:root{--bg:#FFF9EC;--card:#fff;--soft:#F6EFD9;--main:#E9B92F;--green:#6A8247;--title:#302718;--text:#514637;--muted:#746651;--line:#E7DCC4}*{box-sizing:border-box}html{overflow-x:hidden}body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;line-height:1.78;overflow-x:hidden;padding-bottom:0}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline}button,a{min-height:44px}.shell{width:min(1160px,calc(100% - 40px));margin:auto;min-width:0}.site-header{position:sticky;top:0;z-index:30;background:rgba(255,249,236,.97);border-bottom:1px solid var(--line)}.header-row{height:70px;display:flex;align-items:center;gap:24px}.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--title);white-space:nowrap}.brand-logo{height:28px;width:auto;max-width:120px;object-fit:contain}.desktop-nav{margin-left:auto;display:flex;gap:4px;align-items:center}.desktop-nav 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