:root {
      --primary: #10b981;
      --primary-dark: #059669;
      --primary-light: #ecfdf5;
      --primary-accent: #34d399;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
      --shadow-md: 0 4px 12px rgba(16, 185, 129, 0.08);
      --shadow-lg: 0 10px 25px -5px rgba(0,0,0,0.06), 0 8px 10px -6px rgba(0,0,0,0.04);
      --radius: 12px;
      --transition: all 0.25s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-page);
    }

    body {
      line-height: 1.6;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
      background: linear-gradient(180deg, #f0fdf4 0%, #f8fafc 400px, #f8fafc 100%);
    }

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

    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
    }

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

    .brand-logo {
      display: flex;
      align-items: center;
      height: 40px;
    }

    .brand-logo img {
      max-height: 38px;
      width: auto;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      padding: 8px 12px;
      color: var(--text-main);
      text-decoration: none;
      font-weight: 500;
      font-size: 14px;
      transition: var(--transition);
      border-radius: 6px;
    }

    .nav-links li a:hover {
      color: var(--primary-dark);
      background-color: var(--primary-light);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      border-radius: 8px;
      font-size: 14px;
      font-weight: 600;
      text-decoration: none;
      cursor: pointer;
      transition: var(--transition);
      border: 1px solid transparent;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-1px);
    }

    .btn-outline {
      border-color: var(--primary);
      color: var(--primary-dark);
      background: transparent;
    }

    .btn-outline:hover {
      background-color: var(--primary-light);
    }

    .btn-lg {
      padding: 14px 32px;
      font-size: 16px;
      border-radius: 10px;
    }

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

    .hero-section {
      padding: 70px 0 50px;
      text-align: center;
      position: relative;
    }

    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      border-radius: 20px;
      border: 1px solid #a7f3d0;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 38px;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.25;
      margin-bottom: 18px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary-dark);
      position: relative;
      display: inline-block;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }

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

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

    .hero-stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .stat-number {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .stat-text {
      font-size: 13px;
      color: var(--text-muted);
    }

    section {
      padding: 60px 0;
    }

    .section-header {
      text-align: center;
      max-width: 700px;
      margin: 0 auto 40px;
    }

    .section-badge {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 28px;
      font-weight: 700;
      color: #0f172a;
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 15px;
      color: var(--text-muted);
    }

    .platform-tags-cloud {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 24px;
      padding: 20px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
    }

    .model-tag {
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 6px;
      border: 1px solid #d1fae5;
    }

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

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

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      border-color: var(--primary-accent);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .service-card h3 {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 10px;
      color: #0f172a;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .service-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .media-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .media-card-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background-color: #f1f5f9;
      overflow: hidden;
    }

    .media-card-img-wrap.square {
      aspect-ratio: 1 / 1;
    }

    .media-card-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .media-card:hover .media-card-img-wrap img {
      transform: scale(1.03);
    }

    .media-card-body {
      padding: 18px;
    }

    .media-card-body h3 {
      font-size: 16px;
      margin-bottom: 6px;
    }

    .media-card-body p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .rating-banner {
      background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .rating-info h3 {
      font-size: 22px;
      margin-bottom: 6px;
      color: #ffffff;
    }

    .rating-info p {
      color: #a7f3d0;
      font-size: 14px;
    }

    .rating-score-box {
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      padding: 12px 24px;
      border-radius: 10px;
      text-align: center;
    }

    .rating-score {
      font-size: 32px;
      font-weight: 800;
      color: #34d399;
      line-height: 1;
    }

    .rating-stars {
      color: #fbbf24;
      font-size: 14px;
      margin-top: 4px;
    }

    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .compare-table th, .compare-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background: #f8fafc;
      font-weight: 700;
      color: #0f172a;
    }

    .compare-table tr:hover {
      background: #f0fdf4;
    }

    .badge-check {
      display: inline-block;
      color: var(--primary-dark);
      font-weight: bold;
    }

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

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

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 14px;
      font-size: 14px;
    }

    .step-item h3 {
      font-size: 16px;
      margin-bottom: 8px;
    }

    .step-item p {
      font-size: 13px;
      color: var(--text-muted);
    }

    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-quote {
      font-size: 13.5px;
      color: #334155;
      line-height: 1.65;
      margin-bottom: 16px;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 10px;
      border-top: 1px solid #f1f5f9;
      padding-top: 12px;
    }

    .author-avatar {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .author-meta h4 {
      font-size: 13px;
      margin-bottom: 2px;
    }

    .author-meta span {
      font-size: 12px;
      color: var(--text-muted);
    }

    .faq-list {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .faq-question {
      width: 100%;
      padding: 16px 20px;
      text-align: left;
      background: none;
      border: none;
      outline: none;
      font-size: 15px;
      font-weight: 600;
      color: #0f172a;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      transition: var(--transition);
    }

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

    .faq-arrow {
      font-size: 14px;
      color: var(--text-muted);
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #ffffff;
    }

    .faq-answer-inner {
      padding: 0 20px 16px;
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      max-width: 760px;
      margin: 0 auto;
      box-shadow: var(--shadow-sm);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      margin-bottom: 18px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group.full-width {
      grid-column: span 2;
    }

    .form-group label {
      font-size: 13px;
      font-weight: 600;
      color: #334155;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background-color: #f8fafc;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--primary);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    .contact-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .contact-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
    }

    .contact-box h4 {
      font-size: 15px;
      margin-bottom: 6px;
    }

    .contact-box p {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

    .qr-container {
      width: 120px;
      height: 120px;
      padding: 6px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .qr-container img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    .articles-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      text-decoration: none;
      color: var(--text-main);
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary);
      background-color: #f0fdf4;
      transform: translateX(4px);
    }

    .article-title {
      font-size: 14px;
      font-weight: 500;
    }

    .article-tag {
      font-size: 12px;
      background: #f1f5f9;
      color: #64748b;
      padding: 2px 8px;
      border-radius: 4px;
    }

    footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 50px 0 20px;
      margin-top: 40px;
      font-size: 13px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 16px;
      margin-bottom: 12px;
    }

    .footer-brand p {
      line-height: 1.6;
      margin-bottom: 14px;
    }

    .footer-links-col h4 {
      color: #ffffff;
      font-size: 14px;
      margin-bottom: 12px;
    }

    .footer-links-col ul {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-col a {
      color: #94a3b8;
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-links-col a:hover {
      color: #34d399;
    }

    .friend-links {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      margin-bottom: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .friend-links span {
      color: #64748b;
    }

    .friend-links a {
      color: #94a3b8;
      text-decoration: none;
      transition: var(--transition);
    }

    .friend-links a:hover {
      color: #34d399;
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      color: #64748b;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 10px;
    }

    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.15);
      cursor: pointer;
      text-decoration: none;
      transition: var(--transition);
      border: none;
    }

    .float-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.08);
    }

    .float-qr-panel {
      display: none;
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 10px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-lg);
      width: 140px;
      text-align: center;
    }

    .float-qr-panel img {
      width: 100%;
      height: auto;
      display: block;
    }

    .float-qr-panel span {
      font-size: 11px;
      color: var(--text-main);
      margin-top: 4px;
      display: block;
    }

    .floating-contact:hover .float-qr-panel {
      display: block;
    }

    @media (max-width: 992px) {
      .cards-grid-4 { grid-template-columns: repeat(2, 1fr); }
      .cards-grid-3 { grid-template-columns: repeat(2, 1fr); }
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .step-grid { grid-template-columns: repeat(2, 1fr); }
      .testimonials-grid { grid-template-columns: repeat(1, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .contact-grid { grid-template-columns: 1fr; }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .cards-grid-4, .cards-grid-3 {
        grid-template-columns: 1fr;
      }
      .step-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .hero-title {
        font-size: 28px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }