:root {
      --primary-yellow: #FFD000;
      --primary-yellow-hover: #E6BC00;
      --primary-yellow-light: #FFFBEB;
      --primary-yellow-border: #FDE68A;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-light: #64748B;
      --bg-main: #FFFFFF;
      --bg-alt: #F8FAFC;
      --bg-card: #FFFFFF;
      --border-color: #E2E8F0;
      --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }

    * {
      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;
      color: var(--text-main);
      background-color: var(--bg-main);
    }

    body {
      line-height: 1.6;
      background-color: var(--bg-main);
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      border-bottom: 2px solid var(--primary-yellow);
      box-shadow: var(--shadow-sm);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      max-height: 48px;
    }

    .brand-logo img.ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-title span {
      background-color: var(--primary-yellow);
      padding: 2px 6px;
      border-radius: var(--radius-sm);
      margin-left: 4px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 20px;
      list-style: none;
    }

    .nav-item a {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-muted);
      transition: color 0.2s ease;
      padding: 6px 10px;
      border-radius: var(--radius-sm);
    }

    .nav-item a:hover,
    .nav-item a.active {
      color: var(--text-main);
      background-color: var(--primary-yellow-light);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      font-weight: 700;
      padding: 10px 20px;
      border-radius: var(--radius-md);
      cursor: pointer;
      transition: all 0.2s ease;
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-yellow {
      background-color: var(--primary-yellow);
      color: #000000;
      box-shadow: 0 4px 10px rgba(255, 208, 0, 0.4);
    }

    .btn-yellow:hover {
      background-color: var(--primary-yellow-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 14px rgba(255, 208, 0, 0.5);
    }

    .btn-outline {
      border-color: var(--text-main);
      color: var(--text-main);
      background: transparent;
    }

    .btn-outline:hover {
      background-color: var(--text-main);
      color: #FFFFFF;
    }

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

    .hero-section {
      background: linear-gradient(180deg, var(--primary-yellow-light) 0%, var(--bg-main) 100%);
      padding: 60px 0 80px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: #000000;
      color: var(--primary-yellow);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.3rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title-highlight {
      background: linear-gradient(120deg, var(--primary-yellow) 0%, var(--primary-yellow) 100%);
      background-repeat: no-repeat;
      background-size: 100% 35%;
      background-position: 0 88%;
    }

    .hero-desc {
      font-size: 1.1rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      line-height: 1.7;
    }

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

    .btn-hero-primary {
      font-size: 1.1rem;
      padding: 14px 32px;
      background-color: var(--primary-yellow);
      color: #000000;
      font-weight: 800;
      border-radius: var(--radius-md);
      box-shadow: 0 6px 20px rgba(255, 208, 0, 0.6);
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .btn-hero-primary:hover {
      background-color: var(--primary-yellow-hover);
      transform: translateY(-3px);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
    }

    .stat-item h4 {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--text-main);
    }

    .stat-item p {
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .hero-visual-card {
      background-color: #0F172A;
      color: #FFFFFF;
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-lg);
      border: 2px solid var(--primary-yellow);
      position: relative;
    }

    .visual-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
      padding-bottom: 15px;
      margin-bottom: 20px;
    }

    .visual-dots {
      display: flex;
      gap: 6px;
    }

    .visual-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background-color: rgba(255, 255, 255, 0.2);
    }

    .visual-dot.yellow { background-color: var(--primary-yellow); }

    .model-matrix-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 12px;
      margin-bottom: 20px;
    }

    .matrix-box {
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.1);
      padding: 12px;
      border-radius: var(--radius-sm);
    }

    .matrix-box .title {
      font-size: 0.8rem;
      color: var(--primary-yellow);
      font-weight: 700;
      margin-bottom: 4px;
    }

    .matrix-box .val {
      font-size: 0.95rem;
      font-weight: 600;
    }

    .visual-console-log {
      background: rgba(0, 0, 0, 0.4);
      padding: 12px;
      border-radius: var(--radius-sm);
      font-family: monospace;
      font-size: 0.8rem;
      color: #94A3B8;
      border-left: 3px solid var(--primary-yellow);
    }

    .visual-console-log span.highlight {
      color: var(--primary-yellow);
    }

    .section {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-bg-alt {
      background-color: var(--bg-alt);
    }

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

    .section-tag {
      display: inline-block;
      background-color: var(--primary-yellow-light);
      color: #854D0E;
      border: 1px solid var(--primary-yellow-border);
      padding: 4px 12px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 12px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .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 {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
    }

    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary-yellow);
    }

    .card-icon {
      width: 50px;
      height: 50px;
      border-radius: var(--radius-md);
      background-color: var(--primary-yellow-light);
      color: #000000;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      font-weight: 800;
      margin-bottom: 20px;
      border: 1px solid var(--primary-yellow-border);
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card-text {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 20px;
    }

    .tag-item {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

    .tag-item:hover {
      background-color: var(--primary-yellow);
      border-color: var(--primary-yellow);
      color: #000000;
    }

    .comparison-table-wrapper {
      overflow-x: auto;
      background-color: #FFFFFF;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

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

    .comparison-table th {
      background-color: var(--bg-alt);
      font-weight: 800;
      color: var(--text-main);
    }

    .comparison-table th.highlight-col,
    .comparison-table td.highlight-col {
      background-color: var(--primary-yellow-light);
      font-weight: 700;
      color: #000000;
      border-left: 2px solid var(--primary-yellow);
      border-right: 2px solid var(--primary-yellow);
    }

    .score-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background-color: #000000;
      color: var(--primary-yellow);
      padding: 6px 16px;
      border-radius: 20px;
      font-size: 1.1rem;
      font-weight: 900;
      margin-bottom: 15px;
    }

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

    .step-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-num {
      position: absolute;
      top: -15px;
      left: 20px;
      background-color: var(--primary-yellow);
      color: #000000;
      width: 32px;
      height: 32px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 0.9rem;
      box-shadow: var(--shadow-sm);
    }

    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-top: 30px;
    }

    .media-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-card img {
      width: 100%;
      height: 240px;
      object-fit: cover;
      display: block;
    }

    .media-card-body {
      padding: 20px;
    }

    .banner-strip-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .banner-strip-item img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .review-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background-color: var(--primary-yellow);
      color: #000000;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
    }

    .review-meta h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .review-meta p {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .review-rating {
      color: #F59E0B;
      font-size: 0.9rem;
      margin-bottom: 10px;
    }

    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

    .faq-item {
      background-color: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background-color: #FFFFFF;
      transition: background-color 0.2s ease;
    }

    .faq-question:hover {
      background-color: var(--primary-yellow-light);
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      transition: transform 0.2s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
      background-color: var(--bg-alt);
    }

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

    .form-box {
      background-color: #FFFFFF;
      border: 2px solid var(--primary-yellow);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-lg);
    }

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

    .form-label {
      display: block;
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .form-input, 
    .form-select, 
    .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: var(--bg-alt);
      outline: none;
      transition: border-color 0.2s ease, background-color 0.2s ease;
    }

    .form-input:focus, 
    .form-select:focus, 
    .form-textarea:focus {
      border-color: #000000;
      background-color: #FFFFFF;
      box-shadow: 0 0 0 2px var(--primary-yellow);
    }

    .contact-info-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .contact-info-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .contact-info-icon {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background-color: var(--primary-yellow);
      color: #000000;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .qr-container {
      margin-top: 24px;
      padding: 20px;
      background-color: var(--bg-alt);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      text-align: center;
    }

    .qr-container img {
      max-width: 160px;
      height: auto;
      border-radius: var(--radius-sm);
      margin-bottom: 10px;
      border: 1px solid var(--border-color);
    }

    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .article-link-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-sm);
      font-size: 0.9rem;
      transition: all 0.2s ease;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .article-link-card:hover {
      border-color: var(--primary-yellow);
      background-color: var(--primary-yellow-light);
    }

    .site-footer {
      background-color: #0F172A;
      color: #94A3B8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 4px solid var(--primary-yellow);
    }

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

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 20px;
      position: relative;
    }

    .footer-col h4::after {
      content: '';
      display: block;
      width: 30px;
      height: 2px;
      background-color: var(--primary-yellow);
      margin-top: 8px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      color: #94A3B8;
      transition: color 0.2s ease;
    }

    .footer-links a:hover {
      color: var(--primary-yellow);
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 15px;
    }

    .friend-links-wrap a {
      color: #CBD5E1;
      background-color: rgba(255, 255, 255, 0.05);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
    }

    .friend-links-wrap a:hover {
      background-color: var(--primary-yellow);
      color: #000000;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 25px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    .ai-page-home-link {
      display: inline-block;
      color: #000000;
      background-color: var(--primary-yellow);
      padding: 4px 12px;
      border-radius: var(--radius-sm);
      font-weight: 700;
    }

    .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-color: #000000;
      color: var(--primary-yellow);
      border: 2px solid var(--primary-yellow);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 1.2rem;
      cursor: pointer;
      box-shadow: var(--shadow-lg);
      transition: all 0.2s ease;
    }

    .float-btn:hover {
      background-color: var(--primary-yellow);
      color: #000000;
      transform: scale(1.1);
    }

    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-3 { grid-template-columns: repeat(2, 1fr); }
      .step-timeline { grid-template-columns: repeat(2, 1fr); gap: 30px; }
      .banner-strip-container { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }

    @media (max-width: 768px) {
      .hero-grid { grid-template-columns: 1fr; }
      .grid-3, .grid-2 { grid-template-columns: 1fr; }
      .review-grid { grid-template-columns: 1fr; }
      .media-gallery-grid { grid-template-columns: 1fr; }
      .article-links-grid { grid-template-columns: 1fr; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: #FFFFFF;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 2px solid var(--primary-yellow);
      }
      .nav-menu.show { display: flex; }
      .menu-toggle { display: block; }
      .nav-actions { display: none; }
      .hero-title { font-size: 1.8rem; }
      .footer-grid { grid-template-columns: 1fr; }
    }