.dn {
  display: none !important;
}
img {
  height: auto;
  display: block;
  -webkit-user-select: none;
  -webkit-touch-callout: none;
  -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}
img[src=""] {
  display: none;
}
.w {
  width: 62.5vw;
  margin: 0 auto;
}
body {
  background-color: #fff;
  font: 0.63vw/1.5 'Microsoft YaHei', 'Heiti SC', tahoma, arial, 'Hiragino Sans GB', \\5B8B\4F53, sans-serif;
  overflow-x: hidden;
}
video {
  outline: none;
}