:root{--ink: #1f2a24;--ink-soft: #4a574f;--paper: #f7f5ef;--paper-2: #ffffff;--brand: #1f6f54;--brand-deep: #14493a;--accent: #b3402f;--line: #e3ded2;--radius: 14px;--maxw: 720px;--shadow: 0 6px 24px rgba(20, 73, 58, .08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Noto Serif SC","Source Han Serif SC",Songti SC,Georgia,serif;color:var(--ink);background:var(--paper);line-height:1.75;font-size:17px;-webkit-font-smoothing:antialiased}a{color:var(--brand);text-decoration:none}a:hover{color:var(--accent)}.container{max-width:1080px;margin:0 auto;padding:0 20px}.reading{max-width:var(--maxw);margin:0 auto;padding:0 20px}.site-header{position:sticky;top:0;z-index:50;background:#f7f5efeb;backdrop-filter:saturate(160%) blur(8px);border-bottom:1px solid var(--line)}.site-header .container{display:flex;align-items:center;justify-content:space-between;height:62px;gap:16px}.brand{font-weight:700;font-size:19px;color:var(--brand-deep);white-space:nowrap}.brand 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