:root{--bg:#FFF8F8;--paper:#fff;--soft:#FBE9EC;--text:#351C23;--body:#4B3037;--muted:#76545F;--accent:#C9365B;--foot:#321C24;--line:#EDD8DE}
*{box-sizing:border-box}
html{overflow-x:hidden}
body{margin:0;background:var(--bg);color:var(--body);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.82;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
button,a{touch-action:manipulation}
.shell{width:min(1160px,calc(100% - 40px));margin:auto}
.site-header{background:#fff;border-bottom:1px solid var(--line)}
.masthead{min-height:82px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.brand{display:flex;align-items:center;gap:14px;color:var(--text);font-weight:700}
.brand img{width:auto;height:auto;max-width:160px;max-height:42px;object-fit:contain}
.brand-en{letter-spacing:.16em;font-size:14px}
.mast-right{display:flex;gap:22px;align-items:center;color:var(--muted);font-size:14px}
.browse-toggle{display:none}
.primary-nav{border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.nav-row{display:flex;align-items:center;gap:6px;min-height:50px;flex-wrap:wrap}
.nav-row a,.nav-row button{padding:10px 12px;border:1px solid transparent;background:none;color:var(--text);font:inherit}
.nav-row a[aria-current="page"]{color:var(--accent);border-color:var(--line)}
.all-toggle{margin-left:auto;cursor:pointer}
.all-nav{background:var(--soft);border-bottom:1px solid var(--line)}
.all-nav-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:28px;padding:28px 0}
.all-nav h2,.site-footer h2{font-size:15px;margin:0 0 10px}
.all-nav a,.site-footer a{display:block;padding:5px 0}
.mobile-shortcuts{display:none}
.page-wrap{padding:34px 0 64px}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:12px}
.eyebrow{font-size:13px;color:var(--accent);letter-spacing:.08em}
h1,h2,h3{color:var(--text);line-height:1.35;margin-top:0}
h1{font-size:clamp(28px,3vw,38px);margin-bottom:16px}
h2{font-size:clamp(21px,2.2vw,27px);margin-bottom:14px}
h3{font-size:19px}
p{margin:0 0 16px}
.lede{max-width:760px;font-size:17px;color:var(--body)}
.section{padding:48px 0;border-top:1px solid var(--line)}
.section:first-of-type{border-top:0}
.hero-banner,.main-image,.compact-image,.side-image,.app-image{margin:22px auto;background:#fff;display:flex;justify-content:center;align-items:center}
.hero-banner img{width:auto;height:auto;max-width:100%;max-height:320px;object-fit:contain;object-position:center}
.main-image img{width:auto;height:auto;max-width:680px;max-height:400px;object-fit:contain;object-position:center}
.compact-image img{width:auto;height:auto;max-width:100%;max-height:220px;object-fit:contain;object-position:center}
.side-image img{width:auto;height:auto;max-width:100%;max-height:170px;object-fit:contain}
.app-image img{width:auto;height:auto;max-width:240px;max-height:360px;object-fit:contain}
.figure-note{text-align:center;font-size:13px;color:var(--muted);margin-top:8px}
.two-col{display:grid;grid-template-columns:minmax(0,3fr) minmax(0,2fr);gap:32px;align-items:start}
.three-col{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.two-even{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px}
.text-card{padding:20px 0;border-top:1px solid var(--line)}
.index-row{padding:16px 0;border-bottom:1px solid var(--line)}
.topic-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 30px}
.topic-item{padding:18px 0;border-top:1px solid var(--line)}
.reading-col{max-width:760px}
.notice{background:var(--soft);padding:18px 20px;border-radius:10px}
.related{margin-top:44px;padding-top:26px;border-top:1px solid var(--line)}
.related a{display:inline-block;margin:6px 18px 6px 0}
.site-footer{background:var(--foot);color:#f8ebee;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.site-footer h2,.site-footer strong{color:#fff}
.site-footer a{color:#f7d6de}
.footer-brand img{max-width:150px;max-height:40px;filter:brightness(0) invert(1);object-fit:contain;margin-bottom:8px}
.footer-brand span{display:block;letter-spacing:.15em;margin-bottom:12px}
.footer-note{border-top:1px solid rgba(255,255,255,.15);margin-top:28px;padding-top:18px;font-size:13px;color:#dbc6cc}
:focus-visible{outline:3px solid #8f2a45;outline-offset:3px}
@media(max-width:900px){
  .shell{width:min(100% - 48px,1160px)}
  .mast-right,.primary-nav{display:none}
  .browse-toggle{display:inline-flex;min-height:44px;align-items:center;padding:0 14px;background:#fff;border:1px solid var(--line);border-radius:8px;color:var(--text)}
  .mobile-shortcuts{display:flex;justify-content:center;gap:0;border-top:1px solid var(--line)}
  .mobile-shortcuts a{min-height:44px;padding:10px 18px;color:var(--text)}
  .all-nav-grid{grid-template-columns:repeat(2,1fr)}
  .two-col,.three-col,.two-even{grid-template-columns:1fr}
  .topic-list{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:640px){
  .shell{width:calc(100% - 32px)}
  .page-wrap{padding-top:24px}
  .section{padding:30px 0}
  .masthead{min-height:76px;gap:10px}
  .brand{gap:8px;min-width:0}
  .brand img{max-width:120px;max-height:36px}
  .brand-en{font-size:12px;letter-spacing:.1em}
  .all-nav-grid{grid-template-columns:1fr;gap:16px}
  .hero-banner img{max-height:220px}
  .main-image img{max-width:100%;max-height:300px}
  .compact-image img{max-height:200px}
  .app-image img{max-width:200px}
  .footer-grid{grid-template-columns:1fr}
  body{font-size:15.5px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}