:root {
      --bg-dark: #0a0d14;
      --bg-card: #121726;
      --bg-card-hover: #1a2238;
      --neon-cyan: #00f2fe;
      --neon-purple: #9d4edd;
      --neon-pink: #ff007f;
      --text-main: #f1f5f9;
      --text-sub: #94a3b8;
      --text-muted: #64748b;
      --border-neon: rgba(0, 242, 254, 0.25);
      --container-max: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-dark);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    a {
      color: var(--neon-cyan);
      text-decoration: none;
      transition: all 0.3s ease;
    }

    a:hover {
      color: var(--neon-pink);
    }

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

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(10, 13, 20, 0.9);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-neon);
    }

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

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

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

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 14px;
      color: var(--text-main);
      font-weight: 500;
    }

    .nav-links li a:hover {
      color: var(--neon-cyan);
      text-shadow: 0 0 8px rgba(0, 242, 254, 0.5);
    }

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

    .btn-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      border-radius: 6px;
      font-weight: 600;
      font-size: 14px;
      cursor: pointer;
      background: linear-gradient(135deg, var(--neon-cyan), var(--neon-purple));
      color: #fff;
      border: none;
      box-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
      transition: transform 0.2s, box-shadow 0.2s;
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 0 25px rgba(0, 242, 254, 0.6);
      color: #fff;
    }

    .btn-outline {
      background: transparent;
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
    }

    .btn-outline:hover {
      background: rgba(0, 242, 254, 0.1);
      color: #fff;
    }

    /* Mobile Nav Switch */
    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      color: var(--text-main);
      font-size: 24px;
      cursor: pointer;
    }

    /* Hero Section - STRICTLY NO IMAGES */
    .hero-section {
      padding: 100px 0 80px;
      background: radial-gradient(circle at 50% 30%, rgba(157, 78, 221, 0.15), transparent 70%);
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      border-radius: 20px;
      background: rgba(0, 242, 254, 0.1);
      border: 1px solid var(--neon-cyan);
      color: var(--neon-cyan);
      font-size: 13px;
      margin-bottom: 24px;
      letter-spacing: 1px;
    }

    .hero-section h1 {
      font-size: 42px;
      font-weight: 800;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #ffffff 0%, var(--neon-cyan) 50%, var(--neon-pink) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      max-width: 780px;
      margin: 0 auto 36px;
      font-size: 17px;
      color: var(--text-sub);
      line-height: 1.8;
    }

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

    /* Stats Grid */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 40px;
    }

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

    .stat-card:hover {
      transform: translateY(-5px);
      border-color: var(--neon-cyan);
    }

    .stat-num {
      font-size: 32px;
      font-weight: 700;
      color: var(--neon-cyan);
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-sub);
    }

    /* Section Component Base */
    .sec-block {
      padding: 80px 0;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }

    .sec-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .sec-title {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .sec-subtitle {
      font-size: 15px;
      color: var(--text-sub);
      max-width: 600px;
      margin: 0 auto;
    }

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

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

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

    .card-item {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 10px;
      padding: 28px;
      transition: all 0.3s ease;
    }

    .card-item:hover {
      background: var(--bg-card-hover);
      border-color: var(--neon-cyan);
      box-shadow: 0 8px 24px rgba(0, 242, 254, 0.12);
    }

    .card-icon {
      font-size: 28px;
      color: var(--neon-cyan);
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      color: #fff;
    }

    .card-desc {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* Case Media Showcase */
    .media-card {
      background: var(--bg-card);
      border-radius: 12px;
      overflow: hidden;
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .media-card img {
      width: 100%;
      height: 200px;
      object-fit: cover;
      display: block;
    }

    .media-body {
      padding: 20px;
    }

    /* Comparison Table */
    .table-responsive {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      background: var(--bg-card);
      border-radius: 12px;
      overflow: hidden;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .compare-table th {
      background: rgba(0, 242, 254, 0.08);
      color: var(--neon-cyan);
      font-weight: 600;
    }

    .compare-table tr:hover td {
      background: rgba(255, 255, 255, 0.02);
    }

    .highlight-col {
      color: var(--neon-pink);
      font-weight: 600;
    }

    /* Rating Card */
    .rating-box {
      background: linear-gradient(135deg, rgba(0,242,254,0.1), rgba(157,78,221,0.1));
      border: 1px solid var(--neon-cyan);
      border-radius: 12px;
      padding: 24px;
      text-align: center;
      margin-bottom: 30px;
    }

    .rating-score {
      font-size: 48px;
      font-weight: 800;
      color: var(--neon-cyan);
      line-height: 1;
    }

    .rating-stars {
      color: #ffd700;
      font-size: 20px;
      margin: 8px 0;
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: 8px;
      margin-bottom: 14px;
      overflow: hidden;
    }

    .faq-header {
      padding: 18px 24px;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: #fff;
    }

    .faq-header:hover {
      color: var(--neon-cyan);
    }

    .faq-body {
      padding: 0 24px 18px;
      font-size: 14px;
      color: var(--text-sub);
      display: none;
      border-top: 1px dashed rgba(255, 255, 255, 0.05);
      margin-top: 6px;
      padding-top: 14px;
    }

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

    /* Form Styles */
    .contact-form-wrap {
      background: var(--bg-card);
      border: 1px solid var(--border-neon);
      border-radius: 12px;
      padding: 40px;
      max-width: 700px;
      margin: 0 auto;
    }

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

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-size: 14px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border-radius: 6px;
      border: 1px solid rgba(255, 255, 255, 0.15);
      background: #090c14;
      color: #fff;
      font-size: 14px;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--neon-cyan);
      box-shadow: 0 0 8px rgba(0, 242, 254, 0.3);
    }

    /* Footer */
    .site-footer {
      background: #06080e;
      border-top: 1px solid var(--border-neon);
      padding: 60px 0 30px;
      font-size: 14px;
      color: var(--text-sub);
    }

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

    .footer-col h4 {
      color: #fff;
      font-size: 16px;
      margin-bottom: 20px;
    }

    .friend-links-wrap a {
      display: inline-block;
      margin-right: 12px;
      margin-bottom: 8px;
      color: var(--text-sub);
    }

    .friend-links-wrap a:hover {
      color: var(--neon-cyan);
    }

    .copyright-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* Floating Widget */
    .float-kefu {
      position: fixed;
      right: 25px;
      bottom: 25px;
      z-index: 999;
      background: var(--bg-card);
      border: 1px solid var(--neon-cyan);
      border-radius: 50px;
      padding: 10px 20px;
      display: flex;
      align-items: center;
      gap: 10px;
      box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
      cursor: pointer;
    }

    .float-kefu img {
      width: 32px;
      height: 32px;
      border-radius: 50%;
    }

    /* Article List */
    .article-list {
      list-style: none;
    }

    .article-list li {
      padding: 10px 0;
      border-bottom: 1px dashed rgba(255,255,255,0.08);
    }

    /* Responsive */
    @media (max-width: 992px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-content { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links { display: none; }
      .mobile-menu-btn { display: block; }
      .grid-3, .grid-4, .grid-2 { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr; }
      .hero-section h1 { font-size: 28px; }
      .footer-content { grid-template-columns: 1fr; }
    }