/* =========================================================
   高性能弹性体复合材料课题组 · 站点样式
   Design system: ink / paper / teal / lime
   ========================================================= */

:root {
  --ink: #071018;
  --ink-2: #0b1823;
  --ink-3: #112534;
  --paper: #f4f1e9;
  --paper-2: #faf8f2;
  --white: #ffffff;
  --text: #17222c;
  --muted: #68727c;
  --muted-2: #8b949c;
  --line: rgba(13, 27, 39, 0.12);
  --line-dark: rgba(255, 255, 255, 0.14);
  --teal: #14b8a6;
  --teal-deep: #0b8f84;
  --teal-soft: #d7f2ee;
  --blue: #2e5bff;
  --lime: #d8f36b;
  --copper: #dd8a52;
  --serif: "Noto Serif SC", "Source Han Serif SC", "Songti SC", "STSong", "SimSun", Georgia, serif;
  --sans: "Inter", "HarmonyOS Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  --mono: "JetBrains Mono", "Cascadia Code", "SFMono-Regular", Consolas, monospace;
  --radius: 22px;
  --radius-sm: 14px;
  --shadow: 0 24px 60px -30px rgba(7, 16, 24, 0.28);
  --shadow-strong: 0 40px 90px -40px rgba(7, 16, 24, 0.45);
  --header-h: 112px;
  --ease: cubic-bezier(0.22, 0.8, 0.24, 1);
  --max: 1240px;
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  background: var(--paper);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.is-locked { overflow: hidden; }

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button, input, select { font: inherit; color: inherit; }
button { cursor: pointer; background: none; border: 0; padding: 0; }
ul, ol { margin: 0; padding: 0; list-style: none; }
figure { margin: 0; }
::selection { background: var(--teal); color: #04110f; }

:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed;
  left: 16px;
  top: -80px;
  z-index: 999;
  background: var(--lime);
  color: var(--ink);
  padding: 10px 18px;
  border-radius: 999px;
  font-weight: 700;
  transition: top 0.2s;
}
.skip-link:focus { top: 16px; }

/* ---------- layout ---------- */
.container {
  width: min(var(--max), calc(100% - 56px));
  margin-inline: auto;
}
.section { padding: clamp(70px, 8.5vw, 126px) 0; position: relative; }
.section--tight { padding: clamp(48px, 5vw, 72px) 0; }
.section--paper { background: var(--paper); }
.section--paper2 { background: var(--paper-2); }
.section--white { background: var(--white); }
.section--dark { background: var(--ink); color: #edf2f3; }
.section--dark .lead { color: rgba(237, 242, 243, 0.66); }
.section--ink2 { background: var(--ink-2); color: #edf2f3; }

.section-topline {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid var(--line);
  padding-top: 18px;
  margin-bottom: clamp(34px, 4vw, 56px);
}
.section--dark .section-topline { border-color: var(--line-dark); }

.eyebrow {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--teal-deep);
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 600;
}
.eyebrow::before {
  content: "";
  width: 30px;
  height: 1px;
  background: currentColor;
  flex: none;
}
.section--dark .eyebrow { color: var(--lime); }

.section-index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted-2);
}
.section--dark .section-index { color: rgba(255, 255, 255, 0.42); }

.h2 {
  font-family: var(--serif);
  font-size: clamp(30px, 3.6vw, 50px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin: 14px 0 0;
  text-wrap: balance;
}
.h2 em { font-style: normal; color: var(--teal-deep); }
.section--dark .h2 em { color: var(--lime); }

.h3 {
  font-family: var(--serif);
  font-size: clamp(22px, 2.4vw, 32px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin: 0;
}

.lead {
  font-size: clamp(15.5px, 1.35vw, 18px);
  line-height: 1.95;
  color: var(--muted);
  max-width: 66ch;
}
.lead p { margin: 0 0 1em; }
.lead p:last-child { margin-bottom: 0; }

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin-bottom: clamp(36px, 4.6vw, 64px);
}
.section-head .h2 { max-width: 760px; }
.section-head-side { flex: none; max-width: 360px; }
.section-head-side p { margin: 0; color: var(--muted); font-size: 14.5px; }
.section--dark .section-head-side p { color: rgba(255, 255, 255, 0.6); }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: transform 0.25s var(--ease), background 0.25s, color 0.25s, border-color 0.25s;
  white-space: nowrap;
}
.btn svg { width: 16px; height: 16px; flex: none; }
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--teal); color: #04110f; }
.btn-primary:hover { background: #26cdb9; }
.btn-lime { background: var(--lime); color: var(--ink); }
.btn-lime:hover { background: #e6ff85; }
.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.28);
  color: #fff;
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.1); border-color: rgba(255, 255, 255, 0.5); }
.btn-outline {
  border: 1px solid var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, 0.5);
}
.btn-outline:hover { border-color: var(--text); background: #fff; }
.btn-sm { min-height: 40px; padding: 0 18px; font-size: 13px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--teal-deep);
  transition: gap 0.25s var(--ease), color 0.2s;
}
.link-arrow svg { width: 15px; height: 15px; transition: transform 0.25s var(--ease); }
.link-arrow:hover { gap: 12px; }
.link-arrow:hover svg { transform: translateX(2px); }
.section--dark .link-arrow { color: var(--lime); }

/* =========================================================
   header
   ========================================================= */
.progress-bar {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--teal), var(--lime));
  z-index: 200;
  pointer-events: none;
}

.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 120;
  background: rgba(7, 16, 24, 0.94);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #fff;
  transition: box-shadow 0.3s, background 0.3s;
}
.site-header.is-scrolled { box-shadow: 0 18px 40px -24px rgba(0, 0, 0, 0.6); }

.topbar {
  border-bottom: 1px solid rgba(255, 255, 255, 0.07);
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.52);
  height: 34px;
  overflow: hidden;
  transition: height 0.3s var(--ease), opacity 0.3s;
}
.site-header.is-scrolled .topbar { height: 0; opacity: 0; border-color: transparent; }
.topbar-inner {
  height: 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}
.topbar-left { display: flex; align-items: center; gap: 10px; letter-spacing: 0.05em; }
.topbar-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal); box-shadow: 0 0 0 3px rgba(20, 184, 166, 0.18); }
.topbar-right { display: flex; align-items: center; gap: 22px; }
.topbar-right a { transition: color 0.2s; }
.topbar-right a:hover { color: #fff; }

.navbar {
  height: 78px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  transition: height 0.3s var(--ease);
}
.site-header.is-scrolled .navbar { height: 68px; }

.brand { display: flex; align-items: center; gap: 13px; min-width: 0; }
.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  display: grid;
  place-items: center;
  overflow: hidden;
  flex: none;
}
.brand-mark img { width: 100%; height: 100%; object-fit: contain; padding: 5px; }
.brand-text { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.brand-name {
  font-family: var(--serif);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.brand-en {
  font-family: var(--mono);
  font-size: 8.5px;
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.46);
  white-space: nowrap;
}

.nav { display: flex; align-items: center; gap: 4px; }
.nav a {
  position: relative;
  display: block;
  padding: 9px 12px;
  font-size: 13.5px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.7);
  border-radius: 8px;
  transition: color 0.2s, background 0.2s;
  white-space: nowrap;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 1px;
  background: var(--teal);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav a:hover { color: #fff; }
.nav a:hover::after, .nav a.is-active::after { transform: scaleX(1); }
.nav a.is-active { color: #fff; }

.nav-actions { display: flex; align-items: center; gap: 10px; flex: none; }
.nav-actions .btn { min-height: 42px; padding: 0 18px; font-size: 13px; }

.burger {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  position: relative;
}
.burger span {
  position: absolute;
  left: 12px;
  right: 12px;
  height: 1.5px;
  background: #fff;
  transition: transform 0.3s var(--ease), opacity 0.2s;
}
.burger span:nth-child(1) { top: 16px; }
.burger span:nth-child(2) { top: 22px; }
.burger span:nth-child(3) { top: 28px; }
body.menu-open .burger span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
body.menu-open .burger span:nth-child(2) { opacity: 0; }
body.menu-open .burger span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }

.mobile-menu {
  position: fixed;
  inset: 0;
  z-index: 110;
  background: var(--ink);
  color: #fff;
  padding: calc(var(--header-h) + 26px) 28px 36px;
  display: none;
  flex-direction: column;
  overflow-y: auto;
}
body.menu-open .mobile-menu { display: flex; }
.mobile-nav { display: flex; flex-direction: column; margin-top: 6px; }
.mobile-nav a {
  font-family: var(--serif);
  font-size: clamp(26px, 7vw, 36px);
  font-weight: 700;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.mobile-nav a span {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--teal);
  letter-spacing: 0.1em;
}
.mobile-menu-foot {
  margin-top: auto;
  padding-top: 30px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12.5px;
  line-height: 2;
}
.mobile-menu-foot a { color: #fff; }

/* =========================================================
   home hero
   ========================================================= */
.hero {
  position: relative;
  background: var(--ink);
  color: #f2f5f4;
  padding-top: var(--header-h);
  overflow: hidden;
  isolation: isolate;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(900px 520px at 78% 18%, rgba(20, 184, 166, 0.18), transparent 65%),
    radial-gradient(700px 500px at 8% 80%, rgba(46, 91, 255, 0.13), transparent 60%);
  z-index: -1;
}
.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.5'/%3E%3C/svg%3E");
  opacity: 0.035;
  z-index: -1;
  pointer-events: none;
}
#meshCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  opacity: 0.55;
}
.hero-inner {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: clamp(36px, 5vw, 76px);
  align-items: center;
  padding: clamp(58px, 7vw, 96px) 0 clamp(52px, 6vw, 78px);
  min-height: min(720px, calc(100svh - var(--header-h)));
}
.hero-copy { max-width: 680px; }
.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 13px 7px 9px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: rgba(255, 255, 255, 0.72);
  background: rgba(255, 255, 255, 0.035);
}
.hero-eyebrow .pulse {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--lime);
  box-shadow: 0 0 0 4px rgba(216, 243, 107, 0.12);
  animation: pulse 2.6s infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px rgba(216, 243, 107, 0.12); }
  50% { box-shadow: 0 0 0 8px rgba(216, 243, 107, 0.04); }
}
.hero h1 {
  font-family: var(--serif);
  font-size: clamp(46px, 6.2vw, 84px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  font-weight: 800;
  margin: 26px 0 0;
  text-wrap: balance;
}
.hero h1 .line { display: block; }
.hero h1 .accent {
  background: linear-gradient(92deg, #7ff0e0 0%, var(--teal) 42%, var(--lime) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin: 24px 0 0;
  font-size: clamp(15px, 1.35vw, 17.5px);
  line-height: 1.95;
  color: rgba(237, 242, 243, 0.66);
  max-width: 560px;
}
.hero-cta { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
  margin-top: 34px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.38);
}
.hero-meta span { display: inline-flex; align-items: center; gap: 8px; }
.hero-meta span::before { content: ""; width: 4px; height: 4px; background: var(--teal); border-radius: 50%; }

.hero-visual { position: relative; }
.hero-frame {
  position: relative;
  border-radius: 28px;
  padding: 10px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.045);
  backdrop-filter: blur(10px);
  transform: rotate(1.2deg);
  box-shadow: 0 50px 100px -50px rgba(0, 0, 0, 0.8);
  transition: transform 0.7s var(--ease);
}
.hero-frame:hover { transform: rotate(0deg) translateY(-4px); }
.hero-frame-img {
  border-radius: 20px;
  overflow: hidden;
  aspect-ratio: 4 / 3;
  background: var(--ink-3);
}
.hero-frame-img img { width: 100%; height: 100%; object-fit: cover; }
.hero-frame-cap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 8px 2px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
}
.hero-frame-cap b { color: rgba(255, 255, 255, 0.8); font-weight: 500; }

.hero-float {
  position: absolute;
  left: -30px;
  bottom: 56px;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 20px;
  border-radius: 18px;
  background: rgba(9, 20, 29, 0.86);
  border: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(16px);
  box-shadow: var(--shadow-strong);
  animation: floaty 7s ease-in-out infinite;
}
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-9px); }
}
.hero-float .num {
  font-family: var(--serif);
  font-size: 34px;
  line-height: 1;
  color: var(--lime);
}
.hero-float .txt { font-size: 11px; line-height: 1.5; color: rgba(255, 255, 255, 0.58); }
.hero-float .txt b { display: block; color: #fff; font-size: 12.5px; font-weight: 600; }

.hero-badge {
  position: absolute;
  right: -26px;
  top: -26px;
  width: 108px;
  height: 108px;
  border-radius: 50%;
  background: rgba(7, 16, 24, 0.75);
  border: 1px solid rgba(255, 255, 255, 0.18);
  backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
}
.hero-badge svg { position: absolute; inset: 6px; width: calc(100% - 12px); height: calc(100% - 12px); animation: spin 22s linear infinite; }
.hero-badge text {
  font-family: var(--mono);
  font-size: 8.2px;
  letter-spacing: 0.22em;
  fill: rgba(255, 255, 255, 0.62);
  text-transform: uppercase;
}
.hero-badge .core {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: var(--lime);
  color: var(--ink);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 11px;
  letter-spacing: 0.02em;
}
@keyframes spin { to { transform: rotate(360deg); } }

.hero-stats {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  padding: 30px 0 34px;
  position: relative;
  z-index: 2;
}
.hero-stat .v {
  font-family: var(--serif);
  font-size: clamp(27px, 3.1vw, 42px);
  line-height: 1;
  letter-spacing: -0.02em;
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.hero-stat .v small { font-family: var(--sans); font-size: 12px; color: var(--teal); letter-spacing: 0; }
.hero-stat .k {
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
  font-family: var(--mono);
}

.scroll-hint {
  position: absolute;
  right: 22px;
  bottom: 120px;
  writing-mode: vertical-rl;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.3);
  display: flex;
  align-items: center;
  gap: 12px;
}
.scroll-hint::after {
  content: "";
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--teal), transparent);
}

/* ---------- marquee ---------- */
.marquee {
  background: var(--ink-2);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  overflow: hidden;
  padding: 18px 0;
}
.marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 38s linear infinite;
}
.marquee:hover .marquee-track { animation-play-state: paused; }
.marquee-track span {
  display: inline-flex;
  align-items: center;
  gap: 26px;
  padding-right: 26px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.38);
  white-space: nowrap;
}
.marquee-track span::after { content: "◆"; color: var(--teal); font-size: 7px; }
@keyframes marquee { to { transform: translateX(-50%); } }

/* =========================================================
   home sections
   ========================================================= */
.about-grid {
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  gap: clamp(40px, 6vw, 90px);
  align-items: start;
}
.about-statement .h2 { max-width: 520px; }
.about-statement .lead { margin-top: 28px; }
.about-side { padding-top: 10px; }
.about-paras p {
  margin: 0 0 1.2em;
  font-size: 15.5px;
  line-height: 1.95;
  color: var(--muted);
}
.about-paras p:last-child { margin-bottom: 0; }
.about-mini-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: 18px;
  overflow: hidden;
  margin-top: 32px;
}
.about-mini-stats div { background: var(--paper-2); padding: 20px 22px; }
.about-mini-stats b {
  display: block;
  font-family: var(--serif);
  font-size: 28px;
  line-height: 1;
  letter-spacing: -0.02em;
}
.about-mini-stats span { display: block; margin-top: 8px; font-size: 11.5px; color: var(--muted); letter-spacing: 0.04em; }

.leader-strip {
  margin-top: clamp(48px, 6vw, 78px);
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper-2);
}
.leader-strip-photo { aspect-ratio: 4 / 5; overflow: hidden; background: #e7e4db; }
.leader-strip-photo img { width: 100%; height: 100%; object-fit: cover; }
.leader-strip-body { padding: clamp(26px, 4vw, 46px); display: flex; flex-direction: column; justify-content: center; }
.leader-strip-body .role { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal-deep); }
.leader-strip-body h3 { font-family: var(--serif); font-size: clamp(26px, 3vw, 36px); margin: 10px 0 4px; }
.leader-strip-body .tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 20px; }
.leader-strip-body .tags span {
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 999px;
  background: rgba(20, 184, 166, 0.09);
  color: var(--teal-deep);
  border: 1px solid rgba(20, 184, 166, 0.18);
}
.leader-strip-body p { margin: 0 0 20px; color: var(--muted); font-size: 14px; line-height: 1.9; }

.research-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.research-card {
  position: relative;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.4s var(--ease), box-shadow 0.4s, border-color 0.3s;
}
.research-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: rgba(20, 184, 166, 0.35); }
.research-card-img {
  aspect-ratio: 16 / 8.6;
  overflow: hidden;
  background: #e9eeeb;
  position: relative;
}
.research-card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease); }
.research-card:hover .research-card-img img { transform: scale(1.045); }
.research-card-img::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(7, 16, 24, 0.18), transparent 60%);
}
.research-card-num {
  position: absolute;
  left: 20px;
  top: 18px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  color: #fff;
  background: rgba(7, 16, 24, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 5px 9px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}
.research-card-body { padding: 26px 28px 28px; display: flex; flex-direction: column; flex: 1; }
.research-card-body h3 { font-family: var(--serif); font-size: 22px; margin: 0 0 12px; letter-spacing: -0.01em; }
.research-card-body p { margin: 0 0 22px; color: var(--muted); font-size: 13.5px; line-height: 1.85; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.research-card-body .link-arrow { margin-top: auto; }

.highlights-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.highlight-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 20px;
  overflow: hidden;
  cursor: pointer;
  transition: transform 0.4s var(--ease), box-shadow 0.4s;
  display: flex;
  flex-direction: column;
  text-align: left;
}
.highlight-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.highlight-img { aspect-ratio: 16 / 10; overflow: hidden; background: #eef1ee; position: relative; }
.highlight-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s var(--ease); }
.highlight-card:hover .highlight-img img { transform: scale(1.05); }
.highlight-img .tag {
  position: absolute;
  left: 14px;
  top: 14px;
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  background: rgba(7, 16, 24, 0.62);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.18);
  padding: 4px 8px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}
.highlight-body { padding: 22px 24px 24px; display: flex; flex-direction: column; flex: 1; }
.highlight-body h3 { font-family: var(--serif); font-size: 19px; line-height: 1.45; margin: 0 0 10px; }
.highlight-body p { margin: 0; color: var(--muted); font-size: 13px; line-height: 1.8; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.highlight-more { margin-top: 18px; font-size: 12px; font-weight: 600; color: var(--teal-deep); display: flex; align-items: center; gap: 6px; }
.highlight-more svg { width: 13px; height: 13px; }

.news-home-grid {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: clamp(30px, 4vw, 58px);
  align-items: start;
}
.news-feature {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
  color: #fff;
  min-height: 430px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 34px;
  isolation: isolate;
}
.news-feature img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform 0.9s var(--ease); }
.news-feature:hover img { transform: scale(1.04); }
.news-feature::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(4, 10, 15, 0.92) 0%, rgba(4, 10, 15, 0.35) 55%, rgba(4, 10, 15, 0.1) 100%);
  z-index: -1;
}
.news-feature .tag {
  align-self: flex-start;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  background: var(--lime);
  color: var(--ink);
  padding: 5px 10px;
  border-radius: 999px;
  margin-bottom: 16px;
}
.news-feature h3 { font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px); line-height: 1.4; margin: 0 0 14px; }
.news-feature .meta { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.1em; color: rgba(255, 255, 255, 0.55); }
.news-feature p { margin: 12px 0 0; color: rgba(255, 255, 255, 0.66); font-size: 13.5px; line-height: 1.8; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

.news-list { display: flex; flex-direction: column; border-top: 1px solid var(--line); }
.news-row {
  display: grid;
  grid-template-columns: 86px 1fr 26px;
  gap: 18px;
  align-items: center;
  padding: 20px 4px;
  border-bottom: 1px solid var(--line);
  transition: background 0.25s, padding 0.25s;
  text-align: left;
}
.news-row:hover { background: rgba(255, 255, 255, 0.6); padding-left: 12px; padding-right: 12px; }
.news-row .date { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.06em; color: var(--muted-2); }
.news-row h4 { margin: 0; font-family: var(--serif); font-size: 15.5px; font-weight: 600; line-height: 1.55; }
.news-row .arrow { color: var(--muted-2); transition: transform 0.25s, color 0.25s; }
.news-row:hover .arrow { transform: translateX(4px); color: var(--teal-deep); }
.news-row .arrow svg { width: 16px; height: 16px; }

.team-band {
  position: relative;
  min-height: 460px;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  isolation: isolate;
  color: #fff;
  border-radius: var(--radius);
}
.team-band img { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; z-index: -2; transition: transform 1s var(--ease); }
.team-band:hover img { transform: scale(1.03); }
.team-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(4, 10, 15, 0.9), rgba(4, 10, 15, 0.16) 70%);
  z-index: -1;
}
.team-band-body { padding: clamp(28px, 4vw, 50px); width: 100%; display: flex; align-items: flex-end; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.team-band h2 { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 46px); margin: 8px 0 0; line-height: 1.2; }
.team-counts { display: flex; gap: clamp(20px, 4vw, 50px); }
.team-counts b { display: block; font-family: var(--serif); font-size: clamp(26px, 3.2vw, 40px); line-height: 1; }
.team-counts span { display: block; margin-top: 8px; font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.14em; text-transform: uppercase; color: rgba(255, 255, 255, 0.55); }

.cta-band {
  position: relative;
  overflow: hidden;
  background: linear-gradient(110deg, #0b8f84 0%, #0f7f91 48%, #2e5bff 120%);
  color: #fff;
  padding: clamp(56px, 7vw, 92px) 0;
}
.cta-band::after {
  content: "ELASTOMER";
  position: absolute;
  right: -30px;
  bottom: -56px;
  font-family: var(--mono);
  font-size: clamp(80px, 15vw, 220px);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.06);
  line-height: 1;
  pointer-events: none;
}
.cta-inner { position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between; gap: 40px; flex-wrap: wrap; }
.cta-inner h2 { font-family: var(--serif); font-size: clamp(30px, 4vw, 52px); line-height: 1.2; margin: 0; max-width: 760px; letter-spacing: -0.02em; }
.cta-inner p { margin: 14px 0 0; color: rgba(255, 255, 255, 0.72); font-size: 14.5px; max-width: 560px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* =========================================================
   page hero
   ========================================================= */
.page-hero {
  position: relative;
  background: var(--ink);
  color: #f2f5f4;
  padding: calc(var(--header-h) + clamp(46px, 6vw, 76px)) 0 clamp(48px, 6vw, 72px);
  overflow: hidden;
  isolation: isolate;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(720px 400px at 82% 12%, rgba(20, 184, 166, 0.17), transparent 65%),
    radial-gradient(520px 380px at 10% 100%, rgba(46, 91, 255, 0.12), transparent 60%);
  z-index: -1;
}
.page-hero::after {
  content: attr(data-index);
  position: absolute;
  right: -10px;
  bottom: -70px;
  font-family: var(--serif);
  font-weight: 800;
  font-size: clamp(160px, 26vw, 340px);
  line-height: 0.8;
  color: rgba(255, 255, 255, 0.035);
  letter-spacing: -0.05em;
  z-index: -1;
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255, 255, 255, 0.42);
  margin-bottom: 26px;
}
.breadcrumb a:hover { color: #fff; }
.breadcrumb .sep { color: rgba(255, 255, 255, 0.22); }
.page-hero-grid { display: grid; grid-template-columns: 1.25fr 0.75fr; gap: 50px; align-items: end; }
.page-hero h1 {
  font-family: var(--serif);
  font-size: clamp(42px, 6vw, 76px);
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin: 12px 0 0;
  font-weight: 800;
}
.page-hero h1 em { font-style: normal; color: var(--lime); }
.page-hero .lead { color: rgba(237, 242, 243, 0.62); margin-top: 20px; }
.page-hero-aside { padding-bottom: 6px; }
.page-hero-aside p { margin: 0; color: rgba(255, 255, 255, 0.5); font-size: 13px; line-height: 1.9; }
.page-hero-aside .k {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: 12px;
  display: block;
}
.page-hero-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 20px; }
.page-hero-tags span {
  font-size: 11.5px;
  padding: 5px 11px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  color: rgba(255, 255, 255, 0.62);
}

/* =========================================================
   about page
   ========================================================= */
.leader-grid {
  display: grid;
  grid-template-columns: 370px 1fr;
  gap: clamp(36px, 5vw, 74px);
  align-items: start;
}
.portrait-card {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.portrait-card-img { aspect-ratio: 4 / 5; overflow: hidden; background: #e7e4db; }
.portrait-card-img img { width: 100%; height: 100%; object-fit: cover; }
.portrait-card-body { padding: 26px 28px 28px; }
.portrait-card-body .role { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal-deep); }
.portrait-card-body h2 { font-family: var(--serif); font-size: 30px; margin: 8px 0 2px; }
.portrait-card-body .en { font-family: var(--mono); font-size: 10.5px; letter-spacing: 0.12em; color: var(--muted-2); text-transform: uppercase; }
.portrait-card-body ul { margin-top: 18px; display: flex; flex-direction: column; gap: 9px; }
.portrait-card-body li { font-size: 12.5px; color: var(--muted); line-height: 1.6; padding-left: 14px; position: relative; }
.portrait-card-body li::before { content: ""; position: absolute; left: 0; top: 9px; width: 5px; height: 5px; border-radius: 50%; background: var(--teal); }

.timeline { position: relative; }
.timeline::before {
  content: "";
  position: absolute;
  left: 88px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line);
}
.timeline-item {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 34px;
  padding: 0 0 26px;
  position: relative;
}
.timeline-item::before {
  content: "";
  position: absolute;
  left: 84px;
  top: 9px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--teal);
  z-index: 1;
  transition: background 0.3s;
}
.timeline-item:hover::before { background: var(--teal); }
.timeline-year { font-family: var(--mono); font-size: 11px; letter-spacing: 0.04em; color: var(--teal-deep); padding-top: 1px; text-align: right; }
.timeline-text { font-size: 14px; line-height: 1.8; color: var(--text); padding-top: 0; }
.timeline-text small { display: block; color: var(--muted); font-size: 12px; margin-top: 3px; }

.honor-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; }
.honor-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px 20px;
  transition: border-color 0.25s, transform 0.3s var(--ease);
}
.honor-card:hover { border-color: rgba(20, 184, 166, 0.4); transform: translateY(-2px); }
.honor-card .y {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.04em;
  color: var(--teal-deep);
  background: rgba(20, 184, 166, 0.09);
  border: 1px solid rgba(20, 184, 166, 0.16);
  padding: 3px 8px;
  border-radius: 6px;
  flex: none;
  margin-top: 2px;
}
.honor-card p { margin: 0; font-size: 13px; line-height: 1.75; color: var(--text); }

.composition-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(36px, 5vw, 70px); align-items: start; }
.comp-bars { display: flex; flex-direction: column; gap: 20px; }
.comp-bar .top { display: flex; justify-content: space-between; align-items: baseline; gap: 16px; margin-bottom: 7px; }
.comp-bar .label { font-size: 13px; color: var(--text); }
.comp-bar .value { font-family: var(--mono); font-size: 12px; color: var(--teal-deep); }
.comp-bar .track { height: 7px; border-radius: 999px; background: rgba(13, 27, 39, 0.08); overflow: hidden; }
.comp-bar .fill {
  height: 100%;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--teal-deep), var(--teal));
  width: 0;
  transition: width 1.2s var(--ease);
}
.is-visible .comp-bar .fill { width: var(--w); }

/* =========================================================
   research page
   ========================================================= */
.chapter-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 50;
  background: rgba(244, 241, 233, 0.92);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
}
.chapter-nav-inner { display: flex; align-items: center; gap: 4px; overflow-x: auto; scrollbar-width: none; }
.chapter-nav-inner::-webkit-scrollbar { display: none; }
.chapter-nav a {
  flex: none;
  padding: 15px 18px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  border-bottom: 2px solid transparent;
  transition: color 0.2s, border-color 0.2s;
  white-space: nowrap;
}
.chapter-nav a:hover, .chapter-nav a.is-active { color: var(--text); border-color: var(--teal); }

.research-section { padding: clamp(56px, 7vw, 96px) 0; border-bottom: 1px solid var(--line); }
.research-section:last-of-type { border-bottom: 0; }
.research-section-head {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 26px;
  align-items: start;
  margin-bottom: clamp(32px, 4vw, 52px);
}
.research-section-head .big-num {
  font-family: var(--serif);
  font-size: clamp(60px, 8vw, 110px);
  line-height: 0.8;
  color: transparent;
  -webkit-text-stroke: 1px rgba(13, 27, 39, 0.22);
  letter-spacing: -0.04em;
}
.research-section-head h2 { font-family: var(--serif); font-size: clamp(28px, 3.6vw, 46px); line-height: 1.2; margin: 0 0 14px; letter-spacing: -0.02em; }
.research-section-head .lead { max-width: 900px; }
.research-section-head .kicker { font-family: var(--mono); font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase; color: var(--teal-deep); display: block; margin-bottom: 10px; }

.sub-feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
  padding: clamp(30px, 4vw, 48px) 0;
}
.sub-feature + .sub-feature { border-top: 1px dashed rgba(13, 27, 39, 0.14); }
.sub-feature.reverse .sub-feature-img { order: 2; }
.sub-feature-img {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  background: #e9eeeb;
  border: 1px solid var(--line);
  aspect-ratio: 16 / 10;
}
.sub-feature-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease); }
.sub-feature:hover .sub-feature-img img { transform: scale(1.04); }
.sub-feature-img .num {
  position: absolute;
  left: 18px;
  top: 16px;
  z-index: 2;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  background: rgba(7, 16, 24, 0.62);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: 5px 9px;
  border-radius: 999px;
  backdrop-filter: blur(8px);
}
.sub-feature-body .tag { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal-deep); }
.sub-feature-body h3 { font-family: var(--serif); font-size: clamp(21px, 2.3vw, 30px); line-height: 1.35; margin: 10px 0 14px; letter-spacing: -0.015em; }
.sub-feature-body p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.95; }

.platform-links { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px; margin-top: 34px; }
.platform-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 18px 22px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--paper-2);
  transition: border-color 0.25s, transform 0.25s var(--ease);
}
.platform-card:hover { border-color: rgba(20, 184, 166, 0.45); transform: translateY(-2px); }
.platform-card .k { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted-2); }
.platform-card b { display: block; font-size: 14.5px; margin-top: 4px; }
.platform-card .url { font-family: var(--mono); font-size: 10.5px; color: var(--teal-deep); }
.platform-card svg { width: 18px; height: 18px; color: var(--teal-deep); flex: none; }

/* =========================================================
   members page
   ========================================================= */
.members-summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 42px;
}
.members-summary .item {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 22px 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
}
.members-summary .item b { font-family: var(--serif); font-size: clamp(30px, 3.4vw, 44px); line-height: 1; }
.members-summary .item span { font-size: 12px; color: var(--muted); letter-spacing: 0.06em; }
.members-summary .item:nth-child(2) b { color: var(--teal-deep); }

.member-toolbar {
  position: sticky;
  top: var(--header-h);
  z-index: 60;
  background: rgba(244, 241, 233, 0.94);
  backdrop-filter: blur(14px);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.member-toolbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 12px 0;
  flex-wrap: wrap;
}
.filter-tabs { display: flex; gap: 6px; flex-wrap: wrap; }
.filter-tab {
  padding: 9px 16px;
  border-radius: 999px;
  font-size: 12.5px;
  font-weight: 600;
  color: var(--muted);
  border: 1px solid transparent;
  transition: all 0.22s;
  white-space: nowrap;
}
.filter-tab:hover { color: var(--text); background: rgba(255, 255, 255, 0.6); }
.filter-tab.is-active { color: #fff; background: var(--ink); border-color: var(--ink); }
.filter-tab .count { font-family: var(--mono); font-size: 10px; opacity: 0.55; margin-left: 5px; }

.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 220px;
}
.search-wrap svg { position: absolute; left: 14px; width: 15px; height: 15px; color: var(--muted-2); pointer-events: none; }
.search-input {
  width: 100%;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.7);
  padding: 0 16px 0 40px;
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
}
.search-input:focus { border-color: var(--teal); background: #fff; }
.search-input::placeholder { color: var(--muted-2); }

.member-group { padding: clamp(42px, 5vw, 64px) 0 0; }
.member-group-head { display: flex; align-items: baseline; gap: 16px; margin-bottom: 24px; }
.member-group-head h2 { font-family: var(--serif); font-size: clamp(24px, 2.8vw, 34px); margin: 0; }
.member-group-head .n { font-family: var(--mono); font-size: 11px; color: var(--teal-deep); letter-spacing: 0.08em; }
.member-group-head .line { flex: 1; height: 1px; background: var(--line); }

.members-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(168px, 1fr));
  gap: 16px;
}
.member-card {
  position: relative;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  text-align: left;
  transition: transform 0.35s var(--ease), box-shadow 0.35s, border-color 0.3s;
}
.member-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(20, 184, 166, 0.35); }
.member-photo { aspect-ratio: 3 / 4; overflow: hidden; background: #e6e9e4; position: relative; }
.member-photo img { width: 100%; height: 100%; object-fit: cover; filter: saturate(0.9); transition: transform 0.6s var(--ease), filter 0.4s; }
.member-card:hover .member-photo img { transform: scale(1.05); filter: saturate(1.05); }
.member-photo::after {
  content: "查看简介";
  position: absolute;
  inset: auto 0 0;
  padding: 30px 12px 12px;
  background: linear-gradient(to top, rgba(7, 16, 24, 0.82), transparent);
  color: #fff;
  font-size: 11px;
  letter-spacing: 0.08em;
  text-align: center;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s, transform 0.3s;
}
.member-card:hover .member-photo::after { opacity: 1; transform: none; }
.member-card-body { padding: 13px 14px 15px; }
.member-card-body h3 { font-family: var(--serif); font-size: 16px; margin: 0; line-height: 1.4; }
.member-card-body p { margin: 3px 0 0; font-size: 11.5px; color: var(--muted); line-height: 1.5; }
.member-card.is-hidden { display: none; }

.members-empty {
  display: none;
  text-align: center;
  padding: 60px 20px;
  color: var(--muted);
  font-size: 14px;
}
.members-empty.is-visible { display: block; }

/* =========================================================
   publications page
   ========================================================= */
.pub-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-top: clamp(34px, 4vw, 52px);
}
.pub-stat { background: var(--paper-2); padding: 24px 26px; }
.pub-stat b { font-family: var(--serif); font-size: clamp(28px, 3.4vw, 42px); line-height: 1; display: block; letter-spacing: -0.02em; }
.pub-stat b small { font-family: var(--sans); font-size: 12px; color: var(--teal-deep); }
.pub-stat span { display: block; margin-top: 9px; font-size: 11.5px; color: var(--muted); letter-spacing: 0.06em; }

.year-chart {
  display: flex;
  align-items: flex-end;
  gap: clamp(6px, 1vw, 14px);
  height: 150px;
  padding: 22px 0 0;
  border-bottom: 1px solid var(--line);
  margin-bottom: 10px;
}
.year-bar { flex: 1; display: flex; flex-direction: column; justify-content: flex-end; align-items: center; gap: 8px; height: 100%; }
.year-bar .bar {
  width: 100%;
  min-height: 4px;
  border-radius: 5px 5px 0 0;
  background: linear-gradient(to top, var(--teal-deep), rgba(20, 184, 166, 0.35));
  transition: height 1s var(--ease), background 0.25s;
  position: relative;
}
.year-bar:hover .bar { background: linear-gradient(to top, var(--blue), var(--teal)); }
.year-bar .bar::after {
  content: attr(data-count);
  position: absolute;
  top: -22px;
  left: 50%;
  transform: translateX(-50%);
  font-family: var(--mono);
  font-size: 9.5px;
  color: var(--muted);
  opacity: 0;
  transition: opacity 0.2s;
}
.year-bar:hover .bar::after { opacity: 1; }
.year-bar .y { font-family: var(--mono); font-size: 9px; color: var(--muted-2); letter-spacing: 0.04em; }

.pub-tabs { display: flex; gap: 8px; margin: 34px 0 24px; flex-wrap: wrap; }
.pub-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--paper-2);
  font-size: 13px;
  font-weight: 600;
  color: var(--muted);
  transition: all 0.22s;
}
.pub-tab:hover { color: var(--text); border-color: rgba(13, 27, 39, 0.28); }
.pub-tab.is-active { background: var(--ink); border-color: var(--ink); color: #fff; }
.pub-tab .count { font-family: var(--mono); font-size: 10px; opacity: 0.6; }

.pub-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; margin-bottom: 28px; }
.pub-toolbar .search-wrap { min-width: 280px; }
.chip-row { display: flex; gap: 6px; flex-wrap: wrap; }
.chip {
  padding: 7px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: transparent;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  transition: all 0.2s;
}
.chip:hover { border-color: var(--teal); color: var(--text); }
.chip.is-active { background: var(--teal); border-color: var(--teal); color: #04110f; font-weight: 700; }

.pub-panel { display: none; }
.pub-panel.is-active { display: block; }

.paper-year { margin: 34px 0 4px; display: flex; align-items: baseline; gap: 14px; }
.paper-year h3 { font-family: var(--serif); font-size: 24px; margin: 0; }
.paper-year span { font-family: var(--mono); font-size: 10px; color: var(--muted-2); letter-spacing: 0.08em; }
.paper-year::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.paper-item {
  display: grid;
  grid-template-columns: 54px 1fr 34px;
  gap: 18px;
  align-items: start;
  padding: 18px 10px;
  border-bottom: 1px solid rgba(13, 27, 39, 0.08);
  transition: background 0.22s, padding 0.22s;
}
.paper-item:hover { background: rgba(255, 255, 255, 0.62); padding-left: 18px; padding-right: 18px; }
.paper-item .idx { font-family: var(--mono); font-size: 10px; color: var(--muted-2); padding-top: 4px; }
.paper-item .cite { font-size: 13.5px; line-height: 1.8; color: var(--text); }
.paper-item .cite b { font-weight: 600; }
.paper-item .pdf {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--line);
  display: grid;
  place-items: center;
  color: var(--muted);
  transition: all 0.22s;
  flex: none;
}
.paper-item .pdf:hover { background: var(--teal); border-color: var(--teal); color: #04110f; }
.paper-item .pdf svg { width: 14px; height: 14px; }
.paper-item.is-hidden { display: none; }

.patent-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.patent-card {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
  transition: border-color 0.25s, transform 0.25s var(--ease);
}
.patent-card:hover { border-color: rgba(20, 184, 166, 0.38); transform: translateY(-2px); }
.patent-card .no {
  font-family: var(--mono);
  font-size: 10px;
  color: var(--teal-deep);
  background: rgba(20, 184, 166, 0.08);
  border: 1px solid rgba(20, 184, 166, 0.15);
  border-radius: 6px;
  padding: 3px 7px;
  flex: none;
  margin-top: 1px;
}
.patent-card p { margin: 0; font-size: 12.5px; line-height: 1.75; color: var(--text); }
.patent-card.is-hidden { display: none; }

/* =========================================================
   facilities page
   ========================================================= */
.equip-stats { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 24px; }
.equip-stats span {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  padding: 6px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.45);
}
.equip-filter { display: flex; gap: 8px; flex-wrap: wrap; margin: 30px 0 10px; }

.equip-section { padding: clamp(34px, 4vw, 54px) 0 0; }
.equip-section-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 22px; }
.equip-section-head h2 { font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px); margin: 0; }
.equip-section-head span { font-family: var(--mono); font-size: 10px; color: var(--teal-deep); letter-spacing: 0.08em; }
.equip-section-head::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.equip-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 16px; }
.equip-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: 16px;
  overflow: hidden;
  cursor: zoom-in;
  transition: transform 0.35s var(--ease), box-shadow 0.35s, border-color 0.3s;
}
.equip-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: rgba(20, 184, 166, 0.35); }
.equip-img { aspect-ratio: 4 / 3; background: #fff; overflow: hidden; display: grid; place-items: center; padding: 8px; }
.equip-img img { width: 100%; height: 100%; object-fit: contain; transition: transform 0.5s var(--ease); }
.equip-card:hover .equip-img img { transform: scale(1.04); }
.equip-card-body { padding: 13px 16px 15px; }
.equip-card-body h3 { font-size: 13px; font-weight: 600; line-height: 1.55; margin: 0; }
.equip-card-body span { display: block; margin-top: 4px; font-family: var(--mono); font-size: 9px; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted-2); }

/* =========================================================
   life page
   ========================================================= */
.album-nav { display: flex; gap: 8px; flex-wrap: wrap; margin: 28px 0 8px; }
.album-section { padding: clamp(34px, 4vw, 54px) 0 0; }
.album-head { display: flex; align-items: baseline; gap: 14px; margin-bottom: 22px; }
.album-head h2 { font-family: var(--serif); font-size: clamp(24px, 2.8vw, 32px); margin: 0; }
.album-head span { font-family: var(--mono); font-size: 10px; color: var(--teal-deep); letter-spacing: 0.08em; }
.album-head::after { content: ""; flex: 1; height: 1px; background: var(--line); }

.gallery {
  columns: 3;
  column-gap: 16px;
}
.gallery-item {
  break-inside: avoid;
  margin-bottom: 16px;
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  cursor: zoom-in;
  background: #e6e9e4;
}
.gallery-item img { width: 100%; height: auto; display: block; transition: transform 0.7s var(--ease); }
.gallery-item:hover img { transform: scale(1.04); }
.gallery-item .cap {
  position: absolute;
  inset: auto 0 0;
  padding: 30px 14px 12px;
  background: linear-gradient(to top, rgba(7, 16, 24, 0.82), transparent);
  color: #fff;
  font-size: 12px;
  line-height: 1.5;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity 0.3s, transform 0.3s;
}
.gallery-item:hover .cap { opacity: 1; transform: none; }
.album-section.is-hidden { display: none; }

/* =========================================================
   news page
   ========================================================= */
.news-feature-wide {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--ink-2);
  color: #fff;
  margin-bottom: 42px;
  cursor: pointer;
  border: 1px solid rgba(255, 255, 255, 0.08);
}
.news-feature-wide-img { min-height: 340px; overflow: hidden; }
.news-feature-wide-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.9s var(--ease); }
.news-feature-wide:hover .news-feature-wide-img img { transform: scale(1.04); }
.news-feature-wide-body { padding: clamp(28px, 4vw, 46px); display: flex; flex-direction: column; justify-content: center; }
.news-feature-wide-body .tag { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.16em; color: var(--lime); text-transform: uppercase; margin-bottom: 16px; }
.news-feature-wide-body h2 { font-family: var(--serif); font-size: clamp(24px, 3vw, 36px); line-height: 1.35; margin: 0 0 14px; }
.news-feature-wide-body p { margin: 0 0 20px; color: rgba(255, 255, 255, 0.62); font-size: 13.5px; line-height: 1.85; }
.news-feature-wide-body .meta { font-family: var(--mono); font-size: 10px; letter-spacing: 0.1em; color: rgba(255, 255, 255, 0.42); }

.news-page-list { border-top: 1px solid var(--line); }
.news-page-row {
  display: grid;
  grid-template-columns: 100px 1fr 150px 34px;
  gap: 24px;
  align-items: center;
  padding: 22px 8px;
  border-bottom: 1px solid var(--line);
  cursor: pointer;
  transition: background 0.22s, padding 0.22s;
  text-align: left;
  width: 100%;
}
.news-page-row:hover { background: rgba(255, 255, 255, 0.62); padding-left: 16px; padding-right: 16px; }
.news-page-row .date { font-family: var(--mono); font-size: 10.5px; color: var(--muted-2); letter-spacing: 0.04em; }
.news-page-row h3 { margin: 0; font-family: var(--serif); font-size: 16px; font-weight: 600; line-height: 1.55; }
.news-page-row .cat { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.1em; color: var(--teal-deep); text-transform: uppercase; text-align: right; }
.news-page-row .arrow { color: var(--muted-2); transition: transform 0.22s, color 0.22s; }
.news-page-row:hover .arrow { transform: translateX(4px); color: var(--teal-deep); }
.news-page-row.is-hidden { display: none; }

/* =========================================================
   contact page
   ========================================================= */
.contact-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
.contact-card {
  position: relative;
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(26px, 3.4vw, 40px);
  overflow: hidden;
}
.contact-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--teal), var(--lime));
}
.contact-card .role { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal-deep); }
.contact-card h2 { font-family: var(--serif); font-size: 28px; margin: 8px 0 2px; }
.contact-card .sub { font-size: 12.5px; color: var(--muted); margin-bottom: 22px; }
.contact-rows { display: flex; flex-direction: column; gap: 13px; }
.contact-row { display: grid; grid-template-columns: 64px 1fr; gap: 14px; font-size: 13.5px; align-items: baseline; }
.contact-row .k { font-family: var(--mono); font-size: 10px; letter-spacing: 0.08em; color: var(--muted-2); }
.contact-row a { border-bottom: 1px solid rgba(20, 184, 166, 0.3); transition: border-color 0.2s, color 0.2s; }
.contact-row a:hover { color: var(--teal-deep); border-color: var(--teal-deep); }

.address-grid { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(28px, 4vw, 56px); align-items: center; }
.address-card {
  background: var(--paper-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(26px, 3.4vw, 40px);
}
.address-card h2 { font-family: var(--serif); font-size: clamp(24px, 2.8vw, 32px); margin: 0 0 8px; }
.address-card p { color: var(--muted); font-size: 13.5px; line-height: 1.9; margin: 0 0 20px; }
.address-map { border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); background: #fff; }
.address-map img { width: 100%; height: auto; }

.link-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--paper-2);
  font-size: 13.5px;
  font-weight: 600;
  transition: border-color 0.25s, transform 0.25s var(--ease);
}
.link-card:hover { border-color: rgba(20, 184, 166, 0.42); transform: translateY(-2px); }
.link-card svg { width: 15px; height: 15px; color: var(--teal-deep); flex: none; }

.join-wrap {
  background: var(--ink);
  color: #edf2f3;
  border-radius: var(--radius);
  padding: clamp(30px, 5vw, 60px);
  position: relative;
  overflow: hidden;
}
.join-wrap::after {
  content: "";
  position: absolute;
  width: 480px;
  height: 480px;
  right: -160px;
  top: -180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.22), transparent 65%);
  pointer-events: none;
}
.join-wrap .h2 { color: #fff; }
.join-intro { color: rgba(255, 255, 255, 0.62); font-size: 14px; line-height: 1.9; max-width: 760px; margin: 20px 0 0; }
.recruit-table-wrap { overflow-x: auto; margin-top: 30px; border: 1px solid rgba(255, 255, 255, 0.14); border-radius: 14px; }
.recruit-table { width: 100%; border-collapse: collapse; min-width: 720px; }
.recruit-table th, .recruit-table td { padding: 14px 16px; text-align: left; font-size: 12.5px; line-height: 1.7; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.recruit-table th { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--lime); background: rgba(255, 255, 255, 0.04); }
.recruit-table tr:last-child td { border-bottom: 0; }
.recruit-table td:first-child { color: var(--teal); font-family: var(--mono); font-size: 11px; }
.recruit-req { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; margin-top: 26px; }
.recruit-req div { border: 1px solid rgba(255, 255, 255, 0.12); border-radius: 12px; padding: 16px 18px; font-size: 12.5px; line-height: 1.8; color: rgba(255, 255, 255, 0.66); }
.recruit-contact { margin-top: 26px; display: flex; gap: 14px; flex-wrap: wrap; }
.recruit-contact a { border-color: rgba(255, 255, 255, 0.3); color: #fff; }
.recruit-contact a:hover { background: rgba(255, 255, 255, 0.1); }

/* =========================================================
   footer
   ========================================================= */
.site-footer { background: var(--ink); color: rgba(255, 255, 255, 0.62); position: relative; overflow: hidden; }
.site-footer::before {
  content: "ELASTOMER COMPOSITES";
  position: absolute;
  left: -10px;
  bottom: 64px;
  font-family: var(--mono);
  font-size: clamp(50px, 10vw, 150px);
  font-weight: 700;
  letter-spacing: -0.03em;
  color: rgba(255, 255, 255, 0.032);
  white-space: nowrap;
  pointer-events: none;
}
.footer-top { padding: clamp(50px, 6vw, 78px) 0 46px; display: grid; grid-template-columns: 1.35fr 0.65fr 0.65fr 0.9fr; gap: clamp(28px, 4vw, 56px); position: relative; z-index: 1; }
.footer-brand .brand { margin-bottom: 18px; }
.footer-brand p { margin: 0; font-size: 12.5px; line-height: 1.9; color: rgba(255, 255, 255, 0.45); max-width: 330px; }
.footer-brand .footer-en { font-family: var(--mono); font-size: 9px; letter-spacing: 0.16em; color: rgba(255, 255, 255, 0.3); margin-top: 16px; }
.footer-col h4 { margin: 0 0 16px; font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.18em; text-transform: uppercase; color: rgba(255, 255, 255, 0.38); font-weight: 500; }
.footer-col a, .footer-col p { display: block; margin: 0 0 10px; font-size: 12.5px; color: rgba(255, 255, 255, 0.66); line-height: 1.7; transition: color 0.2s; }
.footer-col a:hover { color: var(--lime); }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.09);
  padding: 18px 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
  font-size: 10.5px;
  color: rgba(255, 255, 255, 0.32);
  position: relative;
  z-index: 1;
}
.footer-bottom a:hover { color: #fff; }

/* =========================================================
   modal / lightbox
   ========================================================= */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.modal.is-open { display: flex; }
.modal-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(4, 10, 15, 0.78);
  backdrop-filter: blur(8px);
}
.modal-panel {
  position: relative;
  z-index: 1;
  width: min(920px, 100%);
  max-height: min(86vh, 900px);
  overflow: auto;
  background: var(--paper-2);
  border-radius: var(--radius);
  box-shadow: var(--shadow-strong);
  animation: modalIn 0.35s var(--ease);
}
@keyframes modalIn {
  from { opacity: 0; transform: translateY(18px) scale(0.985); }
  to { opacity: 1; transform: none; }
}
.modal-close {
  position: absolute;
  right: 14px;
  top: 14px;
  z-index: 4;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(7, 16, 24, 0.72);
  color: #fff;
  display: grid;
  place-items: center;
  backdrop-filter: blur(8px);
  transition: background 0.2s;
}
.modal-close:hover { background: var(--teal-deep); }
.modal-close svg { width: 16px; height: 16px; }

.member-modal-grid { display: grid; grid-template-columns: 300px 1fr; }
.member-modal-photo { background: #e6e9e4; min-height: 420px; }
.member-modal-photo img { width: 100%; height: 100%; object-fit: cover; }
.member-modal-body { padding: clamp(28px, 4vw, 44px); }
.member-modal-body .group { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.16em; text-transform: uppercase; color: var(--teal-deep); }
.member-modal-body h2 { font-family: var(--serif); font-size: clamp(28px, 3.4vw, 38px); margin: 8px 0 2px; }
.member-modal-body .role { font-size: 13px; color: var(--muted); }
.member-profile { margin-top: 24px; border-top: 1px solid var(--line); padding-top: 18px; }
.profile-sub {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--teal-deep);
  margin: 20px 0 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.profile-sub::after { content: ""; flex: 1; height: 1px; background: var(--line); }
.profile-p { margin: 0 0 9px; font-size: 13px; line-height: 1.85; color: var(--text); }
.profile-p.muted { color: var(--muted); }
.profile-email { margin-top: 18px; display: inline-flex; align-items: center; gap: 8px; font-size: 12.5px; color: var(--teal-deep); border-bottom: 1px solid rgba(20, 184, 166, 0.3); }
.profile-email svg { width: 14px; height: 14px; }
.member-modal-empty { color: var(--muted); font-size: 13px; line-height: 1.8; }

.article-modal .modal-panel { width: min(820px, 100%); }
.article-hero { aspect-ratio: 16 / 8; overflow: hidden; background: #dde3df; }
.article-hero img { width: 100%; height: 100%; object-fit: cover; }
.article-body { padding: clamp(28px, 4vw, 48px); }
.article-body .meta { font-family: var(--mono); font-size: 10px; letter-spacing: 0.12em; color: var(--teal-deep); text-transform: uppercase; }
.article-body h2 { font-family: var(--serif); font-size: clamp(26px, 3.4vw, 38px); line-height: 1.35; margin: 12px 0 20px; }
.article-body p { margin: 0 0 14px; font-size: 14.5px; line-height: 1.95; color: var(--text); }
.article-body img { border-radius: 12px; margin: 18px 0; }
.article-body .article-note { font-size: 12px; color: var(--muted); border-top: 1px solid var(--line); padding-top: 14px; margin-top: 24px; }

.highlight-modal .modal-panel { width: min(880px, 100%); }
.highlight-modal-img { aspect-ratio: 16 / 8.5; overflow: hidden; background: #e9eeeb; }
.highlight-modal-img img { width: 100%; height: 100%; object-fit: cover; }
.highlight-modal-body { padding: clamp(28px, 4vw, 46px); }
.highlight-modal-body .tag { font-family: var(--mono); font-size: 9.5px; letter-spacing: 0.16em; color: var(--teal-deep); text-transform: uppercase; }
.highlight-modal-body h2 { font-family: var(--serif); font-size: clamp(26px, 3.2vw, 36px); line-height: 1.35; margin: 10px 0 16px; }
.highlight-modal-body p { margin: 0; font-size: 14px; line-height: 1.95; color: var(--text); }

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 400;
  display: none;
  align-items: center;
  justify-content: center;
  background: rgba(3, 8, 12, 0.94);
  padding: 34px;
}
.lightbox.is-open { display: flex; }
.lightbox img { max-width: min(1200px, 92vw); max-height: 82vh; width: auto; height: auto; border-radius: 8px; object-fit: contain; }
.lightbox-cap {
  position: absolute;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.72);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  text-align: center;
  max-width: 80vw;
}
.lightbox-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.22);
  color: #fff;
  display: grid;
  place-items: center;
  transition: background 0.2s;
}
.lightbox-btn:hover { background: rgba(255, 255, 255, 0.12); }
.lightbox-btn svg { width: 18px; height: 18px; }
.lightbox-prev { left: 22px; }
.lightbox-next { right: 22px; }
.lightbox-close { top: 22px; right: 22px; transform: none; }

/* =========================================================
   reveal animations
   ========================================================= */
[data-reveal] {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}
[data-reveal].is-visible { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: 0.08s; }
[data-reveal][data-delay="2"] { transition-delay: 0.16s; }
[data-reveal][data-delay="3"] { transition-delay: 0.24s; }
[data-reveal][data-delay="4"] { transition-delay: 0.32s; }
[data-reveal][data-delay="5"] { transition-delay: 0.4s; }

/* =========================================================
   responsive
   ========================================================= */
@media (max-width: 1180px) {
  .nav a { padding: 9px 9px; font-size: 12.5px; }
  .brand-name { font-size: 15px; }
  .brand-en { font-size: 7.5px; }
  .nav-actions .btn { padding: 0 14px; }
}

@media (max-width: 1080px) {
  :root { --header-h: 78px; }
  .topbar { display: none; }
  .navbar { height: 78px; }
  .nav, .nav-actions .btn:not(.btn-menu-cta) { display: none; }
  .burger { display: block; }
  .nav-actions .btn-menu-cta { display: inline-flex; }
  .hero-inner { grid-template-columns: 1fr; min-height: 0; padding-top: 52px; }
  .hero-copy { max-width: 760px; }
  .hero-visual { max-width: 620px; margin: 8px auto 0; width: 100%; }
  .hero-float { left: -10px; bottom: 30px; }
  .hero-badge { width: 92px; height: 92px; right: -10px; top: -16px; }
  .hero-stats { grid-template-columns: repeat(4, 1fr); }
  .about-grid, .news-home-grid, .composition-grid, .address-grid { grid-template-columns: 1fr; }
  .about-statement .h2 { max-width: none; }
  .leader-grid { grid-template-columns: 320px 1fr; gap: 40px; }
  .highlights-grid { grid-template-columns: repeat(2, 1fr); }
  .research-grid { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1.4fr 0.6fr 0.6fr; }
  .footer-col:last-child { grid-column: 1 / -1; }
  .page-hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .page-hero-aside { max-width: 620px; }
}

@media (max-width: 860px) {
  .container { width: calc(100% - 40px); }
  .hero h1 { font-size: clamp(42px, 10vw, 64px); }
  .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 22px 16px; }
  .scroll-hint { display: none; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 18px; }
  .section-head-side { max-width: none; }
  .leader-strip { grid-template-columns: 1fr; }
  .leader-strip-photo { aspect-ratio: 16 / 9; }
  .leader-strip-photo img { object-position: center 22%; }
  .leader-grid { grid-template-columns: 1fr; }
  .portrait-card { position: static; max-width: 420px; }
  .timeline::before { left: 66px; }
  .timeline-item { grid-template-columns: 54px 1fr; gap: 28px; }
  .timeline-item::before { left: 62px; }
  .honor-grid { grid-template-columns: 1fr; }
  .research-section-head { grid-template-columns: 1fr; gap: 12px; }
  .research-section-head .big-num { font-size: 58px; }
  .sub-feature, .sub-feature.reverse { grid-template-columns: 1fr; }
  .sub-feature.reverse .sub-feature-img { order: 0; }
  .platform-links { grid-template-columns: 1fr; }
  .members-summary { grid-template-columns: 1fr; }
  .members-grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px; }
  .pub-stats { grid-template-columns: repeat(2, 1fr); }
  .patent-grid { grid-template-columns: 1fr; }
  .paper-item { grid-template-columns: 38px 1fr 30px; gap: 12px; }
  .news-page-row { grid-template-columns: 82px 1fr 30px; gap: 14px; }
  .news-page-row .cat { display: none; }
  .news-feature-wide { grid-template-columns: 1fr; }
  .news-feature-wide-img { min-height: 240px; }
  .gallery { columns: 2; }
  .contact-grid, .link-cards { grid-template-columns: 1fr; }
  .recruit-req { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: repeat(2, 1fr); }
  .footer-brand { grid-column: 1 / -1; }
  .footer-col:last-child { grid-column: auto; }
  .member-modal-grid { grid-template-columns: 1fr; }
  .member-modal-photo { min-height: 0; aspect-ratio: 4 / 3; }
  .member-modal-photo img { object-position: center 25%; }
  .modal { padding: 12px; }
  .modal-panel { max-height: 92vh; }
}

@media (max-width: 560px) {
  .container { width: calc(100% - 32px); }
  .hero { padding-top: 78px; }
  .hero h1 { font-size: clamp(38px, 12vw, 54px); }
  .hero-sub { font-size: 14.5px; }
  .hero-cta .btn { flex: 1; }
  .hero-float { padding: 12px 14px; left: 0; bottom: 16px; }
  .hero-float .num { font-size: 26px; }
  .hero-badge { display: none; }
  .hero-frame { transform: none; }
  .hero-stats { padding: 24px 0 28px; }
  .hero-stat .v { font-size: 30px; }
  .section { padding: 58px 0; }
  .h2 { font-size: 28px; }
  .highlights-grid { grid-template-columns: 1fr; }
  .news-row { grid-template-columns: 1fr 24px; gap: 10px; }
  .news-row .date { grid-column: 1 / -1; }
  .team-counts { gap: 22px; }
  .cta-inner h2 { font-size: 29px; }
  .cta-actions .btn { width: 100%; }
  .page-hero h1 { font-size: 38px; }
  .members-grid { grid-template-columns: repeat(2, 1fr); }
  .member-card-body h3 { font-size: 14.5px; }
  .member-card-body p { font-size: 10.5px; }
  .member-toolbar-inner { gap: 10px; }
  .search-wrap { min-width: 100%; }
  .filter-tabs { width: 100%; overflow-x: auto; flex-wrap: nowrap; }
  .pub-stats { grid-template-columns: 1fr 1fr; }
  .pub-stat { padding: 18px; }
  .year-chart { gap: 4px; height: 120px; }
  .year-bar .y { font-size: 7.5px; }
  .gallery { columns: 1; }
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .recruit-table { min-width: 640px; }
  .cta-band::after { font-size: 90px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
  [data-reveal] { opacity: 1; transform: none; }
}

/* ---------- component refinements ---------- */
.member-group.is-hidden,
.equip-section.is-hidden,
.paper-year.is-hidden { display: none; }
.news-row .title {
  font-family: var(--serif);
  font-size: 15.5px;
  font-weight: 600;
  line-height: 1.55;
  display: block;
}
.news-feature .nf-title,
.news-feature .nf-excerpt,
.news-feature-wide .nfw-title,
.news-feature-wide .nfw-excerpt { display: block; }
.news-feature .nf-title { font-family: var(--serif); font-size: clamp(22px, 2.6vw, 30px); line-height: 1.4; margin: 0 0 14px; }
.news-feature .nf-excerpt { margin: 12px 0 0; color: rgba(255,255,255,.66); font-size: 13.5px; line-height: 1.8; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.news-feature-wide .nfw-title { font-family: var(--serif); font-size: clamp(24px, 3vw, 36px); line-height: 1.35; margin: 0 0 14px; }
.news-feature-wide .nfw-excerpt { margin: 0 0 20px; color: rgba(255,255,255,.62); font-size: 13.5px; line-height: 1.85; }
.highlight-card .hc-title { display: block; font-family: var(--serif); font-size: 19px; line-height: 1.45; margin: 0 0 10px; }
.highlight-card .hc-text { display: block; color: var(--muted); font-size: 13px; line-height: 1.8; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.highlight-card .highlight-body { text-align: left; }
.member-photo, .member-card-body { display: block; }
.member-name { display: block; font-family: var(--serif); font-size: 16px; line-height: 1.4; }
.member-role { display: block; margin-top: 3px; font-size: 11.5px; color: var(--muted); line-height: 1.5; }
.equip-img, .equip-card-body { display: block; }
.equip-name { display: block; font-size: 13px; font-weight: 600; line-height: 1.55; }
.news-page-row .np-title { font-family: var(--serif); font-size: 16px; font-weight: 600; line-height: 1.55; }
.article-body img { width: 100%; }
[id] { scroll-margin-top: calc(var(--header-h) + 20px); }
.pdf.is-disabled { opacity: .22; }

/* ---------- second-pass refinements ---------- */
.research-card-img img,
.sub-feature-img img {
  object-fit: contain;
  padding: 12px;
  background: #f6f7f3;
}
.highlight-img img,
.highlight-modal-img img {
  object-fit: contain;
  padding: 8px;
  background: #f6f7f3;
}
.article-hero img { object-fit: cover; }
.pub-panel-inner [data-patent-panel] { display: none; }
.pub-panel-inner [data-patent-panel].is-active { display: block; }
.member-photo img { object-position: center 18%; }
.timeline::before { left: 94px; }
.timeline-item { grid-template-columns: 78px 1fr; gap: 36px; }
.timeline-item::before { left: 90px; }
.timeline-year { font-size: 10px; line-height: 1.5; }
@media (max-width: 860px) {
  .timeline::before { left: 66px; }
  .timeline-item { grid-template-columns: 54px 1fr; gap: 28px; }
  .timeline-item::before { left: 62px; }
}

/* ---------- mobile header refinement ---------- */
@media (max-width: 560px) {
  .nav-actions .btn-menu-cta { display: none; }
  .brand-name { font-size: 14.5px; }
  .brand-en { display: none; }
  .brand-mark { width: 40px; height: 40px; }
  .navbar { height: 72px; }
  :root { --header-h: 72px; }
}
@media (max-width: 400px) {
  .brand-name { font-size: 13.5px; }
}

.timeline::before { left: 110px; }
.timeline-item { grid-template-columns: 94px 1fr; gap: 34px; }
.timeline-item::before { left: 106px; }
.timeline-year { font-size: 9.8px; }
@media (max-width: 860px) {
  .timeline::before { left: 66px; }
  .timeline-item { grid-template-columns: 54px 1fr; gap: 28px; }
  .timeline-item::before { left: 62px; }
}

/* ---------- recruitment blocks / back to top ---------- */
.recruit-block h3 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--lime);
  font-weight: 500;
}
.recruit-block p { margin: 0 0 10px; font-size: 12.5px; line-height: 1.85; color: rgba(255,255,255,.66); }
.recruit-block p:last-child { margin-bottom: 0; }
.to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 90;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  border: 1px solid rgba(255,255,255,.2);
  display: grid;
  place-items: center;
  font-size: 18px;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .3s, transform .3s, background .2s;
  box-shadow: 0 14px 30px -14px rgba(0,0,0,.5);
}
.to-top.is-visible { opacity: 1; pointer-events: auto; transform: none; }
.to-top:hover { background: var(--teal-deep); }
@media (max-width: 560px) { .to-top { right: 14px; bottom: 14px; width: 42px; height: 42px; } }

.research-card-num { left: auto; right: 20px; }
.highlight-img .tag { left: auto; right: 14px; }
.sub-feature-img .num { left: auto; right: 18px; }

.news-feature, .news-feature-wide, .equip-card, .member-card, .highlight-card, .gallery-item { text-align: left; }
.hero-eyebrow { line-height: 1.45; }