/* Neo-Brutalism Design Variables */
    :root {
      --bg: #F9FAFB;
      --card-bg: #FFFFFF;
      --text: #111827;
      --text-muted: #4B5563;
      --border: #111827;
      
      /* Vibrant Accent Colors (撞色) */
      --primary: #2563EB;     /* Electric Blue */
      --secondary: #0D9488;   /* Bright Teal */
      --accent: #EA580C;      /* Sunset Orange */
      --yellow: #FBBF24;      /* Sunny Yellow */
      --purple: #7C3AED;      /* Royal Purple */
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: var(--bg);
      color: var(--text);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* Common Container */
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 1.5rem;
    }

    /* Helper Styles for Neo-Brutalism (Bold borders & strong shadows) */
    .neo-box {
      background: var(--card-bg);
      border: 3px solid var(--border);
      box-shadow: 6px 6px 0px var(--border);
      border-radius: 4px;
      transition: all 0.2s cubic-bezier(0.165, 0.84, 0.44, 1);
    }
    
    .neo-box:hover {
      transform: translate(-3px, -3px);
      box-shadow: 9px 9px 0px var(--border);
    }

    .neo-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0.75rem 1.5rem;
      font-weight: 700;
      text-decoration: none;
      color: var(--text);
      background: var(--yellow);
      border: 3px solid var(--border);
      box-shadow: 4px 4px 0px var(--border);
      border-radius: 4px;
      cursor: pointer;
      transition: all 0.15s ease;
    }

    .neo-btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: 6px 6px 0px var(--border);
    }

    .neo-btn:active {
      transform: translate(2px, 2px);
      box-shadow: 2px 2px 0px var(--border);
    }

    .neo-btn-primary {
      background: var(--primary);
      color: #fff;
    }

    .neo-btn-secondary {
      background: var(--secondary);
      color: #fff;
    }

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

    /* Section Typography & Badges */
    .section-title {
      font-size: 2.25rem;
      font-weight: 900;
      text-align: center;
      margin-bottom: 3rem;
      position: relative;
      display: inline-block;
      left: 50%;
      transform: translateX(-50%);
    }

    .section-title::after {
      content: "";
      position: absolute;
      bottom: -8px;
      left: 10%;
      width: 80%;
      height: 6px;
      background: var(--secondary);
      border: 2px solid var(--border);
      z-index: -1;
    }

    .badge {
      display: inline-block;
      padding: 0.25rem 0.75rem;
      font-size: 0.875rem;
      font-weight: 700;
      border: 2px solid var(--border);
      border-radius: 9999px;
      background: var(--yellow);
      color: var(--text);
      margin-bottom: 1rem;
    }

    /* Grid & Flex Utilities */
    .grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 2rem; }
    .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 2rem; }
    .grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

    @media (max-width: 968px) {
      .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .grid-2 { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .section-title { font-size: 1.75rem; }
    }

    /* Header Nav */
    header {
      background: var(--card-bg);
      border-bottom: 3px solid var(--border);
      position: sticky;
      top: 0;
      z-index: 100;
    }

    .nav-container {
      display: flex;
      justify-content: space-between;
      align-items: center;
      height: 80px;
    }

    .logo-container {
      display: flex;
      align-items: center;
      gap: 0.75rem;
    }

    .ai-page-logo {
      height: 48px;
      width: auto;
    }

    .brand-name {
      font-size: 1.5rem;
      font-weight: 900;
      letter-spacing: -0.5px;
    }

    nav {
      display: flex;
    }

    .nav-link {
      text-decoration: none;
      color: var(--text);
      font-weight: 700;
      font-size: 0.95rem;
      padding: 0.5rem;
      transition: color 0.2s;
    }

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

    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 6px;
      background: none;
      border: none;
      cursor: pointer;
    }

    .menu-toggle span {
      display: block;
      width: 28px;
      height: 3px;
      background-color: var(--border);
      border-radius: 2px;
    }

    @media (max-width: 1024px) {
      nav {
        display: none;
        position: absolute;
        top: 80px;
        left: 0;
        right: 0;
        background: var(--card-bg);
        border-bottom: 3px solid var(--border);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
      }
      nav.active {
        display: flex;
      }
      .menu-toggle {
        display: flex;
      }
    }

    /* Section Padding */
    section {
      padding: 5rem 0;
      border-bottom: 3px solid var(--border);
    }

    /* Hero Section - STRICTLY NO IMAGES in first fold background or content */
    #hero {
      background: radial-gradient(circle at 10% 20%, rgba(37, 99, 235, 0.08) 0%, rgba(251, 191, 36, 0.05) 90.1%);
      padding: 7rem 0 9rem 0;
      text-align: center;
      position: relative;
    }

    .hero-content {
      max-width: 850px;
      margin: 0 auto;
    }

    .hero-h1 {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1.15;
      letter-spacing: -1px;
      margin-bottom: 1.5rem;
      color: var(--text);
    }

    .hero-h1 span {
      background: var(--yellow);
      padding: 0 0.5rem;
      border: 3px solid var(--border);
      display: inline-block;
      transform: rotate(-1deg);
      box-shadow: 4px 4px 0px var(--border);
    }

    .hero-lead {
      font-size: 1.25rem;
      color: var(--text-muted);
      margin-bottom: 2.5rem;
      font-weight: 500;
    }

    .hero-btns {
      display: flex;
      gap: 1.5rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    .hero-btns .neo-btn {
      font-size: 1.1rem;
      padding: 0.9rem 2.2rem;
    }

    /* Stats Indicator */
    .stats-bar {
      margin-top: 5rem;
    }

    .stat-item {
      text-align: center;
      padding: 1.5rem;
    }

    .stat-number {
      font-size: 3rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 0.5rem;
    }

    .stat-label {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-muted);
    }

    /* Section Styling Elements */
    .section-desc {
      text-align: center;
      max-width: 700px;
      margin: -2rem auto 3rem auto;
      color: var(--text-muted);
      font-size: 1.1rem;
    }

    /* Service abilities grid cards */
    .capability-card {
      padding: 2rem;
      position: relative;
    }

    .capability-card .icon-box {
      width: 56px;
      height: 56px;
      background: var(--yellow);
      border: 3px solid var(--border);
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.75rem;
      margin-bottom: 1.5rem;
      box-shadow: 3px 3px 0px var(--border);
    }

    .capability-card h3 {
      font-size: 1.35rem;
      font-weight: 900;
      margin-bottom: 0.75rem;
    }

    .capability-card p {
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* AIGC Production Models Grid */
    .model-badge-container {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 1.5rem;
    }

    .model-badge {
      font-size: 0.8rem;
      font-weight: 700;
      background: #F3F4F6;
      border: 2px solid var(--border);
      padding: 0.2rem 0.5rem;
      border-radius: 4px;
    }

    /* Custom Color Themes per Card for "撞色风" */
    .color-card-1 { border-left: 8px solid var(--primary); }
    .color-card-2 { border-left: 8px solid var(--secondary); }
    .color-card-3 { border-left: 8px solid var(--accent); }
    .color-card-4 { border-left: 8px solid var(--purple); }
    .color-card-5 { border-left: 8px solid var(--yellow); }
    .color-card-6 { border-left: 8px solid #EF4444; }

    /* Steps Area */
    .step-card {
      padding: 2rem;
      position: relative;
    }

    .step-number {
      position: absolute;
      top: -20px;
      left: 20px;
      width: 40px;
      height: 40px;
      background: var(--accent);
      color: #fff;
      font-weight: 900;
      font-size: 1.25rem;
      border: 3px solid var(--border);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 3px 3px 0px var(--border);
    }

    .step-card h3 {
      margin-top: 0.75rem;
      margin-bottom: 0.75rem;
      font-weight: 800;
    }

    /* Comparison Table Style */
    .comparison-table-wrapper {
      overflow-x: auto;
      border: 3px solid var(--border);
      box-shadow: 6px 6px 0px var(--border);
      background: #fff;
      border-radius: 4px;
      margin-bottom: 3rem;
    }

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

    .comparison-table th, .comparison-table td {
      padding: 1.25rem;
      border-bottom: 2px solid var(--border);
      border-right: 2px solid var(--border);
    }

    .comparison-table th:last-child, .comparison-table td:last-child {
      border-right: none;
    }

    .comparison-table th {
      background: #E5E7EB;
      font-weight: 900;
      color: var(--text);
    }

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

    .comparison-table .highlight-col {
      background: rgba(251, 191, 36, 0.15);
      font-weight: 700;
    }

    .comparison-summary {
      background: var(--yellow);
      border: 3px solid var(--border);
      padding: 2rem;
      box-shadow: 6px 6px 0px var(--border);
      border-radius: 4px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1.5rem;
    }

    .rating-badge {
      font-size: 2rem;
      font-weight: 900;
      background: var(--border);
      color: #fff;
      padding: 0.5rem 1rem;
      border-radius: 4px;
    }

    /* Token Price list */
    .price-card {
      padding: 1.5rem;
    }

    .price-value {
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--secondary);
      margin: 0.5rem 0;
    }

    /* Training Area */
    .training-card {
      padding: 2rem;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .training-badge {
      background: var(--primary);
      color: white;
      padding: 0.25rem 0.5rem;
      font-size: 0.8rem;
      font-weight: 800;
      border: 2px solid var(--border);
      align-self: flex-start;
      margin-bottom: 1rem;
    }

    /* Case Section with dynamic imagery */
    .case-card {
      overflow: hidden;
      display: flex;
      flex-direction: column;
    }

    .case-img-container {
      position: relative;
      border-bottom: 3px solid var(--border);
      height: 200px;
      background: #E5E7EB;
      overflow: hidden;
    }

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

    .case-info {
      padding: 1.5rem;
      flex-grow: 1;
    }

    .case-info h4 {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 0.5rem;
    }

    /* Reviews section */
    .review-card {
      padding: 2rem;
      background: #fff;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 1rem;
      margin-bottom: 1rem;
    }

    .reviewer-avatar {
      width: 48px;
      height: 48px;
      background: var(--purple);
      color: white;
      font-weight: 900;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      border: 2px solid var(--border);
    }

    .reviewer-title h5 {
      font-weight: 800;
      font-size: 1rem;
    }

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

    .review-text {
      font-style: italic;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

    /* Form & Contact Area */
    .form-wrapper {
      padding: 3rem;
    }

    .form-group {
      margin-bottom: 1.5rem;
    }

    .form-group label {
      display: block;
      font-weight: 700;
      margin-bottom: 0.5rem;
    }

    .form-control {
      width: 100%;
      padding: 0.75rem 1rem;
      border: 3px solid var(--border);
      border-radius: 4px;
      font-family: inherit;
      font-size: 1rem;
      outline: none;
    }

    .form-control:focus {
      border-color: var(--primary);
      box-shadow: 3px 3px 0 var(--border);
    }

    .contact-details {
      padding: 3rem;
      background: var(--purple);
      color: #fff;
      border: 3px solid var(--border);
      box-shadow: 6px 6px 0px var(--border);
    }

    .contact-details a {
      color: var(--yellow);
      text-decoration: underline;
    }

    .contact-item {
      margin-bottom: 1.5rem;
    }

    .contact-item strong {
      display: block;
      font-size: 1.1rem;
      margin-bottom: 0.25rem;
    }

    .qr-container {
      display: flex;
      gap: 1.5rem;
      flex-wrap: wrap;
      margin-top: 2rem;
    }

    .qr-box {
      background: white;
      color: var(--text);
      padding: 1rem;
      border: 3px solid var(--border);
      text-align: center;
      width: 150px;
    }

    .qr-box img {
      width: 100%;
      height: auto;
      border: 1px solid #ccc;
      margin-bottom: 0.5rem;
    }

    .qr-box span {
      font-size: 0.8rem;
      font-weight: 700;
    }

    /* FAQ accordion styling */
    .faq-item {
      border-bottom: 2px solid var(--border);
    }

    .faq-item:last-child {
      border-bottom: none;
    }

    .faq-trigger {
      width: 100%;
      background: none;
      border: none;
      text-align: left;
      padding: 1.25rem;
      font-size: 1.1rem;
      font-weight: 800;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      color: var(--text);
    }

    .faq-trigger::after {
      content: '+';
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--accent);
      transition: transform 0.2s;
    }

    .faq-item.active .faq-trigger::after {
      content: '-';
      transform: rotate(90deg);
    }

    .faq-content {
      display: none;
      padding: 0 1.25rem 1.25rem 1.25rem;
      color: var(--text-muted);
      font-size: 0.95rem;
    }

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

    /* Articles Section */
    .article-item {
      padding: 1.5rem;
    }

    .article-item h4 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 0.5rem;
    }

    .article-item a {
      color: var(--primary);
      font-weight: 700;
      text-decoration: none;
    }

    .article-item a:hover {
      text-decoration: underline;
    }

    /* Tags Cloud */
    .tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 0.75rem;
      justify-content: center;
      margin-top: 2rem;
    }

    /* Footer */
    footer {
      background: var(--text);
      color: #fff;
      padding: 4rem 0 2rem 0;
      border-top: 3px solid var(--border);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 3rem;
      margin-bottom: 3rem;
    }

    @media (max-width: 768px) {
      .footer-top { grid-template-columns: 1fr; gap: 2rem; }
    }

    .footer-brand h4 {
      font-size: 1.5rem;
      font-weight: 900;
      margin-bottom: 1rem;
    }

    .footer-links h5 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 1rem;
      color: var(--yellow);
    }

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

    .footer-links ul li {
      margin-bottom: 0.5rem;
    }

    .footer-links ul li a {
      color: #D1D5DB;
      text-decoration: none;
      transition: color 0.2s;
    }

    .footer-links ul li a:hover {
      color: var(--yellow);
    }

    .footer-bottom {
      border-top: 2px solid rgba(255, 255, 255, 0.1);
      padding-top: 2rem;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 1.5rem;
      font-size: 0.9rem;
    }

    .friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      margin-top: 1rem;
      padding-top: 1rem;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
    }

    .friend-links a {
      color: #9CA3AF;
      text-decoration: none;
      font-size: 0.85rem;
    }

    .friend-links a:hover {
      color: white;
    }

    /* Fixed Contact Trigger */
    .float-contact {
      position: fixed;
      bottom: 2rem;
      right: 2rem;
      z-index: 99;
      background: var(--yellow);
      border: 3px solid var(--border);
      box-shadow: 4px 4px 0px var(--border);
      padding: 0.75rem 1rem;
      border-radius: 4px;
      font-weight: 800;
      text-decoration: none;
      color: var(--text);
      display: flex;
      align-items: center;
      gap: 0.5rem;
      cursor: pointer;
      transition: all 0.2s;
    }

    .float-contact:hover {
      transform: translateY(-3px);
      box-shadow: 6px 6px 0px var(--border);
    }

@media (max-width: 968px) {
        .grid-5 { grid-template-columns: repeat(3, 1fr) !important; }
      }
      @media (max-width: 640px) {
        .grid-5 { grid-template-columns: 1fr !important; }
      }