.slider {
  position: sticky;
  max-width: 1000px;
  overflow: hidden;
  width: 100%;
  margin: 20px 0;
}

.slider .placeholder {
  width: 500px;
  visibility: hidden;
  font-size: 0px;
}

.slider .placeholder img {
  width: 100%;
}

.slider .slide-item {
  position: absolute;
  display: inline-block;
  width: 500px;
  font-size: 0px;
  left: 50%;
  top: 0px;
  transition: all 0.4s ease-out;
  transform: translate(-50%, 5%) scale(0.9, 0.9);
  opacity: 0;
  z-index: 1;
}

.slider .current.slide-item {
  z-index: 6;
  transform: translate(-50%, 0) scale(1, 1);
  opacity: 1;
}

.slider .last.slide-item {
  opacity: 1;
  left: 0px;
  transform: translate(-5%, 5%) scale(0.9, 0.9);
  z-index: 4;
}

.slider .next.slide-item {
  opacity: 1;
  left: 100%;
  transform: translate(-95%, 5%) scale(0.9, 0.9);
  z-index: 3;
}

.slider .last.slide-item:hover, .slider .next.slide-item:hover {
  opacity: 0.8;
}

.slider .slide-item img {
  width: 100%;
}

.slider ul.slide-btns {
  z-index: 10;
  position: absolute;
  margin: auto;
  bottom: 0px;
  left: 0px;
  right: 0px;
  display: flex;
  justify-content: center;
  padding: 0;
  list-style: none;
}

.slider ul.slide-btns li {
  transition: all 0.5s;
  transition-property: background-color;
  background-color: #C8C8C8;
  background-clip: content-box;
  flex: 0 0 16px;
  height: 2px;
  margin-right: 10px;
  display: inline-block;
  border-bottom: 10px transparent solid;
}

.slider ul.slide-btns li.select, .slider ul.slide-btns li:hover {
  background-color: #C62F2F;
}

.slider .left-btn, .slider .right-btn {
  height: 90%;
  width: 35px;
  z-index: 7;
  position: absolute;
  bottom: 0px;
  text-align: center;
  transition: all 0.3s;
}

.slider .left-btn:active, .slider .right-btn:active {
  background: rgba(0, 0, 0, 0.3);
}

.slider .left-btn i, .slider .right-btn i {
  display: block;
  color: white;
  opacity: 0;
  font-size: 30px;
  position: relative;
  top: 50%;
  transform: translateY(-50%);
  transition: all 0.3s;
}

.slider:hover .left-btn i, .slider:hover .right-btn i {
  opacity: 0.5;
}

.slider .left-btn:hover i, .slider .right-btn:hover i {
  opacity: 1;
}

.slider .left-btn {
  left: 0px;
}

.slider .right-btn {
  right: 0px;
}