/* Global Reset & Colors (宝蓝明艳风) */
    :root {
      --primary: #0052cc;
      --primary-hover: #0043b4;
      --primary-light: #e6f0ff;
      --secondary: #00c2ff;
      --dark: #0f172a;
      --light-bg: #f8fafc;
      --border-color: #e2e8f0;
      --text: #334155;
      --text-muted: #64748b;
      --white: #ffffff;
      --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, sans-serif;
    }

    body {
      background-color: var(--light-bg);
      color: var(--text);
      line-height: 1.6;
    }

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

    /* Section Styling */
    section {
      padding: 80px 0;
    }

    .section-title-wrap {
      text-align: center;
      margin-bottom: 50px;
    }

    .section-title {
      font-size: 2rem;
      color: var(--dark);
      margin-bottom: 15px;
      position: relative;
      display: inline-block;
    }

    .section-title::after {
      content: '';
      position: absolute;
      bottom: -6px;
      left: 50%;
      transform: translateX(-50%);
      width: 50px;
      height: 4px;
      background-color: var(--primary);
      border-radius: 2px;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1rem;
      max-width: 700px;
      margin: 0 auto;
    }

    /* Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 30px;
      font-size: 1rem;
      font-weight: 600;
      border-radius: 6px;
      transition: all 0.3s ease;
      cursor: pointer;
      text-decoration: none;
      border: none;
    }

    .btn-primary {
      background-color: var(--primary);
      color: var(--white);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(0, 82, 204, 0.2);
    }

    .btn-secondary {
      background-color: var(--white);
      color: var(--primary);
      border: 1px solid var(--primary);
    }

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

    /* Header & Navigation */
    header {
      background-color: rgba(255, 255, 255, 0.95);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1000;
      backdrop-filter: blur(10px);
    }

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

    .logo-area {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .ai-page-logo {
      height: 40px;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .nav-links a {
      text-decoration: none;
      color: var(--text);
      font-size: 0.95rem;
      font-weight: 500;
      transition: color 0.3s;
    }

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

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      cursor: pointer;
    }

    .menu-toggle span {
      width: 25px;
      height: 3px;
      background-color: var(--dark);
      transition: 0.3s;
    }

    /* Hero (No images per guidelines) */
    .hero {
      background: linear-gradient(135deg, #001f54 0%, #0052cc 100%);
      color: var(--white);
      padding: 100px 0 120px 0;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: -50%;
      left: -50%;
      width: 200%;
      height: 200%;
      background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 80%);
      pointer-events: none;
    }

    .hero-content {
      max-width: 900px;
      margin: 0 auto;
      position: relative;
      z-index: 2;
    }

    .hero h1 {
      font-size: 2.8rem;
      line-height: 1.25;
      font-weight: 800;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero p {
      font-size: 1.2rem;
      margin-bottom: 35px;
      opacity: 0.9;
    }

    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 15px;
    }

    .hero .btn-secondary {
      background-color: transparent;
      color: var(--white);
      border-color: rgba(255, 255, 255, 0.4);
    }

    .hero .btn-secondary:hover {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: var(--white);
    }

    /* Stats Grid */
    .stats-section {
      margin-top: -60px;
      padding: 0;
      position: relative;
      z-index: 10;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--white);
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
      padding: 30px;
    }

    .stat-card {
      text-align: center;
      padding: 15px;
      border-right: 1px solid var(--border-color);
    }

    .stat-card:last-child {
      border-right: none;
    }

    .stat-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 5px;
    }

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

    /* Service Grid */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .service-card {
      background-color: var(--white);
      border-radius: 8px;
      padding: 35px 25px;
      border: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: 0 10px 25px rgba(0, 82, 204, 0.08);
      border-color: var(--primary);
    }

    .service-icon {
      font-size: 2rem;
      color: var(--primary);
      margin-bottom: 20px;
    }

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

    .service-desc {
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.5;
    }

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

    .step-item {
      background-color: var(--white);
      padding: 25px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      position: relative;
    }

    .step-number {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary-light);
      position: absolute;
      top: 10px;
      right: 15px;
      line-height: 1;
    }

    .step-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--dark);
      margin-top: 15px;
      margin-bottom: 10px;
    }

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

    /* Solutions Section (Uses landscape images) */
    .solutions-layout {
      display: flex;
      flex-direction: column;
      gap: 50px;
    }

    .solution-row {
      display: flex;
      align-items: center;
      gap: 50px;
    }

    .solution-row:nth-child(even) {
      flex-direction: row-reverse;
    }

    .solution-media {
      flex: 1;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 8px 20px rgba(0,0,0,0.06);
    }

    .solution-media img {
      width: 100%;
      display: block;
      transition: transform 0.5s ease;
    }

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

    .solution-info {
      flex: 1;
    }

    .solution-tag {
      display: inline-block;
      padding: 4px 12px;
      font-size: 0.8rem;
      font-weight: 600;
      background-color: var(--primary-light);
      color: var(--primary);
      border-radius: 20px;
      margin-bottom: 15px;
    }

    .solution-info h3 {
      font-size: 1.8rem;
      color: var(--dark);
      margin-bottom: 15px;
    }

    .solution-info p {
      color: var(--text-muted);
      margin-bottom: 20px;
    }

    .solution-features {
      list-style: none;
    }

    .solution-features li {
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 0.95rem;
    }

    .solution-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: bold;
    }

    /* Grid & Cards for Network, Standards, Training */
    .simple-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .network-card, .standard-card, .training-card {
      background-color: var(--white);
      padding: 30px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .network-card h3, .standard-card h3, .training-card h3 {
      color: var(--dark);
      margin-bottom: 12px;
      font-size: 1.2rem;
    }

    /* Double Section: Case Study (Shows square image + banner) */
    .case-container {
      display: grid;
      grid-template-columns: 1fr 2fr;
      gap: 30px;
    }

    .case-sidebar {
      background-color: var(--white);
      padding: 25px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .case-sidebar img {
      width: 100%;
      border-radius: 6px;
      margin-bottom: 15px;
    }

    .case-main-item {
      background-color: var(--white);
      border-radius: 8px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .case-main-img-wrap {
      max-height: 300px;
      overflow: hidden;
    }

    .case-main-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .case-main-body {
      padding: 30px;
    }

    /* Comparison Table (宝蓝明艳风风格表格) */
    .comparison-table-wrap {
      overflow-x: auto;
      background-color: var(--white);
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 700px;
    }

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

    .comparison-table th {
      background-color: var(--primary-light);
      color: var(--dark);
      font-weight: 700;
    }

    .comparison-table tr:hover td {
      background-color: rgba(0, 82, 204, 0.02);
    }

    .rating-highlight {
      background-color: var(--primary-light);
      padding: 15px;
      border-radius: 6px;
      margin-bottom: 25px;
      border-left: 4px solid var(--primary);
      display: flex;
      justify-content: space-around;
      align-items: center;
      flex-wrap: wrap;
    }

    .rating-item {
      text-align: center;
      padding: 10px;
    }

    .rating-val {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary);
    }

    /* Token Price & Match Panel */
    .token-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .token-card, .price-reference-card {
      background-color: var(--white);
      padding: 30px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
    }

    .token-list {
      list-style: none;
    }

    .token-list li {
      padding: 10px 0;
      border-bottom: 1px dotted var(--border-color);
      display: flex;
      justify-content: space-between;
    }

    /* Help & FAQ Accordion */
    .faq-container {
      display: flex;
      flex-direction: column;
      gap: 15px;
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background-color: var(--white);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      overflow: hidden;
    }

    .faq-question {
      padding: 20px;
      font-weight: 700;
      color: var(--dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      background-color: var(--white);
      transition: background-color 0.2s;
    }

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

    .faq-question::after {
      content: '+';
      font-size: 1.5rem;
      color: var(--primary);
      transition: transform 0.2s;
    }

    .faq-item.active .faq-question::after {
      content: '−';
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background-color: var(--white);
    }

    .faq-answer-content {
      padding: 20px;
      border-top: 1px solid var(--border-color);
      color: var(--text);
      font-size: 0.95rem;
    }

    /* Reviews Section */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .review-card {
      background-color: var(--white);
      padding: 30px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      color: var(--text);
      font-size: 0.95rem;
      margin-bottom: 20px;
      font-style: italic;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .author-info h4 {
      font-size: 0.95rem;
      color: var(--dark);
      font-weight: 700;
    }

    .author-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* Article List */
    .article-section-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 25px;
    }

    .article-card {
      background-color: var(--white);
      border-radius: 8px;
      border: 1px solid var(--border-color);
      overflow: hidden;
      transition: all 0.3s;
    }

    .article-card:hover {
      box-shadow: 0 8px 20px rgba(0,0,0,0.05);
    }

    .article-body {
      padding: 20px;
    }

    .article-date {
      font-size: 0.8rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .article-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--dark);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .article-link {
      color: var(--primary);
      text-decoration: none;
      font-size: 0.9rem;
      font-weight: 600;
    }

    /* Form Design */
    .form-wrap {
      max-width: 800px;
      margin: 0 auto;
      background-color: var(--white);
      padding: 40px;
      border-radius: 12px;
      box-shadow: 0 10px 30px rgba(0,0,0,0.05);
      border: 1px solid var(--border-color);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

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

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      color: var(--dark);
      font-size: 0.9rem;
    }

    .form-control {
      width: 100%;
      padding: 12px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      background-color: var(--light-bg);
      font-family: inherit;
      transition: border-color 0.3s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: var(--white);
    }

    /* Contact Details Block */
    .contact-block {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 30px;
      margin-top: 50px;
    }

    .contact-item-card {
      background-color: var(--white);
      padding: 25px;
      border-radius: 8px;
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .contact-item-card h4 {
      color: var(--dark);
      margin-bottom: 10px;
    }

    .contact-item-card img {
      max-width: 150px;
      margin-top: 15px;
      border-radius: 4px;
    }

    /* Footer */
    footer {
      background-color: #0b1329;
      color: #94a3b8;
      padding: 60px 0 30px 0;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: var(--white);
      margin-bottom: 20px;
      font-size: 1rem;
      font-weight: 700;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      color: #94a3b8;
      text-decoration: none;
      transition: color 0.3s;
    }

    .footer-col ul li a:hover {
      color: var(--white);
    }

    .friend-links-area a {
      display: inline-block;
      margin-right: 12px;
      margin-bottom: 8px;
      color: #94a3b8;
      text-decoration: none;
    }

    .friend-links-area a:hover {
      color: var(--white);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 30px;
      text-align: center;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 15px;
    }

    /* Floating Widget */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 80px;
      display: flex;
      flex-direction: column;
      gap: 10px;
      z-index: 999;
    }

    .floating-btn {
      background-color: var(--primary);
      color: var(--white);
      width: 50px;
      height: 50px;
      border-radius: 50px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 10px rgba(0,0,0,0.15);
      cursor: pointer;
      text-decoration: none;
      position: relative;
    }

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

    .floating-qr-hover {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background: var(--white);
      padding: 15px;
      border-radius: 8px;
      box-shadow: 0 4px 15px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      width: 180px;
      text-align: center;
    }

    .floating-qr-hover img {
      width: 100%;
      height: auto;
    }

    .floating-btn:hover .floating-qr-hover {
      display: block;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .services-grid, .steps-wrap, .simple-grid-3, .reviews-grid, .article-section-grid, .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .stat-card:nth-child(2) {
        border-right: none;
      }
      .token-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: var(--white);
        padding: 20px;
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
        border-top: 1px solid var(--border-color);
      }
      
      .nav-links.active {
        display: flex;
      }

      .menu-toggle {
        display: flex;
      }

      .hero h1 {
        font-size: 2rem;
      }

      .services-grid, .steps-wrap, .simple-grid-3, .reviews-grid, .article-section-grid, .footer-grid, .case-container, .contact-block {
        grid-template-columns: 1fr;
      }

      .solution-row, .solution-row:nth-child(even) {
        flex-direction: column;
      }

      .form-grid {
        grid-template-columns: 1fr;
      }

      .form-group-full {
        grid-column: span 1;
      }

      .stats-grid {
        grid-template-columns: 1fr;
      }

      .stat-card {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
      }

      .stat-card:last-child {
        border-bottom: none;
      }

      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }