/* KAIYUN SPORTS · responsive editorial system */
:root{--bg:#F6FAFC;--surface:#FFF;--aqua:#EAF6FA;--soft:#EDF4F8;--accent:#25C8D1;--sky:#25B6E8;--blue:#1787DB;--navy:#174B78;--ink:#183A56;--body:#31485D;--muted:#687D8E;--line:#DCE9F0;--footer:#123653;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}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}a{color:#126aa5;text-underline-offset:3px}a:hover{color:#087da9}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid #29b9d6;outline-offset:3px}button{font:inherit;cursor:pointer}h1,h2,h3,p{margin-top:0}h1,h2,h3{color:var(--ink);line-height:1.36}h1{font-size:clamp(32px,3vw,36px);letter-spacing:-.035em}h2{font-size:26px}h3{font-size:19px}p{margin-bottom:1.05em}.container{width:min(var(--max),calc(100% - 56px));margin-inline:auto}.narrow{max-width:780px}.section{padding-block:52px}.section-soft{background:var(--aqua)}.section-white{background:white}.eyebrow{font-size:13px;letter-spacing:.13em;font-weight:700;color:#087da9;text-transform:uppercase}.section-heading{display:flex;justify-content:space-between;align-items:end;gap:20px;margin-bottom:24px}.section-heading p{max-width:520px;margin:0}.page-intro{padding:52px 0 30px}.page-intro p{max-width:820px;font-size:17px}.kicker{color:#098ca4;font-size:13px;font-weight:700;letter-spacing:.13em;text-transform:uppercase}.muted{color:var(--muted)}.site-header{background:white;position:relative;z-index:20;border-bottom:1px solid var(--line)}.topbar{height:72px;display:flex;gap:24px;align-items:center}.brand{display:flex;align-items:center;min-width:0;text-decoration:none;color:var(--ink);font-size:24px;font-weight:800;line-height:1}.brand small{display:block;font-size:10px;letter-spacing:.12em;color:var(--navy);margin-top:5px}.brand img{display:block;width:auto;height:auto;max-height:38px;max-width:230px;object-fit:contain}.header-note{margin:auto;color:var(--muted);font-size:14px;white-space:nowrap}.entry-button{background:linear-gradient(100deg,#187cbd,#12a7b8);color:#fff;border-radius:9px;white-space:nowrap;font-size:14px;font-weight:700;text-decoration:none;padding:9px 21px;min-height:40px;display:inline-flex;align-items:center;justify-content:center}.entry-button:hover{color:#fff;background:#174B78}.desktop-nav{background:var(--navy)}.nav-row{display:flex;min-width:0;justify-content:space-between;gap:6px}.nav-row a{color:#e8f7ff;text-decoration:none;padding:11px 10px 10px;white-space:nowrap;border-bottom:3px solid transparent;font-size:14px;line-height:1.7}.nav-row a:hover,.nav-row a[aria-current]{color:white;border-bottom-color:#54d8db;background:#ffffff16}.menu-toggle{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;background:transparent;border:1px solid var(--line);border-radius:8px;padding:10px}.menu-toggle span{height:2px;background:var(--ink);width:100%}.drawer,.drawer-mask{display:none}.quickbar{background:#eaf5f9;border-bottom:1px solid var(--line)}.quickbar .container{display:flex;flex-wrap:wrap;gap:10px 30px;padding-block:12px}.quickbar-group{display:flex;align-items:center;flex-wrap:wrap;gap:7px;font-size:13px}.quickbar-group strong{color:var(--ink)}.quickbar-group a{color:#146c9c}.hero{padding:50px 0 48px}.hero-grid{display:grid;grid-template-columns:minmax(0,1.12fr) minmax(0,.88fr);align-items:center;gap:34px}.hero h1{font-size:clamp(36px,3.55vw,42px);max-width:640px}.hero p{max-width:590px}.hero-lead{font-size:18px;color:var(--ink)}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:23px}.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border:1px solid #cce0ea;border-radius:8px;padding:10px 18px;font-weight:700;font-size:14px;min-height:44px;background:white}.btn-primary{background:var(--navy);border-color:var(--navy);color:white}.btn-primary:hover{background:#0e668f;color:white}.media{width:100%;min-width:0;display:flex;align-items:center;justify-content:center;overflow:hidden;background:var(--aqua);border-radius:14px;position:relative}.media img{display:block;width:auto;height:auto;max-width:100%;max-height:100%;object-fit:contain;object-position:center}.media-placeholder{height:100%;width:100%;background:linear-gradient(145deg,#e7f4f8,#d8eef2);display:block}.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--wide{background:#eff8fa}.media--portrait{max-width:360px;margin-inline:auto}.topic-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:14px}.topic-card{padding:21px;background:white;border:1px solid var(--line);border-radius:10px;text-decoration:none;display:flex;flex-direction:column;gap:9px;min-height:172px}.topic-card h3{margin:0;font-size:18px}.topic-card p{font-size:14px;margin:0;color:var(--body);line-height:1.7}.topic-card span{font-size:13px;font-weight:700;margin-top:auto}.topic-card:hover,.related-link:hover{border-color:#7cbbc9;background:#f5fbff}.feature-layout{display:grid;grid-template-columns:minmax(0,2fr) minmax(0,1fr);gap:18px}.feature-lead{background:#eaf6fa;border-radius:12px;padding:28px}.feature-side{display:grid;gap:14px}.feature-note{background:#fff;border:1px solid var(--line);padding:20px;border-radius:12px}.feature-note h3,.feature-lead h3{margin-bottom:10px}.split{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;align-items:center}.split.reverse>.media{order:-1}.textlink{font-weight:700}.knowledge-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}.knowledge-grid article,.info-card{background:white;border:1px solid var(--line);border-radius:11px;padding:23px}.knowledge-grid article h3{margin-bottom:10px}.steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;counter-reset:steps}.steps>div{padding:18px;border-top:3px solid #26abc2;background:white}.steps>div:before{counter-increment:steps;content:'0' counter(steps);font-weight:800;color:#168aaf;display:block}.article{max-width:780px}.article p,.article li{line-height:1.85}.article h2{margin-top:35px}.article ul,.article ol{padding-left:24px}.article li+li{margin-top:8px}.inline-index{display:flex;gap:10px;flex-wrap:wrap;margin:16px 0 28px}.inline-index a{padding:6px 12px;border:1px solid var(--line);border-radius:7px;background:white;font-size:14px}.section-block{padding-block:32px}.compare-table{width:100%;border-collapse:collapse;font-size:15px;background:white}.compare-table th,.compare-table td{padding:13px 15px;border:1px solid var(--line);vertical-align:top;text-align:left}.compare-table th{background:#eaf6fa;color:var(--ink)}.table-scroll{width:100%;overflow-x:auto;border-radius:10px}.table-scroll table{min-width:560px}.timeline{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}.timeline article{padding:21px;background:#fff;border-left:4px solid #21b9c6;border-radius:8px}.story-grid{display:grid;grid-template-columns:minmax(0,760px) minmax(0,240px);gap:35px;align-items:start}.term-aside{background:#eaf6fa;border-radius:12px;padding:20px;position:sticky;top:22px}.term-aside dt{font-weight:bold;color:var(--ink)}.term-aside dd{margin:0 0 16px;font-size:14px}.matrix{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:15px}.matrix article{padding:24px;background:white;border-top:4px solid var(--accent);border-radius:9px}.matrix p{font-size:15px}.gallery{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.gallery figure{margin:0;background:white;border:1px solid var(--line);border-radius:12px;padding:14px}.gallery figcaption{padding:13px 7px 6px;font-size:14px}.gallery figcaption strong{display:block;color:var(--ink);font-size:17px}.reading-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}.reading-list article{padding:20px;background:white;border:1px solid var(--line);border-radius:10px}.handbook{background:white;border:1px solid var(--line);border-radius:12px;padding:26px}.handbook+.handbook{margin-top:22px}.faq details{border-bottom:1px solid var(--line);padding:14px 0}.faq summary{cursor:pointer;font-weight:700;color:var(--ink);list-style-position:outside;padding-right:10px}.faq details p{margin:12px 0 0}.related{padding-block:42px 62px}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:13px}.related-link{text-decoration:none;display:grid;grid-template-columns:1fr auto;gap:7px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:19px}.related-link strong{color:var(--ink);grid-column:1}.related-link span:nth-child(2){grid-row:2;grid-column:1;color:var(--muted);font-size:13px}.related-link span:last-child{grid-column:2;grid-row:1/3;align-self:center;font-size:20px}.editor-note{border-left:3px solid var(--accent);background:var(--aqua);padding:20px 22px;font-size:14px}.site-footer{background:var(--footer);color:#eaf7ff}.footer-layout{padding-block:42px 30px;display:grid;grid-template-columns:1.5fr 1fr;gap:60px}.site-footer p{font-size:14px;color:#d3e9f1}.footer-brand{font-weight:800;font-size:22px;color:white}.footer-brand span{font-size:12px;font-weight:400;letter-spacing:.1em}.site-footer nav strong{display:block;margin-bottom:12px}.footer-links{display:grid;grid-template-columns:repeat(2,1fr);gap:5px 12px}.site-footer a{color:#eaf7ff;font-size:14px}.footer-bottom{border-top:1px solid #ffffff25;padding:17px 0;display:flex;justify-content:space-between;gap:20px;font-size:13px}.backtop{position:fixed;right:18px;bottom:18px;z-index:10;background:#174B78;color:white;width:40px;height:40px;display:grid;place-items:center;border-radius:50%;text-decoration:none;box-shadow:0 2px 13px #0002}.backtop:hover{color:white}.bottom-nav{display:none}
@media(max-width:980px){.container{width:calc(100% - 44px)}.topbar{height:63px;justify-content:space-between;gap:10px}.menu-toggle{display:flex;flex:0 0 40px}.brand{position:absolute;left:50%;transform:translateX(-50%);max-width:calc(100% - 195px);font-size:19px}.brand img{max-height:30px;max-width:100%}.brand small{font-size:8px}.header-note,.desktop-nav{display:none}.entry-button{padding:7px 12px;min-height:39px;font-size:13px;margin-left:auto}.drawer-mask{display:block;position:fixed;inset:0;background:#0d263a77;z-index:40;opacity:0;visibility:hidden;pointer-events:none;transition:opacity .2s,visibility .2s}.drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(86vw,344px);z-index:41;background:white;transform:translateX(-102%);visibility:hidden;overflow-y:auto;transition:transform .2s,visibility .2s;padding:22px}.drawer-open{overflow:hidden}.drawer-open .drawer-mask{opacity:1;visibility:visible;pointer-events:auto}.drawer-open .drawer{transform:translateX(0);visibility:visible}.drawer-heading{display:flex;align-items:center;justify-content:space-between;margin-bottom:20px}.drawer-close{height:42px;width:42px;border:1px solid var(--line);border-radius:8px;background:var(--aqua);font-size:25px;line-height:1}.drawer-group{padding-block:10px;border-top:1px solid var(--line)}.drawer-group p{font-size:12px;font-weight:700;color:var(--muted);margin:0 0 5px}.drawer-group a{display:block;text-decoration:none;color:var(--ink);padding:8px 10px;border-radius:6px}.drawer-group a[aria-current]{background:var(--aqua);font-weight:700}.topic-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.story-grid{grid-template-columns:minmax(0,1fr) 220px;gap:22px}}
@media(max-width:760px){.container{width:calc(100% - 32px)}.section{padding-block:35px}.hero{padding:28px 0}.hero-grid,.split,.feature-layout,.story-grid,.footer-layout{grid-template-columns:1fr}.hero-grid{gap:24px}.hero-grid>.media{grid-row:2}.hero h1{font-size:clamp(27px,6.5vw,31px)}.hero-lead{font-size:16px}.page-intro{padding:32px 0 18px}.page-intro h1{font-size:clamp(25px,5vw,29px)}.page-intro p{font-size:16px}.section-heading{display:block}.feature-side{grid-template-columns:repeat(2,minmax(0,1fr))}.knowledge-grid,.timeline,.matrix,.related-grid{grid-template-columns:1fr}.term-aside{position:static}.gallery{grid-template-columns:1fr}.reading-list{grid-template-columns:1fr}.steps{grid-template-columns:repeat(2,minmax(0,1fr))}.media--hero{height:200px}.media--feature{height:180px}.media--card{height:145px}.media--banner{height:150px}.media--mobile{height:290px;max-width:250px}.media--portrait{max-width:250px}.site-footer{padding-bottom:65px}.footer-layout{gap:15px}.bottom-nav{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:25;background:white;border-top:1px solid var(--line);padding-bottom:env(safe-area-inset-bottom);box-shadow:0 -2px 10px #0b334414}.bottom-nav a{text-align:center;display:block;text-decoration:none;color:var(--ink);font-size:13px;padding:9px 3px;min-height:46px}.bottom-nav a[aria-current]{color:#067fa2;font-weight:bold;border-top:3px solid var(--accent);padding-top:6px}.backtop{bottom:74px}.section-heading p{margin-top:8px}.faq details{padding-inline:5px}}
@media(max-width:640px){h2{font-size:22px}h3{font-size:18px}body{font-size:15px}.quickbar .container{gap:6px 14px}.quickbar-group{gap:4px;font-size:12px}.topic-grid{grid-template-columns:1fr}.topic-card{min-height:auto;padding:17px}.feature-side{grid-template-columns:1fr}.feature-lead{padding:22px}.handbook{padding:19px}.steps{grid-template-columns:1fr 1fr}.footer-bottom{flex-direction:column;gap:2px}.brand{max-width:calc(100% - 182px)}}
@media(max-height:430px) and (max-width:760px){.bottom-nav{position:static}.site-footer{padding-bottom:0}.backtop{bottom:18px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

.nojs-nav{display:flex;flex-wrap:wrap;gap:10px;padding-block:13px}.nojs-nav a{padding:7px 12px;background:#eaf6fa;border:1px solid #dce9f0;border-radius:7px;font-size:14px}