.ktvhsub{max-width:820px;margin:0 auto}
.ktvhsub-hp{position:absolute!important;left:-9999px!important;width:1px;height:1px;overflow:hidden}
.ktvhsub-title{font-weight:700;font-size:18px;margin-bottom:12px}
.ktvhsub-row{display:flex;gap:12px;flex-wrap:wrap}
.ktvhsub-field{flex:1;min-width:200px;display:flex;flex-direction:column;gap:6px;margin-bottom:12px;text-align:left}
.ktvhsub-lb{font-size:13px;font-weight:700;opacity:.85}
.ktvhsub input,.ktvhsub select,.ktvhsub textarea{width:100%;border:1.5px solid rgba(0,0,0,.16);border-radius:10px;padding:13px 15px;font-family:Arial,"Helvetica Neue",Helvetica,sans-serif;font-size:16px;background:#fff;color:#141B2E;box-sizing:border-box}
.ktvhsub textarea{resize:vertical;min-height:52px}
.ktvhsub input:focus,.ktvhsub select:focus,.ktvhsub textarea:focus{outline:none;border-color:#CB4A24;box-shadow:0 0 0 3px rgba(203,74,36,.18)}
.ktvhsub-msg{margin-bottom:12px}
.ktvhsub-actions{display:flex;gap:12px}
.ktvhsub-btn{background:#CB4A24;color:#fff;border:0;border-radius:10px;padding:14px 26px;font:700 15px/1 Arial,"Helvetica Neue",Helvetica,sans-serif;min-height:52px;cursor:pointer;transition:background-color .18s,transform .18s}
.ktvhsub-btn:hover{background:#A83C15;transform:translateY(-1px)}
.ktvhsub-btn[disabled]{opacity:.65;cursor:wait;transform:none}
.ktvhsub-note{margin-top:12px;font-size:14px;font-weight:700;min-height:20px}
.ktvhsub-note.err{color:#c0392b}
.ktvhsub-note.ok{color:#1a7f4b}
/* Trên dải navy (section .lead) */
.lead .ktvhsub-lb{color:#fff;opacity:.85}
.lead .ktvhsub-note{color:#fff}
.lead .ktvhsub-note.ok{color:#7fe0a8}
.lead .ktvhsub-note.err{color:#ffb3a3}
@media(max-width:560px){.ktvhsub-row{flex-direction:column}.ktvhsub-field{min-width:0}.ktvhsub-btn{width:100%}}