/* CSS RESET & VARIABLES */
    :root {
      --bg-color: #faf9f5;
      --card-bg: #ffffff;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --primary: #ffda03; /* Playful Graffiti Yellow */
      --secondary: #06d6a0; /* Mint Turquoise */
      --accent-pink: #ff477e; /* Pop Pink */
      --accent-blue: #118ab2; /* Electric Blue */
      --accent-purple: #8338ec; /* Purple Vivid */
      --border-dark: #1e293b;
      --shadow-graffiti: 4px 4px 0px #1e293b;
      --shadow-hover: 6px 6px 0px #1e293b;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
    }

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

    body {
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

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

    .section-title-wrap {
      text-align: center;
      margin-bottom: 45px;
      position: relative;
    }

    .section-badge {
      display: inline-block;
      background: var(--primary);
      color: var(--border-dark);
      font-weight: 800;
      font-size: 0.85rem;
      padding: 4px 14px;
      border-radius: 50px;
      border: 2px solid var(--border-dark);
      box-shadow: 2px 2px 0 var(--border-dark);
      text-transform: uppercase;
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 10px;
    }

    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 650px;
      margin: 0 auto;
    }

    /* BUTTONS - Vivid Graffiti Style */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 26px;
      font-size: 1rem;
      font-weight: 800;
      border-radius: var(--radius-md);
      border: 2px solid var(--border-dark);
      cursor: pointer;
      transition: all 0.2s ease;
      text-decoration: none;
      gap: 8px;
    }

    .btn-primary {
      background: var(--primary);
      color: var(--border-dark);
      box-shadow: var(--shadow-graffiti);
    }
    .btn-primary:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
    }

    .btn-secondary {
      background: var(--secondary);
      color: var(--border-dark);
      box-shadow: var(--shadow-graffiti);
    }
    .btn-secondary:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
    }

    .btn-pink {
      background: var(--accent-pink);
      color: #fff;
      box-shadow: var(--shadow-graffiti);
    }
    .btn-pink:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
    }

    .btn-outline {
      background: var(--card-bg);
      color: var(--text-main);
      box-shadow: var(--shadow-graffiti);
    }
    .btn-outline:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-hover);
    }

    /* CARDS */
    .graffiti-card {
      background: var(--card-bg);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-graffiti);
      padding: 24px;
      transition: all 0.2s ease;
      position: relative;
    }

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

    /* HEADER & NAV */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(250, 249, 245, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-dark);
    }

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

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

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .ai-page-home-link {
      font-weight: 800;
      font-size: 0.95rem;
      padding: 4px 12px;
      background: #e2e8f0;
      border: 2px solid var(--border-dark);
      border-radius: 6px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0; /* Strictly set gap: 0 as requested */
      list-style: none;
    }

    .nav-links li a {
      font-weight: 700;
      font-size: 0.9rem;
      padding: 8px 12px;
      color: var(--text-main);
      transition: color 0.2s;
    }

    .nav-links li a:hover {
      color: var(--accent-pink);
    }

    .mobile-menu-btn {
      display: none;
      background: var(--primary);
      border: 2px solid var(--border-dark);
      box-shadow: 2px 2px 0 var(--border-dark);
      padding: 6px 12px;
      font-weight: 900;
      cursor: pointer;
    }

    /* HERO SECTION (NO IMAGES HERE!) */
    .hero-section {
      padding: 80px 0 60px;
      background: linear-gradient(135deg, #fff9db 0%, #faf9f5 60%, #e6fcfe 100%);
      border-bottom: 2px solid var(--border-dark);
      position: relative;
    }

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

    .hero-tag {
      display: inline-block;
      background: var(--accent-pink);
      color: #fff;
      font-weight: 800;
      padding: 6px 16px;
      border-radius: 50px;
      border: 2px solid var(--border-dark);
      box-shadow: 3px 3px 0 var(--border-dark);
      font-size: 0.9rem;
      margin-bottom: 20px;
      transform: rotate(-1deg);
    }

    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
      color: var(--border-dark);
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 30px;
      line-height: 1.7;
      font-weight: 500;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }

    .hero-pills {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .hero-pill {
      background: #fff;
      border: 2px solid var(--border-dark);
      padding: 6px 14px;
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 700;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    /* STATS COUNTER BAR */
    .stats-section {
      padding: 40px 0;
      background: var(--card-bg);
      border-bottom: 2px solid var(--border-dark);
    }

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

    .stat-card {
      text-align: center;
      padding: 20px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-graffiti);
      background: var(--bg-color);
    }

    .stat-number {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--accent-purple);
      line-height: 1.1;
    }

    .stat-label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-top: 6px;
    }

    /* SECTION SPACING */
    .section-padding {
      padding: 70px 0;
      border-bottom: 2px solid var(--border-dark);
    }

    /* ABOUT & PLATFORM INTRO */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 1.8rem;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .about-text p {
      color: var(--text-muted);
      margin-bottom: 16px;
      font-size: 1rem;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-tag {
      background: var(--primary);
      border: 1.5px solid var(--border-dark);
      padding: 4px 10px;
      border-radius: 6px;
      font-size: 0.8rem;
      font-weight: 800;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    /* AIGC SERVICES & PRODUCTION SCENARIOS */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .service-badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 4px;
      font-size: 0.75rem;
      font-weight: 900;
      border: 1px solid var(--border-dark);
      margin-bottom: 12px;
    }

    .service-card h4 {
      font-size: 1.3rem;
      font-weight: 900;
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* WORKFLOW STEPS */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

    .step-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-graffiti);
      position: relative;
    }

    .step-num {
      width: 40px;
      height: 40px;
      background: var(--accent-pink);
      color: #fff;
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.2rem;
      margin-bottom: 16px;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    /* CASES CENTER */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .case-card {
      overflow: hidden;
    }

    .case-img-wrap {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      overflow: hidden;
      margin-bottom: 14px;
      background: #eee;
    }

    /* COMPARISON SECTION */
    .rating-box {
      background: var(--primary);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-graffiti);
      padding: 20px;
      text-align: center;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      flex-wrap: wrap;
    }

    .rating-score {
      font-size: 3rem;
      font-weight: 900;
      color: var(--border-dark);
      line-height: 1;
    }

    .stars {
      color: #e63946;
      font-size: 1.5rem;
    }

    .comparison-table-wrap {
      overflow-x: auto;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-graffiti);
      background: #fff;
    }

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

    table.compare-table th, table.compare-table td {
      padding: 16px 20px;
      border-bottom: 1.5px solid #e2e8f0;
      font-size: 0.95rem;
    }

    table.compare-table th {
      background: #f1f5f9;
      font-weight: 900;
      color: var(--border-dark);
    }

    table.compare-table tr:hover {
      background: #f8fafc;
    }

    .highlight-cell {
      background: #fef08a;
      font-weight: 800;
      color: var(--border-dark);
    }

    /* TOKEN COMPARISON */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .token-card {
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 20px;
      background: #fff;
      box-shadow: var(--shadow-graffiti);
    }

    .price-tag {
      font-size: 1.8rem;
      font-weight: 900;
      color: var(--accent-pink);
      margin: 10px 0;
    }

    /* FAQ ACCORDION */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-graffiti);
      overflow: hidden;
    }

    .faq-question {
      padding: 20px;
      font-weight: 800;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
      background: #fff;
    }

    .faq-answer {
      padding: 0 20px 20px;
      color: var(--text-muted);
      font-size: 0.95rem;
      display: none;
      border-top: 1.5px dashed #e2e8f0;
      padding-top: 16px;
    }

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

    .faq-icon {
      font-weight: 900;
      font-size: 1.2rem;
    }

    /* REVIEWS SECTION */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 24px;
    }

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

    .avatar-bg {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      border: 2px solid var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      background: var(--secondary);
    }

    /* CONTACT & FORM */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

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

    .form-group label {
      display: block;
      font-weight: 800;
      margin-bottom: 6px;
      font-size: 0.9rem;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 1rem;
      background: #fff;
      box-shadow: 2px 2px 0 var(--border-dark);
    }

    .form-control:focus {
      outline: none;
      background: #fffde7;
    }

    .qr-box {
      text-align: center;
      padding: 20px;
      border: 2px dashed var(--border-dark);
      border-radius: var(--radius-md);
      background: #fff;
      margin-top: 20px;
    }

    .qr-box img {
      max-width: 160px;
      margin: 10px auto;
      border: 2px solid var(--border-dark);
    }

    /* ARTICLES & NEWS */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
    }

    .news-item {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-graffiti);
    }

    .news-item h5 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 8px;
    }

    /* FOOTER */
    .site-footer {
      background: #1e293b;
      color: #f8fafc;
      padding: 60px 0 30px;
      border-top: 2px solid var(--border-dark);
    }

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

    .footer-brand p {
      color: #94a3b8;
      font-size: 0.9rem;
      margin-top: 12px;
    }

    .footer-col h5 {
      font-size: 1.1rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 16px;
    }

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

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links a {
      color: #cbd5e1;
      font-size: 0.9rem;
      transition: color 0.2s;
    }

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

    .friend-links-box {
      border-top: 1px solid #334155;
      padding-top: 20px;
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.85rem;
    }

    .friend-links-box a {
      color: #94a3b8;
    }
    .friend-links-box a:hover {
      color: #fff;
    }

    .footer-bottom {
      border-top: 1px solid #334155;
      padding-top: 24px;
      text-align: center;
      color: #64748b;
      font-size: 0.85rem;
    }

    /* FLOATING CUSTOMER SERVICE */
    .float-cs {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      background: var(--primary);
      border: 2px solid var(--border-dark);
      border-radius: 50%;
      box-shadow: 3px 3px 0 var(--border-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 900;
      font-size: 1.2rem;
      cursor: pointer;
      transition: transform 0.2s;
    }

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

    /* RESPONSIVE MEDIA QUERIES */
    @media (max-width: 992px) {
      .about-grid, .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .stats-grid {
        grid-template-columns: 1fr 1fr;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        width: 100%;
        background: #faf9f5;
        border-bottom: 2px solid var(--border-dark);
        flex-direction: column;
        padding: 20px;
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .stats-grid {
        grid-template-columns: 1fr;
      }
    }