:root {
            --primary-color: #E60012;
            --primary-hover: #C5000F;
            --primary-light: #FFF0F1;
            --dark-color: #1A1A1A;
            --text-color: #333333;
            --text-muted: #666666;
            --bg-light: #FAFAFA;
            --border-color: #EEEEEE;
            --container-width: 1200px;
            --transition: all 0.3s ease;
        }

        /* Reset */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-color);
            background-color: #FFFFFF;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        ul {
            list-style: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        /* Grid System */
        .container {
            width: 100%;
            max-width: var(--container-width);
            margin: 0 auto;
            padding: 0 20px;
        }
        .section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }
        .section:nth-of-type(even) {
            background-color: var(--bg-light);
        }
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header h2 {
            font-size: 2rem;
            color: var(--dark-color);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
            padding-bottom: 10px;
        }
        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 50px;
            height: 3px;
            background-color: var(--primary-color);
        }
        .section-header p {
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 30px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: 6px;
            border: 2px solid transparent;
            cursor: pointer;
            transition: var(--transition);
        }
        .btn-primary {
            background-color: var(--primary-color);
            color: #FFFFFF;
        }
        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(230, 0, 18, 0.3);
        }
        .btn-outline {
            border-color: var(--primary-color);
            color: var(--primary-color);
            background-color: transparent;
        }
        .btn-outline:hover {
            background-color: var(--primary-light);
            transform: translateY(-2px);
        }

        /* Navigation */
        .header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }
        .logo-wrap {
            display: flex;
            align-items: center;
        }
        .ai-page-logo {
            max-height: 50px;
            width: auto;
        }
        .nav-menu {
            display: flex;
            gap: 20px;
        }
        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--dark-color);
            padding: 8px 12px;
            border-radius: 4px;
        }
        .nav-link:hover {
            color: var(--primary-color);
            background-color: var(--primary-light);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark-color);
        }

        /* Hero Section (No Image) */
        .hero-section {
            padding: 120px 0;
            background: linear-gradient(135deg, #1A1A1A 0%, #3D0005 50%, #1A1A1A 100%);
            color: #FFFFFF;
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at center, rgba(230, 0, 18, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-content {
            max-width: 900px;
            margin: 0 auto;
            position: relative;
            z-index: 10;
        }
        .hero-tag {
            display: inline-block;
            background-color: rgba(230, 0, 18, 0.2);
            border: 1px solid var(--primary-color);
            color: #FF8F95;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            margin-bottom: 25px;
            font-weight: 600;
            letter-spacing: 1px;
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 25px;
            color: #FFFFFF;
        }
        .hero-title span {
            color: #FF334B;
        }
        .hero-desc {
            font-size: 1.25rem;
            color: #DDDDDD;
            margin-bottom: 40px;
            line-height: 1.8;
        }
        .hero-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 40px;
        }
        .hero-button-primary {
            background-color: var(--primary-color);
            color: #FFFFFF;
            border: 2px solid var(--primary-color);
        }
        .hero-button-primary:hover {
            background-color: var(--primary-hover);
            border-color: var(--primary-hover);
        }
        .hero-meta {
            font-size: 0.95rem;
            color: #AAAAAA;
        }
        .hero-meta span {
            margin: 0 10px;
            color: var(--primary-color);
            font-weight: 600;
        }

        /* Stats Grid */
        .stats-section {
            background-color: var(--dark-color);
            padding: 40px 0;
            border-bottom: 4px solid var(--primary-color);
        }
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            text-align: center;
        }
        .stat-card h3 {
            font-size: 2.5rem;
            font-weight: 800;
            color: #FF334B;
            margin-bottom: 5px;
        }
        .stat-card p {
            color: #CCCCCC;
            font-size: 0.95rem;
        }

        /* Cards Grid */
        .cards-grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .cards-grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        /* Card Styles */
        .service-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(230, 0, 18, 0.08);
            border-color: var(--primary-color);
        }
        .service-card .icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        .service-card h3 {
            font-size: 1.25rem;
            margin-bottom: 12px;
            color: var(--dark-color);
        }
        .service-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* Solutions Layout */
        .solutions-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }
        .solutions-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .solution-item {
            background: #FFFFFF;
            padding: 20px;
            border-left: 4px solid var(--primary-color);
            box-shadow: 0 4px 10px rgba(0,0,0,0.02);
            border-radius: 0 8px 8px 0;
        }
        .solution-item h4 {
            font-size: 1.1rem;
            margin-bottom: 8px;
            color: var(--dark-color);
        }
        .solution-item p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Models Support List */
        .tags-container {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            margin-top: 20px;
        }
        .tag-pill {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--dark-color);
            transition: var(--transition);
        }
        .tag-pill:hover {
            border-color: var(--primary-color);
            color: var(--primary-color);
            background-color: var(--primary-light);
            transform: scale(1.05);
        }

        /* Timeline / Process */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
            position: relative;
        }
        .process-step {
            text-align: center;
            position: relative;
        }
        .process-num {
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(230, 0, 18, 0.2);
        }
        .process-step h4 {
            font-size: 1.1rem;
            margin-bottom: 10px;
            color: var(--dark-color);
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Case Studies (with designated images) */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .case-card {
            background: #FFFFFF;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 4px 15px rgba(0,0,0,0.05);
            transition: var(--transition);
        }
        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.1);
        }
        .case-img-wrap {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/9;
            background-color: #EEE;
        }
        .case-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        .case-card:hover .case-img-wrap img {
            transform: scale(1.05);
        }
        .case-info {
            padding: 20px;
        }
        .case-tag {
            font-size: 0.75rem;
            background-color: var(--primary-light);
            color: var(--primary-color);
            padding: 3px 8px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
        }
        .case-info h4 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--dark-color);
        }
        .case-info p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Evaluation Table */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            margin-top: 30px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.05);
        }
        .eval-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            background-color: #FFFFFF;
            min-width: 800px;
        }
        .eval-table th, .eval-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
        }
        .eval-table th {
            background-color: var(--dark-color);
            color: #FFFFFF;
            font-weight: 600;
        }
        .eval-table tr:hover {
            background-color: rgba(230, 0, 18, 0.02);
        }
        .eval-table td strong {
            color: var(--primary-color);
        }

        /* Score Badge */
        .score-box {
            background: linear-gradient(135deg, var(--primary-color) 0%, #8A000A 100%);
            color: #FFFFFF;
            padding: 30px;
            border-radius: 12px;
            text-align: center;
            margin-bottom: 40px;
            box-shadow: 0 8px 25px rgba(230,0,18,0.25);
        }
        .score-value {
            font-size: 3.5rem;
            font-weight: 800;
            line-height: 1;
            margin-bottom: 10px;
        }
        .score-stars {
            font-size: 1.5rem;
            color: #FFD700;
            margin-bottom: 10px;
        }

        /* Price Table */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .price-card {
            background-color: #FFFFFF;
            border: 2px solid var(--border-color);
            border-radius: 10px;
            padding: 40px 30px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }
        .price-card.featured {
            border-color: var(--primary-color);
            box-shadow: 0 8px 30px rgba(230, 0, 18, 0.08);
        }
        .price-card.featured::before {
            content: '最佳推荐';
            position: absolute;
            top: 0;
            left: 50%;
            transform: translate(-50%, -50%);
            background-color: var(--primary-color);
            color: #FFFFFF;
            padding: 4px 15px;
            font-size: 0.8rem;
            border-radius: 50px;
            font-weight: 600;
        }
        .price-card h3 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        .price-value {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 25px;
        }
        .price-features {
            margin-bottom: 35px;
            text-align: left;
        }
        .price-features li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
            color: var(--text-color);
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* Testimonials */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .review-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 30px;
            position: relative;
            transition: var(--transition);
        }
        .review-card::before {
            content: '“';
            font-size: 4rem;
            color: rgba(230, 0, 18, 0.1);
            position: absolute;
            top: 10px;
            left: 20px;
            line-height: 1;
        }
        .review-text {
            font-size: 0.95rem;
            color: var(--text-color);
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }
        .review-user {
            display: flex;
            align-items: center;
            gap: 15px;
        }
        .review-user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary-color);
            font-weight: 700;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
        }
        .review-user-info h4 {
            font-size: 0.95rem;
            color: var(--dark-color);
        }
        .review-user-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAQ Accordion */
        .faq-wrapper {
            max-width: 900px;
            margin: 0 auto;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: 6px;
            margin-bottom: 12px;
            background-color: #FFFFFF;
            overflow: hidden;
        }
        .faq-trigger {
            width: 100%;
            padding: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: none;
            border: none;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark-color);
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-trigger:hover {
            color: var(--primary-color);
            background-color: var(--primary-light);
        }
        .faq-trigger::after {
            content: '+';
            font-size: 1.4rem;
            color: var(--primary-color);
            transition: var(--transition);
        }
        .faq-item.active .faq-trigger::after {
            content: '-';
            transform: rotate(180deg);
        }
        .faq-content {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
        }
        .faq-inner {
            padding: 0 20px 20px;
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.7;
        }

        /* Form Area */
        .form-contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }
        .contact-form-card {
            background-color: #FFFFFF;
            border: 1px solid var(--border-color);
            padding: 40px;
            border-radius: 12px;
            box-shadow: 0 8px 30px rgba(0,0,0,0.03);
        }
        .form-group {
            margin-bottom: 20px;
        }
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--dark-color);
        }
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            font-size: 0.95rem;
            background-color: var(--bg-light);
            transition: var(--transition);
        }
        .form-control:focus {
            border-color: var(--primary-color);
            background-color: #FFFFFF;
            outline: none;
            box-shadow: 0 0 0 3px rgba(230,0,18,0.1);
        }
        .contact-info-list {
            display: flex;
            flex-direction: column;
            gap: 25px;
        }
        .info-card {
            background: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 25px;
            border-radius: 8px;
            display: flex;
            gap: 15px;
        }
        .info-card .icon {
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        .info-card h4 {
            font-size: 1.05rem;
            margin-bottom: 5px;
            color: var(--dark-color);
        }
        .info-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
        }
        .qr-area {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 30px;
        }
        .qr-box {
            width: 120px;
            height: 120px;
            border: 1px solid var(--border-color);
            padding: 5px;
            background: #fff;
            border-radius: 4px;
        }
        .qr-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* Article List */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .article-card {
            background: #FFFFFF;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            overflow: hidden;
            transition: var(--transition);
        }
        .article-card:hover {
            transform: translateY(-3px);
            border-color: var(--primary-color);
            box-shadow: 0 6px 15px rgba(230,0,18,0.05);
        }
        .article-body {
            padding: 25px;
        }
        .article-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }
        .article-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--dark-color);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .article-link {
            font-size: 0.9rem;
            color: var(--primary-color);
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* Footer */
        .footer {
            background-color: var(--dark-color);
            color: #DDDDDD;
            padding: 60px 0 30px;
            font-size: 0.9rem;
            border-top: 4px solid var(--primary-color);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            margin-bottom: 20px;
            
        }
        .footer-title {
            color: #FFFFFF;
            font-size: 1.1rem;
            margin-bottom: 20px;
            font-weight: 600;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background-color: var(--primary-color);
        }
        .footer-links li {
            margin-bottom: 12px;
        }
        .footer-links a:hover {
            color: var(--primary-color);
            padding-left: 5px;
        }
        .footer-bottom {
            border-top: 1px solid #2D2D2D;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        .footer-copyright p {
            font-size: 0.85rem;
            color: #888888;
        }
        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 15px;
        }
        .friend-links a {
            color: #888888;
            font-size: 0.8rem;
        }
        .friend-links a:hover {
            color: var(--primary-color);
        }

        /* Floating widget */
        .floating-widget {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .float-btn {
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: #FFFFFF;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(230,0,18,0.3);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }
        .float-btn:hover {
            background-color: var(--primary-hover);
            transform: scale(1.05);
        }
        .float-qr-wrap {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 160px;
        }
        .float-qr-wrap img {
            width: 130px;
            height: 130px;
            margin: 0 auto 5px;
        }
        .float-qr-wrap p {
            color: var(--dark-color);
            font-size: 0.75rem;
            font-weight: 600;
        }
        .float-btn:hover .float-qr-wrap {
            display: block;
        }

        /* Responsive Grid Adjustments */
        @media (max-width: 1024px) {
            .cards-grid-3, .cases-grid, .reviews-grid, .article-grid, .price-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cards-grid-4 {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 80px;
                left: 0;
                right: 0;
                background-color: #FFFFFF;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 4px 10px rgba(0,0,0,0.05);
                gap: 10px;
            }
            .nav-menu.show {
                display: flex;
            }
            .nav-toggle {
                display: block;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cards-grid-3, .cases-grid, .reviews-grid, .article-grid, .price-grid, .cards-grid-4 {
                grid-template-columns: 1fr;
            }
            .solutions-wrapper {
                grid-template-columns: 1fr;
            }
            .process-flow {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .form-contact-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }