:root{--font-sans:ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,Arial,"Noto Sans","Apple Color Emoji","Segoe UI Emoji";--font-mono:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,"Liberation Mono","Courier New",monospace;--font-weight-regular:400;--font-weight-medium:500;--font-weight-semibold:600;--font-weight-bold:700;--text-xs:0.75rem;--text-sm:0.875rem;--text-md:1rem;--text-lg:1.125rem;--text-xl:1.25rem;--text-2xl:1.5rem;--text-3xl:1.875rem;--text-4xl:2.25rem;--leading-tight:1.2;--leading-normal:1.5;--leading-relaxed:1.7;--space-0:0;--space-1:0.25rem;--space-2:0.5rem;--space-3:0.75rem;--space-4:1rem;--space-5:1.25rem;--space-6:1.5rem;--space-8:2rem;--space-10:2.5rem;--space-12:3rem;--space-16:4rem;--space-20:5rem;--radius-xs:6px;--radius-sm:10px;--radius-md:12px;--radius-lg:14px;--radius-xl:16px;--radius-pill:999px;--border-1:1px;--border-2:2px;--shadow-sm:0 1px 2px var(--shadow-color-1);--shadow-md:0 8px 24px var(--shadow-color-2);--shadow-lg:0 18px 60px var(--shadow-color-3);--ease-out:cubic-bezier(0.16,1,0.3,1);--ease-in-out:cubic-bezier(0.65,0,0.35,1);--dur-1:120ms;--dur-2:180ms;--dur-3:260ms;--container-max:1240px;--container-pad:1.25rem;--header-h:72px;--z-base:0;--z-sticky:10;--z-dropdown:20;--z-modal:30;--z-toast:40;--brand-500:#2f6bff;--brand-600:#2458db;--brand-700:#1c45b0;--accent-500:#00c2ff;--accent-600:#00a6da;--success-500:#22c55e;--warning-500:#f59e0b;--danger-500:#ef4444;--info-500:#38bdf8;--focus-ring:0 0 0 3px var(--focus-color);--btn-h:44px;--btn-pad-x:16px;--btn-radius:var(--radius-md);--input-h:44px;--input-radius:var(--radius-md);--card-radius:var(--radius-lg);--card-pad:var(--space-6)}:root[data-theme=light]{--bg:#0b1220;--page-bg:#f7f8fb;--surface-0:#f7f8fb;--surface-1:#ffffff;--surface-2:#f1f3f8;--surface-3:#e9edf6;--text-1:#0b1220;--text-2:#2a3550;--text-3:#536287;--border:rgba(11,18,32,0.12);--link:var(--brand-600);--link-hover:var(--brand-700);--focus-color:rgba(47,107,255,0.35);--focus:var(--brand-600);--shadow-color-1:rgba(11,18,32,0.08);--shadow-color-2:rgba(11,18,32,0.12);--shadow-color-3:rgba(11,18,32,0.16);--hero-grad-1:rgba(47,107,255,0.18);--hero-grad-2:rgba(0,194,255,0.12);--btn-primary-bg:var(--brand-600);--btn-primary-bg-hover:var(--brand-700);--btn-primary-fg:#ffffff;--btn-ghost-bg:transparent;--btn-ghost-bg-hover:rgba(47,107,255,0.08);--btn-ghost-fg:var(--brand-700);--input-bg:#ffffff;--input-fg:var(--text-1);--input-placeholder:rgba(83,98,135,0.8);--input-border:var(--border);--scrollbar-size:10px;--scrollbar-thumb:rgba(20,40,60,0.28);--scrollbar-thumb-hover:rgba(20,40,60,0.42);--scrollbar-track:rgba(20,40,60,0.1);--scrollbar-corner:transparent}:root[data-theme=dark]{--page-bg:#070b14;--surface-0:#070b14;--surface-1:#0b1220;--surface-2:#0f1930;--surface-3:#152243;--text-1:#eef2ff;--text-2:#c9d3f2;--text-3:#93a4d6;--border:rgba(238,242,255,0.12);--link:#8fb0ff;--link-hover:#b9ccff;--focus-color:rgba(143,176,255,0.35);--focus:#8fb0ff;--shadow-color-1:rgba(0,0,0,0.35);--shadow-color-2:rgba(0,0,0,0.45);--shadow-color-3:rgba(0,0,0,0.55);--hero-grad-1:rgba(47,107,255,0.22);--hero-grad-2:rgba(0,194,255,0.16);--btn-primary-bg:#3a74ff;--btn-primary-bg-hover:#2f6bff;--btn-primary-fg:#071023;--btn-ghost-bg:transparent;--btn-ghost-bg-hover:rgba(143,176,255,0.14);--btn-ghost-fg:#dbe6ff;--input-bg:rgba(255,255,255,0.04);--input-fg:var(--text-1);--input-placeholder:rgba(147,164,214,0.8);--input-border:var(--border);--scrollbar-size:10px;--scrollbar-thumb:rgba(255,255,255,0.18);--scrollbar-thumb-hover:rgba(255,255,255,0.28);--scrollbar-track:rgba(255,255,255,0.07);--scrollbar-corner:transparent}body,html{padding:0;margin:0;font-family:var(--font-sans);background:var(--page-bg);color:var(--text-1);line-height:var(--leading-normal)}a{color:var(--link);text-decoration:none}a:hover{color:var(--link-hover);text-decoration:underline}*{box-sizing:border-box}:focus-visible{outline:none;box-shadow:var(--focus-ring);border-radius:8px}.u-container{width:100%;max-width:var(--container-max);margin:0 auto;padding-left:var(--container-pad);padding-right:var(--container-pad)}