* {
  margin: 0;
  padding: 0;
  text-decoration: none;
  box-sizing: border-box;
}
body {
  background-color: #f2f2f2;
}
.container {
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: 2px 10px;
}
.container > .banner {
  width: 100%;
}
.container > .banner img {
  width: 100%;
}
.container > .text {
  padding: 20px;
  border-radius: 10px;
  font-size: 18px;
  margin-top: 20px;
  font-weight: 800;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  /* 添加阴影 */
  background-color: #fff;
}
.container > .footer {
  width: 96%;
  position: fixed;
  bottom: 10px;
  left: 0;
  right: 0;
  text-align: center;
  background-color: #1a73e8;
  font-size: 18px;
  padding: 10px 0;
  border-radius: 8px;
  cursor: pointer;
  color: #fff;
  font-weight: 800;
  margin: 0 auto;
}