* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }
        
        body {
            background-color: #f8f9fa;
            color: #333;
            line-height: 1.6;
        }
        
        /* 导航栏样式 */
        .nav {
            background-color: #fff;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
            height: 80px;
            display: flex;
            align-items: center;
        }
        
        .na1 {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .na1 ul {
            list-style: none;
            display: flex;
            gap: 30px;
        }
        
        .na1 ul li {
            position: relative;
        }
        
        .na1 ul li a {
            text-decoration: none;
            color: #333;
            font-weight: 500;
            font-size: 20px;
            padding: 15px 0;
            position: relative;
        }
        
        .na1 ul li a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 3px;
            bottom: 10px;
            left: 0;
            background-color: #d63031;
            transition: width 0.3s ease;
        }
        
        .na1 ul li a:hover::after {
            width: 100%;
        }
        
        .na1 ul li > div {
            position: absolute;
            top: 100%;
            left: 0;
            background: white;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border-radius: 0 0 5px 5px;
            display: none;
            flex-direction: column;
            min-width: 200px;
            z-index: 100;
            padding: 10px 0;
        }
        
        .na1 ul li > div a {
            padding: 12px 20px;
            display: block;
            color: #555;
            font-size: 16px;
            transition: all 0.3s;
        }
        
        .na1 ul li > div a:hover {
            background: #f8f9fa;
            color: #d63031;
        }
        
        .na1 ul li:hover > div {
            display: flex;
        }
        
        .right-section {
            display: flex;
            align-items: center;
            gap: 20px;
        }
        
        .language {
            cursor: pointer;
            font-size: 20px;
        }
        
        .phone-number {
            font-weight: 500;
            font-size: 20px;
        }
        
        .company-name {
            text-align: center;
            padding: 50px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
        }
        
        .company-name h1 {
            font-size: 36px;
            margin-bottom: 15px;
            color: #ff0000;
        }
        
        .company-name p {
            font-size: 20px;
            color: #7f8c8d;
        }
        
        /* 解决方案内容区域 */
        .solution-container {
            max-width: 1200px;
            margin: 50px auto;
            padding: 0 20px;
        }
        
        .solution-header {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .solution-header h2 {
            font-size: 36px;
            color: #2c3e50;
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
        }
        
        .solution-header h2::after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: #d63031;
        }
        
        .solution-header p {
            color: #7f8c8d;
            max-width: 800px;
            margin: 30px auto 0;
            font-size: 18px;
            line-height: 1.8;
        }
        
        .solution-overview {
            display: flex;
            gap: 40px;
            margin-bottom: 60px;
            align-items: center;
        }
             .solutions-section {
            margin-bottom: 60px;
        }
        
        .solutions-section h3 {
            text-align: center;
            font-size: 1.8rem;
            color: var(--secondary-color);
            margin-bottom: 40px;
        }
        
        .solutions-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(270px, 1fr));
            gap: 30px;
        }
        
        .solution-card {
            background: white;
            border-radius: 8px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        
        .solution-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .solution-image {
            height: 200px;
            overflow: hidden;
        }
        
        .solution-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s;
        }
        
        .solution-card:hover .solution-image img {
            transform: scale(1.1);
        }
        
        .solution-content {
            padding: 25px;
        }
        
        .solution-content h4 {
            font-size: 1.4rem;
            margin-bottom: 15px;
            color: var(--secondary-color);
        }
        
        .solution-content p {
            color: #555;
            margin-bottom: 20px;
            min-height: 80px;
        }
        
        .solution-btn {
            display: inline-block;
            background-color: var(--primary-color);
            color: white;
            text-decoration: none;
            padding: 12px 25px;
            border-radius: 4px;
            font-weight: 600;
            transition: background-color 0.3s;
            border: none;
            cursor: pointer;
            width: 100%;
            text-align: center;
        }
        
        .solution-btn:hover {
            background-color: #c02a2a;
}
        .overview-content {
            flex: 1;
        }
        
        .overview-content h3 {
            font-size: 28px;
            margin-bottom: 25px;
            color: #2c3e50;
        }
        
        .overview-content p {
            color: #555;
            margin-bottom: 20px;
            font-size: 18px;
            line-height: 1.8;
        }
        
        .overview-image {
            flex: 1;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        }
        
        .overview-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }
        
        .overview-image:hover img {
            transform: scale(1.05);
        }
        
        /* 视频展示区域 */
        .video-section {
            background: linear-gradient(135deg, #f8f9fa 0%, #eef1f5 100%);
            padding: 60px 0;
            margin: 60px 0;
            border-radius: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .video-container {
            max-width: 900px;
            margin: 0 auto;
            text-align: center;
            padding: 0 20px;
        }
        
        .video-container h3 {
            font-size: 28px;
            margin-bottom: 30px;
            color: #2c3e50;
        }
        
        .video-wrapper {
            position: relative;
            padding-bottom: 56.25%; /* 16:9 宽高比 */
            height: 0;
            overflow: hidden;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
            background: #000;
        }
        
        .video-wrapper iframe {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            border: none;
        }
        
        .video-description {
            margin-top: 25px;
            font-size: 16px;
            color: #7f8c8d;
            line-height: 1.7;
        }
        
        /* Bilibili品牌提示 */
        .bilibili-brand {
            position: absolute;
            bottom: 10px;
            right: 10px;
            background: rgba(0, 0, 0, 0.6);
            color: white;
            padding: 5px 10px;
            border-radius: 4px;
            font-size: 12px;
            z-index: 10;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        .bilibili-brand i {
            color: #00a1d6;
        }
        
        /* 技术优势部分 */
        .features-section {
            margin: 60px 0;
        }
        
        .features-section h3 {
            text-align: center;
            font-size: 28px;
            margin-bottom: 50px;
            color: #2c3e50;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background: white;
            border-radius: 10px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            text-align: center;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 80px;
            height: 80px;
            background: #d63031;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 30px;
        }
        
        .feature-card h4 {
            font-size: 22px;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        .feature-card p {
            color: #7f8c8d;
            font-size: 16px;
            line-height: 1.7;
        }
        
        /* 应用场景部分 */
        .applications-section {
            margin: 60px 0;
        }
        
        .applications-section h3 {
            text-align: center;
            font-size: 28px;
            margin-bottom: 50px;
            color: #2c3e50;
        }
        
        .applications-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 25px;
        }
        
        .application-item {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
        }
        
        .application-item:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .application-image {
            height: 200px;
            background-color: #f0f2f5;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 40px;
            color: #d63031;
        }
        
        .application-content {
            padding: 25px;
        }
        
        .application-content h4 {
            font-size: 20px;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        .application-content p {
            color: #7f8c8d;
            font-size: 16px;
            line-height: 1.6;
        }
        
        /* CTA区域 */
        .cta-section {
            background: linear-gradient(135deg, #2c3e50 0%, #1a2530 100%);
            color: white;
            padding: 80px 0;
            text-align: center;
            border-radius: 15px;
            margin: 80px 0;
        }
        
        .cta-section h3 {
            font-size: 36px;
            margin-bottom: 25px;
        }
        
        .cta-section p {
            max-width: 700px;
            margin: 0 auto 40px;
            font-size: 18px;
            line-height: 1.8;
            color: #ecf0f1;
        }
        
        .cta-button {
            display: inline-block;
            padding: 15px 40px;
            background: #d63031;
            color: white;
            text-decoration: none;
            border-radius: 5px;
            font-weight: 500;
            font-size: 18px;
            transition: all 0.3s ease;
            border: 2px solid #d63031;
        }
        
        .cta-button:hover {
            background: transparent;
            color: #d63031;
            transform: translateY(-5px);
        }
        
        /* 右侧中部悬浮咨询按钮 */
        .floating-contact-btn {
            position: fixed;
            right: 30px;
            top: 50%;
            transform: translateY(-50%);
            background: #d63031;
            color: white;
            width: 70px;
            height: 70px;
            border-radius: 50%;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-size: 28px;
            cursor: pointer;
            box-shadow: 0 5px 15px rgba(214, 48, 49, 0.4);
            z-index: 999;
            transition: all 0.3s ease;
            animation: pulse 2s infinite;
        }
        
        .floating-contact-btn:hover {
            transform: translateY(-50%) scale(1.1);
            box-shadow: 0 8px 20px rgba(214, 48, 49, 0.6);
            animation: none;
        }
        
        .floating-contact-btn span {
            font-size: 12px;
            margin-top: 5px;
            font-weight: 500;
        }
        
        @keyframes pulse {
            0% {
                box-shadow: 0 0 0 0 rgba(214, 48, 49, 0.5);
            }
            70% {
                box-shadow: 0 0 0 15px rgba(214, 48, 49, 0);
            }
            100% {
                box-shadow: 0 0 0 0 rgba(214, 48, 49, 0);
            }
        }
        
        /* 咨询表单弹窗样式 */
        .contact-modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }
        
        .modal-content {
            background: white;
            width: 100%;
            max-width: 500px;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
            position: relative;
            animation: modalFadeIn 0.3s ease;
        }
        
        @keyframes modalFadeIn {
            from {
                opacity: 0;
                transform: translateY(-50px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        .close-modal {
            position: absolute;
            top: 15px;
            right: 15px;
            background: none;
            border: none;
            font-size: 28px;
            cursor: pointer;
            color: #7f8c8d;
            z-index: 10;
        }
        
        .close-modal:hover {
            color: #d63031;
        }
        
        .contact-form {
            padding: 35px;
        }
        
        .contact-form h2 {
            font-size: 28px;
            margin-bottom: 25px;
            color: #2c3e50;
            text-align: center;
        }
        
        .form-group {
            margin-bottom: 25px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 10px;
            font-weight: 500;
            color: #2c3e50;
            font-size: 16px;
        }
        
        .form-control {
            width: 100%;
            padding: 14px 16px;
            border: 1px solid #ddd;
            border-radius: 5px;
            font-size: 16px;
            transition: border 0.3s ease;
        }
        
        .form-control:focus {
            border-color: #d63031;
            outline: none;
            box-shadow: 0 0 0 3px rgba(214, 48, 49, 0.2);
        }
        
        .required {
            color: #d63031;
        }
        
        .btn {
            background: #d63031;
            color: white;
            border: none;
            padding: 15px 25px;
            font-size: 18px;
            font-weight: 500;
            border-radius: 5px;
            cursor: pointer;
            width: 100%;
            transition: background 0.3s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
        }
        
        .btn:hover {
            background: #c23616;
        }
        
        .message {
            padding: 18px;
            margin-bottom: 25px;
            border-radius: 5px;
            display: none;
            font-size: 16px;
        }
        
        .success {
            background: #d4edda;
            color: #155724;
            display: block;
        }
        
        .error {
            background: #f8d7da;
            color: #721c24;
            display: block;
        }
        
        /* 页脚样式 */
        footer {
            background: #2c3e50;
            color: white;
            padding: 50px 0 30px;
            margin-top: 70px;
        }
        
        .footer-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 35px;
        }
        
        .footer-column h3 {
            font-size: 22px;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 15px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 60px;
            height: 3px;
            background: #d63031;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 15px;
            font-size: 16px;
        }
        
        .footer-column ul li a {
            color: #ecf0f1;
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .footer-column ul li a:hover {
            color: #d63031;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            margin-top: 40px;
            border-top: 2px solid rgba(255, 255, 255, 0.1);
            color: #bdc3c7;
            font-size: 16px;
        }
        
        /* 响应式调整 */
        @media (max-width: 992px) {
            .na1 ul li a {
                font-size: 16px;
                padding: 12px 0;
            }
            
            .na1 ul li > div a {
                font-size: 14px;
            }
            
            .solution-overview {
                flex-direction: column;
            }
            
            .overview-image {
                order: -1;
                margin-bottom: 30px;
            }
        }
        
        @media (max-width: 768px) {
            .nav {
                height: auto;
                padding: 15px 0;
            }
            
            .na1 {
                flex-wrap: wrap;
            }
            
            .na1 ul {
                width: 100%;
                margin-top: 15px;
                justify-content: center;
                gap: 15px;
                flex-wrap: wrap;
            }
            
            .na1 ul li a {
                font-size: 14px;
                padding: 10px 5px;
            }
            
            .floating-contact-btn {
                width: 60px;
                height: 60px;
                font-size: 24px;
                right: 15px;
            }
            
            .modal-content {
                width: 95%;
            }
            
            .company-name h1 {
                font-size: 28px;
            }
            
            .company-name p {
                font-size: 16px;
            }
            
            .solution-header h2 {
                font-size: 28px;
            }
            
            .solution-header p {
                font-size: 16px;
            }
        }
        
        @media (max-height: 600px) {
            .floating-contact-btn {
                top: auto;
                bottom: 30px;
                transform: none;
            }
        }