:root {
      --primary: #10B981;
      --primary-hover: #059669;
      --primary-light: #ECFDF5;
      --primary-mint: #D1FAE5;
      --accent: #064E3B;
      --text-main: #1F2937;
      --text-muted: #4B5563;
      --text-light: #9CA3AF;
      --bg-page: #F7FAF8;
      --bg-card: #FFFFFF;
      --border-color: #E2E8F0;
      --border-light: #F1F5F9;
      --shadow-sm: 0 2px 4px rgba(16, 185, 129, 0.04);
      --shadow-md: 0 4px 12px rgba(16, 185, 129, 0.08);
      --shadow-lg: 0 10px 25px rgba(16, 185, 129, 0.12);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.25s ease-in-out;
    }

    * {
      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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      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, 0.96);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(16, 185, 129, 0.15);
      transition: var(--transition);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
    }

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

    .nav-wrapper {
      display: flex;
      align-items: center;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-item {
      display: inline-block;
      padding: 6px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

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

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

    .btn-portal {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      font-size: 0.9rem;
      font-weight: 600;
      color: #FFFFFF;
      background: linear-gradient(135deg, #10B981, #059669);
      border-radius: 50px;
      box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
    }

    .btn-portal:hover {
      background: linear-gradient(135deg, #059669, #047857);
      transform: translateY(-1px);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
      color: var(--accent);
    }

    .mobile-menu-toggle svg {
      width: 26px;
      height: 26px;
    }

    .hero-section {
      position: relative;
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #E6F7F0 0%, #F7FAF8 100%);
      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;
      padding: 6px 14px;
      background-color: var(--primary-mint);
      color: var(--accent);
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 20px;
      border: 1px solid rgba(16, 185, 129, 0.3);
    }

    .hero-badge .dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      animation: pulse 1.8s infinite;
    }

    @keyframes pulse {
      0% { transform: scale(0.9); opacity: 0.8; }
      50% { transform: scale(1.3); opacity: 1; }
      100% { transform: scale(0.9); opacity: 0.8; }
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: #064E3B;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .btn-main-official {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 14px 32px;
      font-size: 1.05rem;
      font-weight: 700;
      color: #FFFFFF;
      background: linear-gradient(135deg, #10B981, #047857);
      border-radius: 8px;
      box-shadow: 0 8px 20px rgba(16, 185, 129, 0.35);
      border: none;
    }

    .btn-main-official:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(16, 185, 129, 0.45);
    }

    .btn-secondary {
      display: inline-flex;
      align-items: center;
      padding: 14px 28px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--accent);
      background-color: #FFFFFF;
      border: 1px solid var(--primary);
      border-radius: 8px;
    }

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

    .hero-trust-bar {
      display: flex;
      align-items: center;
      gap: 20px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .hero-panel {
      background: #FFFFFF;
      border: 1px solid rgba(16, 185, 129, 0.2);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-md);
      position: relative;
    }

    .panel-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      margin-bottom: 16px;
      border-bottom: 1px solid var(--border-light);
    }

    .panel-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--accent);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .panel-status {
      font-size: 0.8rem;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 3px 10px;
      border-radius: 20px;
      font-weight: 600;
    }

    .panel-features {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .feature-row {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .feature-icon-box {
      width: 34px;
      height: 34px;
      border-radius: 8px;
      background: var(--primary-mint);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .feature-content h4 {
      font-size: 0.95rem;
      color: var(--text-main);
      margin-bottom: 2px;
    }

    .feature-content p {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-light);
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 14px;
      border-radius: 20px;
      margin-bottom: 10px;
      letter-spacing: 1px;
      text-transform: uppercase;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: #064E3B;
      margin-bottom: 12px;
      line-height: 1.3;
    }

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

    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: -30px;
      margin-bottom: 60px;
      position: relative;
      z-index: 10;
    }

    .metric-card {
      background: #FFFFFF;
      padding: 24px 20px;
      border-radius: var(--radius-md);
      border: 1px solid rgba(16, 185, 129, 0.15);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .metric-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }

    .metric-tip {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    .models-tags-wrap {
      background: #FFFFFF;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      margin-bottom: 40px;
    }

    .models-tags-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .models-chip-list {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .model-chip {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      color: var(--text-muted);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.82rem;
      font-weight: 500;
      transition: var(--transition);
    }

    .model-chip:hover {
      background: var(--primary-mint);
      border-color: var(--primary);
      color: var(--accent);
    }

    .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: 28px;
    }

    .service-card {
      background: #FFFFFF;
      padding: 28px 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .service-head {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .service-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      font-weight: bold;
    }

    .service-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: #064E3B;
    }

    .service-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .service-features {
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .service-feature-item {
      font-size: 0.82rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .service-feature-item::before {
      content: "✔";
      color: var(--primary);
      font-size: 0.8rem;
    }

    .img-banner-box {
      margin: 30px 0;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

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

    .img-card img {
      width: 100%;
      height: 220px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

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

    .img-caption {
      padding: 14px 18px;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--accent);
      background: #FFFFFF;
    }

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

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

    .step-num {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: #FFFFFF;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
      margin-bottom: 14px;
    }

    .step-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.86rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    .eval-overview-card {
      background: linear-gradient(135deg, #ECFDF5 0%, #FFFFFF 100%);
      border: 2px solid var(--primary-mint);
      border-radius: var(--radius-lg);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      box-shadow: var(--shadow-sm);
    }

    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-badge {
      background: #10B981;
      color: #FFFFFF;
      padding: 16px 24px;
      border-radius: var(--radius-md);
      text-align: center;
    }

    .score-badge .score-val {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1;
    }

    .score-badge .score-max {
      font-size: 0.85rem;
      opacity: 0.9;
    }

    .eval-stars {
      color: #F59E0B;
      font-size: 1.4rem;
      margin-bottom: 4px;
    }

    .eval-title {
      font-size: 1.3rem;
      font-weight: 800;
      color: #064E3B;
      margin-bottom: 4px;
    }

    .eval-sub {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .comparison-table-wrap {
      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: 680px;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      font-size: 0.92rem;
    }

    .comparison-table th {
      background: #F8FAFC;
      color: var(--accent);
      font-weight: 700;
    }

    .comparison-table td:nth-child(2) {
      background-color: rgba(16, 185, 129, 0.04);
      font-weight: 600;
      color: #065F46;
    }

    .comparison-table tr:hover {
      background-color: #F9FBFA;
    }

    .table-badge-best {
      background: var(--primary-mint);
      color: var(--accent);
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      margin-left: 6px;
      font-weight: 700;
    }

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

    .token-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px 22px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }

    .token-card.highlight {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      background: linear-gradient(180deg, #FFFFFF 0%, #F4FBF7 100%);
    }

    .token-badge-top {
      position: absolute;
      top: -12px;
      right: 20px;
      background: var(--primary);
      color: #FFFFFF;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 20px;
    }

    .token-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--accent);
      margin-bottom: 8px;
    }

    .token-price-box {
      margin: 16px 0;
      padding: 14px;
      background: var(--bg-page);
      border-radius: var(--radius-sm);
    }

    .token-price-now {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--primary);
    }

    .token-price-old {
      font-size: 0.85rem;
      color: var(--text-light);
      text-decoration: line-through;
      margin-left: 8px;
    }

    .token-list {
      margin-bottom: 20px;
      display: flex;
      flex-direction: column;
      gap: 8px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      font-size: 1rem;
      color: var(--accent);
      user-select: none;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.25s ease;
      color: var(--primary);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #FFFFFF;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.65;
    }

    .faq-item.active .faq-answer {
      padding: 0 24px 20px 24px;
      max-height: 300px;
    }

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

    .review-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;
    }

    .review-stars {
      color: #F59E0B;
      font-size: 0.95rem;
      margin-bottom: 12px;
    }

    .review-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

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

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-mint);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 0.95rem;
    }

    .author-info h5 {
      font-size: 0.92rem;
      color: var(--text-main);
    }

    .author-info span {
      font-size: 0.78rem;
      color: var(--text-light);
    }

    .contact-form-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 36px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

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

    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--accent);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #FFFFFF;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
      font-weight: 700;
      color: #FFFFFF;
      background: linear-gradient(135deg, #10B981, #059669);
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      transition: var(--transition);
    }

    .btn-submit:hover {
      background: linear-gradient(135deg, #059669, #047857);
    }

    .contact-info-panel {
      background: var(--bg-page);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .info-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 20px;
    }

    .info-item {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    .qr-box {
      text-align: center;
      background: #FFFFFF;
      padding: 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .qr-box img {
      max-width: 130px;
      margin: 0 auto 8px;
    }

    .qr-box p {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .news-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .news-item {
      background: #FFFFFF;
      padding: 18px 22px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }

    .news-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }

    .news-item h4 {
      font-size: 0.96rem;
      color: var(--text-main);
      font-weight: 600;
    }

    .news-link-btn {
      color: var(--primary);
      font-size: 0.88rem;
      font-weight: 600;
      white-space: nowrap;
    }

    .site-footer {
      background: #064E3B;
      color: #E2E8F0;
      padding: 50px 0 24px;
      border-top: 3px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 32px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #FFFFFF;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-col h4::after {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      width: 28px;
      height: 2px;
      background: var(--primary);
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.88rem;
    }

    .footer-links a {
      color: #CBD5E1;
    }

    .footer-links a:hover {
      color: #34D399;
      padding-left: 4px;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 0.84rem;
      color: #94A3B8;
    }

    .friend-links-box {
      margin-top: 20px;
      padding-top: 16px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.84rem;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      align-items: center;
    }

    .friend-links-box a {
      color: #A7F3D0;
    }

    .friend-links-box a:hover {
      text-decoration: underline;
    }

    .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;
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--primary-mint);
      cursor: pointer;
      transition: var(--transition);
      position: relative;
    }

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

    .qr-tooltip {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #FFFFFF;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .float-btn:hover .qr-tooltip {
      display: block;
    }

    .qr-tooltip img {
      width: 100%;
      height: auto;
      margin-bottom: 4px;
    }

    .qr-tooltip span {
      font-size: 0.72rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    @media (max-width: 992px) {
      .hero-grid, .contact-form-grid {
        grid-template-columns: 1fr;
      }
      .grid-3, .grid-4, .metrics-grid, .workflow-timeline, .token-grid, .testimonials-grid, .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .nav-links {
        display: none;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        padding: 20px;
        box-shadow: var(--shadow-lg);
        border-bottom: 1px solid var(--border-color);
      }
      .mobile-menu-toggle {
        display: block;
      }
      .img-banner-box {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 640px) {
      .grid-3, .grid-4, .metrics-grid, .workflow-timeline, .token-grid, .testimonials-grid, .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .eval-overview-card {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
      .eval-score-box {
        flex-direction: column;
        gap: 12px;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 10px;
        text-align: center;
      }
    }