/* A direct personal homepage: visible navigation, actionable topic links, and a quiet reading path. */
@view-transition { navigation: auto; }
@keyframes site-page-enter { from { opacity: 0; transform: translateY(.25rem); } to { opacity: 1; transform: translateY(0); } }
@keyframes site-page-exit { from { opacity: 1; transform: translateY(0); } to { opacity: 0; transform: translateY(-.1rem); } }
@media (prefers-reduced-motion: no-preference) {
  ::view-transition-old(root) { animation: 140ms cubic-bezier(.4, 0, 1, 1) both site-page-exit; }
  ::view-transition-new(root) { animation: 220ms cubic-bezier(.16, 1, .3, 1) both site-page-enter; }
}
:root {
  --canvas: #f1f3f7;
  --paper: #ffffff;
  --ink: #293241;
  --ink-soft: #566276;
  --muted: #5f6b7d;
  --line: #d8dfeb;
  --accent: #4169d5;
  --accent-dark: #3155b5;
  --accent-soft: #edf2fc;
  --action: #315fc8;
  --action-text: #ffffff;
  --focus-ring: #284fae;
  --content-max: 1080px;
  --page-gutter: clamp(1rem, 4vw, 2.5rem);
  --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  box-sizing: border-box;
  color-scheme: light;
  background: var(--canvas);
}
*, *::before, *::after { box-sizing: inherit; }
html { min-width: 320px; scroll-behavior: smooth; scroll-padding-top: 1rem; }
html.home-document { color-scheme: light dark; }
body {
  min-width: 320px;
  min-height: 100vh;
  margin: 0;
  color: var(--ink);
  background: var(--canvas) !important;
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-wrap: anywhere;
}
button, input, select, textarea { max-width: 100%; color: var(--ink); font: inherit; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: .18em; transition: color .16s ease, background-color .16s ease, border-color .16s ease; }
a:hover { color: var(--accent-dark); }
:focus-visible { outline: 3px solid var(--focus-ring); outline-offset: 3px; }
img, video { max-width: 100%; }
#wrapper {
  display: grid;
  width: 100%;
  min-height: 100vh;
  grid-template-columns: minmax(0, 1fr);
  grid-template-rows: auto minmax(0, 1fr) auto auto;
  align-content: start;
  isolation: isolate;
  background: transparent;
}
#wrapper::after { display: none !important; content: none !important; }
.skip-link {
  position: fixed;
  z-index: 10005;
  top: .65rem;
  left: .65rem;
  padding: .7rem .9rem;
  transform: translateY(-160%);
  color: #fff;
  background: var(--ink);
  font-weight: 700;
}
.skip-link:focus { transform: translateY(0); }
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}
#wrapper > #header {
  position: sticky;
  z-index: 1000;
  top: 0;
  display: grid !important;
  width: min(var(--content-max), calc(100% - 2 * var(--page-gutter)));
  min-width: 0;
  min-height: 68px;
  grid-column: 1;
  grid-row: 1;
  grid-template-columns: auto minmax(0, 1fr);
  grid-template-areas: "logo nav";
  align-items: center;
  gap: .75rem clamp(1rem, 3vw, 2.25rem);
  margin: 0 auto;
  padding: .5rem 0;
  border: 0;
  border-bottom: 1px solid var(--line);
  background: var(--canvas);
  box-shadow: none;
}
#wrapper > #header.header-with-search {
  grid-template-columns: auto minmax(0, 1fr) minmax(14rem, 24rem);
  grid-template-areas: "logo nav search";
}
#header .logo {
  display: inline-flex;
  grid-area: logo;
  min-height: 44px;
  align-items: center;
  border: 0;
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: -.02em;
  text-decoration: none;
  text-transform: none;
  white-space: nowrap;
}
#nav {
  position: static !important;
  display: block !important;
  width: auto;
  height: auto !important;
  min-height: 0 !important;
  grid-area: nav;
  justify-self: center;
  margin: 0;
  padding: 0;
  overflow: visible;
  border: 0;
  background: transparent;
  line-height: 1.4;
}
#nav .links {
  display: flex !important;
  height: auto;
  align-items: center;
  justify-content: center;
  gap: .25rem;
  margin: 0;
  padding: 0;
  list-style: none;
}
#nav .links li { display: block; height: auto; margin: 0; padding: 0; border: 0; }
#nav .links a {
  display: inline-flex;
  min-width: 3.5rem;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  border: 0;
  border-radius: 5px;
  padding: .55rem .8rem;
  color: var(--ink-soft);
  background: transparent;
  font-family: var(--font-sans);
  font-size: .93rem;
  font-weight: 650;
  letter-spacing: 0;
  text-decoration: none;
  text-transform: none;
}
#nav .links a:hover, #nav .links a[aria-current="page"] { color: var(--accent-dark); background: var(--accent-soft); }
#nav .links a[aria-current="page"] { box-shadow: inset 0 -2px var(--accent); }
.header-search {
  display: grid;
  width: 100%;
  min-width: 0;
  grid-area: search;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: .4rem;
  margin: 0;
  padding: .2rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: var(--paper);
}
.header-search:focus-within { outline: 3px solid var(--focus-ring); outline-offset: 2px; }
.header-search input[type="search"] {
  width: 100%;
  min-width: 0;
  min-height: 44px;
  border: 0;
  padding: .35rem .65rem;
  color: var(--ink);
  background: transparent;
  font-size: .9rem;
}
.header-search input::placeholder { color: var(--muted); opacity: 1; }
.header-search button {
  min-width: 3.5rem;
  min-height: 44px;
  border: 0;
  border-radius: 5px;
  padding: .35rem .75rem;
  color: var(--action-text);
  background: var(--action);
  font-size: .88rem;
  font-weight: 700;
  cursor: pointer;
}
.header-search button:hover { background: var(--accent-dark); }
.home-content-shell {
  display: grid;
  width: min(var(--content-max), calc(100% - 2 * var(--page-gutter)));
  grid-column: 1;
  grid-row: 2;
  grid-template-columns: minmax(0, 1fr);
  align-content: start;
  gap: clamp(2rem, 4.5vw, 3.25rem);
  margin: clamp(2rem, 5vw, 3.5rem) auto 2.5rem;
}
#intro { min-width: 0; margin: 0; padding: 0 0 clamp(1.5rem, 4vw, 2.5rem); border-bottom: 1px solid var(--line); color: var(--ink); background: transparent; text-align: left; }
#intro h1 {
  max-width: 19ch;
  margin: 0;
  color: var(--ink);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 730;
  letter-spacing: -.055em;
  line-height: 1.13;
  text-wrap: balance;
}
#intro > p { max-width: 56ch; margin: 1.1rem 0 0; color: var(--ink-soft); font-size: clamp(1rem, 1.5vw, 1.12rem); line-height: 1.8; }
.home-focus { min-width: 0; }
.home-focus h2 { margin: 0 0 1rem; color: var(--ink); font-size: clamp(1.3rem, 2.2vw, 1.65rem); font-weight: 700; letter-spacing: -.03em; line-height: 1.3; }
.focus-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 14rem), 1fr)); gap: .8rem; }
.focus-link {
  display: flex;
  min-width: 0;
  min-height: 6rem;
  flex-direction: column;
  justify-content: space-between;
  gap: .75rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  padding: 1rem 1.1rem;
  color: var(--ink);
  background: var(--paper);
  text-decoration: none;
}
.focus-link:hover { color: var(--ink); border-color: var(--accent); background: var(--accent-soft); }
.focus-link:focus-visible { outline-offset: 3px; }
.focus-link-title { color: var(--ink); font-size: 1.08rem; font-weight: 700; letter-spacing: -.02em; }
.focus-link-action { color: var(--accent-dark); font-size: .88rem; font-weight: 650; }
#main {
  width: 100%;
  min-width: 0;
  margin: 0;
  padding: 0;
  overflow: visible;
  color: var(--ink);
  background: transparent;
  box-shadow: none;
}
.section-heading { display: flex; align-items: center; justify-content: space-between; gap: 1rem; margin: 0 0 .85rem; }
.section-heading h2 { margin: 0; color: var(--ink); font-size: clamp(1.35rem, 2.3vw, 1.7rem); font-weight: 700; letter-spacing: -.035em; line-height: 1.3; }
.section-heading > a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  border-radius: 5px;
  padding: .4rem .6rem;
  color: var(--accent-dark);
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
}
.section-heading > a:hover { background: var(--accent-soft); }
#main > .posts { display: grid; gap: .75rem; width: 100%; margin: 0; padding: 0; }
#main > .posts > article {
  display: grid;
  min-width: 0;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: .5rem 1rem;
  margin: 0;
  padding: 1.15rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 7px;
  color: var(--ink);
  background: var(--paper);
}
#main > .posts > article > header { grid-column: 1; min-width: 0; margin: 0; padding: 0; border: 0; background: transparent; text-align: left; }
#main > .posts > article > header h3 { margin: .1rem 0 0; color: var(--ink); font-size: 1.08rem; font-weight: 700; letter-spacing: -.02em; line-height: 1.45; }
#main > .posts > article > header h3 a { color: inherit; text-decoration: none; }
#main > .posts > article > header h3 a:hover { color: var(--accent); }
#main > .posts > article > .post-meta { grid-column: 2; grid-row: 1; justify-self: end; margin: .1rem 0 0; color: var(--muted); font-size: .82rem; }
#main > .posts > article > p:not(.post-meta) { grid-column: 1; grid-row: 2; max-width: 70ch; margin: .1rem 0 0; color: var(--ink-soft); line-height: 1.75; }
#main > .posts > article > .text-link { display: inline-flex; min-height: 44px; grid-column: 2; grid-row: 2; align-items: center; justify-self: end; border-radius: 5px; padding: .4rem .55rem; color: var(--accent-dark); font-weight: 700; text-decoration: none; white-space: nowrap; }
#main > .posts > article > .text-link:hover { background: var(--accent-soft); }
#main > .posts > article.empty-state { grid-template-columns: minmax(0, 1fr) auto; gap: .5rem 1rem; }
#main > .posts > article.empty-state h3 { grid-column: 1; margin: 0; color: var(--ink); font-size: 1.03rem; font-weight: 700; }
#main > .posts > article.empty-state p { grid-column: 1; margin: .1rem 0 0; color: var(--ink-soft); }
.button-secondary {
  display: inline-flex;
  min-height: 44px;
  grid-column: 2;
  grid-row: 1 / span 2;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--action);
  border-radius: 5px;
  padding: .55rem .9rem;
  color: var(--action-text);
  background: var(--action);
  font-size: .9rem;
  font-weight: 700;
  text-decoration: none;
  white-space: nowrap;
}
.button-secondary:hover { color: var(--action-text); border-color: var(--accent-dark); background: var(--accent-dark); }
.date { display: inline-block; margin: 0 0 .15rem; color: var(--muted); font-size: .8rem; font-weight: 600; }
.post-meta { display: flex; flex-wrap: wrap; align-items: center; gap: .4rem .7rem; margin: .5rem 0; color: var(--muted); font-size: .82rem; }
#footer {
  display: block;
  width: min(var(--content-max), calc(100% - 2 * var(--page-gutter)));
  grid-column: 1;
  grid-row: 3;
  margin: 0 auto;
  padding: 1rem 0;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  background: transparent;
}
#footer .split.contact { display: block; max-width: none; margin: 0; border: 0; }
#footer .split.contact > section { width: auto; min-width: 0; margin: 0; padding: 0; border: 0; }
#footer h3 { margin: 0 0 .3rem; color: var(--ink); font-size: .78rem; font-weight: 700; text-transform: none; }
#footer p { margin: 0; color: var(--ink-soft); font-size: .78rem; line-height: 1.7; }
#footer a { color: var(--ink-soft); }
#footer a:hover { color: var(--accent-dark); }
#footer img { margin-right: .25rem; vertical-align: middle; }
#copyright { width: min(var(--content-max), calc(100% - 2 * var(--page-gutter))); grid-column: 1; grid-row: 4; margin: 0 auto; padding: .55rem 0 .9rem; border-top: 1px solid var(--line); color: var(--muted); background: transparent; font-size: .78rem; text-align: left; }
#copyright ul { display: flex; flex-wrap: wrap; gap: .5rem 1rem; margin: 0; padding: 0; list-style: none; }
#copyright li { border: 0; }
#reading-progress { position: fixed; z-index: 10006; inset: 0 auto auto 0; width: 100%; height: 2px; transform: scaleX(0); transform-origin: left center; background: var(--accent); pointer-events: none; }
@media (max-width: 680px) {
  :root { --page-gutter: 1rem; }
  #wrapper > #header, #wrapper > #header.header-with-search {
    min-height: 0;
    grid-template-columns: auto minmax(0, 1fr);
    grid-template-areas: "logo nav";
    gap: .25rem .65rem;
    padding: .35rem 0;
  }
  #wrapper > #header.header-with-search { grid-template-areas: "logo nav" "search search"; padding-bottom: .6rem; }
  #nav { justify-self: end; }
  #nav .links { justify-content: flex-end; gap: .1rem; }
  #nav .links a { min-width: 3rem; padding-inline: .5rem; font-size: .88rem; }
  #header .header-search { width: 100%; max-width: none; }
  .home-content-shell { gap: 2rem; margin-top: 2rem; margin-bottom: 1.75rem; }
  #intro { padding-bottom: 1.5rem; }
  #intro h1 { max-width: 15ch; font-size: clamp(2rem, 8vw, 2.75rem); line-height: 1.18; }
  #intro > p { margin-top: .8rem; font-size: 1rem; }
  .home-focus h2 { margin-bottom: .7rem; }
  .focus-list { grid-template-columns: minmax(0, 1fr); gap: .55rem; }
  .focus-link { min-height: 4.6rem; flex-direction: row; align-items: center; gap: .75rem; padding: .75rem .9rem; }
  .focus-link-action { text-align: right; }
  #main > .posts > article { grid-template-columns: minmax(0, 1fr); align-items: start; gap: .4rem; padding: 1rem; }
  #main > .posts > article > header, #main > .posts > article > .post-meta, #main > .posts > article > p:not(.post-meta), #main > .posts > article > .text-link { grid-column: 1; grid-row: auto; justify-self: start; }
  #main > .posts > article > .post-meta { margin-top: .05rem; }
  #main > .posts > article.empty-state { grid-template-columns: minmax(0, 1fr); gap: .4rem; }
  #main > .posts > article.empty-state h3, #main > .posts > article.empty-state p, #main > .posts > article.empty-state .button-secondary { grid-column: 1; grid-row: auto; justify-self: start; }
  #main > .posts > article.empty-state .button-secondary { margin-top: .25rem; }
  .section-heading { align-items: center; }
  #footer, #copyright { width: calc(100% - 2 * var(--page-gutter)); }
}
@media (prefers-color-scheme: dark) {
  html.home-document {
    color-scheme: dark;
    --canvas: #1e2533;
    --paper: #282f3f;
    --ink: #edf1f8;
    --ink-soft: #c3ccda;
    --muted: #a2adbd;
    --line: #3c4659;
    --accent: #aec2ff;
    --accent-dark: #d0dcff;
    --accent-soft: #303a51;
    --action: #9fb6ff;
    --action-text: #1d2942;
    --focus-ring: #f4d17a;
  }
}
html.home-document[data-color-fallback="dark"] { color-scheme: dark; }
html.home-document[data-color-fallback="dark"] body { color: var(--ink) !important; background: var(--canvas) !important; }
html.home-document[data-color-fallback="dark"] .focus-link,
html.home-document[data-color-fallback="dark"] #main > .posts > article,
html.home-document[data-color-fallback="dark"] .header-search { color: var(--ink); background: var(--paper) !important; }
html.home-document[data-color-fallback="dark"] :focus-visible { outline-color: var(--focus-ring); }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  ::view-transition-old(root), ::view-transition-new(root) { animation: none !important; }
}