调整大小时Css3响应式菜单下拉列表错误

Question

我是css3响应式设计的新手并且有一个问题。我有一个下拉式响应菜单，它工作正常，但当我按照手机/平板电脑大小调整浏览器窗口，然后单击菜单，它填充下拉和相同的状态如果我再次将浏览器窗口扩展到完整的桌面大小，我看到所有我的下拉菜单分散在屏幕上，当我刷新页面时，我就变好了。请指教。

我的css是

body {
  margin: 10px;
  -webkit-animation: bugfix infinite 1s;
  /* needed for checkbox hack */
  background: white;
}

@-webkit-keyframes bugfix {
  from {
    padding: 0;
  }
  to {
    padding: 0;
  }
}
/* needed for checkbox hack */
h1, p {
  color: white;
}

#nav {
  position: relative;
}
#nav ul {
  display: none;
  width: 100%;
  list-style:none;
  margin: 0px;
  padding: 0px;
}
#nav ul li a {
  display: block;
  padding: 1em;
  background: #1c76ba;
  color: white;
  text-decoration: none;
  border-right: 1px solid #175f97;
}
#nav ul li a:hover {
  background: #18a2e7;
}
#nav ul li:last-of-type a {
  border-right: 0px;
  border-bottom: 1px;
}
#nav ul li ul li a {
  padding-left: 1.5em;
}
#nav ul li ul li ul li a {
  padding-left: 3.125em;
}
#nav input.trigger {
  position: absolute;
  top: -9999px;
  left: -9999px;
}
#nav input.trigger:checked ~ ul, #nav input.trigger:checked ~ ul li ul {
  display: block !important;
}
@media (min-width: 48em) {
  #nav input.trigger:checked ~ ul, #nav input.trigger:checked ~ ul li ul {
    /* older flexbox */
    display: -webkit-box;
    display: -moz-box;
    display: box;
    -webkit-box-orient: horizontal;
    -moz-box-orient: horizontal;
    box-orient: horizontal;
    /* newer flexbox */
    display: flex;
    flex-direction: row;
  }
}
#nav label {
  position: relative;
  display: block;
  min-height: 2em;
  padding: .45em;
  font-size: 1.1em;
  margin: 0;
  cursor: pointer;
  background: #20598d;
  line-height: 2em;
  color: #bfe1fb;
}
#nav label:after {
  position: absolute;
  right: 1em;
  top: .2em;
  content: "\2261";
  font-size: 1.8em;
  color: white;
}
@media (min-width: 48em) {
  #nav ul {
    /* older flexbox */
    display: -ms-flexbox;
    flex-direction: -ms-row;
    display: -webkit-box;
    display: -moz-box;
    display: box;
    -webkit-box-orient: horizontal;
    -moz-box-orient: horizontal;
    box-orient: horizontal;
    /* newer flexbox */
    display: flex;
    flex-direction: row;
  }
  #nav ul li {
    position: relative;
    text-align: center;
    /* older flexbox */
    -ms-flex: 1;
    -webkit-box-flex: 1;
    -moz-box-flex: 1;
    box-flex: 1;
    /* newer flexbox */
    flex: 1;
  }
  #nav ul li ul {
    display: none !important;
    position: absolute;
    top: 3.0625em;
    left: 0;
    display: block;
    width: 12.5em;
    z-index: 200;
  }
  #nav ul li ul li {
    text-align: left;
  }
  #nav ul li ul li ul {
    z-index: 300;
    top: 0px;
    left: 12.4em;
  }
  #nav ul li ul li ul li a {
    padding-left: 30px !important;
  }
  #nav ul li:hover > ul {
    display: block !important;
  }
  #nav label {
    display: none;
  }
}