/* 开云体育：轻量体育刊物 */
:root{--bg:#F6F8F8;--paper:#fff;--pale:#EAF0F2;--navy:#122E3B;--panel:#1A4050;--teal:#168E96;--link:#226D9D;--head:#193946;--text:#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);font-family:Arial,'PingFang SC','Microsoft YaHei',sans-serif;color:var(--text);line-height:1.8;font-size:16px}a{color:var(--link);text-underline-offset:4px}a:hover{text-decoration-thickness:2px}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--teal);outline-offset:4px}h1,h2,h3{color:var(--head);line-height:1.35;letter-spacing:.01em}h1{font-size:clamp(34px,3.2vw,42px);margin:.2em 0 .55em}h2{font-size:27px;margin:0 0 20px}h3{font-size:20px;margin:0 0 10px}p{margin:0 0 1.15em}ul,ol{padding-left:1.35em}li+li{margin-top:.4em}.wrap{width:min(1220px,calc(100% - 56px));margin-inline:auto;min-width:0}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip-link{position:absolute;top:-70px;left:12px;z-index:50;background:white;padding:8px 15px}.skip-link:focus{top:8px}.site-header{background:var(--navy);color:#fff;position:relative;z-index:10}.topbar{display:flex;align-items:center;gap:19px;min-height:76px}.brand{display:flex;align-items:center;gap:7px;flex-shrink:0;max-width:210px;min-width:0;color:#fff;text-decoration:none}.brand img{display:block;width:auto;height:auto;max-height:38px;max-width:125px;object-fit:contain}.brand small{font-size:9px;line-height:1.25;letter-spacing:.085em;white-space:nowrap}.brand-fallback{font-size:18px}.desktop-nav{display:flex;align-items:center;justify-content:center;gap:clamp(7px,1.3vw,18px);flex:1;min-width:0}.desktop-nav a{white-space:nowrap;font-size:13px;color:#e5eff1;text-decoration:none;line-height:72px;border-bottom:3px solid transparent}.desktop-nav a[aria-current=page]{color:white;border-color:#65c7c8;font-weight:700}.desktop-nav a:hover{color:#8ee2e0}.entry-link{flex-shrink:0;background:#e5f5f3;color:#123f48;padding:6px 12px;border-radius:7px;font-size:13px;font-weight:bold;text-decoration:none;white-space:nowrap}.menu-toggle,.mobile-nav{display:none}.nojs-nav{display:none}.breadcrumbs{display:flex;gap:12px;font-size:13px;color:var(--muted);padding-block:17px 0}.breadcrumbs a{text-decoration:none}.page-intro{padding:49px 0 38px;border-bottom:1px solid var(--line)}.page-intro p{max-width:750px;font-size:17px}.eyebrow{color:var(--teal);font-size:12px;letter-spacing:.18em;font-weight:700;text-transform:uppercase}.lead{font-size:18px;color:#45606b}.section{padding:55px 0;border-bottom:1px solid var(--line)}.section:last-child{border-bottom:0}.section-heading{max-width:780px}.section-heading p{color:var(--muted)}.article{max-width:780px}.article p{line-height:1.84}.article h3{margin-top:27px}.narrow{max-width:720px}.hero{display:grid;grid-template-columns:minmax(0,1.38fr) minmax(0,1fr);align-items:center;gap:34px;padding:38px 0 45px;border-bottom:1px solid var(--line)}.hero p{max-width:650px}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:21px}.primary-link,.secondary-link{display:inline-block;text-decoration:none;padding:8px 16px;border-radius:7px;font-weight:bold;font-size:14px}.primary-link{background:var(--navy);color:#fff}.secondary-link{border:1px solid var(--teal);color:var(--head)}.image-holder{display:flex;align-items:center;justify-content:center;min-width:0;width:100%;padding:8px;margin:0;background:var(--pale);border-radius:12px}.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--banner{--image-limit:190px}.image-holder--portrait{--image-limit:330px;max-width:310px;margin-inline:auto}.image-note{font-size:13px;color:var(--muted);text-align:center;padding:6px}.topic-groups{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.topic-group{min-width:0;border-left:2px solid var(--teal);padding-left:17px}.topic-row{padding:0 0 20px}.topic-row+ .topic-row{padding-top:18px;border-top:1px solid var(--line)}.index-num{font-size:12px;color:var(--teal);font-weight:bold}.topic-row h3{margin:2px 0 6px}.topic-row p{font-size:14px;margin:0 0 5px}.feature-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:35px}.side-notes{border-left:1px solid var(--line);padding-left:24px}.side-notes h3{font-size:18px}.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:35px;align-items:center}.split--wide{grid-template-columns:minmax(0,1.2fr) minmax(0,.8fr)}.split>*,.feature-grid>*,.topic-groups>*{min-width:0}.soft-panel{background:var(--pale);border-radius:12px;padding:24px}.dark-panel{background:var(--panel);color:#eaf8fa;border-radius:12px;padding:28px}.dark-panel h2,.dark-panel h3{color:#fff}.steps{counter-reset:step;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;list-style:none;padding:0}.steps li{counter-increment:step;margin:0;padding:17px;border-top:2px solid var(--teal);background:white;border-radius:0 0 8px 8px}.steps li:before{content:'0' counter(step);display:block;font-size:13px;font-weight:bold;color:var(--teal);margin-bottom:8px}.steps h3{font-size:17px}.steps p{font-size:14px;margin:0}.callout{border-left:3px solid var(--teal);padding:14px 21px;background:var(--pale);margin:22px 0}.subnav{display:flex;flex-wrap:wrap;gap:9px 18px;padding:13px 0;border-bottom:1px solid var(--line);margin:16px 0 24px}.subnav a{font-size:14px}.editor-layout{display:grid;grid-template-columns:205px minmax(0,1fr);gap:35px}.editor-layout aside{align-self:start;position:sticky;top:25px;padding:18px;background:var(--pale);border-radius:8px}.editor-layout aside a{display:block;margin:9px 0;font-size:14px}.compare-table{width:100%;border-collapse:collapse;min-width:610px;background:white;font-size:15px}.compare-table caption{text-align:left;font-weight:bold;margin-bottom:12px;color:var(--head)}.compare-table th,.compare-table td{text-align:left;vertical-align:top;padding:13px 16px;border-bottom:1px solid var(--line)}.compare-table th{background:var(--pale);color:var(--head)}.table-scroll{overflow-x:auto;max-width:100%;border:1px solid var(--line);border-radius:8px}.table-scroll .compare-table{margin:0}.wide-article{max-width:950px;margin:auto}.wide-article .article{max-width:780px}.football-photo{max-width:1000px;margin:24px auto}.annotation{font-size:14px;color:var(--muted);border-block:1px solid var(--line);padding:14px 0;margin:25px 0}.concept-cols{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.concept-cols>section{padding:20px;border-top:3px solid var(--teal);background:white;min-width:0}.concept-cols h3{font-size:19px}.concept-cols p{font-size:15px}.analysis-band{padding:28px;margin:23px 0;border-radius:9px;background:var(--pale)}.analysis-band:nth-of-type(even){background:var(--panel);color:white}.analysis-band:nth-of-type(even) h3{color:white}.gallery-piece{display:grid;grid-template-columns:minmax(0,.88fr) minmax(0,1.12fr);gap:35px;align-items:center;margin:36px 0}.gallery-piece.reverse{grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr)}.gallery-piece.reverse .image-holder{order:2}.faq details{border-bottom:1px solid var(--line);padding:13px 0}.faq summary{cursor:pointer;font-weight:700;color:var(--head)}.faq details p{padding:10px 15px 0;margin:0}.guide-layout{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:35px}.guide-layout>*{min-width:0}.related{margin:45px 0 55px;padding:22px 25px;background:var(--pale);border-radius:10px}.related h2{font-size:20px;margin-bottom:10px}.related ul{display:flex;flex-wrap:wrap;gap:8px 28px;list-style:none;margin:0;padding:0}.related li{margin:0}.site-footer{margin-top:35px;background:var(--footer);color:#cfdee2;font-size:14px}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:70px;padding:38px 0 22px}.site-footer h2{font-size:18px;color:#fff;margin-bottom:11px}.footer-legal{font-size:12px;color:#a6bec5}.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:7px}.site-footer a{color:#e3f2f5}.footer-bottom{display:flex;justify-content:space-between;border-top:1px solid #34515c;padding:14px 0;font-size:12px}
@media(max-width:1180px){.topbar{gap:11px}.desktop-nav{gap:8px}.desktop-nav a{font-size:12px}.brand{max-width:175px}.brand img{max-width:100px}.entry-link{padding:6px 9px}}
@media(max-width:980px){.wrap{width:calc(100% - 44px)}.topbar{height:64px;min-height:64px;justify-content:space-between}.menu-toggle{display:grid;place-items:center;width:42px;height:42px;color:white;background:transparent;border:1px solid #58717b;border-radius:7px;cursor:pointer}.menu-bars{font-size:22px;line-height:1}.brand{max-width:none;margin-inline:auto}.brand img{max-height:30px;max-width:155px}.brand small{display:none}.desktop-nav{display:none}.mobile-nav{display:none;position:absolute;left:0;right:0;top:100%;background:#173b4a;box-shadow:0 8px 14px #081d2650}.mobile-nav.is-open{display:block}.mobile-nav-inner{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;padding-block:20px}.nav-group{display:flex;flex-direction:column;align-items:stretch;min-width:0}.nav-group>span{color:#91c7ce;font-size:12px;margin-bottom:5px}.nav-group a{color:#fff;padding:5px 0;text-decoration:none}.nav-group a[aria-current=page]{font-weight:bold;text-decoration:underline}.menu-close{background:transparent;border:1px solid #93abb4;color:white;padding:7px 12px;border-radius:5px;cursor:pointer}.nojs-nav{display:block;padding:10px 0}.nojs-nav summary{cursor:pointer}.nojs-nav nav{display:flex;flex-wrap:wrap;gap:5px 20px}.nojs-nav a{color:#fff}.editor-layout{grid-template-columns:170px minmax(0,1fr);gap:22px}}
@media(max-width:760px){.hero,.feature-grid,.split,.split--wide,.editor-layout,.guide-layout,.gallery-piece,.gallery-piece.reverse{grid-template-columns:1fr}.gallery-piece.reverse .image-holder{order:0}.editor-layout aside{position:static}.topic-groups{grid-template-columns:1fr;gap:0}.topic-group{border-left:0;padding-left:0;display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px;border-top:1px solid var(--line);padding-top:16px;margin-top:16px}.topic-row+.topic-row{padding:0;border:0}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.concept-cols{grid-template-columns:1fr}.side-notes{border-left:0;border-top:1px solid var(--line);padding:20px 0 0}.footer-grid{grid-template-columns:1fr;gap:18px}.hero .image-holder{max-width:100%}}
@media(max-width:640px){.wrap{width:calc(100% - 32px)}body{font-size:15px}h1{font-size:28px}h2{font-size:22px}h3{font-size:18px}.page-intro{padding:30px 0 25px}.page-intro p,.lead{font-size:16px}.hero{padding:29px 0}.section{padding:36px 0}.soft-panel,.dark-panel{padding:18px}.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--banner{--image-limit:125px}.image-holder--portrait{--image-limit:275px;max-width:240px}.topic-group{grid-template-columns:1fr;gap:12px}.topic-row+.topic-row{border-top:1px solid var(--line);padding-top:13px}.steps{grid-template-columns:1fr 1fr;gap:9px}.steps li{padding:12px}.mobile-nav-inner{grid-template-columns:1fr;gap:10px;max-height:70vh;overflow-y:auto}.entry-link{font-size:12px;padding:6px 9px}.brand img{max-width:125px}.brand-fallback{font-size:16px}.footer-bottom{gap:14px;flex-wrap:wrap}}
@media(max-width:390px){.steps{grid-template-columns:1fr}.brand img{max-width:105px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
