v3.1.25 按 DEL 删除行时，意外出现 css 样式代码

应该是这串

/* ☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘ 标题提示符样式 ☘ */ .h1 > :first-child::before { content: "Ⅰ"; font-size: 8px; font-family: "ITC Galliard Std"!important; position: absolute; left: -4px; top: 8px; }

作者：syuer9528
链接： v3.1.25 按 DEL 删除行时，意外出现 css 样式代码 - syuer9528 的回帖
来源：链滴
协议：CC BY-SA 4.0 https://creativecommons.org/licenses/by-sa/4.0/

好了，找到问题了，是代码片断的问题。代码片断关了就 OK 了。我回头排查一下代码片断。

/* 文件名（总标题）：
用个鲜艳的颜色当作标题 再加个底边框以和正文分隔 */
.protyle-title__input {
    color: green;
    /*border-bottom: 1px solid white;*/
    font-family: "Noto Sans CJK SC Black";
    font-size: 32px;
    text-align: center;
}

/*H1-H6标题基本样式*/

.protyle-wysiwyg .h1,
.protyle-wysiwyg h1,
.protyle-wysiwyg .h2,
.protyle-wysiwyg h2,
.protyle-wysiwyg .h3,
.protyle-wysiwyg h3,
.protyle-wysiwyg .h4,
.protyle-wysiwyg h4,
.protyle-wysiwyg .h5,
.protyle-wysiwyg h5,
.protyle-wysiwyg .h6,
.protyle-wysiwyg h6 {
    padding-top: 0 !important;
    padding-bottom: 0 !important;
    padding-right: 0 !important;
    padding-left: 8px;
    line-height: 1.5;
}

.protyle-wysiwyg .h1,
.protyle-wysiwyg h1 {
    font-family: "Noto Sans CJK SC Black";
    font-size: 32px;
    margin: 0 0 0 -48px !important;
}

.protyle-wysiwyg .h2,
.protyle-wysiwyg h2 {
    margin: 0;
    font-family: "Noto Serif CJK SC Black";
    font-size: 24px;
    margin: 0 0 0 -32px !important;
}

.protyle-wysiwyg .h3,
.protyle-wysiwyg h3 {
    font-family: "楷体";
    font-size: 16px;
    margin: 0 0 0 -16px !important;
}

.protyle-wysiwyg .h4,
.protyle-wysiwyg h4 {
    font-family: "仿宋";
    font-size: 16px;
    margin: 0 0 0 0 !important;
}

.protyle-wysiwyg .h5,
.protyle-wysiwyg h5 {
    font-family: "仿宋";
    font-size: 16px;
    margin: 0 0 0 0 !important;
}

.protyle-wysiwyg .h6,
.protyle-wysiwyg h6 {
    font-family: "仿宋";
    font-size: 16px;
    margin: 0 0 0 0 !important;
}

/* ☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘ 标题提示符样式 ☘ */

.h1 > :first-child::before {
    content: "Ⅰ";
    font-size: 8px;
    font-family: "ITC Galliard Std"!important;
    position: absolute;
    left: -4px;
    top: 8px;
}

.h2 > :first-child::before {
    content: "Ⅱ";
    font-size: 8px;
    font-family: "ITC Galliard Std";
    position: absolute;
    left: -4px;
    top: 6px;
}

.h3 > :first-child::before {
    content: "Ⅲ";
    font-size: 8px;
    font-family: "ITC Galliard Std";
    position: absolute;
    left: -4px;
    top: 6px;
}

.h4 > :first-child::before {
    content: "Ⅳ";
    font-size: 8px;
    font-family: "ITC Galliard Std";
    position: absolute;
    left: -4px;
    top: 6px;
}

.h5 > :first-child::before {
    content: "Ⅴ";
    font-size: 8px;
    font-family: "ITC Galliard Std";
    position: absolute;
    left: -4px;
    top: 6px;
}

.h6 > :first-child::before {
    content: "Ⅵ";
    font-size: 8px;
    font-family: "ITC Galliard Std";
    position: absolute;
    left: -4px;
    top: 6px;
}


/* ☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘☘ */

/* 正文字体 */
.b3-typography:not(.b3-typography--default),
.protyle-wysiwyg,
.protyle-title {
    font-family: "宋体", var(--b3-font-family-protyle);
    font-weight: 300;
}


/* 引用链接 */
.protyle-wysiwyg [data-node-id] span[data-type~=block-ref]:not(.av__celltext),
.protyle-wysiwyg [data-node-id] span[data-type~=file-annotation-ref] {
    color: red !important;
    font-weight: 500;
    border: none !important;
}

.protyle-wysiwyg [data-node-id] span[data-type~="block-ref"]:hover,
.protyle-wysiwyg [data-node-id] span[data-type~="file-annotation-ref"]:hover {
    color: hsl(201, 17%, 70%);
    text-decoration-line: underline;
}

/* 浮评锚：上加线 */
.protyle-wysiwyg span[data-type~=inline-memo] {
    border-top: 2px double yellow !important;
    text-decoration: none;
}

/* 高亮 */
.protyle-wysiwyg span[data-type~=mark],
.protyle-wysiwyg mark {
    background: yellow;
    color: black;
}

/* 图片固定宽度 */
.protyle-wysiwyg [data-node-id] .img:not([style]) img:not([style~="height:"]):not([style~="width:"]) {
    width: 1000px;
}



/* 超级块
以下样式参考 StarDust主题
*/
.protyle-wysiwyg [data-node-id].sb {
    background-color: hsl(202deg 28% 30%);
    border-radius: 0.4em;
    padding: 0.1em 0.2em 0.1em 0.3em;
    margin-bottom: 0.6em;
}


/* 光标颜色：亮蓝色 */
.protyle-content {
    caret-color: #18f7ff;
}



/*气泡通知*/
.b3-snackbars {
    display: none;
    position: fixed;
    right: 24px;
    top: 64px;
}
​

不是代码片段的问题，下个版本应该会修复 Issue #14413 · siyuan-note/siyuan ，请到时候再试试

3.1.26 没修好，关联 Issue #14453 · siyuan-note/siyuan