#nav_global {
  position: static;
  background: url(../images/contents/contents_nav_bg.png);
}

#contents_wrap {
  padding: 0px 10px 100px;
}

@media screen and (max-width: 1200px) {
  #nav_global {
    position: relative;
    z-index: 9999;
  }
}

@media screen and (max-width: 640px) {
  #contents_wrap {
    margin-top: -10px;
  }
}