HTML和CSS实现京东首页（html和css详解）（三）

/*
* @Author: apple
* @Date:   2017-07-26 23:27:21
* @Last Modified by:   apple
* @Last Modified time: 2017-07-27 14:30:23
*/
/* 中间分类模块开始 */
.grid {
  height: 480px;
}
.grid-col1 {
  width: 190px;
  height: 100%;
  background-color: #6e6568;
  color: #fff;
  font-size: 14px;  /* 不是给字的，给 /  */
  position: relative;
}
.ad {
  width: 250px;
  height: 480px;
/*  background-color: pink;
 */ position: absolute;
  top: 0;
  left: -250px;
}
.ad-r {
  position: absolute;
  top: 0;
  left: 250px;
  z-index: 999;
  width: 0;
  height: 480px;
  background: url(../images/ad-r.jpg);
  /* z这个盒子做动画，所以给它添加过渡 */
  transition: all 0.8s;
}
.ad:hover .ad-r {  
  /* 鼠标经过 ad 这个广告大盒子的时候， 里面的这个叫 ad-r的盒子的宽度由0变为 990 */
  width: 990px;
}
.grid-col1 a {
  color: #fff;
  font-size: 14px;  /* 是给链接文字  */
  margin: 0 3px;
}
.grid-col1 a:hover {
  color: #f10215;
}
.grid-col1 ul {
  padding: 10px 0;
}
.grid-col1 ul li {
  padding-left: 12px;
  height: 29px;
  line-height: 26px;
  /* margin-left: 12px; 同学们体会下 这里为什么不用 margin  就是因为下面有鼠标经过的效果*/
}
.grid-col1 ul li:hover {
  background-color: #9c9698;
}
.grid-col2 {
  width: 790px;
  height: 100%;
  margin-left: 10px;
}
/* banner部分 */
.grid-col2-b div {
  float: left;
  margin-top: 10px;
}
.grid-col2-b div:last-child {
  float: right;
  margin-top: 10px;
}
/* 箭头部分 */
.grid-col2-t {
  position: relative;
}
.arrow-l,
.arrow-r {
  position: absolute;
  top: 50%;
  width: 30px;
  height: 60px;
  background: rgba(0, 0, 0, 0.3);
  transform: translateY(-50%);
  text-align: center;
  line-height: 60px;
  font-size: 20px;
  color: rgba(255, 255, 255, .6);
  font-family: arial;
  font-weight: normal;
}
.arrow-r {
  right: 0;
}
.circle {
  width: 167px;
  height: 20px;
  background: rgba(255, 255, 255, .3);
  position: absolute;
  left: 50%;
  bottom: 20px;
  transform: translateX(-50%);
    border-radius: 10px;
    padding-left: 8px;
}
.circle li {
  width: 12px;
  height: 12px;
  background-color: #fff;
  border-radius: 50%;
  float: left;
  margin: 4px;
  cursor: pointer;  /* 鼠标经过li 的时候变成小手 */
}
.circle .current {
  background-color: #f10215;
}
.grid-col3 {
  width: 190px;
  height: 100%;
}
/* 右边模块 */
.login {
  height: 85px;
  border-bottom: 1px solid #ccc;
  background-color: #fff;
  padding: 15px;
}
.login-t {
  width: 95px;
  height: 60px;
  line-height: 20px;
  font-size: 12px;
  white-space: nowrap;  /* 强制一行内显示 */
  overflow: hidden;  /* 溢出隐藏 */
  text-overflow: ellipsis; /* 超出的部分显示 省略号 */
  color: #666;
  padding-left: 60px;  /* 这里给padding 把文字挤过来 */
  position: relative;
}
.login-t a {
  color: #666;
}
.login-t a:hover {
  color: #f10512;
}
.user-info {
  width: 50px;
  height: 50px;
  position: absolute;
  left: 0;
  top: 0;
  background: url(../images/sprite_userinfo@1x.png) no-repeat -70px 0;
}
.login-b a {
  display: inline-block;
  width: 70px;
  height: 20px;
  line-height: 20px;
  border: 2px solid #f10215;
  margin-right: 3px;
  text-align: center;
  color: #f10215;
}
.login-b a:hover {
  background-color:  #f10215;
  color: #fff;
}
.user-info img {
  width: 40px;
  border-radius: 50%;
  margin: 5px;
}
.news {
  height: 154px;
  border-bottom: 1px solid #ccc;
  background-color: #fff;
  padding: 7px 13px 0;
  box-sizing: border-box;
}
.news-t {
  height: 19px;
  border-bottom: 1px solid #ccc;
  position: relative;
}
.news-t a {
  float: left;
  height: 17px;
  line-height: 17px;
}
.cuxiao {
  width: 38px;
  border-right: 1px solid #ccc;
}
.gg {
  margin-left: 15px;
}
.news-t .more {
  float: right;
}
.news-t div {
  height: 2px;
  width: 28px;
  background-color: #f10215;
  position: absolute;
  bottom: -1px;
  left: 0;
}
.news-b {
  padding-top: 15px ;
}
.news-b li {
  height: 23px;
  line-height: 23px;
}
.expand {
  height: 209px;
  background-color: #fff;
  overflow: hidden; /* expand 这个宽度继承了 父亲 190宽度 */
}
.expand ul {
  width: 195px; /*  父亲是 190 但是里面的li 宽度超过了190 摆放不开 4个li 此时 让ul 宽度变大 */ 
}
.expand  li {
  width: 47px;
  height: 69px;
  border-right: 1px solid #ccc;
  border-bottom: 1px solid #ccc;
  float: left;
}
.expand  li a {
  display: block;
  padding-top: 15px;
  text-align: center;
}
.expand  li i {
  display: block;
  margin: 0 auto;
  margin-bottom: 10px;
  background: url(../images/sprite_fs@1x.png) no-repeat;
  width: 18px;
  height: 23px;
  background-position: -5px -88px;
}
.expand  li:first-child i {
  width: 18px;
  height: 23px;
  background-position: -5px -88px;
}