:root {
            --bg-color: #FAF6EE;
            --text-color: #1A1A1A;
            --primary: #FFDE4D;
            --secondary: #FF6B6B;
            --accent: #4D96FF;
            --success: #6BCB77;
            --border-width: 3px;
            --shadow-style: 4px 4px 0px #1A1A1A;
            --shadow-hover: 8px 8px 0px #1A1A1A;
        }

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

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

        /* Container */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Common Style: Doodle Brutalism Card */
        .doodle-card {
            background: #FFFFFF;
            border: var(--border-width) solid var(--text-color);
            box-shadow: var(--shadow-style);
            border-radius: 16px;
            padding: 24px;
            transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }

        .doodle-card:hover {
            transform: translate(-4px, -4px);
            box-shadow: var(--shadow-hover);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 16px;
            font-weight: 800;
            text-decoration: none;
            color: var(--text-color);
            border: var(--border-width) solid var(--text-color);
            border-radius: 12px;
            box-shadow: 4px 4px 0px #1A1A1A;
            cursor: pointer;
            transition: all 0.2s ease;
            background: var(--primary);
        }

        .btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0px #1A1A1A;
        }

        .btn-secondary {
            background: var(--accent);
            color: white;
        }

        .btn-alert {
            background: var(--secondary);
            color: white;
        }

        /* Badge */
        .badge {
            display: inline-block;
            padding: 6px 12px;
            font-size: 14px;
            font-weight: 700;
            border: 2px solid var(--text-color);
            border-radius: 30px;
            background: var(--success);
            color: var(--text-color);
            margin-bottom: 12px;
        }

        /* Header Navigation */
        header {
            background: #FFFFFF;
            border-bottom: var(--border-width) solid var(--text-color);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 12px 0;
        }

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .ai-page-logo {
            height: 48px;
            display: block;
        }

        .logo-text {
            font-size: 22px;
            font-weight: 900;
            letter-spacing: -0.5px;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
            align-items: center;
        }

        .nav-link {
            text-decoration: none;
            color: var(--text-color);
            font-weight: 700;
            font-size: 15px;
            padding: 8px 12px;
            border-radius: 8px;
            transition: background 0.2s;
        }

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

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

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

        /* Hero Section (No Image) */
        .hero {
            padding: 80px 0;
            background: radial-gradient(circle at 10% 20%, rgba(255, 222, 77, 0.2) 0%, rgba(255, 107, 107, 0.1) 90%);
            border-bottom: var(--border-width) solid var(--text-color);
            text-align: center;
            position: relative;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 10px;
            left: 10px;
            right: 10px;
            bottom: 10px;
            border: 2px dashed rgba(26, 26, 26, 0.15);
            pointer-events: none;
            border-radius: 24px;
        }

        .hero-h1 {
            font-size: clamp(32px, 5vw, 56px);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 24px;
            color: var(--text-color);
        }

        .hero-h1 span {
            background: var(--primary);
            padding: 2px 10px;
            border: var(--border-width) solid var(--text-color);
            display: inline-block;
            transform: rotate(-1deg);
            box-shadow: 3px 3px 0px #1A1A1A;
        }

        .hero-desc {
            font-size: 18px;
            max-width: 800px;
            margin: 0 auto 36px;
            color: #4A4A4A;
            font-weight: 500;
        }

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

        /* Section Global */
        section {
            padding: 80px 0;
            border-bottom: var(--border-width) solid var(--text-color);
        }

        .section-title {
            text-align: center;
            font-size: 32px;
            font-weight: 900;
            margin-bottom: 48px;
            position: relative;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
        }

        .section-title::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 12px;
            background: var(--primary);
            z-index: -1;
            transform: skewX(-15deg);
        }

        /* Highlights (Metrics) */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
        }

        .metric-card {
            text-align: center;
            background: #FFFFFF;
        }

        .metric-num {
            font-size: 40px;
            font-weight: 900;
            color: var(--secondary);
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-color);
        }

        /* AIGC Services Grid */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }

        .service-card .icon {
            font-size: 48px;
            margin-bottom: 16px;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 800;
            margin-bottom: 12px;
        }

        /* Step workflow */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            position: relative;
        }

        .step-item {
            background: #FFFFFF;
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -15px;
            left: -15px;
            background: var(--accent);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            border: 2px solid var(--text-color);
        }

        /* Solution Showcase */
        .solution-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 32px;
        }

        /* Compare Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border: var(--border-width) solid var(--text-color);
            border-radius: 16px;
            box-shadow: var(--shadow-style);
            background: white;
        }

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

        th, td {
            padding: 16px 20px;
            border-bottom: 2px solid var(--text-color);
        }

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

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

        .highlight-row {
            background: rgba(255, 222, 77, 0.1);
        }

        /* Evaluation Section */
        .eval-box {
            background: #FFF;
            border: var(--border-width) solid var(--text-color);
            box-shadow: var(--shadow-style);
            border-radius: 16px;
            padding: 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 24px;
        }

        .eval-score {
            font-size: 64px;
            font-weight: 900;
            color: var(--secondary);
            display: flex;
            align-items: baseline;
        }

        .eval-score span {
            font-size: 24px;
            color: var(--text-color);
        }

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

        /* Platform list tag cloud */
        .platform-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            padding: 24px;
            background: white;
            border: 2px dashed var(--text-color);
            border-radius: 16px;
        }

        .platform-tag {
            padding: 8px 16px;
            background: var(--bg-color);
            border: 2px solid var(--text-color);
            border-radius: 8px;
            font-weight: 700;
            font-size: 14px;
            box-shadow: 2px 2px 0px #1A1A1A;
            transition: all 0.2s;
        }

        .platform-tag:hover {
            background: var(--accent);
            color: white;
            transform: translateY(-2px);
        }

        /* FAQ accordion */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            border: var(--border-width) solid var(--text-color);
            border-radius: 12px;
            background: #FFFFFF;
            overflow: hidden;
            box-shadow: 3px 3px 0px #1A1A1A;
        }

        .faq-header {
            padding: 20px;
            background: #FFF;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 800;
            font-size: 18px;
            user-select: none;
            transition: background 0.2s;
        }

        .faq-header:hover {
            background: var(--primary);
        }

        .faq-body {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease-out;
            border-top: 0px solid var(--text-color);
            background: #FAFAFA;
            color: #555;
        }

        .faq-item.active .faq-body {
            padding: 20px;
            max-height: 500px;
            border-top: 2px solid var(--text-color);
        }

        .faq-icon::after {
            content: '+';
            font-size: 24px;
            font-weight: 700;
        }

        .faq-item.active .faq-icon::after {
            content: '−';
        }

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

        .comment-card {
            background: white;
        }

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

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

        .comment-meta h4 {
            font-weight: 800;
        }

        .comment-meta span {
            font-size: 12px;
            color: #777;
        }

        /* Cases & Images styling */
        .image-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .gallery-card {
            overflow: hidden;
            background: white;
            padding: 12px;
        }

        .gallery-card img {
            width: 100%;
            border-radius: 8px;
            border: 2px solid var(--text-color);
            display: block;
            margin-bottom: 12px;
        }

        /* Form styling */
        .form-section {
            background: var(--primary);
        }

        .form-box {
            max-width: 700px;
            margin: 0 auto;
            background: white;
        }

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

        @media (max-width: 768px) {
            .form-grid {
                grid-template-columns: 1fr;
            }
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

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

        @media (max-width: 768px) {
            .form-group.full-width {
                grid-column: span 1;
            }
        }

        label {
            font-weight: 800;
            font-size: 15px;
        }

        input, select, textarea {
            padding: 12px;
            border: 2px solid var(--text-color);
            border-radius: 8px;
            font-family: inherit;
            font-size: 15px;
            background: #FCFCFC;
        }

        input:focus, select:focus, textarea:focus {
            outline: none;
            border-color: var(--accent);
            background: #FFF;
        }

        /* Footer */
        footer {
            background: #1A1A1A;
            color: #FFFFFF;
            padding: 60px 0 20px;
            border-top: var(--border-width) solid var(--text-color);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h3 {
            font-size: 18px;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--primary);
            border-left: 4px solid var(--primary);
            padding-left: 8px;
        }

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

        .footer-links li {
            margin-bottom: 10px;
        }

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

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

        .footer-qrcode {
            max-width: 120px;
            border: 3px solid #FFF;
            border-radius: 8px;
            margin-top: 10px;
        }

        .footer-bottom {
            border-top: 1px solid #333;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: #888;
        }

        .footer-bottom a {
            color: #888;
            text-decoration: none;
            margin-right: 12px;
        }

        .footer-bottom a:hover {
            color: white;
        }

        /* Float Contact */
        .float-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 99;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--primary);
            border: 2px solid var(--text-color);
            box-shadow: 3px 3px 0px #1A1A1A;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            font-weight: 900;
            text-decoration: none;
            color: var(--text-color);
            transition: all 0.2s;
        }

        .float-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 5px 5px 0px #1A1A1A;
        }

        .float-qr-box {
            position: absolute;
            bottom: 70px;
            right: 0;
            background: white;
            border: var(--border-width) solid var(--text-color);
            border-radius: 12px;
            padding: 12px;
            box-shadow: var(--shadow-style);
            display: none;
            text-align: center;
            width: 160px;
        }

        .float-qr-box img {
            width: 100%;
            height: auto;
            border-radius: 6px;
        }

        .float-qr-container:hover .float-qr-box {
            display: block;
        }

        /* Mobile Menu */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: white;
                border-bottom: var(--border-width) solid var(--text-color);
                padding: 20px;
                gap: 12px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            }

            .nav-menu.active {
                display: flex;
            }

            .nav-toggle {
                display: flex;
            }
        }