/* CSS Reset & Variables - 斑斓彩调风 / Modern Vibrant Light Palette */
        :root {
            --primary-color: #4f46e5;
            --primary-hover: #4338ca;
            --secondary-color: #06b6d4;
            --accent-purple: #8b5cf6;
            --accent-pink: #ec4899;
            --accent-amber: #f59e0b;
            --accent-emerald: #10b981;
            --bg-main: #f8fafc;
            --bg-card: #ffffff;
            --bg-card-alt: #f1f5f9;
            --text-title: #0f172a;
            --text-body: #334155;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --shadow-sm: 0 2px 4px rgba(0,0,0,0.03);
            --shadow-md: 0 4px 12px rgba(15, 23, 42, 0.06);
            --shadow-lg: 0 10px 25px rgba(79, 70, 229, 0.1);
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        body {
            overflow-x: hidden;
            width: 100%;
        }

        /* Standard Container System */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.25rem;
        }

        a {
            color: var(--primary-color);
            text-decoration: none;
            transition: var(--transition);
        }

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

        /* Header & Navigation */
        .header-site {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .brand-area {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .ai-page-logo {
            max-height: 42px;
            width: auto;
            display: block;
        }

        .ai-page-home-link {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-title);
            padding: 0.4rem 0.8rem;
            border-radius: 6px;
            background: rgba(79, 70, 229, 0.08);
        }

        /* Strict CSS constraint requirement: gap: 0 */
        .nav-links {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 0;
        }

        .nav-links li a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-title);
            padding: 0.5rem 0.65rem;
            display: inline-block;
            white-space: nowrap;
        }

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

        .header-actions {
            display: flex;
            align-items: center;
            gap: 0.75rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.6rem 1.4rem;
            font-size: 0.9rem;
            font-weight: 600;
            border-radius: 99px;
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
            text-align: center;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-purple));
            color: #ffffff !important;
            box-shadow: 0 4px 14px rgba(79, 70, 229, 0.35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(79, 70, 229, 0.45);
        }

        .btn-outline {
            background: transparent;
            border-color: var(--primary-color);
            color: var(--primary-color) !important;
        }

        .btn-outline:hover {
            background: rgba(79, 70, 229, 0.05);
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--text-title);
            cursor: pointer;
        }

        /* Section Layout Common Styles */
        .section-block {
            padding: 4.5rem 0;
            position: relative;
        }

        .section-alt {
            background-color: #ffffff;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            max-width: 800px;
            margin: 0 auto 3rem auto;
        }

        .section-tag {
            display: inline-block;
            padding: 0.3rem 0.9rem;
            background: linear-gradient(90deg, rgba(79, 70, 229, 0.1), rgba(6, 182, 212, 0.1));
            color: var(--primary-color);
            font-size: 0.85rem;
            font-weight: 700;
            border-radius: 20px;
            margin-bottom: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--text-title);
            margin-bottom: 0.8rem;
            letter-spacing: -0.5px;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-muted);
        }

        /* Section 1: Hero Area (STRICT NO IMAGES IN HERO) */
        .hero-section {
            padding: 4.5rem 0 4rem 0;
            background: radial-gradient(circle at 10% 20%, rgba(79, 70, 229, 0.08) 0%, rgba(6, 182, 212, 0.05) 50%, rgba(248, 250, 252, 1) 100%);
            position: relative;
            overflow: hidden;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 2.5rem;
            align-items: center;
        }

        .hero-content h1 {
            font-size: 2.3rem;
            font-weight: 900;
            color: var(--text-title);
            line-height: 1.25;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #0f172a 0%, #4f46e5 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-body);
            margin-bottom: 1.8rem;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 0.6rem;
            margin-bottom: 2rem;
        }

        .hero-badge-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            padding: 0.4rem 0.85rem;
            border-radius: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-title);
            box-shadow: var(--shadow-sm);
        }

        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            align-items: center;
        }

        .hero-visual-box {
            background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
            border: 1px solid rgba(79, 70, 229, 0.2);
            border-radius: var(--radius-lg);
            padding: 2rem;
            box-shadow: var(--shadow-lg);
            position: relative;
        }

        .hero-visual-header {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .hero-stats-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 1rem;
        }

        .stat-card {
            background: #ffffff;
            padding: 1.2rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            text-align: center;
        }

        .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 0.2rem;
        }

        .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Section 2: Platform Overview */
        .about-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.8rem;
            transition: var(--transition);
            box-shadow: var(--shadow-sm);
        }

        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
            border-color: var(--primary-color);
        }

        .feature-icon-box {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(6, 182, 212, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--primary-color);
            margin-bottom: 1.2rem;
            font-weight: bold;
        }

        .feature-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 0.6rem;
        }

        .feature-desc {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Section 3: AIGC Services Grid & Supported Models */
        .service-tags-wrapper {
            margin-bottom: 2.5rem;
            background: #ffffff;
            padding: 1.5rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .model-tags-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 1rem;
        }

        .model-tags-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
        }

        .model-tag-pill {
            background: var(--bg-card-alt);
            color: var(--text-body);
            font-size: 0.8rem;
            padding: 0.3rem 0.65rem;
            border-radius: 6px;
            font-weight: 500;
            border: 1px solid var(--border-color);
        }

        .scenarios-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.2rem;
        }

        .scenario-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.25rem;
            transition: var(--transition);
        }

        .scenario-card:hover {
            border-color: var(--secondary-color);
            box-shadow: var(--shadow-md);
        }

        .scenario-name {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 0.4rem;
        }

        .scenario-detail {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Section 4 & 7: Process & One-stop Workflows */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
            position: relative;
        }

        .step-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            text-align: center;
            position: relative;
        }

        .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--primary-color);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            margin: 0 auto 1rem auto;
            font-size: 0.95rem;
        }

        .step-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 0.5rem;
        }

        .step-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Section 8: Case Center & Media Presentation */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
            margin-bottom: 2rem;
        }

        .case-item-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }

        .case-img-wrap {
            width: 100%;
            overflow: hidden;
            background: #e2e8f0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-img-wrap img {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
            transition: var(--transition);
        }

        .case-item-card:hover img {
            transform: scale(1.03);
        }

        .case-info {
            padding: 1.25rem;
        }

        .case-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-title);
            margin-bottom: 0.4rem;
        }

        .case-tag {
            font-size: 0.8rem;
            color: var(--primary-color);
            font-weight: 600;
            margin-bottom: 0.5rem;
            display: inline-block;
        }

        .case-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .banner-showcase {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1rem;
            margin-top: 2rem;
            background: #ffffff;
            padding: 1rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        /* Section 9 & 11: Comparison & Token Pricing Tables */
        .rating-box {
            background: linear-gradient(135deg, rgba(79, 70, 229, 0.05), rgba(236, 72, 153, 0.05));
            border: 1px solid rgba(79, 70, 229, 0.2);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            margin-bottom: 2rem;
            display: flex;
            align-items: center;
            justify-content: space-around;
            text-align: center;
        }

        .rating-stars {
            font-size: 1.5rem;
            color: var(--accent-amber);
            font-weight: bold;
        }

        .rating-score {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary-color);
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background: #ffffff;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            margin-bottom: 2rem;
        }

        .custom-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            font-size: 0.9rem;
        }

        .custom-table th {
            background: var(--bg-card-alt);
            color: var(--text-title);
            padding: 1rem;
            font-weight: 700;
            border-bottom: 2px solid var(--border-color);
            white-space: nowrap;
        }

        .custom-table td {
            padding: 1rem;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-body);
        }

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

        .custom-table tr:nth-child(even) td {
            background-color: #fafafa;
        }

        .highlight-cell {
            color: var(--primary-color);
            font-weight: 700;
        }

        /* Section 13: FAQ Accordion */
        .faq-list {
            max-width: 900px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 1rem;
        }

        .faq-item {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-question {
            padding: 1.25rem 1.5rem;
            font-weight: 700;
            color: var(--text-title);
            font-size: 1rem;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            user-select: none;
        }

        .faq-answer {
            padding: 0 1.5rem 1.25rem 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
            display: none;
            line-height: 1.6;
        }

        .faq-item.active {
            border-color: var(--primary-color);
            box-shadow: var(--shadow-sm);
        }

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

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s ease;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* Section 16: User Testimonials */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 1.5rem;
        }

        .review-card {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 0.9rem;
            color: var(--text-body);
            margin-bottom: 1.2rem;
            font-style: italic;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 0.8rem;
        }

        .avatar-placeholder {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 0.9rem;
        }

        .user-info {
            display: flex;
            flex-direction: column;
        }

        .user-name {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-title);
        }

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

        /* Section 18 & Contact: Form & Contact Info */
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2.5rem;
            align-items: start;
        }

        .contact-info-box {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem;
        }

        .contact-item {
            margin-bottom: 1.2rem;
            display: flex;
            align-items: flex-start;
            gap: 0.8rem;
        }

        .contact-label {
            font-weight: 700;
            color: var(--text-title);
            min-width: 80px;
        }

        .contact-qr-wrap {
            margin-top: 1.5rem;
            text-align: center;
            padding: 1rem;
            background: var(--bg-card-alt);
            border-radius: var(--radius-md);
        }

        .contact-qr-wrap img {
            max-width: 140px;
            height: auto;
            border-radius: 8px;
            display: block;
            margin: 0.5rem auto 0 auto;
        }

        .form-box {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 2rem;
            box-shadow: var(--shadow-sm);
        }

        .form-group {
            margin-bottom: 1.2rem;
        }

        .form-label {
            display: block;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--text-title);
            margin-bottom: 0.4rem;
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 0.75rem 1rem;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 0.9rem;
            color: var(--text-body);
            background: #ffffff;
            transition: var(--transition);
        }

        .form-input:focus, .form-select:focus, .form-textarea:focus {
            outline: none;
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
        }

        /* Section 15: Articles & News */
        .articles-list-box {
            background: #ffffff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem;
            margin-top: 1.5rem;
        }

        .article-links-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
            margin-top: 1rem;
        }

        .article-link-btn {
            background: var(--bg-card-alt);
            color: var(--text-title);
            padding: 0.5rem 1rem;
            border-radius: 6px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 1px solid var(--border-color);
        }

        .article-link-btn:hover {
            background: var(--primary-color);
            color: #ffffff !important;
        }

        /* Footer System - Light Contrast Safe */
        .footer-site {
            background-color: #0f172a;
            color: #f8fafc;
            padding: 3.5rem 0 1.5rem 0;
            font-size: 0.88rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 2fr;
            gap: 2rem;
            margin-bottom: 2.5rem;
        }

        .footer-col h4 {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .footer-col p {
            color: #94a3b8;
            margin-bottom: 0.8rem;
            line-height: 1.5;
        }

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

        .footer-links-list li {
            margin-bottom: 0.5rem;
        }

        .footer-links-list a {
            color: #94a3b8;
        }

        .footer-links-list a:hover {
            color: #ffffff;
        }

        .friend-links-box {
            border-top: 1px solid #1e293b;
            padding-top: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .friend-links-title {
            color: #cbd5e1;
            font-weight: 700;
            font-size: 0.9rem;
            margin-bottom: 0.75rem;
        }

        .friend-links-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 0.8rem;
        }

        .friend-links-flex a {
            color: #94a3b8;
            font-size: 0.85rem;
        }

        .friend-links-flex a:hover {
            color: #38bdf8;
        }

        .copyright-bar {
            text-align: center;
            padding-top: 1.5rem;
            border-top: 1px solid #1e293b;
            color: #64748b;
            font-size: 0.8rem;
        }

        /* Floating Widgets */
        .float-widget {
            position: fixed;
            bottom: 25px;
            right: 25px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--primary-color);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            font-weight: bold;
            font-size: 0.85rem;
            transition: var(--transition);
            border: none;
        }

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

        /* Responsive Media Queries */
        @media (max-width: 1024px) {
            .scenarios-grid { grid-template-columns: repeat(3, 1fr); }
            .hero-grid { grid-template-columns: 1fr; }
            .cases-grid { grid-template-columns: repeat(2, 1fr); }
            .reviews-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background: #ffffff;
                flex-direction: column;
                padding: 1rem;
                box-shadow: var(--shadow-md);
                border-bottom: 1px solid var(--border-color);
            }
            .nav-links.active {
                display: flex;
            }
            .nav-links li {
                width: 100%;
                text-align: center;
            }
            .nav-links li a {
                padding: 0.75rem 0;
                display: block;
            }
            .menu-toggle {
                display: block;
            }
            .scenarios-grid { grid-template-columns: repeat(2, 1fr); }
            .about-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .contact-grid { grid-template-columns: 1fr; }
            .reviews-grid { grid-template-columns: 1fr; }
            .banner-showcase { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
            .hero-content h1 { font-size: 1.75rem; }
        }

        @media (max-width: 480px) {
            .scenarios-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr; }
            .cases-grid { grid-template-columns: 1fr; }
        }