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

hr {
    border: none;
    /* 先清除默认边框 */
    border-top: 1px solid var(--border-color);
    /* 自定义线条样式 */
    margin: 2em 0;
    /* 上下间距 */
}

ul {
    list-style-type: none;
    padding-left: 0;
    margin: 0;
    /* 可选，清除上下外边距 */
}

/* 无表头表格 */
table:not(:has(thead th:not(:empty))) thead {
    display: none;
}

table:not(:has(thead th:not(:empty))) td {
    padding: 4px;
    vertical-align: top;
}
table:not(:has(thead th:not(:empty))) tr:hover {
    background-color: transparent;
}
/* a标签默认样式 */
a {
    color: var(--link-color);
    text-decoration: none;
    transition:
        color 0.2s,
        border-color 0.2s;
}

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

a:active {
    opacity: 0.8;
}

/* 标题默认样式 */
h1,
h2,
h3,
h4,
h5,
h6 {
    position:relative;
    line-height:3rem;
}
h1 { --tag: "#h1"; }
h2 { --tag: "#h2"; }
h3 { --tag: "#h3"; }
h4 { --tag: "#h4"; }
h5 { --tag: "#h5"; }
h6 { --tag: "#h6"; }

h1:hover::before,
h2:hover::before,
h3:hover::before,
h4:hover::before,
h5:hover::before,
h6:hover::before {
    position: absolute;
    bottom: 0;
    right: 0;
    color: color-mix(in srgb, var(--text-primary) 40%, transparent);
    font-size: 1rem;
    content: var(--tag);
}


/* 滚动条默认样式 */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

::-webkit-scrollbar-button {
    display: none;
}

::-webkit-scrollbar-thumb {
    background-image: var(--linear-001);
    border-radius: 5px;
}

.scroll {
    overflow-y: auto;
    overflow-x: hidden;
}

/* 让 Mermaid xyChart 的背景透明，继承页面背景色 */
.mermaid svg[aria-roledescription="xychart"] {
    background-color: var(--bg-content);
}

/* 隐藏 Mermaid 内部的白色背景矩形 */
.mermaid svg[aria-roledescription="xychart"] g.main rect.background {
    opacity: 0;
}

/* 坐标轴文字颜色跟随主题 */
.mermaid svg[aria-roledescription="xychart"] g.bottom-axis text,
.mermaid svg[aria-roledescription="xychart"] g.left-axis text,
.mermaid svg[aria-roledescription="xychart"] g.chart-title text,
.mermaid svg[aria-roledescription="pie"] g text.pieTitleText,
.mermaid svg[aria-roledescription="pie"] g g text {
    fill: var(--text-primary) !important;
}

/* 坐标轴线条颜色 */
.mermaid svg[aria-roledescription="xychart"] g.bottom-axis path,
.mermaid svg[aria-roledescription="xychart"] g.left-axis path {
    stroke: var(--border-color) !important;
}

/* 网格线颜色 */
.mermaid svg[aria-roledescription="xychart"] g.plot line {
    stroke: var(--border-color) !important;
}

/* 标题颜色 */
.mermaid svg[aria-roledescription="xychart"] text.chart-title {
    fill: var(--text-primary) !important;
}

/* ===== 主题变量：亮色模式（默认） ===== */
:root,
[data-theme="light"] {
    --tool-height: 40px;
    --h1-height: 42px;
    --catalog-width: 360px;
    --anim-catalog-width: calc(-1 * var(--catalog-width));
    --linear-001: linear-gradient(
        45deg,
        white 0%,
        deeppink 40%,
        skyblue 60%,
        white 100%
    );
    --green-01: #3da33d;
    /* a标签 */
    --link-color: #0366d6;
    --link-hover-color: #0245a0;
    /* 背景色 */
    --bg-body: #e6e6e6;
    --bg-catalog: #ffffff;
    --bg-content: #ffffff;
    --bg-toolbar: #f7f7f7;
    --bg-hover: #20252329;
    --bg-table-stripe: #f8f9fc;
    --bg-table-hover: #eef2ff;
    --bg-blockquote: linear-gradient(135deg, #eef3fb, #f8f9fa);
    --bg-code-summary: #3a3c40;
    --bg-code-block: #222222;
    --bg-checkbox: #ffffff;

    /* 文字色 */
    --text-primary: #22272e;
    --text-secondary: #444444;
    --text-link: #000000;
    --text-link-active: #3da33d;
    --text-code: #f7f7f7;
    --text-table-header: #ffffff;
    --text-toc-hover: #3da33d;

    /* 边框/分割线 */
    --border-color: #d0d0d0;
    --border-table: #e8e8e8;
    --border-blockquote: #d6e4f0;
    --border-code: #453e3e;
    --border-table-header: #5a6fd6;
    --border-color-code: #d0d0d0;

    /* 阴影 */
    --shadow-content: 0 0 2px gray;
    --shadow-blockquote-hover: 0 4px 16px rgba(74, 144, 217, 0.12);

    /* 列表标记色 */
    --list-marker: #4a90d9;
    --list-marker-hover: linear-gradient(135deg, #aa1717, #e51313);
    --list-number-bg: #4a90d9;
    --list-number-shadow: #eef3fb;

    /* 滚动条 */
    --scrollbar-track: #f0f0f0;
    --scrollbar-thumb: #868585;

    /* 其他 */
    --error-bg: azure;
}

/* ===== 主题变量：暗色模式 ===== */
[data-theme="dark"] {
    --tool-height: 40px;
    --h1-height: 42px;
    --catalog-width: 340px;
    --anim-catalog-width: calc(-1 * var(--catalog-width));
    --linear-001: linear-gradient(
        45deg,
        #2a2a2a 0%,
        #6b2a35 40%,
        #2d5f8a 60%,
        #2a2a2a 100%
    );
    --green-01: #5ec95e;
    /* a标签 */
    --link-color: #3a7bd5;
    --link-hover-color: #79b8ff;
    /* 背景色 — 中性深灰，去掉蓝色调 */
    --bg-body: #1a1a1a;
    --bg-catalog: #222222;
    --bg-content: #252525;
    --bg-toolbar: #222222;
    --bg-hover: rgba(255, 255, 255, 0.06);
    --bg-table-stripe: #222222;
    --bg-table-hover: #2a2a2a;
    --bg-blockquote: linear-gradient(135deg, #252525, #222222);
    --bg-code-summary: #1e1e1e;
    --bg-code-block: #1a1a1a;
    --bg-checkbox: #252525;

    /* 文字色 — 暖白，不刺眼 */
    --text-primary: #d4d4d4;
    --text-secondary: #a8a8a8;
    --text-link: #c5c8d4;
    --text-link-active: #5ec95e;
    --text-code: #d4d4d4;
    --text-table-header: #e0e0e0;
    --text-toc-hover: #5ec95e;

    /* 边框/分割线 — 中性灰 */
    --border-color: #333333;
    --border-table: #333333;
    --border-blockquote: #333333;
    --border-code: #333333;
    --border-table-header: #444444;
    --border-color-code: #4a4a4a;
    /* 阴影 */
    --shadow-content: 0 0 4px rgba(0, 0, 0, 0.4);
    --shadow-blockquote-hover: 0 4px 16px rgba(0, 0, 0, 0.3);

    /* 列表标记色 */
    --list-marker: #3a7bd5;
    --list-marker-hover: linear-gradient(135deg, #c0392b, #e74c3c);
    --list-number-bg: #3a7bd5;
    --list-number-shadow: #1a1a1a;

    /* 滚动条 */
    --scrollbar-track: #1a1a1a;
    --scrollbar-thumb: #4a4a4a;

    /* 其他 */
    --error-bg: #222222;
}

/* ===== 全局变量过渡动画 ===== */

.catalog li a,
.catalog li .toc-item-wrapper,
.theme-toggle,
.content a,
.code-summary,
.code-block,
.toc-toggle,
.toolBar {
    transition:
        background-color 0.3s ease,
        color 0.3s ease,
        border-color 0.3s ease,
        box-shadow 0.3s ease;
}

/* 排除不需要过渡的元素（如动画中的目录） */
.anim-catalog-to,
.anim-catalog-back {
    transition: none !important;
}

.red {
    background-color: red;
}

.green {
    background-color: green;
}

.pink {
    background-color: pink;
}

.gray {
    background-color: gray;
}

body {
    height: auto;
    background-color: var(--bg-body);
    color: var(--text-primary);
    overflow: hidden;
}

.container {
    width: 100%;
    height: calc(100vh - var(--tool-height));
    display: flex;
    flex-wrap: wrap;
}

.catalog li a {
    display: inline-block;
    text-decoration: none;
    color: var(--text-link);
    width: 100%;
    height: 100%;
    font-size: small;
}

.catalog li .toc-item-wrapper:hover a {
    color: var(--text-link-active);
}

.catalog li .toc-item-wrapper:hover {
    background-color: var(--bg-hover);
}

.content-box {
    display: flex;
    width: 100%;
    height: 100%;
    position: relative;
    background-color: var(--bg-body);
}

.active a {
    color: var(--text-link-active) !important;
}

.catalog {
    background-color: var(--bg-catalog);
    height: 100%;
    width: var(--catalog-width);
    border-right: 1px solid var(--border-color);
    position: absolute;
    top: 0;
    z-index: 1000;
    padding: 1rem 0.2rem 1rem 1.4rem;
}

.scroll-smooth {
    scroll-behavior: smooth;
}

.content-article {
    display: flex;
    justify-content: center;
    width: 100%;
    height: 100%;
}

.content {
    background-color: var(--bg-content);
    height: 100%;
    width: 50%;
    display: flex;
    flex-direction: column;
    font-size: medium;
    line-height: 1.8rem;
    color: var(--text-primary);
}

img {
    max-width: 100%;
    height: auto;
}

img[height] {
    height: attr(height px);
}

.hide {
    display: none;
}

/* ===== 工具栏 ===== */
.toolBar {
    display: flex;
    width: 100%;
    height: var(--tool-height);
    border-bottom: 1px solid var(--border-color);
    background-color: var(--bg-toolbar);
    padding: 0px 10px;
    z-index: 1000;
}

.toolBar-left,
.toolBar-right,
.toolBar-center {
    display: flex;
    align-items: center;
    width: 100%;
    height: 100%;
}

.anim-catalog-to,
.anim-catalog-back {
    animation-duration: 0.15s;
    animation-fill-mode: forwards;
    animation-name: catalog-to;
}

.anim-catalog-back {
    animation-direction: reverse;
}

#menu {
    cursor: pointer;
    padding: 0.4rem;
    border-radius: 10%;
    color: var(--text-primary);
}

#menu:hover {
    background-color: rgba(111, 111, 111, 0.24);
}

@keyframes catalog-to {
    0% {
        transform: translateX(0px);
    }

    100% {
        transform: translateX(var(--anim-catalog-width));
    }
}

.toolBar-right-group1 {
    width: 100%;
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
}

/* ===== 暗色模式切换按钮 ===== */
.theme-toggle {
    position: relative;
    width: 44px;
    height: 24px;
    border-radius: 12px;
    background-color: var(--border-color);
    border: none;
    cursor: pointer;
    padding: 0;
    flex-shrink: 0;
    transition: background-color 0.3s ease;
}

.theme-toggle:hover {
    background-color: var(--border-table-header);
}

.theme-toggle::before {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background-color: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition:
        transform 0.3s ease,
        background-color 0.3s ease;
}

[data-theme="dark"] .theme-toggle::before {
    transform: translateX(20px);
    background-color: #f5c542;
}

/* 太阳和月亮图标 */
.theme-toggle .icon-sun,
.theme-toggle .icon-moon {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 12px;
    line-height: 1;
    transition: opacity 0.3s ease;
}

.theme-toggle .icon-sun {
    left: 5px;
    color: #f5c542;
    opacity: 1;
}

.theme-toggle .icon-moon {
    right: 5px;
    color: #a0a8b8;
    opacity: 0.5;
}

[data-theme="dark"] .theme-toggle .icon-sun {
    opacity: 0.5;
}

[data-theme="dark"] .theme-toggle .icon-moon {
    opacity: 1;
}

/* ===== 表格 ===== */
table:not(.hljs-ln) {
    width: 100%;
    border-collapse: collapse;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    font-size: 0.92rem;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

table:not(.hljs-ln) th {
    background: var(--border-table-header);
    color: var(--text-table-header);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    letter-spacing: 0.5px;
    border: 1px solid var(--border-table);
}

table:not(.hljs-ln) td {
    padding: 11px 16px;
    text-align: left;
    border: 1px solid var(--border-table);
    transition: background-color 0.2s ease;
    color: var(--text-primary);
}

table:not(.hljs-ln) tr:nth-child(even) {
    background-color: var(--bg-table-stripe);
}

table:not(.hljs-ln) tr:hover {
    background-color: var(--bg-table-hover);
}

/* ===== 代码块 ===== */

.code-details {
    border: 1px solid var(--border-color-code);
    border-radius: 6px;
    background-color: initial;
    contain: content;
    will-change: contents;
    margin-bottom: 1rem;
}

/* 折叠状态 */
.code-details:not([open]) .pre {
    content-visibility: hidden;
}

/* 未折叠状态 */
.code-details[open] .pre {
    content-visibility: 9999px;
}

.code-summary {
    position: sticky;
    top: -1rem;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 10px;
    cursor: pointer;
    user-select: none;

    border-bottom: 1px solid #85878775;
    border-radius: 6px;
}

.code-details[open] .code-summary {
    border-radius: 6px 6px 0px 0px !important;
}

summary::marker {
    content: "";
}

.code-block {
    display: block;
    overflow-x: scroll;
    white-space: pre;
}

.code-block::-webkit-scrollbar {
    height: 8px;
}

.code-block::-webkit-scrollbar-thumb {
    background: var(--linear-001);
    border-radius: 5px;
}

.code-block::-webkit-scrollbar-track {
    background: transparent;
    border-radius: 5px;
}

.code-block::-webkit-scrollbar-thumb:hover {
    background-image: var(--linear-001);
    cursor: pointer;
}

.mermaid {
    padding: 10px 0px;
}

.active {
    color: #0eb340 !important;
}

/* ===== 有序列表 ===== */
.content ol {
    counter-reset: list-counter;
    padding-left: 0;
    margin: 1.5em 0;
    position: relative;
}

.content ol::before {
    content: "";
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--list-marker), #a8d0f5);
    border-radius: 1px;
}

.content ol > li {
    counter-increment: list-counter;
    list-style: none;
    position: relative;
    padding: 12px 14px 12px 48px;
    margin-bottom: 4px;
    color: var(--text-primary);
}

.content ol > li::before {
    content: counter(list-counter);
    position: absolute;
    left: 4px;
    width: 24px;
    height: 24px;
    line-height: 24px;
    text-align: center;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: var(--list-number-bg);
    border-radius: 50%;
    box-shadow: 0 0 0 4px var(--list-number-shadow);
    z-index: 1;
}

.content ol > li::after {
    content: "";
    position: absolute;
    left: 48px;
    top: 0;
    bottom: 0;
    width: 0;
    border-left: 1px dashed var(--border-table);
}

/* ===== 无序列表 ===== */
.content ul:not(.contains-task-list) {
    padding-left: 0;
    margin: 0.5em 0;
}

.content ul:not(.contains-task-list) > li {
    list-style: none;
    position: relative;
    padding-left: 2rem;
    border-radius: 8px;
    color: var(--text-primary);
}

.content ul:not(.contains-task-list) li + li {
    margin-top: 0.2em;
}

.content ul:not(.contains-task-list) > li:hover::before {
    background: var(--list-marker-hover);
}

.content ul:not(.contains-task-list) > li::before {
    content: "";
    position: absolute;
    left: 14px;
    top: 0.7em;
    /* 改为顶部偏移，与文字顶部对齐 */
    width: 8px;
    height: 8px;
    background: linear-gradient(135deg, var(--list-marker), #357abd);
    border-radius: 2px;
    transform: rotate(45deg);
    /* 只保留旋转，去掉 translateY */
}

/* ===== 文本引用 ===== */
.content blockquote {
    margin: 1.2em 0;
    padding: 14px 18px 14px 48px;
    background: var(--bg-blockquote);
    border: 1px solid var(--border-blockquote);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.95em;
    position: relative;
    transition: box-shadow 0.2s;
}

.content blockquote:hover {
    box-shadow: var(--shadow-blockquote-hover);
}

.content blockquote::before {
    content: "i";
    position: absolute;
    left: 14px;
    top: 14px;
    width: 22px;
    height: 22px;
    line-height: 22px;
    text-align: center;
    font-size: 13px;
    font-weight: 700;
    font-style: italic;
    font-family: Georgia, serif;
    color: #fff;
    background: var(--list-marker);
    border-radius: 50%;
}

.content blockquote p {
    margin: 0.4em 0;
    color: var(--text-primary);
}

.content blockquote p:first-child {
    margin-top: 0;
}

.content blockquote p:last-child {
    margin-bottom: 0;
}

/* ===== 任务清单 ===== */
.task-list-item-checkbox {
    accent-color: var(--list-marker);
    width: 16px;
    height: 16px;
    cursor: pointer;
    background-color: var(--bg-checkbox);
}

.task-list-item-checkbox:checked {
    accent-color: #0eb340;
}

/* ===== 响应式 ===== */
@media (max-width: 2400px) {
    .content {
        height: 100%;
        width: 50%;
        padding: 1rem 3.2rem 4rem;
    }
}

@media (max-width: 1199px) {
    .content {
        height: 100%;
        width: 80%;
        padding: 1rem 2.2rem 4rem;
    }
}

@media (max-width: 575px) {
    .content {
        height: 100%;
        width: 100%;
        padding: 1rem 1.2rem 4rem;
    }

    .catalog {
        width: 100%;
    }

    @keyframes catalog-to {
        0% {
            transform: translateX(0%);
        }

        100% {
            transform: translateX(-100%);
        }
    }
}

/* ===== 折叠按钮 ===== */
.catalog li {
    position: relative;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    text-align: left;
    display: flex;
    align-items: self-start;
    flex-direction: column;
}

.toc-item-wrapper {
    display: inline-flex;
    align-items: center;
    padding: 4px 6px;
    border-radius: 6px;
    width: 100%;
}

.toc-toggle {
    position: absolute;
    left: -10px;
    top: 1px;
    display: inline-block;
    width: 18px;
    cursor: pointer;
    color: #999;
    font-size: 12px;
    user-select: none;
    transition: color 0.2s;
    flex-shrink: 0;
}

.toc-toggle:hover {
    color: #0366d6;
}

.catalog ul ul {
    padding-left: 1rem;
    width: 100%;
}

.toc-toggle::before {
    content: "▾";
    cursor: pointer;
    font-size: 16px;
}

li.collapsed .toc-toggle::before {
    content: "▸";
    font-size: 16px;
}

li.collapsed > ul {
    display: none;
}

/* 1. 重置插件生成的表格容器 */
.hljs-ln {
    border-collapse: collapse;
    border-spacing: 0;
    width: 100%;
    margin: 0;
    background: transparent;
    /* 防止表格背景遮挡代码块背景 */
    tab-size: 5;
    line-height: 1.5;
}

/* 2. 清除单元格默认样式 */
.hljs .hljs-ln td,
.hljs .hljs-ln tr {
    border: none;
    padding: 0;
    margin: 0;
    background: transparent;
    vertical-align: top;
    /* 关键：防止行号与代码垂直不对齐 */
}

/* 3. 代码行号列样式 */
.hljs .hljs-ln .hljs-ln-numbers {
    text-align: right;
    color: #6e7681;
    /* 行号颜色，可根据暗色模式调整 */
    user-select: none;
    /* 防止复制代码时选中行号 */
    width: 1px;
    /* 固定行号列宽度 */
    display: table-cell;
    border-right: 1px solid #44475a4f;
    padding: 0px 4px;
    color: #6272a4;
    /* 行号颜色（偏蓝灰，类似 VS Code） */
    text-align: right;
    user-select: none;
}

/* 4. 代码左右间距 */
.hljs .hljs-ln .hljs-ln-code {
    padding: 0px 6px;
}

/* 5. 控制隐藏代码行号 */
.hide-line-numbers .hljs-ln .hljs-ln-numbers {
    display: none;
}

/* 
            代码渲染工具栏
        */
.code-number-btn {
    background: transparent;
    border: 0px;
    position: relative;
    width: 32px;
    height: 32px;
    /* 清除内部文字基线干扰 */
    font-size: 0;
    cursor: pointer;
}

.code-number-btn::before {
    content: "\f785";
    color: #0eb340;
    font-family: "Font Awesome 6 Brands";
    cursor: pointer;
    font-size: 20px;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.hide-line-numbers .code-number-btn::before {
    color: #9d9f9e;
}

/* ===== 脚注悬浮组件样式 ===== */
.footnote-popover {
    position: absolute;
    z-index: 9999;
    min-width: 180px;
    padding: 12px 16px;
    background: var(--bg-content);
    border: 1px solid var(--border-color);
    border-radius: 0 8px 8px 8px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    font-size: 14px;
    line-height: 1.6;
    opacity: 0;
    transform: translateY(4px);
    transition:
        opacity 0.2s,
        transform 0.2s;
    pointer-events: none;
    overflow: visible;
    /* ← 外层改为 visible，允许箭头超出 */
}

/* 新增：内层负责滚动 */
.popover-content {
    max-width: 60vw;
    max-height: 80vh;
    /* 按需调整最大高度 */
    overflow-y: auto;
}

.footnote-popover.visible {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.footnote-popover::before {
    content: "";
    /* ← 修正：原来是 "8"，应为空字符串 */
    position: absolute;
    top: -6px;
    left: 20px;
    width: 10px;
    height: 10px;
    background: var(--bg-content);
    border-top: 1px solid var(--border-color);
    border-left: 1px solid var(--border-color);
    transform: rotate(45deg) translate(-13px, 13px);
    z-index: 1;
}

/* 隐藏原始脚注区域 和脚注线*/
.footnotes-sep,
.footnotes {
    display: none;
}

/* 脚注引用上标样式 */
.footnote-ref a {
    color: #1a73e8;
    text-decoration: none;
    cursor: pointer;
}

.footnote-ref a:hover {
    text-decoration: underline;
}

#loading-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 200px;
    height: auto;
}

/* dialog 容器 */
#loading {
    position: fixed;
    top: 10%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin: 0;
    border: none;
    border-radius: 8px;
    background-color: transparent;
    outline: none;
    padding: 0;

    /* 关键：固定尺寸 + flex 居中 */
    width: 300px;
    height: 300px;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* 遮罩层 */
#loading::backdrop {
    background: rgba(0, 0, 0, 0.358);
}

/* 加载条 */
.loader {
    width: 40px;
    height: 40px;
    border: 4px solid #e0e0e0;
    border-top-color: #357abd;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

#loading:not([open]) {
    display: none;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.language-select {
    position: relative;
    display: inline-block;
    min-width: 80px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    font-size: 14px;
    color: var(--text-primary);
}

/* 触发器（胶囊形状） */
.language-trigger {
    padding: 4px 1rem;
    background-color: var(--bg-blockquote);
    border-radius: 999px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: opacity 0.2s;
    user-select: none;
}

.language-trigger:hover {
    opacity: 0.8;
}

.language-trigger .arrow {
    font-size: 10px;
    transition: transform 0.2s;
}

.language-select.open .arrow {
    transform: rotate(180deg);
}

/* 下拉面板（可完全自定义） */
.language-dropdown {
    position: absolute;
    top: calc(100% + 6px);
    left: 50%;
    transform: translateX(-50%);
    background-color: var(--bg-content);
    border-radius: 12px;
    padding: 4px 0;
    min-width: 120px;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
    opacity: 0;
    visibility: hidden;
    transition:
        opacity 0.2s,
        visibility 0.2s;
    z-index: 999;
}

.language-select.open .language-dropdown {
    opacity: 1;
    visibility: visible;
}

.language-dropdown div {
    padding: 8px 16px;
    cursor: pointer;
    text-align: center;
    transition: background 0.15s;
}

.language-dropdown div:hover {
    background: var(--bg-hover);
}