/* CSS Variables & Light Purple Vibrant Theme */
    :root {
      --primary: #7c3aed;
      --primary-hover: #6d28d9;
      --primary-light: #f5f3ff;
      --primary-glow: rgba(124, 58, 237, 0.25);
      --secondary: #ec4899;
      --secondary-gradient: linear-gradient(135deg, #7c3aed 0%, #a855f7 50%, #ec4899 100%);
      --bg-base: #faf9fe;
      --bg-surface: #ffffff;
      --bg-card: #ffffff;
      --border-color: #ede9fe;
      --border-focus: #c4b5fd;
      --text-main: #1e1b4b;
      --text-muted: #475569;
      --text-light: #64748b;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(124, 58, 237, 0.05);
      --shadow-md: 0 8px 24px rgba(124, 58, 237, 0.08);
      --shadow-lg: 0 16px 36px rgba(124, 58, 237, 0.12);
      --transition: all 0.3s 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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      background-image: 
        radial-gradient(circle at 10% 15%, rgba(168, 85, 247, 0.06) 0%, transparent 40%),
        radial-gradient(circle at 90% 45%, rgba(236, 72, 153, 0.05) 0%, transparent 45%),
        radial-gradient(circle at 50% 85%, rgba(124, 58, 237, 0.05) 0%, transparent 50%);
      background-attachment: fixed;
    }

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

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 12px rgba(124, 58, 237, 0.04);
    }

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

    .brand-group {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-group img {
      max-height: 40px;
      width: auto;
      display: block;
    }

    .brand-text {
      display: flex;
      flex-direction: column;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
      line-height: 1.2;
    }

    .brand-tag {
      font-size: 0.72rem;
      color: var(--text-light);
      font-weight: 500;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      display: block;
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      text-decoration: none;
      transition: var(--transition);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background: var(--primary-light);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 9999px;
      text-decoration: none;
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--secondary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 16px var(--primary-glow);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 22px rgba(124, 58, 237, 0.35);
      color: #ffffff;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--primary);
      border-color: #d8b4fe;
    }

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

    .btn-large {
      padding: 14px 34px;
      font-size: 1.08rem;
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 6px;
    }

    /* Hero Section (Strictly NO IMAGES) */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #e9d5ff;
      border-radius: 9999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      background: #ec4899;
      border-radius: 50%;
      display: inline-block;
      animation: pulseDot 2s infinite;
    }

    @keyframes pulseDot {
      0% { transform: scale(0.9); opacity: 0.8; }
      50% { transform: scale(1.3); opacity: 1; box-shadow: 0 0 10px #ec4899; }
      100% { transform: scale(0.9); opacity: 0.8; }
    }

    .hero-title {
      font-size: clamp(2rem, 4vw, 2.75rem);
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: clamp(1rem, 2vw, 1.2rem);
      color: var(--text-muted);
      max-width: 860px;
      margin: 0 auto 34px;
      font-weight: 400;
    }

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

    /* Hero Feature Grid (CSS based, no images) */
    .hero-feature-deck {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 18px;
      margin-top: 20px;
      text-align: left;
    }

    .hero-stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 22px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .hero-stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: var(--secondary-gradient);
      opacity: 0;
      transition: var(--transition);
    }

    .hero-stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #d8b4fe;
    }

    .hero-stat-card:hover::before {
      opacity: 1;
    }

    .stat-number {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.1;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .stat-desc {
      font-size: 0.82rem;
      color: var(--text-light);
      line-height: 1.4;
    }

    /* Global Section Headers */
    .section {
      padding: 64px 0;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 44px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      padding: 4px 14px;
      background: var(--primary-light);
      border-radius: 9999px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: clamp(1.6rem, 3vw, 2.15rem);
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-desc {
      font-size: 0.98rem;
      color: var(--text-muted);
    }

    /* Model Hub Grid */
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid #e2e8f0;
      padding: 8px 16px;
      border-radius: 9999px;
      font-size: 0.86rem;
      font-weight: 600;
      color: #334155;
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--primary-light);
      border-color: #c4b5fd;
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* Card Grids */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #c4b5fd;
    }

    .card-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      border: 1px solid #ede9fe;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .card-footer-action {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed #f1f5f9;
    }

    .text-link {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary);
      text-decoration: none;
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: var(--transition);
    }

    .text-link:hover {
      color: var(--secondary);
      transform: translateX(4px);
    }

    /* Comparison Table Component */
    .comparison-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
      overflow-x: auto;
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(135deg, #f5f3ff 0%, #fdf2f8 100%);
      padding: 20px 26px;
      border-radius: var(--radius-md);
      border: 1px solid #e9d5ff;
      margin-bottom: 28px;
      flex-wrap: wrap;
      gap: 16px;
    }

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

    .score-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

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

    .custom-table th, 
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f1f5f9;
      font-size: 0.92rem;
    }

    .custom-table th {
      background: #faf5ff;
      color: var(--text-main);
      font-weight: 700;
    }

    .custom-table th.highlight-col,
    .custom-table td.highlight-col {
      background: #fdf4ff;
      color: var(--primary);
      font-weight: 700;
      border-left: 1px solid #f0abfc;
      border-right: 1px solid #f0abfc;
    }

    .badge-check {
      color: #10b981;
      font-weight: 700;
    }

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

    /* Process Flow */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 24px;
      position: relative;
    }

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: var(--transition);
    }

    .process-card:hover {
      border-color: #c4b5fd;
      transform: translateY(-4px);
    }

    .process-step-num {
      width: 38px;
      height: 38px;
      background: var(--secondary-gradient);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.05rem;
      margin-bottom: 16px;
      box-shadow: 0 4px 10px var(--primary-glow);
    }

    /* Visual Media Grid */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
      margin-top: 24px;
    }

    .media-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .media-box:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .media-box img {
      width: 100%;
      height: auto;
      display: block;
      transition: var(--transition);
    }

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

    .media-content {
      padding: 20px;
    }

    /* Reviews Section */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 22px;
    }

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

    .review-card:hover {
      border-color: #d8b4fe;
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

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

    .user-avatar-initial {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      border: 1px solid #d8b4fe;
    }

    .user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .review-body {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      font-style: italic;
    }

    .review-stars {
      color: #f59e0b;
      margin-top: 12px;
      font-size: 0.85rem;
    }

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

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

    .faq-item:hover {
      border-color: #c4b5fd;
    }

    .faq-question {
      width: 100%;
      padding: 18px 22px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

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

    .faq-toggle-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.3s ease;
    }

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

    .faq-answer {
      padding: 0 22px 18px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      display: none;
      border-top: 1px dashed #f1f5f9;
      padding-top: 14px;
    }

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

    /* Form & Contact Section */
    .contact-layout {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 18px;
    }

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

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #cbd5e1;
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #f8fafc;
      transition: var(--transition);
      font-family: inherit;
    }

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

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    .contact-info-panel {
      background: linear-gradient(135deg, #faf5ff 0%, #f5f3ff 100%);
      border: 1px solid #e9d5ff;
      border-radius: var(--radius-md);
      padding: 28px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin: 18px 0;
    }

    .contact-list-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .contact-list-item strong {
      color: var(--text-main);
      min-width: 80px;
    }

    .qr-container {
      display: flex;
      align-items: center;
      gap: 18px;
      padding: 16px;
      background: #ffffff;
      border-radius: var(--radius-sm);
      border: 1px solid #ede9fe;
    }

    .qr-container img {
      width: 90px;
      height: 90px;
      border-radius: 4px;
      display: block;
      object-fit: contain;
    }

    .qr-text {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    .qr-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }

    /* Article & Resource Links */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 14px;
      margin-top: 16px;
    }

    .article-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 14px 18px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.88rem;
      font-weight: 600;
      transition: var(--transition);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-pill:hover {
      border-color: var(--primary);
      background: var(--primary-light);
      color: var(--primary);
      transform: translateX(3px);
    }

    /* Footer Layout */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 24px;
      margin-top: 40px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.2fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 32px;
    }

    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links-list a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: var(--transition);
    }

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

    .friend-links-box {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .friend-links-box a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.84rem;
      background: #f8fafc;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid #e2e8f0;
      transition: var(--transition);
    }

    .friend-links-box a:hover {
      background: var(--primary-light);
      color: var(--primary);
      border-color: #d8b4fe;
    }

    .footer-bottom {
      border-top: 1px solid #f1f5f9;
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.84rem;
      color: var(--text-light);
      flex-wrap: wrap;
      gap: 12px;
    }

    .ai-page-home-link {
      color: var(--primary);
      text-decoration: none;
      font-weight: 600;
    }

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

    .tool-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid #ede9fe;
      color: var(--primary);
      box-shadow: 0 4px 14px rgba(124, 58, 237, 0.18);
      display: flex;
      align-items: center;
      justify-content: center;
      text-decoration: none;
      font-size: 1.1rem;
      cursor: pointer;
      transition: var(--transition);
    }

    .tool-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    /* Responsive Rules */
    @media (max-width: 992px) {
      .contact-layout {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }

      .nav-menu.open {
        display: block;
      }

      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
      }

      .nav-links li {
        width: 100%;
      }

      .nav-links li a {
        padding: 10px 0;
        width: 100%;
      }

      .menu-toggle {
        display: block;
      }

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

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