:root{--bg-main:#FFFFFF;--bg-surface:#F8FAFC;--bg-card-hover:#F1F5F9;--text-primary:#0F172A;--text-secondary:#475569;--color-accent:#2563EB;--color-accent-hover:#1D4ED8;--color-accent-secondary:#7C3AED;--border-subtle:rgba(0,0,0,0.08);--gradient-primary:linear-gradient(135deg,var(--color-accent) 0%,var(--color-accent-secondary) 100%);--gradient-text:linear-gradient(to right,var(--text-primary),#475569);--font-family-sans:'Inter',sans-serif;--container-max-width:1200px;--spacing-section-desktop:100px;--spacing-section-mobile:60px;--radius-md:12px;--radius-lg:16px;--radius-full:9999px;--transition-fast:0.2s cubic-bezier(0.4,0,0.2,1);--transition-normal:0.3s cubic-bezier(0.4,0,0.2,1);--transition-slow:0.5s ease-out;}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}html{scroll-behavior:smooth;}body{font-family:var(--font-family-sans);background-color:var(--bg-main);color:var(--text-primary);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;}img{max-width:100%;height:auto;display:block;}a{color:var(--color-accent);text-decoration:none;transition:color var(--transition-fast);}a:hover{color:var(--color-accent-hover);}h1,h2,h3,h4,h5,h6{line-height:1.2;margin-bottom:1rem;font-weight:700;color:var(--text-primary);}h1{font-size:clamp(2.5rem,5vw,4rem);font-weight:800;letter-spacing:-0.02em;}h2{font-size:clamp(2rem,4vw,3rem);letter-spacing:-0.01em;}h3{font-size:clamp(1.5rem,3vw,2rem);font-weight:600;}h4{font-size:clamp(1.25rem,2vw,1.5rem);font-weight:600;}p{margin-bottom:1.5rem;color:var(--text-secondary);}p:last-child{margin-bottom:0;}.text-gradient{background:var(--gradient-primary);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;display:inline-block;}.subtitle{font-size:clamp(1.125rem,2vw,1.25rem);font-weight:400;color:var(--text-secondary);max-width:60ch;}.container{max-width:var(--container-max-width);margin:0 auto;padding:0 24px;}@media (min-width:768px){.container{padding:0 40px;}}section{padding:var(--spacing-section-mobile) 0;}@media (min-width:768px){section{padding:var(--spacing-section-desktop) 0;}}.text-center{text-align:center;}.mb-2{margin-bottom:0.5rem;}.mb-4{margin-bottom:1rem;}.mb-8{margin-bottom:2rem;}.mt-8{margin-top:2rem;}.btn{display:inline-flex;align-items:center;justify-content:center;padding:0.875rem 1.75rem;font-size:1rem;font-weight:600;border-radius:var(--radius-full);transition:all var(--transition-fast);cursor:pointer;border:none;gap:0.5rem;}.btn-primary{background:var(--gradient-primary);color:#FFFFFF;box-shadow:0 4px 14px 0 rgba(37,99,235,0.3);}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 6px 20px rgba(37,99,235,0.4);color:#FFFFFF;}.btn-outline{background:transparent;color:var(--text-primary);border:2px solid var(--text-primary);}.btn-outline:hover{background:var(--text-primary);border-color:var(--text-primary);color:var(--bg-main);}.card{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:2rem;transition:all var(--transition-normal);}.card:hover{transform:translateY(-5px);background:var(--bg-card-hover);border-color:rgba(37,99,235,0.3);box-shadow:0 10px 30px -10px rgba(0,0,0,0.1);}.site-header{position:fixed;top:0;left:0;width:100%;z-index:100;transition:all var(--transition-fast);padding:0.85rem 0;}.site-header.scrolled{background:rgba(255,255,255,0.95);backdrop-filter:blur(12px);border-bottom:1px solid var(--border-subtle);padding:0.45rem 0;}.nav-container{display:flex;justify-content:space-between;align-items:center;}.logo{display:flex;align-items:center;}.logo img{height:34px;width:auto;}.nav-links{display:none;gap:2rem;}@media (min-width:768px){.nav-links{display:flex;align-items:center;}}.nav-links a{color:var(--text-secondary);font-weight:500;}.nav-links a:hover{color:var(--text-primary);}.fade-in-up{opacity:0;transform:translateY(20px);transition:opacity 0.6s ease-out,transform 0.6s ease-out;}.fade-in-up.visible{opacity:1;transform:translateY(0);}