:root {
  --bg: #e7e1d6;
  --bg-raise: #f4f0e8;
  --ink: #1b1916;
  --ink-soft: #3c3832;
  --muted: #5e574e;
  --line: rgba(27, 25, 22, 0.14);
  --accent: #8f3d2b;
  --serif: "Instrument Serif", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --serif-cn: "Iowan Old Style", "Palatino Linotype", "Songti SC", "STSong", "SimSun", serif;
  --sans: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --wrap: 1080px;
  --nav-h: 4.25rem;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("../fonts/InstrumentSerif-Regular.woff2") format("woff2");
  font-weight: 400;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Instrument Serif";
  src: url("../fonts/InstrumentSerif-Italic.woff2") format("woff2");
  font-weight: 400;
  font-style: italic;
  font-display: swap;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(900px 480px at 110% -10%, rgba(143, 61, 43, 0.09), transparent 58%),
    radial-gradient(640px 420px at -12% 18%, rgba(27, 25, 22, 0.05), transparent 60%),
    var(--bg);
  font-family: var(--sans);
  font-size: 1.0625rem;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
p {
  margin: 0;
}

ul {
  margin: 0;
  padding: 0;
}

a {
  color: inherit;
  text-underline-offset: 0.18em;
}

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

.skip {
  position: absolute;
  left: 1rem;
  top: -4rem;
  z-index: 20;
  padding: 0.5rem 0.8rem;
  background: var(--ink);
  color: var(--bg);
}

.skip:focus {
  top: 0.75rem;
}

.wrap {
  width: min(var(--wrap), calc(100% - 2.5rem));
  margin-inline: auto;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  min-height: var(--nav-h);
  padding: 0.75rem max(1.25rem, calc((100% - var(--wrap)) / 2));
  background: rgba(231, 225, 214, 0.84);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
}

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

.brand {
  font-family: var(--serif-cn);
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  gap: 1.15rem;
  margin-left: auto;
  overflow-x: auto;
  scrollbar-width: none;
}

.nav-tools {
  display: flex;
  align-items: center;
  gap: 0.45rem;
  flex: none;
}

.lang-switch {
  display: flex;
  border: 1px solid var(--line);
  background: var(--bg-raise);
}

.lang-switch button,
.pdf-btn {
  border: 0;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.82rem;
  line-height: 1.2;
  padding: 0.38rem 0.62rem;
  cursor: pointer;
}

.lang-switch button.is-active {
  background: var(--ink);
  color: var(--bg);
}

.pdf-btn {
  border: 1px solid var(--line);
  background: var(--bg-raise);
  color: var(--ink);
}

.pdf-btn:hover,
.lang-switch button:hover {
  color: var(--accent);
}

.lang-switch button.is-active:hover {
  color: var(--bg);
}

.pdf-btn:disabled {
  cursor: progress;
  opacity: 0.7;
}

.nav-links::-webkit-scrollbar {
  display: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 0.92rem;
  text-decoration: none;
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a.is-active {
  color: var(--ink);
}

.nav-links a.is-active {
  box-shadow: inset 0 -1px 0 var(--accent);
}

.hero {
  display: flex;
  flex-direction: column;
}

.hero,
.section {
  scroll-margin-top: calc(var(--nav-h) + 0.75rem);
}

.hero-main {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 1.4rem 0 1.15rem;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 500;
  letter-spacing: 0.14em;
}

h1 {
  font-family: var(--serif-cn);
  font-size: clamp(4.4rem, 13vw, 8.6rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 0.92;
}

html[lang="en"] h1,
html[lang="en"] .brand,
html[lang="en"] .lede,
html[lang="en"] .contact-lead,
html[lang="en"] h2,
html[lang="en"] h3 {
  font-family: var(--serif);
  font-weight: 400;
}

html[lang="en"] body {
  opacity: 0;
}

html[lang="en"].ready body {
  opacity: 1;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(16rem, 0.8fr);
  gap: 2.5rem 4rem;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--line);
}

.lede {
  max-width: 38rem;
  color: var(--ink-soft);
  font-family: var(--serif-cn);
  font-size: 1.35rem;
  font-weight: 500;
  line-height: 1.65;
}

.facts {
  margin: 0;
  display: grid;
  gap: 0.9rem;
}

.facts div,
.project-facts div {
  display: grid;
  gap: 0.15rem;
}

.facts dt,
.project-facts dt,
.skills dt,
.contact-list span,
.aside-label,
.interest-kicker {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 500;
  letter-spacing: 0.12em;
}

.facts dd,
.project-facts dd {
  margin: 0;
}

.hero-side {
  display: grid;
  align-content: start;
  gap: 1rem;
}

.portrait {
  width: min(100%, 13.5rem);
  aspect-ratio: 4 / 5;
  object-fit: cover;
  object-position: center 12%;
  display: block;
  border: 1px solid var(--line);
  justify-self: end;
}

.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
  margin: 0 auto;
  padding: 1.25rem 0 1.6rem;
  list-style: none;
  border-top: 1px solid var(--line);
}

.stats strong {
  display: block;
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 400;
  letter-spacing: -0.03em;
  line-height: 1;
}

.stats span {
  display: block;
  margin-top: 0.4rem;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.45;
}

.section {
  padding: 3.6rem 0 0.25rem;
}

.section-head {
  display: flex;
  align-items: baseline;
  gap: 0.8rem;
  margin-bottom: 1.6rem;
  padding-bottom: 0.8rem;
  border-bottom: 1px solid var(--line);
}

.index {
  margin: 0;
  color: var(--accent);
  font-family: var(--serif);
  font-size: 1.15rem;
  font-style: italic;
}

h2 {
  font-family: var(--serif-cn);
  font-size: 2rem;
  font-weight: 600;
  letter-spacing: -0.03em;
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(18rem, 0.9fr);
  gap: 2.2rem 3.5rem;
  align-items: start;
}

.prose {
  display: grid;
  gap: 1.15rem;
  max-width: 40rem;
  color: var(--ink-soft);
  font-size: 1.08rem;
  line-height: 1.9;
}

.principles {
  display: grid;
  align-content: start;
  gap: 1.15rem;
  margin-top: 0.35rem;
  padding: 0.15rem 0 0.15rem 1.15rem;
  border-left: 1px solid var(--line);
}

.principles h3,
.role-body h3,
.project h3,
.schools h3,
.interest h3 {
  font-family: var(--serif-cn);
  font-size: 1.2rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.4;
}

.principles p:last-child {
  margin-top: 0.3rem;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.timeline {
  display: grid;
}

.role {
  display: grid;
  grid-template-columns: 11.5rem minmax(0, 1fr);
  gap: 1.5rem 2rem;
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--line);
}

.role:first-child {
  padding-top: 0.2rem;
}

.role-when,
.role-where,
.role-org {
  margin: 0;
}

.role-when {
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.role-where,
.role-org {
  color: var(--muted);
}

.role-org {
  margin-bottom: 0.2rem;
  font-size: 0.95rem;
}

.role-body ul,
.project-main ul {
  margin-top: 0.85rem;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0.45rem;
  color: var(--ink-soft);
}

.role-body li,
.project-main li {
  padding-left: 0.9rem;
  position: relative;
}

.role-body li::before,
.project-main li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 0.35rem;
  height: 1px;
  background: var(--accent);
}

.project {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(14rem, 0.55fr);
  gap: 2rem 3rem;
  padding: 1.4rem 1.4rem 1.2rem;
  background: var(--bg-raise);
  border: 1px solid var(--line);
}

.project-main p {
  margin-top: 0.8rem;
  max-width: 40rem;
  color: var(--ink-soft);
}

.project-main li {
  color: var(--ink-soft);
}

.project-facts {
  margin: 0;
  display: grid;
  align-content: end;
  gap: 1rem;
}

.project-facts dd {
  margin: 0.15rem 0 0;
}

.schools {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.schools article {
  padding: 1.3rem 1.3rem 1.15rem;
  background: var(--bg-raise);
  border: 1px solid var(--line);
}

.schools article > p:not(.role-when) {
  margin-top: 0.7rem;
  color: var(--ink-soft);
}

.project + .interests {
  margin-top: 0.9rem;
}

.diploma-link {
  display: block;
  margin-top: 0.9rem;
}

.diploma-link img {
  display: block;
  width: 100%;
  max-height: 18rem;
  object-fit: contain;
  object-position: top center;
  background: #fff;
  border: 1px solid var(--line);
}

.project-link {
  margin-top: 0.9rem;
}

.project-link a,
.github-line a,
.repo-card:hover strong {
  color: var(--accent);
}

.github-line {
  margin: 0 0 1rem;
  color: var(--muted);
}

.repo-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.9rem;
  margin-top: 0.9rem;
}

.repo-card {
  display: block;
  padding: 1.05rem 1.1rem 1.15rem;
  text-decoration: none;
  background: var(--bg-raise);
  border: 1px solid var(--line);
}

.repo-card strong {
  display: block;
  margin: 0.3rem 0 0.4rem;
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 400;
  letter-spacing: -0.02em;
}

.repo-card span:last-child {
  color: var(--ink-soft);
}

.wechat-id {
  font-size: 1.15rem;
}

.skills {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  margin: 0;
}

.skills div {
  padding: 1rem 1rem 1rem 0;
  border-top: 1px solid var(--line);
}

.skills dd {
  margin: 0.25rem 0 0;
  font-size: 1.08rem;
}

.section-note {
  max-width: 40rem;
  margin-bottom: 1.25rem;
  color: var(--muted);
}

.interests {
  display: grid;
  grid-template-columns: minmax(12rem, 0.7fr) minmax(0, 1.3fr);
  gap: 0.9rem;
  align-items: start;
}

.interest {
  padding: 1.15rem 1.15rem 1.25rem;
  background: var(--bg-raise);
  border: 1px solid var(--line);
}

.interest p:empty {
  display: none;
}

.game-card {
  display: grid;
  grid-template-columns: 4.5rem minmax(0, 1fr);
  gap: 0.85rem;
  align-items: center;
  margin-top: 1rem;
  padding: 0.75rem;
  text-decoration: none;
  background: var(--bg);
  border: 1px solid var(--line);
}

.game-card img {
  width: 4.5rem;
  height: 4.5rem;
  display: block;
}

.game-card span {
  display: block;
}

.game-kicker,
.game-url {
  color: var(--muted);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
}

.game-title {
  display: block;
  margin: 0.15rem 0 0.2rem;
  font-family: var(--serif-cn);
  font-size: 1.2rem;
}

.game-tagline {
  color: var(--ink-soft);
  line-height: 1.45;
}

.game-url {
  margin-top: 0.25rem;
  color: var(--accent);
  letter-spacing: 0.01em;
}

.game-card:hover {
  border-color: var(--accent);
}

.interest h3 {
  margin: 0.45rem 0 0.55rem;
}

.interest p:last-child {
  color: var(--ink-soft);
}

.contact {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1fr);
  gap: 2rem 3rem;
  align-items: start;
}

.contact-lead {
  font-family: var(--serif-cn);
  font-size: clamp(1.6rem, 3vw, 2.15rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  line-height: 1.35;
}

.contact-list {
  list-style: none;
  display: grid;
  gap: 0.85rem;
}

.contact-list li {
  display: grid;
  gap: 0.1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line);
}

.contact-list a {
  width: fit-content;
  font-size: 1.15rem;
  text-decoration-color: rgba(143, 61, 43, 0.45);
}

.contact-list a:hover {
  color: var(--accent);
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 4.5rem;
  padding: 1.2rem 0 1.6rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.92rem;
}

@media (max-width: 860px) {
  .hero-grid,
  .about-layout,
  .project,
  .contact,
  .schools,
  .skills,
  .stats,
  .interests,
  .repo-grid {
    grid-template-columns: 1fr;
  }

  .role {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .stats {
    gap: 1.1rem 0;
  }

  .stats li + li {
    padding-top: 0.9rem;
    border-top: 1px solid var(--line);
  }

  .project-facts {
    align-content: start;
  }

  h1 {
    font-size: clamp(3.6rem, 18vw, 5.5rem);
  }

  .section {
    padding-top: 2.75rem;
  }
}

@media (max-width: 640px) {
  .wrap {
    width: min(var(--wrap), calc(100% - 1.6rem));
  }

  .nav {
    flex-wrap: wrap;
    gap: 0.35rem 1rem;
    padding-top: 0.7rem;
    padding-bottom: 0.7rem;
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 0.35rem 0.9rem;
    overflow: visible;
  }

  .lede {
    font-size: 1.15rem;
  }

  .portrait {
    justify-self: start;
  }

  .footer {
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

@media print {
  .nav,
  .skip,
  .pdf-btn,
  .lang-switch {
    display: none;
  }

  body,
  html[lang="en"] body {
    background: white;
    opacity: 1;
  }

  .hero {
    min-height: 0;
  }

  a[href^="http"]::after,
  a[href^="mailto:"]::after {
    content: " (" attr(href) ")";
    font-size: 0.85em;
  }
}