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(width>=1024px){:root{--font-size-section-title:1.75rem;--font-size-subsection-title:2.25rem}}html{font-family:var(--font-sans);color:var(--color-text);background:var(--color-background);text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font-sans);color:var(--color-text);font-size:16px;line-height:1.7}h1,h2,h3,h4,h5,h6{font-family:var(--font-sans);letter-spacing:-.02em;font-weight:700;line-height:1.2}h1{font-size:clamp(2.5rem,6vw,5rem)}h2{font-size:clamp(2rem,4vw,3.5rem)}h3{font-size:clamp(1.5rem,3vw,2.25rem)}h4{font-size:1.25rem}h5{font-size:1.125rem}h6{font-size:1rem}p{color:var(--color-text-secondary);font-size:1rem;line-height:1.8}small{color:var(--color-text-muted);font-size:.875rem;line-height:1.6}html[lang=zh-TW] body{letter-spacing:.01em}html[lang=ja] body{line-height:1.8}html[lang=en] 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