/* ==========================================================================
   myblog.lslongabc.dpdns.org —— 学习与分析笔记
   纯手写静态站样式表 / 零依赖 / 单文件
   设计语言：Light Glassmorphism，柔和光晕 + 毛玻璃卡片
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. 设计令牌
   -------------------------------------------------------------------------- */
:root {
  --bg:            #f4f7fc;
  --glow-1:        rgba(37, 99, 235, .18);
  --glow-2:        rgba(124, 58, 237, .13);
  --glow-3:        rgba(13, 148, 136, .11);

  --surface:       rgba(255, 255, 255, .72);
  --surface-2:     rgba(255, 255, 255, .92);
  --surface-3:     rgba(255, 255, 255, .55);

  --border:        rgba(148, 163, 184, .30);
  --hairline:      rgba(15, 23, 42, .07);

  --text:          #0f172a;
  --text-2:        #475569;
  --text-3:        #8593a8;

  --blue:          #2563eb;
  --blue-ink:      #1d4ed8;
  --blue-wash:     rgba(37, 99, 235, .09);

  --c-tech:        #2563eb;
  --c-industry:    #c2410c;
  --c-reading:     #7c3aed;
  --c-pixel:       #0d9488;

  --shadow-sm:     0 1px 2px rgba(15, 23, 42, .05);
  --shadow:        0 1px 2px rgba(15, 23, 42, .04), 0 14px 36px -16px rgba(15, 23, 42, .20);
  --shadow-lg:     0 2px 4px rgba(15, 23, 42, .04), 0 30px 64px -26px rgba(15, 23, 42, .30);

  --r-sm: 10px;
  --r:    14px;
  --r-lg: 20px;
  --r-full: 999px;

  --maxw:  1180px;
  --nav-h: 64px;

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

  --ease: cubic-bezier(.22, .61, .36, 1);
}

[data-theme="dark"] {
  --bg:            #0b1220;
  --glow-1:        rgba(37, 99, 235, .24);
  --glow-2:        rgba(124, 58, 237, .20);
  --glow-3:        rgba(13, 148, 136, .16);

  --surface:       rgba(19, 28, 45, .66);
  --surface-2:     rgba(21, 31, 50, .90);
  --surface-3:     rgba(19, 28, 45, .45);

  --border:        rgba(148, 163, 184, .20);
  --hairline:      rgba(255, 255, 255, .07);

  --text:          #e8eef8;
  --text-2:        #a5b3c9;
  --text-3:        #7688a3;

  --blue:          #60a5fa;
  --blue-ink:      #93c5fd;
  --blue-wash:     rgba(96, 165, 250, .14);

  --c-tech:        #60a5fa;
  --c-industry:    #fb923c;
  --c-reading:     #a78bfa;
  --c-pixel:       #2dd4bf;

  --shadow-sm:     0 1px 2px rgba(0, 0, 0, .30);
  --shadow:        0 1px 2px rgba(0, 0, 0, .30), 0 14px 36px -16px rgba(0, 0, 0, .62);
  --shadow-lg:     0 2px 4px rgba(0, 0, 0, .35), 0 30px 64px -26px rgba(0, 0, 0, .72);
}

/* --------------------------------------------------------------------------
   2. 基础
   -------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 20px);
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.75;
  letter-spacing: .01em;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* 背景光晕：固定不动，营造空气感 */
body::before {
  content: "";
  position: fixed;
  inset: -20vh -10vw;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(closest-side at 18% 12%, var(--glow-1), transparent 100%),
    radial-gradient(closest-side at 82% 8%,  var(--glow-2), transparent 100%),
    radial-gradient(closest-side at 62% 78%, var(--glow-3), transparent 100%);
  filter: blur(10px);
}

a { color: var(--blue-ink); text-decoration: none; transition: color .18s var(--ease); }
a:hover { color: var(--blue); }
img { max-width: 100%; height: auto; display: block; }
hr { border: 0; border-top: 1px solid var(--hairline); margin: 40px 0; }

::selection { background: rgba(37, 99, 235, .18); }

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

.wrap { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.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;
}

/* --------------------------------------------------------------------------
   3. 顶部导航
   -------------------------------------------------------------------------- */
.nav {
  position: sticky; top: 0; z-index: 60;
  height: var(--nav-h);
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease), background .25s var(--ease);
}
.nav.is-stuck { border-bottom-color: var(--border); }
.nav .wrap { display: flex; align-items: center; gap: 20px; }

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px; flex-shrink: 0;
  background: linear-gradient(140deg, var(--blue), #7c3aed);
  box-shadow: 0 4px 14px -4px rgba(37, 99, 235, .6);
  display: grid; place-items: center;
  color: #fff; font-weight: 800; font-size: 14px; letter-spacing: -.02em;
}
.brand-text { line-height: 1.15; }
.brand-name {
  display: block; font-size: 14.5px; font-weight: 700;
  color: var(--text); letter-spacing: -.01em;
}
.brand-sub { display: block; font-size: 11px; color: var(--text-3); letter-spacing: .06em; }

.nav-links { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav-link {
  position: relative;
  padding: 7px 13px; border-radius: var(--r-full);
  font-size: 14px; font-weight: 500; color: var(--text-2);
  transition: all .18s var(--ease);
}
.nav-link:hover { color: var(--text); background: var(--surface-3); }
.nav-link.is-active { color: var(--blue-ink); background: var(--blue-wash); font-weight: 600; }

.nav-tools { display: flex; align-items: center; gap: 6px; }

.icon-btn {
  width: 34px; height: 34px; flex-shrink: 0;
  display: grid; place-items: center;
  border: 1px solid var(--border); border-radius: var(--r-full);
  background: var(--surface); color: var(--text-2); cursor: pointer;
  transition: all .18s var(--ease);
}
.icon-btn:hover { color: var(--blue-ink); border-color: color-mix(in srgb, var(--blue) 40%, transparent); transform: translateY(-1px); }
.icon-btn svg { width: 16px; height: 16px; }

.nav-burger { display: none; }

/* --------------------------------------------------------------------------
   4. 通用组件
   -------------------------------------------------------------------------- */
.card {
  background: var(--surface);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow);
}

.pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 5px 12px; border-radius: var(--r-full);
  font-size: 12.5px; font-weight: 600; letter-spacing: .01em;
  background: var(--surface-2); border: 1px solid var(--border); color: var(--text-2);
}
.pill .dot { width: 6px; height: 6px; border-radius: 50%; background: currentColor; flex-shrink: 0; }

.cat-chip {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 4px 11px; border-radius: var(--r-full);
  font-size: 12px; font-weight: 600; white-space: nowrap;
  border: 1px solid transparent;
}
.cat-chip[data-cat="tech"]     { color: var(--c-tech);     background: color-mix(in srgb, var(--c-tech) 11%, transparent);     border-color: color-mix(in srgb, var(--c-tech) 24%, transparent); }
.cat-chip[data-cat="industry"] { color: var(--c-industry); background: color-mix(in srgb, var(--c-industry) 11%, transparent); border-color: color-mix(in srgb, var(--c-industry) 24%, transparent); }
.cat-chip[data-cat="reading"]  { color: var(--c-reading);  background: color-mix(in srgb, var(--c-reading) 11%, transparent);  border-color: color-mix(in srgb, var(--c-reading) 24%, transparent); }
.cat-chip[data-cat="pixel"]    { color: var(--c-pixel);    background: color-mix(in srgb, var(--c-pixel) 11%, transparent);    border-color: color-mix(in srgb, var(--c-pixel) 24%, transparent); }

.tag {
  display: inline-block; padding: 2px 9px; border-radius: var(--r-full);
  font-size: 11.5px; color: var(--text-3); background: var(--surface-3);
  border: 1px solid var(--hairline); transition: all .18s var(--ease);
}
.tag:hover { color: var(--blue-ink); border-color: color-mix(in srgb, var(--blue) 35%, transparent); }

.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  gap: 16px; margin: 0 0 20px;
}
.section-title {
  margin: 0; font-size: 19px; font-weight: 700; letter-spacing: -.015em;
  display: flex; align-items: center; gap: 10px;
}
.section-title::before {
  content: ""; width: 3px; height: 17px; border-radius: 2px;
  background: linear-gradient(180deg, var(--blue), #7c3aed);
}
.section-sub { margin: 4px 0 0; font-size: 13px; color: var(--text-3); }

/* --------------------------------------------------------------------------
   5. 首页 · Hero
   -------------------------------------------------------------------------- */
.hero { padding: 56px 0 34px; }
.hero-inner { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 40px; align-items: end; }

.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 5px 13px 5px 9px; border-radius: var(--r-full);
  background: var(--surface); border: 1px solid var(--border);
  font-size: 12.5px; color: var(--text-2); box-shadow: var(--shadow-sm);
}
.hero-eyebrow b { color: var(--blue-ink); font-weight: 600; }
.pulse {
  width: 7px; height: 7px; border-radius: 50%; background: #10b981; flex-shrink: 0;
  box-shadow: 0 0 0 0 rgba(16, 185, 129, .6); animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(16, 185, 129, .55); }
  70%  { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero h1 {
  margin: 18px 0 0;
  font-size: clamp(30px, 4.4vw, 46px);
  line-height: 1.22; font-weight: 800; letter-spacing: -.035em;
}
.hero h1 .accent {
  background: linear-gradient(100deg, var(--blue) 0%, #7c3aed 55%, #0d9488 100%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero .lede {
  margin: 16px 0 0; max-width: 60ch;
  font-size: 15.5px; color: var(--text-2); line-height: 1.85;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 26px; }

.btn {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 10px 19px; border-radius: var(--r-full);
  font-size: 14px; font-weight: 600; cursor: pointer;
  border: 1px solid transparent; transition: all .2s var(--ease);
  font-family: inherit;
}
.btn svg { width: 15px; height: 15px; }
.btn-primary {
  background: linear-gradient(135deg, var(--blue), #4f46e5);
  color: #fff; box-shadow: 0 8px 22px -8px rgba(37, 99, 235, .75);
}
.btn-primary:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 12px 28px -8px rgba(37, 99, 235, .85); }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text-2); box-shadow: var(--shadow-sm); }
.btn-ghost:hover { color: var(--blue-ink); transform: translateY(-2px); border-color: color-mix(in srgb, var(--blue) 35%, transparent); }

/* Hero 右侧数据卡 */
.stat-card { padding: 20px 22px; }
.stat-row { display: flex; align-items: baseline; justify-content: space-between; gap: 10px; padding: 9px 0; border-bottom: 1px dashed var(--hairline); }
.stat-row:last-child { border-bottom: 0; padding-bottom: 0; }
.stat-row:first-child { padding-top: 0; }
.stat-k { font-size: 13px; color: var(--text-3); }
.stat-v { font-size: 20px; font-weight: 800; letter-spacing: -.02em; color: var(--text); font-variant-numeric: tabular-nums; }
.stat-v small { font-size: 12px; font-weight: 600; color: var(--text-3); margin-left: 2px; }

/* --------------------------------------------------------------------------
   6. 筛选栏 / 搜索
   -------------------------------------------------------------------------- */
.toolbar {
  position: sticky; top: calc(var(--nav-h) + 10px); z-index: 40;
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  padding: 10px 14px; margin-bottom: 24px;
  background: color-mix(in srgb, var(--surface-2) 88%, transparent);
  backdrop-filter: saturate(180%) blur(16px);
  -webkit-backdrop-filter: saturate(180%) blur(16px);
  border: 1px solid var(--border); border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
}
.filters { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.filter-btn {
  padding: 6px 13px; border-radius: var(--r-full);
  font-size: 13px; font-weight: 500; font-family: inherit;
  color: var(--text-2); background: transparent;
  border: 1px solid transparent; cursor: pointer;
  transition: all .18s var(--ease); white-space: nowrap;
}
.filter-btn:hover { background: var(--surface-3); color: var(--text); }
.filter-btn.is-active { background: var(--text); color: var(--bg); font-weight: 600; }
.filter-btn .n {
  margin-left: 5px; font-size: 11px; opacity: .6; font-variant-numeric: tabular-nums;
}

.search-box {
  margin-left: auto; position: relative; display: flex; align-items: center;
  min-width: 210px; flex: 0 1 260px;
}
.search-box svg {
  position: absolute; left: 11px; width: 15px; height: 15px;
  color: var(--text-3); pointer-events: none;
}
#search {
  width: 100%; padding: 8px 32px 8px 33px;
  font-family: inherit; font-size: 13.5px; color: var(--text);
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--r-full); transition: all .18s var(--ease);
}
#search::placeholder { color: var(--text-3); }
#search:focus {
  outline: none; border-color: color-mix(in srgb, var(--blue) 55%, transparent);
  box-shadow: 0 0 0 3px var(--blue-wash);
}
.search-clear {
  position: absolute; right: 8px; width: 20px; height: 20px;
  display: none; place-items: center; border: 0; cursor: pointer;
  background: var(--surface-3); color: var(--text-3); border-radius: 50%;
}
.search-box.has-value .search-clear { display: grid; }

/* --------------------------------------------------------------------------
   7. 首页布局 & 文章卡片
   -------------------------------------------------------------------------- */
.layout { display: grid; grid-template-columns: minmax(0, 1fr) 292px; gap: 40px; padding-bottom: 72px; align-items: start; }

.post-list { display: grid; gap: 14px; }

.post-card {
  position: relative; display: block; padding: 22px 24px;
  background: var(--surface);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  border: 1px solid var(--border); border-radius: var(--r-lg);
  box-shadow: var(--shadow-sm);
  transition: transform .25s var(--ease), box-shadow .25s var(--ease), border-color .25s var(--ease);
  overflow: hidden;
  animation: rise .5s var(--ease) both;
}
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

.post-card::after {
  content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px;
  background: var(--bar, var(--blue)); opacity: 0;
  transition: opacity .25s var(--ease);
}
.post-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--bar, var(--blue)) 32%, var(--border));
}
.post-card:hover::after { opacity: 1; }

.post-card[data-cat="tech"]     { --bar: var(--c-tech); }
.post-card[data-cat="industry"] { --bar: var(--c-industry); }
.post-card[data-cat="reading"]  { --bar: var(--c-reading); }
.post-card[data-cat="pixel"]    { --bar: var(--c-pixel); }

.post-card.is-featured {
  background: linear-gradient(135deg,
              color-mix(in srgb, var(--blue) 7%, var(--surface-2)),
              var(--surface));
}

.pc-top { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; margin-bottom: 11px; }
.pc-date { font-size: 12.5px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.pc-dot { width: 3px; height: 3px; border-radius: 50%; background: var(--text-3); opacity: .6; }
.pc-read { font-size: 12.5px; color: var(--text-3); }

.pc-title {
  margin: 0 0 8px; font-size: 18.5px; font-weight: 700;
  line-height: 1.45; letter-spacing: -.02em; color: var(--text);
}
.post-card:hover .pc-title { color: var(--blue-ink); }
.pc-excerpt {
  margin: 0; font-size: 14px; color: var(--text-2); line-height: 1.78;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.pc-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 14px; }
.pc-more {
  display: inline-flex; align-items: center; gap: 5px; margin-top: 14px;
  font-size: 13px; font-weight: 600; color: var(--blue-ink);
}
.pc-more svg { width: 14px; height: 14px; transition: transform .2s var(--ease); }
.post-card:hover .pc-more svg { transform: translateX(3px); }

.empty-state {
  padding: 56px 24px; text-align: center;
  border: 1px dashed var(--border); border-radius: var(--r-lg);
  background: var(--surface-3);
}
.empty-state h3 { margin: 0 0 6px; font-size: 16px; font-weight: 600; }
.empty-state p { margin: 0; font-size: 13.5px; color: var(--text-3); }

/* --------------------------------------------------------------------------
   8. 侧边栏
   -------------------------------------------------------------------------- */
.sidebar { display: grid; gap: 16px; position: sticky; top: calc(var(--nav-h) + 20px); }

.widget { padding: 18px 20px; }
.widget-title {
  margin: 0 0 13px; font-size: 13px; font-weight: 700;
  color: var(--text-3); letter-spacing: .09em; text-transform: uppercase;
}

.author { display: flex; gap: 12px; align-items: center; margin-bottom: 12px; }
.author-avatar {
  width: 42px; height: 42px; border-radius: 13px; flex-shrink: 0;
  background: linear-gradient(140deg, var(--blue), #7c3aed);
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 16px;
  box-shadow: 0 6px 18px -6px rgba(37, 99, 235, .7);
}
.author-name { font-size: 14.5px; font-weight: 700; line-height: 1.3; }
.author-role { font-size: 12.5px; color: var(--text-3); }
.widget p { margin: 0; font-size: 13.5px; color: var(--text-2); line-height: 1.8; }

.cat-list { display: grid; gap: 3px; }
.cat-item {
  display: flex; align-items: center; gap: 10px;
  padding: 8px 10px; border-radius: var(--r-sm);
  font-size: 13.5px; color: var(--text-2); cursor: pointer;
  background: transparent; border: 0; font-family: inherit; text-align: left; width: 100%;
  transition: all .18s var(--ease);
}
.cat-item:hover { background: var(--surface-3); color: var(--text); }
.cat-item.is-active { background: var(--blue-wash); color: var(--blue-ink); font-weight: 600; }
.cat-swatch { width: 8px; height: 8px; border-radius: 3px; flex-shrink: 0; background: var(--sw, var(--blue)); }
.cat-name { flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.cat-count { font-size: 12px; color: var(--text-3); font-variant-numeric: tabular-nums; }

.cloud { display: flex; flex-wrap: wrap; gap: 6px; }
.cloud .tag { cursor: pointer; }

.recent { display: grid; gap: 2px; }
.recent-item {
  display: block; padding: 8px 10px; border-radius: var(--r-sm);
  font-size: 13.5px; color: var(--text-2); line-height: 1.6;
  transition: all .18s var(--ease);
}
.recent-item:hover { background: var(--surface-3); color: var(--blue-ink); }
.recent-date { display: block; font-size: 11.5px; color: var(--text-3); margin-top: 2px; }

/* --------------------------------------------------------------------------
   9. 文章页
   -------------------------------------------------------------------------- */
.post-hero { padding: 44px 0 30px; border-bottom: 1px solid var(--hairline); }
.crumb {
  display: inline-flex; align-items: center; gap: 6px; margin-bottom: 20px;
  font-size: 13px; font-weight: 500; color: var(--text-3);
}
.crumb:hover { color: var(--blue-ink); }
.crumb svg { width: 14px; height: 14px; }

.post-hero h1 {
  margin: 14px 0 0; max-width: 24ch;
  font-size: clamp(26px, 3.6vw, 38px);
  line-height: 1.3; font-weight: 800; letter-spacing: -.032em;
}
.post-lede {
  margin: 16px 0 0; max-width: 68ch;
  font-size: 16px; color: var(--text-2); line-height: 1.85;
}
.post-meta {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
  margin-top: 22px; font-size: 13px; color: var(--text-3);
}
.post-meta .sep { width: 3px; height: 3px; border-radius: 50%; background: currentColor; opacity: .6; }

.post-layout { display: grid; grid-template-columns: 208px minmax(0, 1fr); gap: 44px; padding: 40px 0 72px; align-items: start; }

.toc { position: sticky; top: calc(var(--nav-h) + 24px); }
.toc-title {
  margin: 0 0 11px; font-size: 11.5px; font-weight: 700;
  color: var(--text-3); letter-spacing: .1em; text-transform: uppercase;
}
.toc nav { display: grid; gap: 1px; border-left: 2px solid var(--hairline); }
.toc a {
  display: block; padding: 6px 0 6px 13px; margin-left: -2px;
  font-size: 13px; line-height: 1.55; color: var(--text-3);
  border-left: 2px solid transparent; transition: all .18s var(--ease);
}
.toc a:hover { color: var(--text); }
.toc a.is-current { color: var(--blue-ink); font-weight: 600; border-left-color: var(--blue); }
.toc a.lv3 { padding-left: 25px; font-size: 12.5px; }

.post-body { font-size: 16px; line-height: 1.92; color: var(--text-2); max-width: 74ch; }
.post-body > *:first-child { margin-top: 0; }
.post-body h2 {
  margin: 46px 0 16px; padding-top: 8px;
  font-size: 23px; font-weight: 700; line-height: 1.4;
  letter-spacing: -.024em; color: var(--text); scroll-margin-top: calc(var(--nav-h) + 24px);
}
.post-body h2::before {
  content: ""; display: block; width: 30px; height: 3px; border-radius: 2px;
  margin-bottom: 12px; background: linear-gradient(90deg, var(--blue), #7c3aed);
}
.post-body h3 {
  margin: 34px 0 12px; font-size: 18px; font-weight: 700;
  letter-spacing: -.015em; color: var(--text); scroll-margin-top: calc(var(--nav-h) + 24px);
}
.post-body h4 { margin: 26px 0 10px; font-size: 15.5px; font-weight: 700; color: var(--text); }
.post-body p { margin: 0 0 19px; }
.post-body strong { color: var(--text); font-weight: 650; }
.post-body a { border-bottom: 1px solid color-mix(in srgb, var(--blue) 35%, transparent); padding-bottom: 1px; }
.post-body a:hover { border-bottom-color: var(--blue); }
.post-body ul, .post-body ol { margin: 0 0 19px; padding-left: 24px; }
.post-body li { margin-bottom: 8px; }
.post-body li::marker { color: var(--text-3); }
.post-body blockquote {
  margin: 24px 0; padding: 4px 0 4px 20px;
  border-left: 3px solid color-mix(in srgb, var(--blue) 45%, transparent);
  color: var(--text-2); font-style: normal;
}
.post-body blockquote p:last-child { margin-bottom: 0; }
.post-body blockquote cite { display: block; margin-top: 8px; font-size: 13px; color: var(--text-3); }

.post-body code {
  padding: 2px 6px; border-radius: 5px; font-family: var(--mono); font-size: .87em;
  background: var(--blue-wash); color: var(--blue-ink);
}
.post-body pre {
  position: relative; margin: 24px 0; padding: 18px 20px;
  background: color-mix(in srgb, var(--text) 92%, var(--bg));
  border-radius: var(--r); overflow-x: auto;
  box-shadow: var(--shadow-sm);
}
.post-body pre code {
  padding: 0; background: none; color: #e2e8f0; font-size: 13.2px; line-height: 1.75;
}
.copy-code {
  position: absolute; top: 9px; right: 9px;
  padding: 4px 10px; font-size: 11.5px; font-family: inherit; font-weight: 600;
  color: #94a3b8; background: rgba(148, 163, 184, .13);
  border: 1px solid rgba(148, 163, 184, .22); border-radius: var(--r-full);
  cursor: pointer; opacity: 0; transition: all .18s var(--ease);
}
.post-body pre:hover .copy-code { opacity: 1; }
.copy-code:hover { color: #e2e8f0; background: rgba(148, 163, 184, .25); }

.post-body table {
  width: 100%; margin: 24px 0; border-collapse: collapse;
  font-size: 14px; background: var(--surface);
  border: 1px solid var(--border); border-radius: var(--r); overflow: hidden;
}
.post-body th, .post-body td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--hairline); }
.post-body th { background: var(--surface-3); font-weight: 700; color: var(--text); font-size: 13.5px; white-space: nowrap; }
.post-body tbody tr:last-child td { border-bottom: 0; }
.post-body tbody tr:hover { background: color-mix(in srgb, var(--blue) 4%, transparent); }

.note {
  margin: 24px 0; padding: 16px 20px; border-radius: var(--r);
  border: 1px solid var(--border); border-left: 3px solid var(--blue);
  background: var(--blue-wash); font-size: 14.5px;
}
.note.warn { border-left-color: #d97706; background: color-mix(in srgb, #d97706 9%, transparent); }
.note.tip  { border-left-color: #0d9488; background: color-mix(in srgb, #0d9488 9%, transparent); }
.note-title { display: block; margin-bottom: 5px; font-weight: 700; color: var(--text); font-size: 13.5px; }
.note p:last-child { margin-bottom: 0; }

/* 文章页脚 */
.post-foot { margin-top: 52px; padding-top: 26px; border-top: 1px solid var(--hairline); }
.post-foot .tags { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 26px; }

.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.pn-item {
  display: block; padding: 15px 18px; border-radius: var(--r);
  background: var(--surface); border: 1px solid var(--border);
  box-shadow: var(--shadow-sm); transition: all .22s var(--ease);
}
.pn-item:hover { transform: translateY(-2px); box-shadow: var(--shadow); border-color: color-mix(in srgb, var(--blue) 32%, transparent); }
.pn-item.next { text-align: right; }
.pn-label { display: block; font-size: 11.5px; color: var(--text-3); letter-spacing: .06em; margin-bottom: 5px; }
.pn-title { display: block; font-size: 14px; font-weight: 600; color: var(--text); line-height: 1.5; }
.pn-item:hover .pn-title { color: var(--blue-ink); }
.pn-item.is-empty { opacity: .35; pointer-events: none; }

/* --------------------------------------------------------------------------
   10. 归档页 / 关于页 / 指南页
   -------------------------------------------------------------------------- */
.page-head { padding: 52px 0 30px; }
.page-head h1 { margin: 0; font-size: clamp(27px, 3.6vw, 38px); font-weight: 800; letter-spacing: -.032em; }
.page-head .lede { margin: 14px 0 0; max-width: 64ch; font-size: 15.5px; color: var(--text-2); line-height: 1.85; }
.page-body { padding-bottom: 72px; max-width: 800px; }

.year-block { margin-bottom: 34px; }
.year-label {
  display: flex; align-items: center; gap: 14px; margin-bottom: 10px;
  font-size: 22px; font-weight: 800; letter-spacing: -.02em; color: var(--text);
  font-variant-numeric: tabular-nums;
}
.year-label::after { content: ""; flex: 1; height: 1px; background: var(--hairline); }

.tl-item {
  display: grid; grid-template-columns: 74px 1fr auto; gap: 16px; align-items: center;
  padding: 11px 14px; border-radius: var(--r-sm);
  transition: all .18s var(--ease);
}
.tl-item:hover { background: var(--surface); box-shadow: var(--shadow-sm); }
.tl-date { font-size: 12.5px; color: var(--text-3); font-variant-numeric: tabular-nums; }
.tl-title { font-size: 14.5px; font-weight: 550; color: var(--text); line-height: 1.55; }
.tl-item:hover .tl-title { color: var(--blue-ink); }

.info-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 14px; margin: 24px 0 0; }
.info-card { padding: 18px 20px; }
.info-card h3 { margin: 0 0 8px; font-size: 14.5px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.info-card p { margin: 0; font-size: 13.5px; color: var(--text-2); line-height: 1.8; }
.info-ico {
  width: 26px; height: 26px; border-radius: 8px; flex-shrink: 0;
  display: grid; place-items: center; font-size: 14px;
  background: var(--blue-wash); color: var(--blue-ink);
}

/* --------------------------------------------------------------------------
   11. 页脚
   -------------------------------------------------------------------------- */
.footer {
  margin-top: auto; padding: 34px 0 42px;
  border-top: 1px solid var(--hairline);
}
.footer .wrap { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; }
.footer p { margin: 0; font-size: 13px; color: var(--text-3); }
.footer-links { display: flex; align-items: center; gap: 16px; font-size: 13px; }
.footer-links a { color: var(--text-3); }
.footer-links a:hover { color: var(--blue-ink); }

/* --------------------------------------------------------------------------
   12. 浮动控件
   -------------------------------------------------------------------------- */
.progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0;
  z-index: 90; pointer-events: none;
  background: linear-gradient(90deg, var(--blue), #7c3aed, #0d9488);
  transition: width .1s linear;
}
.to-top {
  position: fixed; right: 26px; bottom: 26px; z-index: 70;
  width: 42px; height: 42px; display: grid; place-items: center;
  border-radius: 50%; cursor: pointer;
  background: var(--surface-2); color: var(--text-2);
  border: 1px solid var(--border); box-shadow: var(--shadow);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  opacity: 0; visibility: hidden; transform: translateY(10px);
  transition: all .26s var(--ease);
}
.to-top.is-visible { opacity: 1; visibility: visible; transform: none; }
.to-top:hover { color: var(--blue-ink); transform: translateY(-2px); }
.to-top svg { width: 17px; height: 17px; }

/* --------------------------------------------------------------------------
   13. 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 1000px) {
  .hero-inner { grid-template-columns: 1fr; gap: 26px; align-items: start; }
  .layout { grid-template-columns: 1fr; gap: 32px; }
  .sidebar { position: static; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
  .post-layout { grid-template-columns: 1fr; gap: 0; }
  .toc { display: none; }
}

@media (max-width: 720px) {
  body { font-size: 15px; }
  .wrap { padding: 0 18px; }
  .nav-links { display: none; }
  .nav-burger { display: grid; }
  .nav.is-open .nav-links {
    display: flex; flex-direction: column; align-items: stretch; gap: 2px;
    position: absolute; top: calc(var(--nav-h) + 8px); left: 18px; right: 18px;
    padding: 10px; border-radius: var(--r-lg);
    background: var(--surface-2); border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(18px); -webkit-backdrop-filter: blur(18px);
  }
  .nav.is-open .nav-link { padding: 11px 14px; border-radius: var(--r-sm); }

  .hero { padding: 38px 0 26px; }
  .toolbar { position: static; flex-direction: column; align-items: stretch; }
  .search-box { margin-left: 0; flex: 1 1 auto; min-width: 0; }
  .filters { overflow-x: auto; flex-wrap: nowrap; padding-bottom: 2px; scrollbar-width: none; }
  .filters::-webkit-scrollbar { display: none; }

  .post-card { padding: 18px 18px; }
  .pc-title { font-size: 17px; }
  .post-hero h1 { max-width: none; }
  .post-nav { grid-template-columns: 1fr; }
  .tl-item { grid-template-columns: 62px 1fr; }
  .tl-item .cat-chip { grid-column: 2; justify-self: start; }
  .to-top { right: 16px; bottom: 16px; }
  .footer .wrap { flex-direction: column; align-items: flex-start; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
  html { scroll-behavior: auto; }
}

@media print {
  .nav, .toolbar, .sidebar, .toc, .to-top, .footer-links, .post-nav { display: none !important; }
  body { background: #fff; }
  body::before { display: none; }
  .post-layout, .layout { grid-template-columns: 1fr; }
  .post-body { max-width: none; color: #000; }
}