article {
  background-color: unset;
  box-sizing: border-box;
  padding: 0;
}
#yodogawa,
.content_wrap section,
.content_wrap section#information,
.content_wrap section#information_free {
  padding-left: 20px;
  padding-right: 20px;
}
#kv {
  display: flex;
  width: 100vw;
  justify-content: center;
  align-items: center;
  margin-left: calc((100vw - 100%) / 2 * -1);
}
@media (max-width: 640px) {
  #kv {
    width: 100vw;
    margin-left: auto;
    margin-right: auto;
  }
}