/* CSS RESET & VARIABLES - Vibrant Trendy Style (浅色时尚潮流风) */
    :root {
      --primary: #4f46e5;
      --primary-gradient: linear-gradient(135deg, #4f46e5 0%, #7c3aed 50%, #ec4899 100%);
      --accent-cyan: #06b6d4;
      --accent-pink: #ec4899;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-subtle: #f1f5f9;
      --text-main: #0f172a;
      --text-muted: #475569;
      --border-color: #e2e8f0;
      --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
      --shadow-md: 0 10px 25px -5px rgba(79, 70, 229, 0.1);
      --shadow-lg: 0 20px 40px -15px rgba(79, 70, 229, 0.2);
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background-color: var(--bg-main);
    }

    /* Container Standard */
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* TYPOGRAPHY */
    h1, h2, h3, h4 {
      color: var(--text-main);
      font-weight: 800;
      line-height: 1.25;
    }

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

    .section-tag {
      display: inline-block;
      padding: 6px 16px;
      background: linear-gradient(90deg, rgba(79,70,229,0.1), rgba(236,72,153,0.1));
      color: var(--primary);
      font-weight: 700;
      font-size: 0.875rem;
      border-radius: 50px;
      text-transform: uppercase;
      margin-bottom: 12px;
      letter-spacing: 1px;
      border: 1px solid rgba(79, 70, 229, 0.2);
    }

    .section-title {
      font-size: 2.25rem;
      background: linear-gradient(135deg, #0f172a 0%, #334155 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .section-subtitle {
      color: var(--text-muted);
      font-size: 1.05rem;
      margin-top: 10px;
      max-width: 700px;
      margin-left: auto;
      margin-right: auto;
    }

    /* HEADER & NAV */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      transition: var(--transition);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 40px;
      width: auto;
    }

    .brand-title {
      font-size: 1.35rem;
      font-weight: 900;
      background: var(--primary-gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* Nav Links rule: gap set to 0 strictly */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-weight: 600;
      font-size: 0.92rem;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: rgba(79, 70, 229, 0.05);
    }

    .nav-cta-btn {
      display: inline-flex;
      align-items: center;
      padding: 10px 22px;
      background: var(--primary-gradient);
      color: #ffffff !important;
      font-weight: 700;
      border-radius: 50px;
      text-decoration: none;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
      transition: var(--transition);
    }

    .nav-cta-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(79, 70, 229, 0.5);
    }

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

    /* HERO SECTION (STRICT: NO IMAGES AT ALL) */
    .hero-section {
      padding: 90px 0 70px;
      position: relative;
      background: radial-gradient(circle at 50% 0%, rgba(79, 70, 229, 0.08) 0%, rgba(236, 72, 153, 0.03) 50%, transparent 100%);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: rgba(255, 255, 255, 0.9);
      border: 1px solid rgba(79, 70, 229, 0.2);
      border-radius: 50px;
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 3rem;
      font-weight: 900;
      letter-spacing: -0.5px;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #0f172a 0%, #4f46e5 50%, #ec4899 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .hero-desc {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 850px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-hero-primary {
      padding: 14px 36px;
      background: var(--primary-gradient);
      color: #fff;
      font-weight: 700;
      font-size: 1.05rem;
      border-radius: 50px;
      text-decoration: none;
      box-shadow: 0 8px 25px rgba(79, 70, 229, 0.35);
      transition: var(--transition);
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 30px rgba(79, 70, 229, 0.45);
    }

    .btn-hero-secondary {
      padding: 14px 36px;
      background: #ffffff;
      color: var(--text-main);
      font-weight: 700;
      font-size: 1.05rem;
      border-radius: 50px;
      text-decoration: none;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .btn-hero-secondary:hover {
      background: var(--bg-subtle);
      border-color: var(--primary);
      color: var(--primary);
    }

    /* DATA METRICS CARDS (HERO BOTTOM) */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      max-width: 1000px;
      margin: 0 auto;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .metric-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 70, 229, 0.3);
    }

    .metric-number {
      font-size: 2rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* SECTION CONTAINERS */
    .page-section {
      padding: 80px 0;
    }

    .bg-white { background-color: #ffffff; }
    .bg-subtle { background-color: var(--bg-subtle); }

    /* MODEL CLOUD BADGES */
    .model-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 8px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 4px rgba(0,0,0,0.02);
      transition: var(--transition);
    }

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

    /* SERVICES GRID (20 MAIN SCENARIOS) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(79, 70, 229, 0.4);
    }

    .service-icon {
      width: 48px;
      height: 48px;
      background: linear-gradient(135deg, rgba(79,70,229,0.1), rgba(236,72,153,0.1));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 20px;
      color: var(--primary);
    }

    .service-title {
      font-size: 1.25rem;
      margin-bottom: 12px;
    }

    .service-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .service-footer {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      display: flex;
      align-items: center;
      gap: 4px;
    }

    /* INDUSTRY & SERVICE NETWORK */
    .network-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .network-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      text-align: center;
    }

    .network-card h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

    .network-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

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

    .step-card {
      background: #ffffff;
      padding: 28px 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      position: relative;
      z-index: 1;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-gradient);
      color: #fff;
      font-weight: 800;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    /* COMPARISON EVALUATION */
    .evaluation-score-box {
      background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
      border: 2px solid rgba(79, 70, 229, 0.2);
      border-radius: var(--radius-lg);
      padding: 30px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-md);
    }

    .score-left {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .big-score {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .stars {
      color: #f59e0b;
      font-size: 1.5rem;
      margin-top: 4px;
    }

    .compare-table-wrap {
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #f1f5f9;
      font-weight: 700;
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-cell {
      background: rgba(79, 70, 229, 0.04);
      font-weight: 700;
      color: var(--primary);
    }

    /* TOKEN PRICE TABLE */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .price-card {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 30px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .price-card.featured {
      border: 2px solid var(--primary);
      position: relative;
    }

    .price-card.featured::before {
      content: "超值首选";
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: var(--primary-gradient);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 800;
      padding: 2px 14px;
      border-radius: 50px;
    }

    .price-amount {
      font-size: 2.25rem;
      font-weight: 900;
      color: var(--text-main);
      margin: 16px 0;
    }

    /* REVIEWS / TESTIMONIALS (6 USER REVIEWS) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .avatar-circle {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
    }

    .user-info h5 {
      font-size: 1rem;
    }

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

    /* CASE CENTER & IMAGES */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

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

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #e2e8f0;
    }

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

    .case-content {
      padding: 20px;
    }

    /* FAQ ACCORDION (10+ ITEMS) */
    .faq-list {
      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;
    }

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

    .faq-question::after {
      content: "+";
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.2s;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.95rem;
      background: #fafafa;
    }

    .faq-item.active .faq-answer {
      max-height: 200px;
      padding: 16px 24px;
    }

    /* ARTICLES LIST SECTION */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .article-item {
      background: #fff;
      padding: 20px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .article-item a {
      color: var(--text-main);
      font-weight: 600;
      text-decoration: none;
    }

    .article-item a:hover {
      color: var(--primary);
    }

    /* FORM SECTION */
    .contact-form-wrap {
      max-width: 750px;
      margin: 0 auto;
      background: #ffffff;
      padding: 40px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 700;
      font-size: 0.9rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
    }

    .form-row {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: var(--primary-gradient);
      color: #fff;
      font-weight: 700;
      font-size: 1.05rem;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(79, 70, 229, 0.3);
      transition: var(--transition);
    }

    .btn-submit:hover {
      opacity: 0.95;
      transform: translateY(-1px);
    }

    /* FOOTER (EXPLICIT STYLING FOR READABILITY) */
    .site-footer {
      background-color: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      margin-bottom: 16px;
      font-size: 1.05rem;
    }

    .footer-col p, .footer-col a {
      color: #94a3b8;
      text-decoration: none;
      margin-bottom: 8px;
      display: block;
      transition: var(--transition);
    }

    .footer-col a:hover {
      color: #ffffff;
    }

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

    .friend-links-flex a {
      color: #94a3b8;
      background: #1e293b;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.8rem;
      margin: 0;
    }

    .friend-links-flex a:hover {
      color: #ffffff;
      background: var(--primary);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      color: #64748b;
      font-size: 0.85rem;
    }

    .qr-code-box {
      width: 100px;
      height: 100px;
      background: #fff;
      padding: 4px;
      border-radius: 8px;
      margin-top: 10px;
    }

    .qr-code-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    /* FLOATING CUSTOMER SERVICE */
    .float-cs {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 999;
      background: var(--primary-gradient);
      color: #fff;
      width: 54px;
      height: 54px;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 20px rgba(79, 70, 229, 0.4);
      text-decoration: none;
      font-size: 1.5rem;
      transition: var(--transition);
    }

    .float-cs:hover {
      transform: scale(1.1);
    }

    /* RESPONSIVE MEDIA QUERIES */
    @media (max-width: 1024px) {
      .services-grid, .reviews-grid, .cases-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .metrics-grid, .network-grid, .process-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .hero-title {
        font-size: 2rem;
      }
      .services-grid, .reviews-grid, .cases-grid, .price-grid, .articles-grid, .network-grid, .process-steps, .metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .evaluation-score-box {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
    }