/*侧边导航*/
body {
    overflow-x: hidden;
}
#sidebar {
    height: 100vh;
    transition: all 0.3s;
    background-color: #f8f9fa;
    border-right: 1px solid #dee2e6;
    display: flex;
    flex-direction: column;
}
#sidebar-content {
    overflow-y: auto;
    flex-grow: 1;
}
#content {
    height: 100vh;
    display: flex;
    flex-direction: column;
}
.content-body {
    flex-grow: 1;
    overflow-y: auto;
}
.sidebar-collapsed {
    width: 80px !important;
}
.sidebar-collapsed .nav-link-text {
    display: none;
}
.sidebar-collapsed .nav-link-first-char {
    display: inline !important;
}
.sidebar-expanded {
    width: 250px !important;
}
.sidebar-expanded .nav-link-first-char {
    display: none !important;
}
.nav-item {
    white-space: nowrap;
    position: relative;
}
.fixed-header {
    position: sticky;
    top: 0;
    background: white;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,.1);
}
.nav-link .arrow-icon {
    transition: transform 0.3s ease;
    display: inline-block;
}
.nav-link:not(.collapsed) .arrow-icon {
    transform: rotate(180deg);
}
.nav-link:hover, .nav-item .nav-link:hover {
    background-color: rgba(0,0,0,0.05);
}
.nav-item .nav-link.active:hover {
    background-color: #0d6efd;
}
.nav-pills .nav-link.active {
    background-color: #0d6efd;
}
.nav-link-first-char {
    display: none;
    width: 100%;
    text-align: center;
}
.sidebar-collapsed .nav-link {
    display: flex;
    justify-content: center;
    padding-left: 0;
    padding-right: 0;
}
/*侧边栏导航*/
@media (max-width: 768px) {
    #sidebar {
        width: 60px !important;
    }
    .nav-link-text {
        display: none;
    }
    .nav-link-first-char {
        display: inline !important;
        font-weight: bold;
    }
    .sidebar-expanded {
        width: 250px !important;
    }
    .sidebar-expanded .nav-link-text {
        display: inline;
    }
    .sidebar-expanded .nav-link-first-char {
        display: none !important;
    }
}