应该怎么改啊
来源：3-9 作业题
慕仙0201785
2018-12-21 08:11:05
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* {
margin: 0;
padding: 0;
}
a {
text-decoration: none;
color: #ffffff;
}
.header {
height: 60px;
background-color: #000000;
}
.header .logo {
width: 132px;
height: 42px;
background: url(../img/logo.png) no-repeat;
float: left;
margin-top: 10px;
margin-left: 22px;
}
.header .nav {
margin-left: 20px;
height: 100%;
float: left;
}
.header .nav__item {
display: block;
line-height: 60px;
float: left;
padding: 0 25px;
color: #ffffff;
font-size: 20px;
}
.header .nav__item:hover {
background-color: #363c41;
}
.header .nav__item:nth-child(2) {
background-color: #363c41;
}
.header .search {
float: right;
padding-right: 25px;
position: relative;
margin: 12px 25px;
height: 36px;
}
.header .search__input {
width: 270px;
border: none;
outline: none;
background-color: #000;
border-bottom: 1px solid #2b333b;
line-height: 36px;
}
.header .search::before {
content: "前段入门";
display: block;
width: 74px;
text-align: center;
position: absolute;
left: 0px;
top: 0px;
background-color: #2b333b;
color: #5c646b;
line-height: 32px;
font-size: 14px;
}
.header .search__submit {
display: block;
position: absolute;
right: 25px;
top: 4px;
background-position: 0 0;
width: 22px;
height: 22px;
background-image: url(../img/icon-1-sprite_w22.png);
}
.header .profile {
float: right;
}
.header .profile__item {
display: block;
position: relative;
float: left;
width: 60px;
height: 60px;
margin-right: 1px;
}
.header .profile__item:hover {
background-color: #363c41;
}
.header .profile__shopping:before {
content: ' ';
display: block;
position: absolute;
left: 19px;
top: 19px;
width: 22px;
height: 22px;
background-position: 0 -210px;
background-image: url(../img/shopcar.png);
}
.header .profile__message:before {
content: ' ';
display: block;
position: absolute;
left: 19px;
top: 19px;
width: 22px;
height: 22px;
background-position: 0 -44px;
background-image: url(../img/icon-1-sprite_w22.png);
}
.header .profile__ava {
width: 36px;
height: 36px;
background-color: #ffffff;
border-radius: 50%;
background-image: url(../img/ava.jpg);
background-size: cover;
margin: 13px 30px 0;
}
.banner-image {
width: 100%;
height: 560px;
}
.recommend {
width: 1200px;
margin: 0 auto;
position: relative;
height: 650px;
top: -120px;
}
.recommend:after {
content: ' ';
display: block;
font-size: 0px;
line-height: 0px;
clear: both;
zoom: 1;
}
.recommend .recommend-course {
width: 297px;
height: 310px;
float: left;
margin: 0 20px 30px 0;
box-shadow: 0 4px 8px rgba(7, 17, 27, 0.2);
position: relative;
background-color: #ffffff;
}
.recommend .recommend-course:before {
content: '';
display: block;
width: 98%;
height: 3px;
left: 1%;
bottom: -5px;
position: absolute;
box-shadow: 0 8px 16px rgba(7, 17, 27, 0.2);
border-radius: 4px;
background-color: #ffffff;
}
.recommend .recommend-course:after {
content: '';
display: block;
width: 98%;
height: 3px;
left: 1%;
bottom: -11px;
position: absolute;
box-shadow: 0 8px 16px rgba(7, 17, 27, 0.2);
border-radius: 4px;
background-color: #ffffff;
}
.recommend .recommend-course:nth-child(5n) {
margin-right: 0;
}
.recommend .recommend-course__cover {
height: 110px;
overflow: hidden;
}
.recommend .recommend-course__cover img {
width: 100%;
}
.footer {
height: 100px;
background-color: #000000;
}
.footer .footer-link {
width: 900px;
line-height: 12px;
padding: 30px 0 16px 40px;
}
.footer .footer-link__item {
display: inline-block;
margin-right: 30px;
color: #959aa0;
float: left;
font-size: 16px;
}
.footer .footer-link__item:hover {
color: #ffffff;
}
.footer .footer-copy {
width: 900px;
padding: 15px 0 0 40px;
line-height: 12px;
color: #959aa0;
font-size: 12px;
}
.footer .footer-share {
position: relative;
float: right;
top: -45px;
width: 150px;
height: 32px;
padding-right: 300px;
}
.footer .footer-share__item {
display: inline-block;
padding-left: 13px;
float: left;
width: 36px;
height: 36px;
background-image: url(../img/footer-sprite.png);
}
.footer .footer-share__item_i_1 {
background-position: 0 -275px;
}
.footer .footer-share__item_i_2 {
background-position: 0 -320px;
}
.footer .footer-share__item_i_3 {
background-position: 0 -360px;
}写回答
1回答
-
代码中的问题：
1、底部位置不对，显示在了recommend区域下面，是因为给recommend区域设置了固定高度，而内容超出了设置了高度。建议将recommend高度去掉，调整宽度，一行四列显示，参考：
设置居中显示是为了让最后一个盒子居中显示。
2、给每一个块设置相同的margin值即可，这样就不需要调整了：
recommend中设置居中显示之后，子元素中的内容也会居中显示，正常应该是左对齐显示的，所以添加text-align:left；
3、将最后的一个元素浮动取消，设置为行内块元素，居中显示：
自己按照上述调整之后，可以再完善下内容部分的代码。
祝学习愉快！
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