:root{--paper:#f7f5ef;--ink:#1c2823;--muted:#69736e;--line:#d9ddd4;--surface:#fffdf8;--accent:#24634d;--accent-strong:#174a39;--warning:#9a6727;--danger:#a3443a;--radius:8px;--shadow:0 16px 42px rgba(25,38,31,.12);font-family:ui-serif,Georgia,'Noto Serif SC','Songti SC',serif;color:var(--ink);background:var(--paper)}*{box-sizing:border-box}body{margin:0;min-height:100vh}.topbar{height:64px;display:grid;grid-template-columns:1fr auto 1fr;align-items:center;padding:0 28px;border-bottom:1px solid var(--line);background:rgba(247,245,239,.96);position:sticky;top:0;z-index:10}.brand{display:flex;align-items:center;gap:10px;color:inherit;text-decoration:none;font-weight:700;letter-spacing:.04em}.brand-mark{background:var(--ink);color:var(--paper);border-radius:50%;width:29px;height:29px;display:grid;place-items:center;font-size:14px}.status-line{font-family:ui-sans-serif,-apple-system,BlinkMacSystemFont,'PingFang 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h2{font-size:28px}.settings-nav{border-right:1px solid var(--line);padding:16px 12px}.settings-nav button{display:block;width:100%;text-align:left;border:0;background:transparent;padding:10px 11px;border-radius:5px;font:600 13px ui-sans-serif,-apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;color:var(--muted);cursor:pointer}.settings-nav button.active,.settings-nav button:hover{background:#edf0e9;color:var(--ink)}.settings-body{overflow:auto;padding:28px 30px 60px}.settings-pane{display:none}.settings-pane.active{display:block}.settings-pane h3{margin:0 0 6px;font-size:20px}.helper{font:13px/1.6 ui-sans-serif,-apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;color:var(--muted);margin:0 0 22px}.settings-pane label{display:block;font:600 13px ui-sans-serif,-apple-system,BlinkMacSystemFont,'PingFang SC',sans-serif;margin:16px 0}.settings-pane input,.settings-pane textarea{margin-top:7px;width:100%;border:1px solid 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