:root {
      --primary-grad: linear-gradient(135deg, #4F46E5 0%, #7C3AED 50%, #EC4899 100%);
      --primary-color: #6366F1;
      --primary-hover: #4F46E5;
      --accent-color: #F59E0B;
      --accent-grad: linear-gradient(135deg, #FF6B6B 0%, #FF8E53 100%);
      --bg-light: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(99, 102, 241, 0.08);
      --shadow-lg: 0 20px 30px -10px rgba(79, 70, 229, 0.15);
      --radius: 12px;
    }

    * {
      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;
    }

    body {
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: var(--primary-color);
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* Header & Nav */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      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: 70px;
    }

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

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

    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      background: var(--primary-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

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

    .nav-links li a {
      display: block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary-color);
      background: rgba(99, 102, 241, 0.06);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary-grad);
      color: #FFFFFF !important;
      box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
    }

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

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

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

    /* Section Styles */
    section {
      padding: 80px 0;
      position: relative;
    }

    .section-bg-alt {
      background: #FFFFFF;
    }

    .section-header {
      text-align: center;
      max-width: 800px;
      margin: 0 auto 50px auto;
    }

    .section-subtitle {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary-color);
      background: rgba(99, 102, 241, 0.1);
      border-radius: 20px;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    /* Hero Section - STRICT NO IMAGES */
    .hero-section {
      padding: 100px 0 80px 0;
      background: radial-gradient(circle at 50% 20%, rgba(124, 58, 237, 0.08) 0%, rgba(248, 250, 252, 0) 70%), var(--bg-light);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #FFFFFF;
      border: 1px solid rgba(99, 102, 241, 0.2);
      box-shadow: var(--shadow-sm);
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 24px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: var(--primary-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-sub {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px auto;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag-item {
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

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

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    /* Cards */
    .card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: all 0.3s ease;
      box-shadow: var(--shadow-sm);
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(99, 102, 241, 0.3);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card-text {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* Metrics Cards */
    .stat-card {
      text-align: center;
      padding: 30px 20px;
      background: var(--card-bg);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .stat-number {
      font-size: 2.5rem;
      font-weight: 900;
      background: var(--primary-grad);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 8px;
    }

    .stat-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Supported Models Cloud */
    .model-badge-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .model-badge {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 8px;
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
    }

    .model-badge.highlight {
      background: rgba(99, 102, 241, 0.08);
      border-color: rgba(99, 102, 241, 0.3);
      color: var(--primary-color);
    }

    /* Comparison Rating Block */
    .eval-box {
      background: linear-gradient(135deg, #1E1B4B 0%, #312E81 100%);
      color: #FFFFFF;
      border-radius: 16px;
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

    .eval-score-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid rgba(255, 255, 255, 0.15);
      padding-bottom: 24px;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-badge {
      font-size: 3rem;
      font-weight: 900;
      color: #FBBF24;
    }

    .stars {
      color: #FBBF24;
      font-size: 1.5rem;
    }

    /* Comparison Table */
    .table-container {
      overflow-x: auto;
      background: #FFFFFF;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }

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

    th, td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    th {
      background: #F1F5F9;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .highlight-col {
      background: rgba(99, 102, 241, 0.03);
      font-weight: 600;
      color: var(--primary-color);
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-weight: 700;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      background: #FFFFFF;
    }

    .faq-answer {
      padding: 0 24px 20px 24px;
      color: var(--text-muted);
      display: none;
      font-size: 0.95rem;
      border-top: 1px solid #F1F5F9;
      padding-top: 16px;
    }

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

    .faq-icon {
      transition: transform 0.3s ease;
      font-size: 1.2rem;
    }

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

    /* Form Styles */
    .form-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-weight: 600;
      margin-bottom: 8px;
      font-size: 0.95rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.95rem;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

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

    /* Media Images Styling */
    .ai-page-image {
      border-radius: var(--radius);
      box-shadow: var(--shadow-md);
      transition: transform 0.3s ease;
    }

    .ai-page-image:hover {
      transform: scale(1.02);
    }

    /* Footer */
    footer {
      background: #0F172A;
      color: #94A3B8;
      padding: 60px 0 30px 0;
      border-top: 1px solid #1E293B;
    }

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

    .footer-brand {
      color: #FFFFFF;
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .footer-title {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 16px;
    }

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

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

    .footer-links a {
      color: #94A3B8;
    }

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

    .friend-links-area {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links-area a {
      color: #64748B;
    }

    .friend-links-area a:hover {
      color: #94A3B8;
    }

    .footer-bottom {
      border-top: 1px solid #1E293B;
      padding-top: 24px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748B;
    }

    /* Floating Contact */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 999;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 12px;
      box-shadow: var(--shadow-lg);
      text-align: center;
      max-width: 140px;
    }

    .floating-kefu img {
      width: 100px;
      height: 100px;
      border-radius: 6px;
    }

    .floating-kefu span {
      display: block;
      font-size: 0.8rem;
      font-weight: 700;
      color: var(--text-main);
      margin-top: 6px;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 768px) {
      .hero-title { font-size: 2rem; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active { display: flex; }
      .mobile-menu-toggle { display: block; }
      .footer-grid { grid-template-columns: 1fr; }
      .floating-kefu { display: none; }
    }