/* ===== K Service HK · Design System ===== */
:root{
  --navy-900:#060d1f; --navy-800:#0b1b33; --navy-700:#12264a;
  --blue:#1b6df3; --cyan:#22d3ee; --grad:linear-gradient(135deg,#1b6df3,#22d3ee);
  --ink:#0b1b33; --muted:#5a6b85; --line:#e3eaf4; --bg:#ffffff; --bg-soft:#f4f8fd;
  --radius:16px; --shadow:0 12px 40px rgba(11,27,51,.10);
  --font:'Segoe UI',-apple-system,BlinkMacSystemFont,'PingFang HK','Microsoft JhengHei',Roboto,Helvetica,Arial,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{width:min(1140px,92%);margin:0 auto}
.section{padding:88px 0}
.section.soft{background:var(--bg-soft)}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:.82rem;letter-spacing:.14em;text-transform:uppercase;color:var(--blue)}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--grad);border-radius:2px}
h1,h2,h3{line-height:1.25;font-weight:800}
h1{font-size:clamp(2.1rem,4.6vw,3.4rem);letter-spacing:-.02em}
h2{font-size:clamp(1.6rem,3vw,2.3rem);letter-spacing:-.015em}
.lead{font-size:1.08rem;color:var(--muted);max-width:64ch;margin-top:14px}
.center{text-align:center}
.center .lead{margin-inline:auto}
.grid{display:grid;gap:26px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:960px){.g4{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(2,1fr)}}
@media(max-width:640px){.g2,.g3,.g4{grid-template-columns:1fr}.section{padding:64px 0}}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;padding:13px 26px;border-radius:999px;transition:.25s;border:2px solid transparent;cursor:pointer;font-family:inherit;font-size:.98rem}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 22px rgba(27,109,243,.35)}
.btn-grad:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(27,109,243,.45)}
.btn-ghost{border-color:rgba(255,255,255,.55);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-outline{border-color:#c9d6e8;color:var(--ink)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}

/* Header */
.header{position:sticky;top:0;z-index:50;background:rgba(6,13,31,.92);backdrop-filter:blur(10px);border-bottom:1px solid rgba(255,255,255,.08)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{height:38px;width:auto;border-radius:8px}
.brand .brand-name{color:#fff;font-weight:800;letter-spacing:.02em}
.brand .brand-name small{display:block;font-weight:600;font-size:.62rem;letter-spacing:.28em;color:var(--cyan);text-transform:uppercase}
.menu{display:flex;align-items:center;gap:30px;list-style:none}
.menu a{color:#c7d3e6;font-weight:600;font-size:.96rem;transition:.2s}
.menu a:hover,.menu a.active{color:#fff}
.menu a.active{position:relative}
.menu a.active::after{content:"";position:absolute;left:0;right:0;bottom:-8px;height:2px;background:var(--grad);border-radius:2px}
.lang{display:inline-flex;gap:4px;padding:4px;background:rgba(255,255,255,.08);border-radius:999px}
.lang a{padding:4px 12px;border-radius:999px;font-size:.8rem;font-weight:700;color:#c7d3e6}
.lang a.on{background:var(--grad);color:#fff}
.burger{display:none;background:none;border:0;color:#fff;font-size:1.6rem;cursor:pointer}
@media(max-width:880px){
  .menu{position:fixed;inset:72px 0 auto;flex-direction:column;gap:6px;background:var(--navy-800);padding:20px;display:none;border-bottom:1px solid rgba(255,255,255,.1)}
  .menu.open{display:flex}
  .menu li{width:100%}
  .menu a{display:block;padding:12px}
  .burger{display:block}
}

/* Hero */
.hero{position:relative;color:#fff;background:
  radial-gradient(900px 480px at 85% -10%,rgba(34,211,238,.28),transparent 60%),
  radial-gradient(760px 460px at -5% 15%,rgba(27,109,243,.35),transparent 55%),var(--navy-900);
  overflow:hidden;padding:120px 0}
.hero.inner{padding:84px 0}
.hero::after{content:"";position:absolute;inset:auto -10% -42% 40%;height:120%;background:radial-gradient(600px 300px at center,rgba(34,211,238,.16),transparent 70%);pointer-events:none}
.hero .container{position:relative;z-index:1}
.hero h1 span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{color:#b9c7dc}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:34px}
.hero-badges{display:flex;flex-wrap:wrap;gap:10px;margin-top:38px}
.hero-badges span{font-size:.82rem;font-weight:600;padding:7px 15px;border:1px solid rgba(255,255,255,.18);border-radius:999px;background:rgba(255,255,255,.05)}
@media(max-width:880px){.hero{padding:76px 0}}

/* Cards */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px;transition:.25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow);border-color:transparent}
.card .ico{width:54px;height:54px;border-radius:14px;background:rgba(27,109,243,.1);display:flex;align-items:center;justify-content:center;margin-bottom:18px;font-size:1.5rem}
.card h3{font-size:1.14rem;margin-bottom:10px}
.card p{color:var(--muted);font-size:.95rem}
.icon-blue{background:linear-gradient(135deg,rgba(27,109,243,.14),rgba(34,211,238,.16))!important}

/* Stats */
.stats{background:var(--grad);color:#fff;border-radius:22px;padding:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.stat b{display:block;font-size:2.2rem;line-height:1.1}
.stat span{font-size:.9rem;opacity:.9}
@media(max-width:900px){.stats{grid-template-columns:repeat(2,1fr)}}
@media(max-width:520px){.stats{grid-template-columns:1fr 1fr;padding:30px 18px}}

/* Feature split */
.split{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.split.rev .split-visual{order:-1}
@media(max-width:900px){.split{grid-template-columns:1fr;gap:34px}.split.rev .split-visual{order:0}}
.check{list-style:none;margin-top:22px;display:grid;gap:12px}
.check li{display:flex;gap:11px;align-items:flex-start;font-weight:600}
.check li::before{content:"✓";flex:none;width:22px;height:22px;border-radius:50%;background:var(--grad);color:#fff;font-size:.8rem;display:inline-flex;align-items:center;justify-content:center;margin-top:3px}
.split-visual{position:relative;background:var(--navy-900);border-radius:22px;padding:40px;color:#fff;min-height:300px;display:flex;flex-direction:column;justify-content:center;gap:16px;overflow:hidden}
.split-visual::before{content:"";position:absolute;top:-40%;right:-20%;width:70%;height:120%;background:radial-gradient(closest-side,rgba(34,211,238,.30),transparent);pointer-events:none}
.vis-tag{display:inline-flex;align-self:flex-start;padding:6px 14px;border-radius:999px;font-size:.78rem;font-weight:700;background:rgba(34,211,238,.15);color:var(--cyan)}
.vis-line{height:9px;border-radius:6px;background:rgba(255,255,255,.12)}
.vis-line.l{width:100%}.vis-line.m{width:72%}.vis-line.s{width:52%}
.vis-line.grad{background:var(--grad)}

/* Steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px}
.step::before{counter-increment:step;content:"0" counter(step);font-weight:800;font-size:1.05rem;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.step h3{font-size:1.02rem;margin:12px 0 8px}
.step p{color:var(--muted);font-size:.9rem}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.steps{grid-template-columns:1fr}}

/* Table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius);background:#fff}
table{width:100%;border-collapse:collapse;min-width:720px}
th,td{padding:17px 20px;text-align:left;font-size:.95rem}
thead th{background:var(--bg-soft);font-weight:800;white-space:nowrap}
tbody tr{border-top:1px solid var(--line)}
td b{font-weight:800}
.pill{display:inline-block;padding:3px 12px;border-radius:999px;font-size:.78rem;font-weight:700;background:rgba(34,211,238,.14);color:#0b7fa8}

/* CTA band */
.cta{background:var(--grad);color:#fff;text-align:center;border-radius:24px;padding:64px 30px}
.cta h2{max-width:24ch;margin:0 auto}
.cta p{opacity:.92;margin:14px auto 28px;max-width:60ch}
.cta .btn{background:#fff;color:var(--blue)}
.cta .btn:hover{box-shadow:0 10px 26px rgba(0,0,0,.18)}

/* About values */
.value{text-align:center;padding:34px 24px}
.value .ico{margin-inline:auto}

/* Contact */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:44px}
.contact-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;text-align:center}
.contact-item .ico{margin-inline:auto;margin-bottom:14px}
.contact-item h3{font-size:1rem;margin-bottom:8px}
.contact-item p{color:var(--muted);font-size:.9rem;word-break:break-word}
@media(max-width:800px){.contact-grid{grid-template-columns:1fr}}
form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;max-width:760px;margin:0 auto;display:grid;gap:18px}
.field{display:grid;gap:7px}
.field label{font-weight:700;font-size:.9rem}
.field input,.field textarea,.field select{padding:13px 15px;border:1px solid #cfdae9;border-radius:12px;font-family:inherit;font-size:.96rem;width:100%;transition:.2s;background:#fff;color:var(--ink)}
.field input:focus,.field textarea:focus,.field select:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 3px rgba(27,109,243,.14)}
.f2{grid-template-columns:1fr 1fr}
@media(max-width:640px){.f2{grid-template-columns:1fr}}

/* Footer */
.footer{background:var(--navy-900);color:#93a4bd;padding:64px 0 30px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:40px;margin-bottom:44px}
.footer .brand-name{color:#fff;font-weight:800}
.footer h4{color:#fff;font-size:.98rem;margin-bottom:16px}
.footer ul{list-style:none;display:grid;gap:9px;font-size:.92rem}
.footer ul a:hover{color:var(--cyan)}
.footer small{opacity:.75}
.copy{border-top:1px solid rgba(255,255,255,.09);padding-top:24px;display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;font-size:.85rem}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr}}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* Reveal */
.reveal{opacity:0;transform:translateY(18px);transition:.7s ease}
.reveal.in{opacity:1;transform:none}