目录
CSS从入门到精通-文本与字体样式
第1关 字体颜色、类型与大小
第2关 字体粗细与风格
第3关 文本装饰与文本布局
CSS从入门到精通-背景样式
第1关 背景颜色
第2关 背景图片
第3关 背景定位与背景关联
CSS从入门到精通-基础选择器
第1关 CSS 元素选择器
第2关 CSS 类选择器
第3关 CSS id选择器
使用HTML/CSS实现Educoder顶部导航栏
第1关 使用flex布局实现Educoder顶部导航栏容器布局
第2关 实现左侧文字导航列表
第3关 实现右侧功能图标排序
第4关 实现左侧鼠标悬停效果与选中状态
CSS从入门到精通-文本与字体样式
第1关 字体颜色、类型与大小
body {
/*背景渐变*/
background: -webkit-linear-gradient(left, #7ECABA, #E2FCCB);
/* Safari 5.1 - 6.0 */
background: -o-linear-gradient(right, #7ECABA, #E2FCCB);
/* Opera 11.1 - 12.0 */
background: -moz-linear-gradient(right, #7ECABA, #E2FCCB);
/* Firefox 3.6 - 15 */
background: linear-gradient(to right, #7ECABA, #E2FCCB);
/* 标准的语法 */
font: 100% PingFang SC, Verdana, Helvetica Neue, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
/*居中页面*/
width: 45em;
margin: 0 auto;
}
h1,
h2 {
/* ********** BEGIN ***********/
font-family: PingFang SC, Verdana, Helvetica Neue, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
/* ********** END ***********/
}
h1 {
/* ********** BEGIN ***********/
font-size: 2.1875em;
/* ********** END ************/
}
h2 {
background-color: #eaebef;
/* ********** BEGIN ***********/
font-size: 1.75em;
color: #7d717c;
/* ********** END ************/
}
h3 {
background-color: white;
/* ********** BEGIN ***********/
font-size: 1.25em;
color: green;
/* ********** END ************/
padding-left: 10px;
}
hr {
height: 1px;
border: none;
border-top: 2px dashed #88b2d2;
}
footer {
margin: 10px auto;
}
/* CONTENT
----------------------------------- */
.architect {
background-color: #fff;
padding: 1.5em 1.75em;
}
/* :::: Intro ::::: */
.intro {
background-color: #888888;
/* ********** BEGIN ***********/
color: #fefefe;
/* ********** END ************/
padding: 1px 1.875em .7em;
}
.intro .subhead {
/* ********** BEGIN ***********/
font-size: 1.125em;
/* ********** END ************/
}
.intro p {
font-size: 1.0625em;
}
/* :::: chapter Descriptions ::::: */
.chapter p {
font-size: .9375em;
}
img {
border-radius: 8px;
}
/* :::: Links :::: */
a:link {
color: #e10000;
}
a:visited {
color: #b44f4f;
}
a:hover {
color: #f00;
}
.intro a {
color: #fdb09d;
}
.intro a:hover {
color: #fec4b6;
}
第2关 字体粗细与风格
body {
/*背景渐变*/
background: -webkit-linear-gradient(left, #7ECABA, #E2FCCB);
/* Safari 5.1 - 6.0 */
background: -o-linear-gradient(right, #7ECABA, #E2FCCB);
/* Opera 11.1 - 12.0 */
background: -moz-linear-gradient(right, #7ECABA, #E2FCCB);
/* Firefox 3.6 - 15 */
background: linear-gradient(to right, #7ECABA, #E2FCCB);
/* 标准的语法 */
font: 100% PingFang SC, Verdana, Helvetica Neue, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
/*居中页面*/
width: 45em;
margin: 0 auto;
}
h1,
h2 {
/* 设置h1, h2 的font-family*/
font-family: PingFang SC, Verdana, Helvetica Neue, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
/* ********** BEGIN ***********/
font-weight: normal;
/* ********** END ***********/
}
h1 {
/* 设置h1元素为 35px 的字体大小 */
font-size: 2.1875em;
/* 35px/16px */
}
h2 {
background-color: #eaebef;
/* 设置h2元素的字体颜色为:#7d717c */
color: #7d717c;
/* 使用em的方式设置h2元素为 28px 的字体大小 */
font-size: 1.75em;
/*28px/16px */
}
h3 {
background-color: white;
/* 使用em的方式设置h3元素为 20px 的字体大小 */
font-size: 1.25em;
/* 设置h3元素的字体颜色为:green */
color: green;
padding-left: 10px;
}
hr {
height: 1px;
border: none;
border-top: 2px dashed #88b2d2;
}
/* 子选择器 */
em,
a:link,
.intro .subhead {
font-weight: bold;
}
footer {
/* ********** BEGIN ***********/
font-weight: light;
font-style: italic;
/* ********** END ***********/
margin: 10px auto;
}
footer a {
font-style: normal;
}
/* CONTENT
----------------------------------- */
.architect {
background-color: #fff;
padding: 1.5em 1.75em;
}
/* :::: Intro ::::: */
.intro {
background-color: #888888;
/* 设置 .intro 类元素的字体颜色为 #fefefe */
color: #fefefe;
padding: 1px 1.875em .7em;
}
.intro .subhead {
/* 使用em的方式设置 `.intro .subhead ` (intro类下得subhead子类)为 18px 的字体大小。 */
font-size: 1.125em;
}
.intro p {
font-size: 1.0625em;
}
/* :::: chapter Descriptions ::::: */
.chapter p {
font-size: .9375em;
}
img {
border-radius: 8px;
}
/* :::: Links :::: */
a:link {
/* 设置 a:link 元素的字体颜色为 #b44f4f */
color: #e10000;
}
a:visited {
color: #b44f4f;
}
a:hover {
color: #f00;
}
.intro a {
color: #fdb09d;
}
.intro a:hover {
color: #fec4b6;
}
第3关 文本装饰与文本布局
body {
/*背景渐变*/
background: -webkit-linear-gradient(left, #7ECABA, #E2FCCB);
/* Safari 5.1 - 6.0 */
background: -o-linear-gradient(right, #7ECABA, #E2FCCB);
/* Opera 11.1 - 12.0 */
background: -moz-linear-gradient(right, #7ECABA, #E2FCCB);
/* Firefox 3.6 - 15 */
background: linear-gradient(to right, #7ECABA, #E2FCCB);
/* 标准的语法 */
font: 100% PingFang SC, Verdana, Helvetica Neue, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
/*居中页面*/
width: 45em;
margin: 0 auto;
}
h1,
h2 {
font-family: PingFang SC, Verdana, Helvetica Neue, Microsoft Yahei, Hiragino Sans GB, Microsoft Sans Serif, WenQuanYi Micro Hei, sans-serif;
font-weight: normal;
/*********** BEGIN ***********/
text-align: center;
/************ END ************/
}
h1 {
/* 设置h1元素为 35px 的字体大小 */
font-size: 2.1875em;
/* 35px/16px */
}
h2 {
background-color: #eaebef;
/* 设置h2元素的字体颜色为:#7d717c */
color: #7d717c;
/* 使用em的方式设置h2元素为 28px 的字体大小 */
font-size: 1.75em;
/*28px/16px */
}
h3 {
background-color: white;
/* 使用em的方式设置h3元素为 20px 的字体大小 */
font-size: 1.25em;
/* 设置h3元素的字体颜色为:green */
color: green;
padding-left: 10px;
/*********** BEGIN ***********/
text-align: left;
/************ END ************/
}
p {
text-align: justify;
}
hr {
height: 1px;
border: none;
border-top: 2px dashed #88b2d2;
}
/* 子选择器 */
em,
a:link,
.intro .subhead {
font-weight: bold;
}
footer {
font-weight: light;
font-style: italic;
/* ********** BEGIN ***********/
text-align: center;
/* ********** END ***********/
margin: 10px auto;
}
footer a {
font-style: normal;
}
/* CONTENT
----------------------------------- */
.architect {
background-color: #fff;
padding: 1.5em 1.75em;
}
/* :::: Intro ::::: */
.intro {
background-color: #888888;
/* 设置 .intro 类元素的字体颜色为 #fefefe */
color: #fefefe;
padding: 1px 1.875em .7em;
}
.intro .subhead {
/* 使用em的方式设置 `.intro .subhead ` (intro类下得subhead子类)为 18px 的字体大小。 */
font-size: 1.125em;
text-align: center;
}
.intro p {
font-size: 1.0625em;
}
/* :::: chapter Descriptions ::::: */
.chapter p {
font-size: .9375em;
}
.photos {
/*********** BEGIN ***********/
text-align: center;
/*********** END *************/
}
img {
border-radius: 8px;
}
/* :::: Links :::: */
/* 默认显示样式 */
a:link {
color: #e10000;
/*********** BEGIN ***********/
text-decoration: none;
/*********** END *************/
}
a:visited {
color: #b44f4f;
}
/* 鼠标放在上面的显示样式 */
a:hover {
color: #f00;
/*********** BEGIN ***********/
text-decoration: underline;
/*********** END *************/
}
.intro a {
color: #fdb09d;
}
.intro a:hover {
color: #fec4b6;
}
CSS从入门到精通-背景样式
第1关 背景颜色
/* ********** BEGIN ********** */
body {
background-color: ivory;
}
/* ********** END ********** */
h1 {
font-size: 40px;
text-align: center;
}
p {
font-size: 18px;
color: grey;
/* ********** BEGIN ********** */
background-color: lightblue;
/* ********** END ********** */
}
第2关 背景图片
body {
/* ********** BEGIN ********** */
/*设置背景图片*/
background-image:url("https://www.educoder.net/attachments/download/211106") ;
/* ********** END ********** */
}
div {
width: 90%;
height: 100%;
margin: auto;
}
第3关 背景定位与背景关联
body {
margin-right: 200px;
/* ********** BEGIN ********** */
/*设置背景图片*/
background: url("https://www.educoder.net/attachments/download/211104") no-repeat fixed right top;
/* ********** END ********** */
}
div {
width: 90%;
height: 100%;
margin: auto;
}
CSS从入门到精通-基础选择器
第1关 CSS 元素选择器
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>元素选择器</title>
<style type="text/css">
/* ********** BEGIN ********** */
/* 元素选择器 */
html {
background-color:#F0F0F0;
}
header {
padding:40px;
background-color:white;
}
footer {
margin-top: 20px;
font-size:0.6em;
color:grey;
}
/* ********** END ********** */
</style>
</head>
<body>
<div>
<header>
<li><a href="#chosen">精选</a></li>
<li><a href="#news">时事</a></li>
<li><a href="#finance">财政</a></li>
<li><a href="#think">思想</a></li>
<li><a href="#life">生活</a></li>
</header>
<div>
<section>
<h2>精选</h2>
<li>精选新闻1</li>
<li>精选新闻2</li>
<li>精选新闻3</li>
</section>
<section>
<h2>时事</h2>
<li>时事新闻1</li>
<li>时事新闻2</li>
<li>时事新闻3</li>
</section>
<section>
<h2>财政</h2>
<li>财政新闻1</li>
<li>财政新闻2</li>
<li>财政新闻3</li>
</section>
<section>
<h2>思想</h2>
<li>思想新闻1</li>
<li>思想新闻2</li>
<li>思想新闻3</li>
</section>
<section>
<h2>生活</h2>
<li>生活新闻1</li>
<li>生活新闻2</li>
<li>生活新闻3</li>
</section>
</div>
<footer>Copyright (c) News Copyright Holder All Rights Reserved.</footer>
</div>
</body>
</html>
第2关 CSS 类选择器
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>类选择器</title>
<style type="text/css">
/* 元素选择器 */
html {
background-color: #F0F0F0;
}
header {
padding: 40px;
background-color: white;
}
footer {
margin-top: 20px;
font-size: 0.6em;
color: grey;
}
/* 类选择器 */
.main {
margin: 10px;
}
/* ********** BEGIN ********** */
.newsSection {
margin-top:20px;
padding:20px;
background-color:white;
}
/* ********** END ********** */
</style>
</head>
<body>
<div class="main">
<header>
<li><a href="#chosen">精选</a></li>
<li><a href="#news">时事</a></li>
<li><a href="#finance">财政</a></li>
<li><a href="#think">思想</a></li>
<li><a href="#life">生活</a></li>
</header>
<!-- ********** BEGIN ********** -->
<div class="newsSection">
<!-- ********** END ********** -->
<section>
<h2>精选</h2>
<li>精选新闻1</li>
<li>精选新闻2</li>
<li>精选新闻3</li>
</section>
<section>
<h2>时事</h2>
<li>时事新闻1</li>
<li>时事新闻2</li>
<li>时事新闻3</li>
</section>
<section>
<h2>财政</h2>
<li>财政新闻1</li>
<li>财政新闻2</li>
<li>财政新闻3</li>
</section>
<section>
<h2>思想</h2>
<li>思想新闻1</li>
<li>思想新闻2</li>
<li>思想新闻3</li>
</section>
<section>
<h2>生活</h2>
<li>生活新闻1</li>
<li>生活新闻2</li>
<li>生活新闻3</li>
</section>
</div>
<footer>Copyright (c) News Copyright Holder All Rights Reserved.</footer>
</div>
</body>
</html>
第3关 CSS id选择器
<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>ID选择器</title>
<style type="text/css">
/* 元素选择器 */
html {
background-color: #F0F0F0;
}
header {
padding: 40px;
background-color: white;
}
footer {
margin-top: 20px;
font-size: 0.6em;
color: grey;
}
/* 类选择器 */
.main {
margin: 10px;
}
.newsSection {
margin-top: 20px;
padding: 20px;
background-color: white;
}
/* ********** BEIGN ********** */
#menu {
}
#chosen {
color:red;
}
#news {
color:blue;
}
#finance {
color:olive;
}
#think {
color:green;
}
#life {
color:orange;
}
/*选择menu元素下的li子元素*/
#menu li {
float: left;
width: 70px;
font-size: 1.2em;
font-weight: lighter;
}
/*选择menu元素下的li子元素和li下得a子元素*/
#menu li, li a {
list-style: none;
text-decoration: none;
}
/* ********** END ********** */
</style>
</head>
<body>
<div class="main">
<!-- ********** BEGIN ********** -->
<header id="menu">
<!-- ********** END ********** -->
<li><a href="#chosen">精选</a></li>
<li><a href="#news">时事</a></li>
<li><a href="#finance">财政</a></li>
<li><a href="#think">思想</a></li>
<li><a href="#life">生活</a></li>
</header>
<div class="newsSection">
<section>
<h2 id="chosen">精选</h2>
<li>精选新闻1</li>
<li>精选新闻2</li>
<li>精选新闻3</li>
</section>
<section>
<h2 id="news">时事</h2>
<li>时事新闻1</li>
<li>时事新闻2</li>
<li>时事新闻3</li>
</section>
<section>
<h2 id="finance">财政</h2>
<li>财政新闻1</li>
<li>财政新闻2</li>
<li>财政新闻3</li>
</section>
<section>
<h2 id="think">思想</h2>
<li>思想新闻1</li>
<li>思想新闻2</li>
<li>思想新闻3</li>
</section>
<section>
<h2 id="life">生活</h2>
<li>生活新闻1</li>
<li>生活新闻2</li>
<li>生活新闻3</li>
</section>
</div>
<footer>Copyright (c) News Copyright Holder All Rights Reserved.</footer>
</div>
</body>
</html>
使用HTML/CSS实现Educoder顶部导航栏
第1关 使用flex布局实现Educoder顶部导航栏容器布局
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Educoder</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script src="step1/verify.js"></script>
</head>
<style type="text/css">
body {
padding: 0;
margin: 0;
}
.color-white {
color: white;
}
/*********** Begin ************/
.container {
height: 60px;
display: flex;
justify-content: space-between;
}
/*********** End ************/
</style>
<body>
<div class="container">
<header style="background: #24292D; min-width:1200px;">
<div class="left-wrap color-white">左边容器</div>
<div class="right-wrap color-white">右边容器</div>
</header>
</div>
</body>
</html>
第2关 实现左侧文字导航列表
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Educoder</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script src="step2/verify.js"></script>
</head>
<style type="text/css">
body {
padding: 0;
margin: 0;
}
.container {
min-width: 1200px;
}
.flex {
display: flex;
}
.full-height {
height: 100%;
}
header {
background: #24292D;
height: 60px;
justify-content: space-between;
padding: 0 25px;
}
header>div {
height: 100%;
display: flex;
align-items: center;
}
/*********** Begin ************/
.logo-block {
display: flex;
align-items: center;
justify-content: center;
}
.logo {
width: 40px;
height: 38px;
margin-right: 30px;
}
.menu-item {
color: #ffffff;
font-size: 16px;
width: 64px;
height: 100%;
display: flex;
align-items: center;
margin-right: 30px;
position: relative;
}
.hot {
position: absolute;
top: 10px;
right: -22px;
}
/*********** End ************/
</style>
<body>
<div class="container">
<header class="flex">
<div class="left-wrap">
<!--********** Begin **********-->
<div class="logo-block">
<img src="https://data.educoder.net/images/educoder/headNavLogo.png?1526520218" class="logo">
</div>
<div class="menu-block full-height flex">
<div class="menu-item"><span>实践课程</span></div>
<div class="menu-item"><span>翻转课堂</span></div>
<div class="menu-item"><span>实训项目</span></div>
<div class="menu-item">
<span>在线竞赛<img class="hot" src="https://img-blog.csdnimg.cn/2022010612112358534.png"></span>
</div>
<div class="menu-item"><span>教学案例</span></div>
<div class="menu-item"><span>交流问答</span></div>
</div>
<!--********** End **********-->
</div>
<div class="right-wrap">
</div>
</header>
</div>
</body>
</html>
第3关 实现右侧功能图标排序
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Educoder</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script src="step3/verify.js"></script>
</head>
<style type="text/css">
body {
padding: 0;
margin: 0;
}
.container {
min-width: 1200px;
}
.flex {
display: flex;
}
.full-height{
height: 100%;
}
header {
background: #24292D;
height: 60px;
justify-content: space-between;
padding: 0 25px;
}
header > div {
height: 100%;
display: flex;
align-items: center;
}
.logo-block{
display: flex;
align-items: center;
justify-content: center;
}
.logo {
width: 40px;
height: 38px;
margin-right: 30px;
}
.menu-item {
color: #ffffff;
font-size: 16px;
width: 64px;
height: 100%;
display: flex;
align-items: center;
margin-right: 30px;
position: relative;
}
.hot{
position: absolute;
top: 10px;
right: -22px;
}
/*********** Begin ************/
.icon-item{
height: 100%;
width: 48px;
display: flex;
align-items: center;
justify-content: center;
}
.user{
width: 34px;
height: 34px;
margin-left: 15px;
}
/*********** End ************/
</style>
<body>
<div class="container">
<header class="flex">
<div class="left-wrap">
<div class="logo-block">
<img src="https://www.educoder.net/images/educoder/headNavLogo.png?1526520218" class="logo">
</div>
<div class="menu-block full-height flex">
<div class="menu-item"><span>实践课程</span></div>
<div class="menu-item"><span>翻转课堂</span></div>
<div class="menu-item"><span>实训项目</span></div>
<div class="menu-item"><span>在线竞赛<img class="hot" src="data:image/png;base64,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"></span></div>
<div class="menu-item"><span>教学案例</span></div>
<div class="menu-item"><span>交流问答</span></div>
</div>
</div>
<div class="right-wrap">
<!--********** Begin **********-->
<div class="icon-list full-height flex">
<div class="icon-item"><img src="https://data.educoder.net/api/attachments/411643" alt=""></div>
<div class="icon-item"><img src="https://data.educoder.net/api/attachments/411644" alt=""></div>
<div class="icon-item"><img src="https://data.educoder.net/api/attachments/411645" alt=""></div>
</div>
<img class="user" src="https://data.educoder.net/images/avatars/User/b?t=1569204859650" alt="">
<!--********** End **********-->
</div>
</header>
</div>
</body>
</html>
第4关 实现左侧鼠标悬停效果与选中状态
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Educoder</title>
<script src="https://cdn.staticfile.org/jquery/1.10.2/jquery.min.js"></script>
<script src="step4/verify.js"></script>
</head>
<style type="text/css">
body {
padding: 0;
margin: 0;
}
.container {
min-width: 1200px;
}
.flex {
display: flex;
}
.full-height {
height: 100%;
}
header {
background: #24292D;
height: 60px;
justify-content: space-between;
padding: 0 25px;
}
header > div {
height: 100%;
display: flex;
align-items: center;
}
.logo-block {
display: flex;
align-items: center;
justify-content: center;
}
.logo {
width: 40px;
height: 38px;
margin-right: 30px;
}
.menu-item {
color: #ffffff;
font-size: 16px;
width: 64px;
height: 100%;
display: flex;
align-items: center;
margin-right: 30px;
position: relative;
cursor: pointer;
}
.hot {
position: absolute;
top: 10px;
right: -22px;
}
.icon-item {
height: 100%;
width: 48px;
display: flex;
align-items: center;
cursor: pointer;
justify-content: center;
}
.user {
width: 34px;
height: 34px;
margin-left: 15px;
cursor: pointer;
}
/*********** Begin ************/
.menu-item:hover {
opacity:.7;
}
.active {
position:relative;
color:#459be5;
}
.active:after {
position:absolute;
content: ' ';
width: 14px;
height: 2px;
background: #459be5;
bottom: -10px;
left: 0;
}
/*********** End ************/
</style>
<body>
<div class="container">
<header class="flex">
<div class="left-wrap">
<div class="logo-block">
<img src="https://www.educoder.net/images/educoder/headNavLogo.png?1526520218" class="logo">
</div>
<div class="menu-block full-height flex">
<div class="menu-item"><span class="active">实践课程</span></div>
<div class="menu-item"><span>翻转课堂</span></div>
<div class="menu-item"><span>实训项目</span></div>
<div class="menu-item"><span>在线竞赛<img class="hot"
src="data:image/png;base64,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"></span>
</div>
<div class="menu-item"><span>教学案例</span></div>
<div class="menu-item"><span>交流问答</span></div>
</div>
</div>
<div class="right-wrap">
<div class="icon-list full-height flex">
<div class="icon-item"><img src="https://www.educoder.net/api/attachments/411643" alt=""></div>
<div class="icon-item"><img src="https://www.educoder.net/api/attachments/411644" alt=""></div>
<div class="icon-item"><img src="https://www.educoder.net/api/attachments/411645" alt=""></div>
</div>
<img class="user" src="https://www.educoder.net/images/avatars/User/b?t=1569204859650" alt="">
</div>
</header>
</div>
</body>
</html>