:root{--paper: #f7f2e8;--ink: #3a3226;--accent: #c0392b;--card: #fffdf7;--line: #e5dcc8;--shadow: 0 2px 12px rgba(90, 70, 40, .14);--radius: 10px}*{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;font-family:-apple-system,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;background:var(--paper);color:var(--ink);min-height:100vh}a{color:inherit;text-decoration:none}button{font-family:inherit;border:1px solid var(--line);background:var(--card);color:var(--ink);padding:7px 14px;border-radius:8px;cursor:pointer;font-size:14px;transition:all .15s}button:hover{border-color:var(--accent);color:var(--accent)}button.primary{background:var(--accent);border-color:var(--accent);color:#fff}button.primary:hover{opacity:.88}button:disabled{opacity:.5;cursor:not-allowed}input,textarea,select{font-family:inherit;font-size:14px;padding:8px 10px;border:1px solid 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