html,
body {
  width: 100%;
  height: 100%;
  font: 100%/1.4em 'Calibre Light', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  margin: 0 auto;
  color: #222;
  -webkit-text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
}

body,
.panel {
  background-color: #fff;
}

.menu {
  background-color: #EDEDED;
}

a {
  color: #4B5;
  text-decoration: none;
}

.panel {
  text-align: center;
  padding-top: 5px;
  min-height: 100%;
}

/*侧边栏按钮*/
.btn-hamburger {
  cursor: pointer;
  width: 40px;
  height: 40px;
  border: none;
  position: absolute;
  top: 15px;
  left: 10px;
  outline: none;
}

.btn-hamburger img {
  width: 40px;
  height: 40px;
}

/*中屏幕*/
@media all and (min-width:40em) {
  .btn-hamburger {
    top: 20px;
    left: 30px;
  }
}

.menu,
.slideout-menu {
  position: fixed;
  left: 0;
  top: 0;
  bottom: 0;
  right: 0;
  z-index: 0;
  width: 290px;
  overflow-y: scroll;
  -webkit-overflow-scrolling: touch;
  display: none;
}

.panel,
.slideout-panel {
  position: relative;
  z-index: 1;
}

.slideout-open,
.slideout-open body {
  overflow: hidden;
}

.slideout-open .slideout-menu {
  display: block;
}