:root {
            margin: 0;
            background: linear-gradient(120deg, #e0f2fe 0%, #dbeafe 100%);
        }

        /* 仅影响带有 service-section 类的 section */
        .service-section {
            max-width: 1500px;
            margin: 20px auto;
            padding: 0 15px;
            box-sizing: border-box;
        }

        /* 基本样式设置 */
        .service-container {
            min-height: 350px;
            border: 1px solid #eee;
            border-radius: 5px;
            display: flex;
            padding: 10px;
            box-sizing: border-box;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            background-color: #fff;
        }

        .service-nav {
            width: 200px;
            border-right: 1px solid #eee;
        }

        .service-nav ul {
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .service-nav li {
            padding: 15px 20px;
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
            border-left: 3px solid transparent;
        }

        .service-nav li:hover {
            background-color: #f1f5f9;
            transform: translateX(5px);
        }

        .service-nav li.active {
            border-left-color: #2196F3;
            background-color: #e8f4fd;
            color: #2196F3;
            font-weight: 600;
        }

        .service-nav li::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: #2196F3;
            transition: width 0.3s ease;
        }

        .service-nav li:hover::after,
        .service-nav li.active::after {
            width: 100%;
        }

        .service-content {
            flex: 1;
            padding: 0 20px;
            position: relative;
        }

        .service-item {
            display: none;
            animation: fadeIn 0.5s ease-in-out;
            position: absolute;
            width: calc(100% - 40px);
            opacity: 0;
            transform: translateY(10px);
        }

        .service-item.active {
            display: block;
            opacity: 1;
            transform: translateY(0);
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(10px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .logo-group {
            display: flex;
            justify-content: space-between;
            margin-top: 20px;
        }

        .logo-group a {
            flex-basis: 30%;
            text-align: center;
        }

        .logo-group img {
            max-width: 100%;
            transition: transform 0.3s ease;
            filter: grayscale(30%);
        }

        .logo-group img:hover {
            transform: scale(1.05);
            filter: grayscale(0);
            box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
        }

        h2 {
            color: #333;
            margin-top: 0;
            position: relative;
            padding-bottom: 10px;
        }

        h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: #2196F3;
        }

        p {
            color: #666;
            line-height: 1.6;
        }