:root {
      --primary: #0284c7;
      --primary-hover: #0369a1;
      --primary-light: #e0f2fe;
      --accent: #f97316;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-subtle: #f1f5f9;
      --border-color: #e2e8f0;
      --border-focus: #38bdf8;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 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: 10px;
      --radius-lg: 16px;
      --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, "Noto Sans", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    header.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);
    }

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

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .brand-logo-img {
      max-height: 40px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      padding: 6px 10px;
      border-radius: var(--radius-sm);
      transition: color 0.2s, background-color 0.2s;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 18px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      text-decoration: none;
      transition: all 0.2s ease;
      cursor: pointer;
      border: 1px solid transparent;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 2px 4px rgba(2, 132, 199, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      box-shadow: 0 4px 8px rgba(2, 132, 199, 0.35);
      transform: translateY(-1px);
    }

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

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

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

    .btn-accent:hover {
      background-color: #ea580c;
      transform: translateY(-1px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* Section Styles */
    section {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 45px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .section-badge {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 12px;
      border-radius: 9999px;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
    }

    /* Hero Section (No Images Allowed) */
    .hero-section {
      background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f8fafc 100%);
      padding: 90px 0 80px 0;
      position: relative;
    }

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

    .hero-content h1 {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.2;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-content h1 span {
      color: var(--primary);
    }

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

    .hero-btn-group {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 30px;
    }

    .hero-btn-official {
      padding: 12px 28px;
      font-size: 1.05rem;
    }

    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .hero-tag-item {
      background: rgba(255, 255, 255, 0.8);
      border: 1px solid var(--border-color);
      padding: 4px 10px;
      border-radius: var(--radius-sm);
    }

    .hero-visual-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-lg);
    }

    .model-chip-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 10px;
      margin-top: 15px;
    }

    .model-chip {
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      padding: 8px 10px;
      border-radius: var(--radius-sm);
      text-align: center;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      border-color: var(--primary);
      background: var(--primary-light);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* Metrics Strip */
    .metrics-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      position: relative;
      z-index: 10;
    }

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

    .metric-value {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* Grid Layouts */
    .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;
    }

    .cards-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
      display: flex;
      flex-direction: column;
    }

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

    .service-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .service-badge {
      font-size: 0.75rem;
      padding: 2px 6px;
      border-radius: 4px;
      background: var(--primary-light);
      color: var(--primary);
    }

    .service-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

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

    .media-img-wrap {
      width: 100%;
      background: var(--bg-subtle);
      border-bottom: 1px solid var(--border-color);
    }

    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
    }

    .media-body {
      padding: 20px;
    }

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

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

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

    .step-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* Evaluation Section */
    .eval-box {
      background: var(--bg-card);
      border: 2px solid var(--primary-light);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-md);
    }

    .eval-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 16px;
    }

    .eval-rating {
      display: flex;
      align-items: baseline;
      gap: 12px;
    }

    .eval-score {
      font-size: 2.8rem;
      font-weight: 900;
      color: var(--accent);
      line-height: 1;
    }

    .eval-stars {
      font-size: 1.25rem;
      color: var(--accent);
      font-weight: 700;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

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

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

    .eval-table th {
      background-color: var(--bg-subtle);
      color: var(--text-main);
      font-weight: 700;
    }

    .eval-table tr:hover {
      background-color: #fafbfc;
    }

    .badge-win {
      color: #16a34a;
      font-weight: 700;
    }

    /* Testimonials */
    .testimonial-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testi-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 18px;
    }

    .testi-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .testi-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .testi-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .testi-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* FAQ Panel */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background: var(--bg-card);
      user-select: none;
    }

    .faq-question:hover {
      background-color: var(--bg-subtle);
    }

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

    .faq-answer {
      padding: 0 24px 18px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      display: none;
    }

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

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

    /* Form & Contact */
    .contact-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
    }

    .form-box {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      color: var(--text-main);
      background-color: #fff;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
    }

    .contact-info-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .qr-container {
      text-align: center;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-md);
    }

    .qr-container img {
      max-width: 160px;
      height: auto;
      display: inline-block;
      border-radius: var(--radius-sm);
    }

    .contact-detail-item {
      display: flex;
      flex-direction: column;
      font-size: 0.95rem;
    }

    .contact-detail-label {
      font-weight: 600;
      color: var(--text-light);
      font-size: 0.85rem;
    }

    .contact-detail-val {
      font-weight: 700;
      color: var(--text-main);
      margin-top: 2px;
    }

    /* Articles & Links */
    .article-list {
      list-style: none;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
    }

    .article-item a {
      display: block;
      padding: 12px 16px;
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.92rem;
      font-weight: 500;
      transition: all 0.2s;
    }

    .article-item a:hover {
      border-color: var(--primary);
      color: var(--primary);
      padding-left: 20px;
    }

    /* Footer */
    footer.site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 45px 0 25px 0;
      color: var(--text-muted);
    }

    .footer-content-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
    }

    .footer-brand h4 {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      line-height: 1.6;
    }

    .footer-links-col h5 {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .friend-links-wrap a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      background: var(--bg-subtle);
      padding: 4px 10px;
      border-radius: 4px;
      transition: color 0.2s, background 0.2s;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
    }

    /* Float Service & Back to Top */
    .float-widget {
      position: fixed;
      right: 20px;
      bottom: 25px;
      z-index: 990;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-main);
      text-decoration: none;
      font-weight: 700;
      font-size: 0.85rem;
      transition: all 0.2s;
    }

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

    /* Responsive */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .metrics-strip {
        grid-template-columns: repeat(2, 1fr);
        margin-top: 20px;
      }
      .cards-grid-4, .step-list {
        grid-template-columns: repeat(2, 1fr);
      }
      .cards-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-content-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px;
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .cards-grid-3, .cards-grid-2, .cards-grid-4, .step-list, .article-list {
        grid-template-columns: 1fr;
      }
      .hero-content h1 {
        font-size: 1.85rem;
      }
      .metrics-strip {
        grid-template-columns: 1fr;
      }
    }