footer {
  width: 100%;
  padding-top: 20px;
  margin-bottom: 40px;
}

.footer-nav {
  max-width: 1130px;
  margin: 0 auto;
  color: #797979;
  padding: 5vmin;
  margin: 0 auto;
  text-align: center;
}
.footer-nav .a {
  line-height: 10vmin;
  color: #797979;
}
.their{
  color: #434343;
}
@media screen and (max-width: 768px) {
  .footer-nav .a {
    line-height:normal;
    font-size: 10px;
  }
  .footer-nav{
    justify-content: space-between;
    flex-wrap: wrap;
  }
  .footer-nav .clause{
    font-size: 12px;
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
  }
  .footer-nav span{
    font-size: 10px;
  }
  .footer-nav .their{
    font-size: 14px;
    margin-top: 20px;
  }
}
@media screen and (min-width: 768px) {
  .footer-nav {
    flex-direction: row;
    align-items: center;
    padding: 0;
  }

  .footer-nav a {
    font-size: 13px;
  }

  .footer-nav .a:hover {
    color: #000;
  }
}