.back{
  background-image: url("../soza/note.png");
  background-size: 100% 100%;
  background-position: top center;
  background-attachment: fixed;
  background-repeat: no-repeat;
  margin: 0;
  padding-top: 140px; /* バーの高さ分余白 */
  font-family: sans-serif;
}

.padding{
  padding:0px 340px 60px 360px;
}