:root {
      --primary: #00c068;
      --primary-dark: #009b53;
      --primary-light: #e8faf0;
      --primary-glow: rgba(0, 192, 104, 0.15);
      --accent: #10b981;
      --dark: #0f172a;
      --slate: #334155;
      --muted: #64748b;
      --bg: #f8fafc;
      --card-bg: #ffffff;
      --border: #e2e8f0;
      --radius: 12px;
      --shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 20px 30px -10px rgba(0, 192, 104, 0.2);
      --transition: all 0.25s ease-in-out;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg);
      color: var(--dark);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 50% 0%, #ecfdf5 0%, #f8fafc 40%, #f8fafc 100%);
      color: var(--dark);
      min-height: 100vh;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

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

    /* 统一主容器规范 */
    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border);
    }

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

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

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

    .brand-name {
      font-size: 20px;
      font-weight: 800;
      color: var(--dark);
      letter-spacing: -0.5px;
    }

    .brand-name span {
      color: var(--primary);
    }

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

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

    .nav-links li a {
      font-size: 14px;
      font-weight: 600;
      color: var(--slate);
      padding: 8px 12px;
      border-radius: 6px;
      display: inline-block;
    }

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

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

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

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(0, 192, 104, 0.35);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      box-shadow: 0 6px 20px rgba(0, 192, 104, 0.45);
      transform: translateY(-1px);
    }

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

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

    .btn-sm {
      padding: 6px 14px;
      font-size: 13px;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--dark);
    }

    /* 模块通用样式 */
    .section {
      padding: 80px 0;
      position: relative;
    }

    .section-title-wrap {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 12px;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-size: 12px;
      font-weight: 700;
      border-radius: 20px;
      text-transform: uppercase;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

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

    .section-desc {
      font-size: 15px;
      color: var(--muted);
      line-height: 1.7;
    }

    /* Hero 首屏 (无图设计，纯色/代码动效/数据面板) */
    .hero-section {
      padding: 70px 0 60px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #cbf4dc;
      border-radius: 30px;
      font-size: 13px;
      color: var(--primary-dark);
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: 0 4px 12px rgba(0, 192, 104, 0.08);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(0, 192, 104, 0.2);
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -1px;
    }

    .hero-title .highlight {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--slate);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .btn-glow {
      padding: 14px 32px;
      font-size: 16px;
      border-radius: 10px;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1080px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 24px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow);
      transition: var(--transition);
      text-align: center;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #a7f3d0;
    }

    .stat-value {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

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

    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .intro-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow);
    }

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

    .feature-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px;
      background: var(--bg);
      border-radius: 8px;
    }

    .feature-icon {
      font-size: 20px;
      color: var(--primary);
      line-height: 1;
    }

    .feature-text h4 {
      font-size: 14px;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 2px;
    }

    .feature-text p {
      font-size: 12px;
      color: var(--muted);
    }

    /* 聚合模型墙 */
    .models-stream {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid var(--border);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      color: var(--slate);
      box-shadow: 0 2px 5px rgba(0,0,0,0.02);
      transition: var(--transition);
    }

    .model-chip:hover {
      border-color: var(--primary);
      color: var(--primary-dark);
      background-color: var(--primary-light);
      transform: translateY(-2px);
    }

    /* 服务场景网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-box {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-box:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: #a7f3d0;
    }

    .service-tag {
      align-self: flex-start;
      font-size: 11px;
      font-weight: 700;
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 3px 8px;
      border-radius: 4px;
      margin-bottom: 14px;
    }

    .service-box h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--dark);
    }

    .service-box p {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .service-footer {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* 一站式制作与素材图展示 */
    .gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      align-items: stretch;
      margin-top: 30px;
    }

    .media-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow);
      display: flex;
      flex-direction: column;
    }

    .media-card-body {
      padding: 24px;
    }

    .media-card-body h3 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

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

    /* 对比评测模块 */
    .compare-wrap {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow);
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #00c068 0%, #009b53 100%);
      color: #ffffff;
      padding: 24px 32px;
      border-radius: 10px;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-left h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 4px;
    }

    .score-left p {
      font-size: 13px;
      opacity: 0.9;
    }

    .score-right {
      display: flex;
      align-items: baseline;
      gap: 6px;
    }

    .score-num {
      font-size: 44px;
      font-weight: 900;
      line-height: 1;
    }

    .score-total {
      font-size: 16px;
      opacity: 0.85;
    }

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

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

    .compare-table th {
      background: #f8fafc;
      color: var(--slate);
      font-weight: 700;
    }

    .compare-table td.highlight-col {
      background: #f0fdf4;
      font-weight: 600;
      color: var(--primary-dark);
    }

    .check-icon {
      color: var(--primary);
      font-weight: bold;
    }

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

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      position: relative;
      box-shadow: var(--shadow);
    }

    .step-number {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 800;
      border-radius: 50%;
      margin: 0 auto 16px;
      font-size: 16px;
    }

    .process-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .process-card p {
      font-size: 12px;
      color: var(--muted);
      line-height: 1.5;
    }

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

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

    .review-text {
      font-size: 13px;
      color: var(--slate);
      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);
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #dcfce7;
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 14px;
    }

    .reviewer-meta h5 {
      font-size: 14px;
      font-weight: 700;
      color: var(--dark);
    }

    .reviewer-meta span {
      font-size: 12px;
      color: var(--muted);
    }

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: 10px;
      overflow: hidden;
      box-shadow: 0 2px 6px rgba(0,0,0,0.02);
      transition: var(--transition);
    }

    .faq-header {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 15px;
      color: var(--dark);
      user-select: none;
    }

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

    .faq-toggle {
      font-size: 18px;
      font-weight: 400;
      color: var(--muted);
      transition: transform 0.2s ease;
    }

    .faq-body {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      font-size: 14px;
      color: var(--slate);
      line-height: 1.7;
    }

    .faq-item.active .faq-body {
      padding: 0 24px 20px;
      max-height: 300px;
    }

    .faq-item.active .faq-toggle {
      transform: rotate(45deg);
      color: var(--primary);
    }

    /* 智能需求匹配与联系我们表单 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow);
    }

    .contact-info h3 {
      font-size: 22px;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .contact-info p {
      font-size: 14px;
      color: var(--muted);
      line-height: 1.6;
      margin-bottom: 24px;
    }

    .contact-methods {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }

    .contact-line {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      font-weight: 600;
      color: var(--slate);
    }

    .qr-box {
      background: var(--bg);
      padding: 16px;
      border-radius: 8px;
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      max-width: 160px;
      border: 1px solid var(--border);
    }

    .qr-box img {
      width: 120px;
      height: 120px;
      object-fit: contain;
    }

    .qr-box span {
      font-size: 12px;
      font-weight: 600;
      color: var(--muted);
    }

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

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

    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: var(--slate);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border);
      border-radius: 8px;
      font-size: 14px;
      font-family: inherit;
      outline: none;
      transition: var(--transition);
      background: #ffffff;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px var(--primary-glow);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

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

    .article-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-tag-item {
      font-size: 13px;
      background: var(--bg);
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid var(--border);
      color: var(--slate);
    }

    .article-tag-item:hover {
      border-color: var(--primary);
      color: var(--primary-dark);
    }

    /* 友情链接与页脚 */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 24px;
      font-size: 13px;
      border-top: 1px solid #1e293b;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 18px;
      font-weight: 800;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 13px;
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 14px;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

    .friend-links-wrap {
      border-top: 1px solid #1e293b;
      padding: 20px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .friend-links-title {
      font-weight: 700;
      color: #cbd5e1;
    }

    .friend-links-wrap a {
      color: #94a3b8;
    }

    .friend-links-wrap a:hover {
      color: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      color: #64748b;
      font-size: 12px;
    }

    /* 悬浮工具条 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border);
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 18px;
      color: var(--dark);
      transition: var(--transition);
    }

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

    /* 响应式调整 */
    @media (max-width: 1024px) {
      .services-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid,
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-wrapper {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border);
        padding: 20px 24px;
        box-shadow: var(--shadow);
      }
      .nav-wrapper.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 30px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .hero-stats-grid,
      .services-grid,
      .gallery-grid,
      .intro-grid,
      .contact-grid,
      .process-grid,
      .reviews-grid,
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .intro-features {
        grid-template-columns: 1fr;
      }
      .score-banner {
        flex-direction: column;
        align-items: flex-start;
      }
      .compare-table {
        display: block;
        overflow-x: auto;
      }
    }