:root{--bg:#F4F7FA;--white:#fff;--soft:#EAF1F6;--mint:#E9F8F8;--nav:#102E46;--dark:#163C57;--teal:#13B8C5;--blue:#237BD3;--title:#18364B;--body:#344C60;--muted:#64798A;--line:#DCE6ED;--footer:#0B2539;--foottext:#DCECF5}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif;font-size:16px;line-height:1.8;overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:#126ca2;text-decoration:none}a:hover{text-decoration:underline}a:focus-visible,button:focus-visible,summary:focus-visible,.table-scroll:focus-visible{outline:3px solid var(--teal);outline-offset:3px}img{max-width:100%}h1,h2,h3{line-height:1.38;color:var(--title);margin:0 0 .65em}h1{font-size:36px}h2{font-size:27px}h3{font-size:20px}p{margin:0 0 1.15em}strong{color:var(--title)}.container{width:min(100% - 56px,1200px);margin:auto}.reading{max-width:800px}.section{margin:60px auto}.section-tight{margin:42px 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img{display:block;width:auto;height:auto;max-width:100%;max-height:var(--media-limit,220px);object-fit:contain;object-position:center}.media-frame--logo{--media-limit:38px}.media-frame--hero{--media-limit:310px}.media-frame--feature{--media-limit:250px}.media-frame--card{--media-limit:185px}.media-frame--wide{--media-limit:210px}.media-frame--mobile{--media-limit:350px;max-width:320px}.media-frame--missing{min-height:86px;color:#6b8394;font-size:13px;border:1px dashed #c9d9e4}.topic-directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 32px;border-top:1px solid var(--line)}.topic{padding:20px 0;border-bottom:1px solid var(--line)}.topic h3{margin-bottom:7px}.topic p{font-size:15px;margin-bottom:7px}.editorial-grid{display:grid;grid-template-columns:2fr 1fr;gap:20px}.feature-story{background:white;border:1px solid var(--line);padding:26px;border-radius:12px}.story-stack{display:grid;gap:20px}.story-small{background:var(--soft);padding:20px;border-radius:12px}.feature-story h3,.story-small h3{margin-bottom:12px}.split{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}.split.wide-text{grid-template-columns:42fr 58fr}.split.reverse{grid-template-columns:58fr 42fr}.split>*{min-width:0}.band{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:48px 0}.dark-band{background:var(--dark);color:#e4f0f7;padding:40px;border-radius:14px}.dark-band h2,.dark-band h3{color:#fff}.rule-tiles{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;align-items:start}.rule-tiles article{padding:22px;background:#fff;border:1px solid var(--line);border-radius:12px}.rule-tiles article:nth-child(2){margin-top:20px}.rule-tiles article:nth-child(3){margin-top:40px}.path-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;counter-reset:step}.path-steps article{border-top:3px solid var(--teal);padding:16px;background:#fff}.path-steps article::before{counter-increment:step;content:'0' counter(step);display:block;color:#168895;font-weight:bold;margin-bottom:8px}.note{border-left:4px solid var(--teal);padding:18px 22px;background:var(--mint);border-radius:0 9px 9px 0}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 245px;gap:36px}.article-layout article,.article-layout aside{min-width:0}.article-section{padding:24px 0;border-bottom:1px solid var(--line)}.article-section:first-child{padding-top:0}.article-section h2{margin-bottom:18px}.fact-aside{background:white;padding:22px;border:1px solid var(--line);border-radius:12px;align-self:start}.fact-aside ul{padding-left:20px;margin:0}.table-scroll{overflow-x:auto;max-width:100%;background:white;border:1px solid var(--line);border-radius:10px;margin:22px 0}table{width:100%;border-collapse:collapse;min-width:580px;line-height:1.6;font-size:15px}caption{text-align:left;padding:16px 18px;background:#eaf1f6;color:var(--title);font-weight:700}th,td{padding:14px 16px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}th{background:#f5f9fc;color:var(--title)}tr:last-child td{border-bottom:0}.number-steps{list-style:none;counter-reset:steps;padding:0}.number-steps li{counter-increment:steps;padding:15px 15px 15px 58px;position:relative;border-bottom:1px solid var(--line)}.number-steps li::before{content:counter(steps);position:absolute;left:0;top:14px;width:36px;height:36px;background:var(--nav);border-radius:50%;color:white;text-align:center;line-height:36px;font-weight:bold}.matrix{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.matrix article{border:1px solid var(--line);border-top:4px solid 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@media(max-width:370px){.register-link{padding:7px;font-size:12px}.brandbar-inner{grid-template-columns:40px minmax(0,1fr) auto;gap:4px}.hero-actions a{font-size:13px;padding:9px 12px}.path-steps{grid-template-columns:1fr}}
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