.body{
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    background-color: #FFFFFF;
    overflow-x: hidden;
    overflow-y: scroll;
}
.top-board{
    width: 100%;
    text-align: left;
    display: flex;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    justify-content: left; /* 水平居中 */
    align-items: end;
}
.top-board-content-unlock{
    background: url('../res/img/credit_card_white.png');
    background-repeat:no-repeat;
    width: 28px;
    height: 28px;
    background-size: 100% 100%;
    display: inline-block;
    float: right;
    top: 8px;
    right: 8px;
    position: absolute;
    margin: 0;
    z-index: 999;
}
.top-board-content-unlock:active{
    transform: scale(0.9);
}
.top-board-content-title{
    font-size: x-large;
    display: block;
    position: absolute;
    bottom: 16px;
    left: 16px;
    color: #FAFAFA;
}

.bottom-board{
    width: 100%;
    display: block;
    text-align: left;
    position: absolute;
    top: 0;
}
.bottom-board-answer{
    color: #212121;
    font-size: large;
    word-break: break-all;
    word-wrap: break-word;
    padding: 8px;
    display: block;
}
.bottom-board-answer-img{
    display: block;
    width: 70%;
    margin-left: auto;
    margin-right: auto;
}
span{
    -webkit-user-select:none;
    -moz-user-select:none;
    -ms-user-select:none;
    user-select:none;
}