/* ============================================================
   红云的博客 · sunset_red的web_log!!! · Material Design 3 主题「青瓷」
   ============================================================ */
@font-face {
  font-family: 'Google Sans Text'; font-style: normal; font-weight: 400; font-display: swap;
  src: url(https://fonts.gstatic.com/s/googlesanstext/v25/5aUu9-KzpRiLCAt4Unrc-xIKmCU5qEp2i0VBuxM.woff2) format('woff2');
}
@font-face {
  font-family: 'Google Sans Text'; font-style: normal; font-weight: 500; font-display: swap;
  src: url(https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oLlVnmhjtjm4DZw.woff2) format('woff2');
}
@font-face {
  font-family: 'Google Sans Text'; font-style: normal; font-weight: 700; font-display: swap;
  src: url(https://fonts.gstatic.com/s/googlesanstext/v25/5aUp9-KzpRiLCAt4Unrc-xIKmCU5oPFTnmhjtjm4DZw.woff2) format('woff2');
}

/* ---------------- M3 色彩令牌（亮色方案） ---------------- */
:root {
  --md-primary: #00696d;
  --md-on-primary: #ffffff;
  --md-primary-container: #9cf1f2;
  --md-on-primary-container: #002021;
  --md-secondary: #4a6365;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #cce8e9;
  --md-on-secondary-container: #051f21;
  --md-tertiary: #77592d;
  --md-on-tertiary: #ffffff;
  --md-tertiary-container: #ffdfa6;
  --md-on-tertiary-container: #271a00;
  --md-error: #ba1a1a;
  --md-on-error: #ffffff;
  --md-error-container: #ffdad6;
  --md-on-error-container: #410002;
  --md-surface: #f5faf9;
  --md-on-surface: #161d1d;
  --md-surface-variant: #dae4e5;
  --md-on-surface-variant: #3f4949;
  --md-outline: #6f7979;
  --md-outline-variant: #bec8c9;
  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #eff5f4;
  --md-surface-container: #e9efef;
  --md-surface-container-high: #e3eaea;
  --md-surface-container-highest: #dee4e4;
  --md-inverse-surface: #2b3232;
  --md-inverse-on-surface: #ecf2f1;
  --md-inverse-primary: #80d4d5;

  --elev-1: 0 1px 2px rgba(0,0,0,.3), 0 1px 3px 1px rgba(0,0,0,.15);
  --elev-2: 0 1px 2px rgba(0,0,0,.3), 0 2px 6px 2px rgba(0,0,0,.15);
  --elev-3: 0 1px 3px rgba(0,0,0,.3), 0 4px 8px 3px rgba(0,0,0,.15);

  --ease-standard: cubic-bezier(.2, 0, 0, 1);
  --ease-spring: cubic-bezier(.34, 1.56, .64, 1);

  --font-sans: 'Google Sans Text', 'Noto Sans SC', -apple-system, 'Segoe UI', sans-serif;
  --font-mono: ui-monospace, 'SF Mono', 'Cascadia Code', Consolas, monospace;
}

/* ---------------- M3 暗色方案 ---------------- */
[data-theme="dark"] {
  --md-primary: #80d4d5;
  --md-on-primary: #003738;
  --md-primary-container: #004f51;
  --md-on-primary-container: #9cf1f2;
  --md-secondary: #b0cbcd;
  --md-on-secondary: #1c3436;
  --md-secondary-container: #334b4d;
  --md-on-secondary-container: #cce8e9;
  --md-tertiary: #e8c28c;
  --md-on-tertiary: #422d00;
  --md-tertiary-container: #5d4212;
  --md-on-tertiary-container: #ffdfa6;
  --md-error: #ffb4ab;
  --md-on-error: #690005;
  --md-error-container: #93000a;
  --md-on-error-container: #ffdad6;
  --md-surface: #0e1515;
  --md-on-surface: #dee4e4;
  --md-surface-variant: #3f4949;
  --md-on-surface-variant: #bec8c9;
  --md-outline: #899393;
  --md-outline-variant: #3f4949;
  --md-surface-container-lowest: #090f0f;
  --md-surface-container-low: #161d1d;
  --md-surface-container: #1a2121;
  --md-surface-container-high: #252b2b;
  --md-surface-container-highest: #303636;
  --md-inverse-surface: #dee4e4;
  --md-inverse-on-surface: #2b3232;
  --md-inverse-primary: #00696d;
  --elev-1: 0 1px 2px rgba(0,0,0,.5), 0 1px 3px 1px rgba(0,0,0,.2);
  --elev-2: 0 1px 2px rgba(0,0,0,.5), 0 2px 6px 2px rgba(0,0,0,.25);
  --elev-3: 0 2px 4px rgba(0,0,0,.5), 0 4px 10px 3px rgba(0,0,0,.3);
}

/* ---------------- 基础 ---------------- */
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body {
  font-family: var(--font-sans);
  background: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  transition: background-color .35s var(--ease-standard), color .35s var(--ease-standard);
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; color: inherit; }
::selection { background: var(--md-primary-container); color: var(--md-on-primary-container); }
:focus-visible { outline: 2px solid var(--md-primary); outline-offset: 2px; border-radius: 4px; }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-thumb { background: var(--md-outline-variant); border-radius: 8px; border: 2px solid var(--md-surface); }
::-webkit-scrollbar-track { background: transparent; }

/* Material Symbols Rounded 图标 */
.msr {
  font-family: 'Material Symbols Rounded';
  font-weight: normal; font-style: normal; font-size: 24px; line-height: 1;
  letter-spacing: normal; text-transform: none; display: inline-block; white-space: nowrap;
  direction: ltr; -webkit-font-feature-settings: 'liga'; -webkit-font-smoothing: antialiased;
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  transition: font-variation-settings .35s var(--ease-standard);
  user-select: none;
}
.msr.filled { font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24; }

/* ---------------- 阅读进度条 ---------------- */
.progress { position: fixed; top: 0; left: 0; right: 0; height: 3px; z-index: 90; pointer-events: none; }
.progress span { display: block; height: 100%; background: var(--md-primary); transform: scaleX(0); transform-origin: 0 50%; }

/* ---------------- 顶部应用栏 ---------------- */
.top-app-bar {
  position: fixed; top: 0; left: 0; right: 0; height: 64px; z-index: 80;
  background: var(--md-surface);
  transition: background-color .3s var(--ease-standard), box-shadow .3s var(--ease-standard);
}
.top-app-bar.scrolled { background: var(--md-surface-container); box-shadow: var(--elev-1); }
.app-bar-inner { max-width: 1240px; height: 100%; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; gap: 12px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark { width: 34px; height: 34px; border-radius: 10px; object-fit: cover; }
.brand-name { font-weight: 600; font-size: 1.05rem; opacity: 0; transform: translateY(5px); transition: .4s var(--ease-standard); }
.top-app-bar.scrolled .brand-name { opacity: 1; transform: none; }
.app-bar-actions { margin-left: auto; display: flex; gap: 4px; }
.app-nav { margin-left: auto; display: none; gap: 4px; }
.app-nav + .app-bar-actions { margin-left: 0; }
.app-nav a {
  padding: 8px 18px; border-radius: 20px; font-size: .875rem; font-weight: 500;
  color: var(--md-on-surface-variant); position: relative; transition: color .25s, background-color .25s;
}
.app-nav a:hover { background: color-mix(in srgb, var(--md-on-surface-variant) 8%, transparent); }
.app-nav a.active { color: var(--md-primary); background: var(--md-secondary-container); }

/* ---------------- 导航栏（桌面） ---------------- */
.nav-rail {
  display: none; position: fixed; left: 0; top: 0; bottom: 0; width: 88px; z-index: 70;
  flex-direction: column; align-items: center; gap: 10px; padding: 92px 0 24px;
}
.rail-item { display: flex; flex-direction: column; align-items: center; gap: 5px; color: var(--md-on-surface-variant); width: 72px; padding: 4px 0; border-radius: 16px; transition: color .25s; }
.rail-icon { width: 56px; height: 34px; border-radius: 17px; display: grid; place-items: center; transition: background-color .35s var(--ease-standard); }
.rail-icon .msr { font-size: 24px; }
.rail-label { font-size: .7rem; font-weight: 500; }
.rail-item:hover { color: var(--md-on-surface); }
.rail-item.active { color: var(--md-on-secondary-container); }
.rail-item.active .rail-icon { background: var(--md-secondary-container); }

/* ---------------- 底部导航栏（移动端） ---------------- */
.bottom-nav {
  position: fixed; left: 12px; right: 12px; bottom: 12px; height: 72px; z-index: 80;
  background: var(--md-surface-container); box-shadow: var(--elev-2); border-radius: 28px;
  display: none; align-items: stretch; padding: 8px;
}
.bn-item { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; font-size: .6875rem; font-weight: 500; color: var(--md-on-surface-variant); }
.bn-icon { width: 64px; height: 32px; border-radius: 16px; display: grid; place-items: center; transition: background-color .35s var(--ease-standard); }
.bn-icon .msr { font-size: 22px; }
.bn-item.active { color: var(--md-on-secondary-container); }
.bn-item.active .bn-icon { background: var(--md-secondary-container); }

/* ---------------- 主布局 ---------------- */
.shell { max-width: 1240px; margin: 0 auto; padding: 96px 24px 64px; }

.view { display: none; }
.view.active { display: block; animation: view-in .5s var(--ease-standard); }
@keyframes view-in { from { opacity: 0; transform: translateY(18px); } }

/* ---------------- Hero ---------------- */
.hero { display: grid; grid-template-columns: minmax(0, 1fr) minmax(280px, 380px); align-items: center; gap: 48px; padding: 40px 0 8px; }
.hero-eyebrow { font-size: .75rem; font-weight: 600; letter-spacing: .18em; color: var(--md-primary); margin-bottom: 22px; }
.hero-title { font-size: clamp(2rem, 1.2rem + 3.4vw, 3.3rem); line-height: 1.28; font-weight: 500; letter-spacing: .01em; }
.hl { border-radius: .22em; padding: .02em .18em; -webkit-box-decoration-break: clone; box-decoration-break: clone; }
.hl-primary { background: var(--md-primary-container); color: var(--md-on-primary-container); }
.hl-tertiary { background: var(--md-tertiary-container); color: var(--md-on-tertiary-container); }
.hero-sub { margin-top: 22px; max-width: 34em; color: var(--md-on-surface-variant); font-size: 1.02rem; }
.hero-actions { display: flex; gap: 12px; margin-top: 30px; flex-wrap: wrap; }
.hero-meta { margin-top: 28px; font-size: .8125rem; color: var(--md-on-surface-variant); display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.hero-meta .msr { font-size: 17px; }
.hero-meta .sep { color: var(--md-outline-variant); margin: 0 4px; }

/* Hero 装饰形状 */
.hero-shapes { position: relative; height: 380px; }
.par { position: absolute; transition: transform .7s var(--ease-standard); will-change: transform; }
.shape { position: relative; }
.shape-blob { width: 200px; height: 200px; background: var(--md-primary); animation: blobmorph 14s ease-in-out infinite alternate; }
@keyframes blobmorph {
  0%   { border-radius: 58% 42% 55% 45% / 45% 55% 42% 58%; }
  50%  { border-radius: 42% 58% 40% 60% / 58% 42% 55% 45%; transform: rotate(6deg); }
  100% { border-radius: 55% 45% 58% 42% / 42% 58% 45% 55%; transform: rotate(-4deg); }
}
.shape-ring { width: 140px; height: 140px; border: 2.5px dashed var(--md-outline); border-radius: 50%; animation: spin 46s linear infinite; }
.shape-pill { width: 88px; height: 34px; background: var(--md-tertiary); border-radius: 17px; transform: rotate(-26deg); animation: floaty 7s ease-in-out infinite; }
@keyframes floaty { 50% { transform: rotate(-26deg) translateY(-14px); } }
.shape-cookie {
  width: 108px; height: 108px; background: var(--md-secondary-container);
  clip-path: polygon(100% 50%, 93.3% 75%, 75% 93.3%, 50% 100%, 25% 93.3%, 6.7% 75%, 0% 50%, 6.7% 25%, 25% 6.7%, 50% 0%, 75% 6.7%, 93.3% 25%);
  animation: spin 34s linear infinite reverse;
}
.shape-dots { width: 118px; height: 88px; background-image: radial-gradient(var(--md-outline) 2px, transparent 2.6px); background-size: 17px 17px; animation: pulse 5s ease-in-out infinite; }
@keyframes pulse { 50% { opacity: .45; } }
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------------- 按钮体系（M3） ---------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 42px; padding: 0 24px; border-radius: 21px;
  font-size: .875rem; font-weight: 500; letter-spacing: .02em;
  position: relative; transition: box-shadow .25s var(--ease-standard), background-color .25s;
}
.btn .msr { font-size: 19px; }
.btn-filled { background: var(--md-primary); color: var(--md-on-primary); }
.btn-filled:hover { box-shadow: var(--elev-1); }
.btn-tonal { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.btn-text { background: transparent; color: var(--md-primary); padding: 0 16px; }

/* 状态层：hover 8% / active 12% */
.btn::after, .icon-btn::after, .chip::after, .bn-item::after, .app-nav a::after, .toc-link::after {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: currentColor; opacity: 0; pointer-events: none;
  transition: opacity .18s var(--ease-standard);
}
.btn:hover::after, .icon-btn:hover::after, .chip:hover::after, .app-nav a:hover::after { opacity: .08; }
.btn:active::after, .icon-btn:active::after, .chip:active::after { opacity: .12; }

.icon-btn {
  width: 42px; height: 42px; border-radius: 50%; display: grid; place-items: center;
  color: var(--md-on-surface-variant); position: relative; transition: color .2s;
}
.icon-btn:hover { color: var(--md-on-surface); }
.icon-btn .msr { font-size: 22px; }
.icon-btn.sm { width: 34px; height: 34px; }
.icon-btn.sm .msr { font-size: 18px; }
.icon-btn.big { width: 50px; height: 50px; background: var(--md-surface-container-high); }
.icon-btn.big.marked { background: var(--md-tertiary-container); color: var(--md-on-tertiary-container); }

/* ---------------- Chips（M3） ---------------- */
.chip {
  display: inline-flex; align-items: center; gap: 6px; height: 34px; padding: 0 14px;
  border-radius: 10px; border: 1px solid var(--md-outline-variant);
  background: transparent; color: var(--md-on-surface-variant);
  font-size: .8125rem; font-weight: 500; position: relative;
  transition: background-color .25s, color .25s, border-color .25s;
}
.chip .msr { font-size: 18px; }
.chip.selected { background: var(--md-secondary-container); color: var(--md-on-secondary-container); border-color: transparent; }
.chip-row { display: flex; gap: 8px; flex-wrap: wrap; margin: 20px 0 26px; }

.assist-chip {
  display: inline-flex; align-items: center; height: 26px; padding: 0 11px; border-radius: 8px;
  background: var(--md-secondary-container); color: var(--md-on-secondary-container);
  font-size: .75rem; font-weight: 500; white-space: nowrap;
}
.assist-chip-btn { cursor: pointer; border: none; font-family: inherit; transition: filter .2s; }
.assist-chip-btn:hover { filter: brightness(1.04) saturate(1.1); }

/* ---------------- 卡片 ---------------- */
.card { background: var(--md-surface-container-low); border-radius: 24px; }

/* ---------------- 置顶文章 ---------------- */
.featured {
  display: grid; grid-template-columns: 1.05fr 1fr; border-radius: 28px; overflow: hidden;
  background: var(--md-surface-container-low); margin: 52px 0;
  cursor: pointer; transition: box-shadow .35s var(--ease-standard), transform .35s var(--ease-standard);
}
.featured:hover { box-shadow: var(--elev-2); transform: translateY(-3px); }
.featured-media { position: relative; min-height: 300px; overflow: hidden; }
.featured-media img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; transition: transform .8s var(--ease-standard); }
.featured:hover .featured-media img { transform: scale(1.045); }
.featured-body { padding: 38px 36px; display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }
.featured-tag { display: inline-flex; align-items: center; gap: 6px; font-size: .75rem; font-weight: 600; letter-spacing: .1em; color: var(--md-primary); }
.featured-tag .msr { font-size: 16px; }
.featured-body h2 { font-size: clamp(1.35rem, 2.2vw, 1.8rem); line-height: 1.4; font-weight: 600; }
.featured-body > p { color: var(--md-on-surface-variant); font-size: .92rem; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.featured-meta { display: flex; align-items: center; gap: 8px; font-size: .78rem; color: var(--md-on-surface-variant); flex-wrap: wrap; }
.featured-meta .dot { color: var(--md-outline-variant); }
.featured-read { display: inline-flex; align-items: center; gap: 6px; color: var(--md-primary); font-weight: 600; font-size: .875rem; margin-top: 6px; }
.featured-read .msr { font-size: 18px; transition: transform .3s var(--ease-standard); }
.featured:hover .featured-read .msr { transform: translateX(4px); }

/* ---------------- 文章流 ---------------- */
.section-title { font-size: 1.4rem; font-weight: 600; display: flex; align-items: center; gap: 12px; }
.section-title::before { content: ""; width: 5px; height: 22px; border-radius: 3px; background: var(--md-primary); }
.feed-count { font-size: .78rem; font-weight: 500; color: var(--md-on-surface-variant); }
.feed-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; flex-wrap: wrap; }

.search-bar {
  display: flex; align-items: center; gap: 10px; height: 48px; padding: 0 6px 0 18px;
  border-radius: 24px; background: var(--md-surface-container-high); color: var(--md-on-surface-variant);
  border: 1px solid transparent; min-width: 280px; flex: 0 1 340px;
  transition: border-color .25s, background-color .25s;
}
.search-bar:focus-within { border-color: var(--md-primary); background: var(--md-surface-container-highest); }
.search-bar .msr { font-size: 21px; }
.search-bar input { flex: 1; min-width: 0; background: none; border: none; outline: none; color: var(--md-on-surface); font: .9rem var(--font-sans); }
.search-bar input::placeholder { color: var(--md-outline); }

.post-list { display: flex; flex-direction: column; gap: 14px; }
.post-item {
  display: flex; gap: 22px; align-items: center; padding: 18px; border-radius: 26px;
  background: var(--md-surface-container-low); cursor: pointer; position: relative;
  transition: background-color .3s, box-shadow .3s var(--ease-standard), transform .3s var(--ease-standard);
  animation: item-in .55s var(--ease-standard) both;
}
@keyframes item-in { from { opacity: 0; transform: translateY(16px); } }
.post-item:hover { background: var(--md-surface-container); box-shadow: var(--elev-1); transform: translateY(-2px); }
.pi-media { flex: none; width: 128px; height: 96px; border-radius: 18px; overflow: hidden; }
.pi-media img { width: 100%; height: 100%; object-fit: cover; transition: transform .6s var(--ease-standard); }
.post-item:hover .pi-media img { transform: scale(1.06); }
.pi-body { flex: 1; min-width: 0; }
.pi-meta { display: flex; align-items: center; gap: 8px; font-size: .75rem; color: var(--md-on-surface-variant); flex-wrap: wrap; }
.pi-meta .dot { color: var(--md-outline-variant); }
.pi-title { font-size: 1.12rem; font-weight: 600; margin: 7px 0 5px; transition: color .25s; }
.post-item:hover .pi-title { color: var(--md-primary); }
.pi-excerpt {
  font-size: .85rem; color: var(--md-on-surface-variant); display: -webkit-box;
  -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.pi-arrow { flex: none; color: var(--md-primary); font-size: 20px; opacity: 0; transform: translateX(-8px); transition: .3s var(--ease-standard); }
.post-item:hover .pi-arrow { opacity: 1; transform: none; }
mark { background: var(--md-primary-container); color: var(--md-on-primary-container); border-radius: 4px; padding: 0 2px; }

.empty-state { text-align: center; padding: 64px 0; color: var(--md-on-surface-variant); display: flex; flex-direction: column; align-items: center; gap: 12px; }
.empty-state .msr { font-size: 46px; color: var(--md-outline); }
.empty-state .btn { color: var(--md-primary); }

/* ---------------- 侧栏 ---------------- */
.home-grid { display: grid; grid-template-columns: minmax(0, 1fr) 320px; gap: 36px; align-items: start; }
.home-aside { display: flex; flex-direction: column; gap: 20px; position: sticky; top: 88px; }
.aside-card { padding: 26px; }
.aside-avatar { width: 76px; height: 76px; border-radius: 50%; object-fit: cover; margin-bottom: 14px; }
.aside-name { font-size: 1.15rem; font-weight: 600; }
.aside-bio { font-size: .83rem; color: var(--md-on-surface-variant); margin: 8px 0 14px; }
.aside-social { display: flex; gap: 4px; }
.aside-more { display: inline-block; margin-top: 14px; font-size: .82rem; font-weight: 600; color: var(--md-primary); }
.aside-card-title { display: flex; align-items: center; gap: 8px; font-size: .95rem; font-weight: 600; margin-bottom: 16px; }
.aside-card-title .msr { font-size: 19px; color: var(--md-tertiary); }
.aside-desc { font-size: .82rem; color: var(--md-on-surface-variant); margin-bottom: 14px; }
.pop-list { display: flex; flex-direction: column; }
.pop-item { display: flex; gap: 14px; align-items: baseline; padding: 11px 4px; border-radius: 12px; transition: background-color .2s; }
.pop-item:hover { background: var(--md-surface-container); }
.pop-rank { font: 700 .85rem var(--font-mono); color: var(--md-primary); flex: none; }
.pop-title { font-size: .85rem; font-weight: 500; line-height: 1.5; }
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud.static .chip { cursor: default; }

/* ---------------- 文章页 ---------------- */
.post-layout { display: grid; grid-template-columns: minmax(0, 1fr) 232px; gap: 48px; align-items: start; }
.post-back { margin-bottom: 26px; }
.post-meta-line { display: flex; align-items: center; gap: 9px; font-size: .8rem; color: var(--md-on-surface-variant); flex-wrap: wrap; }
.post-meta-line .dot { color: var(--md-outline-variant); }
.post-title { font-size: clamp(1.6rem, 3vw, 2.4rem); line-height: 1.35; font-weight: 600; margin: 18px 0 14px; }
.post-lead { font-size: 1.05rem; color: var(--md-on-surface-variant); border-left: 3px solid var(--md-primary); padding-left: 16px; margin-bottom: 30px; }
.post-cover { border-radius: 28px; overflow: hidden; margin-bottom: 40px; }
.post-cover img { width: 100%; aspect-ratio: 2 / 1; object-fit: cover; }

/* 正文排版 */
.prose { font-size: 1rem; line-height: 1.9; }
.prose > * { animation: rise .6s var(--ease-standard) both; }
.prose > *:nth-child(1) { animation-delay: .04s; } .prose > *:nth-child(2) { animation-delay: .09s; }
.prose > *:nth-child(3) { animation-delay: .14s; } .prose > *:nth-child(4) { animation-delay: .19s; }
.prose > *:nth-child(5) { animation-delay: .24s; } .prose > *:nth-child(6) { animation-delay: .29s; }
.prose > *:nth-child(7) { animation-delay: .34s; } .prose > *:nth-child(8) { animation-delay: .39s; }
@keyframes rise { from { opacity: 0; transform: translateY(14px); } }
.prose p { margin-bottom: 1.35em; }
.prose h2, .prose h3 { scroll-margin-top: 96px; }
.prose h2 { display: flex; align-items: center; gap: 10px; font-size: 1.32rem; font-weight: 600; margin: 2em 0 .9em; }
.prose h2::before { content: ""; width: 5px; height: 20px; border-radius: 3px; background: var(--md-primary); flex: none; }
.prose h3 { font-size: 1.08rem; font-weight: 600; margin: 1.8em 0 .7em; color: var(--md-on-surface); }
.prose strong { font-weight: 600; }
.prose ul { margin: 0 0 1.35em; padding-left: 6px; list-style: none; }
.prose li { position: relative; padding-left: 22px; margin-bottom: .5em; }
.prose li::before { content: ""; position: absolute; left: 2px; top: .72em; width: 7px; height: 7px; border-radius: 50%; background: var(--md-tertiary); }
.prose blockquote {
  background: var(--md-surface-container); border-left: 4px solid var(--md-primary);
  border-radius: 4px 18px 18px 4px; padding: 16px 22px; margin: 1.6em 0;
  color: var(--md-on-surface); font-weight: 500;
}
.prose code { font-family: var(--font-mono); font-size: .86em; background: var(--md-secondary-container); color: var(--md-on-secondary-container); padding: 2px 7px; border-radius: 6px; }
.prose figure { margin: 1.8em 0; }
.prose figure img { border-radius: 20px; width: 100%; }
.prose figcaption { text-align: center; font-size: .78rem; color: var(--md-on-surface-variant); margin-top: 10px; }

/* 代码块卡片 */
.code-card { border-radius: 18px; overflow: hidden; background: var(--md-surface-container-high); margin: 1.6em 0; border: 1px solid var(--md-outline-variant); }
.code-head { display: flex; align-items: center; justify-content: space-between; padding: 8px 10px 8px 18px; border-bottom: 1px solid var(--md-outline-variant); }
.code-head > span { font: 600 .72rem var(--font-mono); letter-spacing: .12em; text-transform: uppercase; color: var(--md-on-surface-variant); }
.code-copy { display: inline-flex; align-items: center; gap: 5px; font-size: .75rem; font-weight: 500; color: var(--md-primary); padding: 5px 10px; border-radius: 8px; transition: background-color .2s; }
.code-copy:hover { background: color-mix(in srgb, var(--md-primary) 10%, transparent); }
.code-copy .msr { font-size: 15px; }
.code-card pre { padding: 18px 20px; overflow-x: auto; }
.code-card pre code { background: none; color: var(--md-on-surface); padding: 0; font-size: .82rem; line-height: 1.75; }

/* 目录 */
.toc { position: sticky; top: 96px; background: var(--md-surface-container-low); border-radius: 20px; padding: 20px 14px; }
.toc-title { font-size: .78rem; font-weight: 600; letter-spacing: .1em; color: var(--md-on-surface-variant); margin: 0 0 10px 12px; }
.toc-link { display: block; width: 100%; text-align: left; padding: 7px 12px; border-radius: 10px; font-size: .8rem; color: var(--md-on-surface-variant); position: relative; border-left: 2px solid transparent; transition: color .2s, background-color .2s; }
.toc-link.lv3 { padding-left: 26px; font-size: .76rem; }
.toc-link:hover { background: var(--md-surface-container); color: var(--md-on-surface); }
.toc-link.active { color: var(--md-primary); background: var(--md-surface-container); border-left-color: var(--md-primary); font-weight: 600; }

/* 文章操作区 */
.post-actions { display: flex; align-items: center; gap: 10px; margin: 52px 0 0; }
.btn-like { position: relative; padding: 0 22px; }
.btn-like .msr { font-size: 20px; }
.btn-like.liked { background: var(--md-primary); color: var(--md-on-primary); }
.btn-like.liked .msr { font-variation-settings: 'FILL' 1, 'wght' 400, 'GRAD' 0, 'opsz' 24; animation: pop .5s var(--ease-spring); }
@keyframes pop { 40% { transform: scale(1.3); } }
.burst-dot { position: absolute; left: 50%; top: 50%; width: 8px; height: 8px; border-radius: 50%; pointer-events: none; animation: burst .65s var(--ease-standard) forwards; }
@keyframes burst { to { transform: translate(var(--bx), var(--by)) scale(0); opacity: 0; } }

.post-nav { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-top: 44px; padding-top: 36px; border-top: 1px solid var(--md-outline-variant); }
.pn-card { display: flex; flex-direction: column; gap: 6px; padding: 20px 22px; border-radius: 20px; border: 1px solid var(--md-outline-variant); transition: background-color .25s, border-color .25s; }
.pn-card:hover { background: var(--md-surface-container-low); border-color: var(--md-outline); }
.pn-card.next { text-align: right; align-items: flex-end; }
.pn-label { font-size: .72rem; font-weight: 600; letter-spacing: .08em; color: var(--md-primary); }
.pn-title { font-size: .9rem; font-weight: 500; line-height: 1.5; }

/* ---------------- 归档 ---------------- */
.page-head { margin-bottom: 40px; }
.page-head h1 { font-size: 2.1rem; font-weight: 600; }
.page-head p { color: var(--md-on-surface-variant); margin-top: 6px; font-size: .9rem; }
.arch-year { margin-bottom: 44px; }
.arch-year-num { font-size: 2.6rem; font-weight: 700; color: var(--md-primary); opacity: .22; line-height: 1; margin-bottom: 6px; }
.arch-rows { display: flex; flex-direction: column; gap: 4px; }
.arch-item { display: flex; align-items: center; gap: 18px; padding: 15px 18px; border-radius: 18px; transition: background-color .2s; }
.arch-item:hover { background: var(--md-surface-container-low); }
.arch-item time { font: 500 .8rem var(--font-mono); color: var(--md-on-surface-variant); flex: none; }
.arch-item h3 { flex: 1; font-size: .95rem; font-weight: 500; min-width: 0; }
.arch-item:hover h3 { color: var(--md-primary); }

/* ---------------- 关于页 ---------------- */
.about-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.about-intro { grid-column: 1 / -1; display: flex; gap: 32px; padding: 36px; align-items: center; }
.about-avatar { width: 116px; height: 116px; border-radius: 50%; object-fit: cover; flex: none; border: 4px solid var(--md-surface-container-highest); }
.about-intro-text h2 { font-size: 1.6rem; font-weight: 600; }
.about-intro-text h2 small { font-size: .85rem; font-weight: 400; color: var(--md-on-surface-variant); margin-left: 8px; }
.about-role { color: var(--md-primary); font-weight: 500; font-size: .88rem; margin: 6px 0 14px; }
.about-intro-text > p:not(.about-role) { color: var(--md-on-surface-variant); font-size: .92rem; margin-bottom: 14px; }
.about-stats { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); padding: 14px 0; }
.about-stats > div { text-align: center; padding: 14px; display: flex; flex-direction: column; gap: 2px; }
.about-stats > div:not(:last-child) { border-right: 1px solid var(--md-outline-variant); }
.about-stats b { font-size: 1.9rem; font-weight: 700; color: var(--md-primary); }
.about-stats span { font-size: .8rem; color: var(--md-on-surface-variant); }
.about-block { padding: 30px; }
.about-block > p { color: var(--md-on-surface-variant); font-size: .92rem; margin-bottom: 18px; }

/* 时间线（数据来自 Workers KV） */
.timeline { position: relative; padding-left: 30px; }
.timeline::before { content: ""; position: absolute; left: 8px; top: 8px; bottom: 8px; width: 2px; background: var(--md-outline-variant); border-radius: 2px; }
.tl-item { position: relative; padding-bottom: 26px; }
.tl-item:last-child { padding-bottom: 4px; }
.tl-item::before { content: ""; position: absolute; left: -30px; top: 7px; width: 14px; height: 14px; border-radius: 50%; background: var(--md-surface-container-low); border: 3px solid var(--md-outline); }
.tl-item.now::before { border-color: var(--md-primary); background: var(--md-primary); }
.tl-item b { display: block; color: var(--md-primary); font-size: .95rem; margin-bottom: 3px; }
.tl-item p { font-size: .88rem; color: var(--md-on-surface-variant); }
.tl-empty { font-size: .85rem; color: var(--md-on-surface-variant); padding-left: 2px; }

.about-photos { grid-column: 1 / -1; display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.about-photos figure { display: flex; flex-direction: column; align-items: center; gap: 10px; }
.about-photos img { border-radius: 16px; border: 6px solid var(--md-surface-container-highest); transition: transform .35s var(--ease-standard); }
.about-photos figure:nth-child(1) img { transform: rotate(-2.5deg); }
.about-photos figure:nth-child(2) img { transform: rotate(1.8deg) translateY(8px); }
.about-photos figure:nth-child(3) img { transform: rotate(-1.2deg) translateY(-4px); }
.about-photos figure:hover img { transform: rotate(0) translateY(0) scale(1.03); }
.about-photos figcaption { font-size: .78rem; color: var(--md-on-surface-variant); }
.about-contact { grid-column: 1 / -1; display: flex; flex-direction: column; align-items: flex-start; }
.about-contact .btn { align-self: flex-start; }

/* ---------------- 页脚 ---------------- */
.site-footer { margin-top: 88px; padding-top: 32px; border-top: 1px solid var(--md-outline-variant); text-align: center; color: var(--md-on-surface-variant); font-size: .8rem; }
.footer-links { margin-top: 10px; display: flex; justify-content: center; gap: 6px; flex-wrap: wrap; }
.footer-links a, .link-btn { padding: 4px 12px; border-radius: 14px; color: var(--md-on-surface-variant); font-size: .8rem; transition: background-color .2s, color .2s; }
.footer-links a:hover, .link-btn:hover { background: var(--md-surface-container); color: var(--md-on-surface); }

/* ---------------- FAB ---------------- */
.fab {
  position: fixed; right: 28px; bottom: 28px; z-index: 70; width: 56px; height: 56px;
  border-radius: 18px; background: var(--md-primary-container); color: var(--md-on-primary-container);
  display: grid; place-items: center; box-shadow: var(--elev-2);
  opacity: 0; transform: translateY(18px) scale(.8); pointer-events: none;
  transition: .4s var(--ease-spring);
}
.fab.show { opacity: 1; transform: none; pointer-events: auto; }
.fab:hover { box-shadow: var(--elev-3); }
.fab:active { transform: scale(.92); }

/* ---------------- Snackbar ---------------- */
.snackbar {
  position: fixed; left: 50%; bottom: 30px; z-index: 100;
  transform: translate(-50%, 24px); opacity: 0; pointer-events: none;
  display: flex; align-items: center; gap: 12px;
  background: var(--md-inverse-surface); color: var(--md-inverse-on-surface);
  border-radius: 12px; padding: 14px 18px; min-width: 288px; max-width: min(560px, calc(100vw - 40px));
  box-shadow: var(--elev-3); font-size: .875rem;
  transition: .4s var(--ease-standard);
}
.snackbar.show { transform: translate(-50%, 0); opacity: 1; pointer-events: auto; }
.snackbar .msr { font-size: 20px; color: var(--md-inverse-primary); }
.snackbar-action { margin-left: auto; color: var(--md-inverse-primary); font-weight: 600; font-size: .82rem; padding: 6px 10px; border-radius: 8px; white-space: nowrap; }

/* ---------------- 主题切换圆形揭示 ---------------- */
::view-transition-old(root), ::view-transition-new(root) { animation: none; mix-blend-mode: normal; }
::view-transition-old(root) { z-index: 1; }
::view-transition-new(root) { z-index: 2; }

/* ---------------- 响应式 ---------------- */
@media (min-width: 1280px) {
  .nav-rail { display: flex; }
  .app-nav { display: none !important; }
  .shell { margin-left: 88px; max-width: 1240px; }
}
@media (min-width: 1024px) and (max-width: 1279px) {
  .nav-rail { display: flex; width: 72px; }
  .rail-item { width: 60px; }
  .rail-label { display: none; }
  .app-nav { display: none !important; }
  .shell { margin-left: 72px; }
}
@media (min-width: 768px) and (max-width: 1023px) {
  .app-nav { display: flex; }
  .home-grid { grid-template-columns: 1fr; }
  .home-aside { position: static; grid-template-columns: repeat(2, 1fr); display: grid; }
  .post-layout { grid-template-columns: 1fr; }
  .post-aside { display: none; }
}
@media (max-width: 767px) {
  .shell { padding: 88px 16px 130px; }
  .app-nav { display: none !important; }
  .bottom-nav { display: flex; }
  .hero { grid-template-columns: 1fr; padding-top: 16px; }
  .hero-shapes { display: none; }
  .home-grid { grid-template-columns: 1fr; }
  .featured { grid-template-columns: 1fr; }
  .featured-media { min-height: 210px; }
  .featured-body { padding: 26px 22px; }
  .post-layout { grid-template-columns: 1fr; }
  .post-aside { display: none; }
  .pi-media { width: 92px; height: 72px; border-radius: 14px; }
  .pi-title { font-size: 1rem; }
  .pi-excerpt { -webkit-line-clamp: 1; }
  .post-nav { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-intro { flex-direction: column; text-align: center; align-items: center; }
  .about-intro-text .aside-social { justify-content: center; }
  .about-photos { grid-template-columns: 1fr; }
  .fab { right: 16px; bottom: 104px; }
  .snackbar { bottom: 104px; }
}

/* ---------------- 动效减弱 ---------------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  html { scroll-behavior: auto; }
}