/* CSS Variables - 鲜绿夺目企业风格 */
    :root {
      --primary-color: #10b981;
      --primary-hover: #059669;
      --primary-dark: #047857;
      --primary-light: #ecfdf5;
      --primary-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
      --accent-color: #84cc16;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-white: #ffffff;
      --bg-subtle: #f1f5f9;
      --border-color: #e2e8f0;
      --border-highlight: #a7f3d0;
      --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 10px 25px rgba(16, 185, 129, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --max-width: 1200px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

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

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

    body {
      overflow-x: hidden;
    }

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

    /* Typography */
    h1, h2, h3, h4 {
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.25;
    }

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

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

    /* Section Component */
    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-white {
      background-color: var(--bg-white);
    }

    .section-subtle {
      background-color: var(--bg-subtle);
    }

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

    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.875rem;
      font-weight: 600;
      border-radius: 50px;
      margin-bottom: 14px;
      border: 1px solid var(--border-highlight);
    }

    .section-title {
      font-size: 2rem;
      color: var(--text-main);
      margin-bottom: 16px;
      letter-spacing: -0.02em;
    }

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

    /* Top Header / Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      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: 76px;
    }

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

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

    .brand-name {
      font-size: 1.35rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

    /* Strictly set nav-links gap to 0 as required */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      color: var(--primary-color);
      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 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-md);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      text-decoration: none;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(16, 185, 129, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(16, 185, 129, 0.45);
      color: #ffffff;
    }

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

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

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
    }

    /* HERO SECTION - Strictly NO Images allowed */
    .hero-section {
      background: radial-gradient(circle at 50% 10%, #ecfdf5 0%, #ffffff 70%);
      padding: 90px 0 70px 0;
      text-align: center;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-badge-wrap {
      margin-bottom: 20px;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: var(--bg-white);
      border: 1px solid var(--border-highlight);
      border-radius: 50px;
      color: var(--primary-dark);
      font-size: 0.9rem;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    .hero-tag-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary-color);
      border-radius: 50%;
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }

    .hero-title-h1 {
      font-size: 2.5rem;
      color: var(--text-main);
      margin-bottom: 20px;
      max-width: 900px;
      margin-left: auto;
      margin-right: auto;
      letter-spacing: -0.02em;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px auto;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 960px;
      margin: 0 auto;
    }

    .stat-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .stat-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* Cards & Grid Styling */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 20px;
      font-weight: bold;
    }

    .feature-title {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .feature-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Industry Scenarios Tag Grid */
    .scenario-badge {
      display: inline-block;
      padding: 4px 10px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.75rem;
      font-weight: 600;
      border-radius: 4px;
      margin-bottom: 8px;
    }

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

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }

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

    .comparison-table th {
      background: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }

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

    .comparison-table tr.highlight-row {
      background: #f0fdf4;
    }

    .badge-star {
      color: #f59e0b;
      font-weight: bold;
    }

    .score-box {
      background: var(--primary-gradient);
      color: #fff;
      padding: 24px;
      border-radius: var(--radius-md);
      text-align: center;
      margin-bottom: 30px;
    }

    .score-number {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1;
    }

    /* Workflow Steps */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary-color);
      opacity: 0.3;
      margin-bottom: 10px;
    }

    /* Cases & Media Section */
    .media-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .media-card-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #e2e8f0;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

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

    /* FAQ Accordion */
    .faq-grid {
      display: flex;
      flex-direction: column;
      gap: 14px;
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary-dark);
      background-color: var(--primary-light);
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary-color);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      background: var(--bg-white);
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 0 24px 20px 24px;
      border-top: 1px solid var(--bg-subtle);
    }

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

    /* Testimonials */
    .testimonial-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }

    .user-info-name {
      font-weight: 700;
      font-size: 1rem;
    }

    .user-info-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* Form Section */
    .form-wrapper {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
      background: var(--bg-main);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-color);
      background: #fff;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    /* Model Cloud Tags */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-tag {
      padding: 8px 16px;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 500;
      color: var(--text-main);
      transition: var(--transition);
    }

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

    /* Footer - High Readability Slate/Dark Style with Light Text for distinction */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      border-top: 3px solid var(--primary-color);
      font-size: 0.9rem;
    }

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

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.1rem;
      margin-bottom: 20px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 10px;
    }

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
    }

    .footer-links a:hover {
      color: #34d399;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qr-container img {
      width: 100px;
      height: 100px;
      border-radius: 8px;
      border: 2px solid #334155;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      color: #64748b;
      font-size: 0.85rem;
    }

    .friend-links {
      margin-bottom: 16px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
    }

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

    .friend-links a:hover {
      color: #34d399;
    }

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

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      text-decoration: none;
      font-weight: bold;
      transition: var(--transition);
      font-size: 1.2rem;
    }

    .float-btn:hover {
      transform: scale(1.1);
      color: #fff;
    }

    /* Responsive Adjustments */
    @media (max-width: 992px) {
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .steps-wrapper { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #fff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active { display: flex; }
      .nav-links li { width: 100%; text-align: center; }
      .nav-links li a { padding: 12px; }
      .nav-toggle { display: block; }
      .hero-title-h1 { font-size: 1.8rem; }
      .hero-stats-grid { grid-template-columns: 1fr; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .steps-wrapper { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .section-title { font-size: 1.6rem; }
    }