.banner_list {
  display: -webkit-box;
  display: -moz-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: start;
     -moz-box-align: start;
      -ms-flex-align: start;
          align-items: flex-start;
}

.banner_list li {
  margin-bottom: 10px;
}

.banner_list a {
  display: block;
  will-change: opacity;
  -webkit-transition: opacity .2s ease-out;
  -moz-transition: opacity .2s ease-out;
  transition: opacity .2s ease-out;
}

.banner_list a:hover {
  cursor: pointer;
  opacity: .7;
}

.banner_list.main-banner {
  -ms-flex-wrap: wrap;
      flex-wrap: wrap;
}

.banner_list.main-banner li:nth-child(2n-1) {
  margin-right: 10px;
}

.banner_list.sub-banner {
  -webkit-box-pack: justify;
     -moz-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}