/* ---------------------------------------------------------------
   cyriak.xyz — static stylesheet
   零外部依赖：不引用 CDN、字体服务、分析脚本。
   --------------------------------------------------------------- */

/* ---- 设计令牌 ---- */

:root {
  --bg:         #faf8f4;
  --bg-elev:    #ffffff;
  --bg-soft:    #f2efe8;
  --bg-code:    #f5f2ec;
  --fg:         #1b1a17;
  --fg-soft:    #45423c;
  --fg-muted:   #78736a;
  --fg-faint:   #a8a29a;
  --line:       #e4dfd5;
  --line-soft:  #eeeae2;
  --accent:     #96551f;
  --accent-ink: #7a4416;
  --accent-bg:  #f6ece0;
  --sel:        #f0dcc4;

  --radius:     10px;
  --radius-sm:  6px;
  --shadow:     0 1px 2px rgba(28, 24, 18, .04), 0 8px 24px -12px rgba(28, 24, 18, .12);
  --shadow-lg:  0 2px 4px rgba(28, 24, 18, .04), 0 18px 48px -20px rgba(28, 24, 18, .18);

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC",
          "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
          "Liberation Mono", "Noto Sans Mono", monospace;
}

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) {
    --bg:        #131216;
    --bg-elev:   #1a191e;
    --bg-soft:   #1f1e24;
    --bg-code:   #1c1b21;
    --fg:        #eae7e1;
    --fg-soft:   #c9c4bb;
    --fg-muted:  #938d83;
    --fg-faint:  #6a655d;
    --line:      #2b2932;
    --line-soft: #242229;
    --accent:    #e2a86b;
    --accent-ink:#f0c294;
    --accent-bg: #2a2119;
    --sel:       #4a3a26;
    --shadow:    0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .6);
    --shadow-lg: 0 2px 4px rgba(0, 0, 0, .3), 0 18px 48px -20px rgba(0, 0, 0, .8);
  }
}

html[data-theme="dark"] {
  --bg:        #131216;
  --bg-elev:   #1a191e;
  --bg-soft:   #1f1e24;
  --bg-code:   #1c1b21;
  --fg:        #eae7e1;
  --fg-soft:   #c9c4bb;
  --fg-muted:  #938d83;
  --fg-faint:  #6a655d;
  --line:      #2b2932;
  --line-soft: #242229;
  --accent:    #e2a86b;
  --accent-ink:#f0c294;
  --accent-bg: #2a2119;
  --sel:       #4a3a26;
  --shadow:    0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px -12px rgba(0, 0, 0, .6);
  --shadow-lg: 0 2px 4px rgba(0, 0, 0, .3), 0 18px 48px -20px rgba(0, 0, 0, .8);
}

/* ---- 基础 ---- */

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 5.5rem;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.78;
  font-feature-settings: "kern" 1;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  /* 极淡的纸纹，纯 CSS，无图片请求 */
  background-image:
    radial-gradient(circle at 18% -10%, var(--accent-bg) 0%, transparent 42%),
    radial-gradient(circle at 92% 4%, var(--bg-soft) 0%, transparent 34%);
  background-repeat: no-repeat;
}

::selection { background: var(--sel); color: var(--fg); }

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
  transition: color .15s ease;
}
a:hover { color: var(--accent-ink); }

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

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

hr {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 3rem 0;
}

/* ---- 布局 ---- */

.shell {
  max-width: 62rem;
  margin: 0 auto;
  padding: 0 1.75rem;
}

.narrow {
  max-width: 44rem;
  margin: 0 auto;
}

main { display: block; }

/* ---- 顶栏 ---- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .2s ease, background .2s ease;
}

.topbar.is-scrolled {
  border-bottom-color: var(--line);
}

@supports not (background: color-mix(in srgb, red 50%, blue)) {
  .topbar { background: var(--bg); }
}

.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  height: 4rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  font-size: 1rem;
  font-weight: 650;
  letter-spacing: -.01em;
  color: var(--fg);
  text-decoration: none;
  white-space: nowrap;
}
.brand:hover { color: var(--fg); }

.brand .mark {
  width: 1.55rem;
  height: 1.55rem;
  border-radius: 7px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  font-size: .8rem;
  font-weight: 700;
  letter-spacing: 0;
  box-shadow: 0 2px 8px -2px rgba(150, 85, 31, .5);
}

.brand .dot { color: var(--accent); }

.nav {
  display: flex;
  align-items: center;
  gap: .35rem;
}

.nav a {
  color: var(--fg-muted);
  text-decoration: none;
  font-size: .9rem;
  padding: .4rem .7rem;
  border-radius: var(--radius-sm);
  transition: color .15s, background .15s;
}
.nav a:hover { color: var(--fg); background: var(--bg-soft); }
.nav a[aria-current="page"] { color: var(--fg); font-weight: 550; }

.theme-btn {
  display: grid;
  place-items: center;
  width: 2.1rem;
  height: 2.1rem;
  margin-left: .25rem;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--bg-elev);
  color: var(--fg-muted);
  cursor: pointer;
  transition: color .15s, border-color .15s, transform .15s;
}
.theme-btn:hover { color: var(--fg); border-color: var(--fg-faint); }
.theme-btn:active { transform: scale(.94); }
.theme-btn svg { width: 1.05rem; height: 1.05rem; }
.theme-btn .sun { display: none; }
html[data-theme="dark"] .theme-btn .sun { display: block; }
html[data-theme="dark"] .theme-btn .moon { display: none; }

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .theme-btn .sun { display: block; }
  html:not([data-theme]) .theme-btn .moon { display: none; }
}

/* ---- 首屏 ---- */

.hero {
  padding: 4.5rem 0 3rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--fg-muted);
  margin-bottom: 1.5rem;
}

.eyebrow::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: var(--accent);
  opacity: .7;
}

.hero h1 {
  font-size: clamp(2rem, 5.2vw, 3.1rem);
  line-height: 1.14;
  letter-spacing: -.035em;
  font-weight: 700;
  margin: 0 0 1.25rem;
  max-width: 22ch;
}

.hero h1 em {
  font-style: normal;
  color: var(--accent);
}

.hero .lede {
  font-size: 1.0625rem;
  line-height: 1.75;
  color: var(--fg-soft);
  max-width: 38rem;
  margin: 0 0 2rem;
}

.hero-links {
  display: flex;
  flex-wrap: wrap;
  gap: .6rem;
  align-items: center;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  padding: .55rem 1rem;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-weight: 500;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform .15s, box-shadow .15s, background .15s, border-color .15s;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 1px 2px rgba(0, 0, 0, .12);
}
.btn-primary:hover { color: #fff; transform: translateY(-1px); box-shadow: 0 6px 18px -8px rgba(150, 85, 31, .7); }
.btn-ghost {
  background: var(--bg-elev);
  color: var(--fg);
  border-color: var(--line);
}
.btn-ghost:hover { color: var(--fg); border-color: var(--fg-faint); transform: translateY(-1px); }
.btn svg { width: 1rem; height: 1rem; }

.status {
  display: inline-flex;
  align-items: center;
  gap: .45rem;
  font-size: .8125rem;
  color: var(--fg-muted);
  margin-left: .35rem;
}
.status .pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: #3f9a5f;
  box-shadow: 0 0 0 0 rgba(63, 154, 95, .5);
  animation: pulse 2.6s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(63, 154, 95, .45); }
  70%  { box-shadow: 0 0 0 7px rgba(63, 154, 95, 0); }
  100% { box-shadow: 0 0 0 0 rgba(63, 154, 95, 0); }
}

/* ---- 章节标题 ---- */

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin: 3.5rem 0 1.5rem;
  padding-bottom: .75rem;
  border-bottom: 1px solid var(--line);
}

.section-head h2 {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -.01em;
  margin: 0;
  border: 0;
  padding: 0;
}

.section-head .more {
  font-size: .85rem;
  color: var(--fg-muted);
  text-decoration: none;
}
.section-head .more:hover { color: var(--accent); }

/* ---- 文章列表 ---- */

.post-list { list-style: none; margin: 0; padding: 0; }

.post-list > li { border-bottom: 1px solid var(--line-soft); }
.post-list > li:last-child { border-bottom: 0; }

.post-item {
  display: grid;
  grid-template-columns: 6.2rem 1fr;
  gap: 1.5rem;
  padding: 1.6rem .25rem;
  text-decoration: none;
  color: inherit;
  border-radius: var(--radius);
  transition: background .18s ease, padding .18s ease;
  margin: 0 -.5rem;
  padding-left: 1rem;
  padding-right: 1rem;
}

.post-item:hover {
  background: var(--bg-elev);
  box-shadow: var(--shadow);
  color: inherit;
}

.post-item time {
  font-family: var(--mono);
  font-size: .78rem;
  color: var(--fg-faint);
  font-variant-numeric: tabular-nums;
  padding-top: .3rem;
  letter-spacing: .01em;
}

.post-item h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: -.012em;
  margin: 0 0 .35rem;
  line-height: 1.5;
  transition: color .15s;
}
.post-item:hover h3 { color: var(--accent); }

.post-item p {
  margin: 0 0 .6rem;
  font-size: .9rem;
  line-height: 1.65;
  color: var(--fg-muted);
}

.tags { display: flex; flex-wrap: wrap; gap: .4rem; }

.tag {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .02em;
  color: var(--fg-muted);
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  padding: .12rem .45rem;
  border-radius: 4px;
  text-decoration: none;
  transition: color .15s, border-color .15s, background .15s;
}
a.tag:hover { color: var(--accent); border-color: var(--accent); background: var(--accent-bg); }

/* ---- 卡片网格 ---- */

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: 1rem;
  margin: 1.5rem 0 0;
}

.card {
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 1.25rem 1.25rem 1.35rem;
  box-shadow: var(--shadow);
  transition: transform .18s ease, box-shadow .18s ease, border-color .18s ease;
}
.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--line);
}

.card h3 {
  font-size: .9375rem;
  font-weight: 600;
  margin: 0 0 .5rem;
  display: flex;
  align-items: center;
  gap: .5rem;
}
.card h3 svg { width: 1.05rem; height: 1.05rem; color: var(--accent); flex: none; }

.card p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--fg-muted);
}

/* ---- 正文排版 ---- */

.article {
  padding: 3rem 0 1rem;
}

.crumbs {
  font-family: var(--mono);
  font-size: .75rem;
  color: var(--fg-faint);
  margin-bottom: 1.75rem;
  letter-spacing: .02em;
}
.crumbs a { color: var(--fg-muted); text-decoration: none; }
.crumbs a:hover { color: var(--accent); }
.crumbs span { margin: 0 .5rem; opacity: .6; }

.article h1 {
  font-size: clamp(1.65rem, 3.6vw, 2.35rem);
  line-height: 1.24;
  letter-spacing: -.028em;
  font-weight: 700;
  margin: 0 0 1.25rem;
}

.post-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .55rem 1rem;
  font-size: .8125rem;
  color: var(--fg-muted);
  padding-bottom: 1.75rem;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2.25rem;
}

.post-meta .sep {
  width: 3px;
  height: 3px;
  border-radius: 50%;
  background: var(--fg-faint);
}

.post-meta .rt { font-family: var(--mono); font-size: .75rem; }

.prose { font-size: 1.0125rem; line-height: 1.85; }

.prose > p:first-child {
  font-size: 1.075rem;
  color: var(--fg-soft);
}

.prose h2 {
  font-size: 1.3rem;
  line-height: 1.4;
  letter-spacing: -.018em;
  font-weight: 650;
  margin: 3rem 0 1rem;
  scroll-margin-top: 5.5rem;
}

.prose h2::before {
  content: "";
  display: block;
  width: 1.5rem;
  height: 2px;
  background: var(--accent);
  opacity: .8;
  margin-bottom: .9rem;
  border-radius: 1px;
}

.prose h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  margin: 2rem 0 .65rem;
  scroll-margin-top: 5.5rem;
}

.prose p { margin: 0 0 1.35rem; }

.prose ul, .prose ol { margin: 0 0 1.35rem; padding-left: 1.35rem; }
.prose li { margin-bottom: .5rem; }
.prose li::marker { color: var(--accent); }
.prose li > ul, .prose li > ol { margin: .5rem 0 .25rem; }

.prose strong { font-weight: 620; color: var(--fg); }

.prose blockquote {
  margin: 1.75rem 0;
  padding: .9rem 1.25rem;
  background: var(--bg-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--fg-soft);
  font-size: .95rem;
}
.prose blockquote p:last-child { margin-bottom: 0; }

.prose code {
  font-family: var(--mono);
  font-size: .855em;
  background: var(--bg-code);
  border: 1px solid var(--line-soft);
  padding: .08em .38em;
  border-radius: 4px;
  color: var(--accent-ink);
  word-break: break-word;
}

/* ---- 代码块 ---- */

.code-block {
  position: relative;
  margin: 1.75rem 0;
  background: var(--bg-code);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.code-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .5rem .75rem .5rem 1rem;
  border-bottom: 1px solid var(--line-soft);
  background: color-mix(in srgb, var(--bg-soft) 60%, transparent);
}

@supports not (background: color-mix(in srgb, red 50%, blue)) {
  .code-head { background: var(--bg-soft); }
}

.code-head .lang {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-faint);
}

.copy-btn {
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .04em;
  color: var(--fg-muted);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: .18rem .5rem;
  cursor: pointer;
  transition: color .15s, border-color .15s, background .15s;
}
.copy-btn:hover { color: var(--fg); border-color: var(--fg-faint); }
.copy-btn.done { color: #3f9a5f; border-color: #3f9a5f; }

.code-block pre {
  margin: 0;
  padding: 1rem 1.1rem;
  overflow-x: auto;
  font-family: var(--mono);
  font-size: .825rem;
  line-height: 1.72;
  color: var(--fg-soft);
  tab-size: 2;
  -webkit-overflow-scrolling: touch;
}

.code-block pre code {
  background: none;
  border: 0;
  padding: 0;
  color: inherit;
  font-size: inherit;
}

.code-block pre::-webkit-scrollbar { height: 8px; }
.code-block pre::-webkit-scrollbar-thumb {
  background: var(--line);
  border-radius: 4px;
}

/* 语法着色令牌 */
.tok-com { color: var(--fg-faint); font-style: italic; }
.tok-str { color: #3f7d5a; }
.tok-key { color: var(--accent); font-weight: 600; }
.tok-num { color: #8a5aa8; }
.tok-var { color: #b06a2c; }
.tok-flag { color: #4b6fa8; }
.tok-pr  { color: var(--fg-faint); user-select: none; }

html[data-theme="dark"] .tok-str { color: #7fb98f; }
html[data-theme="dark"] .tok-num { color: #b48dd0; }
html[data-theme="dark"] .tok-var { color: #d9a06a; }
html[data-theme="dark"] .tok-flag { color: #8aa9d6; }

@media (prefers-color-scheme: dark) {
  html:not([data-theme]) .tok-str { color: #7fb98f; }
  html:not([data-theme]) .tok-num { color: #b48dd0; }
  html:not([data-theme]) .tok-var { color: #d9a06a; }
  html:not([data-theme]) .tok-flag { color: #8aa9d6; }
}

/* ---- 提示块 ---- */

.note {
  display: flex;
  gap: .85rem;
  margin: 1.75rem 0;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: var(--accent-bg);
  font-size: .925rem;
  line-height: 1.7;
  color: var(--fg-soft);
}
.note::before {
  content: "!";
  flex: none;
  width: 1.15rem;
  height: 1.15rem;
  margin-top: .18rem;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-family: var(--mono);
  font-size: .7rem;
  font-weight: 700;
  display: grid;
  place-items: center;
}
.note p { margin: 0; }
.note p + p { margin-top: .6rem; }
.note strong { color: var(--fg); }

/* ---- 表格 ---- */

.prose table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.75rem 0;
  font-size: .9rem;
}

.prose th, .prose td {
  text-align: left;
  padding: .6rem .75rem;
  border-bottom: 1px solid var(--line-soft);
  vertical-align: top;
}

.prose th {
  font-weight: 600;
  font-size: .8rem;
  letter-spacing: .02em;
  color: var(--fg-muted);
  border-bottom-color: var(--line);
}

.prose td code { font-size: .8em; }

/* ---- 目录 ---- */

.toc {
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin: 0 0 2.25rem;
  box-shadow: var(--shadow);
}

.toc-title {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: .6rem;
}

.toc ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: toc;
  font-size: .875rem;
}

.toc li { margin: 0; counter-increment: toc; }
.toc li::before {
  content: counter(toc, decimal-leading-zero);
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--fg-faint);
  margin-right: .6rem;
}
.toc li.lvl-3 { padding-left: 1.5rem; }
.toc li.lvl-3::before { content: "·"; }

.toc a {
  color: var(--fg-muted);
  text-decoration: none;
  transition: color .15s;
}
.toc a:hover, .toc a.active { color: var(--accent); }

/* 宽屏时目录排成两列，避免浮到侧栏带来的文字环绕问题 */
@media (min-width: 46rem) {
  .toc ol { column-count: 2; column-gap: 2rem; }
  .toc li { break-inside: avoid; }
}

/* ---- 上下篇 ---- */

.pager {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin: 3.5rem 0 0;
  padding-top: 2rem;
  border-top: 1px solid var(--line);
}

.pager a {
  display: block;
  padding: 1rem 1.15rem;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-elev);
  text-decoration: none;
  color: var(--fg);
  transition: border-color .18s, transform .18s, box-shadow .18s;
}
.pager a:hover {
  border-color: var(--line);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
  color: var(--fg);
}

.pager .dir {
  display: block;
  font-family: var(--mono);
  font-size: .7rem;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--fg-faint);
  margin-bottom: .35rem;
}

.pager .ttl { font-size: .9rem; font-weight: 550; line-height: 1.5; }

.pager .next { text-align: right; }
.pager .next:only-child { grid-column: 2; }

/* ---- 归档 ---- */

.year-group { margin: 0 0 2.5rem; }

.year {
  display: flex;
  align-items: center;
  gap: .85rem;
  font-family: var(--mono);
  font-size: .8rem;
  letter-spacing: .08em;
  color: var(--fg-faint);
  margin: 0 0 1rem;
}
.year::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-soft);
}

.arch-list { list-style: none; margin: 0; padding: 0; }

.arch-list li {
  display: grid;
  grid-template-columns: 3.6rem 1fr auto;
  gap: 1rem;
  align-items: baseline;
  padding: .62rem 0;
  border-bottom: 1px solid var(--line-soft);
}
.arch-list li:last-child { border-bottom: 0; }

.arch-list time {
  font-family: var(--mono);
  font-size: .76rem;
  color: var(--fg-faint);
  font-variant-numeric: tabular-nums;
}

.arch-list a {
  color: var(--fg);
  text-decoration: none;
  font-size: .9375rem;
  transition: color .15s;
}
.arch-list a:hover { color: var(--accent); }

.arch-list .n {
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--fg-faint);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: 1.25rem 0 0;
}

.tag-cloud a {
  display: inline-flex;
  align-items: baseline;
  gap: .4rem;
  font-size: .875rem;
  color: var(--fg-soft);
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  padding: .3rem .85rem;
  text-decoration: none;
  transition: border-color .15s, color .15s, transform .15s;
}
.tag-cloud a:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.tag-cloud .count {
  font-family: var(--mono);
  font-size: .7rem;
  color: var(--fg-faint);
}

/* ---- 关于页 ---- */

.about-head {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin: 0 0 2rem;
  flex-wrap: wrap;
}

.avatar {
  width: 4.5rem;
  height: 4.5rem;
  border-radius: 16px;
  display: grid;
  place-items: center;
  background: linear-gradient(145deg, var(--accent), var(--accent-ink));
  color: #fff;
  font-size: 1.65rem;
  font-weight: 700;
  letter-spacing: -.02em;
  box-shadow: 0 8px 24px -10px rgba(150, 85, 31, .8);
  flex: none;
}

.about-head h1 { margin: 0 0 .3rem; font-size: 1.9rem; letter-spacing: -.03em; }
.about-head p { margin: 0; color: var(--fg-muted); font-size: .95rem; }

dl.facts {
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: .55rem 1.25rem;
  margin: 0 0 1.75rem;
  font-size: .9rem;
  padding: 1.25rem 1.35rem;
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
}
dl.facts dt { color: var(--fg-faint); font-family: var(--mono); font-size: .76rem; letter-spacing: .04em; padding-top: .15rem; }
dl.facts dd { margin: 0; color: var(--fg-soft); }

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

.center {
  min-height: 62vh;
  display: grid;
  place-items: center;
  text-align: center;
  padding: 4rem 0;
}

.center .code {
  font-family: var(--mono);
  font-size: clamp(4rem, 14vw, 7rem);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -.05em;
  color: var(--line);
  margin: 0 0 1.25rem;
}

.center h1 { font-size: 1.35rem; margin: 0 0 .75rem; letter-spacing: -.02em; }
.center p { color: var(--fg-muted); margin: 0 auto 2rem; max-width: 26rem; font-size: .95rem; }
.center .hero-links { justify-content: center; }

/* ---- 页脚 ---- */

.footer {
  margin-top: 5rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  font-size: .8125rem;
  color: var(--fg-muted);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.25rem;
  flex-wrap: wrap;
}

.footer a { color: var(--fg-muted); text-decoration: none; }
.footer a:hover { color: var(--accent); }

.footer-links { display: flex; gap: 1.25rem; flex-wrap: wrap; }

.node {
  font-family: var(--mono);
  font-size: .72rem;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--fg-faint);
  display: inline-flex;
  align-items: center;
  gap: .45rem;
}
.node::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  opacity: .8;
}

/* ---- 阅读进度 ---- */

.progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: var(--accent);
  z-index: 60;
  transition: width .1s linear;
  opacity: 0;
}
.progress.on { opacity: 1; }

/* ---- 响应式 ---- */

@media (max-width: 46rem) {
  .shell { padding: 0 1.15rem; }
  .topbar-inner { height: 3.5rem; }
  .nav a { padding: .35rem .5rem; font-size: .85rem; }
  .nav a:first-child { display: none; }
  .hero { padding: 3rem 0 2rem; }
  .hero h1 { letter-spacing: -.03em; }
  .post-item {
    grid-template-columns: 1fr;
    gap: .35rem;
    padding: 1.35rem .75rem;
  }
  .post-item time { padding-top: 0; }
  .arch-list li { grid-template-columns: 3.2rem 1fr; }
  .arch-list .n { display: none; }
  .pager { grid-template-columns: 1fr; }
  .pager .next { text-align: left; }
  .pager .next:only-child { grid-column: 1; }
  dl.facts { grid-template-columns: 1fr; gap: .1rem; }
  dl.facts dd { margin-bottom: .7rem; }
  .prose { font-size: .9875rem; }
  .article { padding-top: 2rem; }
  .status { display: none; }
}

@media (max-width: 24rem) {
  .brand .txt { display: none; }
}

@media print {
  .topbar, .progress, .pager, .toc, .copy-btn, .footer-links { display: none; }
  body { background: #fff; color: #000; background-image: none; }
  .article { padding-top: 0; }
  .prose a { color: #000; text-decoration: underline; }
  .code-block { break-inside: avoid; }
}