css 下拉纳维

Posted 2021-05-13

  /** Main Navi Dropdown **/
  #nav-main {
    display: block;
    z-index: 10;
    position: relative;
    overflow: visible;
  }
  #nav-main ul {
    background: #007f3a;
    margin: 0;
    width: 100%;
  }
  #nav-main ul li {
    display: inline-block;
    text-transform: uppercase;
  }
  #nav-main ul li a, #nav-main ul li strong {
    display: block;
    color: #fff;
    font-size: 0.875em;
    text-decoration: none;
    margin: 0;
    line-height: 3.75em;
    padding: 0 1.25em;
    font-weight: 600;
  }
  #nav-main ul li a:hover,
  #nav-main ul li .active,
  #nav-main ul li .trail {
    color: #a2cbb3;
  }
  #nav-main ul .submenu {
    position: relative;
  }
  #nav-main ul li.submenu::before {
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    border-bottom: 20px solid #fff;
    content: "";
    position: absolute;
    bottom: -10px;
    left: 20%;
    margin-left: -10px;
    z-index: 999;
    display: none;
  }
  #nav-main ul li.submenu:hover::before {
    display: inline-block;
  }
  #nav-main ul a.submenu::after,
  #nav-main ul strong.submenu::after {
    font-family: "Font Awesome 5 Free";
    font-weight: 900;
    content: "\f107";
    padding: 0 0.5em;
  }
  #nav-main ul .level_2 {
    position: absolute;
    max-height: 0;
    transition: max-height 0.5s ease-in-out;
    width: 250px;
    z-index: 99;
    background: #fff;
    box-shadow: 1px 0 1px rgba(0, 0, 0, 0.3), -1px 0 1px rgba(0, 0, 0, 0.3), 0 1px 1px rgba(0, 0, 0, 0.3);
    overflow: hidden;
  }
  #nav-main ul .level_2 li {
    display: block;
  }
  #nav-main ul .level_2 a, #nav-main ul .level_2 strong {
    display: block;
    color: #858585;
    font-size: 0.875em;
    line-height: 40px;
    padding: 0 1.5em;
    font-weight: 600;
    border-bottom: 1px solid #cfcfcf;
  }
  #nav-main ul .submenu:hover .level_2 {
    max-height: 500px;
  }