.r-app{--paper:#f6f2e9;--cream:#fffdf7;--ink:#202522;--muted:#6e756d;--line:#dcded4;--accent:#c95b32;--accent-dark:#9d3f23;--mint:#dce7dc;--serif:"Songti SC","Noto Serif CJK SC","STSong",serif;background:var(--paper);min-height:100svh;color:var(--ink);letter-spacing:-.015em;font-family:PingFang SC,Noto Sans CJK SC,Microsoft YaHei,sans-serif}.r-app *{box-sizing:border-box}.r-app button,.r-app textarea{font:inherit}.r-app button{cursor:pointer}.r-app a{color:inherit;text-decoration:none}.r-app :focus-visible{outline:2px solid var(--accent);outline-offset:4px}.r-app p,.r-app h1,.r-app h2,.r-app h3,.r-app h4{margin-top:0}.r-app button:disabled{cursor:not-allowed;opacity:.48}.r-header{border-bottom:1px solid var(--line);background:var(--cream);grid-template-columns:1fr auto 1fr;align-items:center;gap:24px;height:78px;padding:0 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