:root{--ink:#172321;--muted:#61716e;--teal:#247f77;--teal-dark:#155f59;--mint:#dfeeea;--paper:#fbfcfb;--line:#d9e4e1;--yellow:#e7b84a;--pink:#d97589;--blue:#6f9ed1;--sidebar:248px;--radius:8px;--shadow:0 12px 28px rgba(30,77,70,.08)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",sans-serif;background:#2a877e;letter-spacing:0}.shell{min-height:100vh;display:grid;grid-template-columns:var(--sidebar) 1fr;padding:10px}.sidebar{height:calc(100vh - 20px);position:sticky;top:10px;padding:24px 18px 18px;color:#eef9f7;display:flex;flex-direction:column}.brand{display:flex;align-items:center;gap:12px;color:white;text-decoration:none;padding:0 8px 24px}.brand-mark{width:42px;height:42px;border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.12);display:grid;place-items:center;border-radius:8px;font-weight:800}.brand strong,.brand small{display:block}.brand strong{font-size:17px}.brand small{font-size:11px;opacity:.68;margin-top:3px}.main-nav,.side-footer{display:grid;gap:6px}.main-nav a,.side-footer a{display:flex;align-items:center;gap:12px;color:rgba(255,255,255,.78);text-decoration:none;padding:13px 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rgba(36,127,119,.25);border-radius:50%;position:relative;background:radial-gradient(circle at center,#eff8f6 0 18%,transparent 19%),repeating-radial-gradient(circle at 50% 50%,rgba(36,127,119,.12) 0 1px,transparent 2px 25px)}.scope:before,.scope:after{content:"";position:absolute;background:var(--teal)}.scope:before{width:62%;height:1px;top:50%;left:19%}.scope:after{height:62%;width:1px;left:50%;top:19%}.scope-label{position:absolute;background:white;padding:12px 14px;border-radius:6px;box-shadow:var(--shadow);font-size:12px}.scope-label.a{top:15%;right:0}.scope-label.b{bottom:17%;left:-5%}.scope-label strong{display:block;font-size:16px;margin-bottom:4px}.section{padding:48px 0;border-top:1px solid rgba(36,127,119,.12)}.section-title{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:22px}.section-title h2{font-family:Georgia,"Songti SC",serif;font-size:28px;margin:0}.section-title p{margin:6px 0 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@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important;animation:none!important}}