:root{
  --bg:#F7F4EF; --surface:#FFFFFF; --tint:#EFEAE2; --line:#E0D8CC;
  --ink:#232120; --ink-2:#55504B; --ink-3:#857D74;
  --copper:#C6884D; --copper-d:#9A5F2B; --copper-l:#F3E4D3;
  --navy:#16262D; --navy-2:#1F3540; --on-dark:#E9E4DC; --on-dark-2:#A9B3B7;
  --sans:"IBM Plex Sans","Noto Sans HK",system-ui,sans-serif;
  --display:"Archivo","Noto Sans HK",system-ui,sans-serif;
  --mono:"IBM Plex Mono","Noto Sans HK",ui-monospace,monospace;
  --r:6px; --wrap:1200px;
  --s-section:clamp(4rem,9vw,7.5rem);
}
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--sans);font-size:1rem;line-height:1.65;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit}
h1,h2,h3{font-family:var(--display);line-height:1.15;margin:0;letter-spacing:-.015em;text-wrap:balance}
p{margin:0}
.mono{font-family:var(--mono)}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 clamp(1.25rem,4vw,2.5rem)}

/* language */
html[data-lang="zh"] .en{display:none!important}
html[data-lang="en"] .zh{display:none!important}
html[lang="zh-HK"] body{line-height:1.75}

.skip{position:absolute;left:-999px;top:0;background:var(--navy);color:#fff;padding:.5rem 1rem;z-index:100}
.skip:focus{left:1rem;top:1rem}
:focus-visible{outline:2px solid var(--copper-d);outline-offset:3px;border-radius:2px}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(247,244,239,.92);backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:border-color .2s,box-shadow .2s}
.site-header.scrolled{border-color:var(--line);box-shadow:0 1px 12px rgba(35,33,32,.05)}
.header-inner{display:flex;align-items:center;gap:2rem;height:72px}
.brand img{height:44px;width:auto}
.nav{display:flex;gap:1.75rem;margin-left:auto}
.nav a{text-decoration:none;font-weight:500;font-size:.95rem;color:var(--ink-2);transition:color .15s}
.nav a:hover{color:var(--copper-d)}
.header-actions{display:flex;align-items:center;gap:.75rem}
.lang-toggle{font-family:var(--mono);font-size:.85rem;background:none;border:1px solid var(--line);border-radius:999px;padding:.4rem .8rem;cursor:pointer;color:var(--ink-3)}
.lang-toggle:hover{border-color:var(--copper)}
.lt-sep{margin:0 .25rem;opacity:.5}
html[data-lang="zh"] .lt-zh,html[data-lang="en"] .lt-en{color:var(--ink);font-weight:600}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:.5rem;font-family:var(--sans);font-weight:600;font-size:1rem;text-decoration:none;padding:.85rem 1.4rem;border-radius:var(--r);border:1px solid transparent;cursor:pointer;transition:background .15s,color .15s,border-color .15s,transform .15s}
.btn-primary{background:var(--copper-d);color:#fff}
.btn-primary:hover{background:#82501F}
.btn-ghost{border-color:var(--ink-3);color:var(--ink)}
.btn-ghost:hover{border-color:var(--copper-d);color:var(--copper-d)}
.btn-sm{padding:.5rem 1rem;font-size:.9rem}
.btn-block{width:100%}

.eyebrow{display:inline-flex;align-items:center;gap:.6rem;font-size:.8rem;letter-spacing:.06em;text-transform:uppercase;color:var(--copper-d);margin-bottom:1.1rem}
.eyebrow.light{color:var(--copper)}
.dot{width:8px;height:8px;border-radius:50%;background:#3FA66B;box-shadow:0 0 0 4px rgba(63,166,107,.18);animation:pulse 2.4s ease-in-out infinite}
@keyframes pulse{50%{box-shadow:0 0 0 7px rgba(63,166,107,0)}}

/* hero */
.hero{padding:clamp(3rem,7vw,5.5rem) 0 clamp(3rem,6vw,4.5rem)}
.hero-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(1.5rem,4vw,4rem);align-items:end}
.hero-media{grid-column:1 / -1}
.hero h1{font-size:clamp(2.4rem,1.2rem + 4vw,4.4rem);font-weight:800}
html[data-lang="zh"] .hero h1{letter-spacing:0;line-height:1.2}
.nw{white-space:nowrap}
.hero h1 em{font-style:normal;color:var(--copper-d)}
.lead{font-size:clamp(1.05rem,1rem + .3vw,1.2rem);color:var(--ink-2);margin-top:1.4rem;max-width:36em}
.hero-side .lead{margin-top:0}
.hero-media{margin-top:clamp(.5rem,2vw,1.5rem)!important}
.hero-cta{display:flex;flex-wrap:wrap;gap:.8rem;margin-top:2rem}
.hero-media{position:relative;margin:0}
.hero-media img{border-radius:10px;width:100%;height:auto;border:6px solid var(--navy);box-shadow:0 30px 70px -30px rgba(22,38,45,.55)}
.readout{position:absolute;left:-1.5rem;bottom:1.5rem;background:var(--navy);color:var(--on-dark);border-radius:var(--r);padding:.9rem 1rem;display:grid;gap:.35rem;font-size:.78rem;min-width:220px;box-shadow:0 12px 30px -10px rgba(0,0,0,.4);border-left:3px solid var(--copper)}
.ro-row{display:flex;justify-content:space-between;gap:1.5rem}
.ro-row span{color:var(--on-dark-2)}
.ro-row b{font-weight:500;color:#7FD3A0}
.ro-alarm b{color:var(--copper)}

/* ticker */
.ticker{overflow:hidden;border-block:1px solid var(--line);background:var(--surface);padding:1rem 0}
.ticker-track{display:flex;gap:2.75rem;width:max-content;animation:tick 48s linear infinite;font-size:.9rem;color:var(--ink-3);white-space:nowrap}
.ticker-track span::before{content:"◆";color:var(--copper);font-size:.55rem;margin-right:.9rem;vertical-align:middle}
@keyframes tick{to{transform:translateX(-50%)}}

/* sections */
.section{padding:var(--s-section) 0}
.section-tint{background:var(--tint)}
.section-head{max-width:46rem;margin-bottom:clamp(2.25rem,4vw,3.5rem)}
.section h2{font-size:clamp(1.8rem,1.1rem + 2.4vw,2.9rem);font-weight:700}
.section-sub{color:var(--ink-2);margin-top:1rem;font-size:1.08rem}

/* services */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem}
.svc{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:1.75rem;display:flex;flex-direction:column;gap:.75rem;transition:transform .2s,box-shadow .2s,border-color .2s}
.svc:hover{transform:translateY(-3px);box-shadow:0 18px 36px -24px rgba(22,38,45,.35);border-color:#D2C6B6}
.svc h3{font-size:1.25rem;font-weight:700}
.svc p{color:var(--ink-2);font-size:.98rem}
.svc-code{font-size:.75rem;color:var(--copper-d);letter-spacing:.08em}
.svc-feature{grid-column:1 / span 2;grid-row:1 / span 2;padding:0;overflow:hidden}
.svc-feature img{flex:1;min-height:260px;height:0;object-fit:cover;width:100%}
.svc-accent{grid-column:span 2}
.svc-body{padding:1.75rem;display:flex;flex-direction:column;gap:.75rem}
.svc-feature h3{font-size:1.6rem}
.svc-accent{background:var(--navy);border-color:var(--navy);color:var(--on-dark)}
.svc-accent p{color:var(--on-dark-2)}
.svc-accent .svc-code{color:var(--copper)}
.text-link{color:var(--copper);font-weight:600;text-decoration:none;margin-top:auto}
.text-link:hover{text-decoration:underline}

.support{margin-top:2.5rem;border-top:1px solid var(--line);padding-top:2rem;display:grid;grid-template-columns:200px 1fr;gap:2rem}
.support-title{font-size:.8rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-3);font-weight:500;margin-top:.2rem}
.support-list{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(2,1fr);gap:1.25rem 2.5rem}
.support-list li{display:flex;flex-direction:column;gap:.15rem;color:var(--ink-2);font-size:.95rem;padding-left:1rem;border-left:2px solid var(--copper)}
.support-list b{color:var(--ink);font-weight:600;font-size:1rem}

/* platforms */
.section-dark{background:var(--navy);color:var(--on-dark)}
.section-dark h2{color:#fff}
.section-dark .section-sub{color:var(--on-dark-2)}
.section-dark .eyebrow{color:var(--copper)}
.pt{border-top:1px solid rgba(255,255,255,.14)}
.pt-row{display:grid;grid-template-columns:260px 1fr;gap:1.5rem;padding:1.15rem 0;border-bottom:1px solid rgba(255,255,255,.1);align-items:center;transition:background .15s}
.pt-row:not(.pt-headrow):hover{background:rgba(255,255,255,.03)}
.pt-headrow{font-family:var(--mono);font-size:.75rem;text-transform:uppercase;letter-spacing:.08em;color:var(--on-dark-2);padding:.75rem 0}
.pt-brand{font-family:var(--display);font-weight:700;font-size:1.15rem;color:#fff}
.pt-items{display:flex;flex-wrap:wrap;gap:.5rem}
.tag{font-style:normal;font-family:var(--mono);font-size:.85rem;padding:.3rem .7rem;border-radius:4px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);color:var(--on-dark)}
.tag.legacy{border-color:rgba(198,136,77,.6);color:#E9BE92;background:rgba(198,136,77,.1)}
.pt-legend{margin-top:1.25rem;font-size:.82rem;color:var(--on-dark-2);display:flex;align-items:center;gap:.5rem;flex-wrap:wrap}

/* health check */
.hc-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:clamp(2rem,6vw,5rem);align-items:start}
.hc-grid .btn{margin-top:2rem}
.checklist{list-style:none;margin:0;padding:0;background:var(--surface);border:1px solid var(--line);border-radius:10px}
.checklist li{display:flex;gap:1.25rem;padding:1.35rem 1.5rem;border-bottom:1px solid var(--line)}
.checklist li:last-child{border-bottom:0}
.ck-n{color:var(--copper-d);font-size:.85rem;padding-top:.15rem}
.checklist div{display:flex;flex-direction:column;gap:.15rem;color:var(--ink-2);font-size:.95rem}
.checklist b{color:var(--ink);font-size:1.05rem;font-weight:600}

/* why */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:2.5rem}
.why{border-top:2px solid var(--ink);padding-top:1.25rem}
.why h3{font-size:1.3rem;margin-bottom:.6rem}
.why p{color:var(--ink-2)}
.banner{position:relative;margin:clamp(3rem,6vw,4.5rem) 0 0;border-radius:12px;overflow:hidden}
.banner img{width:100%;aspect-ratio:21/8;object-fit:cover;object-position:50% 65%}
.banner::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(22,38,45,.92) 0%,rgba(22,38,45,.7) 45%,rgba(22,38,45,0) 80%)}
.banner figcaption{position:absolute;inset:0;z-index:1;padding:clamp(1.5rem,4vw,3rem);display:flex;flex-direction:column;justify-content:center;color:#fff}
.clients{list-style:none;margin:0;padding:0;display:grid;gap:.4rem;font-family:var(--display);font-weight:600;font-size:clamp(1.05rem,.9rem + .6vw,1.4rem)}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:clamp(2rem,6vw,5rem);align-items:start}
.info{margin:2.25rem 0 0;display:grid;grid-template-columns:auto 1fr;gap:1rem 1.5rem}
.info dt{font-size:.78rem;text-transform:uppercase;letter-spacing:.08em;color:var(--ink-3);padding-top:.2rem}
.info dd{margin:0;font-weight:500}
.info a{color:var(--copper-d);text-decoration:none}
.info a:hover{text-decoration:underline}
.form{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:clamp(1.25rem,3vw,2rem);display:grid;gap:1.1rem}
.field{display:grid;gap:.4rem}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:1rem}
.field label{font-size:.9rem;font-weight:600}
.field input,.field select,.field textarea{font:inherit;font-size:1rem;padding:.75rem .9rem;border:1px solid #CFC5B7;border-radius:var(--r);background:var(--bg);color:var(--ink);width:100%}
.field textarea{resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:none;border-color:var(--copper-d);box-shadow:0 0 0 3px rgba(198,136,77,.2)}
.field .invalid{border-color:#B3261E}
.form-note{font-size:.88rem;color:var(--ink-2);min-height:1.2em}

/* footer */
.site-footer{border-top:1px solid var(--line);padding:2rem 0;background:var(--bg)}
.footer-inner{display:flex;align-items:center;gap:1.5rem;flex-wrap:wrap;font-size:.88rem;color:var(--ink-3)}
.footer-logo{height:36px;width:auto}
.footer-inner p{margin-left:auto}
.footer-inner a{text-decoration:none;font-size:.8rem}
.footer-inner a:hover{color:var(--copper-d)}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* responsive */
@media (max-width:1000px){
  .nav{display:none}
  .header-actions{margin-left:auto}
  .hero-grid,.hc-grid,.contact-grid{grid-template-columns:1fr}
  .svc-grid{grid-template-columns:1fr 1fr}
  .svc-feature{grid-column:1 / -1;grid-row:auto}
  .svc-feature img{height:auto;flex:none;aspect-ratio:16/9}
  .svc-accent{grid-column:auto}
  .support{grid-template-columns:1fr;gap:1rem}
  .pt-row{grid-template-columns:200px 1fr}
}
@media (max-width:640px){
  .hide-sm{display:none}
  .brand img{height:36px}
  .header-inner{height:64px}
  .svc-grid,.why-grid,.support-list,.field-row{grid-template-columns:1fr}
  .svc-feature{grid-column:auto}
  .svc-accent{grid-column:auto}
  .why-grid{gap:1.75rem}
  .pt-row{grid-template-columns:1fr;gap:.6rem}
  .pt-headrow{display:none}
  .banner img{aspect-ratio:4/5}
  .banner::after{background:linear-gradient(0deg,rgba(22,38,45,.95) 0%,rgba(22,38,45,.6) 55%,rgba(22,38,45,.1) 100%)}
  .banner figcaption{justify-content:flex-end}
  .readout{position:static;margin-top:.75rem;min-width:0}
  .footer-inner p{margin-left:0}
}