.hdvvn-banner-stack{width:100%}.hdvvn-banner-item{width:100%}.hdvvn-banner-item a{display:block;width:100%}.hdvvn-banner-item img{display:block;width:100%;max-width:100%;height:auto;object-fit:contain}.hdvvn-featured-courses{background:#fff;border:1px solid #e2e8f0;padding:18px;border-radius:12px;margin-bottom:24px}.hdvvn-featured-courses h4{margin:0 0 12px;padding-bottom:8px;border-bottom:2px solid #04433b;color:#04433b;font-size:16px;font-weight:700}.hdvvn-featured-courses ul{margin:0;padding-left:18px;line-height:1.8}.hdvvn-featured-courses a{text-decoration:none;color:#334155;font-weight:500}.hdvvn-featured-courses a:hover{text-decoration:underline}

.hdvvn-float-contact{position:fixed;right:16px;top:50%;transform:translateY(-50%);z-index:9997;display:flex;flex-direction:column;gap:10px}.hdvvn-float-btn{width:50px;height:50px;border-radius:50%;display:flex;align-items:center;justify-content:center;text-decoration:none!important;box-shadow:0 5px 16px rgba(0,0,0,.18);transition:transform .15s ease}.hdvvn-float-btn:hover{transform:translateX(-2px)}.hdvvn-float-btn svg{width:25px;height:25px;fill:#fff}.hdvvn-float-facebook{background:#1877f2}.hdvvn-float-zalo{background:#1688f0}.hdvvn-float-whatsapp{background:#25d366}.hdvvn-float-phone{background:#d91f18}.hdvvn-zalo-mark{font:700 12px/1 Arial,sans-serif;color:#fff;letter-spacing:-.4px}@media(max-width:767px){.hdvvn-float-contact{right:9px;gap:8px}.hdvvn-float-btn{width:46px;height:46px}.hdvvn-float-btn svg{width:23px;height:23px}}@media(prefers-reduced-motion:reduce){.hdvvn-float-btn{transition:none}}