:root{--bg:#f2f5f7;--paper:#fff;--ink:#102338;--muted:#66778a;--line:#d9e1e7;--teal:#0ba58f;--blue:#2774c8;--orange:#e9823f;--red:#d14d47;--navy:#0b1828;--shadow:0 14px 40px rgba(16,35,56,.07)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Noto Sans SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.55}.shell{width:min(1260px,calc(100% - 44px));margin:auto}.topbar{height:58px;background:var(--navy);color:white;display:flex;align-items:center;justify-content:space-between;padding:0 max(22px,calc((100vw - 1260px)/2));position:sticky;top:0;z-index:5}.brand{display:flex;gap:10px;align-items:center;color:white;text-decoration:none;font-size:.76rem;letter-spacing:.12em}.brand>span{display:grid;place-items:center;width:30px;height:30px;border:1px solid rgba(255,255,255,.25);color:#38d6bf;font-weight:800}.top-meta{display:flex;gap:12px;align-items:center;color:#aab9c8;font-size:.73rem}.top-meta 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