payProject/components/local/navigation/navigation.wxss

/* components/local/navigation/navigation.wxss */
.nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
}

.nav-main {
  width: 100%;
  height: 100%;
  position: relative;
}

.nav .capsule-box {
  position: absolute;
  box-sizing: border-box;
  width: 100%;
}