.c5-tips__lineBox1--Red {
  padding: 10px;
  border:#c93434 solid 3px;
  max-width: 100%;
}
.c5-tips__lineBox2--black {
  padding-left: 10px;
  border:#000 solid 1px;
  max-width: 600px;
}
.c5-tips__lineBox3--black {
  padding-left: 10px;
  border:#000 solid 1px;
  max-width: 900px;
}
@media screen and (max-width: 767px) {
  .c5-tips__lineBox1--black,
  .c5-tips__lineBox2--black,
  .c5-tips__lineBox3--black{
     max-width: 600px;
  }
}