:root{--ink:#14241d;--muted:#5d6e65;--brand:#087f5b;--brand2:#12a878;--lime:#dff8e9;--cream:#f7faf7;--line:#dfe9e3;--white:#fff;--shadow:0 18px 55px rgba(23,62,45,.12);--radius:22px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:#fff;line-height:1.72}a{color:inherit;text-decoration:none}img{max-width:100%}.container{width:min(1160px,calc(100% - 40px));margin:auto}.narrow{width:min(820px,calc(100% - 40px));margin:auto}.skip{position:absolute;left:-9999px}.skip:focus{left:18px;top:18px;z-index:99;background:#fff;padding:10px 14px;border-radius:8px}.header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(14px);border-bottom:1px solid 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/* 2026-09-08 full-site UI and content discoverability */
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