/* B体育：本地资源、内容优先的自适应主题 */
:root{color-scheme:dark;--bg:#111318;--nav:#151820;--panel:#1A1E27;--panel2:#222733;--text:#F7F8FA;--body:#D5D8DF;--muted:#AEB4C0;--line:rgba(255,255,255,.09);--main:#F45132;--hover:#FF684E;--gold:#D7A84B}
*,*::before,*::after{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--body);font:16px/1.75 system-ui,"PingFang SC","Microsoft YaHei",sans-serif;overflow-x:hidden}img{max-width:100%}a{color:inherit;text-decoration:none;overflow-wrap:anywhere;touch-action:manipulation}button{font:inherit;touch-action:manipulation}a:focus-visible,button:focus-visible{outline:2px solid var(--gold);outline-offset:3px}a:hover{color:var(--hover)}.wrap{width:min(1200px,calc(100% - 40px));margin-inline:auto;min-width:0}.site-header{background:var(--nav);border-bottom:1px solid var(--line);position:relative;z-index:40}.header-top{min-height:76px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;white-space:nowrap;flex-shrink:0}.brand img{height:44px;width:52px;object-fit:contain}.brand strong{font-size:22px;color:var(--text);display:block;line-height:1.2}.brand small{display:block;color:var(--muted);letter-spacing:.16em;font-size:10px;line-height:1.4}.desktop-main{display:flex;align-items:center;justify-content:center;gap:clamp(9px,1.5vw,25px);min-width:0;flex:1}.desktop-main a,.desktop-secondary a{display:inline-flex;min-height:44px;align-items:center;white-space:nowrap;position:relative;font-weight:650;font-size:14px}.desktop-main a.active::after,.desktop-secondary a.active::after{content:"";position:absolute;bottom:4px;left:0;right:0;height:2px;background:var(--main)}.register{background:var(--main);color:white!important;display:inline-flex;min-height:42px;align-items:center;justify-content:center;border-radius:7px;padding:0 22px;font-weight:750;white-space:nowrap}.register:hover{background:var(--hover)}.header-bottom{border-top:1px solid var(--line)}.desktop-secondary{display:flex;gap:32px;min-height:44px;align-items:center}.desktop-secondary a{font-size:13px;font-weight:500;color:var(--muted)}.desktop-secondary a.active{color:var(--text)}.menu-toggle{display:none}.mobile-drawer,.drawer-mask{display:none}.mobile-bottom{display:none}main.wrap{padding-top:30px;padding-bottom:84px;min-height:60vh}h1,h2,h3{color:var(--text);line-height:1.3;margin-top:0}h1{font-size:clamp(32px,3.25vw,42px);letter-spacing:-.025em}h2{font-size:clamp(23px,2.5vw,28px)}h3{font-size:19px}p{margin:0 0 18px}section{margin:0 0 50px}section p:last-child{margin-bottom:0}.eyebrow{display:block;color:var(--gold);font-size:12px;letter-spacing:.16em;font-weight:750;margin-bottom:12px}.lead{font-size:17px;color:var(--muted);max-width:850px}.page-intro{padding:22px 0 24px;border-bottom:1px solid var(--line);margin-bottom:35px}.page-intro p{max-width:900px}.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:22px}.section-head h2{margin-bottom:0}.section-head a,.read-link{color:var(--hover);font-weight:650;display:inline-flex;align-items:center;min-height:40px}.panel{background:var(--panel);border:1px solid var(--line);border-radius:14px;padding:26px;min-width:0}.panel--soft{background:var(--panel2)}.grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.grid-2{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px}.feature-split{display:grid;grid-template-columns:1.15fr 1fr;gap:30px;align-items:center}.feature-split.reverse{grid-template-columns:1fr 1.15fr}.feature-split.reverse .feature-copy{order:2}.feature-copy{min-width:0}.feature-copy h2{margin-bottom:18px}.media{position:relative;width:100%;max-width:100%;overflow:hidden;border-radius:12px;background:#12151c;aspect-ratio:16/9;min-width:0}.media>img{position:absolute;inset:0;width:100%;max-width:100%;height:100%;object-fit:contain;object-position:center center;display:block}.media-fallback{position:absolute;inset:0;display:block;background:linear-gradient(120deg,#171c25,#222733)}.media--portrait{aspect-ratio:4/5}.media--app{aspect-ratio:3/4;max-width:360px;margin-inline:auto}.media--square{aspect-ratio:1/1}.media--logo{aspect-ratio:auto;overflow:visible}.media--logo img{position:static;width:100%;height:100%;object-fit:contain}.media-caption{font-size:13px;color:var(--muted);margin-top:10px}.topic-card{min-width:0;border-top:2px solid var(--main);background:var(--panel);padding:24px;border-radius:0 0 12px 12px}.topic-card:nth-child(2){border-color:var(--gold)}.topic-card:nth-child(3){border-color:#8499b9}.topic-card h3{margin:0 0 13px}.topic-card p{font-size:15px}.thumb-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}.thumb-grid article{min-width:0}.thumb-grid h3{margin:15px 0 9px;font-size:17px}.thumb-grid p{font-size:14px;color:var(--muted)}.reading-list{list-style:none;padding:0;margin:0}.reading-list li{display:flex;gap:18px;align-items:flex-start;border-bottom:1px solid var(--line);padding:16px 0}.reading-list li:first-child{padding-top:0}.reading-list .num{font-size:23px;color:var(--gold);font-weight:750;min-width:38px}.reading-list strong{display:block;color:var(--text)}.reading-list p{margin:3px 0 0;color:var(--muted)}.columns{display:grid;grid-template-columns:minmax(0,2.05fr) minmax(230px,.8fr);gap:34px;align-items:start}.article-body{min-width:0}.article-body>section{border-bottom:1px solid var(--line);padding-bottom:30px;margin-bottom:32px}.article-body h2{margin-bottom:17px}.article-body p{max-width:74ch}.sidebar{position:sticky;top:20px;background:var(--panel);border-radius:12px;border:1px solid var(--line);padding:23px}.sidebar h2{font-size:19px}.sidebar a{display:block;border-top:1px solid var(--line);padding:9px 0;font-size:14px}.sidebar p{font-size:14px;color:var(--muted)}.tag-links{display:flex;flex-wrap:wrap;gap:10px}.tag-links a{background:var(--panel2);border:1px solid var(--line);padding:8px 14px;border-radius:6px;min-height:40px}.feature-img{margin:0 0 28px}.article-body .feature-img .media{max-height:420px}.gallery-group{margin-bottom:52px}.gallery-group>p{max-width:850px}.gallery-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px}.gallery-item{background:var(--panel);padding:14px;border:1px solid var(--line);border-radius:12px;min-width:0}.gallery-item h3{font-size:17px;margin:12px 0 8px}.gallery-item p{font-size:14px;margin-bottom:8px;color:var(--muted)}.gallery-item .media{max-height:350px}.article-index{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}.article-index a{padding:8px 14px;background:var(--panel2);border-radius:30px;min-height:40px}.simple-table{width:100%;border-collapse:collapse;table-layout:fixed}.simple-table th,.simple-table td{text-align:left;border-bottom:1px solid var(--line);padding:14px;overflow-wrap:anywhere;vertical-align:top}.simple-table th{color:var(--text);width:22%}.step-list{counter-reset:steps;list-style:none;padding:0;margin:0}.step-list li{counter-increment:steps;position:relative;padding:0 0 23px 48px;margin-bottom:20px;border-bottom:1px solid var(--line)}.step-list li::before{content:counter(steps);position:absolute;left:0;top:0;width:31px;height:31px;border-radius:50%;display:grid;place-items:center;color:white;background:var(--main);font-weight:700}.step-list h3{margin-bottom:9px}.qa-list{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.qa-item{background:var(--panel);border-radius:12px;border:1px solid var(--line);padding:22px;min-width:0}.qa-item h3{font-size:17px}.qa-item p{color:var(--muted);font-size:15px}.note{border-left:3px solid var(--gold);padding:16px 21px;background:var(--panel);color:var(--body);border-radius:0 8px 8px 0}.related{margin-top:44px;padding-top:28px;border-top:1px solid var(--line)}.related h2{font-size:22px}.related-links{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px}.related-links a{border:1px solid var(--line);background:var(--panel);border-radius:8px;padding:13px 15px;display:flex;justify-content:space-between;gap:10px;align-items:center;min-height:46px}.related-links a span{color:var(--main)}.carousel{position:relative;background:#12151c;border-radius:14px;padding:0 48px 37px;margin-bottom:26px;overflow:hidden}.carousel-track .slide[hidden]{display:none!important}.carousel-track .slide{display:block}.carousel-track .media{height:clamp(220px,24vw,300px);aspect-ratio:auto;border-radius:0}.carousel-btn{position:absolute;top:40%;height:44px;width:40px;background:var(--panel2);color:var(--text);border:1px solid var(--line);border-radius:7px;cursor:pointer}.carousel-btn:hover{background:#343c4e}.carousel-btn.prev{left:4px}.carousel-btn.next{right:4px}.carousel-dots{display:flex;justify-content:center;gap:12px;margin-top:10px}.carousel-dot{border:0;width:30px;height:30px;background:transparent;cursor:pointer;position:relative}.carousel-dot::after{content:"";width:9px;height:9px;border-radius:50%;background:#687181;position:absolute;inset:0;margin:auto}.carousel-dot[aria-current="true"]::after{background:var(--main);width:11px;height:11px}.site-footer{background:var(--nav);border-top:1px solid var(--line);padding:46px 0 22px}.footer-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:30px}.footer-grid h2{font-size:17px}.footer-grid a{display:block;font-size:14px;color:var(--muted);min-height:35px}.footer-bottom{border-top:1px solid var(--line);margin-top:25px;padding-top:17px;display:flex;gap:20px;justify-content:space-between;align-items:center;color:var(--muted);font-size:12px}.footer-bottom p{margin:0}.footer-sign{display:flex;align-items:center;gap:9px;white-space:nowrap}.footer-sign img{width:35px;height:32px;object-fit:contain}
@media(max-width:1024px){.desktop-main,.header-bottom{display:none}.header-top{min-height:62px;justify-content:space-between;gap:8px}.menu-toggle{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:4px;width:44px;height:44px;flex:0 0 44px;border:0;background:transparent;color:white;cursor:pointer}.menu-toggle span{width:21px;height:2px;background:var(--text);display:block}.brand{gap:6px;margin:auto;min-width:0}.brand img{width:36px;height:37px}.brand strong{font-size:19px}.brand small{font-size:8px}.register{padding:0 13px;min-height:40px;font-size:14px;flex:0 0 auto}.mobile-drawer{display:block;position:fixed;inset:0 auto 0 0;width:min(84vw,320px);max-width:100%;height:100dvh;overflow-y:auto;background:#151820;color:#F7F8FA;z-index:12000;transform:translateX(-105%);transition:transform .2s ease;visibility:hidden}.mobile-drawer.is-open{transform:translateX(0);visibility:visible}.drawer-mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:11000;opacity:0;pointer-events:none}.drawer-mask.is-visible{display:block;opacity:1;pointer-events:auto}.drawer-head{display:flex;align-items:center;justify-content:space-between;padding:14px 18px;border-bottom:1px solid var(--line)}.drawer-brand{display:flex;gap:9px;align-items:center}.drawer-brand img{width:32px;height:32px;object-fit:contain}.drawer-close{border:0;background:var(--panel2);color:white;width:44px;height:44px;border-radius:6px;font-size:30px;line-height:1}.drawer-group{padding:15px 20px 8px}.drawer-group h2{font-size:12px;color:var(--gold);letter-spacing:.14em;margin-bottom:6px}.drawer-group nav a{display:block;min-height:44px;padding:8px 10px;border-radius:5px}.drawer-group nav a.active{background:var(--panel2);color:var(--hover)}.drawer-active{overflow:hidden}.mobile-bottom{display:grid;grid-template-columns:repeat(4,1fr);position:fixed;bottom:0;left:0;right:0;z-index:50;background:var(--nav);padding-bottom:env(safe-area-inset-bottom,0px);border-top:1px solid var(--line);box-shadow:0 -4px 24px rgba(0,0,0,.25)}.mobile-bottom a{min-height:55px;display:flex;align-items:center;justify-content:center;font-size:14px}.mobile-bottom a:last-child{color:var(--hover);font-weight:750}main.wrap{padding-bottom:100px}.columns{grid-template-columns:1fr}.sidebar{position:static}.thumb-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.gallery-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:700px){body{font-size:15px;line-height:1.75}.wrap{width:calc(100% - 32px)}h1{font-size:clamp(26px,7vw,30px)}h2{font-size:clamp(21px,5.4vw,24px)}h3{font-size:18px}main.wrap{padding-top:21px}.section-head{align-items:start}.lead{font-size:15px}.page-intro{padding-top:12px}.grid-3,.grid-2,.feature-split,.feature-split.reverse,.qa-list{grid-template-columns:1fr}.feature-split.reverse .feature-copy{order:0}.panel{padding:19px}.topic-card{padding:20px}.thumb-grid{gap:14px}.thumb-grid h3{font-size:16px}.thumb-grid p{font-size:13px}.gallery-grid{gap:13px}.gallery-item{padding:10px}.gallery-item .media{max-height:260px}.gallery-item h3{font-size:15px}.gallery-item p{font-size:13px}.carousel{padding:0 35px 36px}.carousel-track .media{height:clamp(140px,40vw,180px)}.carousel-btn{width:31px;height:40px;top:31%}.carousel-btn.prev{left:2px}.carousel-btn.next{right:2px}.related-links,.footer-grid{grid-template-columns:1fr}.footer-bottom{flex-direction:column;align-items:start}.simple-table th,.simple-table td{display:block;width:100%;padding:9px 10px}.simple-table td{padding-bottom:18px}.article-body>section{margin-bottom:25px}.sidebar{padding:18px}}
@media(max-width:360px){.brand img{width:29px}.brand strong{font-size:17px}.brand small{font-size:7px}.register{padding:0 10px}.menu-toggle{width:40px;flex-basis:40px}.thumb-grid{grid-template-columns:1fr 1fr;gap:10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{transition:none!important;animation:none!important}}