/* V15.1: official BYD logo, centered heading and version on desktop. */
.chat-head .byd-chat-intro h2 .byd-assistant-brand{display:none!important}
.chat-head .byd-chat-intro h2 .byd-official-wordmark{display:block!important;width:clamp(100px,12vw,165px)!important;max-width:95%!important;height:auto!important;object-fit:contain!important;margin:0 auto 6px!important}
.chat-head .byd-chat-intro h2 .byd-version-button{display:block!important;margin:9px auto 0!important;padding:3px 8px!important;text-align:center!important;color:var(--bydi-ui-residual-ff3b20)!important;font-style:normal!important;font-weight:500!important;max-width:100%!important}
.byd-version-short{display:none}
.chat-head .byd-chat-intro h2{display:flex!important;flex-direction:column!important;align-items:center!important;justify-content:center!important;text-align:center!important}
@media(min-width:701px){
 .chat-head{grid-template-columns:minmax(0,145px) minmax(0,1fr) minmax(0,145px)!important}
 .chat-head .bot-avatar{grid-column:1!important;grid-row:1!important}
 .chat-head .byd-chat-intro h2{grid-column:2!important;grid-row:1!important;justify-self:center!important;width:100%!important}
 .chat-head .byd-chat-intro h2 .byd-version-button{font-size:clamp(15px,1.5vw,22px)!important}
}
@media(max-width:700px){
 .chat-head{grid-template-columns:minmax(0,120px) minmax(0,1fr)!important}
 .chat-head .byd-chat-intro h2{grid-column:2!important;grid-row:1!important}
 .chat-head .byd-chat-intro h2 .byd-official-wordmark{display:block!important;width:clamp(92px,29vw,152px)!important;max-width:92%!important;margin:0 auto 4px!important}
 .byd-version-long{display:none}.byd-version-short{display:inline}
 .chat-head .byd-chat-intro h2 .byd-version-button{font-size:clamp(12px,3.6vw,17px)!important;margin-top:4px!important}
}
/* Two equal action buttons in the existing header. */
.byd-v14-topbar .byd-test-actions{display:grid!important;grid-template-columns:repeat(2,minmax(0,1fr))!important}
.byd-v14-topbar .byd-test-actions button:last-child{grid-column:auto!important}