:root{--color-brand:#2563EB;--color-brand-hover:#1D4ED8;--color-brand-active:#1E40AF;--color-brand-subtle:rgba(37, 99, 235, 0.1);--color-brand-muted:rgba(37, 99, 235, 0.05);--color-accent:#7C3AED;--color-accent-hover:#6D28D9;--color-accent-subtle:rgba(124, 58, 237, 0.1);--color-highlight:#F97316;--color-highlight-hover:#EA580C;--color-highlight-subtle:rgba(249, 115, 22, 0.1);--color-bg-primary:#FFFFFF;--color-bg-secondary:#F8FAFC;--color-bg-tertiary:#F1F5F9;--color-bg-quaternary:#E2E8F0;--color-bg-warm:#FFFBF5;--color-bg-warm-secondary:#FFF7ED;--color-bg-glass:rgba(255, 255, 255, 0.8);--color-bg-glass-border:rgba(255, 255, 255, 0.5);--color-text-primary:#0F172A;--color-text-secondary:#475569;--color-text-tertiary:#94A3B8;--color-text-quaternary:#CBD5E1;--color-text-inverse:#FFFFFF;--color-border:#E2E8F0;--color-border-subtle:#F1F5F9;--color-border-strong:#CBD5E1;--color-success:#10B981;--color-success-subtle:rgba(16, 185, 129, 0.1);--color-success-hover:#059669;--color-warning:#F59E0B;--color-warning-subtle:rgba(245, 158, 11, 0.1);--color-warning-hover:#D97706;--color-error:#EF4444;--color-error-subtle:rgba(239, 68, 68, 0.1);--color-error-hover:#DC2626;--color-info:#3B82F6;--color-info-subtle:rgba(59, 130, 246, 0.1);--color-info-hover:#2563EB;--gradient-hero:linear-gradient(135deg, #2563EB 0%, #0EA5E9 50%, #7C3AED 100%);--gradient-hero-subtle:linear-gradient(135deg, rgba(37, 99, 235, 0.08) 0%, rgba(14, 165, 233, 0.08) 50%, rgba(124, 58, 237, 0.08) 100%);--gradient-surface:linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);--gradient-border:linear-gradient(135deg, rgba(37, 99, 235, 0.3) 0%, rgba(124, 58, 237, 0.3) 100%);--gradient-warm:linear-gradient(135deg, #FFFBF5 0%, #FFF7ED 100%);--gradient-accent:linear-gradient(135deg, #7C3AED 0%, #EC4899 100%);--font-display:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-body:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;--font-mono:ui-monospace, "SF Mono", Monaco, "Cascadia Mono", "Segoe UI Mono", Consolas, monospace;--text-display:4rem;--text-h1:3rem;--text-h2:2.25rem;--text-h3:1.5rem;--text-h4:1.25rem;--text-body-large:1.125rem;--text-body:1rem;--text-small:0.875rem;--text-caption:0.75rem;--font-light:300;--font-regular:400;--font-medium:500;--font-semibold:600;--font-bold:700;--leading-tight:1.1;--leading-snug:1.3;--leading-normal:1.5;--leading-relaxed:1.7;--tracking-tight:-0.02em;--tracking-normal:0;--tracking-wide:0.02em;--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-sm:0.5rem;--radius-md:0.75rem;--radius-lg:1rem;--radius-xl:1.5rem;--radius-full:9999px;--shadow-none:none;--shadow-sm:0 1px 2px rgba(0, 0, 0, 0.05);--shadow-md:0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);--shadow-lg:0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);--shadow-xl:0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.05);--shadow-glow:0 0 20px rgba(37, 99, 235, 0.3);--z-base:0;--z-sticky:10;--z-dropdown:20;--z-overlay:30;--z-modal:40;--z-toast:50;--transition-fast:150ms cubic-bezier(0.25, 0.46, 0.45, 0.94);--transition-normal:250ms cubic-bezier(0.25, 0.46, 0.45, 0.94);--transition-slow:350ms cubic-bezier(0.25, 0.46, 0.45, 0.94);--transition-spring:400ms cubic-bezier(0.34, 1.56, 0.64, 1);--container-max:1400px;--container-narrow:800px;--section-padding-x:1.5rem;--section-padding-y:5rem}[data-theme=dark]{--color-brand:#0A84FF;--color-brand-hover:#409CFF;--color-brand-active:#0071E3;--color-brand-subtle:rgba(10, 132, 255, 0.15);--color-brand-muted:rgba(10, 132, 255, 0.08);--color-accent:#BF5AF2;--color-accent-hover:#D48BFF;--color-accent-subtle:rgba(191, 90, 242, 0.15);--color-highlight:#FF9F0A;--color-highlight-hover:#FFB340;--color-highlight-subtle:rgba(255, 159, 10, 0.15);--color-bg-primary:#1C1C1E;--color-bg-secondary:#2C2C2E;--color-bg-tertiary:#3A3A3C;--color-bg-quaternary:#48484A;--color-bg-glass:rgba(28, 28, 30, 0.8);--color-bg-glass-border:rgba(255, 255, 255, 0.1);--color-text-primary:#FFFFFF;--color-text-secondary:#EBEBF5;--color-text-tertiary:#8E8E93;--color-text-quaternary:#636366;--color-text-inverse:#000000;--color-border:rgba(84, 84, 88, 0.65);--color-border-subtle:rgba(84, 84, 88, 0.36);--color-border-strong:rgba(84, 84, 88, 0.8);--color-success:#30D158;--color-success-subtle:rgba(48, 209, 88, 0.15);--color-success-hover:#34C759;--color-warning:#FF9F0A;--color-warning-subtle:rgba(255, 159, 10, 0.15);--color-warning-hover:#FFB340;--color-error:#FF453A;--color-error-subtle:rgba(255, 69, 58, 0.15);--color-error-hover:#FF6961;--color-info:#0A84FF;--color-info-subtle:rgba(10, 132, 255, 0.15);--color-info-hover:#409CFF;--gradient-hero:linear-gradient(135deg, #0A84FF 0%, #5E5CE6 100%);--gradient-hero-subtle:linear-gradient(135deg, rgba(10, 132, 255, 0.12) 0%, rgba(94, 92, 230, 0.12) 100%);--gradient-surface:linear-gradient(135deg, #1C1C1E 0%, #2C2C2E 100%);--shadow-sm:0 1px 3px rgba(0, 0, 0, 0.5);--shadow-md:0 4px 8px rgba(0, 0, 0, 0.6);--shadow-lg:0 8px 16px rgba(0, 0, 0, 0.7);--shadow-xl:0 16px 32px rgba(0, 0, 0, 0.8);--shadow-glow:0 0 30px rgba(10, 132, 255, 0.3)}@media (min-width:640px){:root{--section-padding-x:2rem}}@media (min-width:768px){:root{--section-padding-x:2.5rem}}@media (min-width:1024px){:root{--section-padding-x:3rem;--text-display:4rem}}@media (min-width:1280px){:root{--section-padding-x:4rem}}