/* CSS Root & Base Reset */
    :root {
      --primary: #20c997; /* 薄荷绿 */
      --primary-dark: #0f5132; /* 深绿 */
      --primary-light: #e8f8f5; /* 极浅薄荷绿 */
      --secondary: #1abc9c;
      --dark: #2d3748;
      --gray-light: #f8f9fa;
      --gray-border: #e2e8f0;
      --text-muted: #718096;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
      --max-width: 1200px;
    }

    * {
      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;
      color: var(--dark);
      background-color: #ffffff;
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
    }

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

    ul {
      list-style: none;
    }

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

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Common Button */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      border-radius: 50px;
      font-size: 15px;
      font-weight: 600;
      cursor: pointer;
      transition: var(--transition);
      border: none;
    }

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

    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(32, 201, 151, 0.3);
    }

    .btn-outline {
      background-color: transparent;
      border: 2px solid var(--primary);
      color: var(--primary-dark);
    }

    .btn-outline:hover {
      background-color: var(--primary);
      color: #ffffff;
      transform: translateY(-2px);
    }

    /* Header & Navigation */
    header {
      position: sticky;
      top: 0;
      background-color: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
      z-index: 1000;
      border-bottom: 1px solid var(--primary-light);
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 80px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .ai-page-logo {
      height: 45px;
      width: auto;
    }

    .nav-menu {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--dark);
      padding: 8px 12px;
      border-radius: 4px;
    }

    .nav-link:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .mobile-menu-btn {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      z-index: 1001;
    }

    .mobile-menu-btn span {
      width: 25px;
      height: 3px;
      background-color: var(--dark);
      transition: var(--transition);
    }

    /* Section Styling */
    section {
      padding: 90px 0;
      border-bottom: 1px solid var(--gray-border);
    }

    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }

    .section-title h2 {
      font-size: 32px;
      color: var(--primary-dark);
      margin-bottom: 15px;
      position: relative;
      display: inline-block;
    }

    .section-title h2::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 50%;
      transform: translateX(-50%);
      width: 60px;
      height: 4px;
      background-color: var(--primary);
      border-radius: 2px;
    }

    .section-title p {
      color: var(--text-muted);
      font-size: 16px;
      max-width: 600px;
      margin: 0 auto;
    }

    /* Hero Section (No Image) */
    .hero-section {
      background: radial-gradient(circle at 80% 20%, var(--primary-light) 0%, #ffffff 80%);
      padding: 120px 0;
      position: relative;
      overflow: hidden;
      border-bottom: none;
    }

    .hero-content {
      max-width: 800px;
      margin: 0 auto;
      text-align: center;
    }

    .badge-promo {
      display: inline-block;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 25px;
      border: 1px solid var(--primary);
    }

    .hero-content h1 {
      font-size: 46px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 20px;
    }

    .hero-content p {
      font-size: 18px;
      color: var(--dark);
      margin-bottom: 40px;
      line-height: 1.8;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 20px;
      flex-wrap: wrap;
    }

    /* Stats Grid */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      margin-top: 60px;
    }

    .stat-card {
      background-color: #ffffff;
      border-radius: 16px;
      padding: 30px 20px;
      text-align: center;
      box-shadow: var(--shadow);
      border: 1px solid var(--primary-light);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .stat-num {
      font-size: 36px;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 5px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Platform Info (About Us) */
    .about-section {
      background-color: var(--gray-light);
    }

    .about-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 26px;
      color: var(--primary-dark);
      margin-bottom: 20px;
    }

    .about-text p {
      font-size: 16px;
      color: var(--dark);
      margin-bottom: 20px;
      line-height: 1.8;
    }

    .about-list {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 15px;
      margin-bottom: 30px;
    }

    .about-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 14px;
      font-weight: 500;
    }

    .about-item::before {
      content: '✓';
      color: var(--primary);
      font-weight: bold;
      font-size: 16px;
    }

    .about-image-wrapper {
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow);
      background-color: var(--primary-light);
    }

    /* Service Capabilties & Models Tag Cloud */
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 12px;
      max-width: 900px;
      margin: 40px auto 0;
    }

    .model-tag {
      background-color: var(--gray-light);
      border: 1px solid var(--gray-border);
      padding: 8px 18px;
      border-radius: 50px;
      font-size: 14px;
      font-weight: 500;
      color: var(--dark);
      transition: var(--transition);
    }

    .model-tag:hover {
      background-color: var(--primary-light);
      border-color: var(--primary);
      color: var(--primary-dark);
      transform: scale(1.05);
    }

    /* AIGC Production Grid */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .service-card {
      background-color: #ffffff;
      border: 1px solid var(--gray-border);
      border-radius: 16px;
      padding: 40px 30px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background-color: var(--primary);
      transform: scaleX(0);
      transition: var(--transition);
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: var(--primary-light);
    }

    .service-card:hover::before {
      transform: scaleX(1);
    }

    .service-icon {
      width: 50px;
      height: 50px;
      border-radius: 12px;
      background-color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      margin-bottom: 25px;
      color: var(--primary-dark);
    }

    .service-card h3 {
      font-size: 20px;
      margin-bottom: 15px;
      color: var(--dark);
    }

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

    /* Process Flow */
    .flow-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 30px;
      position: relative;
      margin-top: 40px;
    }

    .flow-step {
      text-align: center;
      position: relative;
    }

    .flow-step::after {
      content: '→';
      position: absolute;
      top: 30px;
      right: -25px;
      font-size: 24px;
      color: var(--primary);
      opacity: 0.5;
    }

    .flow-step:last-child::after {
      display: none;
    }

    .flow-num {
      width: 60px;
      height: 60px;
      border-radius: 50%;
      background-color: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      font-weight: 700;
      margin: 0 auto 20px;
      border: 4px solid var(--primary-light);
    }

    .flow-step h3 {
      font-size: 18px;
      margin-bottom: 10px;
    }

    .flow-step p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Tech Standard & Specs */
    .specs-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .spec-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .spec-card {
      background-color: var(--gray-light);
      border-left: 5px solid var(--primary);
      padding: 20px;
      border-radius: 0 12px 12px 0;
    }

    .spec-card h4 {
      font-size: 18px;
      margin-bottom: 8px;
      color: var(--primary-dark);
    }

    .spec-card p {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Cases & Industry Solutions */
    .cases-section {
      background-color: var(--gray-light);
    }

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

    .case-card {
      background-color: #ffffff;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--gray-border);
      transition: var(--transition);
    }

    .case-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }

    .case-img-container {
      position: relative;
      background-color: var(--primary-light);
      aspect-ratio: 16/9;
      overflow: hidden;
    }

    .case-img-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-body {
      padding: 30px;
    }

    .case-tag {
      display: inline-block;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 30px;
      margin-bottom: 15px;
    }

    .case-body h3 {
      font-size: 20px;
      margin-bottom: 10px;
      color: var(--dark);
    }

    .case-body p {
      color: var(--text-muted);
      font-size: 14px;
      margin-bottom: 20px;
    }

    /* Comparison Table & Price */
    .compare-container {
      background-color: #ffffff;
      border-radius: 16px;
      box-shadow: var(--shadow);
      overflow: hidden;
      border: 1px solid var(--gray-border);
      margin-bottom: 40px;
    }

    .compare-header {
      background-color: var(--primary-dark);
      color: #ffffff;
      padding: 40px;
      text-align: center;
    }

    .compare-score {
      font-size: 54px;
      font-weight: 800;
      color: var(--primary);
      margin: 15px 0;
    }

    .compare-stars {
      color: #ffb800;
      font-size: 24px;
      margin-bottom: 10px;
    }

    .table-responsive {
      overflow-x: auto;
    }

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

    th, td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--gray-border);
      font-size: 15px;
    }

    th {
      background-color: var(--gray-light);
      font-weight: 600;
    }

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

    .status-yes {
      color: var(--primary-dark);
      font-weight: bold;
    }

    .status-no {
      color: #e53e3e;
    }

    /* Training Section */
    .training-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .course-card {
      background-color: #ffffff;
      border: 1px solid var(--gray-border);
      border-radius: 16px;
      padding: 30px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .course-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-hover);
    }

    .course-badge {
      align-self: flex-start;
      background-color: #ebf8ff;
      color: #2b6cb0;
      font-size: 12px;
      font-weight: bold;
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 20px;
    }

    .course-card h3 {
      font-size: 20px;
      margin-bottom: 15px;
      color: var(--primary-dark);
    }

    .course-meta {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 20px;
      padding-top: 15px;
      border-top: 1px solid var(--gray-border);
      display: flex;
      justify-content: space-between;
    }

    /* Reviews (6 Cards) */
    .reviews-section {
      background-color: var(--gray-light);
    }

    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .review-card {
      background-color: #ffffff;
      border-radius: 16px;
      padding: 30px;
      box-shadow: var(--shadow);
      border: 1px solid var(--gray-border);
    }

    .review-text {
      font-style: italic;
      color: var(--dark);
      font-size: 14px;
      line-height: 1.8;
      margin-bottom: 20px;
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 15px;
    }

    .user-avatar {
      width: 45px;
      height: 45px;
      border-radius: 50%;
      background-color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      color: var(--primary-dark);
    }

    .user-info h4 {
      font-size: 15px;
      margin-bottom: 2px;
    }

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

    /* Form & Lead Section (Smart Match) */
    .form-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 60px;
      align-items: flex-start;
    }

    .form-info h3 {
      font-size: 24px;
      margin-bottom: 20px;
      color: var(--primary-dark);
    }

    .form-info p {
      color: var(--text-muted);
      margin-bottom: 30px;
    }

    .info-list-item {
      display: flex;
      align-items: center;
      gap: 15px;
      margin-bottom: 20px;
    }

    .info-list-icon {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background-color: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
    }

    .lead-form-wrapper {
      background-color: #ffffff;
      padding: 40px;
      border-radius: 20px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      border: 1px solid var(--gray-border);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 14px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--gray-border);
      border-radius: 8px;
      font-size: 14px;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px var(--primary-light);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    /* FAQ (Accordion) */
    .faq-layout {
      max-width: 850px;
      margin: 0 auto;
    }

    .faq-item {
      background-color: #ffffff;
      border: 1px solid var(--gray-border);
      border-radius: 12px;
      margin-bottom: 15px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: '+';
      font-size: 20px;
      color: var(--primary);
      transition: var(--transition);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background-color: var(--gray-light);
    }

    .faq-answer-inner {
      padding: 20px 24px;
      font-size: 14px;
      color: var(--dark);
      border-top: 1px solid var(--gray-border);
      line-height: 1.8;
    }

    /* Articles / Knowledge Base */
    .articles-section {
      background-color: var(--gray-light);
    }

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
    }

    .article-card {
      background-color: #ffffff;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: var(--shadow);
      border: 1px solid var(--gray-border);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-body {
      padding: 25px;
    }

    .article-date {
      font-size: 12px;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .article-title {
      font-size: 16px;
      font-weight: bold;
      color: var(--dark);
      line-height: 1.5;
      margin-bottom: 15px;
    }

    .article-link {
      display: inline-flex;
      align-items: center;
      gap: 5px;
      color: var(--primary);
      font-weight: bold;
      font-size: 14px;
    }

    .article-link:hover {
      color: var(--primary-dark);
    }

    /* Footer */
    footer {
      background-color: #1a202c;
      color: #e2e8f0;
      padding: 80px 0 40px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 60px;
    }

    .footer-logo-area {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .footer-logo-area .ai-page-logo {
      
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 25px;
      position: relative;
    }

    .footer-col h4::after {
      content: '';
      position: absolute;
      bottom: -8px;
      left: 0;
      width: 30px;
      height: 2px;
      background-color: var(--primary);
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-links a {
      color: #a0aec0;
      font-size: 14px;
    }

    .footer-links a:hover {
      color: var(--primary);
      padding-left: 5px;
    }

    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 15px;
      font-size: 14px;
      color: #a0aec0;
    }

    .footer-qrcode {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .footer-qrcode img {
      width: 90px;
      height: 90px;
      border-radius: 8px;
      border: 3px solid #ffffff;
    }

    .footer-qrcode-info {
      font-size: 13px;
      color: #a0aec0;
    }

    .footer-bottom {
      border-top: 1px solid #2d3748;
      padding-top: 30px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    .footer-bottom p {
      font-size: 13px;
      color: #a0aec0;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      font-size: 13px;
    }

    .friend-links a {
      color: #a0aec0;
    }

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

    /* Floating Contact */
    .float-contact {
      position: fixed;
      right: 30px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 15px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background-color: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 15px rgba(32, 201, 151, 0.4);
      cursor: pointer;
      position: relative;
      transition: var(--transition);
    }

    .float-btn:hover {
      background-color: var(--primary-dark);
      transform: translateY(-3px);
    }

    .float-btn svg {
      width: 24px;
      height: 24px;
      fill: currentColor;
    }

    .qrcode-hover-box {
      position: absolute;
      bottom: 60px;
      right: 0;
      background-color: #ffffff;
      padding: 15px;
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--gray-border);
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: var(--transition);
      width: 160px;
      text-align: center;
    }

    .qrcode-hover-box img {
      width: 130px;
      height: 130px;
      margin-bottom: 8px;
    }

    .qrcode-hover-box span {
      font-size: 12px;
      color: var(--dark);
      display: block;
    }

    .float-btn:hover .qrcode-hover-box {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    /* Responsive Design */
    @media (max-width: 1024px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-timeline {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
      }
      .flow-step::after {
        display: none;
      }
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background-color: #ffffff;
        flex-direction: column;
        padding: 30px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        border-top: 1px solid var(--gray-border);
        opacity: 0;
        visibility: hidden;
        transform: translateY(-20px);
        transition: var(--transition);
      }

      .nav-menu.active {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
      }

      .mobile-menu-btn {
        display: flex;
      }

      .nav-actions {
        display: none;
      }

      .hero-content h1 {
        font-size: 32px;
      }

      .about-layout, .specs-grid, .cases-grid, .form-layout {
        grid-template-columns: 1fr;
        gap: 40px;
      }

      .services-grid, .reviews-grid, .articles-grid {
        grid-template-columns: 1fr;
      }

      .footer-grid {
        grid-template-columns: 1fr;
      }

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }