:root{--bg:#F6F8F8;--paper:#fff;--soft:#EAF0F2;--navy:#122E3B;--navy2:#1A4050;--teal:#168E96;--link:#226D9D;--heading:#193946;--ink:#374D58;--muted:#647981;--line:#D9E3E6;--footer:#0C2632}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font:16.5px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-wrap:break-word}a{color:var(--link);text-underline-offset:3px}a:hover{color:var(--teal)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #3ac3c7;outline-offset:3px}h1,h2,h3{color:var(--heading);line-height:1.35}h1{font-size:clamp(34px,3.2vw,42px);letter-spacing:-.02em;margin:0 0 18px}h2{font-size:26px;margin:0 0 18px}h3{font-size:19px;margin:0 0 10px}p{margin:0 0 16px}ul,ol{padding-left:1.5em}li+li{margin-top:8px}.wrap{max-width:1220px;margin-inline:auto;padding-inline:28px}.site-main{min-height:55vh}.site-main section{margin-block:54px}.site-main 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