/* =====================================================================
   全站样式
   ---------------------------------------------------------------------
   组织顺序：设计变量 → 基础重置 → 通用组件 → 页面区块 → 响应式
   颜色一律用变量，不要在下面直接写 #xxxxxx，
   否则以后想换配色要改几百处。
   ===================================================================== */

/* ---------------------------------------------------------- 设计变量 */

:root {
  /* 浅色（默认） */
  --bg:            #fbfaf8;
  --bg-elev:       #ffffff;
  --bg-subtle:     #f3f1ec;
  --border:        #e6e1d8;
  --border-strong: #d5cec1;
  --text:          #1e1c19;
  --text-soft:     #4a4640;
  --text-muted:    #7a746a;
  --accent:        #0f766e;
  --accent-hover:  #0b5c56;
  --accent-soft:   #ddf1ed;
  --accent-ink:    #ffffff;
  --warn:          #b45309;
  --warn-soft:     #fdf0dd;
  --code-bg:       #22272e;
  --code-text:     #d6dae0;
  --shadow:        0 1px 2px rgba(30, 28, 25, .04), 0 8px 24px rgba(30, 28, 25, .05);

  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
               "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "Cascadia Code", "SF Mono", Consolas,
               "Liberation Mono", Menlo, "Courier New", monospace;

  --radius:    12px;
  --radius-sm: 8px;
  --wrap:      1120px;
  --header-h:  64px;
}

/* 深色配色。两处重复是必要的：
   一处跟随系统偏好，一处响应用户手动切换的 data-theme。 */
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:            #15171b;
    --bg-elev:       #1b1e23;
    --bg-subtle:     #23272e;
    --border:        #2c313a;
    --border-strong: #3a404b;
    --text:          #e8e8e4;
    --text-soft:     #c3c5c8;
    --text-muted:    #8d939c;
    --accent:        #5eead4;
    --accent-hover:  #99f6e4;
    --accent-soft:   #133b38;
    --accent-ink:    #06231f;
    --warn:          #fbbf24;
    --warn-soft:     #3a2c12;
    --code-bg:       #10131a;
    --code-text:     #d6dae0;
    --shadow:        0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .28);
  }
}

:root[data-theme="dark"] {
  --bg:            #15171b;
  --bg-elev:       #1b1e23;
  --bg-subtle:     #23272e;
  --border:        #2c313a;
  --border-strong: #3a404b;
  --text:          #e8e8e4;
  --text-soft:     #c3c5c8;
  --text-muted:    #8d939c;
  --accent:        #5eead4;
  --accent-hover:  #99f6e4;
  --accent-soft:   #133b38;
  --accent-ink:    #06231f;
  --warn:          #fbbf24;
  --warn-soft:     #3a2c12;
  --code-bg:       #10131a;
  --code-text:     #d6dae0;
  --shadow:        0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .28);
}

/* ---------------------------------------------------------- 基础重置 */

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--header-h) + 16px); }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a { color: var(--accent); text-decoration: none; }
a:hover { color: var(--accent-hover); }

h1, h2, h3, h4 { line-height: 1.35; margin: 0; font-weight: 650; letter-spacing: -.01em; }
p  { margin: 0; }
ul, ol { margin: 0; padding: 0; }
img { max-width: 100%; height: auto; }

button { font: inherit; cursor: pointer; }

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

.mono  { font-family: var(--font-mono); font-size: .82rem; letter-spacing: -.01em; }
.muted { color: var(--text-muted); }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.copy-shim { position: fixed; left: -9999px; top: 0; opacity: 0; }

.skip-link {
  position: absolute; left: 12px; top: -60px; z-index: 200;
  padding: 10px 16px; border-radius: var(--radius-sm);
  background: var(--accent); color: var(--accent-ink);
  transition: top .18s ease;
}
.skip-link:focus { top: 12px; color: var(--accent-ink); }

.wrap { width: min(var(--wrap), 100% - 40px); margin-inline: auto; }
.section { padding-block: 40px; }
.stack { display: grid; gap: 16px; }

/* ---------------------------------------------------------- 头部导航 */

.site-header {
  position: sticky; top: 0; z-index: 100;
  background: color-mix(in srgb, var(--bg) 88%, transparent);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  min-height: var(--header-h);
  display: flex; align-items: center; gap: 20px;
}

.brand { display: flex; align-items: center; gap: 10px; color: var(--text); flex-shrink: 0; }
.brand:hover { color: var(--text); }

.brand__mark {
  display: grid; place-items: center;
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--accent); color: var(--accent-ink);
  font-family: var(--font-mono); font-size: .82rem; font-weight: 700;
}

.brand__text { display: flex; flex-direction: column; line-height: 1.25; }
.brand__text strong { font-size: .98rem; }
.brand__text small  { font-size: .72rem; color: var(--text-muted); }

.nav { margin-left: auto; display: flex; align-items: center; gap: 4px; }

.nav__link {
  padding: 7px 12px; border-radius: var(--radius-sm);
  color: var(--text-soft); font-size: .9rem; white-space: nowrap;
  transition: background .15s ease, color .15s ease;
}
.nav__link:hover { background: var(--bg-subtle); color: var(--text); }
.nav__link.is-active { background: var(--accent-soft); color: var(--accent); font-weight: 600; }

.nav-search { position: relative; display: flex; align-items: center; margin-left: 8px; }
.nav-search__icon {
  position: absolute; left: 10px; width: 15px; height: 15px;
  fill: none; stroke: var(--text-muted); stroke-width: 1.8; pointer-events: none;
}
.nav-search input {
  width: 150px; padding: 7px 10px 7px 30px;
  border: 1px solid var(--border); border-radius: 999px;
  background: var(--bg-elev); color: var(--text);
  font-size: .85rem; font-family: inherit;
  transition: width .2s ease, border-color .15s ease;
}
.nav-search input:focus { width: 200px; outline: none; border-color: var(--accent); }

.theme-toggle {
  display: grid; place-items: center;
  width: 34px; height: 34px; margin-left: 4px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg-elev); color: var(--text-soft);
}
.theme-toggle:hover { border-color: var(--accent); color: var(--accent); }
.theme-toggle svg { width: 17px; height: 17px; fill: none; stroke: currentColor; stroke-width: 1.7; stroke-linecap: round; }

/* 浅色时显示月亮（点了会变深色），深色时显示太阳 */
.icon-moon { display: block; }
.icon-sun  { display: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .icon-moon { display: none; }
  :root:not([data-theme="light"]) .icon-sun  { display: block; }
}
:root[data-theme="dark"] .icon-moon { display: none; }
:root[data-theme="dark"] .icon-sun  { display: block; }
:root[data-theme="light"] .icon-moon { display: block; }
:root[data-theme="light"] .icon-sun  { display: none; }

.nav-toggle {
  display: none; margin-left: auto;
  width: 38px; height: 38px; padding: 9px;
  flex-direction: column; justify-content: space-between;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg-elev);
}
.nav-toggle span { display: block; height: 2px; background: var(--text); border-radius: 2px; transition: transform .2s ease, opacity .2s ease; }
.nav-toggle.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open span:nth-child(2) { opacity: 0; }
.nav-toggle.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------------------------------------------------------- 通用组件 */

.card {
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
}

.btn {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 10px 18px; border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--bg-elev); color: var(--text);
  font-size: .9rem; font-weight: 500;
  transition: transform .12s ease, border-color .15s ease, background .15s ease;
}
.btn:hover { color: var(--text); border-color: var(--accent); transform: translateY(-1px); }
.btn--primary { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn--primary:hover { background: var(--accent-hover); border-color: var(--accent-hover); color: var(--accent-ink); }
.btn--small { padding: 7px 14px; font-size: .82rem; }

.badge {
  display: inline-flex; align-items: center;
  padding: 3px 9px; border-radius: 999px;
  font-size: .74rem; font-weight: 600; white-space: nowrap;
  background: var(--bg-subtle); color: var(--text-soft);
}
.badge--notes    { background: var(--accent-soft); color: var(--accent); }
.badge--pitfalls { background: var(--warn-soft);   color: var(--warn); }
.badge--pin      { background: var(--warn-soft);   color: var(--warn); }
.badge--mini     { padding: 2px 7px; font-size: .68rem; }

.tag-list { display: flex; flex-wrap: wrap; gap: 6px; }

.tag {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 9px; border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--bg-subtle); color: var(--text-muted);
  font-family: var(--font-mono); font-size: .74rem;
  transition: border-color .15s ease, color .15s ease;
}
.tag:hover { border-color: var(--accent); color: var(--accent); }
.tag--static { cursor: default; }
.tag--static:hover { border-color: var(--border); color: var(--text-muted); }
.tag__count { color: var(--text-muted); opacity: .7; }

.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 18px; }
.section-title { font-size: 1.22rem; }
.section-more  { font-size: .85rem; }

.empty { text-align: center; padding: 48px 24px; display: grid; gap: 10px; justify-items: center; }
.empty__title { font-size: 1.05rem; font-weight: 600; }
.empty code {
  padding: 2px 6px; border-radius: 5px;
  background: var(--bg-subtle); font-family: var(--font-mono); font-size: .85em;
}

/* ---------------------------------------------------------- 首页 */

.hero {
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 18% 0%, var(--accent-soft), transparent 55%),
    var(--bg);
}
.hero__inner { padding-block: 64px 56px; max-width: 720px; }
.hero__prompt { color: var(--text-muted); margin-bottom: 10px; }
.hero__dollar { color: var(--accent); font-weight: 700; }
.hero__title { font-size: clamp(2rem, 5vw, 2.9rem); letter-spacing: -.02em; }
.hero__desc  { margin-top: 14px; font-size: 1.03rem; color: var(--text-soft); }

.hero__stats { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 24px; color: var(--text-muted); }
.hero__stats strong { color: var(--accent); font-size: 1rem; }

.hero__actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }

.cat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }

.cat-card {
  display: grid; grid-template-columns: auto 1fr; gap: 14px;
  align-items: start; color: var(--text);
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}
.cat-card:hover { transform: translateY(-2px); border-color: var(--accent); box-shadow: var(--shadow); color: var(--text); }
.cat-card__icon  { font-size: 1.7rem; line-height: 1; }
.cat-card__name  { font-size: 1.05rem; }
.cat-card__desc  { margin-top: 5px; font-size: .88rem; color: var(--text-muted); }
.cat-card__count { grid-column: 2; color: var(--accent); }

.layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 32px; padding-block: 8px 56px; }
.layout__side { display: grid; gap: 16px; align-content: start; position: sticky; top: calc(var(--header-h) + 20px); }

.side-block__title { font-size: .95rem; margin-bottom: 12px; }
.side-block--accent { background: var(--accent-soft); border-color: transparent; }
.side-block--accent .muted { color: var(--text-soft); }
.side-block--accent p { font-size: .85rem; margin-bottom: 12px; }
.side-block__more { display: inline-block; margin-top: 12px; font-size: .82rem; }

.rank-list { list-style: none; display: grid; gap: 10px; counter-reset: rank; }
.rank-list li {
  display: flex; gap: 10px; align-items: baseline;
  font-size: .88rem; counter-increment: rank;
}
.rank-list li::before {
  content: counter(rank, decimal-leading-zero);
  font-family: var(--font-mono); font-size: .72rem; color: var(--accent); flex-shrink: 0;
}
.rank-list a { color: var(--text-soft); flex: 1; }
.rank-list a:hover { color: var(--accent); }

/* ---------------------------------------------------------- 文章卡片 */

.post-card { transition: border-color .15s ease, box-shadow .15s ease; }
.post-card:hover { border-color: var(--border-strong); box-shadow: var(--shadow); }

.post-card__error {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap;
  margin-bottom: 12px; padding: 8px 12px;
  border-left: 3px solid var(--warn); border-radius: 0 6px 6px 0;
  background: var(--warn-soft);
}
.post-card__error-label { font-size: .68rem; font-weight: 700; color: var(--warn); letter-spacing: .06em; flex-shrink: 0; }
.post-card__error code {
  font-family: var(--font-mono); font-size: .78rem; color: var(--text-soft);
  overflow-wrap: anywhere;
}

.post-card__top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 10px; }
.post-card__title { font-size: 1.14rem; margin-bottom: 8px; }
.post-card__title a { color: var(--text); }
.post-card__title a:hover { color: var(--accent); }
.post-card__summary { color: var(--text-muted); font-size: .9rem; }
.post-card__foot {
  display: flex; align-items: center; justify-content: space-between;
  gap: 12px; flex-wrap: wrap; margin-top: 14px;
}
.post-card__stats { display: flex; gap: 6px; flex-shrink: 0; }

/* ---------------------------------------------------------- 页头 / 分页 */

.page-head { border-bottom: 1px solid var(--border); background: var(--bg-elev); }
.page-head .wrap { padding-block: 44px 32px; }
.page-head__kicker { color: var(--text-muted); margin-bottom: 8px; }
.page-head__title  { font-size: clamp(1.6rem, 4vw, 2.2rem); }
.page-head__desc   { margin-top: 10px; color: var(--text-soft); max-width: 620px; }
.page-head .muted  { margin-top: 12px; }

.search-box { display: flex; gap: 10px; margin-top: 20px; max-width: 560px; }
.search-box input {
  flex: 1; padding: 11px 16px;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--bg); color: var(--text); font: inherit; font-size: .92rem;
}
.search-box input:focus { outline: none; border-color: var(--accent); }

.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 32px; flex-wrap: wrap; }
.pagination__btn {
  padding: 8px 14px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  font-size: .85rem; color: var(--text-soft);
}
.pagination__btn:hover { border-color: var(--accent); color: var(--accent); }
.pagination__btn.is-disabled { opacity: .35; pointer-events: none; }
.pagination__pages { display: flex; gap: 4px; }
.pagination__page {
  display: grid; place-items: center; min-width: 34px; height: 34px;
  border-radius: var(--radius-sm); font-family: var(--font-mono); font-size: .82rem;
  color: var(--text-soft);
}
.pagination__page:hover { background: var(--bg-subtle); }
.pagination__page.is-current { background: var(--accent); color: var(--accent-ink); }

/* ---------------------------------------------------------- 归档 / 标签 */

.archive-year { margin-bottom: 36px; }
.archive-year__label {
  display: flex; align-items: baseline; gap: 12px;
  font-size: 1.5rem; font-weight: 700; color: var(--accent);
  padding-bottom: 10px; margin-bottom: 6px;
  border-bottom: 1px solid var(--border);
}
.archive-year__label span { font-size: .72rem; color: var(--text-muted); font-weight: 400; }

.archive-list { list-style: none; }
.archive-item {
  display: flex; align-items: center; gap: 14px;
  padding: 11px 6px; border-bottom: 1px dashed var(--border);
}
.archive-item:hover { background: var(--bg-subtle); border-radius: 6px; }
.archive-item__date  { color: var(--text-muted); flex-shrink: 0; width: 46px; }
.archive-item__title { color: var(--text); flex: 1; font-size: .95rem; }
.archive-item__title:hover { color: var(--accent); }

.tag-cloud { display: flex; flex-wrap: wrap; gap: 10px; align-items: center; padding: 28px; }
.tag--lv1 { font-size: .76rem; }
.tag--lv2 { font-size: .88rem; padding: 5px 12px; }
.tag--lv3 { font-size: 1rem;   padding: 6px 14px; }
.tag--lv4 { font-size: 1.14rem; padding: 7px 16px; color: var(--accent); border-color: var(--accent); }

/* ---------------------------------------------------------- 文章详情 */

.progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 110; }
.progress__bar {
  display: block; height: 100%; width: var(--progress, 0%);
  background: var(--accent); transition: width .1s linear;
}

.post__head { border-bottom: 1px solid var(--border); background: var(--bg-elev); }
.post__head .wrap { padding-block: 36px 30px; max-width: 820px; }

.crumbs { display: flex; gap: 8px; color: var(--text-muted); margin-bottom: 14px; }

.post__error {
  display: grid; gap: 5px; margin-bottom: 18px; padding: 12px 16px;
  border-left: 3px solid var(--warn); border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--warn-soft);
}
.post__error-label { font-size: .7rem; font-weight: 700; color: var(--warn); letter-spacing: .06em; }
.post__error code { font-family: var(--font-mono); font-size: .84rem; overflow-wrap: anywhere; }

.post__title   { font-size: clamp(1.7rem, 4.5vw, 2.4rem); letter-spacing: -.02em; }
.post__summary { margin-top: 12px; color: var(--text-soft); font-size: 1rem; }
.post__meta    { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 16px; color: var(--text-muted); }
.post__meta + .tag-list { margin-top: 14px; }

.post__body {
  display: grid; grid-template-columns: minmax(0, 1fr) 220px;
  gap: 48px; padding-block: 40px 24px; align-items: start;
}

.toc {
  position: sticky; top: calc(var(--header-h) + 24px);
  max-height: calc(100vh - var(--header-h) - 60px); overflow-y: auto;
  padding-left: 18px; border-left: 1px solid var(--border);
}
.toc__title { color: var(--text-muted); margin-bottom: 10px; letter-spacing: .08em; }
.toc ul { list-style: none; display: grid; gap: 6px; }
.toc ul ul { margin-top: 6px; padding-left: 12px; }
.toc a {
  display: block; font-size: .82rem; color: var(--text-muted);
  line-height: 1.45; border-left: 2px solid transparent; padding-left: 8px; margin-left: -10px;
}
.toc a:hover { color: var(--accent); }
.toc a.is-active { color: var(--accent); border-left-color: var(--accent); font-weight: 600; }

.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.post-nav__item { display: grid; gap: 6px; color: var(--text); transition: border-color .15s ease; }
.post-nav__item:hover { border-color: var(--accent); color: var(--text); }
.post-nav__item--next { text-align: right; }
.post-nav__item strong { font-size: .95rem; font-weight: 600; }

.related { margin-top: 40px; }
.related .section-title { margin-bottom: 16px; }
.related__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 16px; }
.related__item { display: grid; gap: 8px; align-content: start; color: var(--text); }
.related__item:hover { border-color: var(--accent); color: var(--text); }
.related__item strong { font-size: .95rem; }
.related__item p { font-size: .82rem; }

/* ---------------------------------------------------------- 正文排版 */

.prose {
  font-size: 1.02rem;
  line-height: 1.9;          /* 中文行高要比英文大，不然很挤 */
  color: var(--text-soft);
  max-width: 76ch;
  overflow-wrap: break-word;
}
.prose--page { max-width: 76ch; margin-top: 32px; }

.prose > * + * { margin-top: 1.15em; }
.prose h2, .prose h3, .prose h4 { color: var(--text); margin-top: 2em; margin-bottom: .7em; }
.prose h2 {
  font-size: 1.42rem; padding-bottom: .35em;
  border-bottom: 1px solid var(--border);
}
.prose h3 { font-size: 1.15rem; }
.prose h4 { font-size: 1.02rem; }

.prose ul, .prose ol { padding-left: 1.4em; }
.prose li + li { margin-top: .4em; }
.prose li::marker { color: var(--accent); }

.prose blockquote {
  padding: 4px 0 4px 18px;
  border-left: 3px solid var(--accent);
  color: var(--text-muted); font-style: normal;
}
.prose blockquote > * + * { margin-top: .8em; }

.prose hr { height: 1px; border: 0; background: var(--border); margin-block: 2.4em; }

/* 行内代码 */
.prose :not(pre) > code {
  padding: .15em .42em; border-radius: 5px;
  background: var(--bg-subtle); border: 1px solid var(--border);
  font-family: var(--font-mono); font-size: .86em; color: var(--accent);
  overflow-wrap: anywhere;
}

/* 代码块：不管深浅色主题，代码区一律深底，视觉上更像终端 */
.prose pre, .prose .codehilite {
  position: relative;
  padding: 16px 18px; border-radius: var(--radius-sm);
  background: var(--code-bg); color: var(--code-text);
  overflow-x: auto; font-size: .86rem; line-height: 1.65;
}
.prose .codehilite pre { padding: 0; background: none; overflow-x: visible; }
.prose pre code { font-family: var(--font-mono); background: none; border: 0; padding: 0; color: inherit; }

.copy-btn {
  position: absolute; top: 8px; right: 8px;
  padding: 4px 10px; border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, .18);
  background: rgba(255, 255, 255, .07); color: #cfd4da;
  font-family: var(--font-mono); font-size: .7rem;
  opacity: 0; transition: opacity .15s ease, background .15s ease;
}
.has-copy:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.copy-btn:hover { background: rgba(255, 255, 255, .16); }
.copy-btn.is-done { color: #5eead4; border-color: #5eead4; opacity: 1; }

.prose table {
  width: 100%; border-collapse: collapse; font-size: .9rem;
  display: block; overflow-x: auto;
}
.prose th, .prose td { padding: 9px 14px; border: 1px solid var(--border); text-align: left; }
.prose th { background: var(--bg-subtle); color: var(--text); font-weight: 600; }

.prose img { border-radius: var(--radius-sm); border: 1px solid var(--border); }

/* Markdown 的 !!! note 提示框 */
.prose .admonition {
  padding: 14px 18px; border-radius: var(--radius-sm);
  border-left: 3px solid var(--accent); background: var(--accent-soft);
}
.prose .admonition-title { font-weight: 700; color: var(--accent); margin-bottom: 6px; }
.prose .admonition.warning { border-left-color: var(--warn); background: var(--warn-soft); }
.prose .admonition.warning .admonition-title { color: var(--warn); }

/* ---------------------------------------------------------- 关于页 */

.skills { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 16px; }
.skills__label { color: var(--text-muted); margin-bottom: 10px; letter-spacing: .06em; }

.project-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.project { display: grid; gap: 10px; align-content: start; }
.project__name { font-size: 1.02rem; }
.project__desc { font-size: .88rem; color: var(--text-muted); }

/* ---------------------------------------------------------- 404 */

.notfound { text-align: center; display: grid; gap: 14px; justify-items: center; padding-block: 80px; }
.notfound__code { font-size: 4.5rem; font-weight: 700; color: var(--accent); line-height: 1; }
.notfound__title { font-size: 1.5rem; }
.notfound__shell {
  text-align: left; padding: 16px 20px; border-radius: var(--radius-sm);
  background: var(--code-bg); color: var(--code-text);
  overflow-x: auto; max-width: 100%; font-size: .82rem; margin: 0;
}

/* ---------------------------------------------------------- 页脚 */

.site-footer { margin-top: 40px; border-top: 1px solid var(--border); background: var(--bg-elev); }
.site-footer__inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px; padding-block: 40px 28px;
}
.site-footer__col { display: grid; gap: 7px; align-content: start; }
.site-footer__col a { font-size: .86rem; color: var(--text-muted); }
.site-footer__col a:hover { color: var(--accent); }
.site-footer__brand { font-weight: 650; }
.site-footer__heading { font-size: .8rem; font-weight: 700; letter-spacing: .06em; color: var(--text); margin-bottom: 3px; }
.site-footer__bottom {
  display: flex; flex-wrap: wrap; gap: 14px; align-items: center;
  padding-block: 18px; border-top: 1px solid var(--border);
  font-size: .8rem; color: var(--text-muted);
}
.site-footer__bottom a { color: var(--text-muted); }

/* ---------------------------------------------------------- 响应式 */

@media (max-width: 1024px) {
  .layout { grid-template-columns: 1fr; }
  .layout__side { position: static; }
  .post__body { grid-template-columns: 1fr; gap: 0; }
  .toc { display: none; }   /* 窄屏放不下侧边目录，直接隐藏 */
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }

  .nav {
    position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 2px;
    padding: 12px 20px 18px;
    background: var(--bg-elev); border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    display: none;
  }
  .nav.is-open { display: flex; }
  .nav-search { margin: 8px 0 0; }
  .nav-search input, .nav-search input:focus { width: 100%; }
  .theme-toggle { margin: 8px 0 0; width: 100%; height: 38px; }

  .site-footer__inner { grid-template-columns: 1fr 1fr; }
  .post-nav { grid-template-columns: 1fr; }
  .post-nav__item--next { text-align: left; }
  .hero__inner { padding-block: 44px 40px; }
}

@media (max-width: 520px) {
  .wrap { width: calc(100% - 32px); }
  .site-footer__inner { grid-template-columns: 1fr; }
  .archive-item { flex-wrap: wrap; }
  .prose { font-size: .98rem; }
}

/* 尊重「减少动态效果」的系统设置 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}