:root{--brand:#B81828;--brand-2:#E0313F;--ink:#1B2126;--char:#404848;--mute:#5F6B78;--line:#E4E8ED;--ground:#fff;--paper:#F5F7FA;--holo:#0B7A8F;--holo-2:#22B8D4;--glow:rgba(11,122,143,.28);--r:18px;--max:1140px}
*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--ground);color:var(--ink);font:16px/1.7 'Be Vietnam Pro',system-ui,-apple-system,'Segoe UI',sans-serif;-webkit-font-smoothing:antialiased;overflow-x:clip}
img{max-width:100%;height:auto;display:block}a{color:var(--brand);text-underline-offset:3px}
h1,h2,h3,h4{color:var(--char);font-weight:700;letter-spacing:-.015em;line-height:1.22;margin:0 0 .5em;text-wrap:balance}
h1{font-size:clamp(1.9rem,5vw,3.1rem)}h2{font-size:clamp(1.55rem,3.6vw,2.3rem)}h3{font-size:1.15rem}
p{margin:0 0 1em}.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.eyebrow{font-size:.74rem;font-weight:600;letter-spacing:.16em;text-transform:uppercase;color:var(--brand);margin-bottom:12px}
.lead{font-size:1.1rem;color:var(--mute);max-width:62ch}
.btn{display:inline-flex;align-items:center;gap:8px;min-height:46px;padding:0 20px;border-radius:999px;font-weight:600;text-decoration:none;border:1.5px solid transparent;transition:transform .2s,box-shadow .2s;cursor:pointer;font:inherit;font-weight:600}
.btn svg{width:18px;height:18px;flex:none}.btn{white-space:nowrap}.btn:hover{transform:translateY(-1px)}.btn-p{background:var(--brand);color:#fff;box-shadow:0 8px 24px -10px rgba(184,24,40,.6)}
.btn-o{border-color:var(--line);color:var(--char);background:#fff}.btn-o:hover{border-color:var(--char)}
.btn-z{background:#0068FF;color:#fff}
/* header tự nhuộm theo mục đang xem */
.hd{position:sticky;top:0;z-index:40;background:rgba(255,255,255,.86);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px)}
.hd:after{content:"";display:block;height:2px;background:linear-gradient(90deg,var(--t1,var(--brand)),var(--t2,var(--holo)));transition:background .6s}
.hd .wrap{display:flex;align-items:center;gap:18px;min-height:64px}
.logo img{height:32px;width:auto}.nav{display:none;gap:4px;margin-left:auto}.nav a{padding:8px 12px;border-radius:10px;color:var(--char);text-decoration:none;font-weight:500;font-size:.95rem}.nav a:hover{background:var(--paper)}
.hd .cta{margin-left:auto;min-height:40px;padding:0 16px;font-size:.92rem}.nav+.cta{margin-left:6px}
.burger{margin-left:auto;background:none;border:1.5px solid var(--line);border-radius:10px;width:42px;height:42px;display:grid;place-items:center;cursor:pointer}
@media(max-width:640px){.hd .cta{display:none}}@media(min-width:900px){.nav{display:flex}.burger{display:none}}
.mnav{position:fixed;inset:64px 0 0;background:rgba(255,255,255,.97);z-index:39;padding:20px;display:none;flex-direction:column;gap:4px}.mnav a{padding:14px 16px;border-radius:12px;font-weight:600;color:var(--char);text-decoration:none;font-size:1.1rem}.mnav.on{display:flex}
/* mục & chuyển cảnh */
section.s{padding:clamp(56px,8vw,104px) 0;position:relative}section.s.alt{background:var(--paper)}
.rv{opacity:0;transform:translateY(18px);transition:opacity .7s cubic-bezier(.2,.7,.2,1),transform .7s cubic-bezier(.2,.7,.2,1)}.rv.in{opacity:1;transform:none}
@view-transition{navigation:auto}::view-transition-old(root){animation:vto .28s ease-in forwards}::view-transition-new(root){animation:vtn .38s cubic-bezier(.2,.7,.2,1) forwards}
@keyframes vto{to{opacity:0;transform:translateY(-8px)}}@keyframes vtn{from{opacity:0;transform:translateY(10px)}}
@media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none;transition:none}::view-transition-old(root),::view-transition-new(root){animation:none}*{animation-duration:.001s!important}}
/* hero */
.hero{padding:clamp(48px,7vw,96px) 0 32px;background:radial-gradient(900px 480px at 15% -10%,rgba(184,24,40,.08),transparent 60%),radial-gradient(700px 420px at 90% 10%,rgba(11,122,143,.10),transparent 60%)}
.hero h1{white-space:pre-line}.hero .g{display:grid;gap:36px;align-items:center}@media(min-width:960px){.hero .g{grid-template-columns:1.05fr 1fr}}
.stats{display:flex;flex-wrap:wrap;gap:22px 34px;margin-top:28px}.stats b{display:block;font-size:1.6rem;color:var(--char);letter-spacing:-.02em}.stats span{font-size:.85rem;color:var(--mute)}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
/* thẻ */
.grid{display:grid;gap:16px}.g2{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}.g3{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}.g4{grid-template-columns:repeat(auto-fit,minmax(200px,1fr))}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px;transition:transform .25s,box-shadow .25s;min-width:0}.card:hover{transform:translateY(-3px);box-shadow:0 18px 40px -22px rgba(27,33,38,.35)}
.card .ic{width:44px;height:44px;border-radius:12px;display:grid;place-items:center;background:var(--paper);color:var(--brand);margin-bottom:14px}.card .ic svg{width:22px;height:22px}
.card h3{margin-bottom:6px}.card p{color:var(--mute);font-size:.95rem;margin:0}
/* sản phẩm */
.pcard{display:flex;flex-direction:column;text-decoration:none;color:inherit;overflow:hidden;padding:0}.pcard .ph{aspect-ratio:1;background:var(--paper);display:grid;place-items:center;overflow:hidden}.pcard .ph img{width:100%;height:100%;object-fit:contain;padding:10%}
.pcard .pb{padding:14px 16px 18px}.pcard h3{font-size:.98rem;line-height:1.35;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.price{font-weight:700;color:var(--brand)}.price.ask{color:var(--mute);font-weight:500}
/* bài viết */
.post{display:grid;gap:18px;grid-template-columns:120px 1fr;align-items:start;text-decoration:none;color:inherit;padding:14px 0;border-bottom:1px solid var(--line)}.post img{aspect-ratio:4/3;object-fit:cover;border-radius:12px;width:100%}
.post h3{font-size:1.02rem;margin-bottom:4px}.post small{color:var(--mute)}
.prose{max-width:72ch;font-size:1.04rem;overflow-wrap:anywhere;min-width:0}.prose .tw{overflow-x:auto;margin:1em 0;-webkit-overflow-scrolling:touch}.prose iframe,.prose video,.prose embed{max-width:100%}.prose pre{overflow-x:auto}.prose img{border-radius:14px;margin:22px auto}.prose h2{font-size:1.5rem;margin-top:1.6em}.prose h3{margin-top:1.4em}.prose iframe{width:100%;aspect-ratio:16/9;border:0;border-radius:14px}
.prose blockquote{border-left:3px solid var(--brand);margin:1.4em 0;padding:.2em 1em;color:var(--mute)}.prose table{border-collapse:collapse;width:100%;font-size:.95rem}.prose td,.prose th{border:1px solid var(--line);padding:8px 10px}
.note-partner{margin:36px 0 0;padding:18px 22px;border-radius:14px;background:linear-gradient(135deg,rgba(184,24,40,.06),rgba(11,122,143,.07));border:1px solid var(--line);font-size:.96rem}.note-partner p{margin:0}
.meta{color:var(--mute);font-size:.9rem;display:flex;flex-wrap:wrap;gap:6px 14px}
.crumb{font-size:.85rem;color:var(--mute);margin-bottom:18px}.crumb a{color:var(--mute);text-decoration:none}.crumb a:hover{color:var(--brand)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:24px}.tags a{font-size:.8rem;padding:6px 10px;border:1px solid var(--line);border-radius:999px;color:var(--char);text-decoration:none}
/* form */
.form{background:#fff;border:1px solid var(--line);border-radius:22px;padding:26px;max-width:640px}.form label{display:block;font-weight:600;font-size:.9rem;margin:14px 0 6px;color:var(--char)}.form label:first-child{margin-top:0}
.form input,.form select,.form textarea{width:100%;min-height:46px;padding:10px 14px;border:1.5px solid var(--line);border-radius:12px;font:inherit;color:var(--ink);background:#fff}.form textarea{min-height:96px;resize:vertical}.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--holo);box-shadow:0 0 0 4px var(--glow)}
.form .row{display:grid;gap:0 14px;grid-template-columns:1fr 1fr}@media(max-width:560px){.form .row{grid-template-columns:1fr}}
.form .cta-row .btn{flex:1 1 auto;min-width:0;justify-content:center;white-space:normal}.form .ok{margin-top:14px;padding:12px 14px;border-radius:12px;background:#EAF7EE;color:#1F6F3E;font-size:.92rem;display:none}
/* hologram ngữ cảnh */
.sc{position:relative;overflow:hidden;cursor:pointer}.sc:hover .holo,.sc.on .holo{filter:drop-shadow(0 0 14px var(--glow)) brightness(1.08)}
.holo{width:100%;aspect-ratio:1.5;border-radius:14px;background:radial-gradient(60% 70% at 50% 60%,rgba(34,184,212,.14),transparent 70%),linear-gradient(#F7FAFB,#EEF4F6);display:grid;place-items:center;position:relative;margin-bottom:14px;transition:filter .3s}
.holo:before{content:"";position:absolute;inset:0;border-radius:14px;background:repeating-linear-gradient(0deg,rgba(11,122,143,.07) 0 1px,transparent 1px 4px);pointer-events:none}
.holo svg{width:64%;height:64%;overflow:visible}.holo .rg{stroke:var(--holo);fill:none;stroke-width:1.2;opacity:.55;transform-origin:50% 50%;animation:spin 14s linear infinite}.holo .rg.b{animation-duration:9s;animation-direction:reverse;stroke-dasharray:4 6}
.holo .core{fill:var(--holo-2);opacity:.9;animation:breath 2.8s ease-in-out infinite}.holo .ln{stroke:var(--holo);stroke-width:1.6;fill:none;stroke-linecap:round;stroke-dasharray:1;stroke-dashoffset:1;animation:draw 2.6s ease-in-out infinite alternate}
@keyframes spin{to{transform:rotate(360deg)}}@keyframes breath{0%,100%{opacity:.55;transform:scale(.96)}50%{opacity:1;transform:scale(1.04)}}@keyframes draw{to{stroke-dashoffset:0}}
.sc .when{font-size:.78rem;color:var(--holo);font-weight:600;letter-spacing:.06em;text-transform:uppercase}
/* CEO */
.ceo{display:grid;gap:26px;align-items:center}@media(min-width:860px){.ceo{grid-template-columns:.9fr 1.3fr}}.ceo .ph{aspect-ratio:4/5;border-radius:22px;background:linear-gradient(160deg,var(--paper),#E8EDF1);display:grid;place-items:center;color:var(--mute);overflow:hidden}.ceo .ph img{width:100%;height:100%;object-fit:cover}
.ceo blockquote{margin:0 0 18px;font-size:1.25rem;line-height:1.5;color:var(--char);font-weight:500}.ceo ul{padding-left:18px;color:var(--mute)}
/* footer */
.ft{background:#1B2126;color:#C9D1D9;padding:56px 0 28px;margin-top:40px}.ft a{color:#fff;text-decoration:none}.ft .g{display:grid;gap:28px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}.ft h4{color:#fff;font-size:.9rem;letter-spacing:.08em;text-transform:uppercase;margin-bottom:12px}.ft p,.ft li{font-size:.92rem;color:#AEB8C2}.ft ul{list-style:none;padding:0;margin:0}.ft li{margin-bottom:8px}
.ft .bot{border-top:1px solid #2A333B;margin-top:34px;padding-top:18px;font-size:.82rem;color:#7F8B96;display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between}
/* nút nổi góc phải */
.fab{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));z-index:30;display:flex;flex-direction:column;gap:10px;align-items:flex-end}.fab a{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;color:#fff;box-shadow:0 10px 24px -8px rgba(0,0,0,.35);text-decoration:none}.fab a svg{width:24px;height:24px}
.fab .z{background:#0068FF}.fab .p{background:var(--brand)}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

.b3d-wrap{position:relative}.b3d{position:relative;width:100%;aspect-ratio:1.05;max-height:560px;perspective:1300px;touch-action:none;cursor:grab;user-select:none;overflow:hidden;border-radius:26px;background:radial-gradient(70% 60% at 50% 40%,rgba(34,184,212,.14),transparent 70%),linear-gradient(#FFFFFF,#EEF3F6);border:1px solid var(--line)}
.b3d.drag{cursor:grabbing}.scene{position:absolute;left:50%;top:50%;transform-style:preserve-3d}.tower{transform-style:preserve-3d;will-change:transform}
.base{position:absolute;width:300px;height:300px;left:-150px;top:-150px;border-radius:30px;background:radial-gradient(circle at 50% 50%,rgba(11,122,143,.18),rgba(11,122,143,.02) 70%);transform:translateZ(-26px)}
.fl{position:absolute;width:260px;height:200px;left:-130px;top:-100px;border-radius:18px;transform:translateZ(calc(var(--i)*66px));transform-style:preserve-3d;background:linear-gradient(135deg,rgba(255,255,255,.96),rgba(226,240,244,.92));border:1.5px solid rgba(11,122,143,.55);box-shadow:0 0 0 1px rgba(255,255,255,.8) inset,0 2px 0 rgba(11,122,143,.25),0 34px 44px -28px rgba(11,122,143,.45)}
.fl em{position:absolute;left:10px;top:8px;font:600 10px/1 'Be Vietnam Pro',sans-serif;letter-spacing:.14em;color:var(--holo);font-style:normal;opacity:.8}
.nd{position:absolute;width:26px;height:26px;margin:-13px 0 0 -13px;border-radius:50%;background:#fff;border:1.5px solid rgba(11,122,143,.45);display:grid;place-items:center;transition:background .35s,box-shadow .35s,border-color .35s}
.nd i{width:8px;height:8px;border-radius:50%;background:rgba(11,122,143,.35);transition:background .35s,transform .35s}
.nd span{position:absolute;top:-22px;left:50%;transform:translateX(-50%);white-space:nowrap;font:600 9px/1 'Be Vietnam Pro',sans-serif;color:var(--char);background:rgba(255,255,255,.9);padding:4px 7px;border-radius:6px;opacity:0;transition:opacity .3s;pointer-events:none}
.nd.on{background:#FFF4E5;border-color:#F0A93C;box-shadow:0 0 0 6px rgba(240,169,60,.18),0 0 18px rgba(240,169,60,.55)}.nd.on i{background:#F0A93C;transform:scale(1.3)}.nd.on span{opacity:1}
.nd.on[data-k=ac]{background:#E6F6FA;border-color:#22B8D4;box-shadow:0 0 0 6px rgba(34,184,212,.18),0 0 18px rgba(34,184,212,.55)}.nd.on[data-k=ac] i{background:#22B8D4}
.nd.on[data-k=lock],.nd.on[data-k=cam]{background:#FDECEE;border-color:var(--brand-2);box-shadow:0 0 0 6px rgba(224,49,63,.16),0 0 18px rgba(224,49,63,.5)}.nd.on[data-k=lock] i,.nd.on[data-k=cam] i{background:var(--brand-2);animation:b3d-blink 1.2s ease-in-out infinite}
.nd.on[data-k=curtain]{background:#F1ECFA;border-color:#8E6BE0}.nd.on[data-k=curtain] i{background:#8E6BE0}
.nd.on[data-k=plug]{background:#EAF7EE;border-color:#3FB16B}.nd.on[data-k=plug] i{background:#3FB16B}
.walk{position:absolute;width:7px;height:7px;border-radius:50%;background:#fff;box-shadow:0 0 0 2px var(--holo),0 0 10px var(--holo);left:20%;top:50%;animation:b3d-walk 16s ease-in-out infinite}
.fl[style*="--i:1"] .walk{animation-duration:21s;animation-delay:-7s}
.pool{position:absolute;right:14px;bottom:14px;width:74px;height:40px;border-radius:12px;background:linear-gradient(120deg,#9FE0F0,#4FC3DE 40%,#9FE0F0 60%,#4FC3DE);background-size:200% 100%;animation:b3d-shimmer 5s linear infinite;opacity:.85}
.grass{position:absolute;left:14px;bottom:14px;width:70px;height:40px;border-radius:12px;background:#CFEBD6}
.grass:after{content:"";position:absolute;left:50%;top:50%;width:6px;height:6px;margin:-3px;border-radius:50%;background:#3FB16B;box-shadow:0 0 0 0 rgba(63,177,107,.5);animation:b3d-ring 2.4s ease-out infinite}
@keyframes b3d-walk{0%,100%{left:20%;top:50%}25%{left:70%;top:35%}50%{left:60%;top:75%}75%{left:30%;top:70%}}
@keyframes b3d-shimmer{to{background-position:-200% 0}}@keyframes b3d-ring{to{box-shadow:0 0 0 22px rgba(63,177,107,0)}}@keyframes b3d-blink{50%{opacity:.35}}
.hud{position:absolute;left:14px;top:12px;display:flex;align-items:center;gap:8px;font:600 12px/1 'Be Vietnam Pro',sans-serif;color:var(--char);background:rgba(255,255,255,.85);padding:8px 12px;border-radius:999px;border:1px solid var(--line);pointer-events:none}
.hud .dot{width:8px;height:8px;border-radius:50%;background:var(--holo-2);box-shadow:0 0 0 0 rgba(34,184,212,.6);animation:b3d-ring 2s ease-out infinite}
.b3d-tabs{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.b3d-tabs button{font:600 .86rem 'Be Vietnam Pro',sans-serif;padding:9px 14px;min-height:40px;border-radius:999px;border:1.5px solid var(--line);background:#fff;color:var(--char);cursor:pointer}.b3d-tabs button.on{background:var(--char);color:#fff;border-color:var(--char)}
@media(prefers-reduced-motion:reduce){.walk,.pool,.grass:after,.hud .dot{animation:none}}
/* ============================================================
   HD2 — Header + Logo + Menu | V SMART HOME (viettelsmart.com)
   Tiền tố .hd2 / .v-logo — không đụng CSS cũ.
   Luôn nền tối, đẹp trên cả trang chủ #0A1020 lẫn trang trong nền trắng.
   ============================================================ */
.hd2,.hd2 *,.hd2 *::before,.hd2 *::after,
.hd2-drawer,.hd2-drawer *,.hd2-drawer *::before,.hd2-drawer *::after{box-sizing:border-box}
.hd2 a,.hd2-drawer a{text-decoration:none;color:inherit}
.hd2 button,.hd2-drawer button{font:inherit;margin:0}

.hd2{
  --hd2-ink:#F2F6FF; --hd2-soft:#B9C3D8; --hd2-muted:#7E8AA5;
  --hd2-do:#E8474F; --hd2-cam:#F57B36; --hd2-xanh:#4DA3E8;
  position:sticky;top:0;z-index:90;
  font-family:"Be Vietnam Pro",system-ui,sans-serif;
  background:rgba(10,16,32,.96);          /* fallback không có backdrop-filter */
  border-bottom:0;
  transition:background .3s ease,box-shadow .3s ease;
}
@supports((backdrop-filter:blur(4px)) or (-webkit-backdrop-filter:blur(4px))){
  .hd2{background:rgba(10,16,32,.84);-webkit-backdrop-filter:blur(18px) saturate(1.5);backdrop-filter:blur(18px) saturate(1.5)}
  .hd2.hd2--scrolled{background:rgba(10,16,32,.93)}
}
.hd2--scrolled{box-shadow:0 14px 44px -20px rgba(0,0,0,.7)}

/* viền dưới phát sáng nhẹ gradient */
.hd2::after{
  content:"";position:absolute;left:0;right:0;bottom:-1px;height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent 2%,rgba(232,71,79,.65) 22%,rgba(245,123,54,.85) 50%,rgba(77,163,232,.65) 78%,transparent 98%);
  box-shadow:0 1px 16px rgba(245,123,54,.35),0 1px 5px rgba(77,163,232,.3);
}

.hd2-in{max-width:1220px;margin:0 auto;height:68px;padding:0 20px;display:flex;align-items:center;gap:18px}

/* hiệu ứng xuất hiện mượt */
@keyframes hd2-drop{from{transform:translateY(-14px);opacity:0}to{transform:none;opacity:1}}
.hd2-in>*{animation:hd2-drop .65s cubic-bezier(.16,1,.3,1) both}
.hd2-cta{animation-delay:.16s}
.hd2-nav a{animation:hd2-drop .55s cubic-bezier(.16,1,.3,1) both;animation-delay:calc(.1s + var(--i,0)*.04s)}

/* ---------------- LOGO ---------------- */
.v-logo{display:inline-flex;align-items:center;gap:11px;flex-shrink:0}
.v-logo__mark{position:relative;width:40px;height:40px}
.v-logo__svg{display:block;width:100%;height:100%}
.v-logo__ring,.v-logo__glow{transform-box:view-box;transform-origin:50% 50%}
.v-logo__ring--1{animation:vlg-spin 16s linear infinite}
.v-logo__ring--2{animation:vlg-spin-rev 9s linear infinite}
.v-logo__ring--3{animation:vlg-spin 5.5s linear infinite}
.v-logo__glow{animation:vlg-breathe 3.8s ease-in-out infinite}
.v-logo__node{animation:vlg-node 2.4s ease-in-out infinite}
@keyframes vlg-spin{to{transform:rotate(360deg)}}
@keyframes vlg-spin-rev{to{transform:rotate(-360deg)}}
@keyframes vlg-breathe{0%,100%{opacity:.55;transform:scale(.92)}50%{opacity:1;transform:scale(1.08)}}
@keyframes vlg-node{0%,100%{opacity:1}50%{opacity:.3}}

.v-logo__text{display:flex;flex-direction:column;line-height:1.12;min-width:0}
.v-logo__text strong{font-size:15px;font-weight:900;letter-spacing:.03em;color:var(--hd2-ink);white-space:nowrap}
.v-logo__text strong em{font-style:normal;font-weight:900;background:linear-gradient(135deg,#E8474F,#F57B36);-webkit-background-clip:text;background-clip:text;color:transparent}
.v-logo__text small{margin-top:2px;font-size:8.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--hd2-muted);white-space:nowrap}

/* ---------------- MENU DESKTOP ---------------- */
.hd2-nav{position:relative;display:flex;align-items:center;gap:2px;margin-left:auto;animation-delay:.08s}
.hd2-nav a{position:relative;z-index:1;padding:9px 11px;border-radius:999px;font-size:13px;font-weight:600;color:var(--hd2-soft);white-space:nowrap;transition:color .2s}
.hd2-nav a:hover,.hd2-nav a:focus-visible{color:#fff}

/* viên trượt theo mục đang hover */
.hd2-pill{
  position:absolute;left:0;top:50%;height:34px;margin-top:-17px;width:40px;border-radius:999px;
  background:rgba(255,255,255,.08);opacity:0;pointer-events:none;
  transition:transform .38s cubic-bezier(.22,1,.36,1),width .38s cubic-bezier(.22,1,.36,1),opacity .22s ease;
}
.hd2-pill.on{opacity:1}
.hd2-pill::after{
  content:"";position:absolute;left:13px;right:13px;bottom:2px;height:2px;border-radius:2px;
  background:linear-gradient(90deg,#E8474F,#F57B36 55%,#4DA3E8);
  box-shadow:0 0 8px rgba(245,123,54,.7);
}

/* ---------------- CTA PHẢI ---------------- */
.hd2-cta{display:flex;align-items:center;gap:10px;flex-shrink:0}
.hd2-tel{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;height:40px;padding:0 15px;border-radius:999px;
  font-size:13.5px;font-weight:800;color:var(--hd2-ink);
  border:1px solid rgba(77,163,232,.4);background:rgba(77,163,232,.09);
  transition:border-color .2s,box-shadow .2s,transform .2s;
}
.hd2-tel svg{flex-shrink:0}
.hd2-tel:hover{border-color:#4DA3E8;box-shadow:0 0 20px -6px rgba(77,163,232,.75);transform:translateY(-1px)}
.hd2-quote{
  display:inline-flex;align-items:center;justify-content:center;gap:7px;height:40px;padding:0 19px;border-radius:999px;
  font-size:13.5px;font-weight:800;color:#fff;
  background:linear-gradient(135deg,#E8474F,#F57B36);
  box-shadow:0 10px 26px -12px rgba(232,71,79,.65);
  transition:transform .2s,filter .2s,box-shadow .2s;
}
.hd2-quote::after{content:"→";font-weight:900;transition:transform .2s}
.hd2-quote:hover{transform:translateY(-1px);filter:brightness(1.07);box-shadow:0 14px 30px -12px rgba(232,71,79,.75)}
.hd2-quote:hover::after{transform:translateX(3px)}

/* burger */
.hd2-burger{
  display:none;flex-direction:column;align-items:center;justify-content:center;gap:5px;
  width:44px;height:44px;padding:0;border-radius:13px;cursor:pointer;
  border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.05);
}
.hd2-burger span{display:block;width:18px;height:2px;border-radius:2px;background:var(--hd2-ink);transition:transform .25s,opacity .2s}
.hd2-burger.on span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hd2-burger.on span:nth-child(2){opacity:0}
.hd2-burger.on span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------------- DRAWER MOBILE ---------------- */
.hd2-drawer{
  position:fixed;inset:0;z-index:120;display:flex;flex-direction:column;
  font-family:"Be Vietnam Pro",system-ui,sans-serif;
  background:rgba(7,11,22,.92);
  opacity:0;visibility:hidden;
  transition:opacity .3s ease,visibility 0s linear .3s;
}
@supports((backdrop-filter:blur(4px)) or (-webkit-backdrop-filter:blur(4px))){
  .hd2-drawer{background:rgba(7,11,22,.74);-webkit-backdrop-filter:blur(22px) saturate(1.4);backdrop-filter:blur(22px) saturate(1.4)}
}
.hd2-drawer.open{opacity:1;visibility:visible;transition:opacity .3s ease}

.hd2-drawer__top{display:flex;align-items:center;justify-content:space-between;height:62px;padding:0 20px;flex-shrink:0}
.hd2-drawer__brand{font-size:15px;font-weight:900;letter-spacing:.03em;color:#F2F6FF}
.hd2-drawer__brand em{font-style:normal;background:linear-gradient(135deg,#E8474F,#F57B36);-webkit-background-clip:text;background-clip:text;color:transparent}
.hd2-drawer__close{
  display:grid;place-items:center;width:48px;height:48px;border-radius:14px;cursor:pointer;
  border:1px solid rgba(255,255,255,.18);background:rgba(255,255,255,.05);color:#F2F6FF;
}
.hd2-drawer__close:active{background:rgba(255,255,255,.12)}

.hd2-drawer__nav{flex:1;overflow-y:auto;padding:10px 26px;display:flex;flex-direction:column;counter-reset:hd2m}
.hd2-drawer__nav a{
  display:flex;align-items:center;gap:16px;min-height:52px;padding:12px 2px;
  font-size:23px;font-weight:800;color:#F2F6FF;
  border-bottom:1px dashed rgba(255,255,255,.09);
  opacity:0;transform:translateY(16px);
  transition:opacity .4s ease,transform .45s cubic-bezier(.16,1,.3,1);
}
.hd2-drawer__nav a::before{
  counter-increment:hd2m;content:"0" counter(hd2m);
  font-size:11px;font-weight:800;letter-spacing:.18em;color:#F57B36;opacity:.9;
}
.hd2-drawer__nav a:active{color:#F57B36}
.hd2-drawer.open .hd2-drawer__nav a{opacity:1;transform:none;transition-delay:calc(.05s + var(--i,0)*.045s)}

.hd2-drawer__cta{flex-shrink:0;display:grid;gap:11px;padding:16px 26px calc(22px + env(safe-area-inset-bottom,0px))}
.hd2-drawer__cta a{display:flex;align-items:center;justify-content:center;gap:9px;height:52px;border-radius:999px;font-size:15.5px;font-weight:800}
.hd2-drawer__tel{color:#F2F6FF;border:1px solid rgba(77,163,232,.45);background:rgba(77,163,232,.1)}
.hd2-drawer__quote{color:#fff;background:linear-gradient(135deg,#E8474F,#F57B36);box-shadow:0 12px 30px -12px rgba(232,71,79,.7)}

/* ---------------- RESPONSIVE ---------------- */
@media(max-width:1479px){
  .hd2-nav{gap:0}
  .hd2-nav a{padding:9px 8px;font-size:12.5px}
  .hd2-tel{width:40px;padding:0}
  .hd2-tel [data-vs="hotline"]{display:none}
}
@media(max-width:1080px){
  .hd2-in{height:62px;gap:12px}
  .hd2-nav,.hd2-quote{display:none}
  .hd2-burger{display:flex}
  .hd2-tel{width:44px;height:44px}
}
@media(max-width:420px){
  .v-logo__text small{display:none}
  .v-logo__text strong{font-size:14px}
}

/* ---------------- REDUCED MOTION ---------------- */
@media(prefers-reduced-motion:reduce){
  .v-logo__ring--1,.v-logo__ring--2,.v-logo__ring--3,.v-logo__glow,.v-logo__node{animation:none}
  .hd2-in>*,.hd2-nav a{animation:none}
  .hd2,.hd2-pill,.hd2-tel,.hd2-quote,.hd2-quote::after,.hd2-burger span,
  .hd2-drawer,.hd2-drawer__nav a{transition:none}
  .hd2-drawer__nav a{opacity:1;transform:none}
}