.main-container {
            display: flex;
            justify-content: center;
            align-items: center;
            min-height: calc(100vh - 200px); /* 根据头部和底部高度调整 */
            background: linear-gradient(135deg, #f0f2f5, #e4e6eb); /* 添加渐变背景 */
            padding: 40px 0;
        }

        .right-main {
            width: 100%;
            max-width: 800px; /* 限制表单最大宽度 */
        }

        /* 留言中心样式优化 */
        .message-center {
            background-color: #ffffff;
            padding: 30px;
            border-radius: 15px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            margin-bottom: 30px;
            text-align: center;
            transition: transform 0.3s ease;
        }

        .message-center:hover {
            transform: translateY(-5px);
        }

        .message-center h2 {
            color: #ff6a00;
            font-size: 32px;
            text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.1);
            position: relative;
        }

        .message-center h2::after {
            content: "";
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: #ff6a00;
        }

        /* 表单容器样式优化 */
        .form-container {
            background-color: #ffffff;
            padding: 40px;
            border-radius: 15px;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            transition: transform 0.3s ease;
        }

        .form-container:hover {
            transform: translateY(-5px);
        }

        /* 表单项样式优化 */
        .form-group {
            margin-bottom: 25px;
            display: flex;
            align-items: center;
        }

        .form-group label {
            width: 120px;
            text-align: right;
            margin-right: 20px;
            color: #555555;
            font-weight: 500;
            font-size: 16px;
        }

        .form-control {
            flex: 1;
            padding: 14px;
            border: 2px solid #e0e0e0;
            border-radius: 8px;
            font-size: 16px;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: #ff6a00;
            box-shadow: 0 0 0 3px rgba(255, 106, 0, 0.2);
        }

        .message-textarea {
            height: 180px;
            resize: vertical;
        }

        /* 提交按钮样式优化 */
        .submit-btn {
            display: block;
            width: 100%;
            padding: 15px;
            background-color: #ff6a00;
            color: white;
            border: none;
            border-radius: 8px;
            font-size: 18px;
            font-weight: bold;
            cursor: pointer;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        .submit-btn:hover {
            background-color: #e65c00;
            transform: translateY(-2px);
        }