/* ============================================================
   榮興屋宇裝備工程有限公司 — Building Services Engineering
   Aesthetic: engineering blueprint · warm paper · ink · burnt amber
   ============================================================ */
:root{
  --paper:#F2EFE7;        /* warm engineering paper           */
  --paper-2:#FBFAF6;      /* card surface                     */
  --ink:#14181F;          /* near-black ink                   */
  --ink-2:#39414F;        /* secondary text                   */
  --ink-3:#6B7383;        /* muted                            */
  --line:rgba(20,24,31,.14);
  --line-2:rgba(20,24,31,.08);
  --amber:#C8551B;        /* burnt amber — primary accent     */
  --amber-2:#E26A1C;      /* brighter amber for hovers        */
  --amber-wash:rgba(200,85,27,.08);
  --steel:#27566F;        /* technical steel blue (secondary) */
  --steel-wash:rgba(39,86,111,.07);
  --ok:#2f6b3f;
  --serif:"Noto Serif TC",serif;
  --sans:"Noto Sans TC",-apple-system,sans-serif;
  --mono:"IBM Plex Mono",ui-monospace,monospace;
  --maxw:1200px;
  --r:3px;
  --shadow:0 1px 0 var(--line),0 18px 40px -28px rgba(20,24,31,.5);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:var(--sans);color:var(--ink);background:var(--paper);
  line-height:1.8;font-weight:300;letter-spacing:.01em;
  font-size:16px;overflow-x:hidden;
  text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;
}
/* faint blueprint grid over the whole page */
body::before{
  content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
  background-image:
    linear-gradient(var(--line-2) 1px,transparent 1px),
    linear-gradient(90deg,var(--line-2) 1px,transparent 1px);
  background-size:46px 46px;opacity:.6;
  -webkit-mask-image:radial-gradient(circle at 50% 0,#000,transparent 85%);
          mask-image:radial-gradient(circle at 50% 0,#000,transparent 85%);
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px;position:relative;z-index:1}
.mono{font-family:var(--mono);font-weight:500;letter-spacing:.06em}
.serif{font-family:var(--serif)}

/* ---------- eyebrow / section label ---------- */
.eyebrow{
  font-family:var(--mono);font-size:.72rem;letter-spacing:.34em;
  color:var(--amber);text-transform:uppercase;font-weight:600;
  display:inline-flex;align-items:center;gap:.7em;
}
.eyebrow::before{content:"";width:30px;height:1px;background:var(--amber)}
.kicker-num{font-family:var(--mono);color:var(--amber);font-weight:600;font-size:.85rem}

h1,h2,h3,h4{font-family:var(--serif);font-weight:700;line-height:1.28;letter-spacing:.01em}
h2.sec-title{font-size:clamp(1.7rem,3.6vw,2.7rem);font-weight:900;margin:.5rem 0 1rem;letter-spacing:.02em}
.lead{font-size:1.06rem;color:var(--ink-2);max-width:60ch}

/* ---------- buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:.6em;cursor:pointer;
  font-family:var(--sans);font-weight:500;font-size:.95rem;letter-spacing:.04em;
  padding:.92em 1.6em;border-radius:var(--r);border:1px solid transparent;
  transition:transform .25s cubic-bezier(.2,.7,.3,1),background .25s,color .25s,box-shadow .25s;
  position:relative;
}
.btn .arr{transition:transform .25s}
.btn:hover .arr{transform:translateX(4px)}
.btn-primary{background:var(--amber);color:#fff;box-shadow:0 12px 24px -14px rgba(200,85,27,.85)}
.btn-primary:hover{background:var(--amber-2);transform:translateY(-2px)}
.btn-ghost{background:transparent;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--ink);transform:translateY(-2px)}
.btn-light{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.28)}
.btn-light:hover{background:rgba(255,255,255,.2)}

/* ---------- top bar ---------- */
header.nav{position:sticky;top:0;z-index:50;background:rgba(242,239,231,.82);
  backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:.7rem;font-family:var(--serif);font-weight:900;font-size:1.14rem;letter-spacing:.02em}
.brand .logo{width:38px;height:38px;flex:none}
.brand small{display:block;font-family:var(--mono);font-weight:500;font-size:.56rem;letter-spacing:.22em;color:var(--ink-3);margin-top:2px}
.menu{display:flex;align-items:center;gap:2px;list-style:none}
.menu a{display:block;padding:.55em .95em;font-size:.95rem;color:var(--ink-2);border-radius:var(--r);transition:color .2s,background .2s;position:relative}
.menu a:hover{color:var(--ink)}
.menu a.active{color:var(--ink);font-weight:500}
.menu a.active::after{content:"";position:absolute;left:.95em;right:.95em;bottom:.3em;height:2px;background:var(--amber)}
.menu .shop{color:var(--amber);font-weight:500}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-tel{font-family:var(--mono);font-weight:600;font-size:.92rem;color:var(--ink);white-space:nowrap}
.nav-tel span{color:var(--ink-3);font-size:.62rem;letter-spacing:.2em;display:block}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line);border-radius:var(--r);background:none;cursor:pointer;flex-direction:column;gap:5px;align-items:center;justify-content:center}
.burger i{width:18px;height:1.5px;background:var(--ink);transition:.3s}
.burger.open i:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.burger.open i:nth-child(2){opacity:0}
.burger.open i:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}

/* ---------- hero ---------- */
.hero{position:relative;padding:clamp(46px,7vw,96px) 0 clamp(56px,8vw,110px);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:54px;align-items:center}
.hero h1{font-size:clamp(2.1rem,5.4vw,4rem);font-weight:900;letter-spacing:.015em;margin:1.1rem 0 1.3rem}
.hero h1 .hl{color:var(--amber);position:relative;white-space:nowrap}
.hero .lead{font-size:1.12rem;line-height:1.95}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-top:2rem}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:2rem}
.tag{font-family:var(--mono);font-size:.74rem;letter-spacing:.05em;color:var(--ink-2);border:1px solid var(--line);border-radius:30px;padding:.42em 1em;background:var(--paper-2)}
.tag b{color:var(--amber);font-weight:600}
.hero-visual{position:relative}
.schematic{width:100%;height:auto;filter:drop-shadow(0 30px 50px rgba(20,24,31,.16))}
.schematic .draw{stroke-dasharray:1400;stroke-dashoffset:1400;animation:draw 2.4s .3s ease forwards}
@keyframes draw{to{stroke-dashoffset:0}}
.spec-tick{position:absolute;font-family:var(--mono);font-size:.64rem;letter-spacing:.12em;color:var(--ink-3)}

/* ---------- stats band ---------- */
.stats{background:var(--ink);color:#fff;position:relative;z-index:1}
.stats-in{display:grid;grid-template-columns:repeat(4,1fr);gap:0}
.stat{padding:38px 26px;border-left:1px solid rgba(255,255,255,.1)}
.stat:first-child{border-left:none}
.stat .n{font-family:var(--serif);font-weight:900;font-size:2.7rem;line-height:1;color:#fff}
.stat .n .u{color:var(--amber-2);font-size:1.3rem}
.stat .l{margin-top:.7rem;color:rgba(255,255,255,.66);font-size:.92rem;letter-spacing:.04em}

/* ---------- generic section ---------- */
section.block{padding:clamp(60px,8vw,108px) 0;position:relative}
.sec-head{max-width:760px;margin-bottom:48px}
.sec-head.center{margin-inline:auto;text-align:center}
.sec-head.center .eyebrow{justify-content:center}

/* ---------- services grid ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:34px 30px 30px;position:relative;transition:transform .3s cubic-bezier(.2,.7,.3,1),box-shadow .3s,border-color .3s;overflow:hidden}
.svc::before{content:"";position:absolute;left:0;top:0;height:3px;width:0;background:var(--amber);transition:width .4s ease}
.svc:hover{transform:translateY(-6px);box-shadow:var(--shadow);border-color:transparent}
.svc:hover::before{width:100%}
.svc .ico{width:56px;height:56px;border:1px solid var(--line);border-radius:var(--r);display:grid;place-items:center;margin-bottom:22px;background:#fff;transition:border-color .3s,background .3s}
.svc:hover .ico{border-color:var(--amber);background:var(--amber-wash)}
.svc .ico svg{width:30px;height:30px;color:var(--steel);transition:color .3s}
.svc:hover .ico svg{color:var(--amber)}
.svc .no{position:absolute;top:26px;right:28px;font-family:var(--mono);font-size:.78rem;color:var(--ink-3);letter-spacing:.1em}
.svc h3{font-size:1.28rem;font-weight:700;margin-bottom:.6rem}
.svc p{color:var(--ink-2);font-size:.97rem;line-height:1.85}
.svc .more{display:inline-flex;align-items:center;gap:.5em;margin-top:1.1rem;font-family:var(--mono);font-size:.78rem;letter-spacing:.08em;color:var(--amber);font-weight:600}
.svc .more .arr{transition:transform .25s}
.svc:hover .more .arr{transform:translateX(4px)}

/* ---------- why us (split) ---------- */
.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:60px;align-items:center}
.why-list{display:grid;gap:8px}
.why{display:grid;grid-template-columns:auto 1fr;gap:20px;padding:24px 4px;border-top:1px solid var(--line)}
.why:last-child{border-bottom:1px solid var(--line)}
.why .wn{font-family:var(--mono);color:var(--amber);font-weight:600;font-size:.92rem;padding-top:.2rem}
.why h4{font-size:1.16rem;font-weight:700;margin-bottom:.35rem}
.why p{color:var(--ink-2);font-size:.96rem}
.frame{position:relative;border:1px solid var(--line);background:var(--paper-2);padding:40px;border-radius:var(--r)}
.frame::before,.frame::after{content:"";position:absolute;width:16px;height:16px;border:2px solid var(--amber)}
.frame::before{top:-1px;left:-1px;border-right:none;border-bottom:none}
.frame::after{bottom:-1px;right:-1px;border-left:none;border-top:none}

/* ---------- process ---------- */
.steps{display:grid;grid-template-columns:repeat(5,1fr);gap:0;counter-reset:s}
.step{padding:30px 22px 26px;border-left:1px solid var(--line);position:relative}
.step:first-child{border-left:none}
.step .sn{font-family:var(--mono);font-weight:600;color:var(--amber);font-size:.92rem;letter-spacing:.1em}
.step .dot{width:13px;height:13px;border-radius:50%;background:var(--paper);border:2px solid var(--amber);margin:18px 0;position:relative}
.step .dot::after{content:"";position:absolute;left:13px;top:50%;width:calc(100% + 22px);height:1px;background:var(--line)}
.step:last-child .dot::after{display:none}
.step h4{font-size:1.08rem;margin-bottom:.4rem}
.step p{font-size:.9rem;color:var(--ink-2)}

/* ---------- sectors ---------- */
.sectors{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.sector{display:flex;align-items:center;gap:16px;padding:22px 24px;background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);transition:.3s}
.sector:hover{border-color:var(--amber);background:#fff;transform:translateY(-3px)}
.sector svg{width:26px;height:26px;flex:none;color:var(--steel)}
.sector b{font-weight:500;font-size:1.02rem}
.sector span{display:block;font-family:var(--mono);font-size:.68rem;color:var(--ink-3);letter-spacing:.08em}

/* ---------- CTA band ---------- */
.cta{background:var(--ink);color:#fff;border-radius:var(--r);padding:clamp(40px,6vw,68px);position:relative;overflow:hidden}
.cta::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:40px 40px;-webkit-mask-image:radial-gradient(circle at 80% 20%,#000,transparent 70%);mask-image:radial-gradient(circle at 80% 20%,#000,transparent 70%)}
.cta-in{position:relative;display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.cta h2{color:#fff;font-size:clamp(1.6rem,3.4vw,2.4rem);font-weight:900}
.cta p{color:rgba(255,255,255,.7);margin-top:.7rem;max-width:48ch}
.cta .amber{color:var(--amber-2)}

/* ---------- detailed service rows (services page) ---------- */
.svc-detail{display:grid;grid-template-columns:auto 1fr;gap:38px;padding:44px 0;border-top:1px solid var(--line);align-items:start}
.svc-detail:last-child{border-bottom:1px solid var(--line)}
.svc-detail .big-ico{width:88px;height:88px;border:1px solid var(--line);border-radius:var(--r);display:grid;place-items:center;background:var(--paper-2)}
.svc-detail .big-ico svg{width:46px;height:46px}
.svc-detail h3{font-size:1.55rem;font-weight:900;margin-bottom:.2rem}
.svc-detail .sub{font-family:var(--mono);font-size:.74rem;letter-spacing:.14em;color:var(--amber);text-transform:uppercase}
.svc-detail p{color:var(--ink-2);margin:1rem 0 1.3rem;max-width:70ch}
.chips{display:flex;flex-wrap:wrap;gap:9px}
.chip{font-size:.86rem;color:var(--ink-2);background:var(--steel-wash);border:1px solid var(--line-2);padding:.42em .95em;border-radius:30px}
.chip::before{content:"·";color:var(--amber);margin-right:.4em;font-weight:700}

/* ---------- about ---------- */
.vmv{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.vmv .card{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:34px 30px}
.vmv .card .t{font-family:var(--mono);font-size:.72rem;letter-spacing:.2em;color:var(--amber);text-transform:uppercase}
.vmv .card h3{font-size:1.35rem;margin:.6rem 0 .8rem}
.vmv .card p{color:var(--ink-2);font-size:.97rem}
.creds{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}
.cred{display:flex;gap:16px;align-items:flex-start;padding:22px;border:1px solid var(--line);border-radius:var(--r);background:var(--paper-2)}
.cred svg{width:26px;height:26px;color:var(--amber);flex:none;margin-top:3px}
.cred b{font-weight:500}
.cred p{font-size:.9rem;color:var(--ink-3);margin-top:.2rem}

/* ---------- projects / sectors detail ---------- */
.proj-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.proj{border:1px solid var(--line);border-radius:var(--r);background:var(--paper-2);overflow:hidden;transition:.3s}
.proj:hover{box-shadow:var(--shadow);transform:translateY(-4px)}
.proj .top{padding:18px 26px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;font-family:var(--mono);font-size:.74rem;letter-spacing:.1em;color:var(--ink-3)}
.proj .top .tag2{color:var(--amber);font-weight:600}
.proj .body{padding:24px 26px 28px}
.proj h4{font-size:1.2rem;margin-bottom:.5rem}
.proj p{font-size:.94rem;color:var(--ink-2)}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:.95fr 1.05fr;gap:50px}
.cinfo .row{display:flex;gap:18px;padding:24px 0;border-bottom:1px solid var(--line)}
.cinfo .row:first-child{border-top:1px solid var(--line)}
.cinfo .row svg{width:24px;height:24px;color:var(--amber);flex:none;margin-top:4px}
.cinfo .row .k{font-family:var(--mono);font-size:.7rem;letter-spacing:.16em;color:var(--ink-3);text-transform:uppercase}
.cinfo .row .v{font-size:1.08rem;font-weight:500;margin-top:.25rem}
.cinfo .row .v a:hover{color:var(--amber)}
form.enquiry{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:38px}
.field{margin-bottom:18px}
.field label{display:block;font-family:var(--mono);font-size:.72rem;letter-spacing:.12em;color:var(--ink-2);text-transform:uppercase;margin-bottom:.5rem}
.field label .req{color:var(--amber)}
.field input,.field select,.field textarea{width:100%;font-family:var(--sans);font-size:1rem;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:.85em 1em;transition:border-color .2s,box-shadow .2s}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--amber);box-shadow:0 0 0 3px var(--amber-wash)}
.field textarea{resize:vertical;min-height:120px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-note{font-size:.82rem;color:var(--ink-3);margin-top:14px;line-height:1.7}

/* ---------- page hero (inner) ---------- */
.page-hero{background:var(--ink);color:#fff;padding:clamp(54px,8vw,96px) 0 clamp(46px,6vw,72px);position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(circle at 15% 30%,#000,transparent 75%);mask-image:radial-gradient(circle at 15% 30%,#000,transparent 75%)}
.page-hero .eyebrow{color:var(--amber-2)}
.page-hero .eyebrow::before{background:var(--amber-2)}
.page-hero h1{font-size:clamp(2rem,5vw,3.3rem);font-weight:900;margin:1rem 0 .9rem;color:#fff}
.page-hero p{color:rgba(255,255,255,.72);max-width:62ch;font-size:1.06rem}
.crumb{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;color:rgba(255,255,255,.5)}
.crumb a:hover{color:#fff}

/* ---------- footer ---------- */
footer{background:#0C0F15;color:rgba(255,255,255,.7);padding:64px 0 30px;position:relative;z-index:1}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand{font-family:var(--serif);font-weight:900;font-size:1.2rem;color:#fff;display:flex;align-items:center;gap:.6rem}
.foot-brand .logo{width:34px;height:34px}
.foot p.desc{margin-top:1.1rem;font-size:.92rem;line-height:1.9;max-width:34ch}
.foot h5{color:#fff;font-family:var(--mono);font-size:.74rem;letter-spacing:.18em;text-transform:uppercase;margin-bottom:1.1rem;font-weight:600}
.foot ul{list-style:none}
.foot ul li{margin-bottom:.7rem}
.foot ul a{font-size:.93rem;transition:.2s}
.foot ul a:hover{color:var(--amber-2)}
.foot .c-row{font-size:.92rem;margin-bottom:.7rem;display:flex;gap:.6rem}
.foot .c-row span{color:rgba(255,255,255,.45);font-family:var(--mono);font-size:.78rem}
.copy{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;padding-top:24px;font-size:.82rem;color:rgba(255,255,255,.45);font-family:var(--mono);letter-spacing:.04em}

/* ---------- reveal ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.2,.7,.3,1),transform .7s cubic-bezier(.2,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}

/* hero load animation */
.fade-up{opacity:0;transform:translateY(22px);animation:fadeUp .9s cubic-bezier(.2,.7,.3,1) forwards}
@keyframes fadeUp{to{opacity:1;transform:none}}
.dly1{animation-delay:.05s}.dly2{animation-delay:.18s}.dly3{animation-delay:.31s}.dly4{animation-delay:.44s}.dly5{animation-delay:.57s}

/* ---------- responsive ---------- */
@media(max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:38px}
  .hero-visual{order:-1;max-width:440px}
  .split{grid-template-columns:1fr;gap:36px}
  .contact-grid{grid-template-columns:1fr;gap:34px}
  .stats-in{grid-template-columns:1fr 1fr}
  .stat:nth-child(3){border-left:none}
  .stat{border-top:1px solid rgba(255,255,255,.1)}
  .stat:nth-child(-n+2){border-top:none}
  .steps{grid-template-columns:1fr 1fr}
  .step .dot::after{display:none}
}
@media(max-width:760px){
  .menu,.nav-tel span{display:none}
  .burger{display:flex}
  .nav-cta .nav-tel{display:none}
  .menu.show{display:flex;position:absolute;top:74px;left:0;right:0;flex-direction:column;background:var(--paper);border-bottom:1px solid var(--line);padding:14px 22px;gap:2px;box-shadow:0 24px 30px -20px rgba(0,0,0,.3)}
  .menu.show a{padding:.85em .4em;border-bottom:1px solid var(--line-2)}
  .svc-grid,.sectors,.vmv,.proj-grid,.creds{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .step{border-left:none;border-top:1px solid var(--line)}
  .step:first-child{border-top:none}
  .stats-in{grid-template-columns:1fr 1fr}
  .two{grid-template-columns:1fr}
  .svc-detail{grid-template-columns:1fr;gap:20px}
  .cta-in{flex-direction:column;align-items:flex-start}
}