body {
    background: #fff;
}
.box {
    padding: 0.6rem;
}
.box .txt {
    font-size: 0.48rem;
    line-height: 0.72rem;
    color: #333;
}
.box .textarea_box {
    margin-top: 0.7rem;
    padding: 0.6rem;
    height: 7rem;
    border: 1px solid #666;
    overflow: hidden;
}
.box .textarea_box textarea {
    width: 100%;
    height: 100%;
    line-height: 0.72rem;
    font-size: 0.48rem;
    color: #333;
}