/*20201207四个按钮样式*/
#btn{
    display: none;
}
.stui-extra {
    position: fixed;
    right: 50px;
    bottom: 50px;
    z-index: 99;
}
.stui-extra li {
    position: relative;
    padding: 15px 10px 0;
}
.stui-extra li a, .stui-extra li span {
    display: block;
    width: 50px;
    height: 50px;
    line-height: 50px;
    text-align: center;
    border-radius: 4px;
    font-size: 18px;
    cursor: pointer;
}
.stui-extra li a, .stui-extra li span {
    background-color: #FFFFFF;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}
.stui-extra li a.backtop {
    background-color: rgba(0,0,0,0.6);
    color: #FFFFFF;
}
.icon {
    font-size: 16px;
    vertical-align: -1px;
}

.stui-extra li .sideslip {
    display: none;
    position: absolute;
    bottom: 0;
    right: 100%;
    width: 160px;
}
.stui-extra li .sideslip {
    background-color: #FFFFFF;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.1);
}
.img-responsive {
    max-width: 100%;
}
.stui-extra li a .iconfont, .stui-extra li span .iconfont {
    font-size: 23px;
}
.stui-extra li a:hover,.stui-extra li i:hover{
    color: #f2990d;
}
@media (max-width: 991px) {
    @media (max-width: 767px) {
        .stui-extra {
            right: 15px;
            bottom: 80px;
        }
    }
    }
@media (max-width: 991px){
    @media (max-width: 767px){
        .visible-xs {
            display: block !important;
        }
    }
    }
@media (max-width: 991px) {
    @media (max-width: 767px) {

    .stui-extra li {
        padding: 8px 0 0;
    }
}
    }
@media (max-width: 991px) {
    @media (max-width: 767px) {
        .stui-extra li a, .stui-extra li span {
            width: 35px;
            height: 35px;
            line-height: 35px;
            font-size: 18px;
        }
    }
}
@media (max-width: 991px) {
    @media (max-width: 767px) {
        .stui-extra li a .icon, .stui-extra li span .icon {
            font-size: 18px;
        }
    }
}