:root{--fg:#1d1d1f;--muted:#6e6e73;--line:#e5e5ea;--bg:#fafafa;--card:#fff;--accent:#0a6c5a;--accent-fg:#fff;--warn:#a33a00}*{box-sizing:border-box}body,html{margin:0;padding:0;background:var(--bg);color:var(--fg);font-family:-apple-system,PingFang SC,Microsoft YaHei,system-ui,sans-serif;font-size:16px}a{color:var(--accent)}.page{max-width:720px;margin:0 auto;padding:24px 16px}.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px}.muted{color:var(--muted)}.err,.muted{font-size:14px}.err{color:var(--warn);min-height:20px}label{display:block;font-size:14px;color:var(--muted);margin:14px 0 6px}input,textarea{width:100%;font:inherit;padding:12px;border:1px solid var(--line);border-radius:10px;background:#fff}textarea{resize:none}button{font:inherit;border:0;border-radius:10px;padding:12px 18px;background:var(--accent);color:var(--accent-fg);cursor:pointer}button[disabled]{opacity:.5;cursor:default}button.link{background:none;color:var(--accent);padding:0 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