/* CSS RESET & VARIABLES - Bright Contrast Style (明艳撞色风) */
    :root {
      --primary-color: #0d52ef;       /* Vibrant Electric Blue */
      --primary-hover: #083cb8;
      --accent-color: #ff5e15;        /* Radiant Orange/Amber */
      --accent-light: #fff2ec;
      --highlight-color: #00d285;     /* Tech Emerald Green */
      --bg-main: #f8fafc;             /* Light Neutral Canvas */
      --bg-surface: #ffffff;
      --bg-alt: #f1f5f9;
      --text-main: #0f172a;           /* Deep Charcoal Body */
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --border-accent: #cbd5e1;
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
      --shadow-lg: 0 16px 36px rgba(13, 82, 239, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 20px;
      --max-width: 1200px;
      --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

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

    html {
      scroll-behavior: smooth;
      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;
    }

    body {
      overflow-x: hidden;
      width: 100%;
    }

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

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

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

    .section-padding {
      padding: 70px 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 48px;
    }

    .section-subtitle {
      display: inline-block;
      font-size: 14px;
      font-weight: 700;
      color: var(--accent-color);
      background: var(--accent-light);
      padding: 4px 14px;
      border-radius: 50px;
      text-transform: uppercase;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

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

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 12px auto 0;
    }

    /* Button System */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 15px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      border: 2px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      white-space: nowrap;
      gap: 8px;
    }

    .btn-primary {
      background: var(--primary-color);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(13, 82, 239, 0.3);
    }

    .btn-primary:hover {
      background: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(13, 82, 239, 0.4);
    }

    .btn-accent {
      background: var(--accent-color);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(255, 94, 21, 0.3);
    }

    .btn-accent:hover {
      background: #e04d07;
      transform: translateY(-2px);
    }

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

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

    /* Header & Navigation */
    .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);
    }

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

    .brand-area {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    /* SPECIFIC REQUIREMENT: .nav-links gap must be 0 */
    .nav-links {
      display: flex;
      gap: 0;
      align-items: center;
      list-style: none;
    }

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

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-color);
      background: rgba(13, 82, 239, 0.06);
    }

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

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

    /* Hero Section (STRICTLY NO IMAGES IN HERO) */
    .hero-section {
      padding: 90px 0 70px;
      background: linear-gradient(135deg, #ffffff 0%, #eef4ff 50%, #f7f9fc 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid rgba(13, 82, 239, 0.2);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-color);
      margin-bottom: 24px;
      box-shadow: 0 4px 12px rgba(13, 82, 239, 0.08);
    }

    .hero-badge span {
      background: var(--accent-color);
      color: #fff;
      padding: 2px 8px;
      border-radius: 10px;
      font-size: 11px;
    }

    .hero-title {
      font-size: 38px;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      max-width: 900px;
    }

    .hero-highlight {
      color: var(--primary-color);
      background: linear-gradient(120deg, var(--primary-color), #4f46e5);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 780px;
      margin-bottom: 36px;
      line-height: 1.7;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .stat-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-color);
    }

    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      margin-top: 4px;
    }

    /* Platform Introduction & About Us */
    .about-card-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: stretch;
    }

    .about-info-box {
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 36px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .about-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .about-tag {
      background: var(--bg-alt);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
    }

    /* Model Cloud Badge Section */
    .model-badge-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-chip {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 50px;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-main);
      box-shadow: 0 2px 4px rgba(0,0,0,0.03);
      transition: var(--transition);
    }

    .model-chip:hover {
      border-color: var(--accent-color);
      color: var(--accent-color);
      transform: translateY(-2px);
    }

    /* Service Capabilities Grid */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

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

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(13, 82, 239, 0.1);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 20px;
      margin-bottom: 18px;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Scenarios Grid (Creation Capabilities) */
    .scenarios-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .scenario-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 20px;
      transition: var(--transition);
    }

    .scenario-card:hover {
      border-color: var(--accent-color);
      background: #fffdfb;
    }

    .scenario-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

    /* Standard Process Steps */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #fff;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px;
    }

    .step-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* Comparison Section (STRICTLY 五星 / 9.9分) */
    .comparison-wrapper {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .rating-banner {
      background: linear-gradient(90deg, #fff4ee 0%, #eef4ff 100%);
      border: 1px solid #ffd4c2;
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
    }

    .rating-score {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-big {
      font-size: 44px;
      font-weight: 900;
      color: var(--accent-color);
      line-height: 1;
    }

    .stars {
      color: #ffb800;
      font-size: 20px;
      margin-bottom: 4px;
    }

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

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

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

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

    .comparison-table tr:hover {
      background: #f8fafc;
    }

    .badge-check {
      color: var(--highlight-color);
      font-weight: 800;
    }

    .badge-cross {
      color: #94a3b8;
    }

    /* Case Studies & Media Showcase */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .case-img-wrap {
      width: 100%;
      background: #eaefe9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-img-wrap img {
      width: 100%;
      height: auto;
      object-fit: cover;
      display: block;
    }

    .case-body {
      padding: 20px;
    }

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

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

    /* Token Price Table */
    .token-box {
      background: #0f172a;
      color: #f8fafc;
      border-radius: var(--radius-lg);
      padding: 40px;
    }

    .token-box h3 {
      font-size: 24px;
      margin-bottom: 12px;
      color: #ffffff;
    }

    .token-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 20px;
      color: #cbd5e1;
    }

    .token-table th, .token-table td {
      padding: 14px;
      border-bottom: 1px solid #334155;
      text-align: left;
      font-size: 14px;
    }

    .token-table th {
      color: #38bdf8;
      font-weight: 700;
    }

    .token-tag-low {
      background: rgba(0, 210, 133, 0.2);
      color: #00d285;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 700;
    }

    /* Franchise / Agency Section */
    .agent-card {
      background: linear-gradient(135deg, #ffffff 0%, #fff7ed 100%);
      border: 2px solid var(--accent-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

    .agent-feature-list {
      list-style: none;
      margin-top: 16px;
    }

    .agent-feature-list li {
      padding: 8px 0;
      font-size: 15px;
      font-weight: 600;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    /* User Testimonials Grid (6 Reviews) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }

    .user-info h4 {
      font-size: 15px;
      color: var(--text-main);
    }

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

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

    /* FAQ Accordion Section (>= 10 FAQs) */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

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

    .faq-header {
      width: 100%;
      padding: 18px 24px;
      background: none;
      border: none;
      text-align: left;
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

    .faq-header:hover {
      background: var(--bg-alt);
      color: var(--primary-color);
    }

    .faq-toggle-icon {
      font-size: 18px;
      transition: transform 0.3s;
    }

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

    .faq-body {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      padding: 0 24px;
      background: #fafbfc;
    }

    .faq-body-content {
      padding: 16px 0 20px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Articles / News Section */
    .articles-wrapper {
      background: var(--bg-surface);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
    }

    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .article-link-card {
      padding: 16px;
      background: var(--bg-alt);
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    /* Contact Section & Form POST ?s=index/submitForm */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-panel {
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 36px;
      border: 1px solid var(--border-color);
    }

    .qr-card {
      display: inline-block;
      padding: 16px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-top: 20px;
      text-align: center;
    }

    .qr-card img {
      width: 140px;
      height: 140px;
      object-fit: contain;
    }

    .contact-form-panel {
      background: var(--bg-surface);
      border-radius: var(--radius-lg);
      padding: 36px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      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: 14px;
      color: var(--text-main);
      background: #fff;
      transition: var(--transition);
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(13, 82, 239, 0.15);
    }

    /* Footer & Friendly Links */
    .footer {
      background: #090d16;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 14px;
    }

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

    .footer-brand h3 {
      color: #ffffff;
      font-size: 20px;
      margin-bottom: 12px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 15px;
      margin-bottom: 16px;
    }

    .footer-col ul {
      list-style: none;
    }

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

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

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

    .friend-links-bar {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      margin-top: 30px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-bar a {
      color: #94a3b8;
      font-size: 13px;
    }

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

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #64748b;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      border: none;
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.1);
      background: var(--accent-color);
    }

    /* Responsive Breakpoints */
    @media (max-width: 1024px) {
      .hero-stats-grid, .services-grid, .scenarios-grid, .cases-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-steps {
        grid-template-columns: repeat(3, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 28px;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .about-card-grid, .contact-grid, .agent-card {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid, .services-grid, .scenarios-grid, .cases-grid, .reviews-grid, .process-steps {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
      }
      .article-links-grid {
        grid-template-columns: 1fr;
      }
    }