/* KAIYUN SPORTS — self-contained editorial design */
:root{--bg:#F6FAFC;--surface:#fff;--tint:#EAF6FA;--tint2:#EDF4F8;--teal:#25C8D1;--sky:#25B6E8;--blue:#1787DB;--navy:#174B78;--ink:#183A56;--body:#31485D;--muted:#687D8E;--line:#DCE9F0;--footer:#123653;--shadow:0 12px 35px rgba(27,75,107,.055)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;color:var(--body);background:var(--bg);font:16px/1.8 Arial,'PingFang SC','Microsoft YaHei',sans-serif;overflow-x:hidden}a{color:var(--navy);text-decoration-thickness:1px;text-underline-offset:4px}a:hover{color:var(--blue)}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--sky);outline-offset:3px}button{font:inherit;cursor:pointer}h1,h2,h3,h4{color:var(--ink);line-height:1.4;margin:0 0 18px;letter-spacing:-.025em}h1{font-size:clamp(27px,3.5vw,42px);line-height:1.34}h2{font-size:clamp(21px,2.4vw,27px)}h3{font-size:clamp(18px,2vw,21px)}p{margin:0 0 18px}ul,ol{padding-left:1.45em}li{margin:0 0 9px}.wrap{max-width:1180px;margin:auto;padding-left:28px;padding-right:28px}.skip-link{position:absolute;left:12px;top:-80px;z-index:100;background:#fff;padding:8px}.skip-link:focus{top:8px}.site-header{background:white;border-bottom:1px solid var(--line)}.header-top{height:72px;display:flex;align-items:center;gap:28px}.brand{display:inline-flex;align-items:center;color:var(--navy);font-size:24px;font-weight:800;text-decoration:none;min-width:0}.brand img{display:block;max-height:38px;max-width:230px;height:auto;width:auto;object-fit:contain}.header-note{font-size:13px;letter-spacing:.17em;color:var(--muted);margin-left:auto}.entry-link{margin-left:auto;text-decoration:none;white-space:nowrap;background:var(--navy);color:white;padding:8px 23px;border-radius:9px;font-size:14px;font-weight:700}.header-note+.entry-link{margin-left:0}.entry-link:hover{background:#226999;color:white}.primary-nav{background:var(--navy)}.nav-inner{display:flex;gap:0;align-items:stretch;justify-content:space-between;min-height:48px}.nav-inner a{color:#F2FBFF;font-size:14px;font-weight:600;padding:10px 13px;text-decoration:none;border-bottom:3px solid transparent;white-space:nowrap}.nav-inner a:hover,.nav-inner a[aria-current=page]{color:white;background:rgba(255,255,255,.08);border-color:var(--teal)}.menu-toggle{display:none}.mobile-drawer,.drawer-backdrop{display:none}.site-main{padding-top:44px;padding-bottom:72px}.hero{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);align-items:center;gap:46px;background:linear-gradient(115deg,#fff,#eef8fb);border:1px solid var(--line);border-radius:20px;padding:38px 42px}.eyebrow{display:inline-flex;text-transform:uppercase;letter-spacing:.13em;font-weight:800;font-size:12px;color:#18788a;margin-bottom:16px}.hero p{max-width:620px}.hero h1{max-width:620px}.hero-actions{display:flex;flex-wrap:wrap;gap:13px;margin-top:27px}.btn{display:inline-block;padding:10px 22px;border-radius:9px;background:var(--navy);color:#fff;text-decoration:none;font-size:14px;font-weight:700}.btn:hover{background:#236994;color:white}.btn--soft{background:#E0F3F8;color:var(--navy)}.btn--soft:hover{background:#CFECF3;color:var(--navy)}.media{display:flex;align-items:center;justify-content:center;min-width:0;width:100%;overflow:hidden;background:var(--tint);border-radius:14px}.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{max-width:350px;margin-inline:auto}.media--wide{background:#f0f6f9}.media--placeholder{border:1px dashed #D6E8ED;background:linear-gradient(135deg,#EAF6FA,#F8FBFD)}.placeholder-mark{width:58px;height:58px;border:2px solid #CEDFE8;border-radius:15px;transform:rotate(-8deg)}.section{margin-top:58px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:23px}.section-heading h2{margin-bottom:6px}.section-heading p{margin:0;max-width:690px}.kicker{font-size:12px;text-transform:uppercase;letter-spacing:.14em;color:#168b9c;font-weight:800}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:15px}.topic-card{padding:22px 22px 18px;background:white;border:1px solid var(--line);border-radius:13px;box-shadow:var(--shadow);text-decoration:none;display:flex;flex-direction:column;min-height:173px}.topic-card:nth-child(2),.topic-card:nth-child(6){background:#EDF8FA}.topic-card strong{color:var(--ink);font-size:18px;margin:0 0 8px}.topic-card span{color:var(--muted);font-size:14px;line-height:1.65}.topic-card small{margin-top:auto;padding-top:10px;color:var(--blue);font-weight:700}.topic-card:hover{border-color:var(--teal);transform:translateY(-2px)}.feature-2to1{display:grid;grid-template-columns:minmax(0,1.55fr) minmax(0,.85fr);gap:17px}.feature-main{background:var(--navy);color:#EAF7FF;border-radius:15px;padding:34px}.feature-main h3{color:white;font-size:25px}.feature-main a{color:#B9FAFF}.feature-stack{display:grid;gap:17px}.feature-mini{background:white;border:1px solid var(--line);border-radius:14px;padding:23px}.feature-mini h3{margin-bottom:8px}.feature-mini p{font-size:15px}.split{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:center}.split--reverse .split-visual{order:-1}.prose{max-width:780px}.prose p{line-height:1.84}.text-link{font-weight:700;color:#127aa8}.text-link::after{content:' ↗'}.rule-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:17px}.rule-tile{padding:25px;border-top:3px solid var(--teal);background:white;border-radius:0 0 13px 13px}.rule-tile h3{font-size:19px}.timeline{display:flex;gap:0;counter-reset:steps}.timeline>div{flex:1;min-width:0;border-top:2px solid var(--sky);padding:20px 18px 0;position:relative}.timeline>div::before{counter-increment:steps;content:counter(steps);display:grid;place-items:center;position:absolute;top:-17px;left:14px;width:30px;height:30px;border-radius:50%;background:var(--navy);color:white;font-size:13px;font-weight:700}.timeline h3{font-size:17px}.notice{background:#EAF6FA;border-left:4px solid var(--teal);border-radius:0 12px 12px 0;padding:20px 24px}.quick-row{margin-bottom:18px;padding:12px 18px;background:white;border:1px solid var(--line);border-radius:12px;display:flex;flex-wrap:wrap;gap:9px 20px;font-size:14px}.quick-row strong{color:var(--ink)}.quick-row a{white-space:nowrap}.page-intro{max-width:880px;padding-top:4px;margin-bottom:34px}.page-intro h1{font-size:clamp(25px,3vw,36px)}.page-intro .lead{font-size:17px;color:#536b7d;max-width:840px}.content-panel{padding:30px;background:white;border:1px solid var(--line);border-radius:15px}.content-panel+.content-panel{margin-top:20px}.section-label{font-size:12px;letter-spacing:.13em;font-weight:800;color:#158a9d}.article-grid{display:grid;grid-template-columns:minmax(0,760px) minmax(205px,240px);gap:40px;align-items:start}.article-section{margin-top:42px}.article-section h2{border-bottom:1px solid var(--line);padding-bottom:13px}.article-section h3{margin-top:22px}.term-sidebar{background:#EAF6FA;padding:24px;border-radius:14px;position:sticky;top:20px}.term-sidebar h2{font-size:20px}.term-sidebar dl{margin:0}.term-sidebar dt{font-weight:700;color:var(--ink);margin-top:17px}.term-sidebar dd{margin:4px 0 0;font-size:14px;line-height:1.7}.table-scroll{overflow-x:auto;margin:20px 0}.data-table{border-collapse:collapse;background:white;width:100%;min-width:560px;font-size:15px}.data-table th,.data-table td{text-align:left;border:1px solid var(--line);padding:12px 16px;vertical-align:top}.data-table th{background:#e9f4f9;color:var(--ink)}.data-table tbody tr:nth-child(even){background:#f8fbfd}.number-list{list-style:none;padding:0;counter-reset:n}.number-list li{counter-increment:n;border-left:3px solid var(--teal);padding:7px 0 15px 21px;margin:0 0 20px}.number-list li::before{content:counter(n,decimal-leading-zero);font-size:13px;color:#11899e;font-weight:800;display:block;margin-bottom:6px}.matrix{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.matrix-card{padding:24px;border:1px solid var(--line);background:white;border-radius:13px}.matrix-card h3{color:var(--navy)}.matrix-card p{font-size:15px}.matrix-card ul{font-size:14px}.gallery-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}.gallery-item{margin:0;background:white;border:1px solid var(--line);padding:18px;border-radius:13px}.gallery-item figcaption{font-size:14px;line-height:1.7;margin-top:12px}.gallery-item strong{display:block;color:var(--ink);font-size:17px}.anchor-list{display:flex;flex-wrap:wrap;gap:11px;margin:18px 0 26px}.anchor-list a{background:#EAF6FA;padding:8px 15px;border-radius:8px;text-decoration:none;font-size:14px;font-weight:700}.faq details{border-bottom:1px solid var(--line);padding:15px 0}.faq summary{font-size:16px;font-weight:700;color:var(--ink);cursor:pointer}.faq details p{margin:13px 0 4px}.related{margin-top:53px;padding-top:27px;border-top:2px solid var(--line)}.related-links{display:flex;flex-wrap:wrap;gap:12px}.related-links a{border:1px solid var(--line);background:white;border-radius:9px;padding:10px 17px;font-size:14px;font-weight:700;text-decoration:none}.site-footer{background:var(--footer);color:#EAF7FF;padding:48px 0 25px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr;gap:80px}.footer-brand{font-size:22px;font-weight:800;color:#fff;margin-bottom:12px}.footer-brand span{font-size:11px;font-weight:500;letter-spacing:.12em;opacity:.7;margin-left:8px}.site-footer p{max-width:560px;font-size:14px}.site-footer .fineprint{color:#c0dae7;font-size:13px}.site-footer h2{font-size:18px;color:white}.footer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:7px 18px}.site-footer a{color:#D8F5FF;font-size:14px}.footer-bottom{border-top:1px solid rgba(255,255,255,.18);margin-top:27px;padding-top:19px;display:flex;justify-content:space-between;font-size:12px;color:#b4d5e3}.back-top{position:fixed;bottom:23px;right:23px;width:42px;height:42px;border:0;background:var(--navy);color:white;border-radius:12px;box-shadow:var(--shadow);opacity:0;pointer-events:none;transition:opacity .2s}.back-top.visible{opacity:1;pointer-events:auto}.mobile-bottom{display:none}
@media(max-width:1180px){.wrap{padding-inline:22px}.topic-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:980px){.header-top{height:63px;justify-content:space-between}.menu-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:5px;width:40px;height:40px;border:1px solid var(--line);background:white;border-radius:9px;flex-shrink:0}.menu-toggle span{width:19px;height:2px;background:var(--navy)}.header-note,.primary-nav{display:none}.brand{margin:auto}.brand img{max-height:30px;max-width:min(30vw,190px)}.entry-link{margin-left:0;padding:8px 12px;font-size:12px}.mobile-drawer{display:block;background:white;border-bottom:1px solid var(--line);padding:20px 22px}.drawer-head{display:none}.drawer-group{margin-bottom:16px}.drawer-group span{display:block;font-size:12px;color:var(--muted);font-weight:800}.drawer-group a{display:inline-block;margin:6px 18px 4px 0;font-size:14px}.js .drawer-backdrop{display:block;position:fixed;inset:0;background:rgba(6,32,50,.54);z-index:39;visibility:hidden;pointer-events:none;opacity:0;transition:opacity .2s}.js .mobile-drawer{position:fixed;inset:0 auto 0 0;z-index:40;width:min(86vw,344px);height:100dvh;overflow-y:auto;visibility:hidden;transform:translateX(-105%);transition:transform .22s,visibility .22s;box-shadow:16px 0 45px rgba(0,0,0,.15);padding:25px}.js .drawer-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}.drawer-close{font-size:30px;line-height:1;border:0;background:transparent;color:var(--navy)}.js.drawer-open .mobile-drawer{transform:translateX(0);visibility:visible}.js.drawer-open .drawer-backdrop{opacity:1;visibility:visible;pointer-events:auto}.drawer-open body{overflow:hidden}.js .drawer-group a{display:block;padding:6px 0}.hero{gap:26px;padding:30px}.article-grid{grid-template-columns:minmax(0,1fr) 220px;gap:24px}}
@media(max-width:760px){.split,.feature-2to1,.article-grid,.footer-grid{grid-template-columns:1fr}.split--reverse .split-visual{order:0}.hero{grid-template-columns:1fr}.hero .media{grid-row:1}.section{margin-top:38px}.term-sidebar{position:static}.topic-grid,.matrix{grid-template-columns:repeat(2,minmax(0,1fr))}.rule-grid{grid-template-columns:1fr}.timeline{display:grid;gap:15px}.timeline>div{border-left:2px solid var(--sky);border-top:0;padding:1px 0 0 28px}.timeline>div::before{top:0;left:-16px}.mobile-bottom{display:flex;position:fixed;bottom:0;left:0;right:0;z-index:20;background:white;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -5px 17px rgba(27,75,107,.07)}.mobile-bottom a{flex:1;text-align:center;padding:10px 5px;text-decoration:none;font-size:13px;font-weight:700;color:var(--muted)}.mobile-bottom a[aria-current=page]{color:var(--blue);border-top:2px solid var(--teal)}body{padding-bottom:calc(48px + env(safe-area-inset-bottom))}.back-top{bottom:75px}.gallery-grid{grid-template-columns:1fr}}
@media(max-width:640px){.wrap{padding-inline:16px}.site-main{padding-top:24px;padding-bottom:45px}body{font-size:15px}.hero{padding:23px 18px;gap:18px}.hero h1{font-size:29px}.page-intro .lead{font-size:15px}.section-heading{display:block}.topic-grid{grid-template-columns:1fr 1fr;gap:10px}.topic-card{min-height:0;padding:16px 14px}.topic-card strong{font-size:16px}.topic-card span{font-size:13px}.feature-main,.feature-mini,.content-panel{padding:21px}.media--hero{height:200px}.media--feature{height:180px}.media--card{height:145px}.media--banner{height:150px}.media--mobile{height:290px;max-width:250px}.matrix{grid-template-columns:1fr}.footer-grid{gap:20px}.quick-row{padding:10px 13px;gap:7px 12px}.header-top{gap:7px}.brand img{max-width:32vw}.entry-link{font-size:11px;padding:7px 9px}.entry-link span{display:none}.related-links{flex-direction:column}.related-links a{display:block}.table-scroll{margin-left:-6px;margin-right:-6px}}
@media(max-height:500px) and (max-width:760px){.mobile-bottom{position:static}body{padding-bottom:0}.back-top{bottom:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}