:root {
      --primary: #2563eb;
      --primary-hover: #1d4ed8;
      --secondary: #0ea5e9;
      --accent: #f97316;
      --text-dark: #0f172a;
      --text-body: #334155;
      --text-muted: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --bg-light: #f1f5f9;
      --border-color: #e2e8f0;
      --radius: 12px;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 12px rgba(15,23,42,0.08);
      --shadow-lg: 0 12px 30px rgba(15,23,42,0.12);
      --container-max: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-body);
      line-height: 1.6;
      overflow-x: hidden;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .brand-logo img {
      max-height: 40px;
      width: auto;
      object-fit: contain;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-links li a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-body);
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s, background-color 0.2s;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background-color: #eff6ff;
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 15px;
      font-weight: 600;
      border-radius: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      text-align: center;
      line-height: 1.2;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, #1e40af 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(37, 99, 235, 0.25);
    }
    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary-hover) 0%, #1e3a8a 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
    }
    .btn-secondary {
      background-color: #ffffff;
      color: var(--primary);
      border: 1px solid #bfdbfe;
    }
    .btn-secondary:hover {
      background-color: #eff6ff;
      border-color: var(--primary);
      transform: translateY(-1px);
    }
    .btn-outline {
      background-color: transparent;
      color: var(--text-dark);
      border: 1px solid var(--border-color);
    }
    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }
    .mobile-menu-toggle {
      display: none;
      background: transparent;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-dark);
      margin: 5px 0;
      transition: 0.3s;
    }
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #f0f7ff 0%, #ffffff 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-content {
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: #e0f2fe;
      border: 1px solid #bae6fd;
      color: #0369a1;
      font-size: 14px;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .stat-val {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
      line-height: 1;
    }
    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
      font-weight: 500;
    }
    .section-padding {
      padding: 72px 0;
    }
    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background-color: #eff6ff;
      padding: 4px 12px;
      border-radius: 4px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-dark);
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .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: 32px;
      align-items: center;
    }
    .card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      position: relative;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    .card-icon {
      width: 48px;
      height: 48px;
      background: #eff6ff;
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 18px;
      font-weight: bold;
    }
    .card-title {
      font-size: 19px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 14px;
    }
    .badge-tag {
      font-size: 12px;
      background: var(--bg-light);
      padding: 3px 8px;
      border-radius: 4px;
      color: var(--text-muted);
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease;
    }
    .media-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .media-img-wrap {
      width: 100%;
      background: #f1f5f9;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }
    .media-body {
      padding: 20px;
    }
    .media-title {
      font-size: 17px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .media-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .step-list {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-item {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      position: relative;
    }
    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .step-item h3 {
      font-size: 17px;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .step-item p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.5;
    }
    .rating-banner {
      background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
      color: #ffffff;
      padding: 32px;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }
    .rating-score {
      font-size: 48px;
      font-weight: 900;
      color: #fbbf24;
      line-height: 1;
    }
    .rating-stars {
      color: #fbbf24;
      font-size: 20px;
      margin-bottom: 4px;
    }
    .table-container {
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .compare-table th {
      background: #f8fafc;
      color: var(--text-dark);
      font-weight: 600;
    }
    .compare-table tr:last-child td {
      border-bottom: none;
    }
    .highlight-col {
      background-color: #f0f7ff;
      font-weight: 600;
      color: var(--primary);
    }
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
      background-color: #f8fafc;
      font-family: inherit;
    }
    .form-control:focus {
      border-color: var(--primary);
      background-color: #ffffff;
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }
    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background-color 0.2s;
    }
    .faq-question:hover {
      background-color: #f8fafc;
    }
    .faq-arrow {
      font-size: 16px;
      transition: transform 0.2s;
      color: var(--text-muted);
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
      color: var(--primary);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background-color: #ffffff;
    }
    .faq-answer-inner {
      padding: 0 24px 20px 24px;
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .user-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #e2e8f0;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
    }
    .user-info h4 {
      font-size: 15px;
      color: var(--text-dark);
    }
    .user-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .review-text {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.6;
    }
    .qr-box {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding: 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      max-width: 200px;
      margin: 0 auto;
    }
    .qr-box img {
      width: 140px;
      height: 140px;
      object-fit: contain;
      margin-bottom: 10px;
      border-radius: 6px;
    }
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: #ffffff;
      padding: 16px 20px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      transition: border-color 0.2s, transform 0.2s;
    }
    .article-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }
    .article-title {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-dark);
    }
    .article-link {
      font-size: 13px;
      color: var(--primary);
      font-weight: 600;
    }
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 14px;
      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: #ffffff;
      font-size: 16px;
      font-weight: 600;
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: #94a3b8;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      align-items: center;
    }
    .footer-friend-links a {
      color: #94a3b8;
      font-size: 13px;
      transition: color 0.2s;
    }
    .footer-friend-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;
    }
    .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: #ffffff;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: all 0.2s ease;
      font-weight: bold;
    }
    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.05);
    }
    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .step-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 8px;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
      }
      .nav-actions {
        width: 100%;
        margin-top: 16px;
        flex-direction: column;
      }
      .nav-actions .btn {
        width: 100%;
      }
      .hero-title {
        font-size: 28px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .grid-3, .grid-4, .grid-2 {
        grid-template-columns: 1fr;
      }
      .step-list {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }