:root{--bg:#f6f7fb;--surface:#fff;--surface2:#f0f3f8;--text:#17213d;--muted:#758099;--border:#e5e9f0;--primary:#586cff;--shadow:0 14px 40px rgba(24,39,75,.08)}html.dark{--bg:#10131a;--surface:#181c25;--surface2:#222734;--text:#f4f7ff;--muted:#aab2c3;--border:#303746;--primary:#7f91ff;--shadow:0 18px 55px rgba(0,0,0,.35)}*{box-sizing:border-box}html,body{margin:0;min-height:100%}body{background:var(--bg);color:var(--text);font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;transition:background .25s,color .25s}a{text-decoration:none;color:inherit}.page-container{min-height:calc(100vh - 68px)}button,input,select{font:inherit}.theme-panel{border:1px solid var(--border);background:var(--surface);color:var(--text);border-radius:14px;padding:14px;box-shadow:var(--shadow);width:170px}.theme-panel label{display:block;padding:8px 0}.theme-button{border:0;background:var(--surface2);color:var(--text);width:38px;height:38px;border-radius:10px}