:root {
      --bg-dark: #0a0612;
      --bg-card: rgba(22, 12, 36, 0.85);
      --bg-card-hover: rgba(36, 18, 58, 0.95);
      --pink-neon: #ff2a85;
      --purple-neon: #9d4edd;
      --cyan-neon: #00f0ff;
      --text-main: #f5efff;
      --text-muted: #a395b8;
      --border-color: rgba(255, 42, 133, 0.25);
      --border-focus: #ff2a85;
      --gradient-primary: linear-gradient(135deg, #ff2a85 0%, #9d4edd 50%, #00f0ff 100%);
      --glow-pink: 0 0 20px rgba(255, 42, 133, 0.35);
      --glow-purple: 0 0 20px rgba(157, 78, 221, 0.35);
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-main);
    }

    body {
      background: radial-gradient(circle at 10% 20%, rgba(255, 42, 133, 0.08) 0%, transparent 40%),
                  radial-gradient(circle at 90% 80%, rgba(157, 78, 221, 0.08) 0%, transparent 40%),
                  var(--bg-dark);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

    /* Header & Navigation */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(10, 6, 18, 0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
      font-size: 1.25rem;
      font-weight: 700;
      letter-spacing: 1px;
    }

    .brand-logo img.ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

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

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.95rem;
      padding: 8px 12px;
      transition: all 0.3s ease;
      display: inline-block;
    }

    .nav-links a:hover, .nav-links a.active {
      color: var(--pink-neon);
      text-shadow: 0 0 8px rgba(255, 42, 133, 0.6);
    }

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

    .btn-cyber {
      background: var(--gradient-primary);
      color: #fff;
      text-decoration: none;
      padding: 9px 20px;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: none;
      cursor: pointer;
      box-shadow: var(--glow-pink);
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-cyber:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(255, 42, 133, 0.6);
      color: #fff;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--purple-neon);
      color: var(--text-main);
      padding: 8px 18px;
      border-radius: 6px;
      font-size: 0.9rem;
      font-weight: 500;
      text-decoration: none;
      transition: all 0.3s;
    }

    .btn-outline:hover {
      background: rgba(157, 78, 221, 0.2);
      border-color: var(--pink-neon);
      color: #fff;
    }

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

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 90px 0 60px;
      text-align: center;
      position: relative;
    }

    .badge-pill {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 50px;
      background: rgba(255, 42, 133, 0.15);
      border: 1px solid var(--pink-neon);
      color: var(--pink-neon);
      font-size: 0.85rem;
      margin-bottom: 24px;
      letter-spacing: 1px;
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      background: var(--gradient-primary);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 18px;
      margin-bottom: 50px;
      flex-wrap: wrap;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: 12px;
      transition: transform 0.3s, border-color 0.3s;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--pink-neon);
    }

    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--cyan-neon);
      margin-bottom: 6px;
      font-family: monospace, sans-serif;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Section Global Styles */
    section {
      padding: 70px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .section-header {
      text-align: center;
      margin-bottom: 45px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #fff;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 650px;
      margin: 0 auto;
    }

    /* Grid & Cards */
    .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;
    }

    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 28px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .card:hover {
      background: var(--bg-card-hover);
      border-color: var(--purple-neon);
      transform: translateY(-4px);
      box-shadow: var(--glow-purple);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(157, 78, 221, 0.2);
      border: 1px solid var(--purple-neon);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
      color: var(--pink-neon);
    }

    .card-title {
      font-size: 1.2rem;
      font-weight: 600;
      margin-bottom: 10px;
      color: #fff;
    }

    .card-text {
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
      flex-grow: 1;
    }

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

    .model-tag {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      color: var(--text-main);
      transition: all 0.2s;
    }

    .model-tag:hover {
      background: rgba(255, 42, 133, 0.2);
      border-color: var(--pink-neon);
      color: #fff;
    }

    /* Workflow Steps */
    .workflow-steps {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
    }

    .step-index {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--gradient-primary);
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }

    /* Comparison Table */
    .table-container {
      overflow-x: auto;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 10px;
    }

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

    th, td {
      padding: 16px 20px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.95rem;
    }

    th {
      color: var(--pink-neon);
      font-weight: 600;
      background: rgba(0, 0, 0, 0.2);
    }

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

    .highlight-col {
      background: rgba(255, 42, 133, 0.06);
      color: #fff;
      font-weight: 500;
    }

    .score-banner {
      background: rgba(255, 42, 133, 0.15);
      border: 1px solid var(--pink-neon);
      border-radius: 8px;
      padding: 16px 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-badge {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--cyan-neon);
    }

    /* Media Showcase */
    .media-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
    }

    .media-card img.ai-page-image {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-card:hover img.ai-page-image {
      transform: scale(1.03);
    }

    .media-info {
      padding: 18px;
    }

    /* Testimonials */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
    }

    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      display: flex;
      flex-direction: column;
    }

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

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--gradient-primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: #fff;
    }

    .review-author {
      font-weight: 600;
      color: #fff;
    }

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

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

    /* FAQ Accordion */
    .faq-container {
      max-width: 850px;
      margin: 0 auto;
    }

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

    .faq-question {
      padding: 18px 20px;
      width: 100%;
      background: none;
      border: none;
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      text-align: left;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

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

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

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

    .faq-answer {
      padding: 0 20px 18px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
      display: none;
    }

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

    /* Articles Section */
    .article-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 15px;
    }

    .article-link-item {
      background: rgba(255, 255, 255, 0.04);
      border: 1px solid var(--border-color);
      padding: 10px 18px;
      border-radius: 6px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: all 0.3s;
    }

    .article-link-item:hover {
      color: var(--pink-neon);
      border-color: var(--pink-neon);
      background: rgba(255, 42, 133, 0.1);
    }

    /* Form & Contact Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: start;
    }

    .form-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 32px;
    }

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

    .form-label {
      display: block;
      margin-bottom: 6px;
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      background: rgba(10, 6, 18, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.15);
      border-radius: 6px;
      color: #fff;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.3s;
    }

    .form-control:focus {
      border-color: var(--pink-neon);
      box-shadow: 0 0 10px rgba(255, 42, 133, 0.3);
    }

    .contact-info-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 32px;
    }

    .qr-container {
      margin-top: 20px;
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .qr-container img {
      width: 120px;
      height: 120px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      background: #fff;
    }

    /* Footer */
    footer {
      background: #06030c;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 50px 0 30px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-content {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 30px;
    }

    .footer-col h4 {
      color: #fff;
      margin-bottom: 16px;
      font-size: 1.05rem;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a, .friend-links a {
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-links a:hover, .friend-links a:hover {
      color: var(--pink-neon);
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
    }

    /* Floating Widget */
    .floating-kefu {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      background: var(--gradient-primary);
      width: 50px;
      height: 50px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      cursor: pointer;
      box-shadow: var(--glow-pink);
    }

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

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: rgba(10, 6, 18, 0.98);
        border-bottom: 1px solid var(--border-color);
        padding: 20px 0;
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 1.95rem;
      }
    }