:root {
  --ink: #142946;
  --muted: #50647c;
  --blue: #275ed7;
  --blue-dark: #1545b4;
  --line: #cad6e8;
  --paper: #f7f9fc;
  --white: #ffffff;
  --pale: #e9f0ff;
  --sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  --serif: "Songti SC", "Noto Serif CJK SC", "STSong", serif;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
body, button, a { -webkit-tap-highlight-color: transparent; }
a { color: inherit; text-decoration: none; }
a:focus-visible { outline: 3px solid var(--blue); outline-offset: 5px; border-radius: 2px; }
::selection { color: var(--ink); background: #b9ceff; }
.shell { width: min(1180px, calc(100% - 88px)); margin-inline: auto; }
.skip-link { position: absolute; z-index: 100; top: -100px; left: 16px; padding: 12px 16px; background: var(--white); color: var(--ink); }
.skip-link:focus { top: 12px; }

.site-header { position: relative; z-index: 5; border-bottom: 1px solid var(--line); background: rgba(247,249,252,.92); }
.header-inner { height: 78px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.wordmark { font-family: var(--serif); font-size: 26px; font-weight: 700; white-space: nowrap; }
.wordmark-mark { color: var(--blue); }
nav { display: flex; align-items: center; gap: clamp(20px, 3.1vw, 45px); }
nav a { font-size: 14px; font-weight: 600; color: var(--muted); }
nav a:hover, .site-footer a:hover { color: var(--blue); }

.hero { min-height: 650px; display: grid; grid-template-columns: minmax(0, 1.14fr) minmax(350px, .86fr); align-items: center; gap: 52px; padding-block: 72px 88px; }
.hero-copy { position: relative; z-index: 2; }
.hero-meta { margin: 0 0 24px; color: var(--blue); font-size: 14px; font-weight: 700; letter-spacing: .08em; }
h1, h2, h3, p { margin-top: 0; }
h1 { margin-bottom: 15px; font-family: var(--serif); font-size: clamp(94px, 11vw, 164px); font-weight: 700; line-height: 1.12; letter-spacing: -.07em; }
.hero-period { color: var(--blue); }
.hero-lead { max-width: 650px; margin-bottom: 23px; font-family: var(--serif); font-size: clamp(29px, 3vw, 44px); line-height: 1.43; letter-spacing: -.025em; }
.hero-description { max-width: 570px; margin-bottom: 30px; color: var(--muted); font-size: 16px; line-height: 1.95; }
.text-link { display: inline-flex; align-items: center; gap: 14px; padding-bottom: 8px; border-bottom: 2px solid var(--blue); color: var(--blue-dark); font-size: 15px; font-weight: 700; }
.text-link:hover { gap: 20px; }
.hero-art { position: relative; aspect-ratio: 1; width: 100%; max-width: 470px; justify-self: end; border-radius: 50%; background: radial-gradient(circle at 48% 46%, #fafcff 0 17%, #e5eeff 17.4% 37%, #d1e0fd 37.4% 38%, #eaf1fe 38.4% 59%, #d6e4fc 59.4% 60%, transparent 60.4%), radial-gradient(circle, #e2ebfa, #f7f9fc 69%); }
.orbit { position: absolute; inset: 9%; border: 1px solid rgba(39,94,215,.25); border-radius: 50%; }
.orbit-two { inset: 22%; border-style: dashed; opacity: .8; }
.orbit-three { inset: 36%; border-color: rgba(39,94,215,.38); }
.art-node { position: absolute; z-index: 2; width: 13px; height: 13px; border: 3px solid var(--paper); border-radius: 50%; background: var(--blue); box-shadow: 0 0 0 1px var(--blue); }
.node-one { left: 16%; top: 27%; }.node-two { right: 13%; top: 43%; }.node-three { left: 46%; bottom: 13%; }
.art-label { position: absolute; z-index: 2; padding: 10px 17px; border: 1px solid var(--line); border-radius: 4px; background: var(--white); color: var(--ink); font-family: var(--serif); font-size: 20px; box-shadow: 0 8px 24px rgba(20,41,70,.06); }
.label-one { left: 4%; top: 17%; }.label-two { right: 1%; top: 32%; }.label-three { left: 40%; bottom: 1%; }

.section { scroll-margin-top: 32px; padding-block: 112px; }
.section-research { background: var(--white); }
.section-intro { max-width: 760px; margin-bottom: 54px; }
.section-kicker { margin-bottom: 19px; color: var(--blue); font-family: Georgia, serif; font-size: 16px; font-style: italic; }
h2 { margin-bottom: 20px; font-family: var(--serif); font-size: clamp(34px, 4vw, 55px); font-weight: 700; line-height: 1.33; letter-spacing: -.035em; }
.section-intro > p:last-child { max-width: 620px; margin-bottom: 0; color: var(--muted); font-size: 16px; line-height: 1.9; }
.research-list { border-top: 1px solid var(--line); }
.research-item { display: grid; grid-template-columns: 190px minmax(0, 1fr); gap: 40px; padding-block: 38px 42px; border-bottom: 1px solid var(--line); }
.research-side { display: flex; flex-direction: column; align-items: flex-start; gap: 13px; padding-top: 5px; }
.research-type { padding: 6px 10px; border: 1px solid #bdd0f2; border-radius: 3px; color: var(--blue-dark); font-size: 12px; font-weight: 700; }
.research-year { color: var(--muted); font-size: 13px; }
.research-main { max-width: 760px; }
.research-main h3 { margin-bottom: 13px; font-family: var(--serif); font-size: clamp(22px, 2.3vw, 30px); line-height: 1.45; }
.research-main p { margin-bottom: 14px; color: var(--muted); font-size: 15px; line-height: 1.85; }
.research-main .research-subtitle { color: var(--blue-dark); font-family: Georgia, serif; font-size: 14px; line-height: 1.5; }
.research-main .research-note { margin-bottom: 0; color: var(--blue-dark); font-size: 13px; font-weight: 700; }
.section-footnote { margin: 22px 0 0; color: #64748a; font-size: 12px; }

.section-experience { background: #eaf0f9; }
.experience-grid { display: grid; grid-template-columns: minmax(250px, .82fr) minmax(0, 1.18fr); gap: 9%; }
.experience-intro { position: sticky; top: 50px; height: max-content; }
.timeline { border-top: 1px solid #b9cbe5; }
.timeline-item { display: grid; grid-template-columns: 150px minmax(0, 1fr); gap: 22px; padding-block: 26px 29px; border-bottom: 1px solid #b9cbe5; }
.timeline-date { padding-top: 4px; color: var(--blue-dark); font-size: 12px; font-weight: 700; white-space: nowrap; }
.timeline h3 { margin-bottom: 4px; font-family: var(--serif); font-size: 23px; }
.timeline-role { margin-bottom: 11px; color: var(--blue-dark); font-size: 13px; font-weight: 700; }
.timeline-item p:last-child { margin-bottom: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

.section-about { background: var(--paper); }
.about-grid { display: grid; grid-template-columns: minmax(250px, .82fr) minmax(0, 1.18fr); gap: 9%; }
.about-content { display: grid; gap: 33px; }
.about-block { padding-bottom: 28px; border-bottom: 1px solid var(--line); }
.about-block h3 { margin-bottom: 14px; color: var(--blue-dark); font-size: 14px; }
.about-block p { max-width: 600px; margin-bottom: 5px; color: var(--muted); font-size: 15px; line-height: 1.85; }
.about-block .about-strong { color: var(--ink); font-family: var(--serif); font-size: 23px; font-weight: 700; }

.contact { scroll-margin-top: 32px; padding-block: 100px 105px; background: var(--ink); color: var(--white); }
.contact .section-kicker { color: #a9c5ff; }
.contact h2 { max-width: 800px; margin-bottom: 15px; }
.contact-inner > p:not(.section-kicker) { margin-bottom: 35px; color: #c3d1e4; font-size: 16px; line-height: 1.8; }
.contact-links { display: flex; flex-wrap: wrap; gap: 16px; }
.contact-link { display: inline-flex; align-items: center; justify-content: space-between; gap: 45px; min-width: 170px; padding: 14px 19px; border: 1px solid #8ba8ce; border-radius: 3px; font-size: 15px; font-weight: 700; }
.contact-link:hover { background: #244263; }
.site-footer { background: #10233d; color: #b9c9de; }
.footer-inner { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 20px; font-size: 12px; }

@media (max-width: 900px) {
  .hero { grid-template-columns: minmax(0, 1fr) minmax(250px, .7fr); gap: 20px; min-height: 560px; }
  .hero-art { opacity: .85; }
  .experience-grid, .about-grid { gap: 6%; }
  .timeline-item { grid-template-columns: 1fr; gap: 8px; }
}
@media (max-width: 700px) {
  .shell { width: min(100% - 40px, 520px); }
  .header-inner { height: 66px; }
  .wordmark { font-size: 22px; }
  nav { gap: 16px; }
  nav a { font-size: 12px; }
  .hero { position: relative; display: block; min-height: 0; padding-block: 82px 105px; overflow: hidden; }
  .hero-copy { position: relative; }
  .hero-meta { margin-bottom: 27px; font-size: 12px; }
  h1 { font-size: clamp(94px, 25vw, 130px); }
  .hero-lead { max-width: 430px; font-size: clamp(28px, 7vw, 38px); }
  .hero-description { max-width: 480px; font-size: 14px; }
  .hero-art { position: absolute; z-index: 0; top: 20px; right: -45%; width: 90%; opacity: .25; }
  .art-label { display: none; }
  .section { padding-block: 78px; }
  .section-intro { margin-bottom: 38px; }
  .section-kicker { margin-bottom: 13px; }
  h2 { font-size: clamp(34px, 9vw, 44px); }
  .section-intro > p:last-child { font-size: 14px; }
  .research-item { grid-template-columns: 1fr; gap: 17px; padding-block: 29px 32px; }
  .research-side { flex-direction: row; align-items: center; }
  .research-main h3 { font-size: 23px; }
  .research-main p { font-size: 14px; }
  .experience-grid, .about-grid { display: block; }
  .experience-intro { position: static; }
  .timeline-item { grid-template-columns: 1fr; }
  .contact { padding-block: 82px 88px; }
  .contact-inner > p:not(.section-kicker) { font-size: 14px; }
}
@media (max-width: 380px) {
  .shell { width: calc(100% - 32px); }
  nav { gap: 11px; }
  nav a { font-size: 11px; }
  h1 { font-size: 88px; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; }
}