ul,li{
  list-style: none;
}
.h-full{
  height: 100%;
}
.w-full{
  width: 100%;
}
.relative{
  position: relative;
}
.absolute{
  position: absolute;
}
.transition {
  max-height: 0;               
  overflow: hidden;            
  transition: all 0.4s ease-in-out; 
}
.red{
  color: red;
}
.bolder{
  font-weight: bolder;
}
.flex{
  display: flex;
}
.justify-between{ 
  justify-content: space-between;
}
.items-center{ 
  align-items: center;
}
.none{ 
  display: none;
}
.block{ 
  display: block;
}
.text-1{
  font-size: 1rem;
}
.text-2{ 
  font-size: 1.2rem;
}
.text-3{
  font-size: 1.5rem;
}
.text-4{
  font-size: 1.7rem;
}
.text-5{ 
  font-size: 2rem;
}
.text-6{ 
  font-size: 2.5rem;
}
.text-7{ 
  font-size: 3rem;
}
.text-8{ 
  font-size: 3.5rem;
}
.text-9{ 
  font-size: 4rem;
}
.text-bold{
  font-weight: bold;
}
.mb-1{
  margin-bottom: 5px;
}
.mb-2{ 
  margin-bottom: 10px;
}
.mb-3{
  margin-bottom: 15px;
}
.mb-4{ 
  margin-bottom: 20px;
}
.mt-1{
  margin-top: 5px;
}
.mt-2{ 
  margin-top: 10px;
}
.mt-3{ 
  margin-top: 15px;
}
.mt-4{ 
  margin-top: 20px;
}
.pointer{
  cursor: pointer;
}
.flex-1{
  flex: 1;
}
.nowrap{
  flex-wrap: nowrap;
  white-space: nowrap;
}
@media (min-width: 992px) {
  .col-md-5ths {
    position: relative;
    min-height: 1px;
    padding-right: 15px; /* 保持与 Bootstrap 一致的 gutter */
    padding-left: 15px;
    float: left;
    width: 20%;          /* 5 等分 */
    box-sizing: border-box; /* 防止 padding 导致换行 */
  }
}