:root {
  color-scheme: light;
  --bg: #f8f8f6;
  --surface: #ffffff;
  --surface-soft: #f4f6f8;
  --text: #162235;
  --text-soft: #59687a;
  --line: #d9e1e8;
  --line-soft: rgba(15, 61, 117, 0.08);
  --accent: #0f3d75;
  --accent-soft: #e8eff8;
  --shadow: 0 16px 40px rgba(11, 28, 52, 0.08);
  --radius-lg: 24px;
  --radius-md: 18px;
  --radius-sm: 12px;
  --container: 1100px;
  --nav-height: 78px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 18px);
}

body {
  margin: 0;
  font-family: "Manrope", sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 15px;
}

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

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.container {
  width: min(calc(100% - 2rem), 1320px);
  margin: 0 auto;
}

.page-shell {
  display: block;
  padding-top: 2.5rem;
}

.page-content {
  max-width: 840px;
  margin: 0 auto;
  min-width: 0;
}

.page-content .container {
  width: 100%;
  margin: 0;
}

.section {
  padding: 2rem 0;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(14px);
  background: rgba(248, 248, 246, 0.9);
  border-bottom: 1px solid var(--line-soft);
}

.nav-shell {
  min-height: var(--nav-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 2.5rem;
  height: 2.5rem;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: var(--accent);
  color: #fff;
  font-size: 0.9rem;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 0.25rem;
}

.site-nav a {
  color: var(--text-soft);
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  font-size: 0.94rem;
  transition: color 160ms ease, background-color 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible,
.site-nav a.is-active {
  color: var(--accent);
  background: rgba(15, 61, 117, 0.08);
}

.nav-toggle {
  display: none;
  width: 2.75rem;
  height: 2.75rem;
  border: 0;
  padding: 0;
  border-radius: 50%;
  background: var(--surface);
  box-shadow: 0 8px 20px rgba(15, 61, 117, 0.08);
}

.nav-toggle span {
  display: block;
  width: 1.2rem;
  height: 2px;
  margin: 0.25rem auto;
  border-radius: 999px;
  background: var(--text);
}

.hero {
  padding-top: 0;
}

.eyebrow,
.section-kicker {
  margin: 0 0 0.8rem;
  color: var(--accent);
  font-size: 0.9rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.hero h1,
.section-heading h2,
.paper-content h3,
.experience-content h3 {
  font-family: "Crimson Text", serif;
  letter-spacing: -0.02em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.4rem, 4.6vw, 4rem);
  line-height: 1;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.9rem;
  padding: 0.7rem 1.05rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--surface);
  color: var(--text);
  font-weight: 700;
  transition: transform 160ms ease, border-color 160ms ease, color 160ms ease,
    background-color 160ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
  border-color: var(--accent);
  color: var(--accent);
}

.button-primary {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

.button-primary:hover,
.button-primary:focus-visible {
  color: #fff;
  background: #0c3564;
}

.news-panel,
.contact-card {
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
}

.intro-sidebar {
  position: fixed;
  top: 2rem;
  left: max(1rem, calc(50vw - 700px));
  width: 180px;
}

.intro-avatar {
  width: 150px;
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  border: 5px solid var(--surface);
  box-shadow: 0 0 0 1px var(--line-soft);
  background: var(--surface);
}

.intro-name {
  margin: 1rem 0 0;
  font-size: 1.48rem;
  line-height: 1.05;
  font-family: "Manrope", sans-serif;
  letter-spacing: -0.03em;
}

.intro-role,
.intro-affiliation,
.intro-location {
  margin: 0.6rem 0 0;
  color: var(--text-soft);
  font-size: 0.84rem;
  line-height: 1.45;
}

.intro-affiliation {
  margin-top: 0.28rem;
}

.intro-stats {
  margin: 0.75rem 0 0;
  padding: 0.6rem 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  display: grid;
  gap: 0.85rem;
}

.intro-stats div {
  display: grid;
  gap: 0.2rem;
}

.intro-stats dt {
  color: var(--text-soft);
  font-size: 0.74rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.intro-stats dd {
  margin: 0;
  font-weight: 700;
  font-size: 0.94rem;
}

.intro-side-links {
  display: grid;
  gap: 0.55rem;
  margin-top: 0.7rem;
}

.intro-side-links a,
.intro-links a {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.96rem;
}

.icon {
  width: 1.3rem;
  min-width: 1.3rem;
  height: 1.3rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text);
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1;
}

.icon svg {
  width: 1.15rem;
  height: 1.15rem;
  display: block;
}

.icon-zhihu {
  border-radius: 0;
  width: 1.45rem;
  min-width: 1.45rem;
  height: 1.1rem;
}

.intro-main h1 {
  margin-bottom: 1rem;
}

.intro-lead,
.intro-paragraph {
  max-width: 52rem;
  color: var(--text-soft);
  font-family: "Times New Roman", Times, serif;
}

.intro-lead a,
.intro-paragraph a {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 0.1em;
}

.intro-lead a:hover,
.intro-lead a:focus-visible,
.intro-paragraph a:hover,
.intro-paragraph a:focus-visible {
  color: #0c3564;
}

.intro-lead {
  margin: 0 0 0.65rem;
  font-size: 1.04rem;
  line-height: 1.62;
  color: var(--text);
}

.intro-paragraph {
  margin: 0 0 0.65rem;
  font-size: 0.98rem;
  line-height: 1.68;
}

.interest-block {
  margin-top: 0.85rem;
}

.interest-title {
  margin: 0 0 0.7rem;
  color: var(--text);
  font-weight: 800;
  font-size: 0.98rem;
  font-family: "Times New Roman", Times, serif;
}

.interest-list {
  margin: 0;
  padding-left: 1.4rem;
  color: var(--text);
  font-family: "Times New Roman", Times, serif;
}

.interest-list li {
  margin-bottom: 0.35rem;
  font-weight: 600;
  font-size: 0.97rem;
}

.intro-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.4rem;
  margin-top: 1rem;
  padding-top: 0.75rem;
  border-top: 1px solid var(--line-soft);
}

.compact-heading {
  align-items: start;
  margin-bottom: 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.8rem;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(1.2rem, 2.1vw, 1.55rem);
  line-height: 1.08;
}

.prose {
  max-width: 74ch;
  color: var(--text-soft);
  font-size: 0.96rem;
  font-family: "Times New Roman", Times, serif;
}

.prose p {
  margin: 0 0 1rem;
}

.news-panel {
  padding: 0.2rem 0;
}

.news-list {
  display: grid;
  gap: 0.2rem;
  max-height: 290px;
  overflow-y: auto;
}

.news-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 1.2rem;
  align-items: start;
  padding: 0.95rem 1.2rem;
}

.news-item + .news-item {
  border-top: 1px solid var(--line-soft);
}

.news-item time {
  color: var(--accent);
  font-weight: 800;
  font-size: 0.95rem;
}

.news-item p,
.paper-summary,
.experience-desc {
  margin: 0;
  color: var(--text-soft);
  font-family: "Times New Roman", Times, serif;
}

.paper-list {
  display: grid;
  gap: 0.7rem;
}

.paper-item {
  display: grid;
  gap: 0.9rem;
  padding: 0.85rem;
  background: var(--surface);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.paper-item:hover,
.paper-item:focus-within {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: rgba(15, 61, 117, 0.18);
}

.paper-body {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 1.5rem;
  align-items: start;
}

.paper-thumb {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: contain;
  border-radius: 14px;
  border: 1px solid var(--line-soft);
  background: #fff;
  cursor: zoom-in;
}

.paper-content {
  min-width: 0;
}

.paper-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.45rem;
}

.paper-meta-line {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  padding: 0.35rem 0.7rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 0.84rem;
  font-weight: 800;
}

.badge-secondary {
  background: rgba(15, 61, 117, 0.06);
  color: var(--text);
}

.paper-year {
  color: var(--text-soft);
  font-size: 0.92rem;
  font-weight: 700;
}

.paper-content h3 {
  margin: 0 0 0.5rem;
  font-size: 1.36rem;
  line-height: 1.18;
}

.paper-corner-badge {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  flex-shrink: 0;
}

.paper-corner-badge img {
  display: block;
}

.paper-summary-secondary {
  margin-top: 0.35rem;
}

.link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 0.2rem;
  font-size: 0.95rem;
}

.link-row a,
.contact-links a {
  color: var(--accent);
  font-weight: 700;
  position: relative;
}

.link-row a::after,
.contact-links a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.1rem;
  width: 100%;
  height: 1px;
  background: currentColor;
  transform: scaleX(0.2);
  transform-origin: left center;
  opacity: 0;
  transition: opacity 160ms ease, transform 160ms ease;
}

.link-row a:hover::after,
.link-row a:focus-visible::after,
.contact-links a:hover::after,
.contact-links a:focus-visible::after {
  opacity: 1;
  transform: scaleX(1);
}

.repo-badge {
  flex-shrink: 0;
}

.repo-badge img {
  display: block;
  height: 20px;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: rgba(10, 16, 24, 0.82);
}

.lightbox.is-open {
  display: flex;
}

.lightbox-image {
  max-width: min(1200px, 92vw);
  max-height: 88vh;
  width: auto;
  height: auto;
  border-radius: 16px;
  background: #fff;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.32);
}

.lightbox-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 3rem;
  height: 3rem;
  border: 0;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
}

.experience-list {
  display: grid;
  gap: 1rem;
}

.experience-entry {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 1.8rem;
  align-items: start;
}

.experience-logo {
  width: 100%;
  max-width: 120px;
  max-height: 72px;
  object-fit: contain;
}

.experience-logo-round {
  max-width: 88px;
  max-height: 88px;
  border-radius: 50%;
  object-fit: cover;
  box-shadow: 0 0 0 1px var(--line-soft);
}

.experience-content h3 {
  margin: 0;
  font-size: 1.34rem;
  line-height: 1.18;
}

.experience-date {
  margin: 0.45rem 0 0.5rem;
  color: #7b8795;
  font-style: italic;
  font-size: 0.9rem;
  font-family: "Times New Roman", Times, serif;
}

.experience-role {
  margin: 0 0 0.4rem;
  font-weight: 800;
  color: var(--text);
  font-size: 0.98rem;
  font-family: "Times New Roman", Times, serif;
}

.experience-desc {
  margin: 0;
  color: var(--text-soft);
  font-size: 0.95rem;
}

.competition-list {
  display: grid;
  gap: 0.9rem;
}

.competition-entry {
  border-top: 2px solid var(--text);
  padding-top: 0.7rem;
}

.competition-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1.5rem;
}

.competition-head h3 {
  margin: 0;
  font-size: 1.22rem;
  line-height: 1.3;
  font-weight: 800;
}

.competition-highlight {
  font-weight: 800;
}

.competition-meta {
  flex-shrink: 0;
  text-align: right;
  color: var(--text);
  font-size: 0.95rem;
  line-height: 1.5;
}

.competition-meta p,
.competition-role,
.competition-desc {
  margin: 0;
}

.competition-role {
  margin-top: 0.15rem;
  font-weight: 700;
  color: var(--text);
  font-size: 0.98rem;
}

.competition-desc {
  margin-top: 0.3rem;
  color: var(--text);
  font-size: 0.98rem;
  line-height: 1.65;
}

.awards-list {
  margin: 0;
  padding-left: 1.5rem;
}

.awards-list li {
  margin-bottom: 0.45rem;
  font-size: 1rem;
  color: var(--text);
  font-family: "Times New Roman", Times, serif;
}

.site-footer {
  padding: 1.4rem 0 2rem;
}

.footer-shell {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line-soft);
  color: var(--text-soft);
  font-size: 0.95rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0d131c;
    --surface: #131d2a;
    --surface-soft: #162231;
    --text: #eff4fb;
    --text-soft: #b8c5d4;
    --line: #304154;
    --line-soft: rgba(160, 188, 220, 0.12);
    --accent: #7eb2f1;
    --accent-soft: rgba(126, 178, 241, 0.12);
    --shadow: 0 20px 46px rgba(0, 0, 0, 0.28);
  }

  .site-header {
    background: rgba(13, 19, 28, 0.88);
  }

  .button-primary {
    color: #07111d;
  }

  .news-panel,
  .paper-item {
    box-shadow: none;
  }
}

@media (max-width: 1200px) {
  .intro-sidebar {
    position: static;
    width: auto;
  }
}

@media (max-width: 980px) {
  .page-shell,
  .experience-entry {
    grid-template-columns: 1fr;
  }

  .hero {
    padding-top: 3.5rem;
  }

  .paper-item {
    gap: 0.75rem;
  }

  .paper-body {
    grid-template-columns: 1fr;
    gap: 0.9rem;
  }

  .paper-thumb {
    max-width: 320px;
  }

  .paper-head {
    flex-direction: column;
    gap: 0.45rem;
  }

  .experience-logo,
  .experience-logo-round {
    max-width: 92px;
  }

  .competition-head {
    flex-direction: column;
    gap: 0.3rem;
  }

  .competition-meta {
    text-align: left;
  }
}

@media (max-width: 840px) {
  .nav-toggle {
    display: inline-block;
  }

  .site-nav {
    position: absolute;
    top: calc(100% + 0.6rem);
    right: 1rem;
    left: 1rem;
    display: none;
    flex-direction: column;
    gap: 0.2rem;
    padding: 0.6rem;
    background: rgba(255, 255, 255, 0.97);
    border: 1px solid var(--line-soft);
    border-radius: 20px;
    box-shadow: var(--shadow);
  }

  .site-nav.is-open {
    display: flex;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 2rem 0;
  }

  .container {
    width: min(calc(100% - 1.2rem), var(--container));
  }

  .page-shell {
    padding-top: 1.6rem;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 0.25rem;
  }

  .footer-shell,
  .section-heading {
    align-items: start;
    flex-direction: column;
  }
}