:root {
  --bg:#FAF7F2; --ink:#0E4C4A; --accent:#F26B1D;
  --muted:#5C6B6A; --card:#FFFFFF; --line:#E7E0D6;
  --gap:24px; --radius:14px; --soft:#FFF0E3;
  font-family:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",system-ui,sans-serif;
  color:var(--ink); background:var(--bg); line-height:1.6;
}
* { box-sizing:border-box; }
html { scroll-padding-top:90px; }
body { margin:0; overflow-x:hidden; }
a { color:inherit; text-decoration:none; }
a:hover { text-decoration:underline; text-underline-offset:4px; }
:focus-visible { outline:2px solid var(--accent); outline-offset:4px; }
img { display:block; max-width:100%; height:auto; }
h1,h2,h3 { margin:0 0 12px; line-height:1.25; }
h1 { font-size:40px; max-width:11em; }
h2 { font-size:28px; }
h3 { font-size:20px; }
p { margin:0 0 16px; color:var(--muted); }
figure { margin:0; }
.wrap { width:min(1200px,calc(100% - 48px)); margin-inline:auto; }
.top { position:sticky; top:0; z-index:2; border-bottom:1px solid var(--line); background:var(--bg); }
.nav,.footer { display:flex; align-items:center; justify-content:space-between; gap:16px; min-height:70px; }
.brand { font-weight:800; font-size:20px; white-space:nowrap; }
.brand span { color:var(--accent); }
.links { display:flex; align-items:center; gap:28px; }
.menu { display:none; font:inherit; color:inherit; background:var(--card); border:1px solid var(--line); padding:7px 12px; border-radius:10px; cursor:pointer; }
.button,.outline { display:inline-flex; align-items:center; gap:12px; padding:10px 17px; border-radius:10px; font-weight:700; }
.button { background:var(--accent); color:#29160B; }
.outline { border:1px solid var(--ink); }
.hero,.gate { display:grid; gap:40px; align-items:center; padding-block:64px; }
.lead { font-size:18px; color:var(--ink); }
.tag { display:inline-block; padding:4px 10px; background:var(--soft); color:#85380E; font-weight:700; border-radius:6px; font-size:14px; margin-bottom:14px; }
.hero-art { background:#FCE8D6; border-radius:22px; overflow:hidden; }
.hero-art img { width:100%; }
figcaption { padding:0 18px 14px; color:var(--muted); font-size:14px; }
.section { padding-block:24px 38px; }
.section>h2 { margin-bottom:20px; }
.scenes,.products,.trial { display:grid; gap:var(--gap); }
.card { background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:22px; box-shadow:0 4px 16px #0e4c4a09; min-width:0; }
.card p:last-child { margin-bottom:0; }
.card aside { background:var(--bg); border-left:3px solid var(--accent); padding:10px 12px; }
.card aside p { margin:4px 0 0; font-size:14px; }
.products img { width:100%; height:112px; object-fit:contain; background:var(--bg); border-radius:10px; margin-bottom:16px; }
small { color:var(--muted); }
.report { background:var(--ink); color:white; padding:28px; border-radius:var(--radius); display:grid; gap:12px; }
.report p { color:white; }
.report .tag { color:#85380E; }
.report dl { display:flex; gap:32px; margin:0; }
.report dd { margin:0; font-size:26px; font-weight:800; }
.report-note { margin:0; }
.contact { margin:0; }
.faq { margin-top:28px; }
details { border-bottom:1px solid var(--line); }
summary { cursor:pointer; padding:12px 0; font-weight:700; }
details p { margin-left:16px; }
footer { border-top:1px solid var(--line); }
.gate img { background:#FCE8D6; border-radius:var(--radius); }
.gate .card { padding:30px; }
#address { margin:12px 0 0; }
@media (min-width:768px) {
  .scenes { grid-template-columns:repeat(3,minmax(0,1fr)); }
  .products,.trial { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .report { grid-template-columns:1fr auto; align-items:center; }
  .report-note { grid-column:1/-1; }
}
@media (min-width:1024px) {
  .hero,.gate { grid-template-columns:repeat(2,minmax(0,1fr)); }
  .products { grid-template-columns:repeat(4,minmax(0,1fr)); }
}
@media (max-width:767px) {
  .wrap { width:calc(100% - 36px); }
  .nav { flex-wrap:wrap; min-height:62px; }
  .menu:not([hidden]) { display:block; }
  .links { width:100%; flex-wrap:wrap; gap:12px 20px; padding-bottom:14px; }
  .menu:not([hidden]) + .links:not(.open) { display:none; }
  .hero,.gate { gap:24px; padding-block:36px; }
  h1 { font-size:34px; }
}

/* Institution website pages */
.institutional { padding-block:80px; }
.institutional h1 { max-width:none; font-size:clamp(34px,4vw,54px); letter-spacing:-.035em; }
.page-intro { padding:64px 0 32px; }
.page-intro h1 { max-width:none; }
.page-intro .lead { max-width:46em; }
.actions { display:flex; flex-wrap:wrap; gap:12px; }
.feature { border:1px solid var(--line); border-radius:16px; background:white; overflow:hidden; box-shadow:0 14px 38px #0e4c4a12; }
.feature img { width:100%; }
.feature figcaption { padding:12px 16px; }
.feature .data-label { background:var(--soft); color:#85380E; }
.catalog { display:grid; gap:24px; }
.catalog img { width:100%; height:230px; object-fit:contain; background:var(--bg); border-radius:10px; margin-bottom:18px; }
.catalog h2 { font-size:22px; }
.callout { display:flex; flex-wrap:wrap; align-items:center; justify-content:space-between; gap:16px; padding:28px; border-radius:16px; background:var(--ink); color:white; }
.callout p { color:white; margin:0; }
.text-link { text-decoration:underline; text-underline-offset:4px; font-weight:700; overflow-wrap:anywhere; }
.subhead { margin-top:24px; }
.prototype-links { display:flex; flex-wrap:wrap; gap:12px 24px; list-style:none; padding:0; }
.prototype-links a { text-decoration:underline; }
@media (min-width:768px) { .catalog { grid-template-columns:repeat(2,minmax(0,1fr)); } }
@media (max-width:767px) {
  html { scroll-padding-top:145px; }
  .nav { padding-block:10px; gap:8px; }
  .links { gap:8px 14px; padding-bottom:0; font-size:14px; }
  .institutional,.page-intro { padding-top:36px; }
}
 
.footer small { font-size:14px; }
.footer a { flex-shrink:0; }
@media (max-width:767px) {
  .footer { flex-wrap:wrap; justify-content:flex-start; gap:8px 20px; padding-block:16px; }
}

.nav .brand { display:inline-flex; align-items:center; gap:8px; }
.brand-logo { width:34px; height:38px; object-fit:contain; }
.brand-cover {
  color:#fff;
  background:radial-gradient(ellipse at 80% 62%, #572407 0%, transparent 52%),
    linear-gradient(135deg, #151235, #211014 70%, #251207);
  margin-bottom:28px;
}
.brand-cover .cover-kicker { color:#ffd6b8; margin-bottom:20px; }
.brand-cover h1 { font-size:clamp(36px,6vw,78px); }
.brand-cover h1 span { color:#ff8a43; }
.brand-cover .lead { color:#f2e4dd; max-width:31em; }
.brand-cover .outline { color:#fff; border-color:#e9c7b3; }
.cover-mascot { width:min(100%,360px); justify-self:center; }
.home-products img { width:100%; height:155px; object-fit:contain; margin-bottom:16px; border-radius:10px; background:var(--bg); }
.section-link { margin:18px 0 0; }
@media (max-width:1023px) {
  .cover-mascot { width:min(65%,290px); }
}

.wechat-codes {
  display:grid;
  grid-template-columns:repeat(2,minmax(0,1fr));
  gap:12px;
}
.wechat-codes img {
  width:100%;
  max-width:180px;
  height:auto;
}

.evidence {
  display:grid;
  align-items:center;
  gap:24px;
}
.evidence > div {
  border-left:4px solid var(--accent);
  padding-left:20px;
}
@media (min-width:1024px) {
  .evidence { grid-template-columns:minmax(0, 2fr) minmax(0, 3fr); }
}

.parent-previews {
  display:grid;
  grid-template-columns:repeat(3,minmax(0,1fr));
  align-items:center;
  gap:8px;
  min-height:230px;
  margin-bottom:18px;
  border-radius:10px;
  background:var(--bg);
  text-align:center;
}
.parent-previews img {
  height:190px;
  margin:0;
  border-radius:0;
  background:transparent;
}
.parent-previews figcaption {
  padding:6px 0 0;
  font-size:12px;
}