* {
  box-sizing: border-box;
  transition: all 0.2s;
}

img {
  vertical-align: middle;
}

body {
  width: 100%;
  height: 100vh;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  background: url(../image/bg-3.jpg) no-repeat;
  background-size: 100% 100%;
  overflow: hidden;
  position: relative;
}

header {
  width: 100%;
  display: flex;
  align-items: flex-start;
  padding: 15px 15px 0;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 100;
}

header>img:nth-of-type(1) {
  width: 25%;
  max-width: 100px;
}

header>img:nth-of-type(2) {
  width: 25%;
  margin-left: auto;
  margin-right: 10px;
}

header>img:nth-of-type(3) {
  width: 25%;
}

main {
  width: 100%;
  flex: 1;
  overflow: hidden;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.swiper,
.swiper-wrapper,
.swiper-slide {
  width: 100%;
  height: 100%;
}

.swiper-slide {
  overflow: hidden;
}

.swiper-slide>img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

footer {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0 15px;
}

footer>img {
  width: 70%;
}

.box {
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
  padding: 10px 0;
}

.box>img {
  width: 40%;
  margin-bottom: 10px;
}

.box>img:nth-of-type(2n) {
  margin-left: 10px;
}

/* #installBtn {
    width: 20%;
    position: absolute;
    right: 10px;
    bottom: 10px;
} */

.ad-box-1 {
  position: absolute;
  z-index: 20;
  right: 10%;
  bottom: 29%;
}

.ad-box-2 {
  position: absolute;
  z-index: 20;
  right: 15%;
  bottom: 14%;
}

.a-link {
  display: flex;
  flex-direction: column;
  align-items: center;
  width: auto;
  color: #fff;
  text-align: center;
  text-decoration: none;
}

.a-link>img {
  width: auto;
  height: auto;
  max-width: 180px;
  display: block;
}

.a-name {
  margin-top: 5px;
  font-size: 14px;
  color: #fff;
}

.float {
  /* 不再使用 */
  display: none;
}