/* ----------------------------------------------------
       RESET & BASE STYLES - LIGHT THEME WITH POP GRAFFITI
       ---------------------------------------------------- */
    :root {
      --bg-main: #fcfbfa;
      --bg-card: #ffffff;
      --bg-alt: #f3f4f6;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --text-dark: #0f172a;
      
      --accent-yellow: #ffe600;
      --accent-magenta: #ff2a85;
      --accent-cyan: #00e5ff;
      --accent-purple: #8b5cf6;
      --accent-green: #10b981;
      --accent-orange: #f97316;
      
      --border-dark: #1e293b;
      --shadow-pop: 4px 4px 0px #1e293b;
      --shadow-pop-lg: 6px 6px 0px #1e293b;
      --shadow-pop-sm: 2px 2px 0px #1e293b;
      
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --container-max: 1200px;
    }

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

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

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

    a {
      color: var(--text-dark);
      text-decoration: none;
      transition: all 0.2s ease;
    }

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

    section {
      padding: 70px 0;
      position: relative;
    }

    /* ----------------------------------------------------
       TYPOGRAPHY & UTILITIES
       ---------------------------------------------------- */
    .section-header {
      text-align: center;
      margin-bottom: 50px;
    }

    .badge-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--accent-yellow);
      color: var(--text-dark);
      font-weight: 800;
      font-size: 0.85rem;
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-pop-sm);
      border-radius: 50px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .badge-tag.pink { background-color: var(--accent-magenta); color: #fff; }
    .badge-tag.cyan { background-color: var(--accent-cyan); color: var(--text-dark); }
    .badge-tag.purple { background-color: var(--accent-purple); color: #fff; }
    .badge-tag.green { background-color: var(--accent-green); color: #fff; }

    .section-title {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--text-dark);
      line-height: 1.3;
      margin-bottom: 12px;
    }

    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 700px;
      margin: 0 auto;
    }

    /* Graffiti Pop Buttons */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 12px 28px;
      font-size: 1rem;
      font-weight: 800;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      cursor: pointer;
      box-shadow: var(--shadow-pop);
      transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.2s ease;
      text-align: center;
      gap: 8px;
    }

    .btn:hover {
      transform: translate(-2px, -2px);
      box-shadow: var(--shadow-pop-lg);
    }

    .btn:active {
      transform: translate(2px, 2px);
      box-shadow: var(--shadow-pop-sm);
    }

    .btn-primary {
      background-color: var(--accent-yellow);
      color: var(--text-dark);
    }

    .btn-secondary {
      background-color: var(--accent-cyan);
      color: var(--text-dark);
    }

    .btn-dark {
      background-color: var(--text-dark);
      color: #ffffff;
    }

    .btn-pink {
      background-color: var(--accent-magenta);
      color: #ffffff;
    }

    /* Card standard */
    .pop-card {
      background: var(--bg-card);
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-pop);
      padding: 24px;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

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

    /* ----------------------------------------------------
       HEADER & NAVIGATION
       ---------------------------------------------------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(253, 251, 250, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-dark);
      padding: 12px 0;
    }

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

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

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

    .brand-name {
      font-size: 1.4rem;
      font-weight: 900;
      color: var(--text-dark);
    }

    .nav-container {
      display: flex;
      align-items: center;
    }

    /* User Explicit Requirement: .nav-links gap set to 0 */
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      white-space: nowrap;
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      background-color: var(--accent-yellow);
      color: var(--text-dark);
      border: 1px solid var(--border-dark);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 2px solid var(--border-dark);
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      font-size: 1.2rem;
      cursor: pointer;
      box-shadow: var(--shadow-pop-sm);
    }

    /* ----------------------------------------------------
       HERO SECTION (STRICTLY NO IMAGES!)
       ---------------------------------------------------- */
    .hero-section {
      background-color: #fffdf5;
      padding: 80px 0 60px 0;
      border-bottom: 2px solid var(--border-dark);
      position: relative;
      overflow: hidden;
    }

    .hero-graffiti-bg {
      position: absolute;
      top: -30px;
      right: -30px;
      width: 250px;
      height: 250px;
      background: radial-gradient(circle, rgba(255,42,133,0.15) 0%, rgba(255,230,0,0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-inner {
      text-align: center;
      max-width: 950px;
      margin: 0 auto;
    }

    .hero-badge-wrap {
      display: flex;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 20px;
    }

    .hero-h1 {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--text-dark);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.2rem;
      color: var(--text-main);
      max-width: 800px;
      margin: 0 auto 30px auto;
      font-weight: 500;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .hero-models-strip {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-pop);
      border-radius: var(--radius-md);
      padding: 20px;
      margin-top: 20px;
    }

    .hero-models-title {
      font-weight: 800;
      font-size: 0.9rem;
      color: var(--text-muted);
      text-transform: uppercase;
      margin-bottom: 12px;
      letter-spacing: 1px;
    }

    .hero-model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }

    .model-pill {
      padding: 4px 10px;
      background: var(--bg-alt);
      border: 1px solid var(--border-dark);
      border-radius: 6px;
      font-size: 0.82rem;
      font-weight: 700;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 40px;
    }

    .stat-card {
      background: var(--accent-yellow);
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-pop);
      border-radius: var(--radius-md);
      padding: 16px;
      text-align: center;
    }

    .stat-card.c2 { background: var(--accent-cyan); }
    .stat-card.c3 { background: var(--accent-magenta); color: #fff; }
    .stat-card.c4 { background: var(--accent-purple); color: #fff; }

    .stat-num {
      font-size: 1.8rem;
      font-weight: 900;
      line-height: 1.1;
    }

    .stat-label {
      font-size: 0.85rem;
      font-weight: 700;
      margin-top: 4px;
    }

    /* ----------------------------------------------------
       ABOUT US SECTION (#about)
       ---------------------------------------------------- */
    .about-section {
      background-color: var(--bg-main);
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 1.6rem;
      margin-bottom: 15px;
      font-weight: 800;
    }

    .about-feature-list {
      list-style: none;
      margin-top: 20px;
    }

    .about-feature-list li {
      position: relative;
      padding-left: 28px;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .about-feature-list li::before {
      content: "★";
      position: absolute;
      left: 0;
      color: var(--accent-magenta);
      font-size: 1.1rem;
    }

    /* ----------------------------------------------------
       SERVICES SECTION (#services)
       ---------------------------------------------------- */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

    .service-card-title {
      font-size: 1.2rem;
      font-weight: 800;
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

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

    /* ----------------------------------------------------
       ONE-STOP CREATION (#creation)
       ---------------------------------------------------- */
    .creation-section {
      background-color: #f4f4f9;
      border-top: 2px solid var(--border-dark);
      border-bottom: 2px solid var(--border-dark);
    }

    .creation-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .creation-card {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-pop);
      padding: 24px;
    }

    .creation-card h4 {
      font-size: 1.25rem;
      font-weight: 800;
      margin: 10px 0;
    }

    /* ----------------------------------------------------
       SOLUTIONS (#solutions) & NETWORK (#network)
       ---------------------------------------------------- */
    .solutions-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .network-bar {
      background: var(--accent-cyan);
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-pop);
      border-radius: var(--radius-md);
      padding: 30px;
      text-align: center;
    }

    .network-nodes {
      display: flex;
      justify-content: space-around;
      flex-wrap: wrap;
      gap: 20px;
      margin-top: 20px;
    }

    .node-item {
      background: #fff;
      border: 2px solid var(--border-dark);
      padding: 10px 20px;
      border-radius: 50px;
      font-weight: 800;
      box-shadow: var(--shadow-pop-sm);
    }

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

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

    .step-num {
      width: 40px;
      height: 40px;
      background: var(--accent-yellow);
      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: 14px;
    }

    /* ----------------------------------------------------
       CASES GALLERY (#cases)
       ---------------------------------------------------- */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 24px;
    }

    .case-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-pop);
    }

    .case-img-wrap {
      width: 100%;
      border-bottom: 2px solid var(--border-dark);
      background: #e2e8f0;
    }

    .ai-page-image {
      width: 100%;
      height: auto;
      display: block;
      object-fit: cover;
    }

    .case-info {
      padding: 16px;
    }

    .case-info h4 {
      font-size: 1.1rem;
      font-weight: 800;
      margin-bottom: 6px;
    }

    /* ----------------------------------------------------
       COMPARISON SECTION (#comparison)
       ---------------------------------------------------- */
    .comparison-section {
      background-color: #fefce8;
      border-top: 2px solid var(--border-dark);
      border-bottom: 2px solid var(--border-dark);
    }

    .score-banner {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-pop-lg);
      border-radius: var(--radius-lg);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 35px;
    }

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

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

    .score-stars {
      color: #f59e0b;
      font-size: 1.8rem;
      letter-spacing: 2px;
    }

    .table-wrapper {
      overflow-x: auto;
    }

    .comparison-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #ffffff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-pop);
    }

    .comparison-table th, 
    .comparison-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-dark);
      border-right: 1px solid var(--border-dark);
      text-align: center;
      font-size: 0.95rem;
    }

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

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

    .comparison-table th {
      background: var(--bg-alt);
      font-weight: 800;
    }

    .comparison-table td.highlight {
      background: #fef08a;
      font-weight: 800;
    }

    /* ----------------------------------------------------
       SMART MATCHING & FORM (#matching)
       ---------------------------------------------------- */
    .form-box {
      background: #ffffff;
      border: 2px solid var(--border-dark);
      box-shadow: var(--shadow-pop-lg);
      border-radius: var(--radius-lg);
      padding: 35px;
      max-width: 800px;
      margin: 0 auto;
    }

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

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

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

    .form-group label {
      font-weight: 800;
      font-size: 0.92rem;
    }

    .form-control {
      padding: 12px 16px;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      font-size: 1rem;
      outline: none;
      background: #fff;
    }

    .form-control:focus {
      border-color: var(--accent-magenta);
      box-shadow: var(--shadow-pop-sm);
    }

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

    .price-card {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-pop);
      padding: 24px;
      text-align: center;
    }

    .price-card.featured {
      background: #fef08a;
    }

    .price-val {
      font-size: 2rem;
      font-weight: 900;
      margin: 12px 0;
    }

    /* ----------------------------------------------------
       REVIEWS & HELP CENTER (#help)
       ---------------------------------------------------- */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 20px;
    }

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

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

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

    .review-role {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* ----------------------------------------------------
       FAQ ACCORDION (#faq)
       ---------------------------------------------------- */
    .faq-container {
      max-width: 850px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      font-weight: 800;
      font-size: 1.05rem;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      background: #ffffff;
    }

    .faq-icon {
      font-weight: 900;
      font-size: 1.2rem;
      transition: transform 0.2s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
      background: var(--bg-main);
      border-top: 0px solid var(--border-dark);
      padding: 0 24px;
      color: var(--text-main);
      font-size: 0.95rem;
    }

    .faq-item.active .faq-answer {
      max-height: 500px;
      padding: 16px 24px;
      border-top: 2px solid var(--border-dark);
    }

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

    /* ----------------------------------------------------
       WIKI & ARTICLES (#wiki / #articles)
       ---------------------------------------------------- */
    .wiki-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-bottom: 30px;
    }

    .articles-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

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

    .article-card a {
      font-weight: 800;
      color: var(--text-dark);
      display: inline-block;
      margin-top: 10px;
    }

    .article-card a:hover {
      color: var(--accent-magenta);
    }

    /* ----------------------------------------------------
       PARTNER & CONTACT (#partner / #contact)
       ---------------------------------------------------- */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .qr-box {
      background: #fff;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-pop);
      padding: 24px;
      text-align: center;
    }

    .qr-box img {
      max-width: 180px;
      height: auto;
      border: 2px solid var(--border-dark);
      border-radius: var(--radius-sm);
      margin-top: 12px;
    }

    /* ----------------------------------------------------
       FOOTER & FRIENDSHIP LINKS
       ---------------------------------------------------- */
    .site-footer {
      background-color: #0f172a;
      color: #f8fafc;
      border-top: 3px solid var(--border-dark);
      padding: 50px 0 25px 0;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h5 {
      font-size: 1.1rem;
      font-weight: 800;
      color: #ffffff;
      margin-bottom: 16px;
    }

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

    .footer-links a {
      color: #94a3b8;
      font-size: 0.9rem;
    }

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

    .friendship-links {
      border-top: 1px solid #334155;
      padding-top: 20px;
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 15px;
      font-size: 0.88rem;
    }

    .friendship-links a {
      color: #cbd5e1;
    }

    .friendship-links a:hover {
      color: var(--accent-cyan);
    }

    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: #64748b;
    }

    .ai-page-home-link {
      color: var(--accent-yellow);
      font-weight: 800;
    }

    /* Floating Widget */
    .floating-widget {
      position: fixed;
      bottom: 25px;
      right: 25px;
      z-index: 999;
    }

    /* ----------------------------------------------------
       RESPONSIVE BREAKPOINTS
       ---------------------------------------------------- */
    @media (max-width: 992px) {
      .hero-stats-grid { grid-template-columns: repeat(2, 1fr); }
      .creation-grid { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: repeat(2, 1fr); }
      .about-grid, .contact-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      
      .mobile-menu-btn { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 2px solid var(--border-dark);
        flex-direction: column;
        padding: 15px 0;
        box-shadow: 0 10px 15px rgba(0,0,0,0.1);
        gap: 0;
      }
      .nav-links.show { display: flex; }
      .nav-links li { width: 100%; text-align: center; }
      .nav-links li a { display: block; padding: 10px; }
    }

    @media (max-width: 600px) {
      .hero-h1 { font-size: 1.8rem; }
      .section-title { font-size: 1.6rem; }
      .hero-stats-grid { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: 1fr; }
      .form-grid { grid-template-columns: 1fr; }
      .form-group.full { grid-column: span 1; }
      .footer-grid { grid-template-columns: 1fr; }
    }