/* ============================================================
 * KaiCMS 前台样式 —— 现代 · 明暗双主题 · 6 套主色
 * ============================================================ */

/* ---- 主色预设（后台可选） ---- */
:root, [data-accent="blue"]   { --pri: #2f5ee0; --pri-soft: #eaf0ff; --pri-deep: #1e3f9e; }
[data-accent="violet"]        { --pri: #7c3aed; --pri-soft: #f3ecff; --pri-deep: #5b21b6; }
[data-accent="teal"]          { --pri: #0d9488; --pri-soft: #e6fffa; --pri-deep: #0f766e; }
[data-accent="orange"]        { --pri: #ea580c; --pri-soft: #fff3ea; --pri-deep: #c2410c; }
[data-accent="rose"]          { --pri: #e11d48; --pri-soft: #ffeef2; --pri-deep: #be123c; }
[data-accent="green"]         { --pri: #16a34a; --pri-soft: #eafbf0; --pri-deep: #15803d; }

:root {
    --bg: #f6f7fa;
    --card: #ffffff;
    --line: #e8ebf2;
    --tx: #1b2233;
    --tx2: #6b7386;
    --tx3: #9aa1b5;
    --shadow: 0 4px 22px rgba(25, 40, 80, .06);
    --shadow-lg: 0 12px 34px rgba(25, 40, 80, .12);
    --r: 14px;
    --footer-bg-1: #101728;
    --footer-bg-2: var(--pri-deep);
    color-scheme: light;
}

/* ---- 暗色 ---- */
[data-theme="dark"] {
    --bg: #0e1220;
    --card: #171d30;
    --line: #262e45;
    --tx: #e8ecf6;
    --tx2: #9aa3bc;
    --tx3: #6d7690;
    --pri-soft: #20294a;
    --shadow: 0 4px 22px rgba(0, 0, 0, .3);
    --shadow-lg: 0 12px 34px rgba(0, 0, 0, .45);
    --footer-bg-1: #0a0e1a;
    --footer-bg-2: #131a30;
    color-scheme: dark;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
::selection { background: color-mix(in srgb, var(--pri) 25%, transparent); }
:focus-visible { outline: 2px solid var(--pri); outline-offset: 2px; border-radius: 4px; }
::-webkit-scrollbar { width: 9px; height: 9px; }
::-webkit-scrollbar-thumb { background: color-mix(in srgb, var(--tx3) 45%, transparent); border-radius: 99px; }
::-webkit-scrollbar-thumb:hover { background: var(--tx3); }
::-webkit-scrollbar-track { background: transparent; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: var(--bg); color: var(--tx); font-size: 15px; line-height: 1.75;
    transition: background .25s, color .25s;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
button { font-family: inherit; }

/* ============ 顶部导航 ============ */
.topbar {
    position: sticky; top: 0; z-index: 100;
    background: color-mix(in srgb, var(--card) 82%, transparent);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--line);
}
.topbar-inner {
    max-width: 1160px; margin: 0 auto; padding: 0 20px;
    display: flex; align-items: center; gap: 26px; height: 62px;
}
.brand { display: flex; align-items: center; gap: 10px; font-size: 17px; }
.brand-mark {
    width: 34px; height: 34px; border-radius: 10px;
    background: linear-gradient(135deg, var(--pri), color-mix(in srgb, var(--pri) 55%, #9ec1ff));
    color: #fff; display: inline-flex; align-items: center; justify-content: center;
    font-size: 16px; font-weight: 800; box-shadow: 0 4px 12px color-mix(in srgb, var(--pri) 40%, transparent);
}
.brand-logo { width: 34px; height: 34px; border-radius: 10px; object-fit: cover; }
.topnav { display: flex; gap: 4px; margin-left: auto; }
.topnav a {
    padding: 7px 13px; border-radius: 9px; color: var(--tx2); font-size: 14.5px; font-weight: 500;
    transition: all .18s;
}
.topnav a:hover { color: var(--pri); background: var(--pri-soft); }
.topnav a.is-cur { color: var(--pri); background: var(--pri-soft); font-weight: 600; }

/* 当前页高亮 / 草稿预览提示 */
.draft-chip {
    display: inline-block; background: #fef3c7; color: #92400e; border: 1px solid #fde68a;
    border-radius: 8px; padding: 2px 12px; font-size: 12px; font-weight: 600;
}
[data-theme="dark"] .draft-chip { background: #3a2e10; color: #fbbf24; border-color: #57451a; }
.topbar-acts { display: flex; gap: 6px; }
.tb-btn {
    width: 36px; height: 36px; border-radius: 10px; border: 1px solid var(--line);
    background: var(--card); color: var(--tx2); cursor: pointer;
    display: inline-flex; align-items: center; justify-content: center; transition: all .18s;
}
.tb-btn:hover { color: var(--pri); border-color: var(--pri); }
[data-theme="light"] .ico-moon { display: none; }
[data-theme="dark"] .ico-sun { display: none; }
html:not([data-theme="light"]):not([data-theme="dark"]) .ico-moon { display: none; }
@media (prefers-color-scheme: dark) {
    html:not([data-theme="light"]):not([data-theme="dark"]) .ico-sun { display: none; }
    html:not([data-theme="light"]):not([data-theme="dark"]) .ico-moon { display: inline; }
}

/* 搜索下拉 */
.search-drop { border-top: 1px solid var(--line); background: var(--card); }
.search-form {
    max-width: 1160px; margin: 0 auto; padding: 14px 20px;
    display: flex; gap: 10px;
}
.search-form input {
    flex: 1; padding: 11px 15px; border: 1.5px solid var(--line); border-radius: 11px;
    font-size: 14px; background: var(--bg); color: var(--tx); outline: none;
}
.search-form input:focus { border-color: var(--pri); }
.search-form button {
    padding: 0 26px; border: 0; border-radius: 11px; background: var(--pri);
    color: #fff; font-weight: 600; cursor: pointer;
}

/* ============ Hero ============ */
.hero {
    background:
        radial-gradient(600px 300px at 15% 0%, color-mix(in srgb, var(--pri) 14%, transparent), transparent),
        radial-gradient(500px 280px at 85% 100%, color-mix(in srgb, var(--pri) 10%, transparent), transparent),
        var(--card);
    border-bottom: 1px solid var(--line);
}
.hero-inner { max-width: 1160px; margin: 0 auto; padding: 56px 20px 48px; text-align: center; }
.hero h1 {
    font-size: clamp(26px, 4vw, 38px); font-weight: 800; letter-spacing: 1px;
    background: linear-gradient(120deg, var(--tx) 30%, var(--pri));
    -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}

/* 入场动画（尊重减少动效偏好） */
@media (prefers-reduced-motion: no-preference) {
    .post-card, .side-card, .archive-head, .single-head, .single-content, .tag-card, .link-card {
        animation: kai-rise .45s ease both;
    }
    .post-card:nth-child(2) { animation-delay: .05s; }
    .post-card:nth-child(3) { animation-delay: .1s; }
    .post-card:nth-child(4) { animation-delay: .15s; }
    @keyframes kai-rise {
        from { opacity: 0; transform: translateY(14px); }
        to { opacity: 1; transform: translateY(0); }
    }
}
.hero p { color: var(--tx2); margin-top: 10px; font-size: 15px; }

/* ============ 布局 ============ */
.site { min-height: 62vh; }
.layout {
    max-width: 1160px; margin: 0 auto; padding: 28px 20px 60px;
    display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 26px; align-items: start;
}
.layout.no-side { grid-template-columns: minmax(0, 1fr); }

/* ============ 文章卡片 ============ */
.post-card {
    display: flex; gap: 18px; background: var(--card); border: 1px solid var(--line);
    border-radius: var(--r); padding: 18px; margin-bottom: 16px; box-shadow: var(--shadow);
    transition: transform .18s, box-shadow .18s;
}
.post-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.post-cover {
    flex: 0 0 176px; align-self: stretch; min-height: 118px; border-radius: 10px;
    background-size: cover; background-position: center; background-color: var(--pri-soft);
    transition: background-size .5s ease;
}
.post-card:hover .post-cover { background-size: 114%; }
.post-body { min-width: 0; display: flex; flex-direction: column; }
.post-body h2 { font-size: 17.5px; line-height: 1.5; }
.post-body h2 a { transition: color .18s; }
.post-body h2 a:hover { color: var(--pri); }
.post-excerpt {
    color: var(--tx2); font-size: 13.5px; margin-top: 8px;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.post-meta {
    margin-top: auto; padding-top: 10px; display: flex; align-items: center; gap: 14px;
    color: var(--tx3); font-size: 12.5px; flex-wrap: wrap;
}
.meta-cat {
    color: var(--pri); background: var(--pri-soft); border-radius: 6px; padding: 1px 9px; font-weight: 600;
}
.meta-pin { color: #d97706; background: #fef3c7; border-radius: 6px; padding: 1px 9px; font-weight: 600; }
[data-theme="dark"] .meta-pin { background: #3a2e10; }

/* ---- 归档头 ---- */
.archive-head {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    padding: 26px 28px 22px; margin-bottom: 20px; box-shadow: var(--shadow);
    position: relative; overflow: hidden;
}
.archive-head::before {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
    background: linear-gradient(var(--pri), color-mix(in srgb, var(--pri) 40%, #fff));
}
.archive-type { color: var(--pri); font-size: 12.5px; font-weight: 700; letter-spacing: 2px; }
.archive-head h1 { font-size: 24px; margin-top: 6px; }
.archive-head p { color: var(--tx2); font-size: 13.5px; margin-top: 6px; }
.archive-count {
    position: absolute; right: 24px; top: 26px; color: var(--tx3); font-size: 12.5px;
    background: var(--bg); border-radius: 99px; padding: 3px 12px;
}

/* ============ 侧栏 ============ */
.sidebar { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 82px; }
.side-card { background: var(--card); border: 1px solid var(--line); border-radius: var(--r); padding: 18px; box-shadow: var(--shadow); }
.side-card h3 { font-size: 14.5px; margin-bottom: 12px; display: flex; align-items: center; gap: 8px; }
.side-card h3::before {
    content: ""; width: 4px; height: 14px; border-radius: 2px; background: var(--pri);
}
.side-list { list-style: none; }
.side-list li { display: flex; align-items: center; gap: 10px; padding: 7px 0; font-size: 13.5px; border-bottom: 1px dashed var(--line); }
.side-list li:last-child { border-bottom: 0; }
.side-list em {
    font-style: normal; width: 20px; height: 20px; border-radius: 6px; background: var(--bg);
    color: var(--tx3); font-size: 11.5px; display: inline-flex; align-items: center; justify-content: center; flex: 0 0 auto;
}
.side-list em.is-top { background: var(--pri); color: #fff; }
.side-list a { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; transition: color .15s; }
.side-list a:hover { color: var(--pri); }
.side-list .dot { width: 5px; height: 5px; border-radius: 50%; background: var(--tx3); flex: 0 0 auto; }
.side-empty { color: var(--tx3); font-size: 12.5px; }

/* 标签云上色：hsl(var(--h), …) 三档明度，暗色下提高透明度 */
.side-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.side-tags a {
    padding: 4px 12px; border-radius: 8px; font-size: 12.5px; font-weight: 500;
    background: hsl(var(--h) calc(72% - var(--tone) * 12%) calc(93% - var(--tone) * 8%));
    color: hsl(var(--h) 45% 32%);
    transition: transform .15s;
}
.side-tags a:hover { transform: translateY(-2px); }
[data-theme="dark"] .side-tags a {
    background: hsl(var(--h) 30% 20%);
    color: hsl(var(--h) 65% 72%);
}

/* ============ 分页 ============ */
.pager { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 26px; }
.pager a {
    min-width: 38px; height: 38px; padding: 0 10px; display: inline-flex; align-items: center; justify-content: center;
    background: var(--card); border: 1px solid var(--line); border-radius: 10px;
    font-size: 14px; color: var(--tx2); transition: all .15s;
}
.pager a:hover { border-color: var(--pri); color: var(--pri); }
.pager a.is-cur { background: var(--pri); border-color: var(--pri); color: #fff; font-weight: 600; }
.pager span { color: var(--tx3); align-self: center; }

/* ============ 文章详情 ============ */
/* width:100% 必须带上：grid 布局里 item 一旦 margin:auto 就不再 stretch，
 * 宽度会塌缩成内容宽（归档/短文页只剩一两百像素） */
.single-wrap { max-width: 820px; margin: 0 auto; width: 100%; }
/* v3.2.0 页面属性「全宽模板」：无侧栏时正文区加宽 */
.layout > .single-wrap:only-child { max-width: 1080px; }
.crumb { color: var(--tx3); font-size: 13px; margin-bottom: 14px; display: flex; gap: 8px; }
.crumb a:hover { color: var(--pri); }
.crumb i { font-style: normal; opacity: .6; }
.single-head {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    padding: 30px 34px 22px; box-shadow: var(--shadow);
}
.single-head h1 { font-size: clamp(22px, 3.4vw, 30px); line-height: 1.45; }
.single-meta {
    display: flex; gap: 18px; margin-top: 14px; color: var(--tx3); font-size: 13px; flex-wrap: wrap;
    border-top: 1px dashed var(--line); padding-top: 14px;
}
.single-content {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    padding: 30px 34px; margin-top: 16px; box-shadow: var(--shadow); font-size: 15.5px; line-height: 1.95;
}
.md-body h2, .md-body h3, .md-body h4 { margin: 26px 0 12px; line-height: 1.5; }
.md-body h2 { font-size: 21px; padding-left: 12px; border-left: 4px solid var(--pri); }
.md-body h3 { font-size: 17.5px; }
.md-body p { margin: 12px 0; }
.md-body ul, .md-body ol { padding-left: 26px; margin: 12px 0; }
.md-body li { margin: 5px 0; }
/* v3.3.0：Markdown 表格（GFM） */
.md-body .md-table-wrap { overflow-x: auto; margin: 16px 0; }
.md-body table { border-collapse: collapse; width: 100%; font-size: 14px; }
.md-body th, .md-body td { border: 1px solid rgba(120,130,160,.28); padding: 8px 13px; text-align: left; }
.md-body th { background: rgba(120,130,160,.1); font-weight: 600; white-space: nowrap; }
.md-body tbody tr:nth-child(even) { background: rgba(120,130,160,.05); }
.md-body blockquote {
    border-left: 4px solid var(--pri); background: var(--pri-soft); border-radius: 0 10px 10px 0;
    padding: 12px 16px; color: var(--tx2); margin: 14px 0;
}
.md-body pre {
    background: #0f172a; color: #e2e8f0; border-radius: 12px; padding: 16px 18px;
    overflow-x: auto; margin: 16px 0; font-size: 13.5px; line-height: 1.7;
}
/* 代码高亮配色（代码块恒为深底，单套色板） */
.md-body pre .c-kw  { color: #c792ea; }
.md-body pre .c-str { color: #a5d6a7; }
.md-body pre .c-num { color: #f78c6c; }
.md-body pre .c-com { color: #64748b; font-style: italic; }

/* ---- 目录 TOC ---- */
.toc {
    background: var(--bg); border: 1px solid var(--line); border-radius: 12px;
    padding: 12px 18px; margin-bottom: 20px; font-size: 13.5px;
}
.toc summary {
    cursor: pointer; font-weight: 700; color: var(--pri); user-select: none; list-style: none;
    display: flex; align-items: center; gap: 6px;
}
.toc summary::after { content: "▾"; font-size: 11px; transition: transform .2s; }
.toc:not([open]) summary::after { transform: rotate(-90deg); }
.toc ul { list-style: none; margin: 10px 0 4px; padding: 0; }
.toc li.lv3 { padding-left: 18px; }
.toc li a {
    display: block; padding: 4px 8px; border-radius: 7px; color: var(--tx2);
    border-left: 2px solid transparent; transition: all .15s;
}
.toc li a:hover { color: var(--pri); background: var(--pri-soft); }
.toc li a.is-cur { color: var(--pri); border-left-color: var(--pri); font-weight: 600; }

/* ---- 点赞 ---- */
.like-wrap { text-align: center; margin-top: 26px; }
.like-btn {
    display: inline-flex; align-items: center; gap: 8px; padding: 11px 30px;
    border: 1.5px solid var(--line); border-radius: 99px; background: var(--card);
    color: var(--tx2); font-size: 14.5px; font-weight: 600; cursor: pointer; transition: all .2s;
}
.like-btn:hover { border-color: var(--pri); color: var(--pri); transform: translateY(-2px); }
.like-btn.is-done { border-color: var(--pri); background: var(--pri-soft); color: var(--pri); cursor: default; }
.like-btn.is-busy { opacity: .6; pointer-events: none; }
.like-btn.is-pop { animation: like-pop .4s ease; }
@keyframes like-pop {
    0% { transform: scale(1); } 40% { transform: scale(1.12); } 100% { transform: scale(1); }
}

/* ---- 版权声明 ---- */
.post-copyright {
    margin-top: 24px; background: var(--pri-soft); border: 1px dashed color-mix(in srgb, var(--pri) 40%, transparent);
    border-radius: 12px; padding: 14px 18px; font-size: 12.5px; color: var(--tx2); line-height: 1.9;
}
.post-copyright b { color: var(--pri); font-size: 13px; display: block; margin-bottom: 4px; }
.post-copyright a { color: var(--pri); word-break: break-all; }

/* ---- 图片灯箱 ---- */
.lightbox {
    position: fixed; inset: 0; z-index: 999; background: rgba(8, 12, 24, .88);
    display: flex; align-items: center; justify-content: center; cursor: zoom-out;
    animation: lb-in .18s ease;
}
.lightbox[hidden] { display: none; }
.lightbox img {
    max-width: 92vw; max-height: 92vh; border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, .5);
}
@keyframes lb-in { from { opacity: 0; } to { opacity: 1; } }
.md-body code { font-family: Consolas, "JetBrains Mono", "Courier New", monospace; }
.md-body :not(pre) > code {
    background: var(--pri-soft); color: var(--pri); border-radius: 5px; padding: 2px 7px; font-size: .88em;
}
.md-body img { border-radius: 10px; margin: 8px 0; box-shadow: var(--shadow); }
.md-body a { color: var(--pri); border-bottom: 1px dashed color-mix(in srgb, var(--pri) 45%, transparent); }
.md-body hr { border: 0; border-top: 1px dashed var(--line); margin: 24px 0; }

.single-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }
.single-tags a {
    background: var(--card); border: 1px solid var(--line); border-radius: 9px;
    padding: 5px 14px; font-size: 13px; color: var(--tx2); transition: all .15s;
}
.single-tags a:hover { color: var(--pri); border-color: var(--pri); }

.single-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 22px; }
.sn-item {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    padding: 14px 18px; display: flex; flex-direction: column; gap: 4px; transition: all .18s;
    min-height: 64px;
}
.sn-item:hover { border-color: var(--pri); transform: translateY(-2px); }
.sn-item small { color: var(--tx3); font-size: 12px; }
.sn-item b { font-size: 13.5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.sn-next { text-align: right; }

.related { margin-top: 26px; }
.related h2 { font-size: 17px; margin-bottom: 14px; }
.related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(170px, 1fr)); gap: 14px; }
.related-item {
    background: var(--card); border: 1px solid var(--line); border-radius: 12px; overflow: hidden;
    display: flex; flex-direction: column; transition: all .18s;
}
.related-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.ri-cover { height: 84px; background-size: cover; background-position: center; background-color: var(--pri-soft); }
.related-item b {
    padding: 12px 14px; font-size: 13px; line-height: 1.55; font-weight: 500;
    display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

/* ============ 标签云页 ============ */
.tags-grid {
    display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px;
}
.tag-card {
    background: var(--card); border: 1px solid var(--line); border-radius: 12px;
    padding: 18px 20px; display: flex; align-items: center; justify-content: space-between;
    transition: all .18s; position: relative; overflow: hidden;
}
.tag-card::after {
    content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 4px;
    background: hsl(var(--h) 70% 55%);
}
.tag-card b { font-size: 15px; }
.tag-card span { color: var(--tx3); font-size: 12.5px; }
.tag-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: hsl(var(--h) 70% 60%); }

/* ============ 友链导航页 ============ */
.link-group { margin-bottom: 26px; }
.link-group h2 { font-size: 17px; margin-bottom: 12px; display: flex; align-items: center; gap: 9px; }
.link-group h2::before { content: ""; width: 4px; height: 15px; border-radius: 2px; background: var(--pri); }
.links-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.link-card {
    display: flex; align-items: center; gap: 12px; background: var(--card);
    border: 1px solid var(--line); border-radius: 12px; padding: 14px 16px; transition: all .18s;
}
.link-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--pri); }
.link-card img { width: 28px; height: 28px; border-radius: 7px; object-fit: contain; flex: 0 0 auto; }
.link-letter {
    width: 28px; height: 28px; border-radius: 7px; background: var(--pri-soft); color: var(--pri);
    display: inline-flex; align-items: center; justify-content: center; font-weight: 700; flex: 0 0 auto;
}
.link-info { min-width: 0; }
.link-info b { display: block; font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.link-info small { color: var(--tx3); font-size: 12px; display: block; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

/* ============ 页脚（ZMT 式两行） ============ */
.footer {
    margin-top: 30px; color: rgba(255, 255, 255, .72);
    background:
        radial-gradient(700px 260px at 80% 0%, color-mix(in srgb, var(--footer-bg-2) 60%, transparent), transparent),
        linear-gradient(165deg, var(--footer-bg-1), color-mix(in srgb, var(--footer-bg-2) 88%, #000));
    position: relative;
}
.footer::before {
    content: ""; position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--pri) 70%, #fff), transparent);
}
.footer-inner { max-width: 1160px; margin: 0 auto; padding: 44px 20px 26px; }
.footer-top {
    display: flex; flex-wrap: wrap; align-items: flex-start; justify-content: space-between; gap: 8px 52px;
}
.footer-info { flex: 1 1 360px; min-width: 0; max-width: 560px; }
.footer-desc { font-size: 13.5px; line-height: 1.95; color: rgba(255, 255, 255, .62); }
.footer-disclaimer { margin-top: 10px; font-size: 12px; color: rgba(255, 255, 255, .4); line-height: 1.9; }
.footer-nav { flex: 0 1 auto; max-width: 460px; display: flex; flex-wrap: wrap; align-items: center; font-size: 13.5px; }
.footer-nav a { color: rgba(255, 255, 255, .66); padding: 7px 2px; transition: color .18s; }
.footer-nav a:hover { color: #fff; }
.footer-nav i { font-style: normal; color: rgba(255, 255, 255, .28); margin: 0 8px 0 2px; }
.footer-qr { flex: 0 0 auto; margin-left: auto; display: flex; gap: 18px; }
.footer-qr figure { margin: 0; text-align: center; }
.footer-qr img {
    display: block; width: 100px; height: 100px; padding: 6px; box-sizing: border-box;
    border-radius: 10px; background: #fff; object-fit: cover;
}
.footer-qr figcaption { margin-top: 8px; font-size: 12px; color: rgba(255, 255, 255, .55); }
.footer-bottom {
    display: flex; flex-wrap: wrap; align-items: center; gap: 4px 16px;
    margin-top: 30px; padding-top: 18px; border-top: 1px solid rgba(255, 255, 255, .08);
    color: rgba(255, 255, 255, .5); font-size: 12.5px;
}
.footer-bottom a {
    color: rgba(255, 255, 255, .5); display: inline-flex; align-items: center; gap: 5px;
    padding: 5px 0; transition: color .18s;
}
.footer-bottom a:hover { color: #fff; }

/* ============ 通用 ============ */
.empty-card {
    background: var(--card); border: 1px dashed var(--line); border-radius: var(--r);
    padding: 44px 20px; text-align: center; color: var(--tx2);
}
.e404 b { font-size: 64px; color: var(--pri); display: block; line-height: 1.2; }
.e404 p { margin: 10px 0 20px; }
.btn-pri {
    display: inline-block; background: var(--pri); color: #fff; border-radius: 10px;
    padding: 10px 28px; font-weight: 600;
}

.to-top {
    position: fixed; right: 26px; bottom: 30px; width: 44px; height: 44px;
    border-radius: 50%; border: 0; background: var(--pri); color: #fff; cursor: pointer;
    box-shadow: 0 8px 22px color-mix(in srgb, var(--pri) 45%, transparent);
    opacity: 0; transform: translateY(14px); transition: all .25s; z-index: 90;
}
.to-top.show { opacity: 1; transform: translateY(0); }
.to-top:hover { filter: brightness(1.1); }

/* ============ 响应式 ============ */
@media (max-width: 960px) {
    .layout { grid-template-columns: 1fr; }
    .sidebar { position: static; }
}
@media (max-width: 640px) {
    /* 顶栏折两行：品牌一行，导航整行横向滑动（不隐藏，手机也要能导航） */
    .topbar-inner { flex-wrap: wrap; height: auto; padding: 8px 14px 0; row-gap: 0; }
    .topnav {
        order: 3; width: 100%; margin: 4px -14px 0; padding: 0 14px 6px;
        overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none;
    }
    .topnav::-webkit-scrollbar { display: none; }
    .topnav a { white-space: nowrap; flex: 0 0 auto; padding: 7px 11px; }
    .topbar-acts { margin-left: auto; }
    .hero-inner { padding: 40px 16px 36px; }
    .post-card { flex-direction: column; padding: 14px; }
    .post-cover { flex-basis: auto; width: 100%; height: 150px; min-height: 0; }
    .single-head, .single-content { padding: 22px 18px; }
    .single-nav { grid-template-columns: 1fr; }
    .footer-top { flex-direction: column; }
    .footer-qr { margin-left: 0; margin-top: 14px; }
    .footer-qr img { width: 88px; height: 88px; }
}

/* ============================================================
 * v1.3.0 —— 公告条 / 分享 / 评论 / 会员中心 / 登录注册
 * ============================================================ */

/* ---- 站点公告条 ---- */
.announce {
    display: flex; align-items: center; gap: 10px;
    margin: 14px auto 0; max-width: 1160px; width: calc(100% - 28px);
    background: var(--pri-soft); border: 1px solid color-mix(in srgb, var(--pri) 22%, transparent);
    color: var(--tx); border-radius: 12px; padding: 10px 14px; font-size: 13.5px;
}
.announce[hidden] { display: none; }
.announce-dot { flex: 0 0 8px; width: 8px; height: 8px; border-radius: 50%; background: var(--pri); animation: announce-pulse 1.6s infinite; }
@keyframes announce-pulse { 50% { opacity: .35; } }
.announce-text { flex: 1; min-width: 0; }
.announce-close { flex: 0 0 auto; border: 0; background: transparent; color: var(--tx3); cursor: pointer; font-size: 14px; padding: 2px 6px; border-radius: 6px; }
.announce-close:hover { color: var(--tx); background: color-mix(in srgb, var(--tx3) 18%, transparent); }

/* ---- 顶栏会员入口 ---- */
.tb-member { display: inline-flex; align-items: center; justify-content: center; }
.tb-avatar { width: 24px; height: 24px; border-radius: 50%; object-fit: cover; }

/* ---- 分享条 ---- */
.share-bar { display: flex; align-items: center; flex-wrap: wrap; gap: 8px; margin-top: 18px; padding-top: 16px; border-top: 1px dashed var(--line); }
.share-label { font-size: 13px; color: var(--tx3); margin-right: 2px; }
.share-btn {
    display: inline-flex; align-items: center; gap: 5px; position: relative;
    font-size: 12.5px; padding: 6px 13px; border-radius: 99px; border: 1px solid var(--line);
    background: var(--card); color: var(--tx2); cursor: pointer; transition: all .18s;
}
.share-btn:hover { color: #fff; border-color: transparent; }
.share-btn.is-weibo:hover { background: #e6162d; }
.share-btn.is-qzone:hover { background: #ffce00; color: #5a4b00; }
.share-btn.is-wechat:hover { background: #07c160; }
.share-btn.is-wechat:hover i { color: #fff; }
.share-btn.is-copy:hover { background: var(--pri); }
.share-btn.is-wechat i { font-style: normal; }
.share-qr {
    display: none; position: absolute; top: calc(100% + 10px); left: 50%; transform: translateX(-50%);
    width: 132px; height: 132px; border-radius: 10px; background: #fff; padding: 6px;
    box-shadow: var(--shadow-lg); z-index: 20; pointer-events: none;
}
.share-btn.is-wechat:hover .share-qr { display: block; }

/* ---- 评论区 ---- */
.comments { margin-top: 26px; background: var(--card); border: 1px solid var(--line); border-radius: var(--r); box-shadow: var(--shadow); padding: 24px 26px; }
.comments-title { font-size: 18px; margin-bottom: 18px; }
.comments-title small { color: var(--tx3); font-size: 13px; font-weight: 500; margin-left: 6px; }
.cmt-msg { padding: 10px 14px; border-radius: 10px; font-size: 13.5px; margin-bottom: 14px; }
.cmt-msg.ok { background: #eafbf0; color: #15803d; border: 1px solid #bfe9cf; }
.cmt-msg.err { background: #ffeef2; color: #be123c; border: 1px solid #f8ccd7; }
[data-theme="dark"] .cmt-msg.ok { background: #12301f; border-color: #1e4d31; }
[data-theme="dark"] .cmt-msg.err { background: #3a1521; border-color: #5c2130; }
.cmt-empty { color: var(--tx3); font-size: 13.5px; text-align: center; padding: 22px 0; }
.cmt-list { margin-bottom: 8px; }
.cmt-item { padding: 13px 0; border-bottom: 1px solid var(--line); }
.cmt-item:last-child { border-bottom: 0; }
.cmt-children { margin-left: 44px; padding-left: 14px; border-left: 2px solid var(--line); }
.cmt-children .cmt-item { padding: 11px 0 2px; border-bottom: 0; }
.cmt-head { display: flex; align-items: center; gap: 9px; }
.cmt-avatar { width: 34px; height: 34px; border-radius: 50%; object-fit: cover; flex: 0 0 34px; }
.cmt-avatar.is-txt { display: inline-flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700; }
.cmt-name { font-size: 14px; }
.cmt-badge { font-size: 11px; background: var(--pri); color: #fff; border-radius: 5px; padding: 1px 7px; font-weight: 500; }
.cmt-head time { font-size: 12px; color: var(--tx3); margin-left: auto; }
.cmt-body { margin: 7px 0 5px 43px; font-size: 14px; line-height: 1.75; word-break: break-word; }
.cmt-children .cmt-body { margin-left: 0; }
.cmt-acts { margin-left: 43px; }
.cmt-children .cmt-acts { margin-left: 0; }
.cmt-reply-btn { border: 0; background: none; color: var(--tx3); font-size: 12.5px; cursor: pointer; padding: 2px 4px; }
.cmt-reply-btn:hover { color: var(--pri); }

/* 评论表单 */
.cmt-form { margin-top: 16px; border-top: 1px solid var(--line); padding-top: 18px; display: grid; gap: 10px; }
.cmt-form textarea, .cmt-form input {
    width: 100%; background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
    padding: 10px 13px; color: var(--tx); font-family: inherit; font-size: 14px;
}
.cmt-form textarea:focus, .cmt-form input:focus { border-color: var(--pri); outline: none; }
.cmt-form textarea { resize: vertical; min-height: 90px; }
.grid-cmt { display: grid; grid-template-columns: 1fr 1.4fr; gap: 10px; }
.cmt-as { font-size: 13px; color: var(--tx2); }
.cmt-as b { color: var(--pri); }
.cmt-cap { display: flex; align-items: center; gap: 10px; font-size: 13.5px; color: var(--tx2); }
.cmt-cap input { width: 90px; text-align: center; }
.cmt-form-foot { display: flex; align-items: center; justify-content: space-between; gap: 10px; }
.cmt-hint { font-size: 12.5px; color: var(--tx3); }
.cmt-submit {
    border: 0; background: var(--pri); color: #fff; font-size: 14px; font-weight: 600;
    padding: 10px 26px; border-radius: 99px; cursor: pointer; transition: all .18s;
}
.cmt-submit:hover { background: var(--pri-deep); transform: translateY(-1px); }
.cmt-replying { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--pri); background: var(--pri-soft); border-radius: 9px; padding: 8px 12px; }
.cmt-replying[hidden] { display: none; }
.cmt-replying button { border: 0; background: none; color: var(--tx3); cursor: pointer; font-size: 12.5px; margin-left: auto; }
.cmt-replying button:hover { color: var(--tx); }

/* ---- 登录 / 注册 / 会员中心 ---- */
.auth-wrap { max-width: 440px; margin: 46px auto 60px; padding: 0 16px; }
.auth-wrap.is-wide { max-width: 880px; }
.auth-card, .member-card {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    box-shadow: var(--shadow); padding: 30px 30px 26px;
}
.auth-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.auth-card h1 { font-size: 20px; margin-bottom: 18px; }
.auth-form { display: grid; gap: 10px; }
.auth-form label { font-size: 13px; color: var(--tx2); margin-top: 4px; }
.auth-form input {
    width: 100%; background: var(--bg); border: 1px solid var(--line); border-radius: 10px;
    padding: 11px 13px; color: var(--tx); font-size: 14px;
}
.auth-form input:focus { border-color: var(--pri); outline: none; }
.auth-submit {
    margin-top: 10px; border: 0; background: var(--pri); color: #fff; font-size: 15px; font-weight: 600;
    padding: 12px; border-radius: 10px; cursor: pointer; transition: background .18s;
}
.auth-submit:hover { background: var(--pri-deep); }
.auth-alt { margin-top: 16px; font-size: 13.5px; color: var(--tx2); text-align: center; }
.auth-alt a { color: var(--pri); font-weight: 600; }
.auth-back { margin-top: 14px; font-size: 13px; text-align: center; }
.auth-back a { color: var(--tx3); }
.auth-back a:hover { color: var(--tx); }

.member-grid { display: grid; grid-template-columns: 250px 1fr; gap: 18px; align-items: start; }
.member-card { padding: 24px 26px; }
.member-card + .member-card { margin-top: 18px; }
.member-card h2 { font-size: 16px; margin-bottom: 16px; }
.member-side .member-card { text-align: center; display: grid; justify-items: center; gap: 6px; }
.member-avatar { width: 72px; height: 72px; border-radius: 50%; object-fit: cover; border: 3px solid var(--pri-soft); }
.member-avatar.sm { width: 48px; height: 48px; }
.member-avatar.is-txt { display: inline-flex; align-items: center; justify-content: center; background: var(--pri); color: #fff; font-size: 26px; font-weight: 700; }
.member-name { font-size: 16px; margin-top: 4px; }
.member-side small { color: var(--tx3); font-size: 12px; }
.member-stat { font-size: 13px; color: var(--tx2); margin-top: 4px; }
.member-stat b { color: var(--pri); }
.a-link-btn { border: 0; background: none; color: var(--tx3); cursor: pointer; font-size: 13px; margin-top: 8px; }
.a-link-btn:hover { color: #be123c; }
.avatar-row { display: flex; align-items: center; gap: 16px; }
.my-cmt-list { list-style: none; display: grid; gap: 12px; }
.my-cmt-list li { border: 1px solid var(--line); border-radius: 10px; padding: 11px 14px; font-size: 13.5px; }
.my-cmt-list small { display: block; color: var(--tx3); margin-top: 5px; }
.my-cmt-list small a { color: var(--pri); }

@media (max-width: 760px) {
    .member-grid { grid-template-columns: 1fr; }
    .grid-cmt { grid-template-columns: 1fr; }
    .comments { padding: 18px 16px; }
    .cmt-children { margin-left: 20px; padding-left: 10px; }
    .share-qr { display: none !important; }
}

/* ============================================================
 * v1.5.0 —— 归档页时间轴（默认主题）
 * ============================================================ */
.arc-year { font-size: 19px; font-weight: 800; margin: 24px 0 8px; padding-left: 10px; border-left: 4px solid var(--pri); }
.arc-month { display: flex; gap: 16px; padding: 8px 0 10px; border-bottom: 1px dashed var(--line); }
.arc-mname { flex: 0 0 64px; color: var(--pri); font-weight: 700; padding-top: 3px; }
.arc-list { flex: 1; list-style: none; }
.arc-list li { display: flex; align-items: baseline; gap: 10px; padding: 5px 0; }
.arc-list time { color: var(--tx3); font-size: 12.5px; flex: 0 0 38px; }
.arc-list small { margin-left: auto; color: var(--tx3); font-size: 12px; }
.arc-list a { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.arc-list a:hover { color: var(--pri); }
@media (max-width: 640px) { .arc-month { flex-direction: column; gap: 6px; } }

/* ============================================================
 * v1.10.0 —— 文章页目录侧挂（对标掘金/VuePress 阅读体验）
 * 宽屏 ≥1440px：目录脱离正文浮挂在右侧（fixed 跟随滚动），
 * 正文加宽到 860px；窄屏维持正文内折叠卡片不变。
 * ============================================================ */
/* v2.1.0d：文章/页面/归档已并入带侧栏的 1160 布局，
   目录保留正文内折叠卡片（v1.10 的 fixed 侧挂会与侧栏重叠，已移除） */

/* ============================================================
 * v2.0.0 —— 外观基座 / 首页营销模块 / 阅读增强
 * ============================================================ */

/* ---- 阅读进度条 ---- */
.read-progress {
    position: fixed; top: 0; left: 0; height: 3px; width: 0;
    background: linear-gradient(90deg, var(--pri), var(--pri-deep));
    z-index: 200; transition: width .1s linear; border-radius: 0 2px 2px 0;
}

/* ---- 顶栏 CTA 按钮 ---- */
.tb-cta {
    display: inline-flex; align-items: center; padding: 7px 16px; border-radius: 99px;
    background: var(--pri); color: #fff !important; font-size: 13.5px; font-weight: 600;
    box-shadow: 0 3px 10px color-mix(in srgb, var(--pri) 35%, transparent); transition: transform .15s;
}
.tb-cta:hover { transform: translateY(-1px); }

/* ---- 焦点图轮播 ---- */
.focus-wrap { max-width: 1160px; margin: 20px auto 0; padding: 0 20px; }
.focus {
    position: relative; height: 300px; border-radius: var(--r); overflow: hidden;
    box-shadow: var(--shadow); background: var(--card);
}
.focus-item {
    position: absolute; inset: 0; background-size: cover; background-position: center;
    opacity: 0; transition: opacity .6s ease; display: block;
}
.focus-item.is-cur { opacity: 1; }
.focus-item::after {
    content: ""; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 40%, rgba(0,0,0,.55));
}
.focus-title {
    position: absolute; left: 26px; bottom: 22px; color: #fff; font-size: 20px; font-weight: 700;
    text-shadow: 0 2px 8px rgba(0,0,0,.4); z-index: 2;
}
.focus-dots {
    position: absolute; right: 20px; bottom: 18px; display: flex; gap: 7px; z-index: 2;
}
.focus-dots button {
    width: 9px; height: 9px; border-radius: 50%; border: 0; cursor: pointer;
    background: rgba(255,255,255,.45); transition: all .2s; padding: 0;
}
.focus-dots button.is-cur { background: #fff; width: 22px; border-radius: 99px; }
@media (max-width: 760px) { .focus { height: 180px; } }

/* ---- 首页营销模块通用 ---- */
.kb-modules { margin-top: 8px; }
.kb-mod { padding: 46px 20px; }
.kb-mod:nth-child(even) { background: color-mix(in srgb, var(--pri) 4%, var(--bg)); }
.kb-mod-inner { max-width: 1160px; margin: 0 auto; }
.kb-mod-head { text-align: center; margin-bottom: 30px; }
.kb-mod-head h2 { font-size: 26px; font-weight: 800; letter-spacing: .5px; }
.kb-mod-head p { color: var(--tx2); margin-top: 8px; font-size: 14.5px; }

/* 优势 */
.kb-benefits-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 18px; }
.kb-benefit {
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    padding: 26px 24px; box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
}
.kb-benefit:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.kb-benefit-icon { font-size: 30px; display: block; margin-bottom: 12px; }
.kb-benefit b { font-size: 16.5px; display: block; margin-bottom: 6px; }
.kb-benefit p { color: var(--tx2); font-size: 13.5px; line-height: 1.7; }

/* 分类导航 */
.kb-cats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 18px; }
.kb-cat {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    padding: 28px 18px; box-shadow: var(--shadow); transition: all .2s; text-align: center;
}
.kb-cat:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--pri); }
.kb-cat-icon { font-size: 34px; }
.kb-cat b { font-size: 16px; }
.kb-cat small { color: var(--tx3); }

/* 数据统计 */
.kb-facts-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 18px; text-align: center; }
.kb-fact { padding: 18px; }
.kb-fact b { font-size: 40px; font-weight: 900; color: var(--pri); display: block; line-height: 1.2; }
.kb-fact span { color: var(--tx2); font-size: 14px; }

/* 步骤 */
.kb-steps-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 18px; }
.kb-step {
    position: relative; background: var(--card); border: 1px solid var(--line); border-radius: var(--r);
    padding: 26px 22px 22px 66px; box-shadow: var(--shadow);
}
.kb-step em {
    position: absolute; left: 18px; top: 22px; width: 34px; height: 34px; border-radius: 50%;
    background: var(--pri); color: #fff; font-style: normal; font-weight: 800;
    display: flex; align-items: center; justify-content: center; font-size: 15px;
}
.kb-step b { display: block; font-size: 15.5px; margin-bottom: 5px; }
.kb-step p { color: var(--tx2); font-size: 13.5px; line-height: 1.7; }

/* FAQ */
.kb-faq-item {
    background: var(--card); border: 1px solid var(--line); border-radius: 12px;
    padding: 4px 20px; margin-bottom: 10px; box-shadow: var(--shadow);
}
.kb-faq-item summary { cursor: pointer; font-weight: 600; font-size: 15px; padding: 12px 0; list-style: none; }
.kb-faq-item summary::-webkit-details-marker { display: none; }
.kb-faq-item summary::before { content: "❓ "; }
.kb-faq-item p { color: var(--tx2); padding: 0 0 14px; line-height: 1.8; font-size: 14px; }

/* CTA */
.kb-cta-inner {
    text-align: center; background: linear-gradient(135deg, var(--pri), var(--pri-deep));
    border-radius: var(--r); color: #fff; padding: 46px 30px; box-shadow: var(--shadow-lg);
}
.kb-cta-title { font-size: 26px; font-weight: 800; display: block; }
.kb-cta-inner p { opacity: .9; margin: 10px 0 4px; font-size: 14.5px; }
.kb-cta-count { margin: 14px 0 4px; font-size: 22px; font-weight: 800; letter-spacing: 2px; font-variant-numeric: tabular-nums; }
.kb-cta-count span {
    display: inline-block; background: rgba(255,255,255,.16); border-radius: 8px;
    padding: 4px 10px; margin: 0 2px; min-width: 44px;
}
.kb-cta-btns { margin-top: 18px; display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.kb-cta-btns .btn-pri { background: #fff; color: var(--pri); box-shadow: none; }
.kb-cta-btn2 {
    display: inline-flex; padding: 10px 26px; border-radius: 99px; color: #fff;
    border: 1.5px solid rgba(255,255,255,.6); font-size: 14px; transition: all .15s;
}
.kb-cta-btn2:hover { background: rgba(255,255,255,.14); }

/* 自定义 Hero */
.kb-hero-points { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 16px; }
.kb-hero-points span {
    background: color-mix(in srgb, var(--card) 70%, transparent); border: 1px solid var(--line);
    border-radius: 99px; padding: 5px 16px; font-size: 13.5px; color: var(--tx2);
    backdrop-filter: blur(8px);
}
.kb-hero-btns { display: flex; gap: 12px; justify-content: center; margin-top: 20px; flex-wrap: wrap; }
.kb-hero-btns .btn-pri { padding: 11px 30px; border-radius: 99px; }
.kb-hero-btn2 {
    display: inline-flex; align-items: center; padding: 11px 30px; border-radius: 99px;
    border: 1.5px solid var(--pri); color: var(--pri); font-size: 14px; transition: all .15s;
}
.kb-hero-btn2:hover { background: var(--pri-soft); }

/* ---- 紧凑列表样式 ---- */
.post-card.is-compact { display: block; padding: 14px 18px; }
.post-card.is-compact h2 { font-size: 16px; }
.post-card.is-compact .post-meta { padding-top: 6px; }
.meta-min { color: var(--tx3); }

/* ---- 相关文章紧凑列表 ---- */
.related.is-compact .related-grid { grid-template-columns: 1fr; gap: 0; }
.related.is-compact .related-item {
    display: flex; justify-content: space-between; align-items: center;
    padding: 10px 4px; border-bottom: 1px dashed var(--line); border-radius: 0;
}
.related.is-compact .related-item:hover { background: var(--pri-soft); }
.related.is-compact .related-item b { font-weight: 500; font-size: 14px; }
.related.is-compact .related-item time { color: var(--tx3); font-size: 12.5px; }

/* ---- 移动端侧栏隐藏选项 ---- */
@media (max-width: 760px) {
    body[data-kb-sidemobile="none"] .sidebar { display: none; }
}

/* ---- 标签云页定制变量 ---- */
.tags-page { --tag-cols: 0; --tag-fs: 0px; }
.tags-grid[style*="--tag-cols"] { grid-template-columns: repeat(var(--tag-cols), 1fr); }

/* ============================================================
 * v2.1.1 —— 文章目录移入侧栏顶部（桌面 sticky），正文内目录仅窄屏
 * ============================================================ */
.side-toc-list { list-style: none; margin: 0; padding: 0; }
.side-toc-list li { margin: 0; }
.side-toc-list li a {
    display: block; padding: 5px 8px; border-radius: 8px;
    font-size: 13px; color: var(--tx2); text-decoration: none;
    white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
    border-left: 2px solid transparent; transition: all .15s;
}
.side-toc-list li.lv3 { padding-left: 18px; }
.side-toc-list li a:hover { color: var(--pri); background: var(--pri-soft); }
.side-toc { max-height: calc(100vh - 140px); overflow-y: auto; }

/* 互斥显示：≥900px 用侧栏目录，正文内目录隐藏；<900px 反之 */
@media (min-width: 900px) {
    .single-content > .toc { display: none; }
}
@media (max-width: 899.98px) {
    .sidebar .side-toc { display: none; }
}