:root {
  --bg: #f5f2ea;
  --bg-soft: #ebe6da;
  --surface: rgba(255, 255, 255, .68);
  --surface-solid: #fffdf8;
  --ink: #172524;
  --muted: #66706d;
  --line: rgba(23, 37, 36, .14);
  --accent: #136f63;
  --accent-soft: #d8ebe5;
  --accent-2: #c77955;
  --shadow: 0 24px 70px rgba(45, 50, 45, .10);
  --radius: 28px;
  --container: 1180px;
  --serif: "Newsreader", Georgia, serif;
  --sans: "DM Sans", Arial, sans-serif;
}

html[data-theme="dark"] {
  --bg: #101716;
  --bg-soft: #17201f;
  --surface: rgba(28, 40, 38, .78);
  --surface-solid: #182220;
  --ink: #edf3ef;
  --muted: #aebbb6;
  --line: rgba(230, 242, 237, .14);
  --accent: #81cabb;
  --accent-soft: #203f39;
  --accent-2: #e5a17e;
  --shadow: 0 24px 70px rgba(0, 0, 0, .24);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  font-family: var(--sans);
  color: var(--ink);
  background:
    radial-gradient(circle at 9% 8%, rgba(199, 121, 85, .13), transparent 28rem),
    radial-gradient(circle at 91% 22%, rgba(19, 111, 99, .12), transparent 32rem),
    var(--bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; }

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

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

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.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;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 999;
  transform: translateY(-160%);
  padding: 10px 16px;
  color: var(--surface-solid);
  background: var(--ink);
  border-radius: 999px;
  text-decoration: none;
}

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

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  border-bottom: 1px solid transparent;
  transition: background .25s ease, border-color .25s ease, backdrop-filter .25s ease;
}

.site-header.scrolled {
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  min-height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  text-decoration: none;
  letter-spacing: -.02em;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: var(--surface-solid);
  background: var(--ink);
  border-radius: 50%;
  font-family: var(--serif);
  font-size: 15px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 26px;
}

.main-nav > a {
  position: relative;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
}

.main-nav > a::after {
  content: "";
  position: absolute;
  inset: auto 0 -8px;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .2s ease;
}

.main-nav > a:hover,
.main-nav > a:focus-visible { color: var(--ink); }

.main-nav > a:hover::after,
.main-nav > a:focus-visible::after { transform: scaleX(1); }

.theme-toggle,
.nav-toggle {
  border: 0;
  color: var(--ink);
  background: transparent;
  cursor: pointer;
}

.theme-toggle {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border: 1px solid var(--line);
  border-radius: 50%;
  font-size: 20px;
}

.nav-toggle { display: none; }

.hero {
  position: relative;
  min-height: 820px;
  padding: 155px 0 95px;
  overflow: hidden;
}

.hero-grid {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1.03fr) minmax(460px, .97fr);
  gap: 58px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 18px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  text-transform: uppercase;
}

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

h1, h2 {
  font-family: var(--serif);
  font-weight: 600;
  letter-spacing: -.045em;
  line-height: 1.02;
}

h1 {
  max-width: 740px;
  margin-bottom: 28px;
  font-size: clamp(58px, 7vw, 94px);
}

h1 em {
  color: var(--accent);
  font-weight: 500;
}

h2 {
  margin-bottom: 26px;
  font-size: clamp(42px, 5vw, 66px);
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.3;
  letter-spacing: -.02em;
}

.hero-lead {
  max-width: 680px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 19px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 44px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 50px;
  padding: 0 22px;
  border: 1px solid transparent;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  text-decoration: none;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}

.button:hover,
.button:focus-visible { transform: translateY(-2px); }

.button-primary {
  color: var(--surface-solid);
  background: var(--ink);
  box-shadow: 0 12px 28px rgba(20, 37, 35, .15);
}

html[data-theme="dark"] .button-primary {
  color: #10201d;
  background: var(--accent);
}

.button-secondary {
  border-color: var(--line);
  background: var(--surface);
  backdrop-filter: blur(12px);
}

.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  margin: 0;
  padding: 0;
  color: var(--muted);
  font-size: 13px;
  list-style: none;
}

.hero-meta li {
  position: relative;
  padding-left: 14px;
}

.hero-meta li::before {
  content: "";
  position: absolute;
  top: .75em;
  left: 0;
  width: 5px;
  height: 5px;
  background: var(--accent-2);
  border-radius: 50%;
}

.hero-visual {
  position: relative;
  width: 100%;
  color: var(--accent);
}

.hero-visual svg { filter: drop-shadow(0 25px 60px rgba(19, 111, 99, .10)); }

.visual-halo {
  fill: var(--surface);
  stroke: var(--line);
  stroke-width: 1;
}

.visual-ring {
  fill: none;
  stroke: var(--line);
  stroke-width: 1;
}

.visual-ring-dash {
  stroke-dasharray: 5 14;
  animation: rotate 55s linear infinite;
  transform-origin: center;
}

.network-lines {
  fill: none;
  stroke: currentColor;
  stroke-width: 1.2;
  opacity: .24;
}

.network-nodes {
  fill: var(--accent-2);
  opacity: .72;
}

.brain-shape { stroke-width: 8; }

.visual-label {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 11px;
  padding: 11px 15px 11px 11px;
  color: var(--ink);
  background: color-mix(in srgb, var(--surface-solid) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
  font-size: 12px;
}

.visual-label span {
  display: grid;
  place-items: center;
  width: 30px; height: 30px;
  color: var(--surface-solid);
  background: var(--accent);
  border-radius: 50%;
  font-size: 10px;
  font-weight: 700;
}

html[data-theme="dark"] .visual-label span { color: #10201d; }

.label-one { top: 14%; left: -2%; }
.label-two { right: -1%; bottom: 26%; }
.label-three { bottom: 8%; left: 16%; }

.hero-orbit {
  position: absolute;
  border: 1px solid var(--line);
  border-radius: 50%;
  opacity: .45;
  pointer-events: none;
}

.hero-orbit-one {
  width: 380px; height: 380px;
  top: 80px; right: -240px;
}

.hero-orbit-two {
  width: 180px; height: 180px;
  bottom: 20px; left: -90px;
}

.section { padding: 120px 0; }

.two-column {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 100px;
  align-items: start;
}

.section-heading { max-width: 530px; }

.large-copy {
  color: var(--ink);
  font-family: var(--serif);
  font-size: clamp(27px, 3vw, 37px);
  line-height: 1.25;
  letter-spacing: -.025em;
}

.about-copy > p:not(.large-copy) {
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
}

.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  margin-top: 45px;
}

.principles article {
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.principles span,
.card-index {
  color: var(--accent-2);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
}

.principles h3 {
  margin-top: 22px;
  font-size: 16px;
}

.principles p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.6;
}

.research-section { background: var(--bg-soft); }

.section-heading-wide {
  max-width: none;
  display: grid;
  grid-template-columns: 1fr .65fr;
  gap: 70px;
  align-items: end;
  margin-bottom: 54px;
}

.section-heading-wide h2 { margin-bottom: 0; }
.section-heading-wide > p { color: var(--muted); font-size: 17px; }

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

.research-card {
  min-height: 440px;
  display: flex;
  flex-direction: column;
  padding: 28px;
  background: var(--surface-solid);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 0 0 transparent;
  transition: transform .25s ease, box-shadow .25s ease;
}

.research-card:hover {
  transform: translateY(-7px);
  box-shadow: var(--shadow);
}

.card-icon {
  display: grid;
  place-items: center;
  width: 66px; height: 66px;
  margin: 48px 0 28px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 20px;
}

.card-icon svg {
  width: 37px;
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 2;
}

.research-card h3 {
  max-width: 280px;
  font-family: var(--serif);
  font-size: 30px;
  font-weight: 600;
}

.research-card > p {
  margin-bottom: 24px;
  color: var(--muted);
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin: auto 0 0;
  padding: 0;
  list-style: none;
}

.tag-list li,
.status-pill {
  display: inline-flex;
  padding: 7px 10px;
  color: var(--muted);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
}

.work-section .section-heading { margin-bottom: 60px; }

.work-list { border-top: 1px solid var(--line); }

.work-item {
  display: grid;
  grid-template-columns: 100px 1fr 130px;
  gap: 30px;
  align-items: center;
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.work-year {
  color: var(--accent-2);
  font-family: var(--serif);
  font-size: 25px;
}

.work-type {
  margin-bottom: 7px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.work-item h3 {
  margin-bottom: 8px;
  font-family: var(--serif);
  font-size: 27px;
  font-weight: 600;
}

.work-item p:last-child {
  max-width: 750px;
  margin-bottom: 0;
  color: var(--muted);
}

.text-link {
  justify-self: end;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}

.text-link span { color: var(--accent); }

.status-pill {
  justify-self: end;
  color: var(--accent);
  background: var(--accent-soft);
}

.edit-note {
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 12px;
}

.experience-section { background: var(--bg-soft); }

.timeline {
  margin-bottom: 60px;
  border-left: 1px solid var(--line);
}

.timeline article {
  position: relative;
  padding: 0 0 38px 34px;
}

.timeline article:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  top: 7px;
  left: -6px;
  width: 11px;
  height: 11px;
  background: var(--accent);
  border: 3px solid var(--bg-soft);
  border-radius: 50%;
}

.timeline-date {
  margin-bottom: 4px;
  color: var(--accent-2);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.timeline h3 {
  margin-bottom: 7px;
  font-family: var(--serif);
  font-size: 26px;
  font-weight: 600;
}

.timeline p:last-child {
  max-width: 680px;
  color: var(--muted);
}

.toolkit {
  padding: 30px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toolkit > h3 { font-family: var(--serif); font-size: 27px; }

.tool-groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.tool-groups p {
  margin-bottom: 10px;
  color: var(--accent);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
}

.tool-groups span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}

.contact-section { padding-bottom: 85px; }

.contact-panel {
  display: grid;
  grid-template-columns: 1fr .55fr;
  gap: 70px;
  align-items: end;
  padding: 70px;
  color: #f1f5f2;
  background:
    radial-gradient(circle at 75% 20%, rgba(129, 202, 187, .18), transparent 23rem),
    #162522;
  border-radius: 36px;
  box-shadow: var(--shadow);
}

.contact-panel .eyebrow { color: #82ccbc; }
.contact-panel h2 { max-width: 760px; margin-bottom: 22px; }
.contact-panel p:not(.eyebrow) { max-width: 700px; margin-bottom: 0; color: #b9c5c1; }

.contact-actions {
  display: grid;
  gap: 10px;
}

.contact-actions .button-primary {
  color: #142320;
  background: #eef4f0;
}

.contact-actions .button-secondary {
  color: #eef4f0;
  border-color: rgba(238, 244, 240, .18);
  background: rgba(255, 255, 255, .05);
}

.site-footer { padding: 0 0 34px; }

.footer-inner {
  display: flex;
  gap: 25px;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  color: var(--muted);
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.footer-inner p { margin: 0; }
.footer-inner a { font-weight: 700; text-decoration: none; }

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .7s ease, transform .7s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes rotate {
  to { transform: rotate(360deg); }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    scroll-behavior: auto !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .reveal { opacity: 1; transform: none; }
}

@media (max-width: 980px) {
  .hero { padding-top: 135px; }
  .hero-grid { grid-template-columns: 1fr; }
  .hero-copy { max-width: 780px; }
  .hero-visual { max-width: 620px; margin: 0 auto; }
  .two-column { grid-template-columns: 1fr; gap: 32px; }
  .section-heading { max-width: 720px; }
  .card-grid { grid-template-columns: 1fr; }
  .research-card { min-height: 0; }
  .section-heading-wide { grid-template-columns: 1fr; gap: 10px; }
  .contact-panel { grid-template-columns: 1fr; }
}

@media (max-width: 760px) {
  .container { width: min(calc(100% - 28px), var(--container)); }

  .nav-toggle {
    position: relative;
    z-index: 2;
    display: grid;
    gap: 5px;
    padding: 10px;
  }

  .nav-toggle span:not(.sr-only) {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--ink);
    transition: transform .2s ease;
  }

  .nav-toggle[aria-expanded="true"] span:nth-child(2) { transform: translateY(3.5px) rotate(45deg); }
  .nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-3.5px) rotate(-45deg); }

  .main-nav {
    position: fixed;
    inset: 0;
    display: grid;
    align-content: center;
    justify-items: center;
    gap: 23px;
    background: var(--bg);
    transform: translateY(-105%);
    transition: transform .3s ease;
  }

  .main-nav.open { transform: translateY(0); }
  .main-nav > a { font-family: var(--serif); font-size: 33px; }

  .hero { min-height: auto; padding: 125px 0 70px; }
  h1 { font-size: clamp(50px, 15vw, 76px); }
  .hero-lead { font-size: 17px; }
  .hero-meta { display: grid; gap: 8px; }

  .hero-visual { margin-top: -20px; }
  .visual-label { font-size: 10px; }
  .label-one { top: 10%; left: 0; }
  .label-two { right: 0; bottom: 24%; }

  .section { padding: 82px 0; }
  .principles { grid-template-columns: 1fr; }
  .work-item { grid-template-columns: 1fr; gap: 9px; padding: 28px 0; }
  .text-link, .status-pill { justify-self: start; }
  .tool-groups { grid-template-columns: 1fr 1fr; }
  .contact-panel { padding: 38px 25px; border-radius: 26px; }
  .footer-inner { align-items: flex-start; flex-direction: column; gap: 7px; }
}

@media (max-width: 480px) {
  .hero-actions { display: grid; }
  .hero-actions .button { width: 100%; }
  .visual-label { display: none; }
  .tool-groups { grid-template-columns: 1fr; }
}


/* Language switch and Chinese typography */
.lang-switch {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 50px;
  height: 38px;
  padding: 0 12px;
  color: var(--ink) !important;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 12px !important;
  font-weight: 700;
  line-height: 1;
  text-decoration: none;
  letter-spacing: .04em;
  backdrop-filter: blur(12px);
  transition: transform .2s ease, background .2s ease, border-color .2s ease;
}

.main-nav > a.lang-switch::after { display: none; }

.lang-switch:hover,
.lang-switch:focus-visible {
  color: var(--surface-solid) !important;
  background: var(--accent);
  border-color: var(--accent);
  transform: translateY(-1px);
}

html[lang="zh-CN"] body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", var(--sans), sans-serif;
  line-height: 1.78;
}

html[lang="zh-CN"] h1,
html[lang="zh-CN"] h2,
html[lang="zh-CN"] .large-copy,
html[lang="zh-CN"] .research-card h3,
html[lang="zh-CN"] .work-item h3,
html[lang="zh-CN"] .timeline h3,
html[lang="zh-CN"] .toolkit > h3 {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "Microsoft YaHei", serif;
  letter-spacing: -.025em;
}

html[lang="zh-CN"] .eyebrow {
  letter-spacing: .1em;
}

html[lang="zh-CN"] .hero-lead,
html[lang="zh-CN"] .about-copy > p:not(.large-copy),
html[lang="zh-CN"] .section-heading-wide > p {
  line-height: 1.85;
}

@media (max-width: 760px) {
  .main-nav > a.lang-switch {
    min-width: 72px;
    height: 42px;
    font-family: var(--sans);
    font-size: 13px !important;
  }
}

/* About section photo */
.about-photo-card {
  max-width: 340px;
  margin-top: 34px;
  padding: 14px;
  background: color-mix(in srgb, var(--surface-solid) 88%, transparent);
  border: 1px solid var(--line);
  border-radius: 30px;
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.about-photo-frame {
  overflow: hidden;
  border-radius: 22px;
  aspect-ratio: 4 / 5;
  background: var(--bg-soft);
}

.about-photo-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
}

.about-photo-caption {
  padding: 16px 6px 4px;
}

.about-photo-name {
  margin: 0;
  font-family: var(--serif);
  font-size: clamp(28px, 3vw, 34px);
  font-weight: 600;
  line-height: 1.05;
  letter-spacing: -.03em;
}

.about-photo-subname {
  margin: 6px 0 8px;
  color: var(--accent);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .05em;
}

.about-photo-role {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

html[lang="zh-CN"] .about-photo-name,
html[lang="zh-CN"] .about-photo-subname {
  letter-spacing: 0;
}

@media (max-width: 980px) {
  .about-photo-card {
    max-width: 360px;
  }
}

@media (max-width: 760px) {
  .about-photo-card {
    max-width: 320px;
    margin-top: 24px;
  }
}

/* Smartphone optimisation */
html,
body {
  max-width: 100%;
  overflow-x: clip;
}

h1,
h2,
h3,
p,
a {
  overflow-wrap: break-word;
}

button,
.button,
.lang-switch,
.main-nav > a {
  touch-action: manipulation;
}

@media (hover: none) {
  .button:hover,
  .button:focus-visible,
  .research-card:hover,
  .lang-switch:hover,
  .lang-switch:focus-visible {
    transform: none;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 76px;
  }

  .site-header {
    padding-top: env(safe-area-inset-top);
  }

  .site-header.scrolled {
    background: color-mix(in srgb, var(--bg) 94%, transparent);
  }

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

  .brand {
    gap: 9px;
    font-size: 15px;
  }

  .brand-mark {
    width: 34px;
    height: 34px;
    font-size: 13px;
  }

  .nav-toggle {
    min-width: 44px;
    min-height: 44px;
    place-content: center;
    border-radius: 50%;
  }

  .main-nav {
    inset: 0;
    min-height: 100dvh;
    padding:
      calc(90px + env(safe-area-inset-top))
      max(24px, env(safe-area-inset-right))
      calc(34px + env(safe-area-inset-bottom))
      max(24px, env(safe-area-inset-left));
    align-content: start;
    overflow-y: auto;
    overscroll-behavior: contain;
    gap: 14px;
  }

  .main-nav > a:not(.lang-switch) {
    width: min(100%, 360px);
    padding: 7px 0;
    text-align: center;
    font-size: clamp(27px, 8vw, 34px);
    line-height: 1.18;
  }

  .main-nav > a::after {
    display: none;
  }

  .theme-toggle,
  .main-nav > a.lang-switch {
    width: 54px;
    min-width: 54px;
    height: 46px;
    margin-top: 4px;
  }

  .hero {
    min-height: auto;
    padding: calc(104px + env(safe-area-inset-top)) 0 58px;
  }

  .hero-grid {
    gap: 34px;
  }

  h1 {
    max-width: 100%;
    margin-bottom: 22px;
    font-size: clamp(43px, 12vw, 60px);
    line-height: 1.01;
    letter-spacing: -.04em;
  }

  h2 {
    font-size: clamp(34px, 9.8vw, 47px);
    line-height: 1.06;
  }

  .eyebrow {
    margin-bottom: 14px;
    font-size: 11px;
    line-height: 1.5;
  }

  .hero-lead {
    margin-bottom: 27px;
    font-size: 16px;
    line-height: 1.7;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 10px;
    margin-bottom: 30px;
  }

  .hero-actions .button,
  .contact-actions .button {
    width: 100%;
    min-height: 50px;
  }

  .hero-meta {
    display: grid;
    gap: 7px;
    font-size: 12px;
  }

  .hero-visual {
    width: min(100%, 430px);
    margin: 0 auto;
  }

  .hero-visual svg {
    width: 96%;
    margin: 0 auto;
  }

  .visual-label {
    display: none;
  }

  .section {
    padding: 70px 0;
  }

  .two-column {
    gap: 28px;
  }

  .section-heading,
  .about-copy,
  .experience-content {
    min-width: 0;
  }

  .large-copy {
    font-size: clamp(25px, 7vw, 32px);
    line-height: 1.3;
  }

  .about-copy > p:not(.large-copy),
  .section-heading-wide > p {
    font-size: 16px;
  }

  .about-photo-card {
    width: min(100%, 286px);
    margin: 24px auto 0;
    padding: 11px;
    border-radius: 24px;
  }

  .about-photo-frame {
    border-radius: 18px;
  }

  .about-photo-caption {
    padding: 13px 5px 3px;
  }

  .about-photo-name {
    font-size: 28px;
  }

  .about-photo-role {
    font-size: 12px;
  }

  .principles {
    gap: 22px;
    margin-top: 34px;
  }

  .principles article {
    padding-top: 17px;
  }

  .principles h3 {
    margin-top: 14px;
  }

  .section-heading-wide {
    margin-bottom: 34px;
  }

  .card-grid {
    gap: 14px;
  }

  .research-card {
    padding: 22px;
    border-radius: 22px;
  }

  .card-icon {
    width: 58px;
    height: 58px;
    margin: 30px 0 22px;
    border-radius: 17px;
  }

  .research-card h3 {
    max-width: none;
    font-size: 27px;
  }

  .research-card > p {
    font-size: 15px;
  }

  .work-section .section-heading {
    margin-bottom: 36px;
  }

  .work-item {
    padding: 25px 0;
  }

  .work-item h3 {
    font-size: 24px;
    line-height: 1.22;
  }

  .work-item p:last-child {
    font-size: 14px;
  }

  .text-link,
  .status-pill {
    min-height: 42px;
    align-items: center;
  }

  .text-link {
    display: inline-flex;
    padding: 6px 0;
  }

  .timeline {
    margin-bottom: 42px;
  }

  .timeline article {
    padding: 0 0 30px 27px;
  }

  .timeline h3 {
    font-size: 23px;
  }

  .toolkit {
    padding: 22px;
    border-radius: 22px;
  }

  .toolkit > h3 {
    font-size: 24px;
  }

  .tool-groups {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .contact-section {
    padding-bottom: 58px;
  }

  .contact-panel {
    gap: 32px;
    padding: 32px 20px;
    border-radius: 24px;
  }

  .contact-panel h2 {
    font-size: clamp(33px, 9vw, 44px);
  }

  .contact-panel p:not(.eyebrow) {
    font-size: 15px;
  }

  .contact-actions {
    gap: 9px;
  }

  .footer-inner {
    padding-bottom: max(0px, env(safe-area-inset-bottom));
  }
}

@media (max-width: 420px) {
  .container {
    width: min(calc(100% - 24px), var(--container));
  }

  h1 {
    font-size: clamp(40px, 12.5vw, 52px);
  }

  html[lang="zh-CN"] h1 {
    font-size: clamp(38px, 11.5vw, 49px);
    line-height: 1.08;
  }

  .hero {
    padding-top: calc(96px + env(safe-area-inset-top));
  }

  .hero-visual {
    width: min(100%, 350px);
  }

  .section {
    padding: 62px 0;
  }

  .research-card,
  .toolkit {
    padding: 20px;
  }

  .contact-panel {
    padding: 29px 18px;
  }
}

@media (max-width: 360px) {
  .brand span:last-child {
    font-size: 14px;
  }

  h1 {
    font-size: 39px;
  }

  .button {
    padding-inline: 17px;
  }

  .about-photo-card {
    width: min(100%, 260px);
  }
}