/* CSS Variables & Light Holographic Theme */
    :root {
      --bg-main: #f8fafc;
      --bg-card: rgba(255, 255, 255, 0.85);
      --bg-card-solid: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --border-color: rgba(226, 232, 240, 0.9);
      --border-holo: linear-gradient(135deg, #c084fc, #6366f1, #38bdf8);
      
      --accent-purple: #9333ea;
      --accent-blue: #2563eb;
      --accent-cyan: #0891b2;
      --accent-pink: #ec4899;

      --holo-gradient: linear-gradient(135deg, #a855f7 0%, #6366f1 50%, #06b6d4 100%);
      --holo-btn-bg: linear-gradient(135deg, #9333ea 0%, #4f46e5 50%, #2563eb 100%);
      --holo-pill-bg: linear-gradient(135deg, rgba(168, 85, 247, 0.1), rgba(99, 102, 241, 0.1), rgba(6, 182, 212, 0.1));
      
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(99, 102, 241, 0.12);
      --shadow-lg: 0 16px 36px -6px rgba(147, 51, 234, 0.18);

      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;

      --max-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: 
        radial-gradient(circle at 10% 10%, rgba(168, 85, 247, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 90% 20%, rgba(6, 182, 212, 0.08) 0%, transparent 40%),
        radial-gradient(circle at 50% 80%, rgba(99, 102, 241, 0.06) 0%, transparent 50%),
        #f8fafc;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    /* Container Standard */
    .container {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 24px;
    }

    a {
      color: var(--accent-blue);
      text-decoration: none;
      transition: all 0.25s ease;
    }

    a:hover {
      color: var(--accent-purple);
    }

    /* Holographic Badges & Text */
    .holo-text {
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      font-weight: 700;
    }

    .holo-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      border-radius: 99px;
      background: #ffffff;
      border: 1px solid rgba(168, 85, 247, 0.3);
      box-shadow: 0 2px 10px rgba(168, 85, 247, 0.1);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--accent-purple);
      margin-bottom: 12px;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 26px;
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      font-weight: 600;
      cursor: pointer;
      border: none;
      transition: all 0.3s ease;
      text-align: center;
    }

    .btn-primary {
      background: var(--holo-btn-bg);
      color: #ffffff !important;
      box-shadow: var(--shadow-md);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
      opacity: 0.95;
    }

    .btn-outline {
      background: #ffffff;
      color: var(--text-main) !important;
      border: 1px solid rgba(99, 102, 241, 0.3);
      box-shadow: var(--shadow-sm);
    }

    .btn-outline:hover {
      background: rgba(243, 244, 246, 0.8);
      border-color: var(--accent-purple);
      transform: translateY(-2px);
    }

    /* Header & Navigation */
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }

    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    /* Rule check: .nav-links gap must be 0 */
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }

    .nav-links li a {
      display: block;
      padding: 8px 12px;
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      background: rgba(168, 85, 247, 0.08);
      color: var(--accent-purple);
    }

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

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

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

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px auto;
    }

    .section-header h2 {
      font-size: 2.2rem;
      font-weight: 800;
      letter-spacing: -0.02em;
      margin-bottom: 12px;
      color: var(--text-main);
    }

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

    /* Section 1: HERO (Strictly NO Images inside Hero) */
    #home {
      padding: 90px 0 70px 0;
      text-align: center;
      background: radial-gradient(ellipse at top, rgba(168, 85, 247, 0.12), transparent 70%);
    }

    .hero-content {
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-content h1 {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      letter-spacing: -0.03em;
      margin: 16px 0 20px 0;
      color: #0f172a;
    }

    .hero-subtitle {
      font-size: 1.25rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 20px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      backdrop-filter: blur(10px);
    }

    .stat-number {
      font-size: 1.8rem;
      font-weight: 800;
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .stat-label {
      font-size: 0.85rem;
      color: var(--text-light);
      margin-top: 4px;
    }

    /* Cards Grid */
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

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

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(168, 85, 247, 0.4);
    }

    .card-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--holo-pill-bg);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      color: var(--accent-purple);
    }

    .card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

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

    /* Tags Pills */
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid rgba(203, 213, 225, 0.8);
      padding: 6px 14px;
      border-radius: 99px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 1px 3px rgba(0,0,0,0.03);
    }

    /* Flow / Process */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--holo-gradient);
      color: #ffffff;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px auto;
    }

    /* Comparison Section (9.9 Score + 5 Stars) */
    .rating-banner {
      background: linear-gradient(135deg, rgba(147, 51, 234, 0.06), rgba(37, 99, 235, 0.06));
      border: 1px solid rgba(168, 85, 247, 0.25);
      border-radius: var(--radius-lg);
      padding: 32px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      margin-bottom: 36px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-score {
      text-align: center;
    }

    .rating-score .num {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
      background: var(--holo-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .rating-stars {
      color: #f59e0b;
      font-size: 1.5rem;
      margin-top: 6px;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

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

    th {
      background: #f1f5f9;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .highlight-col {
      background: rgba(168, 85, 247, 0.04);
      font-weight: 600;
      color: var(--accent-purple);
    }

    /* FAQ Accordion */
    .faq-list {
      max-width: 860px;
      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;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 24px;
      background: none;
      border: none;
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .faq-answer {
      padding: 0 24px 20px 24px;
      font-size: 0.92rem;
      color: var(--text-muted);
      display: none;
      line-height: 1.7;
    }

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

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

    /* Reviews Section */
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
    }

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

    /* Form Design */
    .form-box {
      max-width: 720px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 36px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid rgba(203, 213, 225, 0.9);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: border 0.25s;
    }

    .form-control:focus {
      border-color: var(--accent-purple);
      box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.15);
    }

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

    /* Contact Info Row */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .qr-container {
      text-align: center;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
    }

    .qr-container img {
      max-width: 180px;
      height: auto;
      border-radius: 8px;
    }

    /* Media Assets Display */
    .media-card img {
      border-radius: var(--radius-sm);
      display: block;
      width: 100%;
      height: auto;
      object-fit: cover;
    }

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

    .footer-content {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #f8fafc;
      font-size: 1rem;
      margin-bottom: 16px;
    }

    .footer-col p, .footer-col a {
      color: #94a3b8;
      font-size: 0.88rem;
      line-height: 1.8;
    }

    .footer-col a:hover {
      color: #ffffff;
    }

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

    .friendship-links a {
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      color: #cbd5e1;
      font-size: 0.82rem;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      border-top: 1px solid #1e293b;
      font-size: 0.85rem;
    }

    /* Floating Widget */
    .float-widget {
      position: fixed;
      right: 24px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--holo-btn-bg);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      cursor: pointer;
      font-size: 1.2rem;
    }

    /* Articles Section */
    .article-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .article-item {
      padding: 12px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

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

    @media (max-width: 768px) {
      .hero-content h1 { font-size: 2rem; }
      .hero-stats { grid-template-columns: repeat(2, 1fr); }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .flow-steps { grid-template-columns: 1fr; }
      .contact-grid { grid-template-columns: 1fr; }
      .footer-content { grid-template-columns: 1fr; }
      
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 0;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }

      .nav-links.active {
        display: flex;
      }

      .mobile-toggle {
        display: block;
      }
    }