text-align: center;
        }

        .question {
            margin: 20px 0 10px 0;
            font-size: 18px;
            font-weight: bold
        }

        .answer {
            margin: 10px 0 20px 0;
            font-size: 15px;
            color: #666;
        }

        .search_form{
            width:610px;
            height:42px;
            margin: 30px auto 50px auto;
        }

        /*左边输入框设置样式*/
        .input_text{
            width: 500px;
            height: 40px;
 