/* Thiện Phát PU – nhận diện đen + vàng theo logo (đồng bộ Zalo Mini App) */
:root{
  --brand:#1c1a17; --brand-2:#2a2620; --gold:#c9a24a; --gold-ink:#9a7426; --gold-soft:#f7f1e3;
  --ink:#1f1a16; --muted:#6f665e; --line:#e8e1d8; --bg:#fff; --soft:#f7f5f2;
  --r:14px; --shadow:0 8px 28px rgba(40,25,5,.10);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}
h2{font-size:clamp(24px,3.2vw,34px)}
h3{font-size:18px}
button{font:inherit;cursor:pointer}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
.wrap{max-width:1200px;margin:0 auto;padding:0 16px}
.narrow{max-width:860px}
.kicker{display:inline-block;color:var(--gold-ink);font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin-bottom:6px}
.todo{color:#a3541a;background:#fff4e5;border-left:3px solid #f0a14a;padding:6px 10px;border-radius:6px;font-size:14px}

/* top bar */
.tbar{background:var(--brand);color:#d9cfbd;font-size:13px}
.tbar__in{display:flex;gap:22px;justify-content:flex-end;align-items:center;min-height:36px}
.tbar__in>*{display:inline-flex;gap:6px;align-items:center;text-decoration:none}
.tbar b{color:var(--gold)}
.tbar__addr{margin-right:auto}

/* header */
.top{position:sticky;top:0;z-index:50;background:#fff;border-bottom:1px solid var(--line);box-shadow:0 2px 10px rgba(0,0,0,.04)}
.top__in{display:flex;align-items:center;gap:20px;min-height:72px}
.brand{display:flex;gap:10px;align-items:center;text-decoration:none;margin-right:auto}
.brand span{display:flex;flex-direction:column;line-height:1.2}
.brand b{font-size:18px;letter-spacing:.02em}
.brand small{color:var(--muted);font-size:12px}
.nav{display:flex;align-items:center;gap:2px}
.nav>a,.dd>a{display:inline-flex;align-items:center;gap:2px;padding:10px 12px;text-decoration:none;font-weight:600;font-size:15px;border-radius:8px}
.nav a:hover,.nav a.on{color:var(--gold-ink)}
.nav a.on{box-shadow:inset 0 -2px 0 var(--gold)}
.dd{position:relative}
.dd__m{position:absolute;top:100%;left:0;min-width:220px;background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:var(--shadow);padding:6px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.15s}
.dd:hover .dd__m,.dd:focus-within .dd__m{opacity:1;visibility:visible;transform:none}
.dd__m a{display:block;padding:9px 12px;border-radius:6px;text-decoration:none;font-size:15px}
.dd__m a:hover{background:var(--gold-soft)}
.nav__quote{margin-left:8px;background:var(--gold);color:var(--brand);border:0;font-weight:700;padding:10px 18px;border-radius:999px}
.nav__quote:hover{background:#d8b45f}
.burger{display:none;background:none;border:0;width:44px;height:44px;padding:10px;flex-direction:column;justify-content:space-between}
.burger span{display:block;height:2px;background:var(--ink);border-radius:2px}

.crumbs{background:var(--soft);font-size:14px;color:var(--muted)}
.crumbs .wrap{padding-top:10px;padding-bottom:10px}
.crumbs a{text-decoration:none;color:var(--muted)}
.crumbs a:hover{color:var(--gold-ink)}
.crumbs span{color:var(--ink)}

/* buttons */
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:20px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:12px 24px;border-radius:999px;font-weight:700;text-decoration:none;border:2px solid transparent;font-size:15px;transition:.15s}
.btn--gold{background:var(--gold);color:var(--brand)}
.btn--gold:hover{background:#d8b45f}
.btn--dark{background:var(--brand);color:#fff}
.btn--dark:hover{background:#000}
.btn--ghost{border-color:rgba(255,255,255,.7);color:#fff;background:transparent}
.btn--ghost:hover{background:rgba(255,255,255,.12)}
.btn--full{width:100%}

/* hero slider */
.hero{position:relative;height:min(78vh,620px);min-height:440px;background:#14120f;overflow:hidden}
.slide{position:absolute;inset:0;background:#14120f center/cover no-repeat;opacity:0;transition:opacity .8s;display:flex;align-items:center;color:#fff}
.slide.is-on{opacity:1;z-index:1}
.slide::before,.phead::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(14,12,9,.88) 0%,rgba(14,12,9,.55) 55%,rgba(14,12,9,.15))}
.slide__in,.phead .wrap{position:relative}
.slide__in{width:100%}
.slide__t{font-size:clamp(32px,5.5vw,58px);max-width:720px;margin-bottom:.3em}
.slide p{font-size:clamp(16px,2vw,20px);max-width:560px;color:#e9e2d4}
.slide .kicker{color:var(--gold)}
.dots{position:absolute;z-index:2;bottom:22px;left:50%;transform:translateX(-50%);display:flex;gap:8px}
.dots button{width:10px;height:10px;border-radius:50%;border:0;background:rgba(255,255,255,.45);padding:0}
.dots button.is-on{background:var(--gold);width:28px;border-radius:6px}

/* page head */
.phead{position:relative;background:#14120f center/cover no-repeat;color:#fff;padding:64px 0 56px}
.phead .kicker{color:var(--gold)}
.phead h1{font-size:clamp(28px,4.5vw,44px)}
.phead p{color:#e2dacb;max-width:640px;margin:0}

/* sections */
.sec{padding:72px 0}
.sec--soft{background:var(--soft)}
.sec--dark{background:var(--brand);color:#fff}
.sec--dark .kicker{color:var(--gold)}
.sec__h{margin-bottom:28px}
.sec__h--row{display:flex;justify-content:space-between;align-items:flex-end;gap:16px}
.more{color:var(--gold-ink);font-weight:700;text-decoration:none;white-space:nowrap}
.lead{color:var(--muted);margin-top:-12px}
.split{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.split--rev .prose{order:2}
.split__media{position:relative;border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);aspect-ratio:4/3;background:var(--soft)}
.split__media img{width:100%;height:100%;object-fit:cover}
.badge{position:absolute;left:16px;bottom:16px;background:rgba(20,18,15,.85);color:#fff;padding:10px 16px;border-radius:10px;font-weight:600;line-height:1.3}
.badge small{color:var(--gold);font-weight:400}
.prose p{color:#3d3630}
.ticks{list-style:none;padding:0;margin:16px 0}
.ticks li{padding-left:30px;position:relative;margin:8px 0}
.ticks li::before{content:"✓";position:absolute;left:0;top:0;width:22px;height:22px;border-radius:50%;background:var(--gold-soft);color:var(--gold-ink);font-weight:800;font-size:13px;display:grid;place-items:center}

/* tabs */
.tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.tab{border:1px solid var(--line);background:#fff;padding:10px 20px;border-radius:999px;font-weight:600}
.tab.is-on{background:var(--brand);color:#fff;border-color:var(--brand)}
.pane{display:none;grid-template-columns:1fr 2fr;gap:32px;align-items:center}
.pane.is-on{display:grid}
.pane__imgs{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.pane__imgs img{aspect-ratio:3/4;object-fit:cover;border-radius:12px;width:100%}
.pane__imgs img:only-child{grid-column:1/-1;aspect-ratio:16/9}

/* why */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.why__i{background:var(--brand-2);border:1px solid #3a342b;border-radius:var(--r);padding:24px}
.why__i span{color:var(--gold);font-weight:800;font-size:28px}
.why__i p{color:#cfc5b4;margin:0;font-size:15px}

.mosaic{display:grid;grid-template-columns:2fr 1fr;grid-template-rows:1fr 1fr;gap:12px;height:420px}
.mosaic img{width:100%;height:100%;object-fit:cover;border-radius:12px}
.mosaic img:first-child{grid-row:1/3}

/* projects */
.projs{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.proj{position:relative;margin:0;border-radius:var(--r);overflow:hidden;aspect-ratio:4/3}
.proj img{width:100%;height:100%;object-fit:cover;transition:transform .4s}
.proj:hover img{transform:scale(1.05)}
.proj figcaption{position:absolute;inset:auto 0 0;padding:32px 16px 14px;color:#fff;background:linear-gradient(transparent,rgba(0,0,0,.75));display:flex;flex-direction:column}
.proj figcaption span{font-size:14px;color:#e2dacb}

/* news */
.news{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.news__i{border:1px solid var(--line);border-radius:var(--r);padding:20px}
.news__i>span{font-size:12px;font-weight:700;color:var(--gold-ink);text-transform:uppercase}

/* faq */
.faq__i{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:10px;padding:0 18px}
.faq__i summary{cursor:pointer;font-weight:600;padding:16px 0;list-style:none;position:relative;padding-right:28px}
.faq__i summary::after{content:"+";position:absolute;right:0;top:12px;font-size:22px;color:var(--gold-ink)}
.faq__i[open] summary::after{content:"–"}
.faq__i p{margin:0 0 16px;color:#3d3630}

/* products placeholder */
.chips{display:flex;gap:8px;flex-wrap:wrap;padding-top:20px;padding-bottom:4px}
.chip{border:1px solid var(--line);border-radius:999px;padding:8px 16px;text-decoration:none;font-weight:600;font-size:14px;background:#fff}
.chip:hover{border-color:var(--gold);color:var(--gold-ink)}
.pgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:16px}
.pcard{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.pcard img{aspect-ratio:1;object-fit:cover;width:100%}
.pcard__b{padding:12px}
.pcard__b small{color:var(--muted)}
.pcard__b h3{font-size:15px;margin:2px 0 6px}
.pcard__price{color:var(--gold-ink);font-weight:700}

/* steps & facts */
.steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,1fr);gap:16px;counter-reset:s}
.steps li{counter-increment:s;background:var(--soft);border-radius:var(--r);padding:24px;display:flex;flex-direction:column;gap:4px}
.steps li::before{content:counter(s);width:40px;height:40px;border-radius:50%;background:var(--gold);color:var(--brand);font-weight:800;display:grid;place-items:center;margin-bottom:8px}
.steps span{color:var(--muted);font-size:15px}
.note{margin-top:24px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.facts b{display:block;font-size:30px;color:var(--gold)}
.facts span{color:#cfc5b4}
.foamph{display:grid;place-items:center;text-align:center;background:repeating-linear-gradient(45deg,#efe9df 0 14px,#f7f3ec 14px 28px);color:var(--muted);font-weight:600}

/* contact & form */
.contact{display:grid;grid-template-columns:1fr 1fr;gap:32px;align-items:start}
.contact__info{display:grid;gap:12px}
.cbox{display:flex;gap:14px;align-items:center;border:1px solid var(--line);border-radius:12px;padding:14px 16px;text-decoration:none}
.cbox svg{color:var(--gold-ink);flex:none}
.cbox small{display:block;color:var(--muted)}
a.cbox:hover{border-color:var(--gold)}
.map{width:100%;height:280px;border:0;border-radius:12px}
.quote{display:grid;gap:12px}
.quote--card{background:var(--soft);border-radius:var(--r);padding:28px}
.quote__sub{margin:-6px 0 4px;color:var(--muted);font-size:14px}
.quote label{display:grid;gap:4px;font-weight:600;font-size:14px}
.quote input,.quote select,.quote textarea{font:inherit;font-weight:400;padding:11px 12px;border:1px solid #d9d0c4;border-radius:10px;background:#fff;width:100%}
.quote input:focus,.quote select:focus,.quote textarea:focus{outline:2px solid var(--gold);border-color:var(--gold)}
.quote .err{border-color:#c0392b}
.row2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.qmsg{margin:0;font-size:14px;color:var(--gold-ink);font-weight:600;min-height:1em}
.qdlg{border:0;border-radius:16px;padding:28px;width:min(520px,calc(100vw - 32px));max-height:calc(100vh - 32px);box-shadow:0 20px 60px rgba(0,0,0,.35)}
.qdlg::backdrop{background:rgba(10,8,5,.6)}
.qdlg__x{position:absolute;right:12px;top:8px;background:none;border:0;font-size:30px;line-height:1;color:var(--muted)}

/* CTA */
.cta{background:linear-gradient(120deg,#2a2218,#14120f);color:#fff;padding:56px 0}
.cta__in{display:flex;justify-content:space-between;align-items:center;gap:24px}
.cta h2{font-size:clamp(22px,3vw,30px)}
.cta p{color:#d6ccba;margin:0}
.cta .btns{margin-top:0;flex:none}

/* footer */
.foot{background:#100e0b;color:#bfb4a2;font-size:15px}
.foot__grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:32px;padding-top:56px;padding-bottom:40px}
.foot h4{color:#fff;margin:0 0 12px;font-size:16px}
.foot p{margin:6px 0;display:flex;gap:8px;align-items:flex-start}
.foot p svg{flex:none;margin-top:3px;color:var(--gold)}
.foot a{text-decoration:none}
.foot a:hover{color:var(--gold)}
.foot b{color:#fff}
.foot__co img{margin-bottom:10px}
.foot__qr{background:#fff;padding:6px;border-radius:8px}
.foot__copy{border-top:1px solid #2a251e;padding:16px 0;font-size:13px;color:#8a7f6e}

/* floating */
.fab{position:fixed;right:18px;bottom:24px;z-index:60;display:flex;flex-direction:column;gap:12px}
.fab__i{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;color:#fff;text-decoration:none;box-shadow:0 6px 18px rgba(0,0,0,.25)}
.fab__zalo{background:#0068ff;font-size:13px}
.fab__call{background:#e0262b;animation:ring 1.6s infinite}
@keyframes ring{0%{box-shadow:0 0 0 0 rgba(224,38,43,.5)}70%{box-shadow:0 0 0 14px rgba(224,38,43,0)}100%{box-shadow:0 0 0 0 rgba(224,38,43,0)}}
.mbar{display:none}

/* responsive */
@media (max-width:1024px){
  .why,.steps,.facts{grid-template-columns:repeat(2,1fr)}
  .pgrid{grid-template-columns:repeat(3,1fr)}
  .foot__grid{grid-template-columns:1fr 1fr}
}
@media (max-width:900px){
  .tbar__in>span{display:none}
  .burger{display:flex}
  .nav{position:fixed;inset:108px 0 auto 0;background:#fff;flex-direction:column;align-items:stretch;padding:8px 16px 20px;border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none;max-height:calc(100vh - 108px);overflow:auto}
  .nav.open{display:flex}
  .nav>a,.dd>a{padding:12px 4px;border-bottom:1px solid var(--line);border-radius:0}
  .nav a.on{box-shadow:none}
  .dd__m{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;border:0;padding:0 0 0 12px}
  .nav__quote{margin:12px 0 0}
  .split,.contact,.pane.is-on{grid-template-columns:1fr;gap:28px}
  .split--rev .prose{order:0}
  .projs,.news{grid-template-columns:1fr 1fr}
  .cta__in{flex-direction:column;align-items:flex-start}
  .mosaic{height:320px}
}
@media (max-width:600px){
  body{font-size:15px}
  .sec{padding:48px 0}
  .tbar__in{justify-content:center}
  .top__in{min-height:64px}
  .nav{inset:100px 0 auto 0;max-height:calc(100vh - 100px)}
  .brand img{width:40px;height:auto}
  .projs,.news,.why,.steps,.row2{grid-template-columns:1fr}
  .pgrid{grid-template-columns:1fr 1fr}
  .facts{grid-template-columns:1fr 1fr}
  .foot__grid{grid-template-columns:1fr}
  .sec__h--row{flex-direction:column;align-items:flex-start}
  .hero{min-height:480px}
  .fab{display:none}
  .mbar{display:grid;grid-template-columns:repeat(3,1fr);position:fixed;left:0;right:0;bottom:0;z-index:60;background:var(--brand);border-top:2px solid var(--gold)}
  .mbar>*{display:flex;flex-direction:column;align-items:center;gap:2px;padding:8px 0 10px;color:#fff;text-decoration:none;font-size:12px;background:none;border:0}
  .mbar>:first-child{color:var(--gold)}
  .foot{padding-bottom:64px}
}
@media (max-width:900px){.dd>a{display:flex}}