:root {
  color-scheme: light;
  --paper: #f7f6f2;
  --surface: #ffffff;
  --surface-strong: #ffffff;
  --ink: #161616;
  --muted: #686868;
  --line: #dedbd4;
  --accent: #7a684b;
  --accent-dark: #4d4131;
  --shadow: 0 22px 50px rgba(30, 30, 30, 0.08);
  --max-width: 1120px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

a {
  color: var(--accent-dark);
  text-decoration-thickness: 0.08em;
  text-underline-offset: 0.22em;
}

a:hover {
  color: var(--ink);
}

img {
  max-width: 100%;
  display: block;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: 1rem;
  z-index: 20;
  transform: translateY(-140%);
  padding: 0.75rem 1rem;
  background: var(--ink);
  color: white;
  border-radius: 6px;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(247, 246, 242, 0.94);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(18px);
}

.site-header[data-elevated="true"] {
  border-bottom-color: var(--line);
  box-shadow: 0 8px 24px rgba(51, 49, 43, 0.08);
}

.nav {
  width: min(var(--max-width), calc(100% - 32px));
  min-height: 70px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  color: var(--ink);
  font-weight: 800;
  text-decoration: none;
}

.brand-mark {
  display: inline-grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--line);
  color: var(--ink);
  background: var(--surface);
  font-size: 0.8rem;
  letter-spacing: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-links a,
.print-button {
  min-height: 40px;
  padding: 0.55rem 0.78rem;
  border: 0;
  border-radius: 6px;
  color: var(--ink);
  background: transparent;
  font: inherit;
  font-weight: 650;
  text-decoration: none;
  cursor: pointer;
}

.nav-links a:hover,
.print-button:hover {
  background: rgba(22, 22, 22, 0.06);
  color: var(--ink);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
}

.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;
}

.section-band {
  width: 100%;
}

.hero {
  min-height: calc(78svh - 70px);
  display: grid;
  align-items: center;
  padding: clamp(2.4rem, 5vw, 4.4rem) 0 clamp(2rem, 4vw, 3.2rem);
  background: var(--paper);
}

.hero-grid,
.content-section,
.site-footer {
  width: min(var(--max-width), calc(100% - 32px));
  margin: 0 auto;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 460px);
  gap: clamp(2.2rem, 5.5vw, 5rem);
  align-items: center;
}

.eyebrow {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}

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

h1 {
  margin-bottom: 1.1rem;
  font-size: clamp(3.1rem, 6.2vw, 5.9rem);
  line-height: 0.95;
  letter-spacing: 0;
  white-space: nowrap;
}

h1 span {
  display: inline-block;
}

h2 {
  margin-bottom: 0;
  font-size: clamp(2rem, 4vw, 3.3rem);
  line-height: 1.05;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 0.35rem;
  font-size: 1.08rem;
  line-height: 1.25;
  letter-spacing: 0;
}

.lede {
  max-width: 680px;
  color: #424242;
  font-size: clamp(1.25rem, 2vw, 1.55rem);
  line-height: 1.48;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1.25rem;
  margin-top: 1.7rem;
}

.hero-actions a,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 34px;
  color: var(--ink);
  font-weight: 760;
  text-decoration: underline;
  text-decoration-color: rgba(122, 104, 75, 0.45);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.35em;
}

.hero-actions a:hover,
.button:hover {
  color: var(--accent-dark);
  text-decoration-color: var(--accent-dark);
}

.button {
  padding: 0.68rem 1rem;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface-strong);
  text-decoration: none;
}

.button.primary {
  border-color: var(--accent-dark);
  color: white;
  background: var(--accent-dark);
}

.button.primary:hover {
  color: white;
  background: var(--ink);
}

.profile-panel {
  width: min(100%, 460px);
  justify-self: end;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--surface);
  box-shadow: var(--shadow);
}

.profile-panel::before {
  content: none;
}

.profile-visual {
  删掉 aspect-ratio: 1 / 1;
  删掉 overflow: hidden;
  border-radius: 4px;
  background: #e9e5dd;
}

.profile-visual img {
  width: 100%;
  height: 100%
  /* aspect-ratio: 1 / 1;   /* 把正方形限制移到图片本身 */ */
  object-fit: cover;
  display: block;
}

.content-section {
  padding: clamp(3.75rem, 7vw, 6.5rem) 0;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(160px, 0.35fr) minmax(0, 1fr);
  gap: 2rem;
  align-items: end;
  margin-bottom: clamp(1.8rem, 4vw, 3rem);
}

.project-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.project-card,
.experience-item {
  min-height: 100%;
  padding: 1.25rem;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.project-card {
  display: flex;
  flex-direction: column;
}

.project-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.project-card-header span {
  flex: 0 0 auto;
  padding: 0.24rem 0.52rem;
  border-radius: 999px;
  color: var(--accent-dark);
  background: rgba(122, 104, 75, 0.1);
  font-size: 0.74rem;
  font-weight: 800;
}

.project-card p,
.experience-item p,
.timeline-item p,
.publication-list li {
  color: var(--muted);
}

.project-card a {
  margin-top: auto;
  font-weight: 750;
}

.split-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.timeline {
  display: grid;
  gap: 1px;
  background: var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 2rem;
  padding: 1.4rem;
  background: rgba(255, 253, 248, 0.86);
}

.timeline-date,
.date {
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 850;
  text-transform: uppercase;
}

.degree {
  margin-bottom: 0.2rem;
  color: var(--ink) !important;
  font-weight: 720;
}

.publication-list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding-left: 1.2rem;
}

.publication-list li {
  padding-left: 0.35rem;
}

.publication-list strong {
  color: var(--ink);
}

.paper-link {
  color: var(--ink);
  font-weight: 700;
  text-decoration-color: rgba(122, 104, 75, 0.42);
}

.more-link-row {
  margin-top: 2rem;
}

.muted-section {
  width: 100%;
  max-width: none;
  padding-inline: max(16px, calc((100% - var(--max-width)) / 2));
  background: #f0eee8;
}

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

.role {
  margin-bottom: 0.2rem;
  color: var(--ink);
  font-weight: 750;
}

.interests-section {
  padding-bottom: clamp(3rem, 7vw, 5rem);
}

.experience-item h3 a {
  color: inherit;
  text-decoration-color: rgba(122, 104, 75, 0.35);
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
}

.tag-cloud span {
  padding: 0.55rem 0.78rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.72);
  color: #3c3c3c;
  font-weight: 700;
}

.service-note {
  max-width: 880px;
  margin: 1.6rem 0 0;
  color: var(--muted);
  font-size: 1rem;
}

.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  padding: 2rem 0 3rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
}

.site-footer div:first-child {
  display: grid;
  gap: 0.2rem;
}

.site-footer strong {
  color: var(--ink);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  font-weight: 750;
}

@media (max-width: 880px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    position: absolute;
    top: 70px;
    left: 16px;
    right: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.75rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--surface-strong);
    box-shadow: var(--shadow);
  }

  .nav-links[data-open="true"] {
    display: flex;
  }

  .nav-links a,
  .print-button {
    text-align: left;
  }

  .hero {
    min-height: 0;
  }

  .hero-grid,
  .section-heading,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .profile-panel {
    max-width: 440px;
  }

  .project-grid,
  .experience-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 560px) {
  .nav,
  .hero-grid,
  .content-section,
  .site-footer {
    width: min(var(--max-width), calc(100% - 24px));
  }

  .hero {
    padding-top: 1.6rem;
  }

  h1 {
    font-size: clamp(2.25rem, 13vw, 3.1rem);
  }

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

  .button {
    width: 100%;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media print {
  body {
    background: white;
  }

  .site-header,
  .hero-actions,
  .more-link-row,
  .site-footer {
    display: none;
  }

  .hero,
  .content-section,
  .muted-section {
    padding: 1rem 0;
    background: white;
  }

  .hero {
    min-height: 0;
  }

  .hero-grid,
  .section-heading,
  .project-grid,
  .experience-grid,
  .timeline-item {
    grid-template-columns: 1fr;
  }

  .profile-panel,
  .project-card,
  .experience-item {
    box-shadow: none;
    break-inside: avoid;
  }

  a {
    color: black;
    text-decoration: none;
  }
}

.hero-actions {
  display: flex;
  flex-direction: column;
  align-items: center;      /* 居中对齐，若需左对齐改为 flex-start */
  gap: 0.6rem;              /* 两行之间的间距 */
}

.contact-email a {
  font-size: 1.05rem;
  /* 如需让邮箱更醒目，可取消下面注释 */
  /* font-weight: 500; */
}

.social-links {
  display: flex;
  gap: 1.2rem;              /* GitHub 和 Google Scholar 之间的间距 */
}