/*百分比相对于父元素wrap*/
.logo {
    width: 25%;
    background: url("../images/Brand.png") no-repeat left;
    background-size: 178px;
}

.search {
    width: 40%;
}

.nav-bar {
    width: 35%;
}

.btn {
    display: none;
}

/*登录*/
.login {
    height: 460px;
}

.mi-logo, .form {
    margin-top: 75px;
}

.mi-logo {
    width: 70%;
}

.form {
    width: 30%;
}
/*新课速递*/
.home-item{
    width: 64%;
}
/*热门课程*/
.hot-course-box>div{
    width: 33.33%;
}
/*热门标签*/
.home>.wrap{
    position: relative;
}
.hot-tag{
    position: absolute;
    top: 0;
    right: 0;
    width: 31%;
}