/* CSS Variables & Global Reset - 艳色潮流风 / Vibrant Trend Style */
    :root {
      --primary-color: #6366f1;
      --primary-gradient: linear-gradient(135deg, #6366f1 0%, #ec4899 50%, #8b5cf6 100%);
      --accent-color: #ec4899;
      --cyan-accent: #06b6d4;
      --dark-text: #0f172a;
      --muted-text: #475569;
      --light-bg: #f8fafc;
      --card-bg: #ffffff;
      --border-color: rgba(226, 232, 240, 0.8);
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
      --shadow-lg: 0 20px 25px -5px rgba(99, 102, 241, 0.12), 0 10px 10px -5px rgba(236, 72, 153, 0.08);
      --radius-lg: 16px;
      --radius-md: 10px;
      --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-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--light-bg);
      color: var(--dark-text);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      position: relative;
    }

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

    /* Vibrant Background Accent Blobs */
    .bg-blob {
      position: absolute;
      border-radius: 50%;
      filter: blur(80px);
      z-index: -1;
      opacity: 0.35;
      pointer-events: none;
    }
    .blob-1 {
      top: -50px;
      left: 10%;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, #8b5cf6 0%, #ec4899 100%);
    }
    .blob-2 {
      top: 600px;
      right: 5%;
      width: 500px;
      height: 500px;
      background: radial-gradient(circle, #06b6d4 0%, #6366f1 100%);
    }

    /* Header & Navigation */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.6);
      transition: var(--transition);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }
    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }
    .brand-name {
      font-size: 20px;
      font-weight: 800;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.5px;
    }

    /* Strict Constraint: .nav-links gap must be 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      text-decoration: none;
      color: var(--dark-text);
      font-weight: 600;
      font-size: 14px;
      padding: 8px 14px;
      border-radius: 20px;
      transition: var(--transition);
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--primary-color);
      background: rgba(99, 102, 241, 0.08);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-glow {
      background: var(--primary-gradient);
      color: #ffffff !important;
      padding: 10px 22px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 14px;
      text-decoration: none;
      box-shadow: 0 4px 15px rgba(236, 72, 153, 0.3);
      transition: var(--transition);
      border: none;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-glow:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 25px rgba(99, 102, 241, 0.45);
    }
    .btn-outline {
      background: transparent;
      color: var(--dark-text);
      border: 2px solid var(--primary-color);
      padding: 8px 20px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 14px;
      text-decoration: none;
      transition: var(--transition);
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .btn-outline:hover {
      background: var(--primary-color);
      color: #ffffff;
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--dark-text);
      cursor: pointer;
      padding: 5px;
    }

    /* Section Global Styles */
    section {
      padding: 80px 0;
      position: relative;
    }
    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }
    .section-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary-color);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 1px;
      text-transform: uppercase;
      margin-bottom: 12px;
      border: 1px solid rgba(99, 102, 241, 0.2);
    }
    .section-title {
      font-size: 34px;
      font-weight: 800;
      color: var(--dark-text);
      letter-spacing: -0.5px;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--muted-text);
      max-width: 680px;
      margin: 0 auto;
    }

    /* Hero Section - STRICT RULE: NO IMAGES inside Hero */
    .hero-section {
      padding: 100px 0 80px;
      text-align: center;
      background: radial-gradient(circle at 50% 30%, rgba(236, 72, 153, 0.08) 0%, rgba(99, 102, 241, 0.03) 70%);
      overflow: hidden;
    }
    .hero-h1 {
      font-size: 42px;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: var(--dark-text);
    }
    .hero-h1 span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-sub {
      font-size: 18px;
      color: var(--muted-text);
      max-width: 800px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }
    .btn-hero-official {
      background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 100%);
      color: #ffffff;
      padding: 14px 34px;
      border-radius: 40px;
      font-weight: 800;
      font-size: 16px;
      text-decoration: none;
      box-shadow: 0 10px 25px rgba(6, 182, 212, 0.35);
      transition: var(--transition);
    }
    .btn-hero-official:hover {
      transform: translateY(-3px) scale(1.02);
      box-shadow: 0 15px 30px rgba(6, 182, 212, 0.5);
    }

    /* CSS Pure Tech Floating Dashboard Mockup (No Image) */
    .hero-dashboard-mockup {
      max-width: 960px;
      margin: 0 auto;
      background: #ffffff;
      border-radius: 20px;
      border: 1px solid rgba(99, 102, 241, 0.2);
      box-shadow: var(--shadow-lg);
      padding: 30px;
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      text-align: left;
    }
    .dash-stat-card {
      background: rgba(248, 250, 252, 0.8);
      border: 1px solid rgba(226, 232, 240, 0.9);
      border-radius: 14px;
      padding: 20px;
      transition: var(--transition);
    }
    .dash-stat-card:hover {
      transform: translateY(-4px);
      border-color: var(--primary-color);
    }
    .dash-icon {
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: var(--primary-gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 12px;
    }
    .dash-num {
      font-size: 26px;
      font-weight: 800;
      color: var(--dark-text);
    }
    .dash-label {
      font-size: 13px;
      color: var(--muted-text);
      margin-top: 4px;
    }

    /* Model Badges Grid */
    .models-tags-wrap {
      margin-top: 40px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      max-width: 1000px;
      margin-left: auto;
      margin-right: auto;
    }
    .model-tag {
      padding: 6px 14px;
      background: #ffffff;
      border: 1px solid rgba(203, 213, 225, 0.8);
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      color: var(--muted-text);
      transition: var(--transition);
    }
    .model-tag:hover {
      color: var(--primary-color);
      border-color: var(--primary-color);
      background: rgba(99, 102, 241, 0.05);
    }

    /* Cards & Grid Styling */
    .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: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      transition: var(--transition);
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .feature-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(99, 102, 241, 0.4);
    }
    .feature-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 4px;
      background: var(--primary-gradient);
      opacity: 0;
      transition: var(--transition);
    }
    .feature-card:hover::before {
      opacity: 1;
    }
    .card-icon {
      font-size: 32px;
      margin-bottom: 16px;
      display: inline-block;
    }
    .card-title {
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--dark-text);
    }
    .card-desc {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.6;
    }

    /* Comparison Table Section */
    .comparison-table-wrap {
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      overflow-x: auto;
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 640px;
    }
    .comparison-table th, .comparison-table td {
      padding: 18px 24px;
      border-bottom: 1px solid var(--border-color);
    }
    .comparison-table th {
      background: #f8fafc;
      font-size: 15px;
      font-weight: 700;
      color: var(--dark-text);
    }
    .comparison-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-col {
      background: rgba(99, 102, 241, 0.04);
      font-weight: 700;
      color: var(--primary-color);
    }
    .rating-box {
      background: var(--primary-gradient);
      color: #fff;
      padding: 24px;
      border-radius: var(--radius-lg);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-lg);
    }
    .rating-score {
      font-size: 42px;
      font-weight: 900;
      line-height: 1;
    }

    /* Media & Gallery Items */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }
    .gallery-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .gallery-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
    }
    .gallery-img-wrapper {
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
      background: #f1f5f9;
    }
    .ai-page-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }
    .gallery-card:hover .ai-page-image {
      transform: scale(1.05);
    }
    .gallery-info {
      padding: 16px;
    }
    .gallery-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

    /* User Reviews Carousel / Grid */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .user-avatar-text {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .user-meta h4 {
      font-size: 16px;
      font-weight: 700;
    }
    .user-meta p {
      font-size: 12px;
      color: var(--muted-text);
    }
    .review-content {
      font-size: 14px;
      color: var(--muted-text);
      line-height: 1.6;
      font-style: italic;
    }
    .stars {
      color: #f59e0b;
      margin-bottom: 8px;
    }

    /* FAQ Accordion */
    .faq-list {
      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-question {
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 700;
      color: var(--dark-text);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
    }
    .faq-question::after {
      content: "+";
      font-size: 20px;
      font-weight: 400;
      color: var(--primary-color);
      transition: var(--transition);
    }
    .faq-item.active .faq-question::after {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      color: var(--muted-text);
      font-size: 14px;
      line-height: 1.7;
      transition: max-height 0.3s ease, padding 0.3s ease;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px 24px;
    }

    /* Contact Form Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }
    .contact-info-side {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 14px;
    }
    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: rgba(99, 102, 241, 0.1);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }
    .qr-box {
      width: 140px;
      border-radius: 10px;
      overflow: hidden;
      border: 1px solid var(--border-color);
      margin-top: 10px;
    }
    .qr-box img {
      width: 100%;
      height: auto;
      display: block;
    }

    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--dark-text);
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 14px;
      background: #f8fafc;
      transition: var(--transition);
      outline: none;
    }
    .form-control:focus {
      border-color: var(--primary-color);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }

    /* Footer & Friend Links */
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-brand h3 {
      color: #ffffff;
      font-size: 20px;
      margin-bottom: 14px;
    }
    .footer-brand p {
      font-size: 14px;
      line-height: 1.6;
    }
    .footer-col h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .footer-links a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 14px;
      transition: var(--transition);
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .friend-links-box {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      margin-top: 24px;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .friend-links-box span {
      color: #e2e8f0;
      font-size: 14px;
      font-weight: 600;
    }
    .friend-links-box a {
      color: #94a3b8;
      text-decoration: none;
      font-size: 13px;
      transition: var(--transition);
    }
    .friend-links-box a:hover {
      color: #06b6d4;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
    }

    /* Floating Widget */
    .floating-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(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      text-decoration: none;
      font-size: 18px;
      transition: var(--transition);
      cursor: pointer;
    }
    .float-btn:hover {
      transform: scale(1.1);
    }

    /* Responsive Media Queries */
    @media (max-width: 992px) {
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
      }
      .nav-links.show {
        display: flex;
      }
      .hero-h1 {
        font-size: 30px;
      }
      .section-title {
        font-size: 26px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .rating-box {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
    }