#sec1 {
    padding-bottom: 0;
}

.inner {
    max-width: 900px;
    margin: 0 auto;
}
.inner img {
    vertical-align: bottom;
}
.inner a {
    display: block;
    background: black;
    color: white;
    text-align: center;
    padding: 10px;
    letter-spacing: 0.1em;
    border: 2px solid black;
    transition: all .3s ease-in-out;
}
.inner a span{
    position: relative;
}
.inner a span::after{
    content: "";
    display: inline-block;
    width: 10px;
    height: 10px;
    border-top: 2px solid white;
    border-right: 2px solid white;
    transform: rotate(45deg);
    margin-left: 10px;
    transition: all .3s ease-in-out;
}
.inner a:hover{
    background: white;
    color: black;
}
.inner a:hover span::after{
    border-color: black;
}
@media (max-width: 767px) {
    .inner a {
        font-size: 14px;
    }
}