:root{color-scheme:light;--bg: #f6f7fb;--surface: #ffffff;--ink: #172033;--muted: #667085;--line: #e4e9f2;--primary: #4f46e5;--primary-dark: #332e9b;--teal: #0f9f85;--danger: #c2410c;--shadow: 0 16px 42px rgba(24, 39, 75, .09);font-family:-apple-system,BlinkMacSystemFont,Segoe UI,PingFang SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}*:focus-visible{outline:2px solid var(--primary);outline-offset:2px}body{margin:0;min-height:100vh;background:linear-gradient(180deg,rgba(79,70,229,.07),rgba(15,159,133,.04) 45%,transparent),var(--bg);color:var(--ink)}button,input,select,textarea{font:inherit}button{border:0;cursor:pointer}.shell{width:min(100%,760px);min-height:100vh;margin:0 auto;padding:env(safe-area-inset-top) 14px calc(22px + env(safe-area-inset-bottom))}.shell.home-shell{padding-bottom:calc(22px + env(safe-area-inset-bottom))}.topbar{position:sticky;top:0;z-index:20;display:grid;grid-template-columns:48px 1fr auto;gap:10px;align-items:center;margin:0 -14px;padding:12px 14px 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