body {
    padding-top: 56px;
    background-color: #F2F9F5; /* 设置背景颜色 */
}

.left-aligned {
    margin-left: auto;
}

.bg-dark {
    background-color: #343a40 !important;
}

.bg-hero {
    background-color: #45b06cff;
}

/* CALLOUT */
.bd-callout {
    padding: 1.25rem;
    margin-top: 1.25rem;
    margin-bottom: 1.25rem;
    border: 1px solid #e9ecef;
    border-left-width: .25rem;
    border-radius: .25rem
}

.bd-callout h4 {
    margin-bottom: .25rem
}

.bd-callout p:last-child {
    margin-bottom: 0
}

.bd-callout code {
    border-radius: .25rem
}

.bd-callout + .bd-callout {
    margin-top: -.25rem
}

.bd-callout-info {
    border-left-color: #5bc0de
}

.bd-callout-warning {
    border-left-color: #f0ad4e
}

.bd-callout-danger {
    border-left-color: #d9534f
}

.dropdown-toggle::after {
    display: none !important;
}

/* footer */
footer a {
    color: white;
    font-weight: bold;
    text-decoration: none;
}

footer a:hover {
    color: white;
    text-decoration: underline;
}