* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  overflow: hidden;
}

.box {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  background-color: #000;
  position: relative;
  overflow: hidden;
}
.box2 {
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100vw;
  height: 100vh;
  background-color: #000;
  position: relative;
  overflow: hidden;
}
.box_bg {
  position: absolute;
  z-index: 1;
}

.title_box {
  position: absolute;
  z-index: 2;
  width: 90vw;
  /* height: 15vh; */
  top: 8%;
}

.btn_box {
  position: absolute;
  z-index: 2;
  bottom: 15%;
  text-align: center;
}

.btn {
  position: relative;
  width: 57%;
  transform: rotate(-12deg);
}

#open_btn {
  left: -10%;
}

#down_btn {
  right: -10%;
  margin-top: -20px;
}
#android_down {
  left: -10%;
}
#open_h5_btn {
  right: -10%;
  margin-top: -20px;
}
.btn_box2 {
  position: absolute;
  z-index: 2;
  bottom: 15%;
  text-align: center;
}
.btn2 {
  position: relative;
  width: 57%;
  transform: rotate(-12deg);
}
.h5_btn_box {
  position: relative;
  width: 57%;
  margin: 0 auto;
  transform: rotate(-12deg);
}
.btn_h5 {
  width: 100%;
}
.h5_tag {
  position: absolute;
  width: 32%;
  top: -30%;
  right: -10%;
}

/* 当屏幕宽度小于等于 600px 时应用这些样式 */
@media (max-width: 600px) {
  .box_bg {
    width: 100%;
  }
}

/* 当屏幕宽度大于 600px 应用这些样式 */
@media (min-width: 601px) {
  .box_bg {
    height: 100%;
  }
}

.hidden {
  display: none;
}