How to make AnkiDroid display serif fonts?

AnkiDroid (Android) Help
1

i have a template

<div class="wrap">
    <div class="sent-center">
        <div class="jpsentence" lang="ja">
            {{furigana:jpnExample}}
            {{^jpnExample}}
                <nokana>{{kanji:jpnExampleFurigana}}</nokana>
                {{^jpnExampleFurigana}}<b>
                    {{furigana:jpnTerm}}
                    {{^jpnTerm}}
                        <nokana>{{kanji:jpnTerm}}</nokana>
                    {{/jpnTerm}}
                </b>{{/jpnExampleFurigana}}
            {{/jpnExample}}
        </div>
    </div>
</div>

with CSS

@charset "UTF-8";
:root {
--bg-primary: #fcfaf7;
--bg-secondary: #f2ede4;
--text-main: #2b2b2b;
--text-dim: #76716a;
--text-highlight: #91AD70;
--border-color: #e5dfd3;
--border-light: #d1cbc0;
--link-color: #2e4452;
--link-hover: #1a2a35;
--accent-bg: #323232;
--accent-text: #fcfaf7;
--overlay-hover: rgba(0, 0, 0, 0.03);
}

.nightMode {
--bg-primary: #1c1c1c;
--bg-secondary: #141414;
--text-main: #e8e2d6;
--text-dim: #8c8579;
--text-highlight: #A3C9A8;
--link-color: #8fb1c9;
--link-hover: #b0c9db;
--accent-bg: #e8e2d6;
--accent-text: #1c1c1c;
--overlay-hover: rgba(255, 255, 255, 0.05);
--img-filter: grayscale(100%) contrast(110%) brightness(80%);
}

@media screen and (min-width: 900px) {

b,
strong {
font-weight: 300;
}
}

* {
box-sizing: border-box;
padding: 0;
margin: 0;
}

.card {
background-color: var(--bg-primary);
color: var(--text-main);
font-family: sans;
font-size: 24px;
text-align: left;
line-height: 1.4;
margin: 0 auto;
}

.card1 {
color: inherit;
}

.card2 .jpsentence ruby rt {
opacity: 0;
}

.card2 .jpsentence:hover ruby rt {
opacity: 1;
}

@media screen and (min-width: 820px) {
.card {
background-color: var(--bg-secondary);
display: flex;
justify-content: center;
}

.wrap {
width: 800px;
padding: 0 5px 0;
background-color: var(--bg-primary);
border-left: 1px solid var(--border-color);
border-right: 1px solid var(--border-color);
min-height: 100vh;
color: var(--text-main);
}

.wrap .wrap {
width: auto;
padding: 0;
min-height: 0;
border: 0;
}
}

hr {
margin: 2px 0;
clear: both;
border: 0;
border-top: 1px solid var(--border-color);
}

a {
color: var(--link-color);
}

a:hover {
color: var(--link-hover);
}

a.hint {
text-decoration: none;
text-align: center;
display: block;
}

nokana ruby rt {
opacity: 0;
font-size: 0;
display: none;
}

notext b,
notext strong {
background-color: var(--text-main);
color: transparent;
}

header {
display: flex;
clear: both;
}

header .tags {
border-radius: 0px 0px 3px 3px;
}

header>div:not(:last-child) {
margin-right: 3px;
}

.sent-center {
display: flex;
align-items: center;
justify-content: center;
flex-flow: column nowrap;
}

.jpsentence {
    font-family: "Noto Serif CJK JP", "Noto Serif JP", serif !important;
    font-size: 36px;
}

.jpsentence b,
.jpsentence strong {
color: var(--text-highlight);
}

.fside .jpsentence {
display: none;
}

div.ensentence>a.hint {
color: var(--text-dim);
font-size: 14px;
display: block;
border: 1px solid var(--border-light);
border-radius: 2px;
padding: 2px 10px;
margin: 4px 0;
}

.nightMode div.ensentence>a.hint {
border-color: var(--text-dim);
}

div.ensentence>a.hint:hover {
color: var(--text-main);
background-color: var(--overlay-hover);
}

.tags {
font-family: sans-serif;
text-align: center;
display: inline-block;
background-color: var(--accent-bg);
color: var(--accent-text);
font-weight: bold;
padding: 1px 4px;
margin: 0;
cursor: pointer;
border-radius: 2px;
font-size: 12px;
line-height: 14px;
}

/* AnkiDroid replay button */

.replaybutton {
margin: 0;
margin-right: 3px;
text-decoration: none;
}

.replaybutton span {
padding: 0;
font-size: 16px;
}

.replaybutton span svg {
fill: #fffaf0;
background: #333;
border-radius: 3px;
vertical-align: top;
min-width: 16px;
min-height: 16px;
}

/* PC replay button */

a.replay-button {
top: -0.125em;
position: relative;
margin: 0;
}

a.replay-button svg {
height: 1em;
width: 1em;
}

a.replay-button svg path {
fill: #fffaf0;
}

a.replay-button svg circle {
fill: #333;
}

footer {
font-size: 16px;
text-align: center;
}

footer>a {
text-decoration: none;
}

footer>a:after {
content: "·";
color: var(--text-highlight);
display: inline-block;
width: 6px;
}

footer>a:last-child:after {
content: "";
width: 0;
}

.notes {
font-size: 12px;
text-align: center;
}

.source {
font-size: 10px;
text-align: center;
}

.vocab {
margin-top: 16px;
}

.vocab div {
display: inline-block;
}

.vocab br {
display: none;
}

.vocab ol>li:after {
content: "・";
color: var(--text-dim);
}

.vocab ol>li:last-child:after {
content: "";
}

.images img {
display: block;
margin-left: auto;
margin-right: auto;
max-height: 200px; /* Limit height */
width: auto; /* Keep aspect ratio */
height: auto; /* Keep aspect ratio */
}

.production b,
.production strong {
visibility: hidden;
color: var(--text-highlight)
}

ul,
ol {
list-style-type: none;
display: inline;
margin: 0;
padding: 0;
}

.vocab ol>li {
display: inline;
}

.jpsentence ruby rt {
user-select: none;
}

How to make AnkiDroid display the “jpsentence” part in serif?

2

I have some instructions here: Reddit.

It includes some other things (randomization) which you can ignore.