:root{--paper:#f4f0e8;--ink:#183c36;--muted:#6e7c73;--line:#d9dfd3;--coral:#e77c5c;--lime:#d7e49d;--white:#fffefa;--serif:Georgia,'Microsoft YaHei','Noto Sans SC',serif;--sans:Arial,'Microsoft YaHei','Noto Sans SC',sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.6 var(--sans)}a{color:inherit;text-decoration:none}button{font:inherit}.skip{position:absolute;left:-10000px}.skip:focus{left:1rem;top:1rem;background:#fff;padding:.7rem;z-index:9}.top{height:80px;display:flex;align-items:center;gap:clamp(1rem,4vw,4rem);padding:0 clamp(1rem,6vw,7rem);border-bottom:1px solid #dce0d6}.brand{display:flex;gap:11px;align-items:center;font-size:15px;font-weight:700;line-height:1.15;white-space:nowrap}.brand-mark{width:37px;height:37px;background:var(--ink);color:var(--lime);display:grid;place-items:center;font-size:20px;border-radius:50%}.brand small{display:block;letter-spacing:.17em;font:9px 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