:root {
      --bg-main: #f8fafc;
      --bg-surface: #ffffff;
      --bg-soft: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --primary: #0284c7;
      --primary-hover: #0369a1;
      --neon-cyan: #06b6d4;
      --neon-purple: #8b5cf6;
      --neon-lime: #10b981;
      --neon-orange: #f59e0b;
      --neon-gradient: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
      --neon-border: linear-gradient(90deg, #06b6d4, #8b5cf6, #10b981);
      --border-color: #e2e8f0;
      --border-glow: rgba(6, 182, 212, 0.25);
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-xl: 24px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      background-image: 
        radial-gradient(circle at 10% 20%, rgba(6, 182, 212, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(16, 185, 129, 0.04) 0%, transparent 50%);
      background-attachment: fixed;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

    ul, ol {
      list-style: none;
    }

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

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

    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-title-wrap {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px auto;
    }

    .badge-neon {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 5px 14px;
      border-radius: 9999px;
      background: #eff6ff;
      border: 1px solid #bfdbfe;
      color: #1d4ed8;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
      box-shadow: 0 0 12px rgba(59, 130, 246, 0.15);
    }

    .badge-neon::before {
      content: "";
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: #2563eb;
      box-shadow: 0 0 8px #3b82f6;
    }

    .section-h2 {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.5px;
    }

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

    .card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
      position: relative;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(6, 182, 212, 0.4);
    }

    /* 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);
    }

    .nav-bar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

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

    .brand-area .ai-page-logo {
      height: 38px;
      width: auto;
    }

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      background: var(--neon-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: 0.5px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: #0284c7;
      background: #f0f9ff;
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.2s ease;
      white-space: nowrap;
    }

    .btn-neon-primary {
      background: var(--neon-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(6, 182, 212, 0.35);
    }

    .btn-neon-primary:hover {
      opacity: 0.95;
      box-shadow: 0 6px 20px rgba(139, 92, 246, 0.45);
      transform: translateY(-1px);
    }

    .btn-neon-outline {
      border: 1px solid #0284c7;
      color: #0284c7;
      background: #f0f9ff;
    }

    .btn-neon-outline:hover {
      background: #e0f2fe;
      border-color: #0369a1;
      color: #0369a1;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px;
      border-radius: var(--radius-sm);
      cursor: pointer;
    }

    /* Hero 首屏 - 纯 CSS / 几何构件 / 绝无图片 */
    .hero-section {
      padding: 70px 0 60px 0;
      position: relative;
      overflow: hidden;
      background: linear-gradient(180deg, rgba(255, 255, 255, 0.8) 0%, rgba(240, 249, 255, 0.6) 100%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-inner {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #bae6fd;
      border-radius: 9999px;
      font-size: 14px;
      font-weight: 700;
      color: #0369a1;
      box-shadow: 0 2px 10px rgba(6, 182, 212, 0.15);
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 38px;
      line-height: 1.25;
      font-weight: 900;
      color: #0f172a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: var(--neon-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.8;
      max-width: 780px;
      margin: 0 auto 32px auto;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .btn-hero-main {
      padding: 14px 34px;
      font-size: 16px;
      border-radius: 10px;
      font-weight: 700;
      background: var(--neon-gradient);
      color: #ffffff;
      box-shadow: 0 8px 24px rgba(6, 182, 212, 0.4);
      letter-spacing: 0.5px;
    }

    .btn-hero-main:hover {
      box-shadow: 0 10px 28px rgba(139, 92, 246, 0.5);
      transform: translateY(-2px);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 10px;
    }

    .metric-box {
      background: #ffffff;
      border: 1px solid #e0f2fe;
      border-radius: var(--radius-md);
      padding: 18px 12px;
      box-shadow: 0 4px 12px rgba(2, 132, 199, 0.06);
    }

    .metric-number {
      font-size: 26px;
      font-weight: 800;
      color: #0284c7;
      line-height: 1.2;
    }

    .metric-label {
      font-size: 13px;
      color: var(--text-light);
      margin-top: 4px;
      font-weight: 500;
    }

    /* 模型墙跑马灯条 */
    .model-ticker-section {
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      padding: 16px 0;
      overflow: hidden;
    }

    .ticker-title {
      font-size: 13px;
      color: var(--text-light);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 10px;
      text-align: center;
      font-weight: 700;
    }

    .ticker-wrap {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px 10px;
    }

    .ticker-tag {
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 6px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      color: #334155;
    }

    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      align-items: center;
    }

    .intro-content p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.8;
    }

    .feature-check-list {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 24px;
    }

    .feature-check-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      font-weight: 600;
      color: #1e293b;
    }

    .check-icon {
      width: 20px;
      height: 20px;
      border-radius: 50%;
      background: #dcfce7;
      color: #16a34a;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
      flex-shrink: 0;
      margin-top: 2px;
    }

    .intro-showcase {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-md);
    }

    .showcase-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 14px;
      margin-bottom: 16px;
    }

    .showcase-dots {
      display: flex;
      gap: 6px;
    }

    .dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
    }

    .dot-red { background: #ef4444; }
    .dot-yellow { background: #f59e0b; }
    .dot-green { background: #10b981; }

    /* 服务网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .service-card {
      border-top: 3px solid transparent;
      background: #ffffff;
    }

    .service-card:hover {
      border-top-color: #06b6d4;
    }

    .service-badge {
      font-size: 12px;
      padding: 3px 8px;
      border-radius: 4px;
      background: #f1f5f9;
      color: #475569;
      display: inline-block;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 8px;
    }

    .service-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 一站式制作场景 */
    .pipeline-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
    }

    .pipeline-item {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .pipeline-step {
      font-size: 11px;
      font-weight: 700;
      color: #0284c7;
      background: #e0f2fe;
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 10px;
    }

    .pipeline-item h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #0f172a;
    }

    .pipeline-item p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测模块 */
    .compare-container {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      overflow: hidden;
      box-shadow: var(--shadow-md);
    }

    .rating-banner {
      background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
      color: #ffffff;
      padding: 24px 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-score-box {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .score-num {
      font-size: 46px;
      font-weight: 900;
      color: #38bdf8;
      line-height: 1;
    }

    .score-max {
      font-size: 18px;
      color: #94a3b8;
    }

    .stars-box {
      color: #fbbf24;
      font-size: 20px;
      letter-spacing: 2px;
      margin-top: 4px;
    }

    .rating-meta h3 {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 4px;
      color: #ffffff;
    }

    .rating-meta p {
      font-size: 14px;
      color: #cbd5e1;
    }

    .compare-table-wrap {
      overflow-x: auto;
      padding: 0;
    }

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

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

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #334155;
    }

    .compare-table th.highlight-col,
    .compare-table td.highlight-col {
      background: rgba(2, 132, 199, 0.04);
      font-weight: 600;
      color: #0284c7;
      border-left: 2px solid #38bdf8;
      border-right: 2px solid #38bdf8;
    }

    .tag-strong {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      background: #dcfce7;
      color: #15803d;
      font-size: 12px;
      font-weight: 700;
    }

    /* Token 比价 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      transition: all 0.2s ease;
    }

    .token-card:hover {
      border-color: #06b6d4;
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .token-name {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .token-price {
      font-size: 22px;
      font-weight: 800;
      color: #0284c7;
      margin-bottom: 4px;
    }

    .token-tip {
      font-size: 12px;
      color: var(--text-light);
    }

    /* 案例中心 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.3s ease;
    }

    .case-card:hover .case-img-wrap img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 20px;
    }

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

    .case-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 客户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      position: relative;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #0284c7, #8b5cf6);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .user-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
    }

    .user-info span {
      font-size: 12px;
      color: var(--text-light);
    }

    .review-content {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* FAQ 折叠 */
    .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: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s ease;
    }

    .faq-item.active {
      border-color: #0284c7;
    }

    .faq-question {
      padding: 18px 24px;
      font-size: 16px;
      font-weight: 700;
      color: #0f172a;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }

    .faq-icon {
      font-size: 18px;
      color: #0284c7;
      transition: transform 0.2s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 18px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px dashed #e2e8f0;
      padding-top: 12px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    /* 表单与联系模块 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-xl);
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

    .contact-side-info h3 {
      font-size: 24px;
      font-weight: 800;
      margin-bottom: 12px;
      color: #0f172a;
    }

    .contact-side-info p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .qr-card {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px;
      display: flex;
      align-items: center;
      gap: 16px;
      margin-bottom: 20px;
    }

    .qr-card img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      border: 1px solid #e2e8f0;
    }

    .qr-text h5 {
      font-size: 15px;
      font-weight: 700;
      color: #0f172a;
    }

    .qr-text p {
      font-size: 12px;
      color: var(--text-light);
      margin-bottom: 0;
    }

    .contact-meta-list {
      font-size: 14px;
      color: #334155;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

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

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: #334155;
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      font-size: 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      background: #ffffff;
      color: #0f172a;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: #0284c7;
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
    }

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

    /* 行业资讯与文章 */
    .article-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
    }

    .article-links {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-top: 16px;
    }

    .article-link-item {
      padding: 10px 14px;
      border-radius: var(--radius-sm);
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      font-size: 14px;
      color: #0284c7;
      font-weight: 500;
      display: block;
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }

    .article-link-item:hover {
      background: #e0f2fe;
      border-color: #bae6fd;
    }

    /* 友情链接与底栏 */
    .footer-section {
      background: #0f172a;
      color: #cbd5e1;
      padding: 50px 0 30px 0;
      border-top: 1px solid #1e293b;
    }

    .footer-links-bar {
      border-bottom: 1px solid #1e293b;
      padding-bottom: 24px;
      margin-bottom: 24px;
      font-size: 13px;
    }

    .footer-links-bar span {
      color: #94a3b8;
      font-weight: 700;
      margin-right: 12px;
    }

    .footer-links-bar a {
      color: #94a3b8;
      margin-right: 16px;
      display: inline-block;
      margin-bottom: 6px;
    }

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

    .footer-bottom {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
      color: #94a3b8;
    }

    .footer-brand-txt {
      font-weight: 700;
      color: #ffffff;
    }

    /* 浮动客服 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 990;
      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: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: #0284c7;
      font-size: 20px;
      transition: transform 0.2s ease;
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: #0284c7;
      color: #ffffff;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .services-grid,
      .case-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .pipeline-grid,
      .token-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .intro-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 28px;
      }
      .section-h2 {
        font-size: 26px;
      }
      .services-grid,
      .case-grid,
      .reviews-grid,
      .pipeline-grid,
      .token-grid,
      .article-links {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
    }