/* ============================================
   B体育 - 全站样式表
   品牌色: #0066FF(主蓝) #00D4FF(青) #0A1628(深底)
   ============================================ */

/* Reset & Base */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;color:#e0e6ed;background:#0A1628;line-height:1.7;overflow-x:hidden}
a{color:#00D4FF;text-decoration:none;transition:color .3s}
a:hover{color:#0066FF}
img{max-width:100%;height:auto;display:block}
ul,ol{list-style:none}
h1,h2,h3,h4,h5,h6{font-weight:700;line-height:1.3;color:#fff}

/* Container */
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ===== Header & Navigation ===== */
.site-header{position:fixed;top:0;left:0;width:100%;z-index:1000;background:rgba(10,22,40,.95);backdrop-filter:blur(10px);border-bottom:1px solid rgba(0,212,255,.15);transition:all .3s}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;max-width:1200px;margin:0 auto;padding:0 20px}
.logo-wrap{display:flex;align-items:center;gap:10px}
.logo-wrap img{height:42px;width:auto}
.logo-text{font-size:1.25rem;font-weight:800;background:linear-gradient(135deg,#0066FF,#00D4FF);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;white-space:nowrap}
.main-nav{display:flex;align-items:center;gap:6px}
.main-nav a{padding:8px 14px;border-radius:6px;font-size:.9rem;color:#c0cfe0;transition:all .3s;white-space:nowrap}
.main-nav a:hover,.main-nav a.active{color:#00D4FF;background:rgba(0,212,255,.1)}
.mobile-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer}

/* Search Bar (standalone for inner pages) */
.search-bar{background:rgba(0,102,255,.08);padding:12px 0;border-bottom:1px solid rgba(0,212,255,.1)}
.search-bar .container{display:flex;justify-content:center}
.search-form{display:flex;max-width:560px;width:100%}
.search-form input{flex:1;padding:10px 18px;border:2px solid rgba(0,212,255,.3);border-right:none;border-radius:8px 0 0 8px;background:rgba(10,22,40,.8);color:#fff;font-size:.95rem;outline:none;transition:border-color .3s}
.search-form input:focus{border-color:#00D4FF}
.search-form input::placeholder{color:#5a7a9a}
.search-form button{padding:10px 24px;background:linear-gradient(135deg,#0066FF,#00D4FF);border:none;border-radius:0 8px 8px 0;color:#fff;font-size:.95rem;cursor:pointer;transition:opacity .3s}
.search-form button:hover{opacity:.85}

/* ===== Banner ===== */
.td6jq{position:relative;margin-top:68px;height:560px;overflow:hidden}
.td6jq img{width:100%;height:100%;object-fit:cover}
.0ea7l{position:absolute;inset:0;background:linear-gradient(180deg,rgba(10,22,40,.25) 0%,rgba(10,22,40,.88) 100%);display:flex;align-items:center;justify-content:center}
.gxet2t3h{text-align:center;max-width:800px;padding:0 20px}
.gxet2t3h h1{font-size:2.6rem;margin-bottom:16px;text-shadow:0 2px 20px rgba(0,102,255,.4)}
.gxet2t3h h1 span{background:linear-gradient(135deg,#0066FF,#00D4FF);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
.gxet2t3h p{font-size:1.05rem;color:#a0b8d0;line-height:1.8;margin-bottom:20px}
.6y7plw{display:flex;flex-wrap:wrap;justify-content:center;gap:10px;margin-top:18px}
.6y7plw span{padding:6px 16px;background:rgba(0,212,255,.12);border:1px solid rgba(0,212,255,.25);border-radius:20px;font-size:.85rem;color:#00D4FF}

/* Hero Search (integrated in banner) */
.aqebt{margin:18px auto 0;max-width:560px}
.aqebt .search-form{display:flex;width:100%}
.aqebt .search-form input{background:rgba(10,22,40,.7);border-color:rgba(0,212,255,.4)}
.aqebt .search-form input:focus{border-color:#00D4FF;background:rgba(10,22,40,.9)}

/* ===== EEAT Bar ===== */
.vgat21{background:rgba(0,102,255,.1);border-bottom:1px solid rgba(0,212,255,.12);padding:10px 0}
.vgat21 .container{display:flex;justify-content:center;flex-wrap:wrap;gap:24px}
.sdtkvjxg{font-size:.85rem;color:#7ab8d8;display:flex;align-items:center;gap:6px}

/* ===== Section Common ===== */
.section{padding:60px 0}
.section-alt{background:rgba(0,102,255,.04)}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{font-size:1.9rem;margin-bottom:10px}
.section-title h2 span{color:#00D4FF}
.section-title p{color:#7a9ab8;font-size:1rem}
.section-title h3{font-size:1.1rem;color:#5a8ab0;margin-top:6px;font-weight:400}
.section-title h5{font-size:1rem;color:#7a9ab8;font-weight:500}

/* ===== Video Card Grid ===== */
.sno2lh3{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.ykg76d13{position:relative;border-radius:12px;overflow:hidden;background:#111d30;border:1px solid rgba(0,212,255,.1);transition:all .4s;cursor:pointer}
.ykg76d13:hover{transform:translateY(-6px);border-color:rgba(0,212,255,.35);box-shadow:0 12px 40px rgba(0,102,255,.2)}
.t07me27o{position:relative;padding-top:56.25%;overflow:hidden}
.t07me27o img,.t07me27o video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;transition:transform .5s}
.ykg76d13:hover .t07me27o img,.ykg76d13:hover .t07me27o video{transform:scale(1.08)}
.bet70ge{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;background:rgba(0,0,0,.4);opacity:0;transition:opacity .4s;z-index:2}
.ykg76d13:hover .bet70ge{opacity:1}
.bet70ge i{width:56px;height:56px;background:rgba(0,102,255,.85);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:0;transition:transform .3s}
.bet70ge i:hover{transform:scale(1.1)}
.bet70ge i::after{content:"";border-style:solid;border-width:10px 0 10px 18px;border-color:transparent transparent transparent #fff;margin-left:4px}
.ue9mn6{padding:16px}
.ue9mn6 h4{font-size:1rem;margin-bottom:8px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.60hpw{display:flex;gap:14px;font-size:.8rem;color:#5a7a9a}
.60hpw span{display:flex;align-items:center;gap:4px}
.60hpw-extra{display:flex;gap:14px;font-size:.78rem;color:#5a8ab0;margin-top:6px}
.60hpw-extra .xabki6{color:#00D4FF}
.60hpw-extra .nxu53{color:#5a7a9a}
.ypl2mzp{display:inline-block;padding:2px 8px;background:rgba(0,212,255,.12);border-radius:4px;font-size:.75rem;color:#00D4FF;margin-top:8px;margin-right:4px}

/* ===== Module Cards ===== */
.cw6orl{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.yxh2vs{background:linear-gradient(145deg,#111d30,#0d1825);border:1px solid rgba(0,212,255,.1);border-radius:12px;padding:30px 24px;text-align:center;transition:all .4s}
.yxh2vs:hover{border-color:#00D4FF;transform:translateY(-4px);box-shadow:0 8px 30px rgba(0,102,255,.15)}
.cez68sy5{width:60px;height:60px;margin:0 auto 16px;background:linear-gradient(135deg,#0066FF,#00D4FF);border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:1.6rem;color:#fff}
.yxh2vs h4{font-size:1.05rem;margin-bottom:10px}
.yxh2vs p{font-size:.88rem;color:#7a9ab8;line-height:1.6}

/* ===== Expert Section ===== */
.uv3fia{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.xiy6lyj{background:#111d30;border:1px solid rgba(0,212,255,.1);border-radius:12px;overflow:hidden;text-align:center;transition:all .4s}
.xiy6lyj:hover{border-color:#00D4FF;transform:translateY(-4px)}
.nspg569{width:100%;aspect-ratio:1;overflow:hidden}
.nspg569 img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.xiy6lyj:hover .nspg569 img{transform:scale(1.05)}
.lxe7wm{padding:20px 16px}
.lxe7wm h4{font-size:1rem;margin-bottom:4px}
.lxe7wm .role{color:#00D4FF;font-size:.85rem;margin-bottom:10px}
.lxe7wm p{font-size:.82rem;color:#7a9ab8;line-height:1.5;margin-bottom:12px}
.3l5gi{display:flex;gap:8px;justify-content:center}
.btn-sm{padding:6px 14px;border-radius:6px;font-size:.8rem;border:1px solid rgba(0,212,255,.3);color:#00D4FF;transition:all .3s;cursor:pointer;background:transparent}
.btn-sm:hover{background:rgba(0,212,255,.15);border-color:#00D4FF}

/* ===== FAQ Section ===== */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{border:1px solid rgba(0,212,255,.12);border-radius:10px;margin-bottom:12px;overflow:hidden;background:#111d30}
.faq-question{padding:18px 24px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;font-size:.95rem;transition:background .3s}
.faq-question:hover{background:rgba(0,212,255,.06)}
.faq-question::after{content:"+";font-size:1.3rem;color:#00D4FF;transition:transform .3s}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .4s ease;padding:0 24px}
.faq-item.active .faq-answer{max-height:300px;padding:0 24px 18px}
.faq-answer p{font-size:.9rem;color:#7a9ab8;line-height:1.7}

/* ===== Reviews ===== */
.8uvfyvr{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.xfweu{background:#111d30;border:1px solid rgba(0,212,255,.1);border-radius:12px;padding:24px;transition:all .3s}
.xfweu:hover{border-color:rgba(0,212,255,.3)}
.ouglqerd{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.mxtvl{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#0066FF,#00D4FF);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem}
.mxm2jv6{font-weight:600;font-size:.95rem}
.n7ugm{font-size:.78rem;color:#5a7a9a}
.3r6uy1{color:#FFB800;font-size:.9rem;margin-bottom:10px;letter-spacing:2px}
.ldjooiqx{font-size:.9rem;color:#a0b8d0;line-height:1.7}

/* ===== Contact Section ===== */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.contact-card{background:#111d30;border:1px solid rgba(0,212,255,.1);border-radius:12px;padding:28px;text-align:center}
.contact-card h4{font-size:1rem;margin-bottom:14px;color:#00D4FF}
.contact-card p{font-size:.88rem;color:#7a9ab8;line-height:1.8;text-align:left}
.contact-card img{margin:10px auto;border-radius:8px}

/* ===== Community Grid ===== */
.gua08d{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.nm26igf8{background:#111d30;border:1px solid rgba(0,212,255,.1);border-radius:10px;padding:20px;text-align:center;transition:all .3s}
.nm26igf8:hover{border-color:#00D4FF;transform:translateY(-3px)}
.nm26igf8 .icon{font-size:2.2rem;margin-bottom:10px}
.nm26igf8 h5{font-size:.95rem;margin-bottom:6px}
.nm26igf8 p{font-size:.82rem;color:#7a9ab8}

/* ===== Share Bar ===== */
.4hxod{display:flex;justify-content:center;gap:16px;padding:30px 0}
.xk41sp{display:flex;align-items:center;gap:6px;padding:10px 20px;border-radius:8px;font-size:.88rem;color:#fff;transition:all .3s;cursor:pointer;border:none}
.xk41sp:hover{transform:translateY(-2px);opacity:.9}
.n8vp05{background:#07C160}
.hqle5a0{background:#E6162D}
.2rnm3j2{background:#161823}
.9hf0a1gm{background:#FB7299}

/* ===== Footer ===== */
.site-footer{background:#060e1a;border-top:1px solid rgba(0,212,255,.1);padding:40px 0 20px}
.footer-top{display:grid;grid-template-columns:1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-col h4{font-size:1rem;margin-bottom:14px;color:#00D4FF}
.footer-col p,.footer-col a{font-size:.85rem;color:#5a7a9a;line-height:2}
.footer-col a:hover{color:#00D4FF}
.footer-qr{display:flex;gap:20px;justify-content:center}
.footer-qr .qr-item{text-align:center}
.footer-qr .qr-item img{width:120px;height:120px;border-radius:8px;margin-bottom:6px}
.footer-qr .qr-item span{font-size:.78rem;color:#5a7a9a}
.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(0,212,255,.08);font-size:.82rem;color:#3a5a7a}
.footer-logo{display:flex;align-items:center;justify-content:center;gap:8px;margin-bottom:12px}
.footer-logo img{height:32px}
.footer-links{margin-top:8px}
.footer-links a{color:#5a7a9a;margin:0 6px;font-size:.8rem}
.footer-links a:hover{color:#00D4FF}

/* ===== Breadcrumb ===== */
.breadcrumb{padding:14px 0;font-size:.85rem;color:#5a7a9a}
.breadcrumb a{color:#00D4FF}
.breadcrumb span{margin:0 8px;color:#3a5a7a}

/* ===== How-To Guide ===== */
.z31em{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:30px}
.o1bx8b7u{text-align:center;padding:24px 16px;background:#111d30;border:1px solid rgba(0,212,255,.1);border-radius:12px;position:relative}
.o1bx8b7u .c1ejc9u{width:40px;height:40px;background:linear-gradient(135deg,#0066FF,#00D4FF);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-weight:700;font-size:1.1rem}
.o1bx8b7u h5{margin-bottom:8px;font-size:.95rem}
.o1bx8b7u p{font-size:.82rem;color:#7a9ab8}

/* ===== Partner Logos ===== */
.partner-wall{display:flex;flex-wrap:wrap;justify-content:center;gap:24px;padding:20px 0}
.ntt5ni{width:140px;height:70px;background:#111d30;border:1px solid rgba(0,212,255,.1);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:.85rem;color:#5a7a9a;transition:all .3s}
.ntt5ni:hover{border-color:#00D4FF;color:#00D4FF}

/* ===== Buttons ===== */
.btn-primary{display:inline-block;padding:12px 32px;background:linear-gradient(135deg,#0066FF,#00D4FF);color:#fff;border-radius:8px;font-size:.95rem;font-weight:600;transition:all .3s;border:none;cursor:pointer}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 8px 25px rgba(0,102,255,.35)}
.btn-outline{display:inline-block;padding:10px 28px;border:2px solid #00D4FF;color:#00D4FF;border-radius:8px;font-size:.9rem;transition:all .3s;cursor:pointer;background:transparent}
.btn-outline:hover{background:rgba(0,212,255,.1)}

/* ===== Inner Page Styles ===== */
.fg8n8cv{background:rgba(0,102,255,.08);border-bottom:1px solid rgba(0,212,255,.1);padding:10px 0;margin-bottom:0}
.fg8n8cv .container{display:flex;justify-content:center;flex-wrap:wrap;gap:20px}
.muifmzud{font-size:.82rem;color:#5a8ab0;display:flex;align-items:center;gap:5px}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .sno2lh3,.cw6orl{grid-template-columns:repeat(2,1fr)}
  .uv3fia{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr 1fr}
  .gua08d{grid-template-columns:repeat(2,1fr)}
  .z31em{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr}
}
@media(max-width:768px){
  .header-inner{height:56px}
  .main-nav{display:none;position:absolute;top:56px;left:0;width:100%;background:rgba(10,22,40,.98);flex-direction:column;padding:16px;gap:4px;border-bottom:1px solid rgba(0,212,255,.15)}
  .main-nav.open{display:flex}
  .mobile-toggle{display:block}
  .td6jq{height:420px;margin-top:56px}
  .gxet2t3h h1{font-size:1.8rem}
  .section{padding:40px 0}
  .section-title h2{font-size:1.5rem}
  .sno2lh3,.cw6orl,.8uvfyvr{grid-template-columns:1fr}
  .uv3fia{grid-template-columns:repeat(2,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .gua08d{grid-template-columns:1fr 1fr}
  .z31em{grid-template-columns:1fr}
  .footer-top{grid-template-columns:1fr;text-align:center}
  .4hxod{flex-wrap:wrap}
  .vgat21 .container{gap:12px}
}
@media(max-width:480px){
  .td6jq{height:340px}
  .gxet2t3h h1{font-size:1.4rem}
  .gxet2t3h p{font-size:.92rem}
  .uv3fia,.gua08d{grid-template-columns:1fr}
  .footer-qr{flex-direction:column;align-items:center}
  .vgat21 .container{flex-direction:column;align-items:center;gap:6px}
}

/* Lazy load placeholder */
img[loading="lazy"]{opacity:0;transition:opacity .5s}
img[loading="lazy"].loaded,img[loading="lazy"][src]{opacity:1}

/* Animations */
@keyframes fadeInUp{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}
.b3u0r{animation:fadeInUp .6s ease forwards}