/* ============================================================
   CITYBIZ — Corporate Services, Hong Kong
   Design system: ink / paper / harbour blue (#0079C0)
   Type: Archivo (variable width) + IBM Plex Mono (labels)
   ============================================================ */

:root{
  --ink:#0E1116;
  --ink-soft:#3A4450;
  --paper:#F7F9FB;
  --white:#FFFFFF;
  --blue:#0079C0;
  --blue-deep:#005E96;
  --sky:#E4F0F8;
  --navy:#0B1D2A;
  --line:#D9E1E8;
  --line-dark:rgba(255,255,255,.14);
  --max:1240px;
  --pad:clamp(20px, 5vw, 64px);
  --r:2px;
  --ease:cubic-bezier(.22,.8,.24,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Archivo',system-ui,sans-serif;
  font-variation-settings:'wdth' 100;
  background:var(--paper);
  color:var(--ink);
  line-height:1.6;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
::selection{background:var(--blue);color:#fff}

.mono{
  font-family:'IBM Plex Mono',monospace;
  font-size:.72rem;
  letter-spacing:.18em;
  text-transform:uppercase;
}

:focus-visible{outline:2px solid var(--blue);outline-offset:3px}

/* ---------- wrap ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding-inline:var(--pad)}

/* ---------- header ---------- */
.site-header{
  position:fixed;inset:0 0 auto 0;z-index:100;
  background:rgba(247,249,251,.86);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  transition:transform .4s var(--ease);
}
.site-header.hidden{transform:translateY(-100%)}
.header-inner{
  max-width:var(--max);margin:0 auto;padding:0 var(--pad);
  display:flex;align-items:center;justify-content:space-between;
  height:72px;
}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:34px;width:auto}
.brand-word{font-weight:800;font-size:1.05rem;letter-spacing:.06em}
.brand-word small{display:block;font-weight:500;font-size:.55rem;letter-spacing:.32em;color:var(--ink-soft)}

.nav{display:flex;align-items:center;gap:6px}
.nav a{
  padding:8px 14px;font-size:.82rem;font-weight:600;letter-spacing:.03em;
  border-radius:var(--r);position:relative;transition:color .2s;
}
.nav a::after{
  content:'';position:absolute;left:14px;right:14px;bottom:4px;height:2px;
  background:var(--blue);transform:scaleX(0);transform-origin:left;
  transition:transform .3s var(--ease);
}
.nav a:hover::after,.nav a[aria-current="page"]::after{transform:scaleX(1)}
.nav a[aria-current="page"]{color:var(--blue)}
.nav .cta{
  margin-left:14px;background:var(--ink);color:#fff;padding:10px 20px;
  transition:background .25s;
}
.nav .cta::after{display:none}
.nav .cta:hover{background:var(--blue)}

.burger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0;transition:.3s var(--ease)}
.burger[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger[aria-expanded="true"] span:nth-child(2){opacity:0}
.burger[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

@media (max-width:900px){
  .burger{display:block}
  .nav{
    position:fixed;top:72px;right:0;bottom:0;width:min(320px,84vw);
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--white);border-left:1px solid var(--line);
    padding:24px;transform:translateX(100%);transition:transform .35s var(--ease);
  }
  .nav.open{transform:translateX(0)}
  .nav a{padding:16px 8px;border-bottom:1px solid var(--line);font-size:1rem}
  .nav .cta{margin:20px 0 0;text-align:center}
}

/* ---------- vertical side rail (signature wayfinding) ---------- */
.rail{
  position:fixed;left:18px;top:50%;transform:translateY(-50%);z-index:60;
  display:flex;flex-direction:column;align-items:center;gap:14px;
  pointer-events:none;
}
.rail .rail-line{width:1px;height:70px;background:var(--line)}
.rail .rail-text{
  writing-mode:vertical-rl;font-family:'IBM Plex Mono',monospace;
  font-size:.6rem;letter-spacing:.35em;text-transform:uppercase;color:var(--ink-soft);
}
@media (max-width:1360px){.rail{display:none}}

/* ---------- hero ---------- */
.hero{
  position:relative;
  padding:calc(72px + clamp(56px,10vh,120px)) 0 0;
  background:
    linear-gradient(var(--paper) 0%, var(--white) 100%);
  overflow:hidden;
}
.hero-grid-bg{
  position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size:calc(100%/12) 120px;
  opacity:.35;
  mask-image:linear-gradient(to bottom, transparent, #000 12%, #000 70%, transparent);
  -webkit-mask-image:linear-gradient(to bottom, transparent, #000 12%, #000 70%, transparent);
}
.hero-inner{position:relative;max-width:var(--max);margin:0 auto;padding-inline:var(--pad)}
.hero-eyebrow{
  display:inline-flex;align-items:center;gap:10px;color:var(--blue-deep);
  margin-bottom:28px;
}
.hero-eyebrow::before{content:'';width:34px;height:1px;background:var(--blue)}
h1.display{
  font-weight:800;
  font-variation-settings:'wdth' 118;
  font-size:clamp(2.7rem, 8.2vw, 6.4rem);
  line-height:.98;letter-spacing:-.015em;
  text-transform:uppercase;
}
h1.display .line{display:block;overflow:hidden}
h1.display .line > span{display:inline-block;transform:translateY(110%);animation:riseUp .9s var(--ease) forwards}
h1.display .line:nth-child(2) > span{animation-delay:.12s}
h1.display .line:nth-child(3) > span{animation-delay:.24s}
h1.display .accent{color:var(--blue)}
@keyframes riseUp{to{transform:translateY(0)}}

.hero-sub{
  max-width:560px;margin-top:28px;font-size:1.06rem;color:var(--ink-soft);
  opacity:0;animation:fadeIn .8s .5s var(--ease) forwards;
}
@keyframes fadeIn{to{opacity:1}}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:36px;opacity:0;animation:fadeIn .8s .65s var(--ease) forwards}

.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:15px 28px;font-weight:700;font-size:.88rem;letter-spacing:.04em;
  border-radius:var(--r);border:1px solid var(--ink);
  transition:all .25s var(--ease);cursor:pointer;
}
.btn svg{transition:transform .25s var(--ease)}
.btn:hover svg{transform:translate(3px,-3px)}
.btn-solid{background:var(--ink);color:#fff}
.btn-solid:hover{background:var(--blue);border-color:var(--blue)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{border-color:var(--blue);color:var(--blue)}
.btn-blue{background:var(--blue);border-color:var(--blue);color:#fff}
.btn-blue:hover{background:var(--blue-deep);border-color:var(--blue-deep)}

/* skyline strip under hero */
.skyline{position:relative;margin-top:clamp(40px,8vh,90px)}
.skyline svg{display:block;width:100%;height:auto}
.skyline .flightpath{
  fill:none;stroke:var(--blue);stroke-width:2;
  stroke-dasharray:1400;stroke-dashoffset:1400;
  animation:draw 2.6s .8s var(--ease) forwards;
}
.skyline .plane{opacity:0;animation:fadeIn .4s 3s forwards}
@keyframes draw{to{stroke-dashoffset:0}}

/* ---------- ticker ---------- */
.ticker{
  background:var(--ink);color:#fff;overflow:hidden;white-space:nowrap;
  border-block:1px solid var(--ink);
}
.ticker-track{display:inline-flex;animation:ticker 26s linear infinite;padding-block:13px}
.ticker span{
  font-family:'IBM Plex Mono',monospace;font-size:.72rem;letter-spacing:.22em;
  text-transform:uppercase;padding:0 28px;position:relative;
}
.ticker span::after{content:'▸';position:absolute;right:-7px;color:var(--blue)}
@keyframes ticker{to{transform:translateX(-50%)}}
@media (prefers-reduced-motion:reduce){
  .ticker-track{animation:none}
  h1.display .line > span{animation:none;transform:none}
  .hero-sub,.hero-actions,.skyline .plane{animation:none;opacity:1}
  .skyline .flightpath{animation:none;stroke-dashoffset:0}
  .reveal{opacity:1 !important;transform:none !important}
}

/* ---------- sections ---------- */
.section{padding:clamp(64px,10vh,120px) 0;position:relative}
.section.tint{background:var(--white);border-block:1px solid var(--line)}
.section-head{display:grid;grid-template-columns:auto 1fr;gap:24px;align-items:end;margin-bottom:clamp(36px,6vh,64px)}
.kicker{color:var(--blue-deep);display:flex;align-items:center;gap:10px}
.kicker::before{content:'';width:26px;height:1px;background:var(--blue)}
h2.title{
  font-weight:800;font-variation-settings:'wdth' 114;
  font-size:clamp(1.9rem,4.4vw,3.2rem);line-height:1.04;
  text-transform:uppercase;letter-spacing:-.01em;margin-top:12px;
}
.section-head .head-note{justify-self:end;max-width:340px;color:var(--ink-soft);font-size:.95rem;padding-bottom:6px}
@media (max-width:760px){.section-head{grid-template-columns:1fr}.section-head .head-note{justify-self:start}}

/* reveal on scroll */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- expertise rows (home) ---------- */
.svc-rows{border-top:1px solid var(--line)}
.svc-row{
  display:grid;grid-template-columns:110px 1.1fr 1.6fr auto;gap:28px;align-items:center;
  padding:34px 0;border-bottom:1px solid var(--line);
  transition:background .3s;position:relative;
}
.svc-row:hover{background:var(--sky)}
.svc-index{
  font-weight:800;font-variation-settings:'wdth' 125;
  font-size:2.6rem;color:transparent;
  -webkit-text-stroke:1.3px var(--ink);
  transition:.3s;line-height:1;
}
.svc-row:hover .svc-index{color:var(--blue);-webkit-text-stroke:1.3px var(--blue)}
.svc-name{font-weight:800;font-size:1.25rem;text-transform:uppercase;letter-spacing:.01em;line-height:1.2}
.svc-name .mono{display:block;color:var(--blue-deep);margin-top:6px;letter-spacing:.14em}
.svc-desc{color:var(--ink-soft);font-size:.95rem;max-width:560px}
.svc-arrow{
  width:48px;height:48px;border:1px solid var(--line);border-radius:50%;
  display:grid;place-items:center;transition:.3s var(--ease);flex-shrink:0;
}
.svc-row:hover .svc-arrow{background:var(--blue);border-color:var(--blue);transform:rotate(45deg)}
.svc-row:hover .svc-arrow svg path{stroke:#fff}
@media (max-width:900px){
  .svc-row{grid-template-columns:64px 1fr;grid-template-areas:'i n' 'i d' 'i a'}
  .svc-index{font-size:1.8rem;grid-area:i}
  .svc-name{grid-area:n}.svc-desc{grid-area:d}.svc-arrow{grid-area:a;margin-top:8px}
}

/* ---------- stats ---------- */
.stats{background:var(--navy);color:#fff;position:relative;overflow:hidden}
.stats::before{
  content:'';position:absolute;inset:0;
  background-image:
    linear-gradient(to right, var(--line-dark) 1px, transparent 1px);
  background-size:calc(100%/6) 100%;
  pointer-events:none;
}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);position:relative}
.stat{padding:clamp(44px,7vh,80px) 32px;border-right:1px solid var(--line-dark);text-align:left}
.stat:last-child{border-right:0}
.stat-num{
  font-weight:800;font-variation-settings:'wdth' 120;
  font-size:clamp(2.6rem,6vw,4.6rem);line-height:1;color:#fff;
}
.stat-num .accent{color:var(--blue)}
.stat-label{margin-top:14px;color:rgba(255,255,255,.66)}
@media (max-width:700px){
  .stats-grid{grid-template-columns:1fr}
  .stat{border-right:0;border-bottom:1px solid var(--line-dark);padding:36px var(--pad)}
  .stat:last-child{border-bottom:0}
}

/* ---------- edge cards ---------- */
.edge-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.edge{
  background:var(--white);padding:clamp(28px,4vw,48px);position:relative;overflow:hidden;
  transition:.3s;
}
.edge::after{
  content:'';position:absolute;left:0;top:0;width:4px;height:0;background:var(--blue);
  transition:height .4s var(--ease);
}
.edge:hover::after{height:100%}
.edge:hover{background:var(--sky)}
.edge .mono{color:var(--blue-deep)}
.edge h3{font-weight:800;font-size:1.2rem;text-transform:uppercase;margin:14px 0 10px;letter-spacing:.01em}
.edge p{color:var(--ink-soft);font-size:.95rem}
@media (max-width:760px){.edge-grid{grid-template-columns:1fr}}

/* ---------- generic detail cards (service pages) ---------- */
.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.detail{background:var(--white);padding:clamp(28px,4vw,52px);transition:.3s;position:relative}
.detail:hover{background:var(--sky)}
.detail .d-glyph{
  width:52px;height:52px;border:1px solid var(--ink);border-radius:50%;
  display:grid;place-items:center;margin-bottom:22px;transition:.3s var(--ease);
}
.detail:hover .d-glyph{background:var(--blue);border-color:var(--blue)}
.detail:hover .d-glyph svg *{stroke:#fff}
.detail h3{font-weight:800;font-size:1.28rem;text-transform:uppercase;letter-spacing:.01em;margin-bottom:12px}
.detail p{color:var(--ink-soft);font-size:.96rem}
@media (max-width:760px){.detail-grid{grid-template-columns:1fr}}

/* ---------- process timeline (insurance) ---------- */
.process{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border-inline:1px solid var(--line)}
.step{padding:36px 28px;border-right:1px solid var(--line);position:relative}
.step:first-child{border-left:0}
.step-num{
  font-weight:800;font-variation-settings:'wdth' 125;font-size:3rem;line-height:1;
  color:transparent;-webkit-text-stroke:1.3px var(--blue);
}
.step h3{font-weight:800;font-size:1.05rem;text-transform:uppercase;margin:18px 0 10px}
.step p{color:var(--ink-soft);font-size:.9rem}
.step::after{
  content:'▸';position:absolute;right:-8px;top:44px;color:var(--blue);
  background:var(--paper);font-size:1rem;line-height:1;z-index:2;
}
.section.tint .step::after{background:var(--white)}
.step:last-child::after{display:none}
@media (max-width:960px){
  .process{grid-template-columns:1fr 1fr}
  .step:nth-child(2)::after{display:none}
}
@media (max-width:600px){
  .process{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line)}
  .step::after{display:none}
}

/* ---------- page hero (interior) ---------- */
.page-hero{
  position:relative;padding:calc(72px + clamp(48px,9vh,100px)) 0 clamp(48px,8vh,90px);
  background:var(--navy);color:#fff;overflow:hidden;
}
.page-hero .hero-grid-bg{
  background-image:
    linear-gradient(to right, var(--line-dark) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-dark) 1px, transparent 1px);
  opacity:.5;
}
.page-hero .crumb{color:rgba(255,255,255,.55);display:flex;gap:10px;align-items:center;margin-bottom:26px}
.page-hero .crumb a:hover{color:#fff}
.page-hero .crumb b{color:var(--blue);font-weight:400}
.page-hero h1{
  font-weight:800;font-variation-settings:'wdth' 118;
  font-size:clamp(2.4rem,6.4vw,4.8rem);line-height:1;letter-spacing:-.012em;
  text-transform:uppercase;max-width:900px;
}
.page-hero h1 .accent{color:var(--blue)}
.page-hero .lede{max-width:640px;margin-top:26px;color:rgba(255,255,255,.75);font-size:1.04rem}
.page-hero .cred{
  display:inline-flex;align-items:center;gap:10px;margin-top:26px;
  border:1px solid var(--line-dark);padding:10px 18px;color:rgba(255,255,255,.8);
}
.page-hero .cred::before{content:'';width:8px;height:8px;background:var(--blue);border-radius:50%}
.page-hero .hero-actions{opacity:1;animation:none}

/* ---------- split feature ---------- */
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,5vw,72px);align-items:center}
.split .split-media{
  border:1px solid var(--line);background:var(--white);padding:clamp(24px,3vw,44px);
}
.split h3{font-weight:800;font-size:1.5rem;text-transform:uppercase;margin:14px 0 12px}
.split p{color:var(--ink-soft)}
.split ul{list-style:none;margin-top:18px}
.split li{
  padding:12px 0 12px 30px;border-bottom:1px solid var(--line);position:relative;
  color:var(--ink-soft);font-size:.95rem;
}
.split li::before{content:'▸';position:absolute;left:4px;color:var(--blue)}
@media (max-width:860px){.split{grid-template-columns:1fr}}

/* ---------- CTA band ---------- */
.cta-band{
  background:var(--blue);color:#fff;position:relative;overflow:hidden;
}
.cta-band::before{
  content:'CB';position:absolute;right:-40px;bottom:-90px;
  font-weight:800;font-variation-settings:'wdth' 125;font-size:26rem;line-height:1;
  color:rgba(255,255,255,.07);pointer-events:none;
}
.cta-inner{
  max-width:var(--max);margin:0 auto;padding:clamp(56px,10vh,110px) var(--pad);
  display:grid;grid-template-columns:1.5fr auto;gap:32px;align-items:center;position:relative;
}
.cta-inner h2{
  font-weight:800;font-variation-settings:'wdth' 115;
  font-size:clamp(1.9rem,4.6vw,3.4rem);line-height:1.05;text-transform:uppercase;
}
.cta-inner .btn{border-color:#fff;background:#fff;color:var(--ink)}
.cta-inner .btn:hover{background:var(--ink);border-color:var(--ink);color:#fff}
@media (max-width:760px){.cta-inner{grid-template-columns:1fr}}

/* ---------- contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.contact-cell{background:var(--white);padding:clamp(28px,4vw,48px)}
.contact-cell h3{font-weight:800;text-transform:uppercase;font-size:1.1rem;margin-bottom:16px}
.contact-cell a.big{
  display:block;font-weight:700;font-size:clamp(1.05rem,2.4vw,1.5rem);
  margin-top:6px;transition:color .2s;word-break:break-all;
}
.contact-cell a.big:hover{color:var(--blue)}
.contact-cell p{color:var(--ink-soft);font-size:.95rem}
@media (max-width:760px){.contact-grid{grid-template-columns:1fr}}

/* ---------- footer ---------- */
.site-footer{background:var(--navy);color:#fff}
.footer-top{
  max-width:var(--max);margin:0 auto;padding:clamp(48px,8vh,80px) var(--pad);
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:40px;
}
.footer-top img{height:44px;width:auto;margin-bottom:18px}
.footer-top p{color:rgba(255,255,255,.6);font-size:.9rem;max-width:300px}
.f-col h4{font-family:'IBM Plex Mono',monospace;font-size:.68rem;letter-spacing:.26em;text-transform:uppercase;color:var(--blue);margin-bottom:18px}
.f-col a{display:block;padding:7px 0;color:rgba(255,255,255,.72);font-size:.92rem;transition:.2s}
.f-col a:hover{color:#fff;padding-left:6px}
.f-col span{display:block;padding:7px 0;color:rgba(255,255,255,.72);font-size:.92rem}
.footer-bottom{
  border-top:1px solid var(--line-dark);
}
.footer-bottom-inner{
  max-width:var(--max);margin:0 auto;padding:22px var(--pad);
  display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center;
  color:rgba(255,255,255,.5);font-size:.8rem;
}
.footer-bottom-inner a:hover{color:#fff}
@media (max-width:900px){.footer-top{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.footer-top{grid-template-columns:1fr}}

/* ---------- misc ---------- */
.tag-cloud{display:flex;flex-wrap:wrap;gap:10px;margin-top:20px}
.tag{
  border:1px solid var(--line);padding:9px 16px;font-size:.82rem;font-weight:600;
  background:var(--white);transition:.25s;
}
.tag:hover{border-color:var(--blue);color:var(--blue)}

/* ---------- CityTech division hero video ---------- */
.ct-hero{position:relative}
.ct-video-frame{
  position:relative;
  border:1px solid var(--line-dark);
  background:#fff;
  overflow:hidden;
  transform:translateY(1px); /* sit flush on hero bottom edge */
}
.ct-video-frame video{display:block;width:100%;height:auto;max-height:64vh;object-fit:cover;background:#fff}
.ct-replay{
  position:absolute;right:14px;bottom:14px;
  background:rgba(14,17,22,.85);color:#fff;border:1px solid rgba(255,255,255,.2);
  padding:9px 16px;cursor:pointer;opacity:0;pointer-events:none;
  transition:opacity .3s var(--ease);
}
.ct-replay.show{opacity:1;pointer-events:auto}
.ct-replay:hover{background:var(--blue)}
@media (max-width:960px){.process[style*="repeat(3"]{grid-template-columns:1fr !important}}