:root{
  --red:#9b1c31; --red-dark:#6e1222; --rose:#e8a3b5;
  --pink:#f6d5dc; --pink-soft:#fbeaee; --cream:#fffafa;
  --gold:#e0a93b; --gold-dark:#a87414; --ink:#3a1a20; --muted:#7d5a62; --line:#e8c9d0;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:'Montserrat',system-ui,sans-serif;font-weight:400;color:var(--ink);background:var(--cream);line-height:1.55}
h1,h2,h3{font-family:'Playfair Display',Georgia,serif;font-weight:600}
a{color:inherit;text-decoration:none}
section{padding:70px 6vw;scroll-margin-top:64px}
#top{scroll-margin-top:0}
h2{color:var(--red);font-size:clamp(1.8rem,3.2vw,2.5rem);line-height:1.2;margin:0 0 10px}

/* HERO */
.hero{position:relative;min-height:100vh;display:block;padding:0;color:#fff;overflow:hidden;
  background:linear-gradient(135deg,#4a0b17,var(--red) 55%,#c9506a)}
.hero::before{content:'';position:absolute;inset:0;z-index:2;pointer-events:none;
  background:linear-gradient(90deg,#3a0610d9 0%,#3a061070 50%,#3a061026 100%),
             linear-gradient(0deg,#3a0610cc 0%,transparent 40%),
             linear-gradient(180deg,#3a061099 0%,transparent 22%)}
.hero-slides{position:absolute;inset:0;z-index:0}
.slide{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;opacity:0;
  animation:slide 28s infinite;will-change:opacity,transform}
/* Slide đầu bắt đầu ở trạng thái đã hiện (-1.4s = đúng thời điểm 5% của keyframes) để ảnh LCP xuất hiện ngay */
.slide:first-child{animation-delay:-1.4s}
/* Điện thoại: mỗi slide có điểm lấy nét riêng (--pm) để không cắt mất rồng/phượng */
@media (max-width:600px){.slide{object-position:var(--pm,center)}}
.slide:nth-child(2){animation-delay:7s}.slide:nth-child(3){animation-delay:14s}.slide:nth-child(4){animation-delay:21s}
@keyframes slide{
  0%{opacity:0;transform:scale(1.02)}
  5%{opacity:1}
  25%{opacity:1}
  32%{opacity:0;transform:scale(1.14)}
  100%{opacity:0;transform:scale(1.14)}
}
.petals{position:absolute;inset:0;z-index:3;pointer-events:none;overflow:hidden}
.petal{position:absolute;top:-6vh;width:var(--s);height:calc(var(--s)*1.3);border-radius:70% 0 70% 0;
  background:linear-gradient(135deg,#ffc4d1,#f06a89);opacity:.8;
  animation:fall var(--t) linear var(--dl) infinite}
@keyframes fall{
  0%{transform:translate3d(0,0,0) rotate(0)}
  50%{transform:translate3d(var(--x),55vh,0) rotate(200deg)}
  100%{transform:translate3d(calc(var(--x)*-.5),112vh,0) rotate(420deg)}
}
.progress{position:fixed;top:0;left:0;height:3px;width:100%;z-index:60;transform-origin:left;transform:scaleX(0);
  background:linear-gradient(90deg,#ffb3c4,#ff5b7f,#ffd36b)}
.hero-main{position:relative;z-index:4;min-height:100vh;padding:110px 6vw 40px;display:flex;flex-direction:column;justify-content:flex-end}

/* THANH MENU NGANG */
.topbar{position:fixed;top:0;left:0;right:0;z-index:50;height:64px;padding:0 6vw;display:flex;align-items:center;justify-content:space-between;
  color:#fff;background:transparent;transition:background .35s,box-shadow .35s,color .35s,height .35s}
.topbar.scrolled{background:#fffafaf2;backdrop-filter:blur(8px);color:var(--ink);box-shadow:0 2px 14px #6e12221f;height:58px}
.brand{font-family:'Playfair Display',Georgia,serif;font-size:1.6rem;font-weight:600;transition:color .3s}
.topbar.scrolled .brand{color:var(--red)}
.topbar nav{display:flex;align-items:center;gap:30px;font-size:.92rem}
.topbar nav a:not(.nav-cta){position:relative;padding:6px 0;opacity:.9;transition:color .25s,opacity .25s}
.topbar nav a:not(.nav-cta)::after{content:'';position:absolute;left:0;right:0;bottom:0;height:2px;background:currentColor;
  transform:scaleX(0);transform-origin:left;transition:transform .3s ease}
.topbar nav a:not(.nav-cta).active{opacity:1}
.topbar nav a:not(.nav-cta).active::after{transform:scaleX(1)}
/* Chỉ gạch chân khi rê chuột ở thiết bị thật sự có chuột (tránh :hover "dính" sau khi chạm trên điện thoại) */
@media (hover:hover){
  .topbar nav a:not(.nav-cta):hover{opacity:1}
  .topbar nav a:not(.nav-cta):hover::after{transform:scaleX(1)}
}
.topbar.scrolled nav a.active{color:var(--red)}
.nav-cta{padding:9px 20px;border-radius:22px;background:var(--red);color:#fff;font-weight:400;transition:transform .2s,background .2s}
.nav-cta:hover{background:var(--red-dark);transform:translateY(-1px)}
.topbar:not(.scrolled) .nav-cta{background:#fff;color:var(--red)}
.burger{display:none;background:none;border:0;color:inherit;cursor:pointer;width:40px;height:40px;position:relative}
.burger span{position:absolute;left:9px;right:9px;height:2px;background:currentColor;border-radius:2px;transition:.3s}
.burger span:nth-child(1){top:13px}.burger span:nth-child(2){top:19px}.burger span:nth-child(3){top:25px}
.burger[aria-expanded=true] span:nth-child(1){top:19px;transform:rotate(45deg)}
.burger[aria-expanded=true] span:nth-child(2){opacity:0}
.burger[aria-expanded=true] span:nth-child(3){top:19px;transform:rotate(-45deg)}

/* HIỆU ỨNG HIỆN KHI CUỘN */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease var(--d,0s),transform .7s ease var(--d,0s)!important}
.reveal.in{opacity:1;transform:none}
.grid>.card{animation:rise .6s ease backwards}
.grid>.card:nth-child(2){animation-delay:.08s}.grid>.card:nth-child(3){animation-delay:.16s}
.grid>.card:nth-child(4){animation-delay:.24s}.grid>.card:nth-child(5){animation-delay:.32s}.grid>.card:nth-child(6){animation-delay:.4s}
@keyframes rise{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:none}}
.hero-text,.card-contact{animation:rise .9s ease both}
.card-contact{animation-delay:.2s}
.btn:active,.nav-cta:active,.filters button:active{transform:scale(.96)}
.filters button{transition:.2s}.filters button:hover{background:var(--pink-soft)}
.filters button.active:hover{background:var(--red-dark)}
.explore span{transition:transform .25s,background .25s}
.explore:hover span{transform:translateX(5px);background:#fff3}
.paused .slide,.paused .petal,.hero.offscreen .slide,.hero.offscreen .petal{animation-play-state:paused}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .reveal{opacity:1;transform:none;transition:none}
  .grid>.card,.hero-text,.card-contact,.contact{animation:none}
  .slide{animation:none}.slide:first-child{opacity:1}
  .petals{display:none}
}
.hero-text{margin:auto 0 40px}
.hero-text h1{font-size:clamp(2.6rem,6.4vw,5.2rem);line-height:1.08;margin:0;text-shadow:0 4px 30px #0006;
  background:linear-gradient(100deg,#fff 20%,#ffd9e2 55%,#ffe9a8 90%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-text p{margin-top:22px;max-width:440px;font-size:1.1rem;color:#fde8ec}
.explore{display:inline-flex;align-items:center;gap:12px;font-size:.9rem}
.explore span{width:40px;height:40px;border:1px solid #fff;border-radius:50%;display:grid;place-items:center}

/* Thẻ liên hệ trong hero */
.card-contact{position:absolute;right:6vw;top:50%;margin-top:-170px;width:330px;background:var(--cream);color:var(--ink);
  border-radius:10px;padding:28px;box-shadow:0 20px 50px #0004}
.card-contact .eyebrow{font-family:'Playfair Display',Georgia,serif;font-size:1.1rem;color:var(--muted)}
.card-contact h2{font-size:2rem;margin:2px 0 8px}
.card-contact p{font-size:.85rem;color:var(--muted);margin:0 0 18px}
.card-contact .btn{display:block;text-align:center;width:100%}
.btn-ghost{display:block;text-align:center;margin-top:10px;padding:12px;border:1px solid var(--red);border-radius:24px;color:var(--red);font-size:.9rem}
.btn-ghost:hover{background:var(--pink-soft)}

.btn{display:inline-block;background:var(--red);color:#fff;border:0;padding:14px 26px;border-radius:24px;cursor:pointer;font:inherit;font-size:.95rem;font-weight:400;transition:.2s}
.btn:hover{background:var(--red-dark)}

.divider{display:flex;align-items:center;justify-content:center;gap:14px;margin:0 auto 46px;color:var(--red);max-width:300px}
.divider::before,.divider::after{content:'';flex:1;height:1px;background:var(--line)}

/* TONE VÀ Ý TƯỞNG */
.tone{text-align:center;position:relative;overflow:hidden;
  background:radial-gradient(circle at 5% 8%,#f9c7d3 0,transparent 28%),
             radial-gradient(circle at 95% 40%,#ffe3a8 0,transparent 24%),
             radial-gradient(circle at 20% 95%,#cfe5c4 0,transparent 26%),var(--cream)}
.tone .lead{max-width:560px;margin:0 auto 34px}
.palette{display:flex;justify-content:center;gap:18px;flex-wrap:wrap;margin-bottom:44px}
.swatch{width:180px;height:140px;border-radius:16px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end;padding:16px;text-align:left;
  background:linear-gradient(160deg,#ffffff40,transparent 55%),var(--c);box-shadow:0 10px 26px #3a1a2030;transition:transform .35s,box-shadow .35s}
.swatch:hover{transform:translateY(-8px) rotate(-1.5deg);box-shadow:0 18px 34px #3a1a2040}
.swatch span{font-family:'Playfair Display',Georgia,serif;font-size:1.5rem;font-weight:600;line-height:1.1}
.swatch small{font-size:.8rem;opacity:.9}
.swatch.light{color:var(--ink);border:1px solid var(--line)}
.ideas{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;max-width:1100px;margin:auto}
.idea{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;text-align:left;cursor:zoom-in;
  box-shadow:0 8px 24px #9b1c3114;transition:transform .35s,box-shadow .35s}
.idea:hover{transform:translateY(-8px);box-shadow:0 20px 40px #9b1c3130}
.idea .thumb{display:block;width:100%;height:210px;object-fit:cover;transition:transform .8s ease}
.idea{position:relative}
.idea .thumb-wrap{overflow:hidden}
.idea:hover .thumb{transform:scale(1.08)}
.idea .txt{position:relative;background:#fff;padding:18px 22px 24px}
.idea h3{font-size:1.5rem;color:var(--red);margin:0}
.idea p{font-size:.9rem;color:var(--muted);margin:6px 0 0}

/* DỊCH VỤ + DỰ ÁN (dữ liệu từ API) */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:22px}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;box-shadow:0 6px 20px #9b1c310f;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:0 14px 30px #9b1c3126}
#dich-vu{position:relative;overflow:hidden;
  background:radial-gradient(circle at 92% 12%,#fbd3dd 0,transparent 30%),radial-gradient(circle at 4% 90%,#ffe9b8 0,transparent 28%),var(--cream)}
#tham-khao{position:relative;
  background:linear-gradient(180deg,#fff 0%,#fdeff2 100%)}
#tham-khao .grid{grid-template-columns:repeat(auto-fill,minmax(280px,1fr))}
#tham-khao .card{cursor:zoom-in;border-radius:16px}
#tham-khao .card .imgbox{position:relative;overflow:hidden}
#tham-khao .card img{aspect-ratio:3/2;transition:transform .8s ease}
#tham-khao .card:hover img{transform:scale(1.1)}
#tham-khao .card .imgbox::after{content:'🔍 Xem ảnh lớn';position:absolute;inset:auto 0 0 0;padding:34px 0 12px;text-align:center;color:#fff;font-size:.85rem;
  background:linear-gradient(0deg,#3a0610cc,transparent);opacity:0;transform:translateY(10px);transition:.35s}
#tham-khao .card:hover .imgbox::after{opacity:1;transform:none}
.service{transition:transform .35s,box-shadow .35s,background .35s}
.service:hover .icon{transform:scale(1.15) rotate(-6deg)}
.service .icon{transition:transform .35s}
.card img{width:100%;height:auto;aspect-ratio:3/2;object-fit:cover;display:block;background:var(--pink-soft)}
.card .body{padding:16px 18px 20px}
.card h3{margin:0 0 6px;font-size:1.4rem;color:var(--red)}
.card .meta{font-size:.82rem;color:var(--muted)}
.card p{font-size:.9rem;color:var(--muted)}
.service{padding:24px;text-align:center}
.service .icon{width:64px;height:64px;margin:0 auto 10px;display:grid;place-items:center;border-radius:50%;background:var(--pink-soft);color:var(--red)}
.service .icon svg{display:block}
.service:hover .icon{background:#fff2c9;color:var(--gold-dark)}
.service.featured:hover .icon{background:#ffffff22;color:#ffd36b}
.filters{margin-bottom:20px;display:flex;gap:8px;flex-wrap:wrap}
.filters button{border:1px solid var(--rose);background:#fff;padding:7px 16px;border-radius:20px;cursor:pointer;font:inherit;font-size:.85rem}
.filters button.active{background:var(--red);color:#fff;border-color:var(--red)}
.muted{color:var(--muted)}

/* LIÊN HỆ */
.contact{position:relative;overflow:hidden;padding:90px 6vw 28px;color:#fff;
  background:radial-gradient(circle at 88% 0%,#c9506a55 0,transparent 45%),radial-gradient(circle at 0% 100%,#d9a44122 0,transparent 40%),linear-gradient(135deg,var(--red-dark),#3f0914)}
.contact-box{max-width:1080px;margin:0 auto;display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.contact h2{color:#fff;font-size:clamp(2rem,3.6vw,2.8rem);line-height:1.15;margin:8px 0 0}
.contact .bar{margin:18px 0 20px}
.contact-text>p{color:#f3d7dd;font-size:.95rem;max-width:460px;margin:0 0 22px}
.checklist-title{color:#fff!important;font-weight:600;margin-bottom:10px!important}
.checklist{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.checklist li{position:relative;padding-left:30px;color:#f3d7dd;font-size:.92rem}
.checklist li::before{content:'✓';position:absolute;left:0;top:1px;width:20px;height:20px;border-radius:50%;background:var(--gold);color:#3a1a20;font-size:.72rem;font-weight:700;display:grid;place-items:center}
.contact-card{background:#ffffff12;border:1px solid #ffffff30;border-radius:20px;padding:30px;backdrop-filter:blur(10px);box-shadow:0 24px 60px #0004}
.contact-card h3{color:#fff;font-size:1.35rem;margin:0 0 18px}
.channel{display:flex;align-items:center;gap:16px;padding:16px 18px;border-radius:14px;background:#fff;color:var(--ink);margin-top:12px;
  transition:transform .25s,box-shadow .25s}
.channel:hover{transform:translateX(6px);box-shadow:0 14px 30px #0004}
.ch-ico{flex:none;width:46px;height:46px;border-radius:12px;display:grid;place-items:center;color:#fff}
.zalo-ico{background:#0068ff}.call-ico{background:var(--red)}
.ch-txt{flex:1;display:flex;flex-direction:column;line-height:1.3}
.ch-txt b{font-size:1rem;font-weight:600}
.ch-txt small{font-size:.82rem;color:var(--muted)}
.ch-go{color:var(--red);font-size:1.3rem;transition:transform .25s}
.channel:hover .ch-go{transform:translateX(4px)}
.copy{max-width:1080px;margin:64px auto 0;padding-top:18px;border-top:1px solid #ffffff22;font-size:.8rem;color:#e7b9c3;text-align:center}

/* ĐIỂM NHẤN: tiêu đề mục, chữ nổi bật, thẻ nổi bật */
.sec-head{margin-bottom:30px}
.sec-head h2{margin:6px 0 0}
.kicker-gold{display:inline-block;font-size:.78rem;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--gold-dark)}
.contact .kicker-gold{color:var(--gold)}
.bar{display:block;width:64px;height:4px;border-radius:4px;margin-top:14px;background:linear-gradient(90deg,var(--red),var(--gold))}
.tone .bar{margin-left:auto;margin-right:auto}.tone .sec-head{text-align:center}
.hero-text mark{background:none;color:#ffd36b;font-weight:600;border-bottom:2px solid #ffd36b66}
.chips{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:34px}
.chips button{padding:10px 22px;border-radius:30px;border:1px solid var(--rose);background:#fff;color:var(--ink);font:inherit;font-size:.88rem;font-weight:500;cursor:pointer;transition:.25s}
.chips button:hover{border-color:var(--red);color:var(--red);transform:translateY(-2px)}
.chips button.active{background:var(--red);color:#fff;border-color:var(--red);box-shadow:0 8px 18px #9b1c313a}
#projects{min-height:300px}
.cat{margin-bottom:56px;scroll-margin-top:84px}
.cat:last-child{margin-bottom:0}
.cat-head{display:flex;align-items:center;gap:14px;margin-bottom:20px}
.cat-head h3{margin:0;font-size:1.7rem;color:var(--red)}
.cat-head .count{font-size:.78rem;font-weight:600;color:#3a1a20;background:var(--gold);padding:3px 12px;border-radius:20px}
.cat-head::after{content:'';flex:1;height:1px;background:linear-gradient(90deg,var(--line),transparent)}
.service{position:relative;border-top:3px solid transparent}
.service:hover{border-top-color:var(--gold)}
.service.featured{background:linear-gradient(160deg,var(--red),var(--red-dark));color:#fff;border-color:var(--red-dark);box-shadow:0 16px 36px #9b1c3150}
.service.featured h3{color:#fff}.service.featured p{color:#f6d9df}
.service.featured .icon{background:#ffffff22;color:#ffd36b}
.service .badge{position:absolute;top:12px;right:12px;background:var(--gold);color:#3a1a20;font-size:.68rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:20px}
.card-top{display:none}
.lead{color:var(--muted);margin:0 0 30px;text-align:center}
/* Zalo: giữ xanh nhận diện nhưng đậm hơn để hài hòa với đỏ rượu/vàng và đủ tương phản (>= 4.5:1) */
:root{--zalo:#0057d9;--zalo-dark:#0046b3}
.zalo-link{background:var(--zalo);color:#fff}
.zalo-link:hover{background:var(--zalo-dark)}
.topbar .nav-cta.zalo-link,.topbar:not(.scrolled) .nav-cta.zalo-link{background:var(--zalo);color:#fff}
.topbar:not(.scrolled) .nav-cta.zalo-link{box-shadow:0 0 0 1px #ffffff80}
.topbar .nav-cta.zalo-link:hover{background:var(--zalo-dark)}
.channel.zalo-link{background:var(--zalo);color:#fff}
.channel.zalo-link:hover{background:var(--zalo-dark)}
.channel.zalo-link .ch-txt small{color:#e3edff}
.channel.zalo-link .ch-go{color:#fff}
.channel.zalo-link .zalo-ico{background:#fff;color:var(--zalo)}
.hero-cta{display:flex;align-items:center;gap:26px;flex-wrap:wrap}

/* LIGHTBOX */
.lightbox{position:fixed;inset:0;z-index:100;display:grid;place-items:center;background:#1c0409ee;backdrop-filter:blur(6px);
  opacity:0;visibility:hidden;transition:opacity .3s,visibility .3s}
.lightbox.open{opacity:1;visibility:visible}
.lightbox img{max-width:92vw;max-height:80vh;border-radius:10px;box-shadow:0 30px 80px #000a;transform:scale(.94);transition:transform .35s}
.lightbox.open img{transform:none}
.lightbox .cap{position:absolute;bottom:4vh;left:0;right:0;text-align:center;color:#fde8ec;font-family:'Playfair Display',Georgia,serif;font-size:1.4rem;padding:0 60px}
.lightbox button{position:absolute;background:#ffffff1f;color:#fff;border:0;width:46px;height:46px;border-radius:50%;font-size:1.5rem;cursor:pointer;transition:.2s}
.lightbox button:hover{background:#ffffff4d;transform:scale(1.1)}
.lb-close{top:20px;right:20px}.lb-prev{left:20px;top:50%}.lb-next{right:20px;top:50%}

/* ===== BÀN PHÍM: vòng focus rõ ràng ===== */
:focus-visible{outline:3px solid var(--red);outline-offset:3px}
/* nền tối: dùng vàng sáng để vòng focus đạt tương phản >= 3:1 */
.hero :focus-visible,.contact :focus-visible,.lightbox :focus-visible,.topbar:not(.scrolled) :focus-visible{outline-color:#ffd36b}
.card[tabindex]:focus-visible,.idea[tabindex]:focus-visible{outline-offset:4px}
.burger:focus-visible{border-radius:8px}

footer{text-align:center;padding:26px;background:var(--red-dark);color:var(--pink);font-size:.85rem}

/* ===== VÙNG BẤM >= 44px (điện thoại / màn hình cảm ứng) ===== */
@media (max-width:900px),(pointer:coarse){
  .burger{width:44px;height:44px}
  .burger span{left:11px;right:11px}
  .burger span:nth-child(1){top:14px}.burger span:nth-child(2){top:21px}.burger span:nth-child(3){top:28px}
  .burger[aria-expanded=true] span:nth-child(1),.burger[aria-expanded=true] span:nth-child(3){top:21px}
  .brand{display:inline-flex;align-items:center;min-height:44px}
  .nav-cta{display:inline-flex;align-items:center;justify-content:center;min-height:44px}
  .topbar nav a:not(.nav-cta){display:flex;align-items:center;min-height:48px}
  .btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px}
  .explore{min-height:44px}
  .explore span{width:44px;height:44px}
  .chips button{min-height:44px}
  .lightbox button{width:48px;height:48px}
  .channel{min-height:64px}
}

@media(max-width:900px){
  .topbar:not(.scrolled) nav.open :focus-visible{outline-color:var(--red)}
  .contact-box{grid-template-columns:1fr;gap:34px}
  .contact{padding-top:70px}
  .hero-main{padding:90px 24px 32px;justify-content:flex-end}
  .card-contact{position:static;width:100%;margin-top:30px}
  .burger{display:block}
  .topbar nav{position:absolute;top:100%;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:var(--cream);color:var(--ink);padding:8px 6vw 18px;box-shadow:0 12px 24px #6e12222e;
    opacity:0;visibility:hidden;transform:translateY(-8px);transition:.25s}
  .topbar nav.open{opacity:1;visibility:visible;transform:none}
  .topbar nav a:not(.nav-cta){padding:14px 0;border-bottom:1px solid var(--line)}
  .topbar nav a.active{color:var(--red)}
  .topbar .nav-cta,.topbar:not(.scrolled) .nav-cta{margin-top:14px;text-align:center;background:var(--red);color:#fff}
}

/* ===== NÚT KÊU GỌI NHẮN TIN (tăng chuyển đổi) ===== */
.channel[hidden]{display:none}
.fb-ico{background:#1877f2}
.channel.fb-link{background:#fff}

/* Nút chính có vệt sáng quét qua định kỳ để thu hút ánh nhìn */
.btn{position:relative;overflow:hidden}
.btn::after{content:'';position:absolute;top:0;left:-70%;width:40%;height:100%;pointer-events:none;
  background:linear-gradient(100deg,transparent,#ffffff59,transparent);transform:skewX(-20deg);animation:shine 5s ease-in-out infinite}
@keyframes shine{0%,70%{left:-70%}100%{left:160%}}

/* Dải kêu gọi cuối mục Tham khảo */
.cta-strip{margin-top:48px;display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;
  padding:28px 34px;border-radius:22px;color:#fff;position:relative;overflow:hidden;
  background:radial-gradient(circle at 100% 0,#e0a93b55 0,transparent 45%),linear-gradient(120deg,var(--red),var(--red-dark));
  box-shadow:0 20px 44px #6e122244}
.cta-text{display:flex;flex-direction:column;gap:6px;flex:1 1 320px}
.cta-text b{font-family:'Playfair Display',Georgia,serif;font-size:1.5rem;font-weight:600;line-height:1.25}
.cta-text span{color:#f6d9df;font-size:.92rem;max-width:520px}
.cta-strip .btn{background:var(--zalo);color:#fff;padding:15px 28px;font-weight:600;box-shadow:0 10px 24px #0004}
.cta-strip .btn:hover{background:var(--zalo-dark)}

/* "Hỏi giá mẫu này" trong thẻ mẫu */
.card .ask{display:inline-flex;align-items:center;gap:6px;margin-top:4px;font-size:.86rem;font-weight:600;color:var(--red);min-height:44px}
.card .ask span{transition:transform .25s}
.card .ask:hover{text-decoration:underline}
.card .ask:hover span{transform:translateX(5px)}

/* Nút CTA trong lightbox */
.lb-cta{position:absolute;top:22px;left:22px;z-index:2;padding:12px 20px;border-radius:30px;font-size:.9rem;font-weight:600;color:#fff;
  background:var(--zalo);box-shadow:0 10px 24px #0005;transition:transform .2s,background .2s}
.lb-cta:hover{background:var(--zalo-dark);transform:translateY(-2px)}

/* Nút liên hệ nổi */
.float-cta{position:fixed;right:22px;bottom:22px;z-index:70;display:flex;flex-direction:column;align-items:flex-end;gap:10px;
  opacity:0;visibility:hidden;transform:translateY(18px);transition:opacity .35s,transform .35s,visibility .35s}
.float-cta.show{opacity:1;visibility:visible;transform:none}
.fc{display:inline-flex;align-items:center;justify-content:center;gap:10px;min-height:48px;padding:0 22px;border-radius:30px;
  font-weight:600;font-size:.92rem;color:#fff;box-shadow:0 12px 28px #0004;transition:transform .2s,background .2s}
.fc:hover{transform:translateY(-3px)}
.fc-zalo{background:var(--zalo);position:relative}
.fc-zalo:hover{background:var(--zalo-dark)}
.fc-zalo::before{content:'';position:absolute;inset:0;border-radius:30px;border:2px solid var(--zalo);animation:ring 2.4s ease-out infinite;pointer-events:none}
@keyframes ring{0%{transform:scale(1);opacity:.7}80%,100%{transform:scale(1.25,1.5);opacity:0}}
.fc-call{background:var(--red);min-height:44px;font-weight:500}
.fc-call:hover{background:var(--red-dark)}
@media (max-width:900px){
  /* điện thoại: thanh liên hệ dính ở đáy màn hình, dễ chạm bằng ngón cái */
  .float-cta{left:0;right:0;bottom:0;flex-direction:row;gap:10px;padding:10px 14px calc(10px + env(safe-area-inset-bottom));
    background:#fffafaf5;backdrop-filter:blur(8px);box-shadow:0 -6px 20px #6e122226}
  .fc{flex:1;border-radius:14px;min-height:50px}
  .fc-zalo::before{border-radius:14px}
  .fc-call{flex:0 0 36%}
  .contact{padding-bottom:96px}
  .cta-strip{padding:24px 22px}
  .lb-cta{top:14px;left:14px;padding:10px 16px;font-size:.84rem}
}
@media (prefers-reduced-motion:reduce){
  .btn::after,.fc-zalo::before{animation:none}
  .float-cta{transition:none}
}