:root{--bg: #eef1f6;--surface: #ffffff;--surface-2: #f7f9fc;--ink: #172033;--ink-2: #3a465c;--muted: #6b7688;--line: #e2e7ef;--line-strong: #cdd5e1;--accent: #3b5bdb;--accent-weak: #eaefff;--accent-ink: #29409e;--good: #2f9e6f;--warn: #b4530a;--warn-weak: #fcefe1;--danger: #c0392b;--danger-weak: #fdecea;--radius: 12px;--radius-sm: 8px;--shadow-sm: 0 1px 2px rgba(20,30,50,.06), 0 1px 3px rgba(20,30,50,.05);--shadow-md: 0 4px 16px rgba(20,30,50,.08);--shadow-lg: 0 12px 40px rgba(20,30,50,.18);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif}*{box-sizing:border-box}html,body{margin:0;padding:0}body{font-family:var(--font);color:var(--ink);background:var(--bg);font-size:14px;line-height:1.5;-webkit-font-smoothing:antialiased}.app{max-width:1180px;margin:0 auto;padding:24px 20px 80px}.app>h1{font-size:22px;font-weight:700;letter-spacing:-.01em;margin:0 0 2px}.app>.muted{margin:0 0 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