style.css

* {
  margin: 0;
  padding: 0;
  background: none;
  border: 0;
  outline: 0;
}
html,
body {
  height: 100%;
  font-size: 14px;
}
body {
  background-color: #2b2b2b;
  color: #efefef;
  font-family: Arial, "Microsoft YaHei";
}
#main {
  display: flex;
  align-items: flex-start;
  min-height: 100%;
}
#search {
  flex: 0 0 20%;
  align-self: stretch;
}
#search > div {
  position: fixed;
  flex-flow: column nowrap;
  justify-content: space-between;
  display: flex;
  padding: 20% 1rem 0 1rem;
  box-sizing: border-box;
  width: 20%;
  height: 100%;
}
#searchBox {
  box-sizing: border-box;
  height: 4rem;
  line-height: 4rem;
  width: 100%;
  padding: 0 2em;
  color: inherit;
  font-size: 1.2rem;
  background: url(img/search.png) no-repeat right center #3f3f3f;
  border-radius: 30px;
}
#searchBox:focus {
  background: #444;
}
#search p {
  padding: 2rem 0;
  color: #666;
  font-size: 0.6rem;
}
#search a {
  color: #2fb388;
}
#searchItem {
  margin-top: 20vh;
  margin-right: 2rem;
  list-style-type: none;
}
#searchItem li {
  margin: 0.3rem;
  width: 3rem;
  height: 3rem;
  border-radius: 2rem;
  overflow: hidden;
  box-shadow: 0 2px 2px 2px #111;
  cursor: pointer;
}
#searchItem li img {
  width: 100%;
}
#content {
  margin-top: 18vh;
}
#content > div {
  display: flex;
  flex-flow: row wrap;
}
.item {
  margin: 0 1rem;
  overflow: hidden;
}
.wrap {
  padding: 1rem 0;
  text-align: center;
}
.wrap h2 {
  font-weight: normal;
  color: #2fb388;
  font-size: 1.3rem;
  line-height: 2rem;
}
.recommend img {
  margin: 0.5rem 0;
  width: 5rem;
  height: 5rem;
  border-radius: 3rem;
  box-shadow: 0 4px 4px 4px #222;
}
.recommend p {
  line-height: 2rem;
}
.wrap ul {
  margin: 1rem 0;
  list-style-type: none;
  text-align: left;
  color: #c0c0c0;
}
.wrap li {
  padding: 0.3rem 1rem;
}
.wrap li:hover {
  background: #2ba07b;
}
.wrap li img {
  margin-right: 0.3rem;
  width: 2rem;
  height: 2rem;
  border-radius: 2rem;
  box-shadow: 0 2px 2px 2px #111;
  vertical-align: middle;
}
.wrap .test {
  position: relative;
}
.wrap .test:after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  display: block;
  height: 100%;
  background: linear-gradient(
    to bottom,
    rgba(43, 43, 43, 0.5),
    rgba(43, 43, 43, 1)
  );
}
.item.change {
  overflow: visible;
}
.item.change .wrap {
  position: relative;
  box-shadow: 0 2px 5px 2px #111;
  background: #2b2b2b;
  z-index: 1;
}
.item.change .test:after {
  background: none;
}