.m_bg{
    position: fixed;
    top: 0;
    left: 0;
    z-index: 10;
    width: 100%;
    height: 100vh;
    background-color: rgba(0,0,0,0.3);
}
.modal_writing{
    position: fixed;
    top: 8vh;
    left: calc((100% - 420px) / 2);
    z-index: 11;
    width: 420px;
    background: url("../images/tk_bg.png") no-repeat;
    background-size: 100% auto;
    background-color: #fff;
    border-radius: 15px;
    padding-bottom: 30px;
}
.mclose{
    width: 94%;
    padding-top: 20px;
    text-align: right;
}
.mclose img{
    width: 24px;
}
.mtext{
    width: 92%;
    margin: 0 auto;
    color: black;
    text-align: center;
    line-height: 37px;
    font-size: 22px;
    padding-top: 60px;
    text-shadow: 2px 2px 6px #fff;
}
.into_writing{
    width: 100%;
    text-align: center;
    margin-top: 52px;
}
.into_writing p{
    font-size: 15px;
    line-height: 24px;
    color: #777;
    letter-spacing: 0;
}
.into_writing a{
    display: inline-block;
    width: 68%;
    height: 40px;
    text-align: center;
    line-height: 40px;
    color: #fff;
    border-radius: 40px;
    font-size: 18px;
    margin: 10px 1%;
    background-color: #fa6e46;
    text-decoration: none;
    padding: 0;
    box-shadow: none;
    font-weight: normal;
}
.add_wx{
    width: 100%;
    text-align: center;
    margin-top: 10px;
    color: #999;
    font-size: 14px;
    line-height: 28px;
}
@media screen and (max-width: 750px) {
    .modal_writing{
        position: fixed;
        top: 10vh;
        left:5%;
        z-index: 11;
        width: 90%;
        padding-bottom: 40px;
    }
    .mclose  img{
        width: 18px;
    }
    .mtext{
        color: #000;
        line-height: 30px;
        font-size: 18px;
        padding-top: 50px;
        font-weight: bold;
    }
    .into_writing{
        margin-top: 40px;
    }
    .into_writing p{
        font-size: 13px;
    }
    .into_writing a{
        width: 46%;
        height: 34px;
        line-height: 34px;
        font-size: 15px;
        margin: 4px 1%;
    }
}