Css 如何让手机菜单占据Wordpress屏幕50%的宽度？

我有一个问题后，安装启用移动菜单为我的自定义主题得到填补了100%的屏幕宽度。那么，我怎样才能让移动菜单像下面的概念一样占据屏幕宽度的50%呢

这里是移动菜单的css

 .mn-navigation-wrap.mn-dark [class*="icono-"] {
  color: #000; }

.mn-icon-wrap {
  position: relative;
  padding: 12px;
  border: 1px solid transparent;
  display: inline-block;
  box-sizing: content-box;
  vertical-align: top;
  background-color: transparent;
  margin-bottom: 0;
  overflow: hidden;
  float: right;
  -webkit-touch-callout: none;
  -webkit-user-select: none;
  -khtml-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none; }
  .mn-icon-wrap:hover {
    cursor: pointer; }
  .mn-icon-wrap [class*="icono-"], .mn-icon-wrap [class*="icono-"] * {
    box-sizing: border-box; }
  .mn-icon-wrap [class*="icono-"] {
    display: inline-block;
    vertical-align: middle;
    position: relative;
    font-style: normal;
    color: #fff;
    text-align: left;
    text-indent: -9999px;
    direction: ltr; }
  .mn-icon-wrap [class*="icono-"]:before,
  .mn-icon-wrap [class*="icono-"]:after {
    content: '';
    pointer-events: none; }
  .mn-icon-wrap .icono-cross:before {
    width: 20px;
    height: 2px; }
  .mn-icon-wrap .icono-cross:after {
    height: 20px;
    width: 2px; }
  .mn-icon-wrap .icono-cross:before,
  .mn-icon-wrap .icono-cross:after {
    box-shadow: inset 0 0 0 32px;
    position: absolute;
    left: 50%;
    top: 50%;
    -webkit-transform: translate(-50%, -50%);
    -moz-transform: translate(-50%, -50%);
    -ms-transform: translate(-50%, -50%);
    -o-transform: translate(-50%, -50%);
    transform: translate(-50%, -50%);
    border-radius: 5px; }
  .mn-icon-wrap .icono-bars {
    width: 20px;
    height: 2px;
    box-shadow: inset 0 0 0 32px,0 -6px,0 6px;
    margin: 16px 7px;
    border-radius: 5px; }
  .mn-icon-wrap .icono-cross {
    display: none;
    width: 30px;
    height: 30px;
    margin: 2px;
    -webkit-transform: rotate(45deg);
    -moz-transform: rotate(45deg);
    -ms-transform: rotate(45deg);
    -o-transform: rotate(45deg);
    transform: rotate(45deg); }

.mn-navigation-wrap {
  display: none;
  max-height: 60px;
  background: #000;
  background: #dd3333;
  overflow: hidden;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 10000; }
  .mn-navigation-wrap.hidebar {
    -webkit-transition: max-height 0.3s ease-in-out;
    -moz-transition: max-height 0.3s ease-in-out;
    -o-transition: max-height 0.3s ease-in-out;
    transition: max-height 0.3s ease-in-out; }
  .mn-navigation-wrap .mn-logo-text {
    float: left;
    height: 60px;
    line-height: 60px;
    padding-left: 20px;
    font-size: 24px; }
    .mn-navigation-wrap .mn-logo-text a {
      color: #fff;
      text-decoration: none;
      font-family: Georgia;
      font-family: ''; }
  .mn-navigation-wrap .mn-logo-image {
    height: 60px;
    display: block;
    float: left;
    padding: 10px 15px;
    -moz-box-sizing: border-box;
    box-sizing: border-box; }
    .mn-navigation-wrap .mn-logo-image img {
      height: 100%;
      width: auto; }
  .mn-navigation-wrap .mn-menu-wrap {
    display: none;
    font-family: Arial;
    font-family: ''; }
    .mn-navigation-wrap .mn-menu-wrap ul {
      clear: both;
      padding: 0;
      margin: 0; }
    .mn-navigation-wrap .mn-menu-wrap .sub-menu a {
      padding-left: 50px; }
    .mn-navigation-wrap .mn-menu-wrap .sub-menu .sub-menu a {
      padding-left: 80px; }
    .mn-navigation-wrap .mn-menu-wrap .sub-menu .sub-menu .sub-menu a {
      padding-left: 110px; }
    .mn-navigation-wrap .mn-menu-wrap .sub-menu .sub-menu .sub-menu .sub-menu a {
      padding-left: 140px; }
    .mn-navigation-wrap .mn-menu-wrap .sub-menu .sub-menu .sub-menu .sub-menu .sub-menu a {
      padding-left: 170px; }
    .mn-navigation-wrap .mn-menu-wrap .current-menu-item > a,
    .mn-navigation-wrap .mn-menu-wrap .current_page_item > a {
      background: rgba(255, 255, 255, 0.2); }
    .mn-navigation-wrap .mn-menu-wrap li a {
      color: rgba(255, 255, 255, 0.8);
      padding: 10px 20px;
      display: block;
      list-style: none;
      text-decoration: none;
      line-height: 1.5; }
      .mn-navigation-wrap .mn-menu-wrap li a:hover {
        background: rgba(255, 255, 255, 0.3); }
  .mn-navigation-wrap.mn-dark .mn-logo-text a {
    color: #000; }
  .mn-navigation-wrap.mn-dark .mn-menu-wrap li a {
    color: rgba(0, 0, 0, 0.8); }
    .mn-navigation-wrap.mn-dark .mn-menu-wrap li a:hover {
      background: rgba(0, 0, 0, 0.3); }
  .mn-navigation-wrap.mn-dark .mn-menu-wrap .current-menu-item > a,
  .mn-navigation-wrap.mn-dark .mn-menu-wrap .current_page_item > a {
    background: rgba(0, 0, 0, 0.2); }

@media only screen and (max-width: 500px) {
  html {
    padding: 0 !important;
    margin: 0 !important;
    margin-top: 60px !important; }
    html body {
      padding: 0 !important;
      margin: 0 !important; }
    html.mn-open {
      overflow: hidden !important;
      background: #000;
      background: #dd3333; }
      html.mn-open body {
        overflow: hidden !important; }
      html.mn-open .mn-navigation-wrap {
        top: 0;
        left: 0;
        z-index: 10000;
        height: 100%;
        max-height: 100%;
        overflow-y: auto;
        background: #000;
        background: #dd3333; }
      html.mn-open .mn-menu-wrap {
        display: block; }
    html .mn-navigation-wrap {
      display: block; }
      html .mn-navigation-wrap.hidebar {
        max-height: 0; } }

---

欲了解更多详细信息，请查看

您应该真正开始使用谷歌chrome来检查这些内容，并为您自己制作css，以下内容是非常基本的内容。下面的内容需要放在样式表的底部

有两个问题，红色背景应用于html，因此请删除它，然后将width元素设置为所需的百分比值

@media only screen and (max-width: 700px){
   html.mn-open{
      background: none;
   }


   .mn-navigation-wrap{
       width: 50%; 
   }
}