item { display: inline-block; width: 100px; text-align: center; cursor: pointer } .item a { color: #e5ff10; } .item:hover { background-color: #45ff35; }

这是一个 CSS 样式，用于设置一组元素的样式。其中，`.item` 是一个类选择器，表示选中所有 class 属性为 item 的元素，`display: inline-block` 表示将元素设置为行内块元素，`width: 100px` 表示设置元素的宽度为 100 像素，`text-align: center` 表示设置文本居中对齐，`cursor: pointer` 表示将鼠标指针设置为手型。而 `.item a` 表示选中所有 class 属性为 item 的元素内的 a 标签元素，`color: #e5ff10` 表示设置文本颜色为浅黄色。最后，`.item:hover` 表示当鼠标悬停在 class 属性为 item 的元素上时，应用背景色为亮绿色。

相关问题

优化下面代码.bg { width: 100%; height: 100vh; background-image: url('../../assets/img/info-bg.png'); background-size: 100% 100%; background-repeat: no-repeat; position: relative; font-family: AlibabaPuHuiTiR; .goBack { position: absolute; top: 34px; right: 65px; cursor: pointer; color: #ffffff; width: 181px; padding: 15px 10px; background: rgba(24, 31, 30, 0.52); border: 1px solid #4a524e; border-radius: 5px; font-size: 18px; font-family: AlibabaPuHuiTiR; z-index: 111; display: flex; flex-direction: row; justify-content: space-between; align-items: center; } .home-left { position: absolute; top: 18%; left: 40px; width: 41%; height: 76%; font-size: 24px; color: #ffffff; } .unit { font-size: 24px; color: #636363; } .home-left-title { font-size: 24px; color: #ffffff; line-height: 36px; } .home-right { position: absolute; top: 18%; right: 88px; width: 46%; height: 78%; } .model { display: flex; justify-content: center; align-items: center; height: 90%; } #threeContained { width: 100%; height: 100%; } .model-qk-img { width: 82%; height: 90%; background-image: url('../../assets/img/howo.png'); background-size: 100% 100%; background-repeat: no-repeat; } .model-zk-img { width: 56%; height: 90%; background-image: url('../../assets/img/heavyT.png'); background-size: 100% 100%; background-repeat: no-repeat; } .model-gj-img { width: 82%; height: 90%; background-image: url('../../assets/img/transit.png'); background-size: 100% 100%; background-repeat: no-repeat; } .car-online { margin-bottom: 50px; } } .day-data { display: flex; flex-direction: row; justify-content: space-between; align-items: center; height: 29%; margin-left: 30px; } .day-val { width: 40%; } .prefix { display: inline-block; width: 6px; height: 14px; background: #ffffff; margin-right: 20px; } .zh-title { margin-left: 30px; padding-top: 30px; font-size: 30px; font-weight: 700; text-align: left; color: #ffffff; line-height: 32px; letter-spacing: 0.3px; font-family: AlibabaPuHuiTiB; } .en-title { margin-left: 30px; font-size: 14px; font-weight: 400; text-align: left; color: #ffffff; line-height: 32px; letter-spacing: -0.91px; font-family: AlibabaPuHuiTiR; }

Here are some suggestions to optimize the code:

1. Use shorthand properties whenever possible. For example, instead of writing `background-size: 100% 100%;`, you can write `background-size: cover;`.

2. Consolidate similar styles into classes, instead of repeating them for every element. For example, you can create a class for the font family and apply it to all elements that use that font.

3. Remove unnecessary styles that are not being used or overwritten by other styles.

4. Use more specific selectors to target elements, instead of relying on the order of elements in the HTML. This will make the code more robust and easier to maintain.

5. Consider using a CSS preprocessor like Sass or Less, which can help you write cleaner and more organized code.

Here's an example of how the code could be optimized:

.bg {
  width: 100%;
  height: 100vh;
  background: url('../../assets/img/info-bg.png') no-repeat center center / cover;
  position: relative;
  font-family: AlibabaPuHuiTiR;
}

.goBack {
  position: absolute;
  top: 34px;
  right: 65px;
  cursor: pointer;
  color: #fff;
  width: 181px;
  padding: 15px 10px;
  background: rgba(24, 31, 30, 0.52);
  border: 1px solid #4a524e;
  border-radius: 5px;
  font-size: 18px;
  font-family: AlibabaPuHuiTiR;
  z-index: 111;
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
}

.home-left {
  position: absolute;
  top: 18%;
  left: 40px;
  width: 41%;
  height: 76%;
  font-size: 24px;
  color: #fff;
}

.unit {
  font-size: 24px;
  color: #636363;
}

.home-left-title {
  font-size: 24px;
  color: #fff;
  line-height: 36px;
}

.home-right {
  position: absolute;
  top: 18%;
  right: 88px;
  width: 46%;
  height: 78%;
}

.model {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 90%;
}

#threeContained {
  width: 100%;
  height: 100%;
}

.model-qk-img {
  width: 82%;
  height: 90%;
  background: url('../../assets/img/howo.png') no-repeat center center / cover;
}

.model-zk-img {
  width: 56%;
  height: 90%;
  background: url('../../assets/img/heavyT.png') no-repeat center center / cover;
}

.model-gj-img {
  width: 82%;
  height: 90%;
  background: url('../../assets/img/transit.png') no-repeat center center / cover;
}

.car-online {
  margin-bottom: 50px;
}

.day-data {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 29%;
  margin-left: 30px;
}

.day-val {
  width: 40%;
}

.prefix {
  display: inline-block;
  width: 6px;
  height: 14px;
  background: #fff;
  margin-right: 20px;
}

.zh-title {
  margin-left: 30px;
  padding-top: 30px;
  font-size: 30px;
  font-weight: 700;
  text-align: left;
  color: #fff;
  line-height: 32px;
  letter-spacing: 0.3px;
  font-family: AlibabaPuHuiTiB;
}

.en-title {
  margin-left: 30px;
  font-size: 14px;
  font-weight: 400;
  text-align: left;
  color: #fff;
  line-height: 32px;
  letter-spacing: -0.91px;
  font-family: AlibabaPuHuiTiR;
}

.font-alibaba {
  font-family: AlibabaPuHuiTiR;
}

.font-alibaba-bold {
  font-family: AlibabaPuHuiTiB;
}

*{ margin: 0; padding: 0; } html,body{ height: 100%; } body{ width: 100%; background-image:radial-gradient(#22002a,#01001f) } a{ text-decoration: none; } #movie_info{ width: 990px; margin: 0 auto; padding-bottom: 60px; box-sizing: border-box; } #movie_info .info{ width: 100%; padding-bottom: 15px; border-bottom: 1px dotted rgb(255,255,255,0.3); } #movie_info .info img{ float: left; box-shadow: 0 0 6px #C4C4C4; margin-top: 36px; } table{ margin-top: 20px; margin-right: 10px; float: right; color: white; font-size: 13px; } table,tr,td,th{ border: none; } th{ font-size: 22px; text-align: left; height: 38px; line-height: 38px; color: #fdfed2; } td{ width: 240px; line-height: 24px; } table a{ display: block; width: 100px; height: 30px; line-height: 30px; border-radius: 5px; color: #FFFFFF; text-align: center; margin-top: 15px; } table .lookInfo{ background-image:linear-gradient(#9ac534,#427e22) ; } table .buy{ background-image:linear-gradient(#ff8b45,#ff5200) ; } table .score{ color: #f2a32e; } table .score .star{ margin-left: 15px; display: inline-block; width: 103px; height: 20px; background: url(../images/star_big.png) left -80px no-repeat; } table .score em{ font-size: 28px; color: #f2a32e; } #movie_info .info:after,#movie_info ul:after{ content: ""; display: block; clear: both; } /*猜你喜欢*/ #movie_info .like{ position: relative; } #movie_info .like span{ position: absolute; top: 10px; left: 25px; display: block; width: 100px; height: 30px; line-height: 30px; border-radius: 2px; background:rgb(220,216,216, 32%); color: #FFFFFF; text-align: center; font-size: 12px; } #movie_info .like ul{ width: 990px; height: 190px; position: absolute; top: 50px; left: 25px; overflow: hidden; } #movie_info .like ul:after{ content: ""; display: block; clear: both; } #movie_info .like li{ width: 119px; text-align: center; float: left; margin-right: 20px; font-size: 12px; color: #e1ab5b; line-height: 20px; cursor: pointer; } #movie_info .like li img{ width: 119px; height: 168px; }。每行代码加上注释

/* 设置页面样式 */
*{
margin: 0;
padding: 0;
}
html,body{
height: 100%;
}
body{
width: 100%;
background-image: radial-gradient(#22002a,#01001f); /* 设置背景颜色 */
}
a{
text-decoration: none;
}

/* 电影信息区域 */
#movie_info{
width: 990px;
margin: 0 auto;
padding-bottom: 60px;
box-sizing: border-box;
}

#movie_info .info{
width: 100%;
padding-bottom: 15px;
border-bottom: 1px dotted rgb(255,255,255,0.3); /* 设置下划线样式 */
}

#movie_info .info img{
float: left;
box-shadow: 0 0 6px #C4C4C4; /* 设置图片阴影 */
margin-top: 36px;
}

table{
margin-top: 20px;
margin-right: 10px;
float: right;
color: white;
font-size: 13px;
}

table,tr,td,th{
border: none;
}

th{
font-size: 22px;
text-align: left;
height: 38px;
line-height: 38px;
color: #fdfed2;
}

td{
width: 240px;
line-height: 24px;
}

table a{
display: block;
width: 100px;
height: 30px;
line-height: 30px;
border-radius: 5px;
color: #FFFFFF;
text-align: center;
margin-top: 15px;
}

table .lookInfo{
background-image:linear-gradient(#9ac534,#427e22); /* 设置按钮渐变背景颜色 */
}

table .buy{
background-image:linear-gradient(#ff8b45,#ff5200);
}

table .score{
color: #f2a32e;
}

table .score .star{
margin-left: 15px;
display: inline-block;
width: 103px;
height: 20px;
background: url(../images/star_big.png) left -80px no-repeat; /* 设置星星图标 */
}

table .score em{
font-size: 28px;
color: #f2a32e;
}

#movie_info .info:after,#movie_info ul:after{
content: "";
display: block;
clear: both;
}

/* 猜你喜欢区域 */
#movie_info .like{
position: relative;
}

#movie_info .like span{
position: absolute;
top: 10px;
left: 25px;
display: block;
width: 100px;
height: 30px;
line-height: 30px;
border-radius: 2px;
background:rgb(220,216,216, 32%);
color: #FFFFFF;
text-align: center;
font-size: 12px;
}

#movie_info .like ul{
width: 990px;
height: 190px;
position: absolute;
top: 50px;
left: 25px;
overflow: hidden;
}

#movie_info .like ul:after{
content: "";
display: block;
clear: both;
}

#movie_info .like li{
width: 119px;
text-align: center;
float: left;
margin-right: 20px;
font-size: 12px;
color: #e1ab5b;
line-height: 20px;
cursor: pointer;
}

#movie_info .like li img{
width: 119px;
height: 168px;
}