html,
body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
  font-size: 12px;
  font-family: "Microsoft Yahei", Arial, sans-serif;
  background: #08080d;
}
[hidden] { display: none !important; }
* { box-sizing: border-box; transition: opacity .2s ease, transform .2s ease; }
html, body, div, ul, ol, li, dl, dt, dd, h1, h2, h3, h4, h5, h6, p, table, th, td, form, fieldset, legend, input, textarea, select, button, hr, blockquote, pre { margin: 0; padding: 0; outline: none; }
img { border: 0; vertical-align: middle; max-width: 100%; }
a { text-decoration: none; color: inherit; }
a:active { opacity: .72; }
button { font-family: inherit; }

.landing {
  width: 100%;
  height: calc(var(--vh, 1vh) * 100);
  min-height: 480px;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  position: relative;
  isolation: isolate;
}
.page-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: fill;
  z-index: 0;
  pointer-events: none;
}
header {
  width: 100%;
  display: flex;
  align-items: flex-start;
  padding: 15px 15px 0;
  position: absolute;
  top: env(safe-area-inset-top, 0);
  left: 0;
  z-index: 10;
}
header > img {
  width: 25%;
  max-width: 100px;
  height: auto;
  display: block;
}
main {
  width: 100%;
  flex: 1;
  overflow: hidden;
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}
.swiper,
.swiper-wrapper,
.swiper-slide {
  width: 100%;
  height: 100%;
}
.swiper {
  position: relative;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.swiper-wrapper {
  position: relative;
  overflow: hidden;
}
.swiper-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  overflow: hidden;
}
.swiper-slide.active {
  opacity: 1;
  z-index: 2;
}
.swiper-slide > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
footer {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 10px 0 calc(15px + env(safe-area-inset-bottom, 0));
  position: relative;
  z-index: 2;
}
footer > .tip {
  width: 70%;
  max-width: 500px;
  height: auto;
}
.box {
  width: 100%;
  display: flex;
  flex-direction: row;
  justify-content: space-around;
  align-items: center;
  padding: 10px 0;
}
.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-link.download-busy { opacity: .8; transform: scale(.985); }
.announce {
  position: fixed;
  z-index: 60;
  top: 0;
  left: 0;
  right: 0;
  padding: 8px 14px;
  text-align: center;
  color: #fff;
  background: rgba(0,0,0,.72);
}
.contact-button {
  position: fixed;
  right: 14px;
  bottom: 96px;
  z-index: 50;
  padding: 10px 12px;
  border-radius: 4px;
  color: #fff;
  background: rgba(255, 59, 59, .92);
}
.full-mask,
.modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 22px;
  color: #fff;
  background: rgba(0, 0, 0, .78);
}
.full-mask > div,
.modal-card {
  width: min(340px, 92vw);
  padding: 22px;
  border-radius: 6px;
  background: rgba(18, 18, 24, .96);
  text-align: center;
}
.full-mask h2,
.modal-card h3 {
  font-size: 20px;
  line-height: 1.3;
  margin-bottom: 10px;
}
.full-mask p,
.modal-card p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,.78);
}
.modal-x {
  float: right;
  width: 28px;
  height: 28px;
  border: 0;
  color: #fff;
  background: transparent;
  font-size: 18px;
}
.modal-button,
.modal-link {
  margin-top: 16px;
  min-height: 40px;
  padding: 0 18px;
  border: 0;
  border-radius: 4px;
  color: #fff;
  background: #ff3b3b;
}
.modal-link {
  margin-left: 8px;
  background: transparent;
  color: rgba(255,255,255,.75);
}
@media (min-width: 760px) {
  .a-link > img { max-width: 220px; }
  footer > .tip { max-width: 560px; }
}