/*表头设置*/
  .navbar .navbar-nav .nav-item .nav-link:not(.btn) .material-icons {
    margin-top: -7px;
    top: 3px;
    position: relative;
    margin-right: 3px;
}

a .material-icons {
    vertical-align: middle;
}

/* 标题头下拉框 */
.dropdown-menu .dropdown-item:hover,
.dropdown-menu .dropdown-item:focus,
.dropdown-menu a:hover,
.dropdown-menu a:focus,
.dropdown-menu a:active {
    box-shadow: 0 4px 20px 0px rgba(0, 0, 0, 0.14), 0 7px 10px -5px rgba(33, 150, 243, 0.4);
    /* background-color: #2196F3;
    color: #FFFFFF; */
}

.dropdown-menu.show {
    display: block;
    opacity: 1;
    transform: scale(1);
}

.dropdown-menu {
    padding: 0.3125rem 0;
    border: 0;
    opacity: 0;
    transform: scale(0);
    transform-origin: 0 0;
    will-change: transform, opacity;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 2px 5px 0 rgba(0, 0, 0, 0.26);
}

.dropdown-menu .dropdown-item,
.dropdown-menu li>a {
    position: relative;
    width: auto;
    display: flex;
    flex-flow: nowrap;
    align-items: center;
    color: #333;
    font-weight: normal;
    text-decoration: none;
    font-size: .8125rem;
    border-radius: 0.125rem;
    margin: 0 0.3125rem;
    transition: all 150ms linear;
    min-width: 7rem;
    overflow: hidden;
    line-height: 1.428571;
    text-overflow: ellipsis;
    word-wrap: break-word;
}

.dropdown-item {
    clear: both;
    text-align: inherit;
    white-space: nowrap;
    background-color: transparent;
    border: 0;
}

/* 图标、文字与上下左右的距离 */
.dropdown-menu.dropdown-with-icons .dropdown-item {
    padding: 0.75rem 1.25rem 0.75rem 0.75rem;
}

/* 下拉框中图标与文字的设置 */
.dropdown-menu.dropdown-with-icons .dropdown-item .material-icons {
    vertical-align: middle;
    font-size: 24px;
    position: relative;
    margin-top: -4px;
    top: 1px;
    margin-right: 12px;
    opacity: .5;
}
.menu-text-lg {
    font-weight: normal;
    font-style: normal;
    font-size: 15px;
    color: #ffffff;
}

.menu-text {
    font-weight: normal;
    font-style: normal;
    font-size: 13px;
    color: #ffffff;
}

.menu-text-sg {
    font-weight: normal;
    font-style: normal;
    font-size: 20px;
    color: #ffffff;
}