<!DOCTYPE HTML>
<html>
<head>
<meta charset="utf-8">
<title>标题（一）</title>
<link rel="stylesheet" href="https://cdn.bootcss.com/bootstrap/4.0.0-beta.2/css/bootstrap.min.css">
</head>
<body>
<!--Bootstrap中的标题-->
<h1>Bootstrap标题一</h1>
<h2>Bootstrap标题二</h2>
<h3>Bootstrap标题三</h3>
<h4>Bootstrap标题四</h4>
<h5>Bootstrap标题五</h5>
<h6>Bootstrap标题六</h6>
<!--Bootstrap中让非标题元素和标题使用相同的样式-->
<div class="h1">Bootstrap标题一</div>
<div class="h2">Bootstrap标题二</div>
<div class="h3">Bootstrap标题三</div>
<div class="h4">Bootstrap标题四</div>
<div class="h5">Bootstrap标题五</div>
<div class="h6">Bootstrap标题六</div>
<!--任务填写下方-->
</body>
</html>
h1,
h2,
h3,
h4,
h5,
h6,
.h1,
.h2,
.h3,
.h4,
.h5,
.h6 {
font-family: inherit;
font-weight: 500;
line-height: 1.1;
color: inherit;
}
h1 small,
h2 small,
h3 small,
h4 small,
h5 small,
h6 small,
.h1 small,
.h2 small,
.h3 small,
.h4 small,
.h5 small,
.h6 small,
h1 .small,
h2 .small,
h3 .small,
h4 .small,
h5 .small,
h6 .small,
.h1 .small,
.h2 .small,
.h3 .small,
.h4 .small,
.h5 .small,
.h6 .small {
font-weight: normal;
line-height: 1;
color: #999;
}
h1,
.h1,
h2,
.h2,
h3,
.h3 {
margin-top: 20px;
margin-bottom: 10px;
}
h1 small,
.h1 small,
h2 small,
.h2 small,
h3 small,
.h3 small,
h1 .small,
.h1 .small,
h2 .small,
.h2 .small,
h3 .small,
.h3 .small {
font-size: 65%;
}
h4,
.h4,
h5,
.h5,
h6,
.h6 {
margin-top: 10px;
margin-bottom: 10px;
}
h4 small,
.h4 small,
h5 small,
.h5 small,
h6 small,
.h6 small,
h4 .small,
.h4 .small,
h5 .small,
.h5 .small,
h6 .small,
.h6 .small {
font-size: 75%;
}
h1,
.h1 {
font-size: 36px;
}
h2,
.h2 {
font-size: 30px;
}
h3,
.h3 {
font-size: 24px;
}
h4,
.h4 {
font-size: 18px;
}
h5,
.h5 {
font-size: 14px;
}
h6,
.h6 {
font-size: 12px;
}
p {
margin: 0 0 10px;
}
.lead {
margin-bottom: 20px;
font-size: 16px;
font-weight: 200;
line-height: 1.4;
}
@media (min-width: 768px) {
.lead {
font-size: 21px;
}
}
small,
.small {
font-size: 85%;
}
cite {
font-style: normal;
}
.text-left {
text-align: left;
}
.text-right {
text-align: right;
}
.text-center {
text-align: center;
}
.text-justify {
text-align: justify;
}
.text-muted {
color: #999;
}
.text-primary {
color: #428bca;
}
a.text-primary:hover {
color: #3071a9;
}
.text-success {
color: #3c763d;
}
a.text-success:hover {
color: #2b542c;
}
.text-info {
color: #31708f;
}
a.text-info:hover {
color: #245269;
}
.text-warning {
color: #8a6d3b;
}
a.text-warning:hover {
color: #66512c;
}
.text-danger {
color: #a94442;
}
a.text-danger:hover {
color: #843534;
}
.bg-primary {
color: #fff;
background-color: #428bca;
}
a.bg-primary:hover {
background-color: #3071a9;
}
.bg-success {
background-color: #dff0d8;
}
a.bg-success:hover {
background-color: #c1e2b3;
}
.bg-info {
background-color: #d9edf7;
}
a.bg-info:hover {
background-color: #afd9ee;
}
.bg-warning {
background-color: #fcf8e3;
}
a.bg-warning:hover {
background-color: #f7ecb5;
}
.bg-danger {
background-color: #f2dede;
}
a.bg-danger:hover {
background-color: #e4b9b9;
}
.page-header {
padding-bottom: 9px;
margin: 40px 0 20px;
border-bottom: 1px solid #eee;
}
ul,
ol {
margin-top: 0;
margin-bottom: 10px;
}
ul ul,
ol ul,
ul ol,
ol ol {
margin-bottom: 0;
}
.list-unstyled {
padding-left: 0;
list-style: none;
}
.list-inline {
padding-left: 0;
margin-left: -5px;
list-style: none;
}
.list-inline > li {
display: inline-block;
padding-right: 5px;
padding-left: 5px;
}
dl {
margin-top: 0;
margin-bottom: 20px;
}
dt,
dd {
line-height: 1.42857143;
}
dt {
font-weight: bold;
}
dd {
margin-left: 0;
}
@media (min-width: 768px) {
.dl-horizontal dt {
float: left;
width: 160px;
overflow: hidden;
clear: left;
text-align: right;
text-overflow: ellipsis;
white-space: nowrap;
}
.dl-horizontal dd {
margin-left: 180px;
}
}
abbr[title],
abbr[data-original-title] {
cursor: help;
border-bottom: 1px dotted #999;
}
.initialism {
font-size: 90%;
text-transform: uppercase;
}
blockquote {
padding: 10px 20px;
margin: 0 0 20px;
font-size: 17.5px;
border-left: 5px solid #eee;
}
blockquote p:last-child,
blockquote ul:last-child,
blockquote ol:last-child {
margin-bottom: 0;
}
blockquote footer,
blockquote small,
blockquote .small {
display: block;
font-size: 80%;
line-height: 1.42857143;
color: #999;
}
blockquote footer:before,
blockquote small:before,
blockquote .small:before {
content: '\2014 \00A0';
}
.blockquote-reverse,
blockquote.pull-right {
padding-right: 15px;
padding-left: 0;
text-align: right;
border-right: 5px solid #eee;
border-left: 0;
}
.blockquote-reverse footer:before,
blockquote.pull-right footer:before,
.blockquote-reverse small:before,
blockquote.pull-right small:before,
.blockquote-reverse .small:before,
blockquote.pull-right .small:before {
content: '';
}
.blockquote-reverse footer:after,
blockquote.pull-right footer:after,
.blockquote-reverse small:after,
blockquote.pull-right small:after,
.blockquote-reverse .small:after,
blockquote.pull-right .small:after {
content: '\00A0 \2014';
}
blockquote:before,
blockquote:after {
content: "";
}
address {
margin-bottom: 20px;
font-style: normal;
line-height: 1.42857143;
}
code,
kbd,
pre,
samp {
font-family: Menlo, Monaco, Consolas, "Courier New", monospace;
}
code {
padding: 2px 4px;
font-size: 90%;
color: #c7254e;
white-space: nowrap;
background-color: #f9f2f4;
border-radius: 4px;
}
kbd {
padding: 2px 4px;
font-size: 90%;
color: #fff;
background-color: #333;
border-radius: 3px;
box-shadow: inset 0 -1px 0 rgba(0, 0, 0, .25);
}
pre {
display: block;
padding: 9.5px;
margin: 0 0 10px;
font-size: 13px;
line-height: 1.42857143;
color: #333;
word-break: break-all;
word-wrap: break-word;
background-color: #f5f5f5;
border: 1px solid #ccc;
border-radius: 4px;
}
pre code {
padding: 0;
font-size: inherit;
color: inherit;
white-space: pre-wrap;
background-color: transparent;
border-radius: 0;
}
.pre-scrollable {
max-height: 340px;
overflow-y: scroll;
}
