html {
    font-size: 17px;
   
   
}

@media (min-width: 768px) {
    html {
        font-size: 17px;
       
    }
}
html {
    position: relative;
    min-height: 100%;
}


body {
    text-align: justify;
    font-family: 'Times New Roman', sans-serif;
}
.fb{
    font-weight:bold;
}
.yuanjiao {
    margin: 8px auto;
    flex-shrink: 0;
    height: 40px;
    border-radius: 40px;
    background: #00bfff;
    padding: 5px 20px 5px 20px;
}
.bk {
    color: #000000;
    background: rgba(255,255,255);
    box-sizing: border-box;
    transition: all 750ms ease 0s;
    border: none;
    border-radius: 20px;
    padding: 8px 3px;
}

    .bk:hover {
        background: rgba(255,255,255);
        box-sizing: border-box;
        transition: all 750ms ease 0s;
        border: none;
        box-shadow: 0px 0px 15px rgba(0,0,0,0.3);
    }