:root{--bg:#F6FAFC;--paper:#fff;--wash:#EAF6FA;--wash2:#EDF4F8;--cyan:#25C8D1;--sky:#25B6E8;--blue:#1787DB;--navy:#174B78;--heading:#183A56;--text:#31485D;--sub:#687D8E;--line:#DCE9F0;--footer:#123653;--shadow:0 14px 40px rgba(23,75,120,.065)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;background:var(--bg);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--text);overflow-x:clip}a{color:inherit;text-decoration:none}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--blue);outline-offset:3px}img{max-width:100%;height:auto}h1,h2,h3,h4{color:var(--heading);line-height:1.36;margin:0 0 .65em}h1{font-size:clamp(27px,3.3vw,42px);letter-spacing:-.025em}h2{font-size:clamp(21px,2.2vw,27px)}h3{font-size:clamp(17px,1.55vw,21px)}p{margin:0 0 1.1em}ul,ol{padding-left:1.4em}.container{width:min(100% - 56px,1180px);margin-inline:auto}.section{padding:54px 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p:last-child{margin-bottom:0}.side-stack{display:grid;gap:18px}.split{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:44px}.split--reverse .media{order:-1}.mini-label{display:inline-block;font-size:12px;font-weight:700;border:1px solid #B9DFE8;color:#176680;border-radius:5px;padding:3px 9px;margin-bottom:12px}.note-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.note{padding:22px 24px;border-top:3px solid var(--cyan);background:#fff;border-radius:0 0 10px 10px}.note .number{font-size:13px;color:#147E9B;font-weight:700}.pathway{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;counter-reset:step}.pathway div{position:relative;border-top:2px solid #A8D9E5;padding:22px 18px 0 0}.pathway div:before{content:"";position:absolute;width:10px;height:10px;background:var(--blue);border:4px solid white;border-radius:50%;top:-11px;left:0}.pathway strong{display:block;color:var(--heading)}.pathway 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@media(max-width:760px){.section{padding:37px 0}.hero{padding:37px 0}.hero-grid,.split,.editor-grid,.content-shell{grid-template-columns:1fr}.hero-grid .media{grid-row:1}.side-stack{grid-template-columns:repeat(2,minmax(0,1fr))}.split--reverse .media{order:0}.sidebar{position:static}.quick-grid{grid-template-columns:1fr}.quick-group{gap:11px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.rich-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.note-list{grid-template-columns:1fr}.pathway{grid-template-columns:repeat(2,minmax(0,1fr));gap:15px}.footer-top{gap:26px}.related-links{grid-template-columns:1fr}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:40;background:#fff;border-top:1px solid var(--line);padding:6px 6px max(6px,env(safe-area-inset-bottom));box-shadow:0 -8px 26px rgba(20,62,88,.07)}.mobile-bottom a{text-align:center;padding:7px 2px;font-size:13px;font-weight:700;color:var(--navy);border-radius:5px}.mobile-bottom a[aria-current="page"]{background:var(--wash);color:#147EB3}body{padding-bottom:calc(62px + env(safe-area-inset-bottom))}.to-top{bottom:85px}.media--hero{height:220px}.media--feature{height:190px}.media--banner{height:155px}}
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@media(max-height:480px) and (max-width:760px){.mobile-bottom{position:static}body{padding-bottom:0}.to-top{bottom:20px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}