孙向锦 / SunvoteEducation

  // Responsive utilities
  
  //
  // More easily include all the states for responsive-utilities.less.
  .responsive-visibility() {
    display: block !important;
    table&  { display: table; }
    tr&     { display: table-row !important; }
    th&,
    td&     { display: table-cell !important; }
  }
  
  .responsive-invisibility() {
    display: none !important;
  }