:root {
      --primary-color: #00b060;
      --primary-dark: #008f4c;
      --primary-light: #e8f9f0;
      --accent-color: #10d876;
      --text-main: #1f2937;
      --text-muted: #4b5563;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e5e7eb;
      --shadow-sm: 0 2px 4px rgba(0, 176, 96, 0.05);
      --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 10px 25px rgba(0, 176, 96, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --container-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, "PingFang SC", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, #f0fdf4 0%, var(--bg-main) 90%);
      min-height: 100vh;
      overflow-x: hidden;
    }

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

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      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: 10px;
      text-decoration: none;
    }

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

    .nav-links a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 500;
      font-size: 14px;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: color 0.3s, background 0.3s;
      white-space: nowrap;
    }

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

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

    .btn-nav-primary {
      display: inline-flex;
      align-items: center;
      background: var(--primary-color);
      color: #ffffff !0important;
      padding: 8px 18px;
      font-size: 14px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      text-decoration: none;
      transition: background 0.3s, transform 0.2s;
    }

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

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

    /* Common Components */
    .section-block {
      padding: 70px 0;
    }

    .section-block.alt-bg {
      background: #ffffff;
      border-top: 1px solid #f0f0f0;
      border-bottom: 1px solid #f0f0f0;
    }

    .section-header {
      text-align: center;
      margin-bottom: 40px;
    }

    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary-color);
      background: var(--primary-light);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      color: #111827;
      margin-bottom: 12px;
      font-weight: 800;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      padding: 90px 0 70px;
      background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 50%, #f0fdf4 100%);
      border-bottom: 1px solid rgba(0, 176, 96, 0.15);
      position: relative;
    }

    .hero-content {
      text-align: center;
      max-width: 880px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #ffffff;
      border: 1px solid var(--accent-color);
      color: var(--primary-dark);
      padding: 6px 16px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-h1 {
      font-size: 40px;
      line-height: 1.3;
      font-weight: 900;
      color: #0f2e1e;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 18px;
      color: #374151;
      margin-bottom: 35px;
      line-height: 1.6;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .btn-hero-main {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-color);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: var(--radius-md);
      text-decoration: none;
      box-shadow: 0 6px 20px rgba(0, 176, 96, 0.35);
      transition: all 0.3s;
    }

    .btn-hero-main:hover {
      background: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0, 176, 96, 0.45);
    }

    .btn-hero-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      font-size: 16px;
      font-weight: 600;
      padding: 14px 28px;
      border-radius: var(--radius-md);
      text-decoration: none;
      transition: all 0.3s;
    }

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

    .hero-metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .metric-card {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(0, 176, 96, 0.15);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

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

    .metric-label {
      font-size: 13px;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Model Badges Grid */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 25px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid #d1fae5;
      color: #065f46;
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 12px;
      font-weight: 600;
      box-shadow: var(--shadow-sm);
    }

    /* Grid Layouts */
    .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;
      align-items: center;
    }

    /* Service Cards */
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary-color);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: bold;
      margin-bottom: 18px;
    }

    .service-title {
      font-size: 18px;
      font-weight: 700;
      color: #111827;
      margin-bottom: 10px;
    }

    .service-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* Process Flow */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-badge {
      display: inline-block;
      width: 32px;
      height: 32px;
      background: var(--primary-color);
      color: #ffffff;
      border-radius: 50%;
      text-align: center;
      line-height: 32px;
      font-weight: bold;
      font-size: 14px;
      margin-bottom: 14px;
    }

    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* Comparison Table */
    .comparison-wrapper {
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 600px;
    }

    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .comparison-table th {
      background: #f9fafb;
      font-weight: 700;
      color: #374151;
    }

    .comparison-table th.highlight,
    .comparison-table td.highlight {
      background: #f0fdf4;
      color: #065f46;
      font-weight: 600;
    }

    .rating-banner {
      background: linear-gradient(135deg, #065f46 0%, #00b060 100%);
      color: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .rating-info h3 {
      font-size: 20px;
      margin-bottom: 4px;
    }

    .rating-score {
      font-size: 32px;
      font-weight: 800;
      color: #fef08a;
    }

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

    .media-card-img-wrap {
      width: 100%;
      height: 220px;
      background: #f3f4f6;
      overflow: hidden;
    }

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

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

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

    .media-card-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

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

    /* Testimonials */
    .testimonial-card {
      background: #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;
    }

    .testimonial-quote {
      font-size: 14px;
      color: #374151;
      margin-bottom: 16px;
      line-height: 1.6;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f3f4f6;
      padding-top: 12px;
    }

    .user-avatar {
      width: 40px;
      height: 40px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: bold;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }

    .user-meta h4 {
      font-size: 14px;
      font-weight: 700;
    }

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

    /* FAQ Accordion */
    .faq-container {
      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: var(--radius-sm);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item:hover {
      border-color: var(--primary-color);
    }

    .faq-question {
      padding: 18px 20px;
      font-size: 15px;
      font-weight: 700;
      color: #111827;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-toggle-icon {
      font-size: 18px;
      color: var(--primary-color);
      transition: transform 0.2s;
    }

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

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

    .faq-answer-inner {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Form & Contact */
    .form-wrapper {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 6px;
      color: #374151;
    }

    .form-input,
    .form-select,
    .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
      background: #fff;
    }

    .form-input:focus,
    .form-select:focus,
    .form-textarea:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(0, 176, 96, 0.15);
    }

    .btn-submit {
      width: 100%;
      background: var(--primary-color);
      color: #ffffff;
      border: none;
      padding: 14px;
      font-size: 16px;
      font-weight: 700;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: background 0.2s;
    }

    .btn-submit:hover {
      background: var(--primary-dark);
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      height: 100%;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .contact-list {
      list-style: none;
      margin-top: 20px;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .contact-list li {
      font-size: 14px;
      color: #374151;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .qr-container {
      margin-top: 24px;
      display: flex;
      align-items: center;
      gap: 20px;
      background: var(--primary-light);
      padding: 16px;
      border-radius: var(--radius-md);
    }

    .qr-img {
      width: 100px;
      height: 100px;
      background: #fff;
      padding: 4px;
      border-radius: 4px;
    }

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

    /* Links & Footer */
    .links-block {
      margin-top: 30px;
      padding-top: 20px;
      border-top: 1px solid var(--border-color);
    }

    .links-title {
      font-size: 14px;
      font-weight: 700;
      color: #374151;
      margin-bottom: 10px;
    }

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

    .links-flex a {
      font-size: 13px;
      color: var(--text-muted);
      text-decoration: none;
      transition: color 0.2s;
    }

    .links-flex a:hover {
      color: var(--primary-color);
      text-decoration: underline;
    }

    .site-footer {
      background: #111827;
      color: #9ca3af;
      padding: 40px 0 20px;
      border-top: 3px solid var(--primary-color);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 30px;
    }

    .footer-brand h4 {
      color: #ffffff;
      font-size: 18px;
      margin-bottom: 12px;
    }

    .footer-brand p {
      font-size: 13px;
      line-height: 1.6;
      max-width: 380px;
    }

    .footer-col h5 {
      color: #ffffff;
      font-size: 14px;
      margin-bottom: 12px;
    }

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

    .footer-col a {
      color: #9ca3af;
      text-decoration: none;
      font-size: 13px;
      transition: color 0.2s;
    }

    .footer-col a:hover {
      color: var(--accent-color);
    }

    .footer-bottom {
      border-top: 1px solid #1f2937;
      padding-top: 20px;
      text-align: center;
      font-size: 12px;
      color: #6b7280;
    }

    /* Floating Customer Service & Back Top */
    .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: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      font-size: 18px;
      cursor: pointer;
      text-decoration: none;
      transition: background 0.2s, transform 0.2s;
    }

    .float-btn:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .float-btn.primary {
      background: var(--primary-color);
      color: #ffffff;
    }

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

    /* Responsive */
    @media (max-width: 992px) {
      .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }

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

      .mobile-menu-btn {
        display: block;
      }

      .grid-3, .grid-4, .grid-2 {
        grid-template-columns: 1fr;
      }

      .process-timeline {
        grid-template-columns: 1fr;
      }

      .hero-h1 {
        font-size: 28px;
      }

      .hero-subtitle {
        font-size: 15px;
      }
    }