/* CSS Reset & Variables */
        :root {
            --primary: #7c3aed; /* 艳色：电光紫 */
            --secondary: #00f0ff; /* 艳色：极光青 */
            --accent: #f43f5e; /* 艳色：珊瑚红 */
            --warning: #facc15; /* 荧光黄 */
            --dark: #0f172a;
            --light: #f8fafc;
            --white: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #cbd5e1;
            --neon-shadow: 4px 4px 0px 0px var(--dark);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--light);
            color: var(--text-main);
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

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

        /* Navigation */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.95);
            border-bottom: 3px solid var(--dark);
            backdrop-filter: blur(10px);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 70px;
        }

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

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

        .brand-name {
            font-size: 1.25rem;
            font-weight: 900;
            color: var(--dark);
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        nav {
            display: flex;
            gap: 20px;
        }

        nav a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 700;
            font-size: 0.9rem;
            transition: color 0.2s;
            padding: 5px 10px;
            border: 2px solid transparent;
        }

        nav a:hover {
            color: var(--primary);
            border-bottom: 2px solid var(--primary);
        }

        .nav-btn {
            background-color: var(--primary);
            color: var(--white);
            border: 2px solid var(--dark);
            padding: 8px 16px;
            font-weight: 700;
            text-decoration: none;
            box-shadow: 2px 2px 0px var(--dark);
            transition: transform 0.1s, box-shadow 0.1s;
        }

        .nav-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 4px 4px 0px var(--dark);
        }

        /* Burger Menu for Mobile */
        .menu-toggle {
            display: none;
            flex-direction: column;
            gap: 6px;
            cursor: pointer;
            border: none;
            background: none;
        }

        .menu-toggle span {
            display: block;
            width: 28px;
            height: 3px;
            background-color: var(--dark);
            transition: 0.3s;
        }

        /* Hero Section (No Image Allowed) */
        .hero {
            background: linear-gradient(135deg, #fef08a 0%, #e0f2fe 100%);
            border-bottom: 3px solid var(--dark);
            padding: 80px 0 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            background-color: var(--accent);
            color: var(--white);
            font-weight: 800;
            padding: 6px 12px;
            border: 2px solid var(--dark);
            display: inline-block;
            margin-bottom: 24px;
            transform: rotate(-1.5deg);
            box-shadow: 2px 2px 0 var(--dark);
        }

        .hero h1 {
            font-size: 3rem;
            font-weight: 900;
            color: var(--dark);
            line-height: 1.2;
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero h1 span {
            background: linear-gradient(90deg, var(--primary), var(--accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            display: inline-block;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-main);
            max-width: 800px;
            margin: 0 auto 40px auto;
            font-weight: 500;
        }

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

        .btn-primary {
            background-color: var(--primary);
            color: var(--white);
            font-size: 1.1rem;
            font-weight: 800;
            padding: 16px 32px;
            border: 3px solid var(--dark);
            text-decoration: none;
            box-shadow: 4px 4px 0px var(--dark);
            transition: all 0.15s ease;
        }

        .btn-primary:hover {
            transform: translate(-3px, -3px);
            box-shadow: 7px 7px 0px var(--dark);
            background-color: #6d28d9;
        }

        .btn-secondary {
            background-color: var(--white);
            color: var(--dark);
            font-size: 1.1rem;
            font-weight: 800;
            padding: 16px 32px;
            border: 3px solid var(--dark);
            text-decoration: none;
            box-shadow: 4px 4px 0px var(--dark);
            transition: all 0.15s ease;
        }

        .btn-secondary:hover {
            transform: translate(-3px, -3px);
            box-shadow: 7px 7px 0px var(--dark);
            background-color: var(--light);
        }

        /* Section Global Styles */
        section {
            padding: 80px 0;
            border-bottom: 3px solid var(--dark);
            background-color: var(--white);
        }

        .section-alt {
            background-color: #f1f5f9;
        }

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

        .section-tag {
            color: var(--primary);
            font-weight: 800;
            text-transform: uppercase;
            letter-spacing: 2px;
            font-size: 0.85rem;
            margin-bottom: 10px;
            display: block;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 900;
            color: var(--dark);
        }

        /* Grid System */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
            gap: 40px;
            align-items: center;
        }

        /* Cards & Styling (Neo-brutalism highlights) */
        .card {
            background-color: var(--white);
            border: 3px solid var(--dark);
            padding: 30px;
            box-shadow: var(--neon-shadow);
            transition: all 0.2s ease;
        }

        .card:hover {
            transform: translate(-4px, -4px);
            box-shadow: 8px 8px 0px var(--dark);
        }

        .card-icon {
            width: 50px;
            height: 50px;
            background-color: var(--secondary);
            border: 2px solid var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 900;
            font-size: 1.5rem;
            margin-bottom: 20px;
            box-shadow: 2px 2px 0 var(--dark);
        }

        .card-title {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 12px;
        }

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

        /* Data Indicators Component */
        .stats-section {
            background-color: var(--dark);
            color: var(--white);
            padding: 40px 0;
            border-bottom: 3px solid var(--dark);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            text-align: center;
        }

        .stat-item h3 {
            font-size: 2.5rem;
            font-weight: 900;
            color: var(--secondary);
        }

        .stat-item p {
            font-size: 0.95rem;
            color: #94a3b8;
            font-weight: 600;
        }

        /* Logo Cloud (AIGC models) */
        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 30px;
        }

        .model-tag {
            background-color: var(--white);
            border: 2px solid var(--dark);
            padding: 6px 14px;
            font-weight: 700;
            font-size: 0.85rem;
            box-shadow: 2px 2px 0 var(--dark);
            transition: all 0.15s;
        }

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

        /* Flow Steps Component */
        .steps-container {
            position: relative;
        }

        .step-item {
            display: flex;
            gap: 30px;
            margin-bottom: 40px;
            position: relative;
        }

        .step-num {
            flex-shrink: 0;
            width: 60px;
            height: 60px;
            background-color: var(--accent);
            color: var(--white);
            font-size: 1.8rem;
            font-weight: 900;
            border: 3px solid var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 3px 3px 0 var(--dark);
        }

        .step-content {
            background: var(--white);
            border: 3px solid var(--dark);
            padding: 24px;
            box-shadow: var(--neon-shadow);
            width: 100%;
        }

        /* Comparison Table Component */
        .table-responsive {
            overflow-x: auto;
            border: 3px solid var(--dark);
            box-shadow: var(--neon-shadow);
            background-color: var(--white);
        }

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

        th, td {
            padding: 16px 20px;
            border: 1px solid var(--border-color);
        }

        th {
            background-color: var(--dark);
            color: var(--white);
            font-weight: 800;
        }

        tr:nth-child(even) {
            background-color: #f8fafc;
        }

        .score-highlight {
            background-color: #fef08a !important;
            font-weight: 900;
            color: var(--dark);
        }

        .badge-star {
            color: #eab308;
            font-weight: 900;
        }

        /* Token Pricing Component */
        .token-pricing-box {
            background: linear-gradient(135deg, #fef9c3 0%, #ffedd5 100%);
            border: 3px solid var(--dark);
            padding: 30px;
            box-shadow: var(--neon-shadow);
        }

        /* Image Display Areas */
        .image-gallery {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
            margin-top: 30px;
        }

        .gallery-item {
            border: 3px solid var(--dark);
            overflow: hidden;
            box-shadow: var(--neon-shadow);
            background: var(--white);
        }

        .gallery-item img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            transition: transform 0.3s;
        }

        .gallery-item:hover img {
            transform: scale(1.05);
        }

        .gallery-title {
            padding: 12px;
            border-top: 3px solid var(--dark);
            font-weight: 800;
            background: var(--white);
            color: var(--dark);
            font-size: 0.95rem;
        }

        /* FAQ Accordion Component */
        .faq-accordion {
            max-width: 850px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            border: 3px solid var(--dark);
            background-color: var(--white);
            box-shadow: 4px 4px 0px var(--dark);
        }

        .faq-header {
            padding: 20px;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--dark);
            user-select: none;
            background: var(--white);
        }

        .faq-header::after {
            content: '+';
            font-size: 1.5rem;
            transition: transform 0.2s;
        }

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

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            background-color: #f8fafc;
            border-top: 0px solid var(--dark);
        }

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

        .faq-content {
            padding: 20px;
            font-size: 0.95rem;
            color: var(--text-main);
            line-height: 1.7;
        }

        /* User Reviews Section */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 25px;
        }

        .review-card {
            background-color: var(--white);
            border: 3px solid var(--dark);
            padding: 24px;
            box-shadow: var(--neon-shadow);
        }

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

        .review-avatar {
            width: 45px;
            height: 45px;
            background-color: var(--primary);
            color: var(--white);
            font-weight: 900;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid var(--dark);
        }

        .author-info h4 {
            font-size: 1rem;
            font-weight: 800;
            color: var(--dark);
        }

        .author-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

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

        /* Form Styling (Smart Request Matching) */
        .form-box {
            background-color: var(--white);
            border: 3px solid var(--dark);
            padding: 40px;
            box-shadow: 8px 8px 0px var(--dark);
            max-width: 650px;
            margin: 0 auto;
        }

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

        .form-label {
            display: block;
            font-weight: 800;
            margin-bottom: 8px;
            color: var(--dark);
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 3px solid var(--dark);
            background-color: #f8fafc;
            font-size: 1rem;
            font-weight: 600;
            color: var(--dark);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: var(--white);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        .submit-btn {
            background-color: var(--accent);
            color: var(--white);
            font-size: 1.1rem;
            font-weight: 800;
            padding: 14px 28px;
            border: 3px solid var(--dark);
            width: 100%;
            cursor: pointer;
            box-shadow: 4px 4px 0px var(--dark);
            transition: all 0.1s;
        }

        .submit-btn:hover {
            transform: translate(-2px, -2px);
            box-shadow: 6px 6px 0px var(--dark);
            background-color: #e11d48;
        }

        /* Articles & Wiki Component */
        .article-card {
            border: 3px solid var(--dark);
            background-color: var(--white);
            box-shadow: var(--neon-shadow);
            transition: all 0.2s;
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            transform: translate(-3px, -3px);
            box-shadow: 7px 7px 0 var(--dark);
        }

        .article-body {
            padding: 20px;
            display: flex;
            flex-direction: column;
            flex-grow: 1;
        }

        .article-tag {
            background-color: var(--primary);
            color: var(--white);
            font-size: 0.75rem;
            font-weight: 800;
            padding: 3px 8px;
            align-self: flex-start;
            border: 1px solid var(--dark);
            margin-bottom: 12px;
        }

        .article-title {
            font-size: 1.15rem;
            font-weight: 900;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .article-title a {
            color: inherit;
            text-decoration: none;
        }

        .article-title a:hover {
            color: var(--primary);
        }

        .article-excerpt {
            font-size: 0.88rem;
            color: var(--text-muted);
            margin-bottom: 15px;
            flex-grow: 1;
        }

        .article-link {
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            font-size: 0.9rem;
        }

        /* Floating Sidebar & Service Info */
        .floating-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .floating-btn {
            background-color: var(--warning);
            color: var(--dark);
            width: 55px;
            height: 55px;
            border-radius: 50%;
            border: 3px solid var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 3px 3px 0 var(--dark);
            transition: all 0.15s;
            text-decoration: none;
        }

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

        .qr-popup {
            position: absolute;
            bottom: 70px;
            right: 0;
            background: var(--white);
            border: 3px solid var(--dark);
            padding: 15px;
            box-shadow: var(--neon-shadow);
            display: none;
            text-align: center;
            width: 180px;
        }

        .qr-popup img {
            width: 100%;
            height: auto;
            border: 2px solid var(--dark);
            margin-bottom: 8px;
        }

        .qr-popup p {
            font-size: 0.75rem;
            font-weight: 800;
            color: var(--dark);
        }

        .floating-btn-kf:hover + .qr-popup,
        .qr-popup:hover {
            display: block;
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: #cbd5e1;
            padding: 60px 0 30px 0;
            border-top: 3px solid var(--dark);
        }

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

        .footer-logo {
            
            height: 45px;
            margin-bottom: 15px;
        }

        .footer-col h4 {
            color: var(--white);
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
            font-weight: 800;
        }

        .footer-col h4::after {
            content: '';
            display: block;
            width: 30px;
            height: 3px;
            background-color: var(--accent);
            margin-top: 8px;
        }

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

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

        .footer-col ul li a:hover {
            color: var(--secondary);
        }

        .footer-contact-info {
            font-size: 0.9rem;
            line-height: 1.8;
            color: #94a3b8;
        }

        .friend-links {
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid #334155;
            font-size: 0.85rem;
        }

        .friend-links a {
            color: #94a3b8;
            text-decoration: none;
            margin-right: 15px;
            display: inline-block;
        }

        .friend-links a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }

        .footer-bottom a {
            color: #64748b;
        }

        /* Responsive Breakpoints */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.25rem;
            }
            .grid-2 {
                grid-template-columns: 1fr;
            }
            nav {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--white);
                border-bottom: 3px solid var(--dark);
                padding: 20px;
                box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
            }
            nav.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .nav-btn {
                display: block;
                text-align: center;
                margin-top: 10px;
            }
        }