.about-us::before{
    content: '';
    display: block;
    position: relative;
    z-index: -1;
    bottom: 0;
    margin-top: -3em;
    transform: skewY(-3deg);
    -webkit-transform: skewY(-3deg);
    height: 5em;
    background-color: white;
}
.about-us::after{
    content: '';
    display: block;
    position: relative;
    z-index: -1;
    bottom: 0;
    margin-bottom: -2em;
    transform: skewY(-3deg);
    -webkit-transform: skewY(-3deg);
    height: 5em;
    background-color: white;
}
.about-us{
    background-color: white;
    width: 100%;
    position: relative;
    display: grid;
    z-index: 5;
}
.about-us-big{
    display: none;
}
.about-us-small{
    margin: auto;
    width: 90%;
    display: flex;
    flex-direction: column;
}
.about-us-small header{
    text-align: center;
    margin: auto;
    width: 80%;
}
.about-us-small header hr{
    height: 0;
    border-style: solid;
}

.about-us-small main{
    margin: auto;
    width: 80%; 
}
.about-us-small h2{
    font-size: 1.2em;
    text-align: center;
}
.about-us-small main p{
    text-align: center;
    margin: 1em;
}