
      padding: 12px 0;
      border-bottom: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-item:last-child {
      border-bottom: none;
    }

    .article-item a {
      font-size: 14.5px;
      font-weight: 500;
      color: var(--text-main);
    }

    .article-item a:hover {
      color: #0891b2;
    }

    /* 页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding-top: 60px;
      padding-bottom: 30px;
      border-top: 1px solid #1e293b;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 18px;
      color: #ffffff;
      margin-bottom: 12px;
      font-weight: 700;
    }

    .footer-brand p {
      font-size: 13.5px;
      line-height: 1.6;
      color: #94a3b8;
      max-width: 320px;
    }

    .footer-col h5 {
      font-size: 15px;
      color: #f1f5f9;
      margin-bottom: 14px;
      font-weight: 600;
    }

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

    .footer-links a {
      font-size: 13.5px;
      color: #94a3b8;
    }

    .footer-links a:hover {
      color: #38bdf8;
    }

    .friend-links-bar {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }

    .friend-links-bar span {
      font-size: 13px;
      color: #cbd5e1;
      font-weight: 600;
    }

    .friend-links-bar a {
      font-size: 13px;
      color: #64748b;
    }

    .friend-links-bar a:hover {
      color: #38bdf8;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
    }

    /* 浮动客服 */
    .floating-service {
      position: fixed;
      right: 20px;
      bottom: 40px;
      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-light);
      box-shadow: 0 4px 16px rgba(0,0,0,0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #0891b2;
      font-size: 18px;
      transition: var(--transition);
      text-decoration: none;
    }

    .float-btn:hover {
      background: #0891b2;
      color: #ffffff;
      transform: scale(1.08);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 34px;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .feature-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .testimonial-grid {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
      .media-gallery-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .header-inner {
        position: relative;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-actions {
        display: none;
      }
      .hero-title {
        font-size: 28px;
      }
      .feature-grid {
        grid-template-columns: 1fr;
      }
      .scenario-grid {
        grid-template-columns: 1fr;
      }
      .process-steps {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        flex-direction: column;
        align-items: flex-start;
      }
    }