:root{--bg:#F6F8F8;--paper:#fff;--soft:#EAF0F2;--navy:#122E3B;--deep:#1A4050;--accent:#168E96;--link:#226D9D;--heading:#193946;--text:#374D58;--muted:#647981;--line:#D9E3E6;--footer:#0C2632}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;font:16.5px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--text);background:var(--bg);overflow-wrap:break-word}a{color:var(--link);text-underline-offset:4px}a:hover{color:var(--accent)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #37aeb4;outline-offset:3px}img{max-width:100%}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--heading);line-height:1.35}h1{font-size:clamp(2.1rem,3.1vw,2.62rem);letter-spacing:-.025em}h2{font-size:clamp(1.5rem,2.2vw,1.75rem)}h3{font-size:1.16rem}p{margin-bottom:1.05em}ul,ol{padding-left:1.4em}.container{width:min(100% - 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@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}