/* CSS Reset & Variable Variables (多彩涂鸦风 - Neo-Brutalism Style) */
        :root {
            --bg-main: #FAF9F5;
            --border-color: #1A1A1A;
            --color-yellow: #FFE600;
            --color-pink: #FF66B2;
            --color-blue: #3399FF;
            --color-green: #33CC66;
            --color-purple: #B266FF;
            --text-dark: #1A1A1A;
            --text-muted: #555555;
            --container-width: 1200px;
        }

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

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

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

        /* Brutalist Styles Elements */
        .brutal-border {
            border: 3px solid var(--border-color);
            box-shadow: 5px 5px 0px var(--border-color);
        }

        .brutal-card {
            background: #FFFFFF;
            border: 3px solid var(--border-color);
            box-shadow: 6px 6px 0px var(--border-color);
            border-radius: 12px;
            padding: 24px;
            transition: all 0.2s ease;
        }

        .brutal-card:hover {
            transform: translate(-3px, -3px);
            box-shadow: 9px 9px 0px var(--border-color);
        }

        .brutal-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-weight: 800;
            font-size: 1rem;
            color: var(--text-dark);
            text-decoration: none;
            border: 3px solid var(--border-color);
            box-shadow: 4px 4px 0px var(--border-color);
            border-radius: 8px;
            cursor: pointer;
            transition: all 0.15s ease;
        }

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

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

        .btn-yellow { background-color: var(--color-yellow); }
        .btn-pink { background-color: var(--color-pink); }
        .btn-blue { background-color: var(--color-blue); color: #FFF; }
        .btn-blue:hover { color: #FFF; }

        .badge {
            display: inline-block;
            padding: 4px 10px;
            font-size: 0.85rem;
            font-weight: bold;
            border: 2px solid var(--border-color);
            border-radius: 20px;
            margin-bottom: 10px;
        }

        /* Section structure */
        section {
            padding: 80px 0;
            position: relative;
        }

        section:nth-child(even) {
            background-color: #FFF;
        }

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

        .section-title {
            display: inline-block;
            font-size: 2.2rem;
            font-weight: 900;
            text-transform: uppercase;
            padding: 10px 20px;
            background: var(--color-yellow);
            border: 3px solid var(--border-color);
            box-shadow: 5px 5px 0px var(--border-color);
            transform: rotate(-1deg);
            margin-bottom: 15px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Navigation Header */
        header {
            background: #FFF;
            border-bottom: 4px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 15px 0;
        }

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

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

        .logo-wrap img {
            max-height: 45px;
        }

        .nav-links {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-dark);
            font-weight: 700;
            font-size: 0.95rem;
            padding: 6px 12px;
            border-radius: 4px;
            transition: all 0.2s;
        }

        .nav-links a:hover {
            background: var(--color-yellow);
            border: 2px solid var(--border-color);
        }

        .nav-btn-wrap {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            border: 3px solid var(--border-color);
            padding: 8px;
            background: #FFF;
            cursor: pointer;
        }

        .menu-toggle span {
            width: 24px;
            height: 3px;
            background: var(--text-dark);
        }

        /* 1. Hero Section (No Images Allowed) */
        #hero {
            background: linear-gradient(135deg, #FFE600 0%, #FFB800 100%);
            border-bottom: 4px solid var(--border-color);
            padding: 120px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            background: #FFF;
            padding: 8px 16px;
            font-weight: 800;
            border: 3px solid var(--border-color);
            display: inline-block;
            margin-bottom: 25px;
            transform: rotate(2deg);
        }

        .hero-title {
            font-size: 3.5rem;
            font-weight: 900;
            line-height: 1.2;
            color: var(--text-dark);
            margin-bottom: 25px;
            text-shadow: 2px 2px 0px #FFF;
        }

        .hero-desc {
            font-size: 1.3rem;
            max-width: 800px;
            margin: 0 auto 40px;
            color: var(--text-dark);
            font-weight: 500;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }

        /* Doodle Elements (Pure CSS shapes for Graffiti style) */
        .doodle-shape {
            position: absolute;
            border: 3px solid var(--border-color);
            opacity: 0.15;
            z-index: 1;
            pointer-events: none;
        }

        .doodle-1 {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--color-pink);
            top: 15%;
            left: 10%;
            transform: rotate(15deg);
        }

        .doodle-2 {
            width: 100px;
            height: 100px;
            background: var(--color-blue);
            bottom: 10%;
            right: 8%;
            transform: rotate(-25deg);
        }

        /* 2. About Section */
        #about .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-content h3 {
            font-size: 2rem;
            margin-bottom: 20px;
            font-weight: 800;
        }

        .about-content p {
            margin-bottom: 15px;
            color: var(--text-muted);
            font-size: 1.05rem;
        }

        .about-visual {
            position: relative;
            display: flex;
            justify-content: center;
        }

        .about-img-frame {
            border: 4px solid var(--border-color);
            box-shadow: 10px 10px 0px var(--border-color);
            background: #FFF;
            padding: 15px;
            transform: rotate(-1deg);
        }

        .about-img-frame img {
            width: 100%;
            display: block;
            border: 2px solid var(--border-color);
        }

        /* Data counters */
        .data-counters {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .counter-card {
            text-align: center;
            background: #FFF;
            border: 3px solid var(--border-color);
            box-shadow: 4px 4px 0px var(--border-color);
            padding: 20px;
            border-radius: 8px;
        }

        .counter-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--color-pink);
        }

        /* 3. Services / Models */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .model-list-tags {
            margin-top: 40px;
            padding: 25px;
            background: var(--bg-main);
            border: 3px solid var(--border-color);
            border-radius: 12px;
        }

        .model-tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 15px;
        }

        .model-tag {
            background: #FFF;
            border: 2px solid var(--border-color);
            padding: 6px 12px;
            font-size: 0.85rem;
            font-weight: bold;
            border-radius: 6px;
            box-shadow: 2px 2px 0px var(--border-color);
        }

        /* 4. One-stop AIGC */
        .onestop-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        /* 5. Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .solutions-card {
            background: #FFF;
            border: 3px solid var(--border-color);
            border-radius: 12px;
            padding: 24px;
        }

        /* 6. Service Network */
        .network-wrap {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 40px;
            align-items: center;
        }

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

        .network-list li {
            padding: 15px;
            border: 2px solid var(--border-color);
            margin-bottom: 12px;
            font-weight: bold;
            box-shadow: 3px 3px 0px var(--border-color);
            background: #FFF;
        }

        /* 7. Steps & 8. Tech Standards */
        .steps-flow {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .step-item {
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 50px;
            height: 50px;
            background: var(--color-pink);
            border: 3px solid var(--border-color);
            box-shadow: 3px 3px 0px var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            font-weight: 900;
            border-radius: 50%;
            margin: 0 auto 15px;
        }

        /* 9. Case Center */
        .case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .case-item img {
            width: 100%;
            border: 3px solid var(--border-color);
            box-shadow: 6px 6px 0px var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
        }

        /* 10. Evaluation */
        .eval-table-wrap {
            overflow-x: auto;
            border: 3px solid var(--border-color);
            box-shadow: 6px 6px 0px var(--border-color);
            border-radius: 12px;
            background: #FFF;
        }

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

        th, td {
            padding: 18px;
            border-bottom: 2px solid var(--border-color);
            border-right: 2px solid var(--border-color);
        }

        th {
            background-color: var(--color-yellow);
            font-weight: 900;
            color: var(--text-dark);
        }

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

        /* 12. Token Price */
        .token-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        /* 13 & 14. Training */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
        }

        /* 21. Agent */
        .agent-banner {
            background: linear-gradient(135deg, var(--color-pink) 0%, #FF3399 100%);
            border: 3px solid var(--border-color);
            box-shadow: 8px 8px 0px var(--border-color);
            border-radius: 16px;
            padding: 50px;
            color: #FFF;
            text-align: center;
        }

        .agent-banner h3 {
            font-size: 2.2rem;
            font-weight: 900;
            margin-bottom: 20px;
        }

        .agent-banner p {
            font-size: 1.15rem;
            max-width: 800px;
            margin: 0 auto 30px;
        }

        /* 11 & 20. Form & Contact */
        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .brutal-form {
            background: #FFF;
            padding: 40px;
        }

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

        .form-group label {
            display: block;
            font-weight: bold;
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 3px solid var(--border-color);
            border-radius: 8px;
            font-family: inherit;
            font-size: 1rem;
            outline: none;
        }

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

        /* 15, 17, 18. Help & FAQ & Glossary */
        .help-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 15px;
            margin-top: 40px;
        }

        .faq-item {
            background: #FFF;
            border: 3px solid var(--border-color);
            box-shadow: 4px 4px 0px var(--border-color);
            border-radius: 8px;
            overflow: hidden;
        }

        .faq-question {
            padding: 18px 25px;
            font-weight: 800;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: #FFF;
            user-select: none;
        }

        .faq-answer {
            padding: 0 25px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s ease;
            border-top: 0px solid var(--border-color);
            color: var(--text-muted);
        }

        .faq-item.active .faq-answer {
            padding: 18px 25px;
            max-height: 200px;
            border-top: 2px solid var(--border-color);
        }

        /* 19. Articles & Links */
        .articles-wrap {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }

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

        .article-list li {
            padding: 15px 0;
            border-bottom: 2px dashed var(--border-color);
        }

        .article-list li a {
            color: var(--text-dark);
            text-decoration: none;
            font-weight: bold;
            font-size: 1.1rem;
            display: block;
            transition: color 0.2s;
        }

        .article-list li a:hover {
            color: var(--color-pink);
        }

        .comments-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 25px;
            margin-top: 50px;
        }

        .comment-card {
            background: #FFF;
            border: 3px solid var(--border-color);
            box-shadow: 4px 4px 0px var(--border-color);
            border-radius: 8px;
            padding: 20px;
        }

        .comment-user {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 15px;
            font-weight: bold;
        }

        .comment-avatar {
            width: 35px;
            height: 35px;
            background: var(--color-blue);
            border-radius: 50%;
            border: 2px solid var(--border-color);
        }

        /* Footer */
        footer {
            background: #FFF;
            border-top: 4px solid var(--border-color);
            padding: 50px 0 20px;
        }

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

        .friend-links {
            margin-top: 20px;
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links a {
            color: var(--text-dark);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: bold;
            background: var(--bg-main);
            padding: 5px 10px;
            border: 2px solid var(--border-color);
            border-radius: 4px;
        }

        .copyright {
            text-align: center;
            border-top: 2px solid var(--border-color);
            padding-top: 20px;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Floating Widget */
        .floating-widget {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .widget-item {
            width: 55px;
            height: 55px;
            background: #FFF;
            border: 3px solid var(--border-color);
            box-shadow: 3px 3px 0px var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            position: relative;
        }

        .widget-item:hover {
            transform: translate(-2px, -2px);
            box-shadow: 5px 5px 0px var(--border-color);
        }

        .qrcode-pop {
            display: none;
            position: absolute;
            bottom: 65px;
            right: 0;
            background: #FFF;
            border: 3px solid var(--border-color);
            box-shadow: 4px 4px 0px var(--border-color);
            padding: 15px;
            border-radius: 8px;
            text-align: center;
            width: 160px;
        }

        .qrcode-pop img {
            width: 100%;
            border: 1px solid #CCC;
        }

        .widget-item:hover .qrcode-pop {
            display: block;
        }

        /* Responsive */
        @media (max-width: 992px) {
            .nav-links { display: none; }
            .menu-toggle { display: flex; }
            #about .about-grid, .network-wrap, .case-grid, .contact-grid, .articles-wrap {
                grid-template-columns: 1fr;
            }
            .hero-title { font-size: 2.5rem; }
            .data-counters { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 576px) {
            .hero-title { font-size: 1.8rem; }
            .data-counters { grid-template-columns: 1fr; }
        }