html {
  font-size: 16px;
  /* 1rem = 16px */
  background: linear-gradient(180deg, #E2F4FE 0%, #FAFAFA 50%);
  height: 100vh;
}

body {
  padding: 0;
  margin: 0;
}

p {
  margin: 0;
}

.flex-column, .main, .info {
  display: flex;
  align-items: center;
  flex-direction: column;
}

.flex-center, .header {
  display: flex;
  justify-content: center;
  align-items: center;
}

.main {
  padding: 2rem 1.5rem  0;
}

.header {
  background: transparent;
  height: 80px;
  text-align: center;
  width: 100%;
  box-sizing: border-box;
  padding: 0.6rem 1.2rem;
  position: relative;
  color: #333;
  display: flex;
  align-items: center;
}

.back {
  width: 0.5rem;
  height: 1rem;
  position: absolute;
  top: 50%;
  left: 1rem;
  background: url("../images/back.png") center/100% 100% no-repeat;
  transform: translateY(-50%);
}


img {
  width: 80px;
  height: 80px;
  margin: 0 auto 30px;
  display: block;
}

.info {
  justify-content: center;
  width: 100%;
  margin-bottom: 30px;
  padding: 1rem 0;
  border-radius: 8px;
  border: 2px solid #1F9FFD;
}

.info a {
  background-color: #1F9FFD;
  border-radius: 22px;
  padding: 0.3rem 0.8rem;
  text-align: center;
  color: #fff;
  font-size: 13px;
  text-decoration: none;
  display: block;
  margin-bottom: 10px;
}

.info a:link, .info a:visited {
  text-decoration: none;
}

.info p {
  margin-bottom: 1rem;
}

.icon {
  position: relative;
}

.icon::after {
  content: '';
  display: block;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.icon-link {
  width: 200px;
  box-sizing: border-box;
  position: relative;
  padding-right: 1rem !important;
  padding-left: 1.6rem !important;
}

.icon-link::after {
  content: '';
  display: block;
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
}

.icon-ios::after {
  width: 11px;
  height: 12px;
  background: url("../images/ios.png") center/100% 100% no-repeat;
  right: -1rem;
}

.icon-android::after {
  width: 12px;
  height: 18px;
  background: url("../images/android.png") center/100% no-repeat;
  right: -1rem;
}

.icon-google::after {
  width: 12px;
  height: 12px;
  background: url("../images/google.png") center/100% no-repeat;
  right: -1rem;
}

.icon-yingyongbao::after {
  width: 12px;
  height: 12px;
  background: url("../images/yingyongbao.png") center/100% no-repeat;
  left: 1.3rem;
}

.icon-xiaomi::after {
  width: 12px;
  height: 12px;
  background: url("../images/xiaomi.png") center/100% no-repeat;
  left: 1rem;
}

.icon-apk::after {
  width: 12px;
  height: 12px;
  background: url("../images/apk.png") center/100% no-repeat;
  left: 1.7rem;
}

.icon-apk-nocn {
  width: 172px;
  padding-right: 0.5rem!important;
}
.icon-apk-nocn::after {
  left: 1rem;
}

.mask {
  top: 0;
  width: 100%;
  height: 100vh;
  position: absolute;
  z-index: 100;
  background-color: rgba(0, 0, 0, .8);
  display: none;
}
.mask .content {
  position: absolute;
  top: 35px;

}
.mask img {
  width: 35%;
  height: auto;
  /* position: absolute;
  top: 0px;
  right: 10px; */
  margin: 0;
  margin-left: auto;
  transform: rotate(-20deg);
}

.mask p {
  width: 60%;
  margin: 0 auto;
  color: #fff;
  font-size: 15px;
  line-height: 1.5;
  margin-top: 50px;
}
.mask p:last-of-type {
  margin-top: 5px;
}