1.页面效果

2.login.wxml

<view class="login-container">
  <view class="title">微信小程序App</view>
  <view class="login-box">
    <label>用户名</label>
    <input placeholder="请输入用户名"/>
    <label>密码</label>
    <input placeholder="请输入密码"/>
    <button class="login-btn">立即登录</button>
    <view class="three-line">一一一一一第三方登录一一一一一</view>
    <button class="login-btn" style="background-color:green;">微信登录</button>
  </view>
</view>

3.  login.wxss

/* pages/login/login.wxss */
page{
  height: 100%;    /* 使用page的height可以使页面占全屏 */
  background-color: #fafafa;
 }
.login-container{
  padding: 0 10%;
  height: 100%;
}
.title{
  font-size: large;
  text-align: center;
  padding-top: 10%;
  font-weight: bold;
}
.login-box{
  margin-top: 10%;
  padding: 10% 5%;
  background-color: white;
  border-radius: 10px;
  box-shadow: 0 4px 4px #888888;
}
.login-box>input{
  margin: 5% 0 8% 0;
  border-bottom: 1rpx solid lightgray;
}
.login-btn{
  width: 100%!important;
  background-color: #2f6afd;
  color: white;
  font-weight: normal;
}
 
.three-line{
  margin: 8% 0;
  text-align: center;
  font-size: 12px;
  color: gray;
}