/* ═══════════════════════════════════════════════════════════════════
   KaiHouse – du-an-chi-tiet.css  (project detail page)
═══════════════════════════════════════════════════════════════════ */

/* ── Variables & Reset ──────────────────────────────────────────── */
:root{--navy:#07131f;--navy2:#0c1b2a;--gold:#d4a25a;--gold2:#c9983a;--text:#172233;--muted:#68717d;--line:#e8e4dd;--bg:#faf9f6}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font-body,Montserrat,Arial,sans-serif);color:var(--brand-text,var(--text));background:var(--brand-bg,#fff);font-size:var(--font-size-body,14px);line-height:1.6}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
p{margin:0 0 14px}
p:last-child{margin-bottom:0}
h1,h2,h3,h4{line-height:1.2}
.container{width:min(var(--container-width,1130px),calc(100% - 48px));margin:auto}
.section-label{margin:0 0 8px;text-transform:uppercase;color:var(--gold2);font-size:11px;font-weight:800;letter-spacing:.8px;display:block}

/* ── Buttons ────────────────────────────────────────────────────── */
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--btn-radius,2px);text-transform:uppercase;font-weight:800;font-size:var(--font-size-small,12px);height:42px;padding:0 26px;border:1px solid transparent;white-space:nowrap;transition:transform .25s,box-shadow .25s,background .25s,color .25s;cursor:pointer;font-family:inherit}
.btn:hover{transform:translateY(-2px)}
.btn-gold{background:linear-gradient(180deg,#e7bd75,#c98e37);color:#fff;box-shadow:0 6px 16px rgba(201,142,55,.2)}
.btn-outline{border-color:var(--line);color:var(--text);background:transparent}
.btn-outline:hover{background:var(--navy);color:#fff;border-color:var(--navy)}

/* ── Header ─────────────────────────────────────────────────────── */
.site-header{position:fixed;z-index:50;left:0;right:0;top:0;height:56px;background:#07131f;color:#fff;box-shadow:0 4px 14px rgba(0,0,0,.18)}
.header-inner{height:56px;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;min-width:210px}
.brand-mark{width:45px;height:35px;color:var(--gold);display:grid;place-items:center;flex:none}
.brand-mark svg{width:45px;height:35px;fill:none;stroke:currentColor;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}
.brand-text strong{display:block;font-size:19px;line-height:1;color:#fff;letter-spacing:1px}
.brand-text small{display:block;font-size:8px;color:#c9c9c9;letter-spacing:.8px}
.nav{flex:1;display:flex;align-items:center;justify-content:center;gap:31px;text-transform:uppercase;font-size:11px;font-weight:700}
.nav a{position:relative;flex:none;color:#f4f6f8;white-space:nowrap;transition:color .25s}
.nav a.active,.nav a:hover{color:var(--gold)}
.nav a:after{content:"";position:absolute;left:0;right:0;bottom:-12px;height:2px;background:var(--gold);transform:scaleX(0);transition:transform .25s}
.nav a.active:after,.nav a:hover:after{transform:scaleX(1)}
.header-actions{display:flex;align-items:center;gap:18px}
.phone{font-size:var(--font-size-small,12px);font-weight:700;white-space:nowrap}
.menu-toggle{display:none;background:transparent;border:0;color:#fff;font-size:24px}

/* ── Reveal animations ──────────────────────────────────────────── */
.reveal{opacity:0;transition:opacity .55s ease,transform .55s ease}
.reveal.visible{opacity:1;transform:none!important}
.reveal-up{transform:translateY(32px)}
.reveal-left{transform:translateX(-32px)}
.reveal-right{transform:translateX(32px)}
.delay-1{transition-delay:.08s}
.delay-2{transition-delay:.16s}
.delay-3{transition-delay:.24s}
.delay-4{transition-delay:.32s}
.delay-5{transition-delay:.40s}
.delay-6{transition-delay:.48s}

/* ══════════════════════════════════════════════════════════════════
   1. HERO
══════════════════════════════════════════════════════════════════ */
.pd-hero{
  position:relative;
  min-height:580px;
  background-size:cover;
  background-position:center top;
  background-repeat:no-repeat;
  display:flex;
  flex-direction:column;
  justify-content:flex-end;
}
.pd-hero::before{
  content:'';
  position:absolute;
  inset:0;
  background:linear-gradient(to right,
    rgba(7,19,31,.92) 0%,
    rgba(7,19,31,.88) 35%,
    rgba(7,19,31,.40) 60%,
    rgba(7,19,31,.08) 100%);
  pointer-events:none;
}
.pd-hero__body{position:relative;z-index:1;color:#fff}
.pd-hero__body>.container{padding-top:80px;padding-bottom:36px}

/* Breadcrumb */
.breadcrumb{display:flex;flex-wrap:wrap;align-items:center;gap:5px 0;font-size:11px;color:rgba(255,255,255,.55);margin-bottom:20px}
.breadcrumb .bc-home{display:flex;align-items:center;color:rgba(255,255,255,.8);transition:color .2s}
.breadcrumb .bc-home:hover{color:var(--gold)}
.breadcrumb .bc-sep{padding:0 8px;color:rgba(255,255,255,.3);font-size:11px}
.breadcrumb a{color:rgba(255,255,255,.55);transition:color .2s}
.breadcrumb a:hover{color:var(--gold)}
.breadcrumb strong{color:#fff;font-weight:600;max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* Category tag */
.pd-hero__tag{
  display:inline-block;
  font-size:10px;font-weight:800;
  text-transform:uppercase;letter-spacing:1px;
  color:var(--gold);
  border-left:2px solid var(--gold);
  padding:4px 10px;
  background:rgba(212,162,90,.12);
  margin-bottom:14px;
}
.pd-hero__h1{
  margin:0 0 16px;
  font-size:var(--font-size-h1,clamp(26px,4vw,46px));
  font-weight:800;
  color:#fff;
  max-width:720px;
}
.pd-hero__lead{
  margin:0;
  font-size:var(--font-size-body,14px);
  color:rgba(255,255,255,.72);
  max-width:640px;
  line-height:1.7;
}

/* Meta bar */
.pd-metabar{
  background:rgba(5,15,27,.58);
  border-top:1px solid rgba(255,255,255,.08);
  padding:18px 0;
  backdrop-filter:blur(4px);
}
.pd-metabar__row{display:flex;flex-wrap:wrap}
.pd-metaitem{
  display:flex;align-items:center;gap:12px;
  padding:6px 32px 6px 0;
  margin-right:32px;
  border-right:1px solid rgba(255,255,255,.12);
  color:#fff;
}
.pd-metaitem:last-child{border-right:none;margin-right:0}
.pd-metaitem svg{
  width:19px;height:19px;flex:none;
  fill:none;stroke:var(--gold);
  stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;
}
.pd-metaitem__k{display:block;font-size:10px;color:rgba(255,255,255,.45);text-transform:uppercase;font-weight:700;letter-spacing:.5px;margin-bottom:1px}
.pd-metaitem__v{display:block;font-size:13px;font-weight:700;color:#fff}

/* ══════════════════════════════════════════════════════════════════
   2. GALLERY
══════════════════════════════════════════════════════════════════ */
.pd-gallery{padding:52px 0 44px;background:#fff}
.pd-gallery__head{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:16px;
}
.pd-arrows{display:flex;gap:8px}
.pd-arrows button{
  width:32px;height:32px;
  border:1px solid var(--line);background:#fff;
  color:var(--gold2);border-radius:3px;
  font-size:20px;line-height:1;cursor:pointer;
  transition:background .2s,color .2s,border-color .2s;
}
.pd-arrows button:hover{background:var(--gold);color:#fff;border-color:var(--gold)}

.pd-gallery__grid{
  display:grid;
  grid-template-columns:1fr 284px;
  gap:8px;
  align-items:start;
}
.pd-gallery__main{
  margin:0;border-radius:4px;overflow:hidden;
  background:#e8ebee;position:relative;
}
.pd-gallery__main img{
  width:100%;height:400px;
  object-fit:cover;display:block;
  transition:opacity .3s ease;
}
.pd-gallery__thumbs{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:8px;
}
.pd-thumb{
  margin:0;border-radius:4px;overflow:hidden;
  background:#e8ebee;position:relative;cursor:pointer;
}
.pd-thumb img{
  width:100%;height:196px;
  object-fit:cover;display:block;
  transition:transform .35s ease;
}
.pd-thumb:hover img{transform:scale(1.06)}
.pd-thumb__overlay{
  position:absolute;inset:0;
  background:rgba(7,19,31,.0);
  transition:background .25s;
}
.pd-thumb:hover .pd-thumb__overlay{background:rgba(7,19,31,.18)}
.pd-thumb.is-active{box-shadow:0 0 0 2px var(--gold)}
.pd-thumb.is-active .pd-thumb__overlay{background:transparent}

/* ══════════════════════════════════════════════════════════════════
   3. INFO + SPECS
══════════════════════════════════════════════════════════════════ */
.pd-info{
  padding:60px 0;
  border-top:1px solid var(--line);
  background:#fff;
}
.pd-info__cols{
  display:grid;
  grid-template-columns:1fr 360px;
  gap:64px;
  align-items:start;
}
.pd-info__text{color:#5e6874;line-height:1.78;font-size:var(--font-size-body,14px);margin-bottom:36px}
.pd-info__text h3{color:var(--navy);font-size:var(--font-size-h3,16px);margin:20px 0 8px}
.pd-info__text p{margin-bottom:14px}
.pd-info__text ul{padding-left:18px;color:inherit}

/* 4 stat boxes */
.pd-stats{
  display:grid;
  grid-template-columns:repeat(2,1fr);
  gap:14px;
}
.pd-stat{
  display:flex;align-items:center;gap:14px;
  padding:18px 16px;
  background:var(--bg);
  border:1px solid var(--line);
  border-radius:4px;
}
.pd-stat__icon{
  flex:none;
  width:42px;height:42px;
  background:rgba(212,162,90,.12);
  border-radius:50%;
  display:grid;place-items:center;
}
.pd-stat__icon svg{
  width:18px;height:18px;
  fill:none;stroke:var(--gold2);
  stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;
}
.pd-stat__val{display:block;font-size:14px;font-weight:800;color:var(--navy);line-height:1.2;margin-bottom:3px}
.pd-stat__key{display:block;font-size:11px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px}

/* Specs checklist */
.pd-specs{list-style:none;margin:0;padding:0}
.pd-specs li{
  display:flex;align-items:flex-start;gap:12px;
  padding:13px 0;
  border-bottom:1px solid var(--line);
}
.pd-specs li:first-child{border-top:1px solid var(--line)}
.pd-specs__tick{
  flex:none;
  width:22px;height:22px;
  background:rgba(212,162,90,.12);
  border-radius:50%;
  display:grid;place-items:center;
  margin-top:2px;
}
.pd-specs__tick svg{
  width:12px;height:12px;
  fill:none;stroke:var(--gold2);
  stroke-width:2.5;stroke-linecap:round;stroke-linejoin:round;
}
.pd-specs li div{min-width:0}
.pd-specs li strong{display:block;font-size:12px;font-weight:700;color:var(--navy);margin-bottom:2px}
.pd-specs li span{display:block;font-size:13px;color:var(--muted)}

/* ══════════════════════════════════════════════════════════════════
   4. PRICING
══════════════════════════════════════════════════════════════════ */
.pd-pricing{
  background:#f3f1ec;
  padding:64px 0;
}
.pd-sh{margin-bottom:36px}
.pd-sh h2{margin:6px 0 0;font-size:var(--font-size-h2,clamp(20px,2.5vw,28px));color:var(--navy)}
.pd-sh--c{text-align:center}
.pd-sh--between{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;flex-wrap:wrap}

.pd-pricing__grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
}
.pd-pcard{
  background:#fff;border-radius:4px;overflow:hidden;
  border:1px solid var(--line);
  transition:transform .28s,box-shadow .28s;
}
.pd-pcard:hover{transform:translateY(-5px);box-shadow:0 24px 48px -20px rgba(10,24,38,.2)}
.pd-pcard__fig{
  margin:0;overflow:hidden;
  aspect-ratio:16/10;
}
.pd-pcard__fig img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.pd-pcard:hover .pd-pcard__fig img{transform:scale(1.07)}
.pd-pcard__body{padding:20px}
.pd-pcard__type{
  display:inline-block;
  font-size:10px;font-weight:800;
  text-transform:uppercase;letter-spacing:.6px;
  color:var(--gold2);margin-bottom:8px;
}
.pd-pcard__body h3{margin:0 0 8px;font-size:14px;line-height:1.35;color:var(--navy)}
.pd-pcard__body>p{margin:0 0 12px;font-size:12px;color:var(--muted);line-height:1.55}
.pd-pcard__price{
  font-size:13px;font-weight:700;
  color:var(--gold);
  margin:0 0 16px;
}
.pd-pcard__btn{
  display:inline-flex;align-items:center;
  background:linear-gradient(180deg,#e7bd75,#c98e37);
  color:#fff;
  font-size:11px;font-weight:700;
  padding:9px 18px;border-radius:2px;
  text-transform:uppercase;letter-spacing:.5px;
  border:none;
  transition:opacity .2s,transform .2s;
}
.pd-pcard__btn:hover{opacity:.85;transform:translateY(-1px)}

/* ══════════════════════════════════════════════════════════════════
   5. PROCESS
══════════════════════════════════════════════════════════════════ */
.pd-process{
  background:var(--navy);
  padding:64px 0 72px;
}
.pd-process .section-label{color:var(--gold)}
.pd-process .pd-sh h2{color:#fff}
.pd-process__row{
  display:grid;
  grid-template-columns:repeat(6,1fr);
  gap:4px;
  margin-top:48px;
  position:relative;
}
.pd-process__row::before{
  content:'';
  position:absolute;
  top:27px;left:calc(100%/12);right:calc(100%/12);
  height:1px;
  border-top:1px dashed rgba(212,162,90,.3);
  pointer-events:none;
}
.pd-step{
  text-align:center;
  padding:0 8px;
  position:relative;
  z-index:1;
}
.pd-step__num{
  width:56px;height:56px;
  border:2px solid var(--gold);
  border-radius:50%;
  display:grid;place-items:center;
  margin:0 auto 18px;
  font-size:15px;font-weight:800;
  color:var(--gold);
  background:var(--navy);
}
.pd-step h4{margin:0 0 10px;font-size:12px;font-weight:700;color:#e4e8ec;line-height:1.35}
.pd-step p{margin:0;font-size:11px;color:rgba(255,255,255,.42);line-height:1.6}

/* ══════════════════════════════════════════════════════════════════
   6. RECENT – overlay cards
══════════════════════════════════════════════════════════════════ */
.pd-recent{
  padding:64px 0;
  background:var(--bg);
  border-top:1px solid var(--line);
}
.pd-recent__grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:16px;
  margin-top:28px;
}
.pd-ocard{
  display:block;
  position:relative;
  border-radius:4px;overflow:hidden;
  aspect-ratio:3/4;
  background:#1a2432;
}
.pd-ocard figure{
  margin:0;
  position:absolute;inset:0;
}
.pd-ocard figure img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .4s ease,opacity .4s;
}
.pd-ocard:hover figure img{transform:scale(1.07);opacity:.85}
.pd-ocard::after{
  content:'';
  position:absolute;inset:0;
  background:linear-gradient(to top,
    rgba(7,19,31,.88) 0%,
    rgba(7,19,31,.45) 45%,
    rgba(7,19,31,.08) 100%);
  transition:background .3s;
}
.pd-ocard:hover::after{
  background:linear-gradient(to top,
    rgba(7,19,31,.92) 0%,
    rgba(7,19,31,.55) 50%,
    rgba(7,19,31,.12) 100%);
}
.pd-ocard__body{
  position:absolute;
  bottom:0;left:0;right:0;
  z-index:1;
  padding:20px 18px;
  color:#fff;
}
.pd-ocard__cat{
  display:block;
  font-size:10px;font-weight:800;
  text-transform:uppercase;letter-spacing:.6px;
  color:var(--gold);
  margin-bottom:6px;
}
.pd-ocard__body h3{
  margin:0 0 4px;
  font-size:13px;font-weight:700;
  color:#fff;line-height:1.35;
}
.pd-ocard__body p{
  margin:0;
  font-size:11px;
  color:rgba(255,255,255,.55);
}

/* ══════════════════════════════════════════════════════════════════
   7. RELATED – standard cards
══════════════════════════════════════════════════════════════════ */
.pd-related{
  padding:64px 0 72px;
  border-top:1px solid var(--line);
  background:#fff;
}
.pd-related__grid{
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:20px;
  margin-top:28px;
}
.pd-rcard{
  display:block;border-radius:4px;overflow:hidden;
  border:1px solid var(--line);background:#fff;
  transition:transform .28s,box-shadow .28s;
}
.pd-rcard:hover{transform:translateY(-4px);box-shadow:0 18px 36px -16px rgba(10,24,38,.18)}
.pd-rcard__fig{
  margin:0;overflow:hidden;
  aspect-ratio:4/3;
}
.pd-rcard__fig img{
  width:100%;height:100%;
  object-fit:cover;
  transition:transform .35s;
}
.pd-rcard:hover .pd-rcard__fig img{transform:scale(1.06)}
.pd-rcard__body{padding:14px 16px}
.pd-rcard__body span{
  display:block;
  font-size:10px;font-weight:800;
  text-transform:uppercase;letter-spacing:.5px;
  color:var(--gold2);margin-bottom:5px;
}
.pd-rcard__body h3{margin:0 0 5px;font-size:13px;line-height:1.35;color:var(--navy)}
.pd-rcard__body p{margin:0;font-size:11px;color:var(--muted)}

/* ── 404 ────────────────────────────────────────────────────────── */
.pd-404{padding:120px 0 80px;text-align:center}
.pd-404 .section-label{font-size:32px;color:var(--line)}
.pd-404 h1{margin:0 0 12px;font-size:28px;color:var(--navy)}
.pd-404 p{color:var(--muted);margin:0 0 28px}

/* ── Footer ─────────────────────────────────────────────────────── */
.footer{background:#07131f;color:#cfd5dc;padding:30px 0 0}
.footer-grid{display:grid;grid-template-columns:1.35fr .8fr 1fr 1.2fr 1.15fr;gap:32px}
.footer h3{text-transform:uppercase;color:var(--gold);font-size:var(--font-size-small,13px);margin:0 0 14px}
.footer p,.footer a{display:block;font-size:var(--font-size-small,12px);color:#b9c0c8;margin:0 0 7px}
.footer-brand{margin-bottom:14px}
.social{display:flex;gap:8px}
.social a{width:28px;height:28px;border:1px solid #6e7884;border-radius:50%;display:grid;place-items:center;font-size:10px}
.footer form{display:flex;border:1px solid #344253;height:38px;margin-top:12px}
.footer input{flex:1;background:transparent;border:0;color:#fff;padding:0 10px;min-width:0}
.footer button{width:44px;background:var(--gold);border:0;color:#fff;cursor:pointer}
.copyright{text-align:center;border-top:1px solid #152536;margin-top:20px;padding:12px;color:#b7bec7;font-size:var(--font-size-small,12px)}

/* ══════════════════════════════════════════════════════════════════
   RESPONSIVE
══════════════════════════════════════════════════════════════════ */
@media(max-width:1100px){
  .container{width:min(960px,calc(100% - 36px))}
  .footer-grid{grid-template-columns:repeat(3,1fr)}
  .pd-pricing__grid{grid-template-columns:repeat(2,1fr)}
  .pd-recent__grid{grid-template-columns:repeat(2,1fr)}
  .pd-related__grid{grid-template-columns:repeat(2,1fr)}
  .pd-process__row{grid-template-columns:repeat(3,1fr);gap:32px;row-gap:40px}
  .pd-process__row::before{display:none}
}
@media(max-width:960px){
  .nav{display:none;position:absolute;left:0;right:0;top:56px;background:#07131f;flex-direction:column;text-align:center;padding:20px;gap:16px}
  .nav.open{display:flex}
  .nav a:after{display:none}
  .menu-toggle{display:block}
  .phone{display:none}
  .pd-gallery__grid{grid-template-columns:1fr}
  .pd-gallery__main img{height:320px}
  .pd-gallery__thumbs{grid-template-columns:repeat(4,1fr)}
  .pd-gallery__thumbs .pd-thumb img{height:110px}
  .pd-info__cols{grid-template-columns:1fr;gap:40px}
  .pd-metabar__row{flex-wrap:wrap;gap:4px}
  .pd-metaitem{padding:6px 20px 6px 0;margin-right:20px}
  .pd-sh--between{flex-direction:column;align-items:flex-start}
}
@media(max-width:720px){
  .container{width:calc(100% - 32px)}
  .header-actions .btn{display:none}
  .pd-hero{min-height:460px}
  .pd-hero__body>.container{padding-top:70px}
  .pd-metabar{padding:14px 0}
  .pd-metaitem{padding:5px 14px 5px 0;margin-right:14px}
  .pd-gallery__thumbs{grid-template-columns:repeat(2,1fr)}
  .pd-gallery__thumbs .pd-thumb img{height:120px}
  .pd-gallery__main img{height:260px}
  .pd-pricing__grid{grid-template-columns:1fr}
  .pd-process__row{grid-template-columns:repeat(2,1fr);gap:28px}
  .pd-recent__grid{grid-template-columns:repeat(2,1fr)}
  .pd-related__grid{grid-template-columns:repeat(2,1fr)}
  .pd-stats{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:480px){
  .pd-hero{min-height:400px}
  .pd-gallery__thumbs{grid-template-columns:1fr 1fr}
  .pd-gallery__main img{height:220px}
  .pd-process__row{grid-template-columns:1fr;gap:24px}
  .pd-recent__grid{grid-template-columns:1fr}
  .pd-related__grid{grid-template-columns:1fr 1fr}
  .pd-stats{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .brand{min-width:auto}
  .brand-text strong{font-size:15px}
}


/* ── Gallery caption (added for all-image gallery + caption display) ─── */
.pd-gallery__caption {
  margin-top: 14px;
  padding: 13px 18px;
  min-height: 52px;
  background: #f7f6f2;
  border-left: 3px solid #c8a96e;
  border-radius: 0 4px 4px 0;
  font-size: 0.9rem;
  color: #444d58;
  line-height: 1.7;
  transition: opacity .25s;
}

/* Thumb grid — allow unlimited rows (was fixed at 4 items/2x2) */
.pd-gallery__thumbs {
  max-height: 420px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: #c8a96e #f0ede8;
}
.pd-gallery__thumbs::-webkit-scrollbar { width: 5px; }
.pd-gallery__thumbs::-webkit-scrollbar-track { background: #f0ede8; }
.pd-gallery__thumbs::-webkit-scrollbar-thumb { background: #c8a96e; border-radius: 3px; }
@media(max-width:960px){
  .pd-gallery__thumbs { max-height: none; overflow-y: visible; }
}