:root{color-scheme:light;--text: #1a1a1a;--text-secondary: #555;--text-tertiary: #888;--accent: #2563eb;--accent-hover: #1d4ed8;--border: #e5e5e5;--bg: #fff;--bg-card: #fff;--bg-card-hover: #fafbff;--font: "Helvetica Neue", Helvetica, Arial, sans-serif}*{box-sizing:border-box;margin:0;padding:0}html{-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{font-family:var(--font);font-size:15px;line-height:1.6;color:var(--text);background:var(--bg)}a{color:inherit;text-decoration:none}.container{max-width:680px;margin:0 auto;padding:0 24px}main{padding:80px 0 120px}.nav{border-bottom:1px solid var(--border)}.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:20px 0}.nav-links{display:flex;gap:24px;font-size:14px;color:var(--text-secondary)}.nav-links a:hover{color:var(--accent)}.section{padding:48px 0;border-bottom:1px solid 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