:root {
      --primary: #059669;
      --primary-bright: #10b981;
      --primary-light: #ecfdf5;
      --primary-hover: #047857;
      --accent-lime: #84cc16;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-sub: #64748b;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --border-focus: #10b981;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 12px rgba(16, 185, 129, 0.08);
      --shadow-lg: 0 12px 30px rgba(16, 185, 129, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition-smooth: all 0.25s 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, "Noto Sans", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .logo-img-box {
      width: 140px;
      display: flex;
      align-items: center;
    }

    .logo-img-box img {
      max-height: 44px;
      width: auto;
      object-fit: contain;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      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-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 50px;
      background: linear-gradient(135deg, #10b981 0%, #059669 100%);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
    }

    .btn-portal:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 6px 10px;
      font-size: 1.25rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* 区域通用规范 */
    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid rgba(226, 232, 240, 0.7);
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 46px;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid rgba(16, 185, 129, 0.2);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 首屏 HERO */
    .hero-section {
      background: radial-gradient(circle at 50% 0%, #ecfdf5 0%, #f8fafc 70%);
      padding: 80px 0 65px;
      text-align: center;
      position: relative;
    }

    .hero-h1 {
      font-size: 2.7rem;
      font-weight: 900;
      color: #064e3b;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-h1 span {
      background: linear-gradient(135deg, #059669 0%, #10b981 60%, #84cc16 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 32px;
    }

    .hero-cta-box {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 44px;
      flex-wrap: wrap;
    }

    .btn-main-primary {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      border-radius: 50px;
      background: linear-gradient(135deg, #10b981 0%, #047857 100%);
      color: #ffffff !important;
      box-shadow: 0 8px 24px rgba(16, 185, 129, 0.35);
      border: none;
      cursor: pointer;
    }

    .btn-main-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(16, 185, 129, 0.45);
    }

    .btn-main-outline {
      padding: 14px 30px;
      font-size: 1.05rem;
      font-weight: 600;
      border-radius: 50px;
      border: 2px solid #10b981;
      color: #065f46 !important;
      background-color: #ffffff;
      box-shadow: var(--shadow-sm);
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 980px;
      margin: 0 auto;
    }

    .stat-card {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(16, 185, 129, 0.15);
      box-shadow: var(--shadow-md);
      transition: var(--transition-smooth);
    }

    .stat-card:hover {
      transform: translateY(-3px);
      border-color: var(--primary-bright);
    }

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

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    /* 平台介绍 */
    .about-box {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-sm);
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 1.6rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.35;
    }

    .about-content p {
      color: var(--text-muted);
      margin-bottom: 20px;
      font-size: 0.98rem;
    }

    .about-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }

    .about-point-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #065f46;
    }

    .about-point-item::before {
      content: "✔";
      display: inline-block;
      width: 18px;
      height: 18px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      text-align: center;
      line-height: 18px;
      font-size: 11px;
    }

    .about-banner-wrap {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      background: #f1f5f9;
    }

    .about-banner-wrap img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* AIGC服务 & 场景矩阵 */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }

    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

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

    .service-card:hover {
      border-color: var(--primary-bright);
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }

    .service-header {
      margin-bottom: 12px;
    }

    .service-tag {
      font-size: 0.75rem;
      color: var(--primary);
      background: var(--primary-light);
      padding: 3px 8px;
      border-radius: 4px;
      font-weight: 600;
      display: inline-block;
      margin-bottom: 8px;
    }

    .service-name {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .service-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 模型支持标签云 */
    .model-pills-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 9px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid #cbd5e1;
      border-radius: 30px;
      padding: 6px 14px;
      font-size: 0.84rem;
      color: var(--text-muted);
      font-weight: 500;
      transition: var(--transition-smooth);
    }

    .model-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 流程步骤 */
    .flow-steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      position: relative;
    }

    .flow-step-card {
      background: #ffffff;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
    }

    .flow-number {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--primary-bright);
      opacity: 0.75;
      margin-bottom: 8px;
    }

    .flow-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

    /* 案例中心展示 */
    .case-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
    }

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

    .case-img-box {
      width: 100%;
      background: #f1f5f9;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }

    .case-img-box.square-box {
      aspect-ratio: 1 / 1;
      max-height: 280px;
    }

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

    .case-card:hover .case-img-box img {
      transform: scale(1.02);
    }

    .case-info {
      padding: 20px;
    }

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

    .case-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 对比评测 */
    .eval-highlight-box {
      background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 30px 40px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-num {
      font-size: 3.5rem;
      font-weight: 900;
      color: #a7f3d0;
      line-height: 1;
    }

    .eval-stars {
      color: #facc15;
      font-size: 1.3rem;
      letter-spacing: 2px;
      margin-top: 4px;
    }

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

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

    .compare-table th, 
    .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.92rem;
    }

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

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

    .compare-table td.brand-col {
      background-color: #f0fdf4;
      font-weight: 700;
      color: #065f46;
    }

    /* 需求匹配表单 & 联系 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
    }

    .form-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 34px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-group label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 11px 14px;
      font-size: 0.92rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      outline: none;
      transition: var(--transition-smooth);
      background-color: #fcfdfe;
    }

    .form-control:focus {
      border-color: var(--border-focus);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
      background-color: #ffffff;
    }

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

    .contact-info-card {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 34px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-methods {
      margin-bottom: 24px;
    }

    .method-row {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
      font-size: 0.95rem;
    }

    .method-label {
      color: var(--text-sub);
      width: 90px;
      font-weight: 500;
    }

    .method-val {
      color: var(--text-main);
      font-weight: 600;
    }

    .qr-showcase {
      display: flex;
      align-items: center;
      gap: 20px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }

    .qr-img-box {
      width: 104px;
      height: 104px;
      padding: 4px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
    }

    .qr-img-box img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .qr-tip h5 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .qr-tip p {
      font-size: 0.85rem;
      color: var(--text-sub);
    }

    /* FAQ 折叠面板 */
    .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: var(--transition-smooth);
    }

    .faq-item.active {
      border-color: var(--primary);
    }

    .faq-question {
      padding: 18px 22px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      color: var(--text-main);
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 22px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      max-height: 220px;
      padding-bottom: 18px;
    }

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

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

    .comment-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .comment-user {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .user-avatar-tag {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
    }

    .user-name {
      font-weight: 700;
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .user-role {
      font-size: 0.78rem;
      color: var(--text-sub);
    }

    /* 行业资讯 & 链接区 */
    .article-links-box {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 18px;
    }

    .article-item-link {
      display: inline-flex;
      align-items: center;
      background: #f8fafc;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: var(--radius-sm);
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .article-item-link:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 55px 0 25px;
      font-size: 0.88rem;
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    .footer-brand p {
      line-height: 1.6;
      max-width: 320px;
      font-size: 0.85rem;
    }

    .footer-col h5 {
      color: #f1f5f9;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 14px;
    }

    .footer-col ul li {
      margin-bottom: 8px;
    }

    .footer-col ul li a {
      color: #94a3b8;
    }

    .footer-col ul li a:hover {
      color: #10b981;
    }

    .footer-friend-links {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
    }

    .footer-friend-links span {
      color: #cbd5e1;
      font-weight: 600;
    }

    .footer-friend-links a {
      color: #94a3b8;
      font-size: 0.85rem;
    }

    .footer-friend-links a:hover {
      color: #10b981;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 0.8rem;
      color: #64748b;
    }

    /* 浮动组件 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary);
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-size: 1.1rem;
      transition: var(--transition-smooth);
    }

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

    /* 响应式断点控制 */
    @media (max-width: 1024px) {
      .hero-h1 {
        font-size: 2.2rem;
      }
      .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-3, .testimonial-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
      .about-box {
        grid-template-columns: 1fr;
      }
      .flow-steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-3, .card-grid-4, .testimonial-grid, .case-grid, .contact-grid {
        grid-template-columns: 1fr;
      }
      .flow-steps-grid {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .eval-highlight-box {
        text-align: center;
        justify-content: center;
      }
    }