/* KAIYUN SPORTS — standalone responsive editorial design */
:root{--page:#f6fafc;--white:#fff;--tint:#eaf6fa;--tint2:#edf4f8;--cyan:#25c8d1;--sky:#25b6e8;--blue:#1787db;--navy:#174b78;--head:#183a56;--text:#31485d;--muted:#687d8e;--border:#dce9f0;--footer:#123653;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:36px}body{margin:0;background:var(--page);color:var(--text);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-x:hidden}body.drawer-open{overflow:hidden}a{color:var(--navy);text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:var(--blue)}button,a,summary{ -webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid var(--cyan);outline-offset:4px}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--head);line-height:1.38}h1{font-size:clamp(32px,3.15vw,42px);letter-spacing:-.04em}h2{font-size:26px}h3{font-size:20px}p{margin-bottom:1.12em}ul,ol{padding-left:1.45em}li+li{margin-top:.5em}.container{max-width:calc(var(--max) + 56px);padding:0 28px;margin:0 auto}.section{margin-top:56px;margin-bottom:56px}.eyebrow{display:block;font-size:12px;line-height:1.4;letter-spacing:.15em;font-weight:700;color:#117f9c;margin-bottom:13px;text-transform:uppercase}.muted{color:var(--muted)}.lead{font-size:17px;line-height:1.82;color:var(--text)}.section-heading{max-width:780px;margin-bottom:24px}.section-heading p{color:var(--muted)}.skip-link{position:absolute;left:12px;top:-70px;z-index:100;background:#fff;padding:10px 15px}.skip-link:focus{top:10px}.site-header{background:#fff;border-bottom:1px solid var(--border)}.topbar{height:72px;display:flex;align-items:center;gap:20px}.brand{display:flex;align-items:center;text-decoration:none;min-width:0}.brand-logo{display:block;width:auto;height:auto;max-height:38px;max-width:240px;object-fit:contain}.brand-fallback{font-size:23px;font-weight:800;color:var(--head);white-space:nowrap;line-height:1.1}.brand-fallback small{display:block;font-size:9px;letter-spacing:.14em;color:var(--blue);font-weight:700}.topbar-tagline{margin:0 auto;color:var(--muted);font-size:14px}.entry-button{display:inline-flex;justify-content:center;align-items:center;min-height:42px;padding:0 22px;border-radius:8px;background:linear-gradient(115deg,#1787db,#1da4c7);font-size:14px;font-weight:700;color:white;text-decoration:none;white-space:nowrap}.entry-button:hover{background:#174b78;color:#fff}.desktop-nav{background:var(--navy)}.nav-inner{display:flex;justify-content:space-between;align-items:stretch;gap:12px;min-height:48px}.nav-inner>a{display:flex;align-items:center;padding:9px 8px;text-decoration:none;color:#edfaff;font-size:14px;white-space:nowrap;border-bottom:3px solid transparent}.nav-inner>a:hover,.nav-inner>a[aria-current=page]{color:#fff;border-bottom-color:var(--cyan);font-weight:700}.menu-toggle{display:none}.drawer-overlay,.mobile-drawer{display:none}.mobile-bottom{display:none}.back-to-top{position:fixed;bottom:28px;right:24px;width:44px;height:44px;z-index:20;border:1px solid var(--border);border-radius:50%;color:var(--navy);background:white;box-shadow:0 7px 24px #12365318;opacity:0;pointer-events:none;transition:opacity .2s}.back-to-top.is-visible{opacity:1;pointer-events:auto}.hero{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);align-items:center;gap:42px;padding:48px 0 30px}.hero h1{margin-bottom:20px}.hero-copy p{max-width:610px}.action-links{display:flex;gap:12px;flex-wrap:wrap;margin-top:24px}.action-links a{display:inline-flex;align-items:center;min-height:44px;padding:8px 17px;border:1px solid var(--border);border-radius:8px;background:#fff;text-decoration:none;font-weight:700;font-size:14px}.action-links a:first-child{background:var(--navy);color:#fff;border-color:var(--navy)}.action-links a:first-child:hover{background:var(--blue)}.media{display:flex;justify-content:center;align-items:center;width:100%;min-width:0;overflow:hidden;background:var(--tint);border-radius:14px;border:1px solid var(--border);padding:12px}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media--hero{height:clamp(250px,26vw,330px)}.media--feature{height:250px}.media--card{height:170px}.media--banner{height:220px}.media--mobile{height:350px;max-width:320px}.media--portrait:not(.media--mobile){max-width:350px;margin-left:auto;margin-right:auto}.media--wide{padding:6px}.media-placeholder{display:block;width:72%;height:66%;border:1px solid #cbe3ed;border-radius:12px;background:linear-gradient(135deg,#eaf6fa,#dceef6)}.quickbar{display:flex;align-items:center;flex-wrap:wrap;gap:8px 26px;background:#fff;border:1px solid var(--border);padding:14px 20px;border-radius:10px}.quickbar-group{display:flex;gap:11px;align-items:center;flex-wrap:wrap;font-size:13px}.quickbar-group strong{color:var(--head)}.quickbar-group a{color:var(--muted)}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.topic-card{display:flex;flex-direction:column;gap:8px;background:white;border:1px solid var(--border);border-radius:12px;padding:20px 21px;min-width:0;text-decoration:none;transition:border-color .2s,transform .2s}.topic-card:hover{border-color:var(--sky);transform:translateY(-2px)}.topic-card strong{font-size:18px;color:var(--head)}.topic-card span{font-size:14px;line-height:1.7;color:var(--muted)}.topic-card em{font-size:13px;font-style:normal;color:var(--blue);margin-top:auto}.editorial-grid{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:18px}.feature-story,.side-stories article,.panel,.note-card{background:#fff;border:1px solid var(--border);border-radius:12px;padding:25px}.feature-story{background:var(--tint);padding:28px}.side-stories{display:grid;gap:18px}.story-kicker{font-size:12px;letter-spacing:.1em;font-weight:700;color:#168ba6}.feature-story h3{font-size:25px;margin:12px 0}.side-stories h3{font-size:19px}.text-link{font-weight:700}.split-feature{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:36px}.split-feature.reverse .media{order:-1}.split-feature .copy{min-width:0}.rule-intros{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.rule-intros article{border-top:3px solid var(--cyan);padding:21px 0 8px}.rule-intros article:nth-child(2){border-top-color:var(--blue)}.rule-intros article:nth-child(3){border-top-color:var(--navy)}.reading-path{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;counter-reset:step}.reading-path>div{background:#fff;border:1px solid var(--border);padding:18px;border-radius:10px}.reading-path span{font-size:12px;font-weight:700;color:var(--blue);letter-spacing:.08em}.reading-path strong{display:block;margin:9px 0;color:var(--head)}.reading-path p{font-size:14px;margin:0}.editor-note{font-size:14px;padding:18px 22px;background:var(--tint2);border-left:3px solid var(--sky);border-radius:4px}.page-intro{padding:44px 0 12px;max-width:880px}.page-intro h1{font-size:36px;margin-bottom:14px}.page-intro p{font-size:17px;max-width:850px}.article-shell{max-width:780px}.wide-content{max-width:var(--max)}.prose p{line-height:1.84}.prose h2{margin-top:35px}.prose h3{margin-top:25px}.section-band{padding:30px;background:#fff;border:1px solid var(--border);border-radius:12px}.comparison{overflow-x:auto;border:1px solid var(--border);border-radius:10px;background:#fff}.comparison table{width:100%;min-width:580px;border-collapse:collapse;font-size:15px}.comparison th,.comparison td{text-align:left;vertical-align:top;border-bottom:1px solid var(--border);padding:14px 16px}.comparison thead th{background:var(--navy);color:white;font-size:14px}.comparison tbody tr:last-child td,.comparison tbody tr:last-child th{border-bottom:0}.comparison tbody th{background:#f0f7fb;color:var(--head);font-weight:700;white-space:nowrap}.steps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.steps article{padding:23px;background:#fff;border:1px solid var(--border);border-radius:10px}.step-num{font-size:12px;font-weight:bold;color:#1689ae;letter-spacing:.08em}.steps h3{margin:9px 0}.steps p:last-child{margin-bottom:0}.feature-row{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:30px}.feature-row>*{min-width:0}.article-with-aside{display:grid;grid-template-columns:minmax(0,760px) minmax(0,240px);gap:42px;align-items:start}.aside-box{background:var(--tint);padding:22px;border:1px solid var(--border);border-radius:12px}.aside-box h2{font-size:20px}.aside-box dl{margin:0}.aside-box dt{font-weight:700;color:var(--head);margin-top:13px}.aside-box dd{margin:0;color:var(--muted);font-size:14px}.matrix{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.matrix article{background:white;padding:23px;border:1px solid var(--border);border-radius:12px;min-width:0}.matrix article h3{margin-bottom:12px}.matrix article p{font-size:15px}.matrix strong{color:var(--head)}.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.gallery figure{margin:0;padding:14px;background:#fff;border:1px solid var(--border);border-radius:12px}.gallery figure figcaption{padding:16px 8px 4px}.gallery figcaption strong{display:block;color:var(--head);font-size:19px;margin-bottom:6px}.gallery figcaption p{font-size:14px;margin:0}.archive-list{display:grid;gap:12px}.archive-list a{padding:17px 20px;border:1px solid var(--border);border-radius:9px;background:#fff;text-decoration:none;display:flex;justify-content:space-between;gap:15px;font-weight:700}.archive-list a:hover{border-color:var(--cyan)}.toc{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0 24px}.toc a{background:#fff;border:1px solid var(--border);border-radius:8px;padding:9px 14px;font-weight:700;font-size:14px;text-decoration:none}.faq{border-top:1px solid var(--border)}.faq details{border-bottom:1px solid var(--border);padding:0;background:#fff}.faq summary{position:relative;padding:17px 44px 17px 20px;list-style:none;cursor:pointer;font-weight:700;color:var(--head)}.faq summary::-webkit-details-marker{display:none}.faq summary:after{content:'+';font-size:23px;font-weight:400;position:absolute;right:18px;top:9px;color:var(--blue)}.faq details[open] summary:after{content:'−'}.faq-answer{padding:0 20px 18px;font-size:15px}.faq-answer p{margin:0}.related-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.related-links a{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:19px;background:#fff;border:1px solid var(--border);border-radius:10px;text-decoration:none;font-weight:700}.related-links a span{color:var(--blue)}.related-links a:hover{border-color:var(--sky)}.site-footer{background:var(--footer);color:#eaf7ff;padding:45px 0 24px;margin-top:70px}.site-footer a{color:#eaf7ff}.site-footer a:hover{color:#82ecf0}.footer-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:70px}.footer-brand{font-size:23px;font-weight:800;color:white}.footer-brand span{font-size:11px;letter-spacing:.12em;margin-left:9px;color:#a9dbe9}.footer-grid p{max-width:530px;font-size:14px;color:#d3e7f1}.footer-grid h2{font-size:16px;color:white}.footer-links{display:flex;flex-wrap:wrap;gap:7px 18px;font-size:14px}.footer-bottom{border-top:1px solid #42647b;margin-top:28px;padding-top:18px;display:flex;justify-content:space-between;gap:24px;font-size:12px;color:#d1e5ef}.footer-bottom p{margin:0}.accent-panel{background:var(--tint);padding:26px;border-radius:12px}.mini-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.mini-list>div{background:white;border:1px solid var(--border);border-radius:10px;padding:18px}.mini-list strong{display:block;color:var(--head)}.mini-list p{margin:7px 0 0;font-size:14px}.service-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.service-links a{background:#fff;border:1px solid var(--border);border-radius:9px;padding:16px;text-decoration:none}.service-links strong{display:block;color:var(--head)}.service-links span{color:var(--muted);font-size:14px}
@media(max-width:980px){.container{padding-left:22px;padding-right:22px}.topbar{height:64px}.menu-toggle{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:5px;flex:none;width:40px;height:40px;padding:0;background:#fff;border:1px solid var(--border);border-radius:8px}.menu-toggle span{display:block;width:19px;height:2px;background:var(--navy)}.brand{margin:0 auto}.brand-logo{max-height:30px;max-width:min(33vw,190px)}.brand-fallback{font-size:20px}.topbar-tagline,.desktop-nav{display:none}.entry-button{min-height:39px;padding:0 14px}.drawer-overlay{display:block;position:fixed;inset:0;z-index:90;background:#112d49a6;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.mobile-drawer{display:block;position:fixed;top:0;left:0;bottom:0;width:min(86vw,344px);max-width:100%;overflow-y:auto;z-index:91;background:#fff;transform:translateX(-105%);visibility:hidden;pointer-events:none;transition:transform .22s,visibility .22s;box-shadow:12px 0 28px #0001}.drawer-open .drawer-overlay{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .mobile-drawer{transform:none;visibility:visible;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 19px;border-bottom:1px solid var(--border);font-weight:700;color:var(--head)}.drawer-close{font-size:29px;line-height:1;background:#fff;border:0;color:var(--navy);width:40px;height:40px}.drawer-group{padding:16px 20px 10px;border-bottom:1px solid var(--border)}.drawer-group strong{display:block;font-size:13px;color:var(--muted);margin-bottom:7px}.drawer-group a{display:block;text-decoration:none;padding:8px 0;font-weight:700}.hero{gap:24px}.article-with-aside{grid-template-columns:minmax(0,1fr) 210px;gap:24px}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:760px){.hero{grid-template-columns:1fr;padding-top:28px}.hero .media{order:-1}.editorial-grid,.split-feature,.feature-row,.article-with-aside,.footer-grid{grid-template-columns:1fr}.split-feature.reverse .media{order:0}.steps,.matrix,.rule-intros{grid-template-columns:1fr 1fr}.gallery{grid-template-columns:1fr 1fr}.reading-path{grid-template-columns:1fr 1fr}.related-links{grid-template-columns:1fr}.page-intro{padding:34px 0 6px}.page-intro h1{font-size:30px}.footer-grid{gap:25px}.footer-bottom{flex-direction:column;gap:10px}}
@media(max-width:640px){body{font-size:15px;line-height:1.77}.container{padding:0 16px}.section{margin-top:35px;margin-bottom:35px}h1{font-size:29px}h2{font-size:22px}h3{font-size:18px}.page-intro h1{font-size:27px}.page-intro p,.lead{font-size:15px}.hero{padding:22px 0 0}.hero .media{margin-bottom:8px}.media--hero{height:200px}.media--feature{height:180px}.media--card{height:145px}.media--banner{height:150px}.media--mobile{height:290px;max-width:250px}.quickbar{padding:13px;gap:9px}.quickbar-group{gap:9px}.topic-grid,.steps,.matrix,.rule-intros,.gallery,.reading-path,.mini-list,.service-links{grid-template-columns:1fr}.topic-card,.feature-story,.side-stories article,.panel,.note-card{padding:18px}.feature-story h3{font-size:21px}.section-band{padding:18px}.comparison th,.comparison td{padding:11px 12px}.site-footer{margin-top:45px;padding-bottom:95px}.mobile-bottom{position:fixed;display:grid;grid-template-columns:repeat(4,1fr);bottom:0;left:0;right:0;z-index:30;background:#fff;border-top:1px solid var(--border);padding-bottom:env(safe-area-inset-bottom,0px);box-shadow:0 -6px 20px #1236530a}.mobile-bottom a{height:54px;display:flex;align-items:center;justify-content:center;text-decoration:none;font-size:13px;color:var(--muted);font-weight:700}.mobile-bottom a[aria-current=page]{color:var(--navy);border-top:3px solid var(--cyan)}.back-to-top{bottom:calc(73px + env(safe-area-inset-bottom,0px));right:16px}.footer-bottom{font-size:12px}.topbar{gap:10px}.entry-button{font-size:12px;padding:0 10px}.brand-logo{max-width:32vw}.brand-fallback{font-size:16px}.brand-fallback small{font-size:8px}}
@media(max-height:460px) and (max-width:640px){.mobile-bottom{position:static;padding-bottom:0}.back-to-top{bottom:15px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}