:root {
  --ink: #28343d;
  --text: #4d5962;
  --muted: #7d8a92;
  --line: #e7ebed;
  --surface: #f7f9f9;
  --accent: #16869a;
  --accent-dark: #0d6575;
  --warm: #d3914b;
  --shadow: 0 18px 40px rgba(24, 49, 57, 0.08);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--text);
  background: #fff;
  font-family: "Source Sans 3", "Noto Sans SC", Arial, sans-serif;
  font-size: 18px;
  line-height: 1.62;
}

a {
  color: inherit;
}

.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;
}

.bdal-link {
  color: #0b6fa4;
  font-style: normal;
  font-weight: 600;
  text-decoration: none;
}

.bdal-link:hover {
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.96);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1280px, calc(100% - 48px));
  min-height: 76px;
  margin: 0 auto;
}

.brand {
  color: var(--ink);
  font-size: 21px;
  font-weight: 700;
  text-decoration: none;
}

.brand-cn,
.brand-divider {
  margin-right: 7px;
}

.brand-divider {
  color: var(--warm);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 34px;
}

.site-nav a {
  position: relative;
  color: #65727a;
  font-size: 16px;
  text-decoration: none;
  transition: color 180ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -26px;
  left: 0;
  height: 2px;
  background: var(--accent);
  content: "";
  opacity: 0;
  transform: scaleX(0.6);
  transition: opacity 180ms ease, transform 180ms ease;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--accent-dark);
}

.site-nav a:hover::after,
.site-nav a.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.menu-button {
  display: none;
  width: 40px;
  height: 40px;
  padding: 9px;
  border: 0;
  background: transparent;
}

.menu-button span:not(.sr-only) {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.page-shell {
  display: grid;
  grid-template-columns: 250px minmax(0, 1fr);
  gap: 64px;
  width: min(1280px, calc(100% - 48px));
  margin: 0 auto;
  padding: 58px 0 24px;
}

.profile-panel {
  align-self: start;
}

.portrait-shell {
  padding: 7px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
}

.portrait-placeholder {
  display: flex;
  aspect-ratio: 1;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: #fff;
  background: #256979;
  box-shadow: var(--shadow);
  letter-spacing: 0;
}

.portrait-placeholder span {
  font-size: 24px;
}

.portrait-placeholder strong {
  font-size: 46px;
  font-weight: 700;
  line-height: 1.1;
}

.portrait-shell img {
  display: block;
  width: 100%;
  aspect-ratio: 1;
  border-radius: 50%;
  object-fit: cover;
}

.profile-panel h1 {
  margin: 22px 0 0;
  color: var(--ink);
  font-size: 26px;
  letter-spacing: 0;
}

.name-en {
  margin: 0;
  color: var(--accent-dark);
  font-weight: 600;
}

.profile-role {
  margin: 18px 0 0;
  color: var(--ink);
  font-weight: 600;
}

.profile-org {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
}

.profile-links {
  display: grid;
  gap: 10px;
  padding: 20px 0 0;
  margin: 20px 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.profile-links li {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 9px;
  align-items: baseline;
  font-size: 16px;
}

.profile-links a {
  text-decoration: none;
  transition: color 180ms ease;
}

.profile-links a:hover {
  color: var(--accent);
}

.icon {
  color: var(--accent);
  font-size: 13px;
  text-align: center;
}

.content {
  min-width: 0;
}

.section {
  padding: 0 0 52px;
  scroll-margin-top: 100px;
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0;
}

h2 {
  margin: 0 0 10px;
  color: var(--ink);
  font-size: 38px;
  line-height: 1.2;
  letter-spacing: 0;
}

.section p {
  max-width: 980px;
  margin: 0 0 22px;
}

.interest-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 20px;
}

.interest-grid article {
  min-height: 164px;
  padding: 19px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
}

.interest-grid span {
  color: var(--warm);
  font-size: 14px;
  font-weight: 700;
}

h3 {
  margin: 4px 0 4px;
  color: var(--ink);
  font-size: 19px;
  line-height: 1.35;
  letter-spacing: 0;
}

.interest-grid p {
  margin: 0;
  color: #6c7880;
  font-size: 16px;
}

.section-heading-row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  border-bottom: 1px solid var(--line);
}

.section-heading-row span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
  text-transform: uppercase;
}

.timeline {
  padding: 0;
  margin: 10px 0 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.timeline time {
  color: var(--accent);
  font-size: 16px;
  font-weight: 700;
}

.timeline p {
  margin: 2px 0 0;
  color: #6c7880;
  font-size: 16px;
}

.contact {
  padding: 28px;
  border-left: 4px solid var(--warm);
  background: var(--surface);
}

.contact h2 {
  font-size: 32px;
}

.contact p {
  margin-bottom: 0;
}

.email-link {
  color: var(--accent-dark);
  font-weight: 700;
  text-decoration-color: rgba(13, 101, 117, 0.4);
  text-underline-offset: 4px;
}

footer {
  padding: 22px 24px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

footer p {
  margin: 0;
}

@media (max-width: 820px) {
  body {
    font-size: 17px;
  }

  .nav-wrap,
  .page-shell {
    width: min(100% - 32px, 640px);
  }

  .nav-wrap {
    min-height: 68px;
  }

  .brand {
    font-size: 17px;
  }

  .menu-button {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 68px;
    right: 0;
    left: 0;
    display: none;
    gap: 0;
    align-items: stretch;
    padding: 6px 16px 12px;
    border-bottom: 1px solid var(--line);
    background: #fff;
  }

  .site-nav.open {
    display: grid;
  }

  .site-nav a {
    padding: 10px 0;
  }

  .site-nav a::after {
    bottom: 4px;
  }

  .page-shell {
    display: block;
    padding-top: 36px;
  }

  .profile-panel {
    display: grid;
    grid-template-columns: 112px 1fr;
    column-gap: 18px;
    margin-bottom: 42px;
  }

  .portrait-shell {
    grid-row: span 4;
    align-self: start;
  }

  .portrait-placeholder span {
    font-size: 15px;
  }

  .portrait-placeholder strong {
    font-size: 27px;
  }

  .profile-panel h1 {
    margin-top: 4px;
    font-size: 24px;
  }

  .name-en {
    font-size: 16px;
  }

  .profile-role {
    margin-top: 7px;
    font-size: 16px;
  }

  .profile-org {
    font-size: 15px;
  }

  .profile-links {
    grid-column: 1 / -1;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin-top: 18px;
  }

  h2 {
    font-size: 32px;
  }

  .interest-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .brand-cn,
  .brand-divider {
    display: none;
  }

  .profile-panel {
    grid-template-columns: 92px 1fr;
    column-gap: 14px;
  }

  .profile-panel h1 {
    font-size: 22px;
  }

  .profile-links {
    display: grid;
    grid-template-columns: 1fr;
  }

  .timeline li {
    display: block;
  }

  .timeline h3 {
    margin-top: 4px;
  }

  .contact {
    padding: 20px;
  }
}