:root {
            --primary: #FACC15; /* 鲜黄耀眼主色 */
            --primary-hover: #EAB308;
            --primary-light: #FEF08A;
            --dark: #0F172A; /* 深色辅助 */
            --dark-light: #1E293B;
            --light: #F8FAFC;
            --white: #FFFFFF;
            --gray: #64748B;
            --gray-light: #E2E8F0;
            --border-radius: 12px;
            --shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
            --shadow-hover: 0 20px 25px -5px rgba(250, 204, 21, 0.15), 0 8px 10px -6px rgba(250, 204, 21, 0.15);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

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

        /* Utilities */
        .section-padding {
            padding: 80px 0;
        }
        .section-title-wrap {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--dark);
            position: relative;
            display: inline-block;
            margin-bottom: 15px;
        }
        .section-title::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }
        .section-subtitle {
            color: var(--gray);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto;
        }
        .badge {
            background-color: var(--primary-light);
            color: var(--dark);
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            font-size: 1rem;
            font-weight: 700;
            border-radius: var(--border-radius);
            cursor: pointer;
            transition: var(--transition);
            border: none;
            outline: none;
        }
        .btn-primary {
            background-color: var(--primary);
            color: var(--dark);
            box-shadow: 0 4px 6px -1px rgba(250, 204, 21, 0.4);
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
        }
        .btn-dark {
            background-color: var(--dark);
            color: var(--white);
        }
        .btn-dark:hover {
            background-color: var(--dark-light);
            transform: translateY(-2px);
        }

        /* Float Elements */
        .float-bar {
            position: fixed;
            right: 20px;
            bottom: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }
        .float-item {
            background-color: var(--white);
            border: 2px solid var(--primary);
            border-radius: 50%;
            width: 50px;
            height: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow);
            cursor: pointer;
            position: relative;
        }
        .float-item:hover .float-tooltip {
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .float-tooltip {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--white);
            border: 1px solid var(--gray-light);
            padding: 15px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            opacity: 0;
            pointer-events: none;
            transform: translateY(10px);
            transition: var(--transition);
            width: 220px;
            text-align: center;
        }
        .float-tooltip img {
            width: 150px;
            height: 150px;
            margin-bottom: 8px;
        }

        /* Navigation */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: sticky;
            top: 0;
            z-index: 1000;
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
            border-bottom: 2px solid var(--primary);
        }
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .ai-page-logo {
            height: 40px;
            width: auto;
        }
        .brand-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--dark);
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 25px;
            list-style: none;
        }
        .nav-links a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--dark-light);
        }
        .nav-links a:hover {
            color: var(--primary-hover);
        }
        .nav-btns {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .menu-toggle {
            display: none;
            font-size: 1.5rem;
            background: none;
            border: none;
            cursor: pointer;
        }

        /* Hero Section (No Images!) */
        .hero {
            background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
            color: var(--white);
            padding: 120px 0;
            position: relative;
            text-align: center;
            overflow: hidden;
        }
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 80% 20%, rgba(250, 204, 21, 0.15) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-h1 {
            font-size: 3rem;
            font-weight: 900;
            margin-bottom: 25px;
            line-height: 1.2;
            letter-spacing: -1px;
        }
        .hero-h1 span {
            color: var(--primary);
            position: relative;
        }
        .hero-p {
            font-size: 1.25rem;
            max-width: 800px;
            margin: 0 auto 40px auto;
            color: var(--gray-light);
        }
        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
            flex-wrap: wrap;
        }
        .hero-tags {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }
        .hero-tag-item {
            background-color: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(250, 204, 21, 0.3);
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--primary-light);
        }

        /* About Section & Platform Intro */
        .about-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--dark);
        }
        .about-text p {
            color: var(--gray);
            margin-bottom: 20px;
        }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }
        .intro-feature-card {
            background-color: var(--white);
            padding: 20px;
            border-radius: var(--border-radius);
            border-left: 4px solid var(--primary);
            box-shadow: var(--shadow);
        }
        .intro-feature-card h4 {
            font-size: 1.05rem;
            margin-bottom: 8px;
        }
        .intro-feature-card p {
            font-size: 0.9rem;
            margin: 0;
        }
        .about-stats {
            background-color: var(--white);
            border: 3px solid var(--primary);
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            text-align: center;
        }
        .stat-val {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 5px;
        }
        .stat-val span {
            color: var(--primary-hover);
        }
        .stat-lbl {
            font-size: 0.9rem;
            color: var(--gray);
            font-weight: 600;
        }

        /* Services Cards Grid */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
        }
        .service-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 35px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 2px solid transparent;
            position: relative;
            overflow: hidden;
        }
        .service-card:hover {
            transform: translateY(-8px);
            border-color: var(--primary);
            box-shadow: var(--shadow-hover);
        }
        .service-icon {
            font-size: 2rem;
            background-color: var(--primary-light);
            width: 60px;
            height: 60px;
            border-radius: var(--border-radius);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
        }
        .service-card h3 {
            margin-bottom: 15px;
            font-size: 1.3rem;
        }
        .service-card p {
            color: var(--gray);
            font-size: 0.95rem;
        }
        .model-list-wrapper {
            margin-top: 20px;
            padding-top: 15px;
            border-top: 1px dashed var(--gray-light);
        }
        .model-tag {
            display: inline-block;
            background-color: var(--light);
            padding: 3px 8px;
            font-size: 0.75rem;
            border-radius: 4px;
            margin: 2px;
            color: var(--dark-light);
            font-weight: 500;
        }

        /* Solutions Section */
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }
        .solution-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            padding: 30px;
            transition: var(--transition);
        }
        .solution-card:hover {
            box-shadow: var(--shadow-hover);
            transform: scale(1.02);
        }
        .solution-card h3 {
            font-size: 1.25rem;
            margin-bottom: 15px;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 10px;
            display: inline-block;
        }
        .solution-card ul {
            list-style: none;
            margin-top: 15px;
        }
        .solution-card ul li {
            font-size: 0.9rem;
            color: var(--gray);
            margin-bottom: 8px;
            position: relative;
            padding-left: 15px;
        }
        .solution-card ul li::before {
            content: '✓';
            color: var(--primary-hover);
            font-weight: bold;
            position: absolute;
            left: 0;
        }

        /* Network Section */
        .network-wrap {
            background: linear-gradient(135deg, #1E293B 0%, #0F172A 100%);
            border-radius: var(--border-radius);
            color: var(--white);
            padding: 50px;
            text-align: center;
        }
        .network-nodes {
            display: flex;
            justify-content: space-around;
            flex-wrap: wrap;
            gap: 30px;
            margin-top: 40px;
        }
        .node-card {
            background-color: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(250, 204, 21, 0.2);
            border-radius: var(--border-radius);
            padding: 25px 35px;
            flex: 1;
            min-width: 200px;
        }
        .node-card h4 {
            color: var(--primary);
            font-size: 1.2rem;
            margin-bottom: 10px;
        }
        .node-card p {
            font-size: 0.9rem;
            color: var(--gray-light);
        }

        /* AIGC Process Step */
        .process-flow {
            display: flex;
            justify-content: space-between;
            gap: 20px;
            position: relative;
            flex-wrap: wrap;
            margin-top: 40px;
        }
        .process-step {
            background-color: var(--white);
            border-radius: var(--border-radius);
            padding: 30px 20px;
            flex: 1;
            min-width: 200px;
            text-align: center;
            box-shadow: var(--shadow);
            position: relative;
            z-index: 2;
            border-bottom: 4px solid var(--primary);
        }
        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary);
            color: var(--dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin: 0 auto 20px auto;
        }
        .process-step h4 {
            margin-bottom: 10px;
        }
        .process-step p {
            font-size: 0.88rem;
            color: var(--gray);
        }

        /* Case Center */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .case-card {
            background-color: var(--white);
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
        }
        .case-img-container {
            width: 100%;
            overflow: hidden;
            position: relative;
            background-color: var(--gray-light);
        }
        .case-img-container img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            display: block;
            transition: var(--transition);
        }
        .case-card:hover .case-img-container img {
            transform: scale(1.05);
        }
        .case-body {
            padding: 25px;
        }
        .case-body h4 {
            margin-bottom: 10px;
            font-size: 1.15rem;
        }
        .case-body p {
            font-size: 0.9rem;
            color: var(--gray);
        }

        /* Comparisons Table */
        .table-responsive {
            overflow-x: auto;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            background-color: var(--white);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }
        .compare-table th, .compare-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--gray-light);
        }
        .compare-table th {
            background-color: var(--dark);
            color: var(--white);
            font-weight: 700;
        }
        .compare-table tr:hover {
            background-color: rgba(250, 204, 21, 0.05);
        }
        .compare-table td strong {
            color: var(--dark);
        }
        .highlight-col {
            background-color: rgba(250, 204, 21, 0.08);
            border-left: 2px solid var(--primary);
            border-right: 2px solid var(--primary);
        }
        .rating-badge {
            background-color: var(--primary);
            color: var(--dark);
            padding: 6px 12px;
            border-radius: 20px;
            font-weight: bold;
            font-size: 0.95rem;
            display: inline-block;
        }

        /* FAQ Accordion */
        .faq-grid {
            display: flex;
            flex-direction: column;
            gap: 15px;
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background-color: var(--white);
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            border-left: 5px solid var(--primary);
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-header {
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 700;
        }
        .faq-icon {
            transition: var(--transition);
            font-weight: bold;
        }
        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: var(--transition);
            background-color: var(--light);
        }
        .faq-body-content {
            padding: 20px;
            color: var(--gray);
            font-size: 0.95rem;
        }
        .faq-item.active .faq-body {
            max-height: 200px;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        /* Review Section */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        .review-card {
            background-color: var(--white);
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            border-top: 5px solid var(--primary);
        }
        .review-text {
            font-style: italic;
            color: var(--dark-light);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }
        .review-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .review-user-info h4 {
            font-size: 1rem;
            margin-bottom: 2px;
        }
        .review-user-info span {
            font-size: 0.8rem;
            color: var(--gray);
        }

        /* Token Rate Table */
        .token-card {
            background-color: var(--white);
            padding: 30px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            margin-bottom: 30px;
        }

        /* Form */
        .form-wrap {
            max-width: 600px;
            margin: 0 auto;
            background-color: var(--white);
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            border: 3px solid var(--primary);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--gray-light);
            border-radius: 8px;
            font-size: 1rem;
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary-hover);
            outline: none;
            box-shadow: 0 0 0 3px rgba(250, 204, 21, 0.2);
        }

        /* Article / Knowledge Base */
        .articles-list {
            list-style: none;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }
        .article-item {
            background-color: var(--white);
            padding: 20px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        .article-item:hover {
            transform: translateX(5px);
            background-color: rgba(250, 204, 21, 0.05);
        }
        .article-item a {
            display: flex;
            flex-direction: column;
        }
        .article-title {
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 5px;
        }
        .article-link {
            font-size: 0.85rem;
            color: var(--gray);
            word-break: break-all;
        }

        /* Footer */
        footer {
            background-color: var(--dark);
            color: var(--white);
            padding: 60px 0 20px 0;
            font-size: 0.9rem;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            margin-bottom: 20px;
        }
        .footer-about p {
            color: var(--gray-light);
            margin-bottom: 15px;
        }
        .footer-links h4, .footer-contact h4 {
            color: var(--primary);
            font-size: 1.1rem;
            margin-bottom: 20px;
        }
        .footer-links ul {
            list-style: none;
        }
        .footer-links ul li {
            margin-bottom: 10px;
        }
        .footer-links ul li a:hover {
            color: var(--primary);
        }
        .footer-contact p {
            margin-bottom: 10px;
            color: var(--gray-light);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .footer-bottom-links {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
        }
        .footer-bottom-links a {
            font-size: 0.85rem;
            color: var(--gray-light);
        }
        .footer-bottom-links a:hover {
            color: var(--primary);
        }

        /* Responsive Media Queries */
        @media (max-width: 992px) {
            .about-grid {
                grid-template-columns: 1fr;
            }
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background-color: var(--white);
                padding: 20px;
                box-shadow: 0 4px 10px rgba(0,0,0,0.1);
                border-top: 2px solid var(--primary);
            }
            .nav-links.active {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-h1 {
                font-size: 2.2rem;
            }
            .articles-list {
                grid-template-columns: 1fr;
            }
        }