:root{--color-primary: #4A90D9;--color-primary-light: #6BA3E0;--color-primary-dark: #357ABD;--color-bg: #FAFBFC;--color-bg-card: #FFFFFF;--color-accent: #FFB800;--color-accent-light: #FFD54F;--color-text: #1F2937;--color-text-secondary: #6B7280;--color-text-muted: #9CA3AF;--color-border: #E5E7EB;--color-border-light: #F3F4F6;--color-success: #10B981;--color-error: #EF4444;--gradient-primary: linear-gradient(135deg, #4A90D9 0%, #6BA3E0 100%);--gradient-accent: linear-gradient(135deg, #FFB800 0%, #FFD54F 100%);--shadow-sm: 0 1px 2px rgba(0, 0, 0, .05);--shadow-md: 0 4px 12px rgba(0, 0, 0, .08);--shadow-lg: 0 12px 24px rgba(0, 0, 0, .12);--radius-sm: 6px;--radius-md: 12px;--radius-lg: 20px;--font-display: "Outfit", -apple-system, sans-serif;--font-body: "Noto Sans SC", -apple-system, sans-serif;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--space-3xl: 64px;--space-4xl: 96px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:var(--font-body);font-size:16px;line-height:1.6;color:var(--color-text);background-color:var(--color-bg);-webkit-font-smoothing:antialiased}h1,h2,h3,h4,h5,h6{font-family:var(--font-display);font-weight:700;line-height:1.2}h1{font-size:clamp(2.5rem,6vw,4rem)}h2{font-size:clamp(1.75rem,4vw,2.5rem)}h3{font-size:clamp(1.25rem,2.5vw,1.5rem)}p{margin-bottom:1rem;color:var(--color-text-secondary)}a{color:var(--color-primary);text-decoration:none;transition:color .2s}a:hover{color:var(--color-primary-dark)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:14px 28px;font-family:var(--font-display);font-size:1rem;font-weight:600;border:none;border-radius:var(--radius-md);cursor:pointer;transition:all .25s ease;text-decoration:none}.btn-primary{background:var(--gradient-primary);color:#fff;box-shadow:var(--shadow-md)}.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);color:#fff}.btn-secondary{background:#fff;color:var(--color-text);border:1px solid var(--color-border)}.btn-secondary:hover{background:var(--color-border-light);transform:translateY(-2px)}.btn-accent{background:var(--gradient-accent);color:#1f2937;box-shadow:var(--shadow-md)}.btn-accent:hover{transform:translateY(-2px);box-shadow:var(--shadow-lg);color:#1f2937}.btn-lg{padding:18px 36px;font-size:1.125rem}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--space-lg)}.section{padding:var(--space-4xl) 0}.section-dark{background:#0d1117;color:#fff}.section-dark h2,.section-dark p{color:#ffffffd9}@keyframes float{0%,to{transform:translateY(0)}50%{transform:translateY(-12px)}}@keyframes slideUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}.text-center{text-align:center}.text-primary{color:var(--color-primary)}.text-accent{color:var(--color-accent)}.text-muted{color:var(--color-text-muted)}.flex{display:flex}.flex-col{flex-direction:column}.items-center{align-items:center}.justify-center{justify-content:center}.justify-between{justify-content:space-between}.gap-sm{gap:var(--space-sm)}.gap-md{gap:var(--space-md)}.gap-lg{gap:var(--space-lg)}.gap-xl{gap:var(--space-xl)}.grid{display:grid}.grid-2{grid-template-columns:repeat(2,1fr)}.grid-3{grid-template-columns:repeat(3,1fr)}.grid-4{grid-template-columns:repeat(4,1fr)}@media(max-width:768px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr}.section{padding:var(--space-3xl) 0}}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-thumb{background:var(--color-border);border-radius:999px}::selection{background:var(--color-primary);color:#fff}