:root {
  --ink: #18222e;
  --muted: #5f6874;
  --paper: #f6f1e8;
  --paper-deep: #ebe2d2;
  --quote-bg: #18222e;
  --quote-bg-progress: 0;
  --panel: rgba(255, 252, 246, 0.82);
  --line: rgba(24, 34, 46, 0.14);
  --accent: #9d2f2f;
  --accent-dark: #6f2020;
  --gold: #b38a4b;
  --shadow: 0 24px 70px rgba(24, 34, 46, 0.12);
  font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  position: relative;
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 80% 8%, rgba(157, 47, 47, 0.12), transparent 28rem),
    linear-gradient(115deg, rgba(179, 138, 75, 0.12) 0 1px, transparent 1px 100%),
    var(--paper);
  background-size: auto, 36px 36px, auto;
  line-height: 1.7;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: 0;
  background: var(--quote-bg);
  content: "";
  opacity: var(--quote-bg-progress);
  pointer-events: none;
}

body > * {
  position: relative;
  z-index: 1;
}

@keyframes home-reveal {
  from {
    opacity: 0;
    filter: blur(16px);
    transform: translateY(34px) scale(0.985);
  }

  to {
    opacity: 1;
    filter: blur(0);
    transform: translateY(0) scale(1);
  }
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 5vw, 72px);
  border-bottom: 1px solid var(--line);
  background: rgba(246, 241, 232, 0.86);
  backdrop-filter: blur(18px);
  animation: home-reveal 780ms cubic-bezier(0.16, 1, 0.3, 1) 80ms both;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand-mark {
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid rgba(157, 47, 47, 0.45);
  border-radius: 50%;
  color: var(--accent);
  font-family: "Noto Serif SC", serif;
  font-size: 22px;
  font-weight: 900;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-family: "Noto Serif SC", serif;
  font-size: 18px;
  letter-spacing: 0.06em;
}

.brand small {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  color: var(--muted);
  font-size: 14px;
}

.site-nav a {
  transition: color 180ms ease;
}

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

.section-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  gap: clamp(28px, 6vw, 72px);
  align-items: center;
  min-height: calc(100vh - 82px);
  padding: 78px 0;
}

.hero .eyebrow,
.hero h1,
.hero-lede,
.hero-actions,
.hero-card {
  animation: home-reveal 980ms cubic-bezier(0.16, 1, 0.3, 1) both;
}

.hero .eyebrow {
  animation-delay: 180ms;
}

.hero h1 {
  animation-delay: 260ms;
}

.hero-lede {
  animation-delay: 360ms;
}

.hero-actions {
  animation-delay: 460ms;
}

.hero-card {
  animation-delay: 520ms;
}

.eyebrow,
.section-kicker {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

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

h1,
h2,
h3 {
  font-family: "Noto Serif SC", serif;
  line-height: 1.18;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(54px, 10vw, 112px);
  letter-spacing: -0.08em;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(32px, 5vw, 56px);
  letter-spacing: -0.04em;
}

h3 {
  margin-bottom: 12px;
  font-size: 22px;
}

.hero-lede {
  max-width: 660px;
  margin-bottom: 34px;
  color: #384454;
  font-size: clamp(18px, 2.3vw, 24px);
}

.hero-actions,
.closing {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-weight: 700;
  transition:
    transform 180ms ease,
    box-shadow 180ms ease,
    background-color 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 14px 26px rgba(24, 34, 46, 0.12);
}

.button.primary {
  border-color: var(--accent);
  color: #fffaf3;
  background: var(--accent);
}

.button.primary:hover {
  background: var(--accent-dark);
}

.button.secondary {
  background: rgba(255, 252, 246, 0.68);
}

.hero-card {
  position: relative;
  padding: clamp(26px, 4vw, 42px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-card::before {
  position: absolute;
  top: 20px;
  right: -22px;
  width: 128px;
  height: 128px;
  border: 2px solid rgba(157, 47, 47, 0.24);
  border-radius: 50%;
  content: "";
}

.hero-card > p {
  color: var(--accent);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.hero-card h2 {
  max-width: 320px;
  font-size: clamp(30px, 4vw, 44px);
}

dl {
  display: grid;
  gap: 18px;
  margin: 36px 0 0;
}

dt {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

dd {
  margin: 3px 0 0;
  font-family: "Noto Serif SC", serif;
  font-size: 18px;
}

.intro-band {
  padding: 88px 0;
  border-block: 1px solid var(--line);
  background: rgba(24, 34, 46, 0.05);
}

.intro-overview {
  margin-bottom: 38px;
}

.intro-overview h2 {
  margin-bottom: 0;
}

.intro-grid {
  display: grid;
  grid-template-columns: 0.86fr 1.14fr;
  gap: 24px;
  align-items: stretch;
}

.intro-panel {
  padding: clamp(24px, 4vw, 36px);
  border: 1px solid var(--line);
  border-radius: 28px;
  background: rgba(255, 252, 246, 0.58);
}

.intro-title {
  margin-bottom: 18px;
  font-size: clamp(28px, 4vw, 44px);
  letter-spacing: -0.04em;
}

.intro-copy p:not(.section-kicker) {
  margin-bottom: 0;
  color: #303b49;
  font-size: 18px;
}

.intro-members .member-grid {
  margin-top: 28px;
}

.intro-research {
  margin-top: 24px;
}

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

.intro-reveal {
  opacity: 0;
  filter: blur(18px);
  transform: translateY(42px) scale(0.985);
  transition:
    opacity 900ms cubic-bezier(0.16, 1, 0.3, 1),
    filter 900ms cubic-bezier(0.16, 1, 0.3, 1),
    transform 900ms cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: var(--reveal-delay, 0ms);
  will-change: opacity, filter, transform;
}

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

.member-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
  margin: 32px 0 0;
  padding: 0;
  list-style: none;
}

.member-grid li {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255, 252, 246, 0.54);
  font-size: 18px;
  font-weight: 700;
  outline: none;
}

.member-name {
  flex: 1;
  text-align: center;
}

.member-bio {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  z-index: 10;
  width: max-content;
  max-width: min(260px, 76vw);
  padding: 14px 16px;
  border: 1px solid rgba(24, 34, 46, 0.16);
  border-radius: 16px;
  color: #303b49;
  background: rgba(255, 252, 246, 0.96);
  box-shadow: 0 18px 42px rgba(24, 34, 46, 0.16);
  font-size: 14px;
  font-weight: 500;
  line-height: 1.65;
  opacity: 0;
  pointer-events: none;
  transform: translate(-50%, -4px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.member-grid li:hover,
.member-grid li:focus-visible {
  border-color: rgba(157, 47, 47, 0.34);
  background: rgba(255, 252, 246, 0.74);
}

.member-grid li:hover .member-bio,
.member-grid li:focus-visible .member-bio {
  opacity: 1;
  transform: translate(-50%, 0);
}

.member-avatar {
  display: grid;
  flex: 0 0 auto;
  width: 62px;
  height: 62px;
  place-items: center;
  border: 1px solid rgba(157, 47, 47, 0.28);
  border-radius: 50%;
  color: var(--accent);
  background: rgba(255, 252, 246, 0.78);
  font-family: "Noto Serif SC", serif;
  font-size: 24px;
  font-weight: 900;
}

img.member-avatar {
  display: block;
  object-fit: cover;
}

.activities,
.closing {
  padding: 104px 0;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 46px;
}

.section-heading > p:last-child {
  color: var(--muted);
  font-size: 18px;
}

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

.research-card {
  min-height: 310px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 252, 246, 0.64);
}

.research-card span {
  display: inline-block;
  margin-bottom: 34px;
  color: var(--gold);
  font-family: "Noto Serif SC", serif;
  font-size: 34px;
  font-weight: 900;
}

.research-card p,
.activity-list p,
.closing p,
.site-footer {
  color: var(--muted);
}

.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  padding: 1px;
  border-radius: 28px;
  background: var(--line);
  overflow: hidden;
}

.metric {
  min-height: 190px;
  padding: 28px;
  background: rgba(255, 252, 246, 0.72);
}

.metric strong {
  display: block;
  margin-bottom: 20px;
  color: var(--accent);
  font-family: "Noto Serif SC", serif;
  font-size: clamp(42px, 7vw, 72px);
  line-height: 1;
}

.metric span {
  display: block;
  max-width: 180px;
  color: #374252;
  font-weight: 700;
}

.activity-list {
  display: grid;
  gap: 16px;
}

.activity-list article {
  display: grid;
  grid-template-columns: 170px minmax(0, 1fr);
  gap: 28px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 24px;
  background: rgba(255, 252, 246, 0.66);
}

.activity-date {
  color: var(--accent);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.quote-section {
  display: grid;
  min-height: 78vh;
  padding: clamp(150px, 22vh, 240px) 20px;
  place-items: center;
  color: #fffaf3;
}

blockquote {
  width: min(920px, 100%);
  margin: 0 auto;
  text-align: center;
}

blockquote p {
  margin-bottom: 18px;
  font-family: "Noto Serif SC", serif;
  font-size: clamp(34px, 6vw, 68px);
  font-weight: 900;
  line-height: 1.2;
}

cite {
  color: rgba(255, 250, 243, 0.68);
  font-style: normal;
}

.closing {
  flex-direction: column;
  align-items: flex-start;
  max-width: 860px;
}

.closing p {
  max-width: 720px;
  font-size: 19px;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 24px;
  padding: 28px clamp(20px, 5vw, 72px);
  border-top: 1px solid var(--line);
  font-size: 14px;
}

.site-footer p {
  margin: 0;
}

@media (max-width: 920px) {
  .site-header {
    align-items: flex-start;
    flex-direction: column;
  }

  .hero,
  .intro-grid {
    grid-template-columns: 1fr;
  }

  .hero {
    min-height: auto;
  }

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

@media (max-width: 640px) {
  .section-shell {
    width: min(100% - 28px, 1120px);
  }

  .site-header {
    padding: 14px;
  }

  .site-nav {
    gap: 6px 14px;
    font-size: 13px;
  }

  h1 {
    letter-spacing: -0.06em;
  }

  .hero,
  .activities,
  .closing {
    padding: 64px 0;
  }

  .intro-research {
    margin-top: 18px;
  }

  .research-grid,
  .metrics,
  .member-grid,
  .activity-list article {
    grid-template-columns: 1fr;
  }

  .research-card {
    min-height: auto;
  }

  .metric {
    min-height: auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header,
  .hero .eyebrow,
  .hero h1,
  .hero-lede,
  .hero-actions,
  .hero-card {
    animation: none;
  }

  .intro-reveal {
    opacity: 1;
    filter: none;
    transform: none;
    transition: none;
  }
}