:root{--font-sans:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;--weight-regular:400;--weight-medium:500;--weight-semibold:600;--weight-bold:700;--text-display:2.75rem;--text-heading:1.5rem;--text-subheading:1.125rem;--text-body:1rem;--text-secondary:.9375rem;--text-caption:.8125rem;--leading-tight:1.15;--leading-heading:1.28;--leading-body:1.7;--leading-compact:1.55;--tracking-tight:-.02em;--tracking-label:.06em;--space-2xs:.5rem;--space-xs:.75rem;--space-sm:1rem;--space-md:1.5rem;--space-lg:2rem;--space-xl:3rem;--color-canvas:#f4f6f8;--color-surface:#fff;--color-surface-muted:#f8fbff;--color-surface-soft:hsla(0,0%,100%,.78);--color-surface-overlay:hsla(0,0%,100%,.82);--color-surface-tint:#f7f9fc;--color-text-strong:#0f172a;--color-text-body:#334155;--color-text-muted:#5b6577;--color-text-subtle:#64748b;--color-border-soft:#e2e8f0;--color-border-accent:#dbe4f3;--color-border-accent-soft:rgba(37,99,235,.1);--color-accent:#2563eb;--color-accent-strong:#1d4ed8;--color-accent-soft:#eff6ff;--color-accent-wash:#dbeafe;--color-success-soft:#dcfce7;--color-success-strong:#166534;--color-danger-soft:#fee2e2;--color-danger-strong:#b91c1c;--color-neutral-soft:#e2e8f0;--color-neutral-soft-strong:#eef2f7;--color-neutral-strong:#475569;--shadow-card:0 8px 24px rgba(15,23,42,.05);--shadow-sticky:16px 0 18px -18px rgba(15,23,42,.28);--radius-card:20px;--radius-panel:16px;--radius-pill:999px;--space-section:clamp(1.5rem,2.4vw,2rem);--space-section-loose:clamp(2rem,4vw,3rem);--space-card:clamp(1.375rem,2.2vw,1.875rem);--space-card-compact:clamp(1.125rem,2vw,1.375rem);--space-stack-tight:.75rem;--space-stack:1rem;--space-stack-loose:1.5rem;--hero-background:linear-gradient(180deg,#fbfcfe,#f7f9fc);--accent-background:#f5f8fd;--accent-bar:var(--color-accent)}body{background:var(--color-canvas);color:var(--color-text-strong);font-family:var(--font-sans);font-feature-settings:"kern" 1;font-kerning:normal;font-size:var(--text-body);line-height:var(--leading-compact);margin:0;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased}*{box-sizing:border-box}a{color:inherit}@media(max-width:720px){:root{--text-display:2.25rem;--text-heading:1.375rem;--text-subheading:1.0625rem;--text-secondary:.9rem;--text-caption:.875rem}}