:root{--bg:#edf2ee;--surface:#fcfcf5;--ink:#203e43;--muted:#627a74;--line:#c4d4c8;--accent:#336858;--soft:#dfe9df;--gold:#a17b35;--shadow:0 12px 35px #263e3910;color-scheme:light}*{box-sizing:border-box}[data-theme=dark]{--bg:#142727;--surface:#1d3434;--ink:#e1eee6;--muted:#abc3b7;--line:#3b5550;--accent:#a8cfad;--soft:#29453d;--gold:#ddbd75;--shadow:none;color-scheme:dark}body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.7 -apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button,input,select{font:inherit}button,a,input,select{outline-offset:4px}button{cursor:pointer}.top{padding:23px 4vw;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);gap:20px}.brand{font-weight:750;letter-spacing:.04em;font-size:19px}.brand span{font-weight:450;margin-left:8px}.top 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