body {
  background: #f5f5f7;
}
.header-wrapper {
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
}
.img404 {
  width: 100%;
  height: calc(100vh - 326px);
  overflow: hidden;
  position: relative;
  margin-top: 76px;
}
.img404 .mainBox {
  width: 360px;
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  margin-top: -20px;
}
.img404 .mainBox img {
  display: block;
  width: 360px;
  margin: 0 auto;
}
.img404 .mainBox p {
  margin-top: 40px;
  line-height: 24px;
  font-size: 18px;
  text-align: center;
  color: #3d3d3d;
}