* {
  box-sizing: border-box;
}
#kv {
  width: 1040px;
  max-width: 100vw;
  margin-left: calc((1040px - 100%) / 2 * -1);
  margin-bottom: 2em;
}
img {
  max-width: 100%;
}
#yodogawa img {
  width: 480px;
}
article {
  background-color: unset;
  padding: 0;
}
nav {
  display: none;
}
#yodogawa, #information_free, footer .inner {
  background-color: rgba(255,255,255,0.8);
}
#information_free li {
  margin: 0;
}
#information_free .bd_b {
  border-bottom: none;
}
footer {
  width: 740px;
  max-width: 100%;
  margin: 0 auto;
}
@media (max-width: 1040px) {
  #kv {
    width: 100vw;
    margin-left: calc((100vw - 100%) / 2 * -1);
  }
}
@media (max-width: 640px) {
  #yodogawa, #information_free {
    width: 100%;
    padding: 0 10%;
  }
  #yodogawa {
    padding-top: 2em;
  }
  footer .inner {
    padding-top: 1em;
  }
}