.crs-wrap {
  position: relative;
  box-sizing: border-box;
}
.crs-wrap * {
  box-sizing: border-box;
}
.crs-screen {
  width: 100%;
  height: 100%;
  position: relative;
  overflow: hidden;
}
.crs-screen-roll {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  display: flex;
  flex-wrap: wrap;
  transition: left 0.5s;
}
.crs-screen-item {
  width: 100%;
  height: 100%;
  background-position: center;
  background-size: cover;
}
.crs-screen-item-content {
  width: 100%;
  height: calc(100% - 50px);
  font-family: arial;
  padding: 50px;
}
.crs-bar {
  width: 100%;
  height: 50px;
  position: absolute;
  bottom: 0;
  left: 0;
  padding: 10px;
}
.crs-bar-roll-current {
  width: 68px;
  height: 38px;
  border-radius: 12px;
  border: 2px solid white;
  position: absolute;
  z-index: 1;
  left: 0;
  right: 0;
  margin: auto;
  top: 5px;
}
.crs-bar-roll-wrap {
  height: 30px;
  overflow: hidden;
  border-radius: 8px;
  position: relative;
}
.crs-bar-roll {
  height: 30px;
  display: inline-flex;
  flex-wrap: wrap;
  position: absolute;
  left: 0;
  transition: left 0.2s;
}
.crs-bar-roll-item {
  width: 60px;
  height: 30px;
  border-radius: 8px;
  background-color: #fff;
  background-size: cover;
  background-position: center;
  opacity: 0.85;
  cursor: pointer;
}
.crs-bar-roll-item:not(:last-child) {
  margin-right: 10px;
}