.instruction {
    padding: 10px 50px;
    line-height: 1.8;
}
.instruction .tit {
    font-size: 16px;
    font-weight: bold;
}
.content {
    border-radius: 5px;
    margin: 0 50px;
}
.content .serial {
    margin-top: 20px;
    line-height: 50px;
    background: #91c9e4;
    color: black;
    padding-left: 20px;
    font-size: 16px;
    font-weight: bold;
}
.content .serial .num {
    margin: 0 10px;
}
.content .preQuestion {
    padding: 50px 50px;
    border: 1px solid #999999;
    background: #eeeeee;
    border-top: 0;
    /* border-bottom-left-radius: 5px;
    border-bottom-right-radius: 5px; */
}
.content .preQuestion .question {
    line-height: 30px;
    margin-bottom: 20px;
    font-weight: bold;
}
.content .preQuestion .answers {
    line-height: 30px;
}
.content .preQuestion .answers input[type="radio"] {
    position: relative;
    top: 2px;
}
.content .preQuestion .opt {
    display: flex;
    margin-top: 20px;
    justify-content: space-between;
}
.content .preQuestion .opt span {
    margin-right: 30px;
    color: #6ac4f1;
    cursor: pointer;
}
.content .footer .submitBtn {
    cursor: pointer;
    color: white;
    background: #d11e1e;
    display: inline-block;
    border-radius: 4px;
    margin: 5px;
    padding: 3px 10px;
}
.content .footer .err_msg {
    color: #d11e1e;
}
.content .footer .err_msg .toUnanswerQuestion {
    /* color: black; */
    font-weight: bold;
    cursor: pointer;
    text-decoration: underline;
}