* {
  margin: 0;
  box-sizing: border-box;
  padding: 0;
}
.container {
  width: 100%;
  height: 100%;
  max-width: 700px;
  margin: 0 auto;
  margin-bottom: 70px;
  padding: 10px;
}
.container > .banner {
  width: 100%;
}
.container > .banner img {
  width: 100%;
}
.container > .text {
  width: 100%;
  padding: 20px 0;
  font-size: 18px;
  line-height: 1.5;
  text-align: left;
}
.container > .text p {
  padding: 10px 0;
}
.container > button {
  width: 96%;
  padding: 10px;
  color: #fff;
  border: none;
  font-size: 18px;
  border-radius: 5px;
  display: flex;
  align-items: center;
  background-color: #ffe711;
  position: fixed;
  bottom: 10px;
  left: 0;
  right: 0;
  margin: 0 auto;
  z-index: 100;
  max-width: 700px;
  animation: bounce 1s infinite;
}
.container > button img {
  width: 45px;
  height: 45px;
  border-radius: 50%;
}
.container > button span {
  font-size: 18px;
  color: #222;
  font-weight: 600;
  margin-left: 10px;
}
@keyframes bounce {
  0%,
  20%,
  50%,
  80%,
  100% {
    transform: translateY(0);
    /* 初始位置 */
  }
  40% {
    transform: translateY(-10px);
    /* 向上跳10px */
  }
  60% {
    transform: translateY(-5px);
    /* 回落5px，模拟弹跳 */
  }
}