/* Global Reset & Theme (鲜黄耀眼风 Enterprise Style) */
    :root {
      --primary-yellow: #FFD700;
      --accent-yellow: #FFC800;
      --light-yellow: #FFFDF0;
      --dark-bg: #121316;
      --card-dark: #1A1C23;
      --text-dark: #1F2937;
      --text-muted: #6B7280;
      --bg-light: #F9FAFB;
      --white: #FFFFFF;
      --border-color: #E5E7EB;
      --border-yellow: #F3C614;
      --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 12px 24px rgba(255, 215, 0, 0.25);
      --radius: 8px;
      --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;
      background-color: var(--bg-light);
      color: var(--text-dark);
      line-height: 1.6;
    }

    body {
      background-color: var(--bg-light);
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    /* Section Baseline */
    .section-padding {
      padding: 80px 0;
    }

    .section-bg-alt {
      background-color: var(--light-yellow);
    }

    .section-bg-dark {
      background-color: var(--dark-bg);
      color: #F9FAFB;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-tag {
      display: inline-block;
      background-color: var(--primary-yellow);
      color: #111;
      font-weight: 700;
      font-size: 13px;
      padding: 4px 14px;
      border-radius: 20px;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }

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

    .section-bg-dark .section-title {
      color: #FFFFFF;
    }

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

    .section-bg-dark .section-desc {
      color: #9CA3AF;
    }

    /* Header & Navigation */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 3px solid var(--primary-yellow);
      box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    }

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

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-text {
      font-size: 20px;
      font-weight: 800;
      color: #111;
      letter-spacing: -0.5px;
    }

    /* Mandatory CSS requirement: .nav-links gap set to 0 */
    .nav-links {
      gap: 0;
      display: flex;
      align-items: center;
      list-style: none;
    }

    .nav-links li a {
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 600;
      color: #374151;
      border-radius: 4px;
    }

    .nav-links li a:hover {
      background-color: var(--primary-yellow);
      color: #111;
    }

    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-nav-primary {
      background: var(--primary-yellow);
      color: #111;
      padding: 9px 20px;
      font-weight: 700;
      font-size: 14px;
      border-radius: 6px;
      border: 2px solid #111;
      box-shadow: 3px 3px 0 #111;
    }

    .btn-nav-primary:hover {
      transform: translate(-1px, -1px);
      box-shadow: 4px 4px 0 #111;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: #111;
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      background: linear-gradient(135deg, #111319 0%, #1A1D26 100%);
      color: #FFFFFF;
      padding: 90px 0 100px;
      position: relative;
      border-bottom: 5px solid var(--primary-yellow);
      overflow: hidden;
    }

    .hero-badge-wrap {
      text-align: center;
      margin-bottom: 24px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(255, 215, 0, 0.15);
      border: 1px solid var(--primary-yellow);
      color: var(--primary-yellow);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 700;
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-title {
      font-size: 44px;
      line-height: 1.2;
      font-weight: 900;
      color: #FFFFFF;
      margin-bottom: 24px;
      letter-spacing: -1px;
    }

    .hero-title span {
      color: var(--primary-yellow);
      background: linear-gradient(90deg, #FFD700, #FFE866);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-subtitle {
      font-size: 18px;
      color: #D1D5DB;
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 18px;
      flex-wrap: wrap;
    }

    .btn-hero-main {
      background-color: var(--primary-yellow);
      color: #111;
      font-size: 18px;
      font-weight: 800;
      padding: 15px 36px;
      border-radius: 8px;
      border: 2px solid #FFF;
      box-shadow: 0 4px 20px rgba(255, 215, 0, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-hero-main:hover {
      transform: translateY(-2px);
      background-color: #FFE033;
      box-shadow: 0 8px 30px rgba(255, 215, 0, 0.6);
    }

    .btn-hero-secondary {
      background: transparent;
      color: #FFF;
      font-size: 16px;
      font-weight: 700;
      padding: 15px 30px;
      border-radius: 8px;
      border: 2px solid rgba(255, 255, 255, 0.3);
    }

    .btn-hero-secondary:hover {
      border-color: var(--primary-yellow);
      color: var(--primary-yellow);
    }

    /* Hero Key Indicator Cards (Pure CSS) */
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 60px;
    }

    .metric-card {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-top: 3px solid var(--primary-yellow);
      padding: 20px;
      border-radius: 8px;
      text-align: center;
    }

    .metric-num {
      font-size: 32px;
      font-weight: 900;
      color: var(--primary-yellow);
    }

    .metric-label {
      font-size: 13px;
      color: #9CA3AF;
      margin-top: 6px;
    }

    /* Section: About & Platform Overview */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 26px;
      margin-bottom: 16px;
      color: var(--text-dark);
    }

    .about-text p {
      color: #4B5563;
      font-size: 15px;
      margin-bottom: 16px;
    }

    .about-feature-list {
      list-style: none;
      margin-top: 20px;
    }

    .about-feature-list li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .about-feature-list li::before {
      content: "✓";
      position: absolute;
      left: 0;
      top: 0;
      color: #111;
      background: var(--primary-yellow);
      width: 20px;
      height: 20px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 12px;
    }

    .about-highlight-box {
      background: var(--white);
      border: 2px solid var(--primary-yellow);
      padding: 30px;
      border-radius: 12px;
      box-shadow: var(--shadow-sm);
    }

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

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

    /* Feature / Service Cards */
    .feature-card {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 24px;
      transition: all 0.3s ease;
      position: relative;
    }

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

    .feature-badge {
      font-size: 11px;
      font-weight: 700;
      background: var(--primary-yellow);
      color: #111;
      padding: 2px 8px;
      border-radius: 4px;
      margin-bottom: 12px;
      display: inline-block;
    }

    .feature-card h4 {
      font-size: 18px;
      margin-bottom: 10px;
      color: #111;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* Model Tag Wall */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-tag {
      background: var(--white);
      border: 1px solid #D1D5DB;
      padding: 8px 16px;
      border-radius: 20px;
      font-weight: 600;
      font-size: 13px;
      color: #374151;
      box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    }

    .model-tag.highlight {
      background: var(--primary-yellow);
      border-color: #111;
      color: #111;
      font-weight: 700;
    }

    /* Process Step Flow */
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--white);
      border: 2px solid var(--border-color);
      border-radius: 8px;
      padding: 24px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      background: var(--primary-yellow);
      color: #111;
      font-weight: 900;
      font-size: 18px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
      border: 2px solid #111;
    }

    .step-card h4 {
      font-size: 16px;
      margin-bottom: 8px;
    }

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

    /* Comparison Table */
    .comp-container {
      background: var(--white);
      border-radius: 12px;
      border: 2px solid var(--primary-yellow);
      overflow-x: auto;
      box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    }

    .comp-score-header {
      background: #111;
      color: #FFF;
      padding: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 15px;
    }

    .comp-rating-badge {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .stars {
      color: var(--primary-yellow);
      font-size: 20px;
    }

    .score-num {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary-yellow);
    }

    .comp-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .comp-table th {
      background: #F3F4F6;
      font-weight: 700;
      color: #111;
    }

    .comp-table td.highlight-col {
      background: #FFFDF0;
      font-weight: 700;
      color: #111;
      border-left: 2px solid var(--primary-yellow);
      border-right: 2px solid var(--primary-yellow);
    }

    /* Token Price Table */
    .token-table {
      width: 100%;
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      border-collapse: collapse;
      font-size: 14px;
      overflow: hidden;
    }

    .token-table th, .token-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      text-align: left;
    }

    .token-table th {
      background: #111;
      color: #FFF;
    }

    .tag-cheap {
      background: #DEF7EC;
      color: #03543F;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 12px;
      font-weight: 700;
    }

    /* Case Media Showcase (Outside Hero Section) */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      margin-top: 30px;
    }

    .media-card {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px;
      overflow: hidden;
    }

    .media-card h5 {
      font-size: 16px;
      margin-bottom: 10px;
    }

    .ai-page-image {
      border-radius: 6px;
      display: block;
      margin-bottom: 10px;
    }

    /* FAQ Collapsible Panel */
    .faq-grid {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 16px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #FFFFFF;
      transition: background-color 0.2s ease;
    }

    .faq-question:hover {
      background: var(--light-yellow);
    }

    .faq-toggle {
      font-size: 20px;
      font-weight: 400;
      color: var(--text-muted);
    }

    .faq-answer {
      padding: 0 24px 18px;
      display: none;
      color: #4B5563;
      font-size: 14px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    /* Testimonials (6 User Comments) */
    .testimonial-card {
      background: var(--white);
      border-top: 4px solid var(--primary-yellow);
      border-left: 1px solid var(--border-color);
      border-right: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-placeholder {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-yellow);
      color: #111;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 16px;
    }

    .user-details h5 {
      font-size: 15px;
      color: #111;
    }

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

    .testimonial-text {
      font-size: 14px;
      color: #374151;
      line-height: 1.6;
    }

    /* Article List Section */
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .article-item {
      background: var(--white);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .article-item a {
      font-weight: 600;
      color: #111;
    }

    .article-item a:hover {
      color: #D97706;
    }

    /* Contact Form & Contact Details */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

    .contact-info-card {
      background: #111;
      color: #FFF;
      padding: 36px;
      border-radius: 12px;
      border-top: 4px solid var(--primary-yellow);
    }

    .contact-info-card h4 {
      font-size: 22px;
      color: var(--primary-yellow);
      margin-bottom: 20px;
    }

    .contact-detail-item {
      margin-bottom: 16px;
      font-size: 15px;
    }

    .contact-detail-item strong {
      color: var(--primary-yellow);
    }

    .qr-wrap {
      margin-top: 24px;
      background: #FFF;
      padding: 12px;
      border-radius: 8px;
      display: inline-block;
      text-align: center;
    }

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

    .qr-label {
      color: #111;
      font-size: 12px;
      font-weight: 700;
      margin-top: 6px;
    }

    .form-box {
      background: var(--white);
      padding: 36px;
      border-radius: 12px;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

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

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      margin-bottom: 6px;
      color: #374151;
    }

    .form-control {
      width: 100%;
      padding: 12px;
      border: 1px solid #D1D5DB;
      border-radius: 6px;
      font-size: 14px;
    }

    .form-control:focus {
      outline: none;
      border-color: #111;
      box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.4);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    .btn-submit {
      width: 100%;
      background: var(--primary-yellow);
      color: #111;
      font-size: 16px;
      font-weight: 800;
      padding: 14px;
      border: 2px solid #111;
      border-radius: 6px;
      cursor: pointer;
      box-shadow: 3px 3px 0 #111;
    }

    .btn-submit:hover {
      transform: translate(-1px, -1px);
      box-shadow: 4px 4px 0 #111;
    }

    /* Footer & Links */
    .footer {
      background: #0B0C0E;
      color: #9CA3AF;
      padding: 60px 0 30px;
      border-top: 4px solid var(--primary-yellow);
      font-size: 14px;
    }

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

    .footer-col h5 {
      color: #FFF;
      font-size: 16px;
      margin-bottom: 16px;
      border-left: 3px solid var(--primary-yellow);
      padding-left: 8px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.7;
    }

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

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

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

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 20px;
      border-top: 1px solid #1F2937;
    }

    .friend-links a {
      color: #9CA3AF;
      font-size: 13px;
    }

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

    .footer-bottom {
      border-top: 1px solid #1F2937;
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
    }

    .ai-page-home-link {
      color: var(--primary-yellow);
      font-weight: 700;
    }

    /* Floating Contact Widget */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      background: var(--primary-yellow);
      color: #111;
      border: 2px solid #111;
      border-radius: 50px;
      padding: 12px 20px;
      font-weight: 800;
      font-size: 14px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.2);
      display: flex;
      align-items: center;
      gap: 8px;
      cursor: pointer;
    }

    .floating-kefu:hover {
      transform: translateY(-2px);
    }

    /* Responsive Adaptation */
    @media (max-width: 992px) {
      .grid-3, .grid-4, .hero-metrics, .process-steps, .article-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid, .contact-grid, .footer-grid, .media-showcase-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 34px;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFF;
        padding: 20px;
        border-bottom: 2px solid var(--primary-yellow);
        box-shadow: 0 10px 20px rgba(0,0,0,0.1);
      }
    }

    @media (max-width: 576px) {
      .grid-3, .grid-4, .hero-metrics, .process-steps, .article-list {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 26px;
      }
      .hero-actions {
        flex-direction: column;
        width: 100%;
      }
      .btn-hero-main, .btn-hero-secondary {
        width: 100%;
        text-align: center;
        justify-content: center;
      }
    }