<style>

/* override code highlighter */
.token.operator, .token.entity, .token.url, .language-css .token.string, .style .token.string {
background-color: #ffffff00 !important;
}

.btn-default, .open-comments {
color: #74afcc !important;
background-color: #151c23 !important;
border-color: #001621 !important;
}

.btn-default:hover {
background-color: #333 !important;
color: #eee !important;
}

.alert-info {
margin-top: 10px;
color: #74afcc !important;
background-color: #001621 !important;
border-color: #001621 !important;
}

.alert-warning {
color: #ae976e !important;
background-color: #262000 !important;
border-color: #262000 !important;
}

.alert-success {
color: #6cae6d !important;
background-color: #071800 !important;
border-color: #071800 !important;
}

nav, .nav, .toolbar, .summary, .topbar, .dropdown-menu {
background-color: #151c23 !important;
color: #999 !important;
}

.navbar-nav a{
background-color: #151c23 !important;
color: #999 !important;
}

.navbar-nav a:hover, .community-button:hover {
background-color: #333 !important;
color: #eee !important;
}

.dropdown-menu > li > a{
color: #999 !important;
}

body {
background: #151c23 !important;
color: #888 !important;
}

table.part {
filter: invert(.9);
}

.markdown-body img {
background-color: #ffffff00 !important;
}

h1, h2 {
border-bottom: 1px solid #333 !important;
}

h1, h2, h3, h4, h5, h6, p {
font-family: serif;
font-weight: 500;
font-size: 100%;
}

h1.part:not(:first-of-type), h2.part {
margin-top: 70px;
}

a {
font-family: serif;
font-weight: 500;
font-size: 100%;
}

a:hover {
color: #eeeeee !important;
}

.active > a {
color: #eeeeee !important;
}

li {
font-family: serif;
font-weight: 500;
font-size: 100%;
}

b, strong {
font-family: "sans serif";
font-weight: 400;
font-size: 100%;
padding:0px 5px 0px 5px;
color: #acacac;
background-color: #373737;
margin: 5px;
border-radius: 5px;
}

blockquote.part {
font-weight: 300;
background-color: #160000;
color: #cccccc;
padding: 10px;
border-radius: 5px;
}
pre
{
background-color: #160000;
}
pre.part {
padding: 10px;
background-color: #160000;
color: #d5d5d5;
border: 1px;
border-radius: 10px;
}

/* manual img resize by alt */
img[alt="10"] {
width: 10%;
}
img[alt="20"] {
width: 20%;
}
img[alt="30"] {
width: 30%;
}
img[alt="40"] {
width: 40%;
}
img[alt="50"] {
width: 50%;
}
img[alt="60"] {
width: 60%;
}
img[alt="70"] {
width: 70%;
}
img[alt="80"] {
width: 80%;
}
img[alt="90"] {
width: 90%;
}

/* align center */
iframe {
display:block;
margin: 0 auto;
max-width: 768px;
border: 0;
}

</style>

> 學海無涯，思境無維；數乃六藝，理之始也。
> 或有一得足矣 [name=愚千慮]

$$
\require{newcommand}
\newcommand{\bmatrix}[1] {\begin{bmatrix}#1\end{bmatrix}}
\newcommand{\vmatrix}[1] {\begin{vmatrix}#1\end{vmatrix}}
$$