#menu ul li a[target="_blank"] {
  position: relative;
}
#menu ul li a[target="_blank"]::before {
  content: "";
  display: block;
  background: url(../images/ico_external.png) no-repeat center center / contain;
  width: 12px;
  height: 10px;
  position: absolute;
  top: 20px;
  right: 0;
}
#footer .f_body .nav li a[target="_blank"] {
  position: relative;
}
#footer .f_body .nav li a[target="_blank"]::before {
  content: "";
  display: block;
  background: url(../images/ico_external.png) no-repeat center center / contain;
  width: 9.6px;
  height: 8px;
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  margin-top: -2px;
}