:root {
      --primary-teal: #0fa392;
      --primary-dark: #0a7367;
      --primary-light: #e6f6f4;
      --primary-gradient: linear-gradient(135deg, #0fa392 0%, #16b9a6 50%, #0d8274 100%);
      --bg-main: #f5f9f8;
      --bg-surface: #ffffff;
      --bg-subtle: #edf5f4;
      --text-main: #142825;
      --text-muted: #4e6460;
      --text-light: #7b9490;
      --border-color: #d6e8e5;
      --border-hover: #16b9a6;
      --shadow-sm: 0 2px 8px rgba(15, 163, 146, 0.06);
      --shadow-md: 0 8px 24px rgba(15, 163, 146, 0.08);
      --shadow-lg: 0 16px 36px rgba(15, 163, 146, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --max-width: 1200px;
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      min-width: 320px;
    }

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

    .container {
      width: 100%;
      max-width: var(--max-width);
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.03);
    }

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

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

    .brand-wrap .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-name {
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

    .brand-badge {
      font-size: 0.75rem;
      background: var(--primary-light);
      color: var(--primary-dark);
      padding: 2px 8px;
      border-radius: 999px;
      font-weight: 600;
    }

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      padding: 10px 14px;
      display: inline-block;
      border-radius: 6px;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 600;
      padding: 10px 22px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
      font-size: 0.95rem;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(15, 163, 146, 0.28);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(15, 163, 146, 0.38);
    }

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

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

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

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    .hero-section {
      background: radial-gradient(circle at 80% 20%, #e1f5f2 0%, #f4f9f8 60%), linear-gradient(180deg, #ffffff 0%, #f2f8f7 100%);
      padding: 84px 0 64px;
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 999px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--primary-dark);
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-tagline::before {
      content: "";
      width: 8px;
      height: 8px;
      background: var(--primary-teal);
      border-radius: 50%;
      box-shadow: 0 0 0 3px rgba(15, 163, 146, 0.2);
    }

    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.7;
    }

    .hero-cta-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      margin-bottom: 36px;
    }

    .btn-large {
      padding: 13px 30px;
      font-size: 1.05rem;
      border-radius: var(--radius-md);
    }

    .hero-trust-list {
      display: flex;
      flex-wrap: wrap;
      gap: 18px;
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .hero-trust-item {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .hero-trust-item svg {
      color: var(--primary-teal);
      width: 16px;
      height: 16px;
    }

    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .card-header-bar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding-bottom: 16px;
      margin-bottom: 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .status-indicator {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-dark);
    }

    .status-dot {
      width: 8px;
      height: 8px;
      background: #10b981;
      border-radius: 50%;
    }

    .matrix-title {
      font-size: 0.9rem;
      color: var(--text-light);
    }

    .model-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 24px;
    }

    .model-pill {
      font-size: 0.82rem;
      font-weight: 600;
      padding: 6px 12px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: var(--text-main);
    }

    .model-pill.active {
      background: var(--primary-light);
      border-color: var(--primary-teal);
      color: var(--primary-dark);
    }

    .metric-stats-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
    }

    .metric-card {
      background: #fbfdfc;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-md);
    }

    .metric-value {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-head {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 52px;
    }

    .section-subtitle {
      display: inline-block;
      color: var(--primary-teal);
      font-weight: 700;
      font-size: 0.9rem;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 2.15rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.02rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }

    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 22px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
      position: relative;
    }

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

    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-weight: bold;
      font-size: 1.3rem;
      margin-bottom: 20px;
    }

    .card-title {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .card-text {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.65;
      flex-grow: 1;
    }

    .card-tag {
      display: inline-block;
      margin-top: 16px;
      font-size: 0.8rem;
      color: var(--primary-dark);
      font-weight: 600;
      background: var(--bg-subtle);
      padding: 4px 10px;
      border-radius: 4px;
      align-self: flex-start;
    }

    .about-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .about-lead {
      font-size: 1.15rem;
      color: var(--text-main);
      margin-bottom: 24px;
      font-weight: 600;
      line-height: 1.7;
    }

    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

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

    .step-number {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary-teal);
      opacity: 0.4;
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    .gallery-container {
      display: grid;
      grid-template-columns: 1.5fr 1fr;
      gap: 24px;
      align-items: stretch;
    }

    .gallery-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .gallery-img-wrap {
      width: 100%;
      background: #eef5f4;
      overflow: hidden;
      aspect-ratio: 16 / 9;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .gallery-info {
      padding: 20px;
    }

    .gallery-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

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

    .banner-showcase {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-top: 30px;
    }

    .banner-box {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: #fff;
    }

    .banner-box img {
      width: 100%;
      height: auto;
      display: block;
    }

    .rating-banner {
      background: linear-gradient(135deg, #0fa392 0%, #095c52 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      margin-bottom: 36px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      box-shadow: var(--shadow-lg);
    }

    .rating-score {
      font-size: 4rem;
      font-weight: 900;
      line-height: 1;
      letter-spacing: -2px;
    }

    .rating-stars {
      color: #fbbf24;
      font-size: 1.6rem;
      margin-top: 6px;
    }

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

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

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

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

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

    .compare-highlight {
      font-weight: 700;
      color: var(--primary-dark);
      background: var(--primary-light);
    }

    .token-table th {
      background: #edf6f5;
    }

    .badge-eco {
      background: #dcfce7;
      color: #15803d;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 700;
    }

    .review-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;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-quote {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      position: relative;
    }

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

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

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

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

    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--primary-teal);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.05rem;
      color: var(--text-main);
      user-select: none;
    }

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

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.28s ease;
      color: var(--primary-teal);
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fbfdfd;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .faq-answer-inner {
      padding: 0 24px 20px 24px;
      border-top: 1px dashed var(--border-color);
      padding-top: 16px;
    }

    .contact-container {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 36px;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      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-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background: #fdfefe;
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary-teal);
      box-shadow: 0 0 0 3px rgba(15, 163, 146, 0.15);
    }

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

    .contact-info-panel {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      display: flex;
      flex-direction: column;
      gap: 24px;
    }

    .contact-meta-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }

    .contact-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-light);
      color: var(--primary-dark);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .qrcode-box {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      text-align: center;
    }

    .qrcode-box img {
      max-width: 150px;
      height: auto;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      padding: 6px;
      background: #fff;
      display: inline-block;
    }

    .articles-block {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 24px;
    }

    .articles-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 12px;
      list-style: none;
    }

    .articles-links-list a {
      font-size: 0.9rem;
      color: var(--primary-dark);
      background: var(--primary-light);
      padding: 6px 14px;
      border-radius: 6px;
      font-weight: 500;
    }

    .articles-links-list a:hover {
      background: var(--primary-teal);
      color: #fff;
    }

    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 32px;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.5fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 36px;
    }

    .footer-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

    .footer-nav a {
      color: var(--text-muted);
    }

    .footer-nav a:hover {
      color: var(--primary-dark);
    }

    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-group {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-group a {
      color: var(--text-muted);
      font-size: 0.88rem;
    }

    .friend-links-group a:hover {
      color: var(--primary-dark);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    .float-widget {
      position: fixed;
      right: 24px;
      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-dark);
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary-gradient);
      color: #ffffff;
      border-color: transparent;
      transform: translateY(-2px);
    }

    @media (max-width: 992px) {
      .hero-grid,
      .gallery-container,
      .contact-container,
      .footer-grid {
        grid-template-columns: 1fr;
      }

      .grid-3,
      .review-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .grid-4,
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }

      .banner-showcase {
        grid-template-columns: 1fr;
      }

      .hero-title {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-btn {
        display: block;
      }

      .nav-links {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-lg);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
      }

      .nav-links.open {
        max-height: 480px;
        padding: 16px 0;
      }

      .nav-links li a {
        padding: 12px 24px;
        display: block;
      }

      .grid-3,
      .grid-4,
      .grid-2,
      .review-grid,
      .process-timeline,
      .metric-stats-grid {
        grid-template-columns: 1fr;
      }

      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }

      .hero-title {
        font-size: 1.85rem;
      }

      .hero-cta-group {
        flex-direction: column;
        align-items: stretch;
      }

      .hero-cta-group .btn {
        width: 100%;
      }
    }