Dcat-Admin/resources/assets/dcat/sass/components/_menu.scss

.main-menu {
  .navbar-header {
    padding: 0.35rem 1rem 4.5rem;

    .navbar-brand {
      margin-top: 1.2rem;

      .logo-mini {
        display: none;
      }

      .logo-lg {
        color: $primary;
        font-weight: 600;
        letter-spacing: 0.01rem;
        font-size: 1.57rem;
        -webkit-animation: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1) 0s normal forwards 1 fadein;
        animation: 0.3s cubic-bezier(0.25, 0.8, 0.25, 1) 0s normal forwards 1 fadein;
      }

      img {
        display: inline-block;
        max-width: 45px;
        max-height: 40px;
        margin-top: -1px;
      }
    }

    .modern-nav-toggle {
      display: block;
      float: right;
      margin-top: 1px;
    }

    .nav-item {
      width: 100%;
      text-align: center;
    }

    .navbar-brand {
      display: inline-block;
      margin: 10px 0;
    }
  }
}

// 菜单
.main-menu.menu-shadow {
  box-shadow: $menu-shadow;
}

body.vertical-layout.vertical-menu-modern.menu-collapsed {
  .main-menu:not(.expanded) .navbar-header {
    width: 80px;
    padding: 0.35rem 15px;

    .logo-lg {
      display: none;
    }

    .logo-mini {
      display: inline-block;
    }
  }
}

body.vertical-layout.vertical-menu-modern.menu-expanded .main-menu .navigation > li > a > i:before {
  font-size: 1.3rem;
}