/* ---------- Tokens ---------- */
/* 与简历同一套视觉：象牙白底、墨色正文、衬线排版、大量留白。
   陶土色只用于插画里的一颗种子、链接和列表符号。 */
:root {
  --bg: #faf9f5;     /* 象牙白 */
  --ink: #141413;    /* 墨 */
  --muted: #5e5d59;  /* 灰 */
  --faint: #8a8880;  /* 浅灰 */
  --line: #d6d2c6;   /* 线 */
  --clay: #c96442;   /* 陶土 */

  /* 西文与简历同用 Palatino；中文用思源宋体（Noto Serif SC），加载不到时退回本机宋体。 */
  --latin: "Palatino Linotype", Palatino, "Book Antiqua", "TeX Gyre Pagella", Georgia;
  --cjk: "Noto Serif SC", "Source Han Serif SC", "Noto Serif CJK SC", "Songti SC", SimSun, STSong;
  --serif: var(--latin), var(--cjk), serif;

  --measure: 36rem;
  --wrap: 60rem;
  color-scheme: light;
}

/* ---------- Base ---------- */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.0625rem;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
::selection { background: var(--line); }

a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 1px solid var(--clay); outline-offset: 3px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: 2.5rem; }

.skip-link {
  position: absolute; left: 1rem; top: -4rem; z-index: 10;
  padding: .4rem .9rem;
  background: var(--ink); color: var(--bg); font-size: .9375rem;
}
.skip-link:focus { top: 1rem; }

/* ---------- Header ---------- */
.header-inner { display: flex; align-items: baseline; gap: 1.5rem; padding-block: 1.75rem; }
.site-name { font-size: 1.0625rem; letter-spacing: .02em; }
nav { display: flex; gap: 1.75rem; margin-left: auto; font-size: .9375rem; }
nav a {
  color: var(--muted);
  letter-spacing: .08em;
  text-decoration: underline transparent;
  text-decoration-thickness: 1px;
  text-underline-offset: .4em;
  transition: color .15s, text-decoration-color .15s;
}
nav a:hover { color: var(--ink); text-decoration-color: var(--line); }

/* 中英切换：当前语言用墨色，另一种用浅灰，和导航之间用一条细竖线隔开。 */
.lang-toggle {
  display: inline-flex; align-items: baseline; gap: .35rem;
  padding: 0 0 0 1.5rem; border: 0; border-left: 1px solid var(--line);
  background: none; cursor: pointer;
  font: inherit; font-size: .875rem; letter-spacing: .04em; color: var(--faint);
}
.lang-toggle .lang-sep { color: var(--line); }
.lang-toggle span { transition: color .15s; }
.lang-toggle:hover span:not(.lang-sep) { color: var(--muted); }
html[lang="zh-CN"] .lang-zh, html[lang="en"] .lang-en { color: var(--ink) !important; }
.lang-toggle:focus-visible { outline: 1px solid var(--clay); outline-offset: 4px; }

/* ---------- Hero ---------- */
/* 左边姓名，右边一颗飘落的种子。 */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-areas: "name art" "intro intro";
  align-items: center;
  column-gap: 2rem;
  padding-top: clamp(3rem, 9vw, 6.5rem);
  padding-bottom: clamp(3rem, 7vw, 5rem);
}
.hero-name { grid-area: name; }
.hero-intro { grid-area: intro; }
h1 {
  margin: 0;
  font-weight: 600;
  font-size: clamp(3.25rem, 9vw, 5.5rem);
  line-height: 1.1;
  letter-spacing: .06em;
  white-space: nowrap;
}
.name-en {
  margin: .5rem 0 0;
  font-style: italic;
  font-size: clamp(1.375rem, 3vw, 1.75rem);
  line-height: 1.3;
  color: var(--muted);
}
.lede {
  max-width: 40rem;
  margin: 2.25rem 0 0;
  font-size: 1.1875rem;
  line-height: 1.85;
  text-wrap: balance;
}
.links { list-style: none; display: flex; flex-wrap: wrap; gap: .5rem 1.75rem; margin: 1.25rem 0 0; padding: 0; }
.links svg { width: .65em; height: .65em; margin-left: .2em; fill: none; stroke: currentColor; stroke-width: 1.4; stroke-linecap: round; stroke-linejoin: round; }

/* 链接：陶土色文字加细下划线。 */
.links a, .body a {
  color: var(--clay);
  text-decoration: underline;
  text-decoration-color: color-mix(in srgb, var(--clay) 35%, transparent);
  text-decoration-thickness: 1px;
  text-underline-offset: .22em;
  transition: text-decoration-color .15s;
}
.links a:hover, .body a:hover { text-decoration-color: currentColor; }

/* 右上角：开场被吹走的那颗陶土色种子，揭开主页后飘落在这里；由 main.js 用笔刷画出并控制飘动。
   种子会从画框外飘进来，所以 svg 不裁切溢出。 */
.landing-seed {
  grid-area: art;
  justify-self: end;
  width: clamp(5rem, 11vw, 7.5rem);
  margin: 0 .75rem 0 0; padding: 0; border: 0;
  background: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
.landing-seed svg { display: block; width: 100%; height: auto; overflow: visible; }
.landing-seed .brush { fill: var(--clay); }
.landing-seed:focus-visible { outline: 1px dashed var(--clay); outline-offset: 6px; }

/* ---------- Content rows ---------- */
.content { padding-bottom: 4rem; }
.row {
  display: grid;
  grid-template-columns: 11rem minmax(0, var(--measure));
  gap: 2.5rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--line);
}
h2 {
  margin: 0;
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: .1em;
}
h2 .alt {
  display: block;
  font-style: italic;
  font-weight: 400;
  font-size: 1rem;
  letter-spacing: 0;
  color: var(--faint);
}
.body > :first-child { margin-top: 0; }
.body p { margin: 0 0 .75rem; text-wrap: pretty; }
.body p:last-child { margin-bottom: 0; }
.body ul { margin: 0 0 .75rem; padding-left: 1.1em; }
.body li::marker { color: var(--clay); }

.entry + .entry { margin-top: 1.75rem; }
h3 { margin: 0; font-size: 1.125rem; font-weight: 600; line-height: 1.6; }
.entry-en { font-style: italic; color: var(--muted); line-height: 1.5; margin-bottom: .5rem !important; }
.meta { color: var(--muted); }
.entry-links { display: flex; gap: 1.25rem; font-size: .9375rem; }

.pending { color: var(--faint); }
.pending::before { content: ""; display: inline-block; width: 1.25rem; height: 1px; margin-right: .75rem; vertical-align: middle; background: var(--line); }

/* ---------- Footer ---------- */
.site-footer {
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  padding-top: 1.75rem; padding-bottom: 2.5rem;
  border-top: 1px solid var(--line);
  font-size: .875rem; color: var(--faint);
}
.site-footer a { transition: color .15s; }
.site-footer a:hover { color: var(--ink); }

/* ---------- 入场动画（逐帧手绘 / 线条沸腾） ---------- */
/* <html> 带 intro 类时盖住整页。揭开分两步：先用 3 帧收掉画和字，再用 4 帧褪去纸面，
   避免开场的大字和主页内容叠在一起；飞走的种子继续飘过页面。 */
.intro-screen { display: none; }
html.intro { overflow: hidden; }
html.intro .intro-screen, .intro-screen.leaving {
  position: fixed; inset: 0; z-index: 20;
  display: grid; place-content: center; justify-items: center; gap: 1.25rem;
  background: var(--bg);
  cursor: pointer;
}
/* 纸面颗粒：现场生成的噪点，不额外请求图片。 */
.intro-screen::before {
  content: ""; position: absolute; inset: 0; pointer-events: none;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3CfeColorMatrix values='0 0 0 0 .08 0 0 0 0 .07 0 0 0 0 .05 0 0 0 .09 0'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
.intro-art { position: relative; width: min(52vh, 76vw); height: auto; overflow: visible; }
.intro-art .brush, .intro-line .brush, .intro-art .core { fill: var(--ink); }
.intro-art .seed { fill: none; stroke: var(--ink); stroke-width: 1.1; stroke-linecap: round; }
.intro-art .seed.clay { stroke: var(--clay); }
.intro-name { position: relative; margin: 0; text-align: center; opacity: 0; }
.intro-name span { display: block; font-size: clamp(2.25rem, 6vw, 3.25rem); font-weight: 600; line-height: 1.2; letter-spacing: .14em; }
.intro-name em { display: block; margin-top: .25rem; font-size: clamp(1.05rem, 2.4vw, 1.35rem); color: var(--muted); }
.intro-line { display: block; width: 100%; height: auto; overflow: visible; }
.intro-skip {
  position: absolute; right: 1.5rem; bottom: 1.25rem;
  padding: .25rem .5rem; border: 0; background: none;
  font: inherit; font-size: .875rem; letter-spacing: .1em; color: var(--faint);
  cursor: pointer;
}
.intro-skip:hover { color: var(--ink); }
.intro-screen.leaving { background-color: transparent; pointer-events: none; transition: background-color .33s steps(4) .25s; }
.intro-screen.leaving .ink, .intro-screen.leaving .intro-name,
.intro-screen.leaving .intro-skip, .intro-screen.leaving .stay { opacity: 0 !important; transition: opacity .25s steps(3); }
.intro-screen.leaving::before { opacity: 0; transition: opacity .33s steps(4) .25s; }
.intro-screen.skipped .seeds { opacity: 0; transition: opacity .25s; }

/* ---------- 英文页面 ---------- */
/* 大标题改用 Palatino 常规字重、收紧字距；副标题（.alt）换成中文，不用斜体。 */
html.i18n-pending body { visibility: hidden; }
html[lang="en"] h1 { font-weight: 400; font-size: clamp(2.6rem, 8vw, 5rem); letter-spacing: .01em; }
html[lang="en"] h2, html[lang="en"] nav a { letter-spacing: .02em; }
html[lang="en"] .alt { font-style: normal; letter-spacing: .08em; }
html[lang="en"] .intro-name span { font-weight: 400; letter-spacing: .03em; }
html[lang="en"] .intro-name em { letter-spacing: .2em; }

/* ---------- Responsive ---------- */
/* 窄屏：页头分两行，第一行是名字和中英切换，第二行是导航。 */
@media (max-width: 600px) {
  .header-inner { flex-wrap: wrap; row-gap: .75rem; }
  .site-name { margin-right: auto; }
  .lang-toggle { border-left: 0; padding-left: 0; }
  nav { order: 3; width: 100%; margin-left: 0; }
}
@media (max-width: 760px) {
  .wrap { padding-inline: 1.25rem; }
  .header-inner { padding-block: 1.25rem; }
  nav { gap: 1.1rem; }
  .hero { column-gap: 1.25rem; padding-top: 2.5rem; }
  .lede { margin-top: 1.75rem; }
  .row { grid-template-columns: 1fr; gap: .75rem; padding: 2.25rem 0; }
  h2 .alt { display: inline; margin-left: .6rem; }
}
@media (max-width: 380px) {
  h1 { font-size: 2.75rem; }
  html[lang="en"] h1 { font-size: 2.2rem; }
  nav { gap: .8rem; }
}

/* 系统要求减少动态效果时：不播放开场，种子静止显示（见 main.js）。 */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

@media print {
  .site-header, .skip-link, .links, .site-footer a, .intro-screen { display: none; }
  body { background: #fff; }
  .hero { padding-top: 0; }
  .row { break-inside: avoid; }
}