:root{color-scheme:light;--bg:#F6F8F8;--white:#fff;--soft:#EAF0F2;--navy:#122E3B;--panel:#1A4050;--accent:#168E96;--link:#226D9D;--heading:#193946;--text:#374D58;--muted:#647981;--line:#D9E3E6;--footer:#0C2632}
*{box-sizing:border-box}html{scroll-padding-top:94px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.8 Arial,"PingFang SC","Microsoft YaHei",sans-serif;overflow-wrap:break-word}a{color:var(--link);text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:#0a777e}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #16acb6;outline-offset:4px}img{max-width:100%;height:auto}h1,h2,h3{color:var(--heading);line-height:1.34;letter-spacing:-.02em}h1{font-size:clamp(34px,3vw,42px);margin:0 0 23px}h2{font-size:27px;margin:0 0 20px}h3{font-size:20px;margin:0 0 12px}p{margin:0 0 18px}ul,ol{padding-left:1.5em}li+li{margin-top:8px}.wrap{width:min(100% - 56px,1220px);margin-inline:auto}.skip-link{position:absolute;top:-80px;left:18px;padding:9px 15px;background:#fff;z-index:30}.skip-link:focus{top:12px}.site-header{background:var(--navy);color:#fff;position:relative;z-index:10}.header-inner{max-width:1220px;margin:auto;padding:0 16px;height:76px;display:flex;align-items:center;gap:16px;min-width:0}.brand{flex:0 1 auto;min-width:0;display:flex;align-items:center;gap:9px;color:#fff;text-decoration:none;white-space:nowrap}.brand img{display:block;width:auto;height:auto;max-height:38px;max-width:154px;object-fit:contain}.brand span{font-size:10px;letter-spacing:.09em;color:#bbd2d7}.brand-fallback{font-size:18px;color:#fff}.desktop-navigation{display:flex;justify-content:center;align-items:center;flex:1;gap:clamp(7px,1.1vw,17px);min-width:0}.desktop-navigation a{color:#d5e4e7;text-decoration:none;font-size:clamp(12px,.94vw,14px);white-space:nowrap;border-bottom:2px solid transparent;padding:7px 0;font-weight:500}.desktop-navigation a.active{color:#fff;font-weight:700;border-bottom-color:#50cad0}.desktop-navigation a:hover{color:#fff}.register-link{white-space:nowrap;color:#fff;text-decoration:none;background:var(--accent);font-size:13px;font-weight:700;padding:8px 13px;border-radius:8px}.register-link:hover{color:#fff;background:#0b7c84}.mobile-navigation{display:none}.breadcrumb{display:flex;gap:12px;align-items:center;padding-top:21px;font-size:13px;color:var(--muted)}.breadcrumb a{text-decoration:none}main{padding:34px 0 80px;min-height:55vh}.breadcrumb+main{padding-top:24px}.eyebrow{color:var(--accent);font-size:12px;letter-spacing:.13em;font-weight:700;text-transform:uppercase;margin-bottom:10px}.lead{font-size:18px;line-height:1.8;color:#425d68;max-width:790px}.hero{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(0,1fr);gap:38px;align-items:center;background:var(--white);padding:38px;border:1px solid var(--line);border-radius:14px}.hero p{max-width:670px}.hero-actions,.inline-links{display:flex;gap:12px 22px;flex-wrap:wrap;margin-top:19px}.action-link{padding:10px 16px;border:1px solid var(--accent);border-radius:8px;text-decoration:none;font-weight:700}.action-link.primary{background:var(--navy);color:#fff;border-color:var(--navy)}section.section{margin-top:58px}.section-heading{border-bottom:1px solid var(--line);padding-bottom:15px;margin-bottom:23px}.section-heading p{max-width:760px}.two-col{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:34px;align-items:start}.two-third{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:40px;align-items:start}.panel{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:26px}.soft-panel{background:var(--soft);border-radius:12px;padding:25px}.dark-panel{background:var(--panel);color:#e8f4f5;border-radius:12px;padding:29px}.dark-panel h2,.dark-panel h3{color:white}.dark-panel a{color:#a4e6ed}.route-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;background:var(--line);border:1px solid var(--line);border-radius:12px;overflow:hidden}.route-group{background:#fff;padding:21px}.route-item{padding:10px 0}.route-item+.route-item{border-top:1px solid var(--line)}.route-item small{display:block;color:var(--accent);font-weight:700}.route-item a{font-weight:700;font-size:18px}.route-item p{font-size:14px;margin:5px 0}.reading-stages{counter-reset:stages;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.reading-stages>div{border-top:3px solid var(--accent);padding:18px;background:white}.reading-stages>div:before{counter-increment:stages;content:'0' counter(stages);display:block;color:var(--accent);font-weight:700;font-size:13px}.image-holder{display:flex;align-items:center;justify-content:center;min-width:0;width:100%;padding:8px;background:var(--soft);border-radius:12px;margin:0}.image-holder img{display:block;width:auto;height:auto;max-width:100%;max-height:var(--image-limit,210px);object-fit:contain;object-position:center}.image-holder--hero{--image-limit:290px}.image-holder--feature{--image-limit:240px}.image-holder--inline{--image-limit:180px}.image-holder--rules{--image-limit:210px}.image-holder--wide{--image-limit:190px}.image-holder--portrait{--image-limit:330px;max-width:310px;margin-inline:auto}.image-holder--tall{max-width:350px;margin-inline:auto}.image-missing{background:var(--soft);border-left:3px solid var(--accent);padding:9px 13px;border-radius:4px;font-size:13px;color:var(--muted);margin:4px 0}.page-intro{padding:20px 0 28px;border-bottom:1px solid var(--line);margin-bottom:35px}.page-intro p{max-width:830px}.page-intro--dark{background:var(--navy);padding:34px;border-radius:12px;margin-bottom:35px}.page-intro--dark h1,.page-intro--dark p{color:white}.page-intro--dark .eyebrow{color:#80dfe5}.article{max-width:780px}.article p{line-height:1.82}.article 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table{border-collapse:collapse;width:100%;min-width:610px;text-align:left}.table-scroll caption{caption-side:top;text-align:left;font-weight:700;padding:13px 17px;color:var(--heading)}.table-scroll th,.table-scroll td{padding:13px 17px;border-top:1px solid var(--line);vertical-align:top}.table-scroll th{background:var(--soft);color:var(--heading)}.table-scroll thead th{border-top:0}.steps{counter-reset:step;list-style:none;padding:0;border-left:2px solid var(--accent);margin-left:12px}.steps li{position:relative;padding:6px 0 25px 28px}.steps li:before{counter-increment:step;content:counter(step);position:absolute;left:-15px;top:6px;background:var(--accent);color:white;width:28px;height:28px;border-radius:50%;text-align:center;font-size:14px;line-height:28px}.steps li strong{display:block;color:var(--heading)}.concept-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.concept-grid>div{padding:22px;border-top:3px solid var(--accent);background:white}.concept-grid 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details[open]{border-color:#90b8bc}.directory{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.directory a{padding:16px;background:white;border:1px solid var(--line);border-radius:8px;text-decoration:none}.directory a strong{display:block}.directory a span{font-size:14px;color:var(--muted)}.site-footer{background:var(--footer);color:#bed2d7;padding:48px 0 24px}.footer-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px}.footer-brand{color:white;font-size:22px;font-weight:700}.footer-brand small{font-size:11px;letter-spacing:.1em;margin-left:10px;color:#a7c4cb}.site-footer h2{font-size:17px;color:white}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:5px 15px}.footer-links a{color:#d8e8eb;text-decoration:none;font-size:14px}.footer-links a.active{text-decoration:underline;font-weight:700}.footer-bottom{border-top:1px solid #36515b;margin-top:28px;padding-top:18px;font-size:13px}.quote{font-size:19px;color:var(--heading);padding:12px 22px;border-left:4px solid var(--accent);margin:25px 0}.measure{max-width:780px}.mini-columns{columns:2;column-gap:45px}.mini-columns p{break-inside:avoid}
@media(max-width:1180px){.brand span{display:none}.header-inner{gap:12px}.desktop-navigation{gap:10px}.register-link{padding:8px 10px}}
@media(max-width:980px){.header-inner{height:64px;justify-content:space-between;padding-inline:22px}.desktop-navigation{display:none}.mobile-navigation{display:block;position:static;order:0}.brand{order:1;margin-inline:auto}.brand img{max-height:30px;max-width:150px}.brand span{display:inline;font-size:9px}.register-link{order:2}.mobile-navigation summary{list-style:none;cursor:pointer;min-width:42px;min-height:42px;display:flex;align-items:center;justify-content:center;color:white;border:1px solid #58737c;border-radius:8px}.mobile-navigation summary::-webkit-details-marker{display:none}.hamburger{font-size:21px;line-height:1}.mobile-links{position:absolute;top:100%;left:0;right:0;background:#fff;color:var(--heading);box-shadow:0 12px 18px #122e3b20;border-top:1px solid var(--line);padding:18px max(22px,calc((100vw - 1220px)/2));max-height:calc(100vh - 65px);overflow-y:auto}.mobile-menu-top{display:flex;align-items:center;justify-content:space-between}.menu-close{background:var(--soft);border:1px solid var(--line);border-radius:7px;padding:7px 12px;color:var(--heading);cursor:pointer}.menu-group{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:7px;margin-top:14px}.menu-group>span{grid-column:1/-1;font-size:12px;font-weight:700;color:var(--muted)}.menu-group a{border:1px solid var(--line);border-radius:6px;padding:8px 10px;color:var(--heading);text-decoration:none}.menu-group a.active{font-weight:700;border-color:var(--accent);text-decoration:underline}.wrap{width:calc(100% - 44px)}.hero{gap:22px;padding:25px}.sports-layout{grid-template-columns:175px minmax(0,1fr);gap:26px}}
@media(max-width:760px){body{font-size:16px}.hero,.two-col,.two-third,.alternating,.sports-layout,.footer-grid{grid-template-columns:minmax(0,1fr)}.hero{padding:23px}.concept-grid,.route-groups{grid-template-columns:minmax(0,1fr)}.reading-stages{grid-template-columns:repeat(2,minmax(0,1fr))}.side-index{position:static;border-left:0;border-bottom:1px solid var(--line);padding:0 0 16px}.side-index a{display:inline-block;margin-right:15px}.related-grid{grid-template-columns:minmax(0,1fr)}section.section{margin-top:40px}.mini-columns{columns:1}.alternating .image-holder{order:0}}
@media(max-width:640px){body{font-size:15px;line-height:1.78}.wrap{width:calc(100% - 32px)}.header-inner{padding-inline:16px;gap:7px}.brand span{display:none}.register-link{font-size:12px;padding:7px 9px}.brand img{max-width:120px}.mobile-links{padding:14px 16px}.menu-group{grid-template-columns:minmax(0,1fr)}.menu-group a{padding:9px 11px}main{padding:24px 0 48px}h1{font-size:28px}h2{font-size:22px}h3{font-size:19px}.lead{font-size:16px}.hero{padding:18px}.panel,.soft-panel,.dark-panel{padding:19px}.route-group{padding:17px}.directory{grid-template-columns:1fr}.reading-stages{grid-template-columns:1fr 1fr;gap:9px}.reading-stages>div{padding:12px}.image-holder--hero{--image-limit:195px}.image-holder--feature{--image-limit:180px}.image-holder--inline{--image-limit:140px}.image-holder--rules{--image-limit:165px}.image-holder--wide{--image-limit:125px}.image-holder--portrait{--image-limit:275px;max-width:240px}.chapter{margin-top:29px}.page-intro--dark{padding:22px}.footer-grid{gap:22px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}