<!DOCTYPE html>
<html lang="zh">

<head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
</head>

<body>
    <header>
        <h1>
            Sample - Bootstrap<small class="text-muted">Modal</small></h1>
    </header>
    <section id="main">
        <div class="modal fade" id="exampleModal" tabindex="-1" aria-labelledby="exampleModalLabel" aria-hidden="true">
            <!--  Modal  -->
            <div class="modal-dialog modal-dialog-centered">
  