:root{--color-primary: #4f46e5;--color-primary-dark: #4338ca;--color-accent: #f59e0b;--color-bg: #ffffff;--color-card: #f8fafc;--color-text: #0f172a;--color-text-secondary: #475569;--color-border: #e2e8f0;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-16: 64px;--space-20: 80px;--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;--transition-fast: .2s ease;--transition-normal: .3s ease;--radius-sm: 6px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);font-size:16px;line-height:1.6;color:var(--color-text);background-color:var(--color-bg);overflow-x:hidden}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto}button{cursor:pointer;border:none;outline:none;font-family:inherit}ul{list-style:none}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--space-6)}@media(max-width:768px){.container{padding:0 var(--space-4)}}.section{padding:var(--space-16) 0}@media(max-width:768px){.section{padding:var(--space-12) 0}}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-2);padding:var(--space-3) var(--space-6);font-size:1rem;font-weight:600;border-radius:var(--radius-md);transition:all var(--transition-normal);white-space:nowrap;text-decoration:none}.btn-primary{background:var(--color-primary);color:#fff;box-shadow:0 4px 14px #4f46e54d}.btn-primary:hover{background:var(--color-primary-dark);transform:translateY(-1px)}.btn-lg{padding:var(--space-4) var(--space-8);font-size:1.125rem;border-radius:var(--radius-lg)}