:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --primary: #4f46e5;
      --primary-light: #6366f1;
      --neon-cyan: #06b6d4;
      --neon-magenta: #ec4899;
      --neon-amber: #f59e0b;
      --border-color: #e2e8f0;
      --border-glow: rgba(79, 70, 229, 0.2);
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.07), 0 2px 4px -2px rgba(0,0,0,0.05);
      --shadow-neon: 0 10px 25px -5px rgba(79, 70, 229, 0.15), 0 8px 10px -6px rgba(236, 72, 153, 0.1);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(236, 72, 153, 0.05) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(6, 182, 212, 0.04) 0px, transparent 50%);
      background-attachment: fixed;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      font-weight: 800;
      font-size: 1.35rem;
      color: var(--text-main);
    }

    .brand-logo .ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }

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

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

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

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.06);
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 16px;
    }

    .mobile-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 按钮通用 */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
      gap: 8px;
    }

    .btn-neon {
      background: linear-gradient(135deg, var(--primary), #7c3aed);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(79, 70, 229, 0.3);
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
      color: #ffffff;
    }

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

    .btn-outline:hover {
      background: rgba(79, 70, 229, 0.05);
      border-color: var(--primary-light);
    }

    .btn-glow-alt {
      background: linear-gradient(135deg, var(--neon-cyan), var(--primary));
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
    }

    .btn-glow-alt:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
      color: #ffffff;
    }

    /* 首屏纯文字与几何美化设计 - 严禁出现图片 */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
      background: linear-gradient(180deg, rgba(255,255,255,0.8) 0%, rgba(248,250,252,0.95) 100%);
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: rgba(79, 70, 229, 0.08);
      border: 1px solid rgba(79, 70, 229, 0.2);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
    }

    .badge-pill .pulse-dot {
      width: 8px;
      height: 8px;
      background: var(--neon-magenta);
      border-radius: 50%;
      box-shadow: 0 0 8px var(--neon-magenta);
      animation: pulseAnim 2s infinite;
    }

    @keyframes pulseAnim {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.3); }
    }

    .hero-title {
      font-size: 2.85rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.02em;
    }

    .hero-title span {
      background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

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

    .hero-actions .btn {
      padding: 14px 32px;
      font-size: 1.05rem;
    }

    .hero-highlights {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }

    .hl-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
      position: relative;
    }

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

    .hl-box .val {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .hl-box .desc {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 区域通用规范 */
    .section-block {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

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

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--neon-magenta);
      letter-spacing: 0.08em;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.01em;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* 平台综合介绍 */
    .platform-features {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
      position: relative;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      border-color: var(--neon-cyan);
      box-shadow: var(--shadow-neon);
    }

    .feature-icon-bar {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(236, 72, 153, 0.1));
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
    }

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

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

    /* 模型矩阵胶囊云 */
    .model-capsules {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 36px;
    }

    .capsule-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 18px;
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .capsule-chip:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: scale(1.05);
      box-shadow: 0 4px 12px rgba(79, 70, 229, 0.15);
    }

    /* 场景矩阵服务卡片 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .scenario-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .scenario-box:hover {
      border-color: var(--neon-magenta);
      box-shadow: var(--shadow-neon);
      transform: translateY(-3px);
    }

    .scenario-box h4 {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .scenario-box p {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .scenario-tag {
      font-size: 0.75rem;
      background: rgba(6, 182, 212, 0.1);
      color: #0891b2;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      align-self: flex-start;
      font-weight: 600;
    }

    /* 图像展示区域 */
    .gallery-showcase {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }

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

    .media-card .img-box {
      width: 100%;
      overflow: hidden;
      background: #e2e8f0;
      aspect-ratio: 16 / 9;
    }

    .media-card .img-box.square {
      aspect-ratio: 1 / 1;
    }

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

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

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

    .media-card .info h4 {
      font-size: 1.1rem;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .media-card .info p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 横向素材矩阵展示 */
    .banner-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

    .banner-grid-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }

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

    /* 流程图步进器 */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--neon-magenta));
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .step-item h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

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

    /* 对比评测表格 */
    .rating-banner {
      background: linear-gradient(135deg, #1e1b4b, #312e81);
      color: #ffffff;
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: 0 10px 25px rgba(30, 27, 75, 0.2);
    }

    .rating-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-circle {
      font-size: 2.2rem;
      font-weight: 900;
      color: #38bdf8;
      border: 3px solid #38bdf8;
      width: 80px;
      height: 80px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }

    .eval-table th,
    .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .eval-table th {
      background: #f1f5f9;
      font-weight: 700;
      color: var(--text-main);
    }

    .eval-table tr:hover td {
      background: #f8fafc;
    }

    .eval-table .highlight-col {
      background: rgba(79, 70, 229, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

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

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

    .review-stars {
      color: var(--neon-amber);
      margin-bottom: 12px;
      letter-spacing: 2px;
    }

    .review-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

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

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--neon-cyan), var(--primary));
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: #ffffff;
    }

    .reviewer-meta h5 {
      font-size: 0.95rem;
      color: var(--text-main);
    }

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

    /* 需求表单与代理加盟 */
    .form-agent-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: stretch;
    }

    .agent-card {
      background: linear-gradient(135deg, #f0fdf4 0%, #ffffff 100%);
      border: 1px solid #bbf7d0;
      border-radius: var(--radius-md);
      padding: 36px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .agent-card h3 {
      font-size: 1.6rem;
      color: #166534;
      margin-bottom: 12px;
    }

    .agent-card ul {
      list-style: none;
      margin: 20px 0;
    }

    .agent-card ul li {
      padding: 8px 0;
      color: #374151;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .agent-card ul li::before {
      content: "✔";
      color: #16a34a;
      font-weight: bold;
    }

    .form-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 16px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #fafafa;
      transition: var(--transition);
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 700;
      color: var(--text-main);
      background: #ffffff;
    }

    .faq-question .indicator {
      font-size: 1.25rem;
      transition: transform 0.3s;
      color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
      background: #f8fafc;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-item.open .faq-answer {
      padding: 16px 24px 20px;
      max-height: 300px;
    }

    .faq-item.open .indicator {
      transform: rotate(45deg);
    }

    /* 文章及知识库 */
    .articles-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

    .article-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .article-list {
      list-style: none;
    }

    .article-list li {
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-color);
    }

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

    .article-list a {
      text-decoration: none;
      color: var(--text-muted);
      transition: var(--transition);
      display: flex;
      justify-content: space-between;
      font-size: 0.95rem;
    }

    .article-list a:hover {
      color: var(--primary);
      padding-left: 4px;
    }

    /* 底部专属统一 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .footer-col p,
    .footer-col li {
      color: var(--text-muted);
      font-size: 0.9rem;
      line-height: 1.8;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col a {
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-col a:hover {
      color: var(--primary);
    }

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

    .qr-box img {
      width: 110px;
      height: 110px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      display: block;
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .footer-links-inline {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    /* 浮动联系挂件 */
    .floating-widget {
      position: fixed;
      right: 24px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

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

    /* 响应式样式 */
    @media (max-width: 1024px) {
      .hero-highlights {
        grid-template-columns: repeat(2, 1fr);
      }
      .platform-features,
      .scenario-grid,
      .workflow-steps,
      .reviews-grid,
      .banner-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .gallery-showcase {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 24px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform 0.3s ease-in-out;
        z-index: 999;
      }
      .nav-menu.active {
        transform: translateY(0);
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links a {
        display: block;
        padding: 10px 0;
        width: 100%;
      }
      .nav-cta {
        margin: 16px 0 0;
        width: 100%;
        justify-content: flex-start;
      }
      .hero-title {
        font-size: 2rem;
      }
      .hero-highlights,
      .platform-features,
      .scenario-grid,
      .workflow-steps,
      .reviews-grid,
      .form-agent-wrapper,
      .articles-grid,
      .banner-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
    }