:root{--ink:#1a2332;--muted:#6a7380;--line:#c8cdd4;--paper:#f4f1ea;--navy:#1a2332;--rule:#1a2332;--max:1160px}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Georgia,"Times New Roman","Songti SC","SimSun",serif;color:var(--ink);background:var(--paper);line-height:1.65}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{width:min(var(--max),calc(100% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:80;background:#efebe3;border-bottom:3px double var(--navy)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;min-height:64px;flex-wrap:wrap}
.brand{font-weight:800;letter-spacing:.18em;font-size:11px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
.nav{display:flex;gap:14px;flex-wrap:wrap;font-size:13px;font-weight:700;color:var(--muted);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:40px;padding:0 16px;border:1px solid var(--navy);font-weight:800;font-size:13px;cursor:pointer;background:transparent;color:var(--navy);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
.btn-fill{background:var(--navy);color:var(--paper);border-color:var(--navy)}
section{padding:52px 0;scroll-margin-top:72px}
.kicker{display:block;font-size:11px;font-weight:800;letter-spacing:.16em;color:var(--muted);margin-bottom:8px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
.section-head h2{font-size:clamp(22px,3vw,34px);line-height:1.2;margin-bottom:10px;font-weight:600}
.section-head p{color:var(--muted);max-width:640px}
.footer{padding:48px 0 22px;background:var(--navy);color:#c8cdd4}
.footer-grid{display:grid;grid-template-columns:1.3fr .8fr .9fr;gap:24px}
.footer h3,.footer h4{margin-bottom:12px;font-size:16px;color:#f4f1ea;font-weight:600}
.footer p,.footer a,.footer li{color:#9aa3ae;font-size:14px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
.footer ul{list-style:none;display:grid;gap:8px}
.copyright{margin-top:28px;padding-top:16px;border-top:1px solid #334056;font-size:12px;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
@media(max-width:720px){.nav{display:none}.footer-grid{grid-template-columns:1fr}}
img[data-src]{min-height:120px;background:rgba(26,35,50,.06)}
.below-fold{content-visibility:auto;contain-intrinsic-size:auto 480px}