/* BLINKBUN v3.1.1 — persistent BBUN information sub-navigation */
.bbun311-hub{width:100%;margin:0 0 22px;position:relative;z-index:15}
.bbun311-hub-inner{display:flex;align-items:center;gap:14px;min-height:52px;padding:8px 10px;border:1px solid rgba(105,169,226,.18);border-radius:16px;background:linear-gradient(180deg,rgba(7,23,40,.92),rgba(4,15,28,.96));box-shadow:0 10px 28px rgba(0,0,0,.14);overflow:hidden}
.bbun311-hub-title{flex:0 0 auto;display:inline-flex;align-items:center;height:32px;padding:0 11px;border-radius:10px;background:rgba(69,224,255,.08);border:1px solid rgba(82,222,255,.14);color:#70e7ff;font-size:11px;font-weight:900;letter-spacing:.11em;white-space:nowrap}
.bbun311-tabs{display:flex;align-items:center;gap:6px;min-width:0;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch;padding:1px 0}
.bbun311-tabs::-webkit-scrollbar{display:none}
.bbun311-tabs a{flex:0 0 auto;display:inline-flex;align-items:center;justify-content:center;min-height:34px;padding:0 12px;border:1px solid transparent;border-radius:10px;color:#9fb5ca;text-decoration:none;font-size:13px;font-weight:760;white-space:nowrap;transition:background .16s ease,border-color .16s ease,color .16s ease,transform .16s ease}
.bbun311-tabs a:hover{color:#f4fbff;background:rgba(75,151,220,.08);border-color:rgba(93,170,232,.14);transform:translateY(-1px)}
.bbun311-tabs a[aria-current="page"]{color:#fff;background:linear-gradient(135deg,rgba(67,207,255,.16),rgba(118,89,255,.17));border-color:rgba(96,218,255,.28);box-shadow:inset 0 -2px 0 rgba(126,106,255,.82)}
/* document pages use a wider legacy content shell; keep the hub visually aligned without changing document content */
main>.bbun311-hub:first-child,.page>.bbun311-hub:first-child,.content>.bbun311-hub:first-child{margin-top:2px}
@media(max-width:760px){
 .bbun311-hub{margin-bottom:16px}
 .bbun311-hub-inner{display:block;padding:8px;border-radius:14px}
 .bbun311-hub-title{margin:0 0 7px 2px;height:27px;font-size:10px}
 .bbun311-tabs{gap:5px;padding-bottom:1px}
 .bbun311-tabs a{min-height:32px;padding:0 11px;font-size:12px}
}