*{margin:0;padding:0;box-sizing:border-box}:root{--color-background: #ffffff;--color-text-primary: #1a1a1a;--color-text-secondary: #666666;--color-border: #e5e5e5;--color-hover: #f8f9fa;--font-primary: "Open Sans", system-ui, -apple-system, sans-serif;--spacing-xs: .5rem;--spacing-sm: 1rem;--spacing-md: 2rem;--spacing-lg: 4rem;--spacing-xl: 6rem}body{margin:0;font-family:var(--font-primary);color:var(--color-text-primary);background-color:var(--color-background);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font-family:inherit;cursor:pointer}.header{position:fixed;top:0;left:0;right:0;background-color:#fffc;backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid rgba(0,0,0,.1);z-index:1000}.header-container{max-width:1400px;margin:0 auto;padding:var(--spacing-sm) 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