:root{color-scheme:light;--bg: #ffffff;--panel: #ffffff;--panel-soft: #fafafa;--text: #111111;--muted: #6f6f6f;--line: #ebebeb;--line-strong: #dcdcdc;--accent: #111111;--accent-soft: #f4f4f4;--primary: #0f6fff;--danger: #b94236}*{box-sizing:border-box}html,body,#app{margin:0;min-height:100%;font-family:Noto Sans SC,Microsoft YaHei,sans-serif;background:var(--bg);color:var(--text)}body{line-height:1.5}button,input,textarea,select{font:inherit}a{color:inherit;text-decoration:none}.shell{display:grid;grid-template-columns:220px minmax(0,1fr);min-height:100vh;background:#fff}.sidebar{padding:28px 22px;border-right:1px solid var(--line);background:#fff}.brand-mark{font-size:22px;font-weight:700;letter-spacing:.02em}.brand-desc{margin-top:6px;font-size:12px;color:var(--muted)}.nav-group{margin-top:28px;display:grid;gap:4px}.nav-link{display:block;padding:12px 10px;border-radius:12px;color:#3c3c3c;transition:background .16s ease,color .16s 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