:root{--red: #C0392B;--red-light: #FDECEA;--red-mid: #E8746A;--ink: #1A1A1A;--ink-2: #444;--ink-3: #888;--paper: #FAFAF8;--paper-2: #F2F1ED;--paper-3: #E8E6DF;--white: #FFFFFF;--green: #1D7A55;--green-light: #E3F4EC;--serif: "Noto Serif SC", serif;--sans: "Noto Sans SC", sans-serif;--mono: "DM Mono", monospace;--radius: 10px;--radius-sm: 6px}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:var(--sans);background:var(--paper);color:var(--ink);font-size:15px;line-height:1.7;min-height:100vh;display:flex;flex-direction:column}nav{position:sticky;top:0;z-index:100;background:#fafaf8eb;backdrop-filter:blur(12px);border-bottom:1px solid var(--paper-3);padding:0 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