/* CSS Standard & Neon-inspired Light Theme (霓虹亮彩 style on crisp canvas) */
    :root {
      --primary: #6366f1;
      --primary-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #ec4899 100%);
      --neon-cyan: #06b6d4;
      --neon-pink: #ec4899;
      --neon-purple: #8b5cf6;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #0f172a;
      --text-sub: #475569;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 6px -1px rgba(99, 102, 241, 0.05);
      --shadow-neon: 0 10px 25px -5px rgba(99, 102, 241, 0.15), 0 0 15px rgba(236, 72, 153, 0.1);
      --radius: 12px;
      --container-max: 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-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }

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

    /* Typography & Neon Accents */
    h1, h2, h3, h4 {
      color: var(--text-main);
      font-weight: 700;
      line-height: 1.3;
    }

    .neon-text {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .neon-badge {
      display: inline-block;
      padding: 4px 12px;
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary);
      border: 1px solid rgba(99, 102, 241, 0.2);
      margin-bottom: 12px;
    }

    .section-title {
      text-align: center;
      margin-bottom: 40px;
    }

    .section-title h2 {
      font-size: 32px;
      margin-top: 8px;
    }

    .section-title p {
      color: var(--text-sub);
      font-size: 16px;
      margin-top: 10px;
    }

    /* Navigation Rules */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0,0,0,0.03);
    }

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

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

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

    .brand-title-text {
      font-size: 20px;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* REQUIRED CSS RULE: .nav-links gap must be 0 */
    .nav-links {
      display: flex;
      gap: 0;
      align-items: center;
      list-style: none;
      margin: 0;
      padding: 0;
    }

    .nav-links li a {
      display: block;
      padding: 8px 12px;
      color: var(--text-sub);
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: all 0.2s ease;
      white-space: nowrap;
    }

    .nav-links li a:hover {
      color: var(--primary);
      text-shadow: 0 0 8px rgba(99, 102, 241, 0.3);
    }

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

    .btn-neon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: 30px;
      background: var(--primary-gradient);
      color: #ffffff !important;
      font-weight: 600;
      text-decoration: none;
      border: none;
      cursor: pointer;
      box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .btn-neon:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(236, 72, 153, 0.4);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: 30px;
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
      font-weight: 600;
      text-decoration: none;
      transition: all 0.2s ease;
    }

    .btn-outline:hover {
      background: rgba(99, 102, 241, 0.08);
      transform: translateY(-2px);
    }

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

    /* SECTION LAYOUT & CARDS */
    section {
      padding: 70px 0;
      position: relative;
    }

    /* Section 1: Hero (NO IMAGES AT ALL as per strict rule) */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 50% 20%, rgba(99, 102, 241, 0.08) 0%, rgba(236, 72, 153, 0.03) 50%, rgba(248, 250, 252, 0) 100%);
      text-align: center;
    }

    .hero-inner {
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-h1 {
      font-size: 40px;
      margin-bottom: 20px;
      line-height: 1.25;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-sub);
      margin-bottom: 35px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-highlights {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 20px;
      margin-top: 50px;
    }

    .hero-stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      position: relative;
      overflow: hidden;
    }

    .hero-stat-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 3px;
      background: var(--primary-gradient);
    }

    .hero-stat-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-neon);
    }

    .stat-number {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
    }

    .stat-label {
      color: var(--text-sub);
      font-size: 14px;
      margin-top: 4px;
    }

    /* Card Grid */
    .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: 28px;
    }

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

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-neon);
      border-color: rgba(99, 102, 241, 0.4);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: rgba(99, 102, 241, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 24px;
      color: var(--primary);
      margin-bottom: 16px;
    }

    .card-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* Tag Cloud */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 15px;
    }

    .tag-item {
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      color: var(--text-sub);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 13px;
      transition: all 0.2s ease;
    }

    .tag-item:hover {
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

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

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

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

    /* Comparison Table */
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .eval-table th {
      background: var(--bg-subtle);
      font-weight: 700;
      color: var(--text-main);
    }

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

    .eval-table .highlight-col {
      background: rgba(99, 102, 241, 0.04);
      font-weight: 600;
      color: var(--primary);
    }

    .rating-banner {
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.08) 0%, rgba(236, 72, 153, 0.08) 100%);
      border: 1px solid rgba(99, 102, 241, 0.2);
      border-radius: var(--radius);
      padding: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 15px;
    }

    .rating-score {
      font-size: 32px;
      font-weight: 900;
      color: var(--neon-pink);
    }

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

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      transition: all 0.2s ease;
    }

    .faq-question {
      width: 100%;
      padding: 20px;
      text-align: left;
      background: none;
      border: none;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-question::after {
      content: "+";
      font-size: 20px;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

    .faq-item.active .faq-question::after {
      transform: rotate(45px);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: var(--bg-main);
      color: var(--text-sub);
      font-size: 14px;
      padding: 0 20px;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 16px 20px 20px 20px;
      border-top: 1px solid var(--border-color);
    }

    /* Reviews Section */
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px solid var(--border-color);
    }

    .avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    /* Form Styling */
    .form-container {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-neon);
      max-width: 800px;
      margin: 0 auto;
    }

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

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      font-size: 14px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: var(--bg-main);
      color: var(--text-main);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }

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

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    /* Contact Details Card */
    .contact-info-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 40px;
    }

    .contact-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius);
      text-align: center;
    }

    /* Media Showcase Images Outside Hero */
    .media-card {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: var(--bg-card);
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    /* Footer Alignment & Safe Styling */
    .site-footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      margin-top: auto;
      border-top: 1px solid #1e293b;
    }

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

    .footer-col h4 {
      color: #f8fafc;
      font-size: 16px;
      margin-bottom: 16px;
    }

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

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

    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: #38bdf8;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 13px;
    }

    .friendly-links-wrap {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid #1e293b;
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      align-items: center;
    }

    .friendly-links-wrap a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 13px;
    }

    .friendly-links-wrap a:hover {
      color: #38bdf8;
    }

    /* Float Service Widget */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      color: var(--primary);
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      text-decoration: none;
      cursor: pointer;
      transition: all 0.2s ease;
    }

    .float-btn:hover {
      background: var(--primary);
      color: #fff;
      transform: scale(1.1);
    }

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

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active {
        display: flex;
      }
      .grid-2, .grid-3, .grid-4, .process-steps {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .hero-h1 {
        font-size: 28px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }