分割线预设

hr,
.hr-xs-Silver,
.hr-sm-black,
.hr-sm-Silver,
.hr-xs-gray,
.hr-sm-gray {
  margin: 20px 0;
}
hr {
  border: none;
  border-top: 1px solid #000;
}
.hr-xs-Silver {
  border: none;
  border-top: 1px solid #c0c0c0;
}
.hr-sm-black {
  border: none;
  border-top: 2px solid #000;
}
.hr-sm-Silver {
  border: none;
  border-top: 2px solid #c0c0c0;
}
.hr-xs-gray {
  border: none;
  border-top: 1px solid #767676;
}
.hr-sm-gray {
  border: none;
  border-top: 2px solid #767676;
}