:root{--color-brand-primary:#2EA04E;--color-brand-primary-light:#3FBF60;--color-brand-primary-dark:#238B3E;--color-brand-cta:#44B244;--color-brand-cta-hover:#3DA03D;--color-bg-primary:#1D1D1D;--color-bg-secondary:#2D2D2D;--color-bg-card:#3D3D3D;--color-bg-card-light:#4D4D4D;--color-bg-elevated:#5D5D5D;--color-text-primary:#F5F5F5;--color-text-secondary:#D0D0E0;--color-text-muted:#9898A8;--color-text-disabled:#6E6E7E;--color-text-inverse:#1D1D1D;--color-success:#2EA04E;--color-success-bg:rgba(46,160,78,0.15);--color-error:#E05050;--color-error-bg:rgba(224,80,80,0.15);--color-warning:#FBBF24;--color-warning-bg:rgba(251,191,36,0.15);--color-info:#5399F9;--color-info-bg:rgba(83,153,249,0.15);--color-difficulty-beginner:#2EA04E;--color-difficulty-intermediate:#44B244;--color-difficulty-advanced:#E05050;--color-difficulty-expert:#8B5CF6;--color-border-hard:#000000;--color-border-soft:rgba(255,255,255,0.1);--color-border-focus:#2EA04E;--color-glow-primary:rgba(46,160,78,0.4);--color-glow-cta:rgba(68,178,68,0.5);--color-glow-error:rgba(224,80,80,0.3);--color-platform-wechat:#07C160;--color-platform-qq:#12B7F5;--color-platform-alipay:#1677FF;--spacing-0:0;--spacing-1:2px;--spacing-2:4px;--spacing-3:6px;--spacing-4:8px;--spacing-5:12px;--spacing-6:16px;--spacing-8:24px;--spacing-10:32px;--spacing-12:40px;--spacing-16:48px;--spacing-20:64px;--spacing-24:96px;--radius-none:0;--radius-sm:2px;--radius-md:4px;--radius-lg:6px;--radius-full:9999px;--shadow-inset:inset -2px -2px 0 rgba(0,0,0,0.3),inset 2px 2px 0 rgba(255,255,255,0.1);--shadow-inset-hover:inset -2px -2px 0 rgba(0,0,0,0.3),inset 2px 2px 0 rgba(255,255,255,0.15),0 0 12px rgba(46,160,78,0.4);--shadow-block:4px 4px 0 rgba(0,0,0,0.5);--shadow-block-hover:6px 6px 0 rgba(0,0,0,0.5);--shadow-glow:0 0 12px rgba(46,160,78,0.4);--font-heading:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-body:"Noto Sans SC",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--font-mono:"JetBrains Mono","Monaco","Menlo",monospace;--text-2xs:10px;--text-xs:12px;--text-sm:14px;--text-base:16px;--text-md:18px;--text-lg:20px;--text-xl:24px;--text-2xl:28px;--text-3xl:32px;--text-4xl:40px;--text-5xl:52px;--font-normal:400;--font-medium:500;--font-semibold:600;--font-bold:700;--font-extrabold:800;--leading-none:1;--leading-tight:1.25;--leading-snug:1.375;--leading-normal:1.5;--leading-relaxed:1.625;--leading-loose:1.8;--duration-instant:0ms;--duration-fast:150ms;--duration-normal:200ms;--duration-slow:300ms;--duration-slower:500ms;--ease-linear:linear;--ease-default:ease;--ease-in:ease-in;--ease-out:ease-out;--ease-in-out:ease-in-out;--ease-bounce:cubic-bezier(0.68,-0.55,0.265,1.55);--z-base:1;--z-raised:10;--z-dropdown:100;--z-sticky:200;--z-overlay:300;--z-modal:400;--z-popover:500;--z-tooltip:600;--z-toast:1000}