/* ============================================================
   SAM — Shared stylesheet for product landing pages
   Kế thừa design system của index.html (Industrial Japanese B2B)
   ============================================================ */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:80px}
:root{
  --p:#1B6FB3;--pd:#155A92;--pdd:#0F4C7E;
  --teal:#17B0C4;--teal-d:#129AAC;
  --dark:#0F2A45;--dark2:#0A2036;
  --slate:#475569;--text:#1F2937;--gray:#6B7280;
  --bg:#fff;--soft:#EFF6FC;--border:#E5E7EB;--light:#F3F4F6;
  --max:1240px;--px:clamp(1.1rem,4vw,2.5rem);
  --s1:0 1px 3px rgba(15,42,69,.07);
  --s2:0 8px 24px rgba(15,42,69,.09);
  --s3:0 18px 50px rgba(15,42,69,.14);
  --r6:6px;--r10:10px;--r14:14px;--r18:18px;--rpill:50px;
  --dur-instant:150ms;--dur-fast:250ms;--dur-normal:400ms;
}
body{font-family:'Inter',sans-serif;font-size:16px;line-height:1.65;color:var(--text);background:var(--bg);overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
:focus-visible{outline:3px solid var(--p);outline-offset:3px;border-radius:3px}
ul{list-style:none}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.02em}

.container{max-width:var(--max);margin:0 auto;padding:0 var(--px);overflow-x:clip}
.sec{padding:clamp(70px,7vw,100px) 0}
.sec--alt{background:var(--light)}
.sec--soft{background:var(--soft)}
.sec--dark{background:var(--dark);color:#fff}

.eyebrow{display:inline-flex;align-items:center;gap:.5rem;font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.13em;color:var(--p);margin-bottom:.8rem}
.eyebrow::before{content:"";width:24px;height:2px;background:var(--p);display:inline-block}
.eyebrow--teal{color:var(--teal)}
.eyebrow--teal::before{background:var(--teal)}
.eyebrow--white{color:rgba(255,255,255,.8)}
.eyebrow--white::before{background:rgba(255,255,255,.5)}
.eyebrow--c{justify-content:center}
.sec-head{max-width:660px;margin:0 auto clamp(2rem,4vw,3.2rem);text-align:center}
.sec-head h2{font-size:clamp(1.65rem,3.4vw,2.5rem);font-weight:700;margin-bottom:.85rem}
.sec-head p{color:var(--gray);font-size:1rem}
.sec-head--dark h2{color:#fff}
.sec-head--dark p{color:rgba(255,255,255,.72)}
.lede-h2{font-size:clamp(1.55rem,3vw,2.3rem);font-weight:700;margin:.4rem 0 1rem}
.lede-p{color:var(--gray);margin-bottom:1.8rem;line-height:1.75}

/* ── BUTTONS ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.82rem 1.85rem;font-family:'Inter',sans-serif;font-size:.92rem;font-weight:600;border-radius:var(--rpill);border:2px solid transparent;cursor:pointer;transition:.25s cubic-bezier(.4,0,.2,1);white-space:nowrap;min-height:44px}
.btn svg{width:16px;height:16px}
.btn--p{background:var(--p);color:#fff;box-shadow:0 8px 20px rgba(27,111,179,.28)}
.btn--p:hover{background:var(--pd);transform:translateY(-2px);box-shadow:0 12px 26px rgba(27,111,179,.38)}
.btn--teal{background:var(--teal);color:#fff}
.btn--teal:hover{background:var(--teal-d);transform:translateY(-2px)}
.btn--ghost{background:#fff;color:var(--p);border-color:var(--border)}
.btn--ghost:hover{border-color:var(--p);transform:translateY(-2px)}
.btn--ow{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.btn--ow:hover{background:#fff;color:var(--p)}
.btn--w{background:#fff;color:var(--p)}
.btn--w:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(0,0,0,.18)}
.btn--lg{padding:1rem 2.2rem;font-size:1rem}
.btn--full{width:100%}

/* ── TOPBAR ── */
.topbar{background:var(--dark2);color:rgba(255,255,255,.8);font-size:.8rem}
.topbar__i{display:flex;justify-content:space-between;align-items:center;height:40px;gap:1rem}
.topbar__l{display:flex;gap:1.5rem;flex-wrap:wrap}
.topbar__l span{display:inline-flex;align-items:center;gap:.4rem}
.topbar__l svg{width:13px;height:13px;color:var(--teal)}
.topbar__r{display:flex;gap:.35rem}
.topbar__r a{width:24px;height:24px;display:grid;place-items:center;border-radius:50%;background:rgba(255,255,255,.1);transition:.2s}
.topbar__r a:hover{background:var(--p)}
.topbar__r svg{width:12px;height:12px}
@media(max-width:860px){.topbar{display:none}}

/* ── HEADER ── */
.header{position:sticky;top:0;z-index:100;background:#fff;box-shadow:var(--s1);transition:.3s}
.header.scrolled{box-shadow:var(--s2)}
.header__i{display:flex;align-items:center;justify-content:space-between;height:78px;transition:height .3s}
.header.scrolled .header__i{height:66px}
.logo{display:flex;align-items:center;gap:.65rem}
.logo__m{width:44px;height:44px;flex-shrink:0;border-radius:var(--r10);background:linear-gradient(135deg,var(--p),var(--pdd));display:grid;place-items:center;color:#fff;font-weight:700;font-size:1.2rem;box-shadow:0 6px 14px rgba(27,111,179,.3)}
.logo__t b{font-weight:700;font-size:1.25rem;color:var(--text);display:block;line-height:1.05;letter-spacing:-.01em}
.logo__t small{font-size:.65rem;letter-spacing:.12em;text-transform:uppercase;color:var(--gray);font-weight:600}
.nav{display:flex;align-items:center;gap:.25rem}
.nav a{padding:.55rem .9rem;font-size:1.08rem;font-weight:600;color:var(--text);border-radius:var(--r6);position:relative;transition:.2s}
.nav a::after{content:"";position:absolute;left:.9rem;right:.9rem;bottom:.3rem;height:2px;background:var(--p);transform:scaleX(0);transform-origin:left;transition:.25s}
.nav a:hover{color:var(--p)}
.nav a:hover::after,.nav a.active::after{transform:scaleX(1)}
.nav a.active{color:var(--p)}
.hcta{display:flex;align-items:center;gap:.9rem}
.hphone{display:flex;align-items:center;gap:.55rem}
.hphone svg{width:32px;height:32px;color:var(--p)}
.hphone small{display:block;font-size:.68rem;color:var(--gray);text-transform:uppercase;letter-spacing:.05em}
.hphone b{font-weight:700;font-size:.98rem;color:var(--text)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:10px}
.burger span{width:24px;height:2px;background:var(--text);transition:.3s;border-radius:2px}
.burger.open span:first-child{transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:last-child{transform:translateY(-7px) rotate(-45deg)}
@media(max-width:1080px){.nav,.hphone{display:none}.burger{display:flex}}
@media(max-width:480px){.hcta .btn{display:none}}

/* ── DRAWER ── */
.overlay{position:fixed;inset:0;background:rgba(10,32,54,.55);z-index:150;opacity:0;visibility:hidden;transition:.3s}
.overlay.open{opacity:1;visibility:visible}
.drawer{position:fixed;inset:0 0 0 auto;width:min(80vw,310px);background:#fff;z-index:200;transform:translateX(100%);transition:.35s cubic-bezier(.4,0,.2,1);box-shadow:-10px 0 40px rgba(0,0,0,.14);padding:1.4rem;overflow-y:auto}
.drawer.open{transform:translateX(0)}
.drawer__x{margin-left:auto;display:block;background:none;border:0;font-size:1.5rem;cursor:pointer;color:var(--gray);line-height:1}
.drawer a{display:flex;align-items:center;min-height:48px;padding:1rem .4rem;font-weight:600;border-bottom:1px solid var(--border);color:var(--text)}
.drawer a:last-of-type{border:0}
.drawer .btn{margin-top:1.1rem;width:100%}
@supports(padding-bottom:env(safe-area-inset-bottom)){.drawer{padding-bottom:max(1.4rem,env(safe-area-inset-bottom))}}

/* ── REVEAL ── */
[data-reveal]{opacity:0;transform:translateY(30px);transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1)}
[data-reveal].in{opacity:1;transform:none}
[data-reveal-delay="1"]{transition-delay:.1s}
[data-reveal-delay="2"]{transition-delay:.2s}
[data-reveal-delay="3"]{transition-delay:.3s}
[data-stagger]>*{opacity:0;transform:translateY(22px);transition:opacity .6s cubic-bezier(.22,1,.36,1),transform .6s cubic-bezier(.22,1,.36,1)}
[data-stagger].in>*:nth-child(1){opacity:1;transform:none;transition-delay:.05s}
[data-stagger].in>*:nth-child(2){opacity:1;transform:none;transition-delay:.13s}
[data-stagger].in>*:nth-child(3){opacity:1;transform:none;transition-delay:.21s}
[data-stagger].in>*:nth-child(4){opacity:1;transform:none;transition-delay:.29s}
[data-stagger].in>*:nth-child(5){opacity:1;transform:none;transition-delay:.37s}
[data-stagger].in>*:nth-child(6){opacity:1;transform:none;transition-delay:.45s}
@media(prefers-reduced-motion:reduce){[data-reveal],[data-stagger]>*{opacity:1;transform:none;transition:none}}

/* ── BREADCRUMB ── */
.crumb{background:var(--soft);border-bottom:1px solid var(--border)}
.crumb__i{display:flex;align-items:center;flex-wrap:wrap;gap:.5rem;padding:.85rem 0;font-size:.8rem;color:var(--gray)}
.crumb__i a{color:var(--gray);transition:.2s}
.crumb__i a:hover{color:var(--p)}
.crumb__i b{color:var(--text);font-weight:600}
.crumb__sep{color:var(--border)}

/* ── PRODUCT HERO ── */
.phero{position:relative;color:#fff;overflow:hidden;background:linear-gradient(118deg,var(--dark2) 0%,var(--dark) 55%,#1a5c99 100%)}
.phero__grid{position:absolute;inset:0;background-image:linear-gradient(rgba(23,176,196,.07) 1px,transparent 1px),linear-gradient(90deg,rgba(23,176,196,.07) 1px,transparent 1px);background-size:60px 60px;-webkit-mask-image:radial-gradient(ellipse 100% 100% at 50% 50%,#000,transparent 80%);mask-image:radial-gradient(ellipse 100% 100% at 50% 50%,#000,transparent 80%)}
.phero__glow{position:absolute;width:600px;height:600px;border-radius:50%;right:-220px;top:-200px;background:radial-gradient(circle,rgba(27,111,179,.32),transparent 65%)}
.phero__i{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(2rem,5vw,4rem);align-items:center;padding:clamp(3rem,6vw,5rem) 0}
.phero__badge{display:inline-flex;align-items:center;gap:.5rem;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);padding:.4rem 1rem;border-radius:var(--rpill);font-size:.74rem;font-weight:700;letter-spacing:.04em;margin-bottom:1.2rem}
.phero__badge::before{content:"";width:7px;height:7px;border-radius:50%;background:#4ade80;box-shadow:0 0 0 4px rgba(74,222,128,.28)}
.phero h1{font-size:clamp(1.9rem,4.4vw,3.1rem);font-weight:800;line-height:1.1;margin-bottom:1.1rem;color:#fff;letter-spacing:-.02em}
.phero h1 em{color:var(--teal);font-style:normal}
.phero__sub{font-size:clamp(.95rem,1.4vw,1.08rem);color:rgba(255,255,255,.82);line-height:1.75;margin-bottom:1.5rem;max-width:540px}
.phero__chips{display:flex;flex-wrap:wrap;gap:.5rem;margin-bottom:2rem}
.phero__chips span{font-size:.72rem;font-weight:700;padding:.32rem .85rem;border-radius:var(--rpill);background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);color:rgba(255,255,255,.88)}
.phero__actions{display:flex;gap:.8rem;flex-wrap:wrap}
/* Ảnh mẫu hero: hình VUÔNG, to hơn ~30% */
.phero__visual{position:relative;border-radius:var(--r18);aspect-ratio:1;width:100%;max-width:440px;margin-left:auto;background:linear-gradient(150deg,rgba(255,255,255,.08),rgba(255,255,255,.02));border:1px solid rgba(255,255,255,.16);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.1rem;padding:2rem;overflow:hidden}
.phero__visual::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.08) 1px,transparent 0);background-size:22px 22px}
.phero__visual svg{position:relative;width:120px;height:120px;color:rgba(255,255,255,.85)}
.phero__visual b{position:relative;font-size:1.1rem;font-weight:700}
.phero__visual span{position:relative;font-size:.82rem;color:rgba(255,255,255,.65);text-align:center}
@media(max-width:860px){.phero__i{grid-template-columns:1fr;gap:2rem}.phero__visual{order:-1;max-width:360px;margin:0 auto}}

/* ── TRUST BAR (mini stats) ── */
.trust{background:var(--dark);position:relative;overflow:hidden}
.trust::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.13) 1px,transparent 0);background-size:24px 24px;opacity:.5}
.trust__g{position:relative;display:grid;grid-template-columns:repeat(5,1fr);padding:clamp(2rem,4vw,2.8rem) 0;color:#fff}
.trust__it{text-align:center;padding:0 .8rem;position:relative}
.trust__it:not(:last-child)::after{content:"";position:absolute;right:0;top:14%;height:72%;width:1px;background:rgba(255,255,255,.18)}
.trust__it b{font-size:clamp(1.4rem,3vw,2.1rem);font-weight:700;display:block;line-height:1}
.trust__it span{font-size:.78rem;color:rgba(255,255,255,.8)}
@media(max-width:740px){.trust__g{grid-template-columns:repeat(2,1fr);gap:1.8rem 1rem}.trust__it:nth-child(2)::after,.trust__it:nth-child(4)::after{display:none}.trust__it:last-child{grid-column:1/-1}.trust__it:last-child::after{display:none}}

/* ── FEATURE GRID ── */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.4rem}
.feat{display:flex;gap:1rem;align-items:flex-start;padding:1.4rem;border-radius:var(--r14);border:1px solid var(--border);background:#fff;transition:.3s}
.feat:hover{border-color:var(--p);box-shadow:var(--s2);transform:translateY(-3px)}
.feat__ic{flex-shrink:0;width:48px;height:48px;border-radius:var(--r10);background:var(--soft);color:var(--p);display:grid;place-items:center;transition:.2s}
.feat:hover .feat__ic{background:var(--p);color:#fff}
.feat__ic svg{width:23px;height:23px}
.feat h4{font-size:.98rem;font-weight:700;margin-bottom:.3rem}
.feat p{font-size:.85rem;color:var(--gray);line-height:1.6}
@media(max-width:900px){.feat-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.feat-grid{grid-template-columns:1fr;gap:1rem}.feat{padding:1.1rem}}

/* ── SPEC TABLE ── */
.spec-wrap{max-width:840px;margin:0 auto;border:1px solid var(--border);border-radius:var(--r14);overflow:hidden;box-shadow:var(--s1)}
.spec-table{width:100%;border-collapse:collapse;font-size:.92rem}
.spec-table th,.spec-table td{text-align:left;padding:1rem 1.3rem;border-bottom:1px solid var(--border)}
.spec-table tr:last-child th,.spec-table tr:last-child td{border-bottom:0}
.spec-table th{background:var(--soft);color:var(--pd);font-weight:700;width:42%;white-space:nowrap}
.spec-table td{color:var(--text)}
.spec-table tr:hover td{background:#fafcff}
@media(max-width:560px){.spec-table th,.spec-table td{padding:.8rem .9rem;font-size:.86rem}.spec-table th{width:46%}}

/* ── OPTION CHIPS (variants) ── */
.opts{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:1.2rem;max-width:980px;margin:0 auto}
.opt{padding:1.3rem;border:1px solid var(--border);border-radius:var(--r14);background:#fff}
.opt h4{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--gray);margin-bottom:.85rem}
.opt__chips{display:flex;flex-wrap:wrap;gap:.4rem}
.opt__chips span{font-size:.78rem;font-weight:600;background:var(--soft);color:var(--pd);border:1px solid rgba(27,111,179,.14);padding:.32rem .75rem;border-radius:var(--r6)}
.swatch{display:inline-flex;align-items:center;gap:.4rem}
.swatch i{width:14px;height:14px;border-radius:50%;border:1px solid rgba(0,0,0,.12);display:inline-block}

/* ── APPLICATIONS CARDS (reuse style) ── */
.appl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.2rem}
.appl{display:block;padding:1.4rem;border-radius:var(--r14);border:1px solid var(--border);background:#fff;transition:.3s}
.appl:hover{border-color:var(--p);box-shadow:var(--s2);transform:translateY(-3px)}
.appl__ic{width:46px;height:46px;border-radius:var(--r10);background:var(--soft);color:var(--p);display:grid;place-items:center;margin-bottom:.9rem;transition:.2s}
.appl:hover .appl__ic{background:var(--p);color:#fff}
.appl__ic svg{width:22px;height:22px}
.appl h4{font-size:.97rem;font-weight:700;margin-bottom:.3rem}
.appl p{font-size:.84rem;color:var(--gray);line-height:1.55}
@media(max-width:900px){.appl-grid{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.appl-grid{grid-template-columns:1fr}}

/* ── GALLERY ── */
.gallery{display:grid;grid-template-columns:repeat(3,1fr);gap:1.1rem}
.gphoto{aspect-ratio:1;border-radius:var(--r14);position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.5rem;color:rgba(255,255,255,.92);border:1px solid var(--border)}
.gphoto::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.1) 1px,transparent 0);background-size:20px 20px}
.gphoto svg{position:relative;width:40px;height:40px;opacity:.9}
.gphoto span{position:relative;font-size:.78rem;font-weight:600}
.gp1{background:linear-gradient(140deg,var(--p),var(--pdd))}
.gp2{background:linear-gradient(140deg,#1f6bb0,var(--dark))}
.gp3{background:linear-gradient(140deg,var(--teal-d),var(--pd))}
.gp4{background:linear-gradient(140deg,var(--pdd),#0a2036)}
.gp5{background:linear-gradient(140deg,var(--teal),var(--pd))}
.gp6{background:linear-gradient(140deg,#2a7dc4,var(--dark2))}
@media(max-width:760px){.gallery{grid-template-columns:1fr 1fr}}
@media(max-width:480px){.gallery{grid-template-columns:1fr 1fr;gap:.7rem}.gphoto svg{width:32px;height:32px}}

/* ── PROCESS MINI STRIP ── */
.pmini{display:grid;grid-template-columns:repeat(4,1fr);gap:1rem;position:relative}
.pmini::before{content:"";position:absolute;top:30px;left:10%;right:10%;height:2px;background:repeating-linear-gradient(90deg,rgba(255,255,255,.28) 0 8px,transparent 8px 16px)}
.pstep{text-align:center;position:relative;z-index:1}
.pstep__n{width:60px;height:60px;margin:0 auto .9rem;border-radius:50%;background:var(--dark);border:2px solid var(--teal);color:#fff;display:grid;place-items:center;font-size:1.2rem;font-weight:700}
.pstep h4{color:#fff;font-size:.95rem;font-weight:700;margin-bottom:.35rem}
.pstep p{font-size:.8rem;color:rgba(255,255,255,.68)}
@media(max-width:760px){.pmini{grid-template-columns:1fr 1fr;gap:1.8rem}.pmini::before{display:none}}
@media(max-width:380px){.pmini{grid-template-columns:1fr}}

/* ── CASE STUDY ── */
.case{max-width:900px;margin:0 auto;border-radius:var(--r18);background:linear-gradient(150deg,var(--p),var(--dark2));color:#fff;padding:clamp(1.8rem,4vw,2.8rem);position:relative;overflow:hidden}
.case::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.08) 1px,transparent 0);background-size:22px 22px}
.case__flag{position:absolute;top:1.4rem;right:1.6rem;font-size:2.6rem;line-height:1;z-index:1}
.case__tag{position:relative;display:inline-block;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.24);font-size:.72rem;font-weight:700;padding:.3rem .8rem;border-radius:var(--rpill);margin-bottom:1rem}
.case h3{position:relative;color:#fff;font-size:clamp(1.2rem,2.4vw,1.6rem);font-weight:700;margin-bottom:.8rem;max-width:80%}
.case p{position:relative;color:rgba(255,255,255,.88);line-height:1.7;font-size:.95rem}

/* ── PARTNERS LOGO STRIP ── */
.plogos{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:clamp(1.4rem,4.5vw,3.2rem)}
.plogos span{font-weight:700;font-size:1.35rem;color:#b4bec9;letter-spacing:.02em;transition:.3s;filter:grayscale(1)}
.plogos span:hover{color:var(--p);filter:none;transform:scale(1.06)}

/* ── FAQ ── */
.faq{max-width:820px;margin:0 auto;display:grid;gap:.8rem}
.faq__it{border:1px solid var(--border);border-radius:var(--r14);background:#fff;overflow:hidden;transition:.25s}
.faq__it[open]{border-color:var(--p);box-shadow:var(--s1)}
.faq__q{list-style:none;cursor:pointer;padding:1.1rem 1.3rem;font-weight:600;font-size:.96rem;display:flex;align-items:center;justify-content:space-between;gap:1rem}
.faq__q::-webkit-details-marker{display:none}
.faq__q::after{content:"+";font-size:1.4rem;font-weight:400;color:var(--p);transition:.25s;flex-shrink:0}
.faq__it[open] .faq__q::after{transform:rotate(45deg)}
.faq__a{padding:0 1.3rem 1.2rem;color:var(--gray);font-size:.9rem;line-height:1.7}
@media(max-width:560px){.faq__q{padding:1rem;font-size:.9rem}.faq__a{padding:0 1rem 1rem}}

/* ── DOWNLOAD CARD ── */
.dl{display:grid;grid-template-columns:1fr 1fr;gap:clamp(1.5rem,4vw,3rem);align-items:center;max-width:1000px;margin:0 auto}
.dl__card{border-radius:var(--r18);background:linear-gradient(150deg,var(--dark),var(--dark2));padding:2.4rem;color:#fff;display:flex;flex-direction:column;align-items:center;text-align:center;gap:1rem;box-shadow:var(--s3);position:relative;overflow:hidden;min-height:230px;justify-content:center}
.dl__card::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.07) 1px,transparent 0);background-size:22px 22px}
.dl__card>*{position:relative;z-index:1}
.dl__card svg{width:54px;height:54px;color:rgba(255,255,255,.62)}
.dl__card b{font-size:1.05rem;font-weight:700}
.dl__card span{font-size:.82rem;color:rgba(255,255,255,.6)}
@media(max-width:760px){.dl{grid-template-columns:1fr;text-align:center}.dl__txt{order:-1}}

/* ── CTA QUOTATION + FORM ── */
.cta-q{background:var(--dark);color:#fff;position:relative;overflow:hidden}
.cta-q::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.1) 1px,transparent 0);background-size:24px 24px}
.cta-q__i{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:clamp(2rem,5vw,4rem);align-items:center}
.cta-q__txt h2{color:#fff;font-size:clamp(1.6rem,3.2vw,2.4rem);font-weight:700;margin-bottom:1rem}
.cta-q__txt p{color:rgba(255,255,255,.88);margin-bottom:1.8rem;line-height:1.7}
.cta-q__actions{display:flex;gap:.8rem;flex-wrap:wrap}
.sales-list{margin-top:2rem;display:grid;gap:.5rem}
.sales-item{display:flex;align-items:center;gap:.6rem;font-size:.85rem;color:rgba(255,255,255,.8)}
.sales-item svg{flex-shrink:0;color:var(--teal)}
.cta-q__form{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-radius:var(--r18);padding:2rem}
.cta-q__form h3{color:#fff;font-size:1.15rem;font-weight:700;margin-bottom:1.3rem}
.fgroup{margin-bottom:1rem}
.fgroup label{display:block;font-size:.8rem;font-weight:600;color:rgba(255,255,255,.8);margin-bottom:.4rem}
.fgroup input,.fgroup select,.fgroup textarea{width:100%;padding:.72rem 1rem;border-radius:var(--r10);border:1px solid rgba(255,255,255,.25);background:rgba(255,255,255,.12);color:#fff;font-family:'Inter',sans-serif;font-size:.9rem;outline:none;transition:.2s}
.fgroup input::placeholder,.fgroup textarea::placeholder{color:rgba(255,255,255,.45)}
.fgroup input:focus,.fgroup select:focus,.fgroup textarea:focus{border-color:var(--teal);background:rgba(255,255,255,.18)}
.fgroup select option{color:var(--text);background:#fff}
.fgroup textarea{height:120px;resize:vertical}
.fgroup .ferr{display:none;font-size:.76rem;color:#fca5a5;margin-top:.3rem;font-weight:500}
.fgroup.has-error .ferr{display:block}
.fgroup.has-error input,.fgroup.has-error textarea{border-color:#f87171}
@media(max-width:840px){.cta-q__i{grid-template-columns:1fr}}
@media(max-width:480px){.cta-q__form{padding:1.4rem 1.1rem}}
@media(max-width:400px){.cta-q__txt h2{font-size:1.5rem}.cta-q__actions{flex-direction:column}.cta-q__actions .btn{width:100%}}
@media(max-width:768px){.fgroup input,.fgroup select,.fgroup textarea{font-size:16px}}

/* ── 3D VIEWER WINDOW ── */
.viewer__i{max-width:820px;margin:0 auto}
.viewer__stage{position:relative;border-radius:var(--r18);background:radial-gradient(ellipse at 50% 40%,#fff,var(--soft) 75%);border:1px solid var(--border);box-shadow:var(--s2);overflow:hidden;aspect-ratio:16/9}
model-viewer{position:absolute;inset:0;width:100%;height:100%;--poster-color:transparent;background:transparent}
.viewer__hint{position:absolute;bottom:.9rem;left:50%;transform:translateX(-50%);font-size:.72rem;color:var(--gray);background:rgba(255,255,255,.85);border:1px solid var(--border);padding:.3rem .8rem;border-radius:var(--rpill);display:flex;align-items:center;gap:.4rem;pointer-events:none;white-space:nowrap}
.viewer__hint svg{width:13px;height:13px;color:var(--p)}
.viewer__fallback{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.9rem;text-align:center;padding:2rem;color:var(--gray)}
.viewer__fallback svg{width:74px;height:74px;color:var(--p);opacity:.35}
.viewer__fallback b{color:var(--text);font-size:1rem}
.viewer__fallback span{font-size:.84rem;max-width:280px}
.viewer__panel{display:flex;flex-direction:column;justify-content:center;gap:1.3rem}
.viewer__panel h3{font-size:1.25rem;font-weight:700}
.viewer__row b{display:block;font-size:.74rem;text-transform:uppercase;letter-spacing:.08em;color:var(--gray);margin-bottom:.6rem}
.vchips{display:flex;flex-wrap:wrap;gap:.5rem}
.vchip{cursor:pointer;font-size:.8rem;font-weight:600;padding:.45rem .85rem;border-radius:var(--rpill);border:1.5px solid var(--border);background:#fff;color:var(--text);transition:.2s;display:inline-flex;align-items:center;gap:.45rem}
.vchip:hover{border-color:var(--p)}
.vchip.active{border-color:var(--p);background:var(--soft);color:var(--pd)}
.vchip i{width:15px;height:15px;border-radius:50%;border:1px solid rgba(0,0,0,.15);display:inline-block}
.viewer__spec{display:grid;gap:.5rem;border-top:1px solid var(--border);padding-top:1.2rem}
.viewer__spec div{display:flex;justify-content:space-between;font-size:.86rem}
.viewer__spec span{color:var(--gray)}
.viewer__spec b{font-weight:600;color:var(--text)}

/* ── ARTICLE / PRODUCT PROSE (blog-style, liền mạch) ── */
.article{max-width:760px;margin:0 auto}
.article>*+*{margin-top:1.05rem}
.article h2{font-size:clamp(1.3rem,2.6vw,1.75rem);font-weight:700;margin-top:2.4rem;padding-top:.2rem;scroll-margin-top:90px}
.article h2:first-child{margin-top:0}
.article h2 .article__eye{display:block;font-size:.72rem;font-weight:700;text-transform:uppercase;letter-spacing:.12em;color:var(--p);margin-bottom:.4rem}
.article p{color:var(--slate);line-height:1.85;font-size:1rem}
.article a{color:var(--p);font-weight:600}
.article a:hover{text-decoration:underline}
.article strong{color:var(--text);font-weight:700}
.article .lead{font-size:1.08rem;color:var(--text)}
/* checklist liền mạch trong bài */
.article ul.checks{display:grid;gap:.6rem;margin-top:1rem}
.article ul.checks li{position:relative;padding-left:1.9rem;color:var(--slate);line-height:1.65;font-size:.95rem}
.article ul.checks li::before{content:"";position:absolute;left:0;top:2px;width:1.3rem;height:1.3rem;border-radius:50%;background:var(--soft);background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231B6FB3' stroke-width='3'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");background-size:.8rem;background-position:center;background-repeat:no-repeat}
.article ul.checks li b{color:var(--text)}
/* hình minh họa trong bài */
.article figure{margin:1.8rem 0}
.article .figph{aspect-ratio:1;max-width:420px;margin:0 auto;border-radius:var(--r14);position:relative;overflow:hidden;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:.6rem;color:rgba(255,255,255,.95);background:linear-gradient(135deg,var(--p),var(--dark2))}
.article .figph::before{content:"";position:absolute;inset:0;background-image:radial-gradient(circle at 1px 1px,rgba(255,255,255,.1) 1px,transparent 0);background-size:22px 22px}
.article .figph svg{position:relative;width:54px;height:54px;opacity:.9}
.article .figph span{position:relative;font-size:.85rem;font-weight:600}
.article figcaption{font-size:.82rem;color:var(--gray);text-align:center;margin-top:.7rem;font-style:italic}
/* bảng spec trong bài */
.article .spec-wrap{margin-top:1rem}
/* FAQ dạng văn xuôi */
.article .qa{margin-top:1.2rem}
.article .qa h3{font-size:1.02rem;font-weight:700;color:var(--text);margin-bottom:.35rem}
.article .qa p{margin-bottom:1rem}
.article .qa p:last-child{margin-bottom:0}
@media(max-width:560px){.article p{font-size:.96rem}}

/* ── STICKY MOBILE CTA ── */
.scta{position:fixed;left:0;right:0;bottom:0;z-index:95;display:none;gap:.6rem;padding:.7rem .9rem;background:rgba(255,255,255,.96);-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);border-top:1px solid var(--border);box-shadow:0 -6px 20px rgba(15,42,69,.1)}
.scta .btn{flex:1;padding:.75rem 1rem;font-size:.88rem}
@supports(padding-bottom:env(safe-area-inset-bottom)){.scta{padding-bottom:max(.7rem,env(safe-area-inset-bottom))}}
@media(max-width:760px){.scta{display:flex}body{padding-bottom:76px}}

/* ── FOOTER ── */
.footer{background:var(--dark2);color:rgba(255,255,255,.7);padding:clamp(3rem,6vw,4.5rem) 0 0}
.footer__g{display:grid;grid-template-columns:1.2fr 1fr 1.5fr;gap:2.5rem;padding-bottom:3rem}
.footer__brand .logo{margin-bottom:1rem}
.footer__brand .logo__t b{color:#fff}
.footer__brand .logo__t small{color:rgba(255,255,255,.5)}
.footer__brand p{font-size:.88rem;margin:1.1rem 0;line-height:1.7}
.footer__brand .fcontact{margin-top:1.1rem}
.footer__brand .fsocial{margin-top:1.2rem}
.fsocial{display:flex;gap:.5rem}
.fsocial a{width:34px;height:34px;border-radius:var(--r6);background:rgba(255,255,255,.08);display:grid;place-items:center;transition:.25s}
.fsocial a:hover{background:var(--p)}
.fsocial svg{width:15px;height:15px}
.footer h5{color:#fff;font-size:.98rem;font-weight:700;margin-bottom:1.2rem}
.footer ul li{margin-bottom:.65rem}
.footer ul a{font-size:.87rem;transition:.2s}
.footer ul a:hover{color:var(--teal);padding-left:4px}
.fcontact li{display:flex;gap:.65rem;font-size:.87rem;margin-bottom:.9rem;align-items:flex-start}
.fcontact svg{width:16px;height:16px;color:var(--teal);flex-shrink:0;margin-top:3px}
.footer__btm{border-top:1px solid rgba(255,255,255,.1);padding:1.4rem 0;display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;font-size:.82rem}
@media(max-width:860px){.footer__g{grid-template-columns:1fr 1fr;gap:2rem}}
@media(max-width:500px){.footer__g{grid-template-columns:1fr}.footer__btm{flex-direction:column;text-align:center;gap:.4rem}}

/* ── FAB & BACK-TO-TOP ── */
.fab{position:fixed;right:16px;bottom:80px;z-index:90;display:flex;flex-direction:column;gap:.8rem;opacity:0;visibility:hidden;transform:translateX(24px);transition:.4s}
.fab.show{opacity:1;visibility:visible;transform:none}
.fab a,.fab button{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;color:#fff;box-shadow:0 10px 24px rgba(15,42,69,.3);transition:transform .25s;position:relative}
.fab button{border:0;cursor:pointer;padding:0;font:inherit}
.fab a:hover,.fab button:hover{transform:scale(1.1)}
.fab a svg,.fab button svg{position:relative;z-index:2;width:20px;height:20px}
.fab__contact{background:#16a34a}
.fab__interest{background:var(--p)}
.fab a::before,.fab button::before{content:"";position:absolute;inset:0;border-radius:50%;background:inherit;animation:pRing 2.2s ease-out infinite}
.fab__interest::before{animation-delay:1.1s}
@keyframes pRing{0%{opacity:.55;transform:scale(1)}100%{opacity:0;transform:scale(1.9)}}
.fab__tip{position:absolute;right:58px;top:50%;transform:translateY(-50%) translateX(8px);white-space:nowrap;background:var(--dark);color:#fff;font-size:.75rem;font-weight:600;padding:.4rem .75rem;border-radius:var(--r6);opacity:0;pointer-events:none;transition:.25s;box-shadow:var(--s2)}
.fab a:hover .fab__tip,.fab button:hover .fab__tip{opacity:1;transform:translateY(-50%) translateX(0)}
.totop{position:fixed;right:16px;bottom:20px;width:46px;height:46px;border-radius:50%;background:var(--dark);color:#fff;border:0;display:grid;place-items:center;cursor:pointer;box-shadow:var(--s2);opacity:0;visibility:hidden;transform:translateY(14px);transition:.3s;z-index:90}
.totop.show{opacity:1;visibility:visible;transform:none}
.totop svg{width:18px;height:18px}
@media(prefers-reduced-motion:reduce){.fab a::before,.fab button::before{animation:none;opacity:0}}
/* FAB sits above sticky cta on mobile */
@media(max-width:760px){.fab{bottom:140px}.totop{bottom:84px}}
@supports(padding-bottom:env(safe-area-inset-bottom)){
  .fab{bottom:max(80px,calc(64px + env(safe-area-inset-bottom)))}
  .totop{bottom:max(20px,calc(10px + env(safe-area-inset-bottom)))}
  @media(max-width:760px){
    .fab{bottom:max(140px,calc(120px + env(safe-area-inset-bottom)))}
    .totop{bottom:max(84px,calc(70px + env(safe-area-inset-bottom)))}
  }
}

/* ── FOOTER STAFF CONTACTS ── */
.fstaff{margin-top:1.1rem;display:grid;gap:.7rem}
.fstaff__item{border-top:1px solid rgba(255,255,255,.07);padding-top:.65rem}
.fstaff__item:first-child{border-top:0;padding-top:0}
.fstaff__name{font-size:.8rem;font-weight:700;color:#fff;margin-bottom:.18rem}
.fstaff__contact{display:flex;flex-wrap:wrap;gap:.2rem .6rem}
.fstaff__contact a{font-size:.78rem;color:rgba(255,255,255,.7);transition:.2s}
.fstaff__contact a:hover{color:var(--teal)}

/* ── CONTACT MODAL ── */
.cmodal{position:fixed;inset:0;z-index:300;display:grid;place-items:center;padding:1rem;opacity:0;visibility:hidden;transition:.3s}
.cmodal.open{opacity:1;visibility:visible}
.cmodal__ov{position:absolute;inset:0;background:rgba(10,32,54,.6);-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}
.cmodal__box{position:relative;z-index:1;background:#fff;border-radius:var(--r18);width:100%;max-width:480px;max-height:88vh;overflow-y:auto;box-shadow:var(--s3);transform:translateY(20px);transition:.35s cubic-bezier(.22,1,.36,1)}
.cmodal.open .cmodal__box{transform:none}
.cmodal__hd{display:flex;justify-content:space-between;align-items:center;padding:1.3rem 1.6rem;border-bottom:1px solid var(--border);position:sticky;top:0;background:#fff;z-index:1}
.cmodal__hd span{font-weight:700;font-size:1.05rem;color:var(--text)}
.cmodal__x{background:none;border:0;font-size:1.5rem;line-height:1;cursor:pointer;color:var(--gray);width:34px;height:34px;display:grid;place-items:center;border-radius:50%;transition:.2s}
.cmodal__x:hover{background:var(--light)}
.cmodal__note{padding:.7rem 1.6rem;font-size:.82rem;color:var(--gray);background:var(--soft);border-bottom:1px solid var(--border)}
.cmodal__list{padding:1.1rem 1.4rem;display:grid;gap:.85rem}
.cmodal__person{border:1px solid var(--border);border-radius:var(--r14);padding:.95rem 1.1rem;transition:.2s}
.cmodal__person:hover{border-color:rgba(27,111,179,.28)}
.cmodal__pname{font-weight:700;font-size:.95rem;color:var(--text);margin-bottom:.55rem;display:flex;align-items:center;gap:.45rem}
.cmodal__pname::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--teal);flex-shrink:0}
.cmodal__row{display:flex;align-items:center;gap:.4rem;margin-bottom:.32rem;flex-wrap:wrap}
.cmodal__row:last-child{margin-bottom:0}
.cmodal__row>svg{width:13px;height:13px;color:var(--p);flex-shrink:0}
.cmodal__row a{font-size:.88rem;color:var(--text);font-weight:600;transition:.2s}
.cmodal__row a:hover{color:var(--p)}
.cmodal__copy{background:none;border:1px solid var(--border);font-size:.7rem;font-weight:600;color:var(--gray);padding:.18rem .5rem;border-radius:var(--r6);cursor:pointer;transition:.2s;white-space:nowrap}
.cmodal__copy:hover{border-color:var(--p);color:var(--p);background:var(--soft)}
.cmodal__zalo{display:inline-flex;align-items:center;gap:.25rem;background:none;border:1px solid rgba(23,176,196,.35);font-size:.7rem;font-weight:700;color:var(--teal);padding:.18rem .5rem;border-radius:var(--r6);text-decoration:none;cursor:pointer;transition:.2s;white-space:nowrap}
.cmodal__zalo:hover{background:rgba(23,176,196,.09)}