:root{--bg:#F6F8F8;--white:#fff;--soft:#EAF0F2;--navy:#122E3B;--deep:#1A4050;--teal:#168E96;--link:#226D9D;--heading:#193946;--body:#374D58;--muted:#647981;--line:#D9E3E6;--footer:#0C2632}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;background:var(--bg);color:var(--body);font:16px/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,summary:focus-visible{outline:3px solid var(--teal);outline-offset:3px}h1,h2,h3{color:var(--heading);line-height:1.3;letter-spacing:.01em}h1{font-size:clamp(34px,3.1vw,42px);margin:0 0 23px}h2{font-size:27px;margin:0 0 18px}h3{font-size:20px;margin:0 0 10px}p{margin:0 0 17px}ul,ol{padding-left:1.4em}li+li{margin-top:6px}.wrap{width:min(100% - 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