.pop-background {
  position: fixed;
  left: 0;
  bottom: 0;
  right: 0;
  top: 0;
  z-index: 999999;
  background: rgba(0, 0, 0, 0.85);
}
.pop-background .pop-window {
  position: absolute;
  width: 93.5vw;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  background-color: #2979ff;
  color: #fff;
  border-radius: 2.6vw;
  box-shadow: 0 0 0.8vw rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
}
.pop-background .pop-window .title {
  width: 100%;
  height: 10vw;
  line-height: 10vw;
  text-align: center;
  font-size: 6vw;
  margin: 6vw 0;
}
.pop-background .pop-window .content {
  width: 90%;
  height: 80vw;
  position: relative;
  left: 50%;
  transform: translateX(-50%);
  border-radius: 4vw;
  margin-bottom: 6vw;
  background-color: #fff;
  color: #888;
}
.pop-background .pop-window .content .qr-code-bg {
  width: 60vw;
  height: 60vw;
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  border: 1vw solid #2962ff;
  border-radius: 4vw;
}
.pop-background .pop-window .content .qr-code-bg .qr-code {
  width: 52vw;
  height: 52vw;
  position: relative;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}
.pop-background .pop-window .content .qr-code-bg .qr-code-logo {
  position: absolute;
  width: 14vw;
  height: 14vw;
  background-color: #fff;
  border-radius: 1.5vw;
  left: 50%;
  /* left 父盒子宽度的一半 */
  margin-left: -7vw;
  /* 左走自己宽度 的一半 */
  top: 50%;
  margin-top: -7vw;
  border: 0.6vw solid #2962ff;
}
.pop-background .pop-window .btn-wrapper {
  width: 100%;
  text-align: center;
  font-size: 6vw;
  margin: 6vw 0;
}
.pop-background .pop-window .btn-wrapper button {
  width: 30vw;
  height: 8vw;
}