:root{--bg:#FFF9EC;--card:#FFFFFF;--soft:#F7EBCB;--yellow:#E9B92F;--green:#6A8247;--ink:#302718;--text:#514637;--muted:#746651;--line:#E7DCC4}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.78 system-ui,-apple-system,"Microsoft YaHei","PingFang SC",sans-serif;overflow-wrap:anywhere}img{display:block;max-width:100%;height:auto;object-fit:contain;object-position:center}a{color:#4b6236;text-underline-offset:3px}a:hover{color:#302718}button{font:inherit;cursor:pointer}a:focus-visible,button:focus-visible{outline:3px solid #6A8247;outline-offset:3px}h1,h2,h3{color:var(--ink);line-height:1.32;letter-spacing:.01em}h1{font-size:clamp(26px,3vw,34px);margin:0 0 20px}h2{font-size:clamp(21px,2.3vw,25px);margin:0 0 18px}h3{font-size:19px;margin:0 0 12px}p{margin:0 0 19px}.shell{max-width:1160px;margin-inline:auto;padding-inline:20px;min-width:0}.site-header{background:#fffdf8;border-bottom:1px solid 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