:root{--background:#f5f7fb;--surface:#ffffff;--surface-muted:#f9fafc;--text:#111827;--muted:#657083;--border:#d7dde8;--border-strong:#b7c0ce;--accent:#173b68;--accent-strong:#0e2a4f;--accent-soft:#e8eef7;--danger:#a43b3b;--warning:#9a6a15;--success:#2f6d55;--shadow:0 18px 45px rgba(18,35,62,0.08);--radius:8px}*{box-sizing:border-box}html{min-width:320px;background:var(--background)}body{margin:0;color:var(--text);background:linear-gradient(180deg,#ffffff,#f5f7fb 46%,#eef2f8);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft YaHei,sans-serif;overflow-x:hidden}a{color:inherit}button,input{font:inherit}.app-shell{width:min(1440px,calc(100% - 48px));margin:0 auto;padding:28px 0 48px}.topbar{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;padding:6px 0 22px;border-bottom:1px solid var(--border)}.system-label{margin:0 0 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