<section id="contact">

    <div class="contact-form bg-primary p-2">

      <h2 class="m-heading">Contact Us</h2>

      <p>如有疑问请填写以下信息联系我们!</p>

      <form>

        <div class="form-group">

          <label for="name">姓名</label>

          <input type="text" name="name" id="name" placeholder="情输入姓名">

        </div>

        <div class="form-group">

          <label for="name">邮箱</label>

          <input type="email" name="email" id="email" placeholder="情输入邮箱">

        </div>

        <div class="form-group">

          <label for="message">反馈信息</label>

          <textarea name="message" id="message" placeholder="情输入内容"></textarea>

        </div>

      </form>

      <input type="submit" class="btn btn-dark">

    </div>

    <div class="contact-img"></div>

  </section>

  <!-- foter -->

  <foter id="main-footer" class="bg-dark text-center py-1">

    <div class="container">

      <p>Copyright &copy; 2021, 米修在线, All Right Reserved</p>

    </div>

  </foter>

/* rest */

* {

  padding: 0;

  margin: 0;

  box-sizing: border-box;

}

html {

  scroll-behavior: smooth;

}

body {

  font-family: Arial, Helvetica, sans-serif;

  line-height: 1.4;

}

a {

  text-decoration: none;

}

p {

  margin: 0.75rem 0;

}

/* utility classes */

.container {

  max-width: 1100px;

  margin: 0 auto;

  padding: 0 2rem;

  overflow: hidden;

}

.text-center {

  text-align: center;

}

.bg-light {

  background: #f4f4f4;

  color: #333;

}

.bg-dark {

 background: #333;

 color: #fff;

}

.bg-primary {

  background: #93cb52;

  color: #fff;

}

.p-1 {

  padding: 1.5rem;

}

.p-2 {

  padding: 2rem;

}

.p-3 {

  padding: 3rem;

}

.text-primary {

  color: #32cb52;

}

.l-heading {

  font-size: 4rem;

  margin-bottom: 0.75rem;

  line-height: 1.1;

}

.m-heading {

  font-size: 2rem;

  margin-bottom: 0.75rem;

  line-height: 1.1;

}

.lead {

  font-size: 1.3rem;

  margin-bottom: 2rem;

}

.py-1 {

  padding: 1.5rem 0;

}

.py-2 {

  padding: 2rem 0;

}

.py-3 {

  padding: 3rem 0;

}

.btn {

  display: inline-block;

  color: #fff;

  background-color: #93cb52;

  padding: 0.5rem 2rem;

  border: none;

  border-radius: 5px;

}

.btn:hover {

  background-color: #7ab436;

}

.btn-dark {

  background: #333;

  color: #fff;

}

.list {

  margin: 0.5rem 0;

  list-style: none;

}

.list li {

  padding: 0.5rem 0;

  border-bottom: #444 dotted 1px;

}

/* navbar */

#navbar {

  display: flex;

  /* 两端对齐 */

  justify-content: space-between;

  background: #333;

  color: #fff;

  position: sticky;

  top: 0;

  z-index: 1;

  padding: 1rem;

}

#navbar ul {

  display: flex;

  list-style: none;

  /* 以中心点进行对齐 */

  align-items: center;

}

#navbar ul li a {

  color: white;

  padding: 0.75rem;

  margin: 0 0.25rem;

}

#navbar ul li a:hover {

  background: #93cb52;

  border-radius: 5px;

}

/* home */

#home {

  background: url('../img/1.jpg') no-repeat center center/cover;

  height: 100vh;

  color: #ffffff;

  position: relative;

}

#home .home-content {

  display: flex;

  /* 垂直方向排列 */

  flex-direction: column;

  /* 垂直居中 */

  justify-content: center;

  /* 水平居中 */

  align-items: center;

  text-align: center;

  height: 100%;

  padding: 0 2rem;

  position: absolute;

  left: 0;

  top: 0;

  bottom: 0;

  right: 0;

  background: rgba(0,0,0,0.4);

}

/* section: what we do */

#what .items {

  display: flex;

  padding: 1rem;

}

#what .items .item {

  flex: 1;

  text-align: center;

}

#what .items .item i {

  background: #93cb52;

  padding: 1rem;

  border-radius: 50%;

  margin-bottom: 1rem;

}

/* section : Who We Are */

#who {

  display: flex;

}

#who div {

  flex: 1;

  flex-basis: 50%;

}

#who .who-img {

  background: url('../img/2.jpg') no-repeat center center/cover;

}

/* section: clients */

#clients .items {

  overflow: hidden;

  display: flex;

  justify-content: space-around;

}

#clients .items img {

  display: block;

  margin: 0 auto;

  border-radius: 50%;

  width: 100%;

  height: 100%;

}

#clients .items div{

  justify-content: space-around;

  width: 100px;

  height: 100px;

  border-radius: 50%;

}

/* section: contact */

#contact {

  display: flex;

}

#contact .contact-form,

#contact .contact-img {

  flex: 1;

}

#contact .contact-img {

  background: url('../img/2.jpg') no-repeat center center/cover;

}

#contact .contact-form .from-group {

  margin: 0.75rem;

}

#contact .contact-form label {

  display: block;

}

#contact .contact-form input,

#contact .contact-form textarea {

  width: 100%;

  padding: 0.5rem;

}