* {
    margin: 0;
    padding: 0;
}
ul{
    list-style: none;
}
a {
    text-decoration: none;
    outline: none;
    color: inherit;
}
html, body, ul, li, input, button, h1, h2, h3, h4, p, span {
    margin: 0;
    padding: 0;
}
input::-ms-clear{
    display: none;
}
#app{
    margin-top: 30px;
    margin-bottom: 70px
}
.width-1200 {
    max-width: 1200px;
    margin: 0 auto;
}
.w-1200{
    width: 1200px;
    margin: 0 auto;
}
.flex {
    display: flex;
}
.flex-column{
    flex-direction: column;
}

.flex-wrap {
    flex-wrap: wrap;
}

.align-center {
    align-items: center;
}
.align-end{
    align-items: flex-end;
}

.justify-center {
    justify-content: center;
}

.justify-between {
    justify-content: space-between;
}
.justify-around{
    justify-content: space-around;
}
.justify-evenly{
    justify-content: space-evenly;
}
.content .content-nav{
    margin-bottom: 40px;
    font-size: 14px;
    font-weight: 400;
    color: #606266;
}
.content .content-nav span img{
    margin: 0 11px;
    width: 6px;
    height: 13px;
}
@media screen and (max-width: 1200px) {
    #app {
        padding: 0 10px;
    }
}
@media screen and (max-width: 600px) {

    .width-1200 {
        max-width: 600px;
    }
}