:root{--color-bg: #ffffff;--color-bg-alt: #f5f5f7;--color-bg-dark: #000000;--color-text: #1d1d1f;--color-text-secondary: #6e6e73;--color-text-inverse: #f5f5f7;--color-accent: #0071e3;--color-accent-hover: #0077ed;--color-border: #d2d2d7;--font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "SF Pro Text", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;--radius-sm: 8px;--radius-md: 12px;--radius-lg: 18px;--radius-pill: 980px;--shadow-card: 0 4px 30px rgba(0, 0, 0, .06);--shadow-card-hover: 0 12px 40px rgba(0, 0, 0, .1);--transition-base: .4s cubic-bezier(.28, .11, .32, 1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility}body{font-family:var(--font-family);font-size:17px;line-height:1.47;color:var(--color-text);background:var(--color-bg);overflow-x:hidden}a{color:var(--color-accent);text-decoration:none;transition:color var(--transition-base)}a:hover{color:var(--color-accent-hover);text-decoration:underline}img{display:block;max-width:100%}button{font-family:inherit;cursor:pointer;border:none;background:transparent}.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 22px;font-size:17px;font-weight:400;border-radius:var(--radius-pill);transition:all var(--transition-base);white-space:nowrap}.btn-primary{background:var(--color-accent);color:#fff}.btn-primary:hover{background:var(--color-accent-hover);color:#fff;text-decoration:none}.btn-ghost{color:var(--color-accent);background:transparent}.btn-ghost:hover{text-decoration:underline}.section{padding:120px 22px;position:relative;overflow:hidden}.section-alt{background:var(--color-bg-alt)}.section-dark{background:var(--color-bg-dark);color:var(--color-text-inverse)}.container{max-width:1040px;margin:0 auto}.container-wide{max-width:1280px;margin:0 auto}.eyebrow{display:block;font-size:14px;font-weight:600;letter-spacing:.02em;color:var(--color-accent);text-transform:uppercase;margin-bottom:12px}.headline{font-size:clamp(40px,6vw,72px);font-weight:600;letter-spacing:-.015em;line-height:1.08;margin-bottom:18px}.subhead{font-size:clamp(21px,2.4vw,28px);font-weight:400;line-height:1.25;color:var(--color-text-secondary);max-width:780px}.section-dark .subhead{color:#a1a1a6}.fade-in{opacity:0;transform:translateY(40px);transition:opacity .9s var(--transition-base),transform .9s var(--transition-base)}.fade-in.is-visible{opacity:1;transform:translateY(0)}@media (max-width: 768px){.section{padding:80px 20px}}