:root {
  color-scheme: light;
  --ink: #17211f;
  --ink-2: #263633;
  --paper: #f8f5ee;
  --paper-2: #efe8db;
  --white: #ffffff;
  --line: rgba(23, 33, 31, 0.14);
  --line-dark: rgba(255, 255, 255, 0.18);
  --teal: #0c7c72;
  --green: #173f35;
  --gold: #c99432;
  --red: #b54a3a;
  --muted: #6d756f;
  --shadow: 0 22px 80px rgba(20, 25, 24, 0.14);
  --max: 1180px;
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Segoe UI",
    Arial,
    sans-serif;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.65;
}

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

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

.progress {
  position: fixed;
  inset: 0 0 auto;
  z-index: 80;
  height: 3px;
  background: transparent;
}

.progress span {
  display: block;
  width: 0;
  height: 100%;
  background: linear-gradient(90deg, var(--gold), var(--teal), var(--red));
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 70;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(18px, 4vw, 54px);
  color: var(--white);
  transition:
    background 0.25s ease,
    color 0.25s ease,
    box-shadow 0.25s ease;
}

.site-header.is-scrolled {
  color: var(--ink);
  background: rgba(248, 245, 238, 0.92);
  box-shadow: 0 10px 32px rgba(18, 25, 23, 0.08);
  backdrop-filter: blur(16px);
}

.brand {
  font-weight: 800;
  font-size: 18px;
  letter-spacing: 0;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(12px, 2.3vw, 28px);
  font-size: 14px;
}

.nav a {
  position: relative;
  opacity: 0.86;
}

.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: currentColor;
  transition: transform 0.2s ease;
}

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

.section {
  padding: clamp(76px, 10vw, 128px) clamp(20px, 5vw, 72px);
}

.section > * {
  max-width: var(--max);
  margin-left: auto;
  margin-right: auto;
}

.section-dark {
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(16, 26, 25, 0.98), rgba(23, 63, 53, 0.94)),
    #17211f;
}

.section-light {
  background: var(--white);
}

.section-paper {
  background:
    linear-gradient(180deg, rgba(248, 245, 238, 0.92), rgba(239, 232, 219, 0.78)),
    var(--paper);
}

.hero {
  position: relative;
  min-height: 100svh;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(320px, 0.7fr);
  align-items: stretch;
  overflow: hidden;
  padding: 0 clamp(20px, 5vw, 72px);
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 12% 20%, rgba(201, 148, 50, 0.22), transparent 26%),
    linear-gradient(90deg, rgba(17, 33, 30, 0.08), rgba(17, 33, 30, 0.72));
  pointer-events: none;
}

.hero-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 760px;
  padding: 120px 0 92px;
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.hero h1,
.section-heading h2,
.contact-inner h2 {
  margin: 0;
  line-height: 1.04;
  letter-spacing: 0;
  text-wrap: balance;
}

.hero h1 {
  max-width: 850px;
  font-size: clamp(56px, 10.5vw, 132px);
}

.hero h1 span {
  display: block;
  color: rgba(255, 255, 255, 0.56);
  font-size: clamp(28px, 4.8vw, 68px);
  margin-top: 12px;
}

.lead {
  max-width: 680px;
  margin: 28px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: clamp(18px, 2.4vw, 26px);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 38px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid currentColor;
  border-radius: var(--radius);
  font-weight: 800;
  transition:
    transform 0.2s ease,
    background 0.2s ease,
    color 0.2s ease;
}

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

.button.primary {
  color: var(--ink);
  background: var(--gold);
  border-color: var(--gold);
  box-shadow: 0 12px 30px rgba(201, 148, 50, 0.24);
}

.button.ghost {
  color: var(--white);
  background: rgba(255, 255, 255, 0.1);
}

.hero-facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  width: min(100%, 740px);
  margin: 54px 0 0;
}

.hero-facts div {
  padding-top: 16px;
  border-top: 1px solid var(--line-dark);
}

.hero-facts dt {
  color: rgba(255, 255, 255, 0.56);
  font-size: 13px;
}

.hero-facts dd {
  margin: 5px 0 0;
  font-weight: 800;
}

.hero-portrait {
  position: relative;
  z-index: 1;
  align-self: end;
  margin: 0;
  min-height: 74vh;
}

.hero-portrait img {
  width: 100%;
  height: 100%;
  min-height: 74vh;
  object-fit: cover;
  object-position: 50% 34%;
  filter: saturate(0.92) contrast(1.02);
}

.hero-strip {
  position: absolute;
  left: clamp(20px, 5vw, 72px);
  right: clamp(20px, 5vw, 72px);
  bottom: 20px;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 12px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero-strip span {
  padding: 12px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(150px, 0.32fr) minmax(0, 1fr);
  gap: clamp(18px, 5vw, 72px);
  align-items: end;
  margin-bottom: clamp(34px, 6vw, 68px);
}

.section-heading h2 {
  max-width: 980px;
  font-size: clamp(34px, 5.2vw, 70px);
  overflow-wrap: normal;
  word-break: keep-all;
}

.section-dark .section-heading h2 {
  color: var(--white);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.metric-grid article {
  min-height: 148px;
  padding: 22px 18px;
  background: var(--white);
}

.metric-grid strong {
  display: block;
  color: var(--teal);
  font-size: clamp(38px, 5vw, 58px);
  line-height: 1;
}

.metric-grid span {
  display: block;
  margin-top: 16px;
  color: var(--muted);
  font-weight: 700;
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 24px;
  border: 1px solid var(--line);
  background: var(--line);
}

.proof-strip article {
  min-height: 132px;
  padding: 24px;
  background: var(--white);
}

.proof-strip strong {
  display: block;
  color: var(--teal);
  font-size: clamp(34px, 4vw, 52px);
  line-height: 1;
}

.proof-strip span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-weight: 800;
}

.proof-strip-light article {
  background: rgba(255, 255, 255, 0.72);
}

.profile-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.62fr);
  gap: clamp(26px, 5vw, 58px);
  margin-top: clamp(38px, 6vw, 70px);
}

.intro {
  font-size: clamp(18px, 2.2vw, 24px);
}

.intro p {
  margin: 0;
}

.intro p + p {
  margin-top: 20px;
}

.identity-panel {
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--paper);
  border-radius: var(--radius);
}

.identity-panel h3,
.feature-block h3,
.role-group h3,
.paper-item h3,
.honor-item h3 {
  margin: 0;
  line-height: 1.24;
}

.identity-panel ul,
.role-group ul {
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}

.identity-panel li,
.role-group li {
  position: relative;
  padding-left: 18px;
  margin: 10px 0;
}

.identity-panel li::before,
.role-group li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--gold);
}

.timeline {
  position: relative;
}

.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 184px;
  width: 1px;
  background: var(--line);
}

.timeline-item {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 48px;
  padding: 0 0 46px;
}

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

.timeline-item time {
  color: var(--teal);
  font-weight: 900;
}

.timeline-item > div {
  position: relative;
  padding: 0 0 0 26px;
}

.timeline-item > div::before {
  content: "";
  position: absolute;
  top: 8px;
  left: -53px;
  width: 13px;
  height: 13px;
  border: 3px solid var(--paper);
  border-radius: 999px;
  background: var(--red);
  box-shadow: 0 0 0 1px var(--line);
}

.timeline-item h3 {
  margin: 0;
  font-size: clamp(22px, 3vw, 34px);
}

.timeline-item p {
  margin: 10px 0 0;
  color: var(--ink-2);
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 18px 0 0;
}

.tags li,
.status-row span,
.paper-status {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 4px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.timeline-item .note {
  color: var(--muted);
}

.research-section {
  background:
    linear-gradient(145deg, rgba(17, 33, 31, 0.98), rgba(63, 28, 22, 0.88)),
    #17211f;
}

.research-summary {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, 0.8fr);
  gap: clamp(24px, 5vw, 56px);
  align-items: start;
  color: rgba(255, 255, 255, 0.78);
  font-size: clamp(17px, 2vw, 21px);
}

.research-summary p {
  margin: 0;
}

.status-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.status-row span,
.paper-status {
  color: var(--white);
  border-color: var(--line-dark);
  background: rgba(255, 255, 255, 0.06);
}

.paper-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 42px;
}

.publication-card {
  display: grid;
  grid-template-columns: minmax(190px, 0.9fr) minmax(0, 1.1fr);
  gap: 20px;
  padding: 18px;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.06);
}

.publication-card.no-shot {
  grid-template-columns: 1fr;
}

.paper-shot {
  display: block;
  align-self: stretch;
  overflow: hidden;
  border: 1px solid var(--line-dark);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.1);
}

.paper-shot img {
  width: 100%;
  height: 100%;
  min-height: 190px;
  object-fit: cover;
  transition: transform 0.35s ease;
}

.paper-shot:hover img {
  transform: scale(1.03);
}

.publication-body h3 {
  margin: 14px 0 0;
  color: var(--white);
  font-size: clamp(18px, 2vw, 24px);
  line-height: 1.16;
}

.publication-body h3 a {
  text-decoration: underline;
  text-decoration-color: rgba(201, 148, 50, 0.65);
  text-underline-offset: 5px;
}

.publication-body p {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, 0.65);
}

.paper-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

.paper-links a {
  padding: 7px 10px;
  color: var(--ink);
  background: var(--gold);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 900;
}

.research-cases {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-bottom: 24px;
}

.research-case {
  padding: 28px;
  color: var(--white);
  background: linear-gradient(135deg, var(--green), var(--teal));
  border-radius: var(--radius);
}

.research-case span {
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
}

.research-case h3 {
  margin: 14px 0 0;
  font-size: clamp(22px, 2.5vw, 32px);
  line-height: 1.2;
}

.research-case p {
  margin: 14px 0 0;
  color: rgba(255, 255, 255, 0.78);
}

.ip-ledger {
  margin-top: 22px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.ip-ledger h3 {
  margin: 0;
  color: var(--teal);
  font-size: 28px;
}

.ip-ledger-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  margin-top: 18px;
}

.ip-ledger-grid p {
  margin: 0;
  padding: 12px 0;
  border-top: 1px solid var(--line);
  color: var(--ink-2);
}

.feature-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.feature-block {
  min-height: 220px;
  padding: 28px;
  background: var(--white);
}

.feature-block h3 {
  color: var(--teal);
  font-size: 24px;
}

.feature-block p {
  margin: 18px 0 0;
  color: var(--muted);
}

.role-board {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.role-group {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.64);
}

.role-group h3 {
  font-size: 24px;
}

.experience-list {
  display: grid;
  gap: 1px;
  margin-top: 24px;
  border: 1px solid var(--line);
  background: var(--line);
}

.experience-item {
  display: grid;
  grid-template-columns: 180px minmax(0, 0.55fr) minmax(0, 1fr);
  gap: 22px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.72);
}

.experience-item time {
  color: var(--teal);
  font-weight: 900;
}

.experience-item h3 {
  margin: 0;
  font-size: 21px;
  line-height: 1.25;
}

.experience-item p {
  margin: 0;
  color: var(--muted);
}

.honor-spotlight {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.honor-spotlight article {
  min-height: 210px;
  padding: 30px;
  background: var(--white);
}

.honor-spotlight span,
.honor-item span {
  color: var(--red);
  font-size: 13px;
  font-weight: 900;
}

.honor-spotlight strong {
  display: block;
  margin-top: 14px;
  color: var(--teal);
  font-size: clamp(26px, 3vw, 42px);
  line-height: 1.12;
}

.honor-spotlight p {
  margin: 18px 0 0;
  color: var(--muted);
}

.achievement-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-top: 22px;
}

.achievement-block {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.achievement-block h3,
.work-list h3 {
  margin: 0;
  color: var(--teal);
  font-size: clamp(22px, 2.4vw, 30px);
}

.achievement-block ul,
.work-list ul {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
}

.achievement-block li,
.work-list li {
  position: relative;
  margin: 12px 0;
  padding-left: 18px;
  color: var(--ink-2);
}

.achievement-block li::before,
.work-list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: var(--gold);
}

.cert-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.cert-strip span {
  padding: 10px 12px;
  color: var(--teal);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 900;
}

.honor-item h3 {
  margin-top: 12px;
  font-size: clamp(20px, 2.5vw, 28px);
}

.honor-item p {
  margin: 14px 0 0;
  color: var(--muted);
}

.literature-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.78fr) minmax(320px, 1fr);
  gap: clamp(28px, 6vw, 74px);
  align-items: start;
}

.literature-copy {
  font-size: clamp(18px, 2.3vw, 25px);
}

.literature-copy p {
  margin: 0;
}

.literature-copy p + p {
  margin-top: 20px;
}

.work-list {
  padding: 32px;
  border-left: 4px solid var(--gold);
  background: rgba(255, 255, 255, 0.68);
  border-radius: var(--radius);
}

.literary-showcase {
  padding: clamp(28px, 4vw, 44px);
  border: 2px solid #e6b22e;
  border-radius: 16px;
  background: linear-gradient(180deg, #fff9e7, #fff2c7);
}

.literary-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 26px;
}

.literary-header strong {
  display: block;
  color: #d9a323;
  font-size: clamp(56px, 8vw, 76px);
  line-height: 0.95;
}

.literary-header span {
  display: block;
  margin-top: 8px;
  color: var(--ink-2);
  font-weight: 900;
}

.literary-header p {
  max-width: 430px;
  margin: 0;
  color: var(--ink-2);
  font-size: 19px;
  text-align: right;
}

.literary-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.literary-grid article {
  min-height: 100px;
  padding: 20px 16px;
  text-align: center;
  border: 1px solid rgba(201, 148, 50, 0.25);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: 0 10px 24px rgba(108, 80, 25, 0.1);
}

.literary-grid h3 {
  margin: 0;
  font-size: 17px;
  line-height: 1.25;
}

.literary-grid span {
  display: inline-flex;
  margin-top: 12px;
  padding: 5px 11px;
  color: #a45b06;
  background: #ffedb3;
  border-radius: 999px;
  font-weight: 900;
}

.literary-footer {
  margin: 28px 0 0;
  color: var(--ink-2);
  font-weight: 800;
  text-align: center;
}

.cert-grid-pro {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.cert-grid-pro article {
  min-height: 190px;
  padding: 26px 22px;
  text-align: center;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: var(--white);
  box-shadow: 0 12px 32px rgba(23, 33, 31, 0.06);
}

.cert-grid-pro span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 60px;
  min-height: 60px;
  padding: 0 10px;
  color: var(--teal);
  background: var(--paper);
  border-radius: 999px;
  font-size: 12px;
  font-weight: 900;
}

.cert-grid-pro h3 {
  margin: 20px 0 0;
  font-size: 20px;
  line-height: 1.25;
}

.cert-grid-pro p {
  margin: 12px 0 0;
  color: var(--teal);
  font-weight: 800;
}

.cert-grid-pro .wide-cert {
  grid-column: span 2;
}

.gallery-section {
  background:
    linear-gradient(145deg, rgba(26, 32, 30, 0.98), rgba(30, 55, 47, 0.92)),
    #1a201e;
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.gallery-grid figure {
  position: relative;
  min-height: 320px;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
}

.gallery-grid figure.wide {
  grid-column: span 2;
}

.gallery-grid img {
  width: 100%;
  height: 100%;
  min-height: 320px;
  object-fit: cover;
  transition: transform 0.55s ease;
}

.gallery-grid figure:hover img {
  transform: scale(1.04);
}

.gallery-grid figcaption {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 7px 10px;
  color: var(--white);
  background: rgba(20, 24, 23, 0.72);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 800;
}

.section-contact {
  color: var(--white);
  background:
    linear-gradient(135deg, rgba(181, 74, 58, 0.9), rgba(12, 124, 114, 0.92)),
    #0c7c72;
}

.contact-inner {
  max-width: 1060px;
  margin: 0 auto;
}

.contact-inner h2 {
  text-align: center;
  font-size: clamp(34px, 6vw, 68px);
}

.contact-inner p:not(.eyebrow) {
  max-width: 720px;
  margin: 0;
  color: rgba(255, 255, 255, 0.82);
}

.contact-inner .eyebrow {
  text-align: center;
}

.contact-card {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: clamp(24px, 5vw, 54px);
  align-items: center;
  margin-top: 36px;
}

.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.contact-links a {
  padding: 12px 16px;
  color: var(--ink);
  background: var(--white);
  border-radius: var(--radius);
  font-weight: 900;
}

.wechat-card {
  margin: 0;
  padding: 14px;
  color: var(--ink);
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.wechat-card img {
  width: 100%;
  border-radius: 4px;
}

.wechat-card figcaption {
  margin-top: 10px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
  text-align: center;
}

html.js .reveal {
  opacity: 1;
  transform: none;
  transition:
    opacity 0.65s ease,
    transform 0.65s ease;
}

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

@media (max-width: 980px) {
  .site-header {
    align-items: flex-start;
  }

  .nav {
    max-width: 420px;
    justify-content: flex-end;
    flex-wrap: wrap;
    gap: 10px 16px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .hero-copy {
    padding-top: 112px;
    padding-bottom: 30px;
  }

  .hero-portrait {
    min-height: auto;
    max-width: 620px;
    justify-self: center;
  }

  .hero-portrait img {
    min-height: 480px;
  }

  .hero-strip {
    position: relative;
    left: auto;
    right: auto;
    bottom: auto;
    grid-column: 1;
    margin-bottom: 22px;
  }

  .section-heading,
  .research-summary,
  .profile-layout {
    grid-template-columns: 1fr;
  }

  .metric-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .feature-columns,
  .role-board,
  .honor-spotlight,
  .achievement-columns,
  .paper-card-grid,
  .research-cases,
  .ip-ledger-grid,
  .literary-grid,
  .cert-grid-pro {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .paper-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .gallery-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .site-header {
    position: absolute;
    padding: 16px 18px;
  }

  .site-header.is-scrolled {
    position: fixed;
  }

  .brand {
    font-size: 17px;
  }

  .nav {
    display: none;
  }

  .section {
    padding: 66px 18px;
  }

  .hero {
    padding: 0 18px;
  }

  .hero-copy {
    padding-top: 86px;
    padding-bottom: 22px;
  }

  .hero h1 {
    font-size: 48px;
  }

  .hero h1 span {
    font-size: 25px;
  }

  .lead {
    font-size: 17px;
    line-height: 1.58;
    margin-top: 22px;
  }

  .hero-actions {
    gap: 10px;
    margin-top: 28px;
  }

  .button {
    min-height: 46px;
    padding: 0 18px;
  }

  .hero-facts,
  .metric-grid,
  .proof-strip,
  .feature-columns,
  .role-board,
  .honor-spotlight,
  .achievement-columns,
  .paper-card-grid,
  .research-cases,
  .ip-ledger-grid,
  .literary-grid,
  .cert-grid-pro,
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .hero-strip {
    display: none;
  }

  .hero-portrait img {
    min-height: 330px;
  }

  .metric-grid article {
    min-height: 122px;
  }

  .timeline::before {
    left: 0;
  }

  .timeline-item {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-left: 22px;
  }

  .timeline-item > div {
    padding-left: 0;
  }

  .timeline-item > div::before {
    left: -28px;
  }

  .publication-card,
  .experience-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .gallery-grid figure.wide {
    grid-column: auto;
  }

  .literature-layout,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .literary-header {
    display: block;
  }

  .literary-header p {
    margin-top: 18px;
    text-align: left;
  }

  .cert-grid-pro .wide-cert {
    grid-column: auto;
  }

  .work-list {
    padding: 24px;
  }

  .wechat-card {
    width: min(100%, 260px);
    justify-self: center;
  }

  .contact-links {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
    animation: none !important;
  }

  html.js .reveal {
    opacity: 1;
    transform: none;
  }
}