:root{--paper:#FFF8F2;--white:#FFFFFF;--soft:#F3EBE3;--ink:#1A1230;--text:#2C2440;--muted:#5A5270;--aux:#8A8298;--pink:#E11D8F;--indigo:#6366F1;--cyan:#0891B2;--amber:#D97706;--mint:#059669;--line:rgba(26,18,48,.10);--shadow:0 14px 34px rgba(26,18,48,.08);--max:1160px;--head:72px;--band:46px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;line-height:1.75;overflow-x:hidden;padding-top:calc(var(--head) + var(--band))}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:16px;top:-80px;z-index:2000;background:var(--ink);color:#fff;padding:10px 16px;border-radius:999px}.skip-link:focus{top:8px}.masthead{position:fixed;z-index:1000;top:0;left:0;right:0;height:var(--head);display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 max(16px,calc((100vw - var(--max))/2));background:rgba(255,248,242,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.square-btn,.icon-btn,.close-btn{width:44px;height:44px;border:1px solid var(--line);background:#fff;color:var(--ink);border-radius:12px;cursor:pointer}.square-btn{justify-self:start}.brand-mark{display:flex;align-items:center;justify-content:center;font-weight:900;font-size:22px;letter-spacing:.08em}.brand-logo{display:block;max-height:38px;max-width:220px;width:auto}.head-actions{justify-self:end;display:flex;align-items:center;gap:8px}.app-link,.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;border-radius:999px;font-weight:800}.app-link{background:var(--ink);color:#fff}.chapter-band{position:fixed;top:var(--head);left:0;right:0;z-index:990;height:var(--band);display:flex;align-items:center;justify-content:center;gap:32px;background:#fff;border-bottom:1px solid var(--line)}.chapter-band a{height:46px;display:flex;align-items:center;border-bottom:3px solid transparent;font-weight:700;color:var(--muted)}.chapter-band a.active{color:var(--ink);border-color:var(--pink)}.site-main{min-height:60vh}.wrap{width:min(var(--max),calc(100% - 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