:root {
  color-scheme: light;
  --ink: #17354e;
  --muted: #5e7588;
  --blue: #287bb2;
  --blue-dark: #1e5d8a;
  --blue-soft: #d9edf9;
  --sky: #eef7fc;
  --sky-pale: #f6fbfe;
  --line: #d4e4ef;
  --white: #fff;
  --max: 1160px;
  --sans: Inter, "Aptos", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: Georgia, "Noto Serif SC", "Songti SC", serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 92px; }
body { margin: 0; color: var(--ink); background: var(--sky-pale); font: 16px/1.7 var(--sans); }
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
a:hover { color: var(--blue-dark); }
button { color: inherit; font: inherit; }
.shell { width: min(var(--max), calc(100% - 48px)); margin: 0 auto; }
.i18n { display: none; }
body[data-lang="en"] .i18n-en { display: inline; }
body[data-lang="zh"] .i18n-zh { display: inline; }
.i18n-block { display: none; }
body[data-lang="en"] .i18n-block[data-lang="en"] { display: block; }
body[data-lang="zh"] .i18n-block[data-lang="zh"] { display: block; }
.skip-link { position: absolute; z-index: 100; top: -5rem; left: 1rem; padding: .65rem 1rem; border-radius: 6px; background: var(--white); box-shadow: 0 5px 18px #17354e22; }
.skip-link:focus { top: 1rem; }

.site-header { position: sticky; z-index: 30; top: 0; border-bottom: 1px solid #d8e7f0cc; background: #f7fbfef0; backdrop-filter: blur(16px); }
.nav-shell { display: flex; min-height: 78px; align-items: center; justify-content: space-between; gap: 1.5rem; }
.brand { display: flex; flex-direction: column; flex: 0 0 auto; line-height: 1.25; }
.brand-title { color: var(--ink); font-family: var(--serif); font-size: 1.22rem; font-weight: 650; letter-spacing: .06em; }
.brand-note { margin-top: .27rem; color: var(--muted); font-size: .58rem; font-weight: 650; letter-spacing: .15em; text-transform: uppercase; }
.primary-nav { display: flex; align-items: center; gap: clamp(.8rem, 2vw, 1.7rem); }
.primary-nav a { position: relative; padding: .6rem 0; color: #486276; font-size: .79rem; font-weight: 650; white-space: nowrap; }
.primary-nav a::after { position: absolute; right: 0; bottom: .3rem; left: 0; height: 1px; background: var(--blue); content: ""; transform: scaleX(0); transform-origin: left; transition: transform .2s ease; }
.primary-nav a:hover::after, .primary-nav a:focus-visible::after { transform: scaleX(1); }
.language-switch { display: inline-flex; flex: 0 0 auto; gap: 2px; padding: 3px; border: 1px solid var(--line); border-radius: 999px; background: var(--white); }
.language-switch button, .language-switch a { min-width: 39px; padding: .36rem .58rem; border: 0; border-radius: 999px; background: transparent; color: var(--muted); cursor: pointer; font-size: .69rem; font-weight: 750; text-align: center; }
.language-switch button[aria-pressed="true"], .language-switch a[aria-current="page"] { background: #dcedf8; color: var(--blue-dark); }
.menu-toggle { display: none; width: 40px; height: 40px; border: 1px solid var(--line); border-radius: 50%; background: var(--white); font-size: 1rem; }

.hero { position: relative; overflow: hidden; padding: 78px 0 74px; background: linear-gradient(120deg, #f8fcff 6%, #e8f4fb 100%); }
.hero-orbit { position: absolute; top: -19rem; right: -12rem; width: 47rem; height: 47rem; border: 1px solid #91c5e149; border-radius: 50%; box-shadow: 0 0 0 54px #b5d8ec20, 0 0 0 108px #b5d8ec12; pointer-events: none; }
.hero-grid { position: relative; display: grid; grid-template-columns: 1.12fr .88fr; align-items: center; gap: clamp(2.5rem, 7vw, 6.8rem); }
.hero-copy { padding: 8px 0; }
.eyebrow { margin: 0; color: var(--blue); font-size: .82rem; font-weight: 800; letter-spacing: .16em; line-height: 1.5; text-transform: uppercase; }
.hero h1 { margin: 1.35rem 0 .7rem; font-family: var(--serif); font-size: clamp(2.1rem, 3.8vw, 3.3rem); font-weight: 500; letter-spacing: -.04em; line-height: 1.12; }
.hero-name { margin: .9rem 0 0; color: var(--blue-dark); font-size: 1.08rem; font-weight: 720; letter-spacing: .035em; }
.hero-summary { max-width: 635px; margin: 1.1rem 0 0; color: #4f687d; font-size: .98rem; line-height: 1.85; }
.hero-actions { display: flex; flex-wrap: wrap; gap: .7rem; margin-top: 1.8rem; }
.button { display: inline-flex; min-height: 44px; align-items: center; justify-content: center; gap: .7rem; padding: .7rem 1rem; border: 1px solid transparent; border-radius: 5px; font-size: .77rem; font-weight: 750; transition: transform .18s ease, background .18s ease, border-color .18s ease; }
.button:hover { transform: translateY(-2px); }
.button-primary { background: var(--blue); color: var(--white); }
.button-primary:hover { background: var(--blue-dark); color: var(--white); }
.button-secondary { border-color: #b9d2e2; background: #ffffffa8; color: var(--ink); }
.button-secondary:hover { border-color: var(--blue); background: var(--white); }
.hero-keywords { display: flex; flex-wrap: wrap; gap: .5rem; margin-top: 1.7rem; }
.hero-keywords span { padding: .34rem .6rem; border: 1px solid #c6ddeb; border-radius: 999px; color: #52748b; font-size: .64rem; font-weight: 650; }
.portrait-wrap { position: relative; width: min(100%, 400px); justify-self: end; padding: 0 21px 23px 0; }
.portrait-halo { position: absolute; top: -21px; right: -4px; width: 76%; height: 80%; border: 1px solid #83b8d5; border-radius: 49% 49% 8px 8px; transform: rotate(5deg); }
.portrait-frame { position: relative; overflow: hidden; margin: 0; aspect-ratio: 4 / 4.6; border-radius: 47% 47% 8px 8px; background: #d8e8ef; box-shadow: 0 24px 60px #244c651c; }
.portrait-frame::after { position: absolute; inset: 0; background: linear-gradient(180deg, transparent 52%, #12354a9e 100%); content: ""; pointer-events: none; }
.portrait-frame img { width: 100%; height: 100%; object-fit: cover; object-position: center 27%; filter: saturate(.86); }
.portrait-frame figcaption { position: absolute; z-index: 1; right: 1.4rem; bottom: 1.35rem; left: 1.4rem; color: var(--white); }
.portrait-frame figcaption span { display: block; opacity: .85; font-size: .58rem; letter-spacing: .12em; text-transform: uppercase; }
.portrait-frame figcaption strong { display: block; margin-top: .3rem; font-family: var(--serif); font-size: 1.15rem; font-weight: 500; }
.portrait-note { position: absolute; z-index: 2; bottom: 0; left: -1.2rem; display: flex; align-items: center; gap: .55rem; padding: .72rem .9rem; border: 1px solid #d2e5f1; border-radius: 4px; background: var(--white); box-shadow: 0 9px 26px #244c6517; color: #31556d; font-size: .68rem; font-weight: 700; }
.note-dot { width: 8px; height: 8px; border-radius: 50%; background: #4f9ccc; box-shadow: 0 0 0 4px #4f9ccc1e; }


.section { padding: 84px 0; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 2rem; margin-bottom: 2.1rem; }
.section-heading h2, .profile-summary h2 { margin: .65rem 0 0; font-family: var(--serif); font-size: clamp(2rem, 4vw, 3.15rem); font-weight: 500; letter-spacing: -.04em; line-height: 1.12; }
.section-lede { max-width: 425px; margin: 0; color: var(--muted); font-size: .85rem; line-height: 1.75; }
.research-section { background: var(--white); }
.figure-slider { position: relative; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.slider-track { display: flex; overflow-x: auto; scroll-snap-type: x mandatory; scroll-behavior: smooth; overscroll-behavior-x: contain; scrollbar-width: none; }
.slider-track::-webkit-scrollbar { display: none; }
.slider-track:focus-visible { outline: 2px solid var(--blue); outline-offset: 4px; }
.slide { display: grid; flex: 0 0 100%; grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr); gap: 2.4rem; align-items: center; margin: 0; padding: 1.6rem 0; scroll-snap-align: start; }
.slide-media { display: flex; height: 430px; align-items: center; justify-content: center; overflow: hidden; padding: 1rem; border: 1px solid var(--line); border-radius: 6px; background: #fff; }
.slide-media img { width: auto; height: auto; max-width: 100%; max-height: 100%; }
.slide-meta { display: flex; flex-wrap: wrap; gap: .35rem .9rem; margin: 0; color: #5584a3; font-size: .7rem; font-weight: 750; letter-spacing: .04em; }
.slide-copy h3 { margin: .75rem 0 .7rem; font-family: var(--serif); font-size: 1.28rem; font-weight: 600; line-height: 1.4; }
.slide-finding { margin: 0 0 1.1rem; color: var(--muted); font-size: .84rem; line-height: 1.8; }
.slider-arrow { position: absolute; top: calc(1.6rem + 215px); display: grid; width: 44px; height: 44px; place-items: center; padding: 0; border: 0; border-radius: 50%; background: #17354e73; color: #fff; font-size: 1.7rem; line-height: 1; cursor: pointer; transform: translateY(-50%); transition: background .2s; }
.slider-arrow:hover, .slider-arrow:focus-visible { background: #17354ecc; }
.slider-arrow:focus-visible { outline: 2px solid var(--blue); outline-offset: 2px; }
.slider-prev { left: .8rem; }
.slider-next { left: calc((100% - 2.4rem) * 1.55 / 2.55 - 44px - .8rem); }
.slider-dots { display: flex; justify-content: center; gap: .55rem; padding: .2rem 0 1.4rem; }
.slider-dot { width: 9px; height: 9px; padding: 0; border: 0; border-radius: 50%; background: #c5dbe9; cursor: pointer; transition: width .2s, background .2s; }
.slider-dot[aria-current="true"] { width: 26px; border-radius: 5px; background: var(--blue); }
.slider-dot:focus-visible { outline: 2px solid var(--blue); outline-offset: 3px; }

.profile-section { background: var(--sky); }
.profile-grid { display: grid; grid-template-columns: .76fr 1.24fr; gap: clamp(3rem, 7vw, 7rem); align-items: start; }
.profile-summary { position: sticky; top: 112px; }
.profile-summary h2 { margin-top: .8rem; }
.profile-summary > p:not(.eyebrow) { max-width: 430px; margin: 1.15rem 0 1.4rem; color: var(--muted); font-size: .88rem; line-height: 1.9; }
.text-link { display: inline-flex; align-items: center; gap: .55rem; color: var(--blue-dark); font-size: .77rem; font-weight: 750; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.profile-details { border-top: 1px solid #cddfea; }
.profile-block { padding: 1.45rem 0; border-bottom: 1px solid #cddfea; }
.profile-block h3 { margin: 0 0 .95rem; color: #366383; font-size: .72rem; font-weight: 800; letter-spacing: .11em; text-transform: uppercase; }
.timeline-item { display: grid; grid-template-columns: 126px 1fr; gap: 1.1rem; padding: .63rem 0; }
.timeline-date { color: #5584a3; font-size: .7rem; font-weight: 750; }
.timeline-item strong { font-size: .84rem; font-weight: 750; }
.timeline-item p { margin: .2rem 0 0; color: var(--muted); font-size: .76rem; line-height: 1.6; }
.service-block > p { margin: 0; color: #536d80; font-size: .79rem; line-height: 1.85; }

.publications-section { background: #fff; }
.publication-list { border-top: 1px solid var(--line); }
.publication-card { display: grid; grid-template-columns: 67px minmax(0, 1fr) 36px; gap: 1rem; align-items: start; padding: 1.15rem 0; border-bottom: 1px solid var(--line); }
.publication-year { padding-top: .1rem; color: var(--blue); font-family: var(--serif); font-size: 1rem; font-weight: 650; }
.publication-copy h3 { max-width: 850px; margin: 0; font-family: var(--serif); font-size: 1.05rem; font-weight: 550; line-height: 1.48; }
.publication-copy h3 a:hover { color: var(--blue); }
.publication-copy p { margin: .32rem 0 0; color: var(--muted); font-size: .73rem; }
.publication-copy .publication-authors { color: #42657d; font-size: .69rem; }
.publication-copy .publication-journal { margin-top: .18rem; font-size: .68rem; }
.publication-link { display: grid; width: 32px; height: 32px; place-items: center; border: 1px solid var(--line); border-radius: 50%; color: var(--blue); font-size: .84rem; }
.publication-link:hover { border-color: var(--blue); background: var(--sky); }
.section-footer { display: flex; align-items: center; justify-content: space-between; gap: 1.2rem; margin-top: 1.35rem; color: var(--muted); font-size: .73rem; }


.contact-section { background: #e8f4fb; }
.contact-grid { display: grid; grid-template-columns: .82fr 1.18fr; gap: 3.5rem; align-items: start; }
.contact-summary { max-width: 400px; margin: 1rem 0 0; color: var(--muted); font-size: .86rem; line-height: 1.8; }
.contact-details { display: grid; gap: .85rem; }
.contact-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; }
.contact-card { display: flex; min-width: 0; min-height: 75px; align-items: center; gap: .7rem; padding: .85rem; border: 1px solid #cfe1ed; border-radius: 6px; background: #ffffffcf; }
.contact-card:hover { border-color: #8bb9d4; color: var(--blue-dark); }
.contact-icon { display: grid; width: 33px; height: 33px; flex: 0 0 33px; place-items: center; border: 1px solid #d7e8f2; border-radius: 50%; background: #f4faff; color: var(--blue-dark); font-size: .61rem; font-weight: 800; }
.contact-card strong { display: block; font-size: .72rem; font-weight: 750; }
.contact-card small { display: block; overflow-wrap: anywhere; margin-top: .15rem; color: var(--muted); font-size: .62rem; line-height: 1.4; }
.contact-arrow { margin-left: auto; color: #528aad; font-size: .8rem; }
.contact-static { border-style: dashed; }
.official-account { display: flex; align-items: center; gap: 1.1rem; margin: 0; padding: .9rem; border: 1px solid #cfe1ed; border-radius: 6px; background: #ffffffcf; }
.official-account-qr { width: 136px; height: 136px; flex: 0 0 136px; object-fit: contain; border-radius: 4px; }
.official-account-copy { min-width: 0; }
.contact-primary { display: grid; max-width: 400px; margin-top: 1.4rem; }
.qr-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: .65rem; container-type: inline-size; }
@container (max-width: 560px) {
  .qr-cards .official-account { flex-direction: column; text-align: center; }
}

.official-account-copy h3 { margin: .35rem 0; font-family: var(--serif); font-size: 1.18rem; font-weight: 600; }
.official-account-copy .eyebrow { font-size: .68rem; }
.official-account-copy p:not(.eyebrow) { margin: 0; color: var(--muted); font-size: .77rem; line-height: 1.65; }
.official-account-id { display: inline-block; margin-top: .45rem; color: var(--blue-dark); font-size: .7rem; font-weight: 700; }

.site-footer { padding: 1.45rem 1rem 1.6rem; border-top: 1px solid var(--line); background: var(--white); text-align: center; }
.footer-brand { color: var(--ink); font-family: var(--serif); font-size: .96rem; font-weight: 650; letter-spacing: .07em; }
.copyright { margin: .35rem 0 .9rem; color: #728697; font-size: .65rem; }
.filing-records { display: flex; flex-direction: column; align-items: center; gap: .25rem; color: #586f80; font-size: .68rem; line-height: 1.6; }
.icp-number { color: #4f687a; font-weight: 700; }
.filing-query { color: #718594; font-size: .62rem; text-decoration: underline; text-underline-offset: 2px; }
.psb-number { display: inline-flex; align-items: center; gap: .35rem; margin-top: .15rem; color: #4f687a; }
.psb-number img { width: 18px; height: 20px; object-fit: contain; }
.filing-records a:hover { color: var(--blue-dark); }

@media (max-width: 980px) {
  .slide { grid-template-columns: 1fr; gap: 1.2rem; }
  .slide-media { height: 380px; }
  .slider-arrow { top: calc(1.6rem + 190px); }
  .slider-next { left: auto; right: .8rem; }
  .nav-shell { gap: 1rem; }
  .primary-nav { gap: .85rem; }
  .primary-nav a { font-size: .73rem; }
  .hero-grid { gap: 2rem; }
  .contact-grid { gap: 2rem; }
}

@media (max-width: 760px) {
  .shell { width: min(var(--max), calc(100% - 36px)); }
  .nav-shell { min-height: 68px; }
  .menu-toggle { display: grid; flex: 0 0 40px; place-items: center; margin-left: auto; }
  .primary-nav { position: absolute; top: 68px; right: 0; left: 0; display: none; align-items: stretch; gap: .1rem; padding: .8rem 20px 1rem; border-bottom: 1px solid var(--line); background: #f7fbfefa; box-shadow: 0 12px 24px #17354e12; }
  .primary-nav.open { display: flex; flex-direction: column; }
  .primary-nav a { padding: .55rem 0; font-size: .82rem; }
  .primary-nav a::after { display: none; }
  .hero { padding: 54px 0 52px; }
  .hero-grid { grid-template-columns: 1fr; gap: 2rem; }
  .hero h1 { font-size: clamp(2rem, 8.6vw, 2.8rem); }
  .portrait-wrap { width: min(78%, 330px); justify-self: center; margin-top: .5rem; }
  .section { padding: 62px 0; }
  .section-heading { display: block; margin-bottom: 1.55rem; }
  .section-lede { margin-top: .8rem; }
  .profile-grid { grid-template-columns: 1fr; gap: 2.2rem; }
  .profile-summary { position: static; }
  .contact-grid { grid-template-columns: 1fr; gap: 1.6rem; }
}

@media (max-width: 520px) {
  .slide-media { height: 250px; padding: .6rem; }
  .slider-arrow { top: calc(1.6rem + 125px); width: 38px; height: 38px; font-size: 1.45rem; }
  .slide-copy h3 { font-size: 1.1rem; }
  .shell { width: min(var(--max), calc(100% - 30px)); }
  .brand-title { font-size: 1.08rem; }
  .brand-note { font-size: .52rem; }
  .language-switch button { min-width: 34px; padding-inline: .45rem; }
  .hero { padding-top: 42px; }
  .hero-summary { font-size: .88rem; }
  .portrait-wrap { width: min(82%, 310px); }
  .timeline-item { grid-template-columns: 80px 1fr; gap: .7rem; }
  .publication-card { grid-template-columns: 48px minmax(0, 1fr) 30px; gap: .55rem; }
  .publication-copy h3 { font-size: .96rem; }
  .publication-link { width: 28px; height: 28px; }
  .section-footer { align-items: flex-start; flex-direction: column; }
  .contact-cards { grid-template-columns: 1fr; }
  .contact-card { min-height: 68px; }
  .official-account { gap: .8rem; padding: .75rem; }
  .official-account-qr { width: 112px; height: 112px; flex-basis: 112px; }
}

@media (prefers-reduced-motion: reduce) {
  .slider-track { scroll-behavior: auto; }
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition-duration: .01ms !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
}