/* ============================================================
   Costam Global — www.hkcostam.com
   Shared stylesheet
   ============================================================ */
:root{
  --navy:#0a2540;
  --deep:#061a33;
  --blue:#1a6ee0;
  --blue-soft:#e8f1fd;
  --green:#7ac143;
  --red:#f04e30;
  --ink:#152a3e;
  --muted:#5b7185;
  --line:#e3eaf2;
  --bg:#f7f9fc;
  --white:#ffffff;
  --radius:16px;
  --shadow:0 10px 30px rgba(10,37,64,.08);
  --shadow-lg:0 24px 60px rgba(10,37,64,.14);
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  color:var(--ink);background:var(--white);
  line-height:1.75;font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* ---------- language toggle ---------- */
html.lang-en .zh{display:none!important}
html:not(.lang-en) .en{display:none!important}

/* ---------- layout ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
section{padding:88px 0}
section.tight{padding:64px 0}
.section-head{max-width:720px;margin-bottom:48px}
.overline{
  display:inline-flex;align-items:center;gap:8px;
  font-size:13px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:var(--blue);margin-bottom:14px;
}
.overline::before{content:"";width:26px;height:2px;background:var(--blue);border-radius:2px}
h1,h2,h3{line-height:1.3;font-weight:700;color:var(--navy)}
h2{font-size:clamp(26px,3.4vw,38px);margin-bottom:16px}
h3{font-size:20px}
.lead{color:var(--muted);font-size:17px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:74px}
.brand{display:flex;align-items:center;gap:12px}
.brand svg{width:42px;height:42px}
.brand-name{font-size:20px;font-weight:800;letter-spacing:.02em;color:var(--navy)}
.brand-name small{display:block;font-size:10.5px;font-weight:500;letter-spacing:.14em;color:var(--muted)}
.nav-links{display:flex;align-items:center;gap:34px;font-size:15px;font-weight:500}
.nav-links a{color:var(--ink);padding:6px 0;position:relative;white-space:nowrap}
.nav-links a::after{
  content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;
  background:var(--blue);border-radius:2px;transition:width .25s;
}
.nav-links a:hover::after,.nav-links a.active::after{width:100%}
.nav-links a.active{color:var(--blue)}
.nav-right{display:flex;align-items:center;gap:16px}
.lang-btn{
  border:1.5px solid var(--navy);background:transparent;color:var(--navy);
  font:inherit;font-size:13.5px;font-weight:600;letter-spacing:.05em;
  padding:7px 16px;border-radius:999px;cursor:pointer;transition:all .25s;
}
.lang-btn:hover{background:var(--navy);color:#fff}
.burger{display:none;background:none;border:none;cursor:pointer;padding:8px}
.burger span{display:block;width:22px;height:2px;background:var(--navy);margin:5px 0;border-radius:2px;transition:.3s}

/* ---------- hero (home) ---------- */
.hero{
  position:relative;overflow:hidden;color:#fff;
  background:linear-gradient(135deg,#061a33 0%,#0a2540 55%,#0e3a66 100%);
  padding:120px 0 130px;
}
.hero .wrap{position:relative;z-index:2}
.hero-tag{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.16em;
  color:#9fc4f5;border:1px solid rgba(159,196,245,.4);border-radius:999px;
  padding:7px 18px;margin-bottom:26px;text-transform:uppercase;
}
.hero h1{
  color:#fff;font-size:clamp(32px,5vw,56px);font-weight:800;
  max-width:820px;margin-bottom:22px;letter-spacing:.01em;
}
.hero h1 .accent{color:var(--green)}
.hero p{max-width:640px;font-size:18px;color:#b9cde6;margin-bottom:40px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 32px;border-radius:999px;font-size:15.5px;font-weight:600;
  transition:transform .25s,box-shadow .25s,background .25s;cursor:pointer;border:none;font-family:inherit;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 24px rgba(26,110,224,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 34px rgba(26,110,224,.45)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-dark{background:var(--navy);color:#fff}
.btn-dark:hover{transform:translateY(-2px);box-shadow:0 14px 30px rgba(10,37,64,.3)}
.hero-art{position:absolute;inset:0;z-index:1;opacity:.9}
.hero-art svg{width:100%;height:100%}

/* route animation */
.route{fill:none;stroke-linecap:round}
.route-line{stroke:rgba(122,193,67,.55);stroke-width:1.6;stroke-dasharray:6 9;animation:dash 26s linear infinite}
.route-line.blue{stroke:rgba(96,165,250,.5)}
.route-line.red{stroke:rgba(240,78,48,.45)}
@keyframes dash{to{stroke-dashoffset:-600}}
.port{fill:#7ac143}
.port.blue{fill:#60a5fa}
.port.red{fill:#f04e30}
.pulse{animation:pulse 3s ease-out infinite;transform-origin:center}
@keyframes pulse{0%{opacity:.9}70%{opacity:.15}100%{opacity:.9}}

/* ---------- page hero (subpages) ---------- */
.page-hero{
  background:linear-gradient(135deg,#061a33,#0a2540 60%,#123c6b);
  color:#fff;padding:88px 0 72px;position:relative;overflow:hidden;
}
.page-hero h1{color:#fff;font-size:clamp(30px,4vw,44px);margin-bottom:14px}
.page-hero p{color:#b9cde6;max-width:640px;font-size:17px}
.page-hero .overline{color:#8fc0f7}
.page-hero .overline::before{background:#8fc0f7}
.page-hero .deco{position:absolute;right:-60px;top:-40px;opacity:.16;width:480px;height:480px}

/* ---------- cards ---------- */
.grid{display:grid;gap:26px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:34px 30px;transition:transform .3s,box-shadow .3s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.card .icon{
  width:56px;height:56px;border-radius:14px;display:flex;align-items:center;justify-content:center;
  background:var(--blue-soft);margin-bottom:22px;
}
.card .icon svg{width:30px;height:30px}
.card h3{margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
.card .more{display:inline-flex;align-items:center;gap:6px;margin-top:18px;color:var(--blue);font-weight:600;font-size:14.5px}
.card.tone-green .icon{background:#eef7e4}
.card.tone-red .icon{background:#fdeee9}
.card.tone-navy .icon{background:#e9eef5}

/* service detail blocks */
.svc{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  padding:64px 0;border-bottom:1px solid var(--line);
}
.svc:last-child{border-bottom:none}
.svc.rev .svc-art{order:2}
.svc h3{font-size:26px;margin-bottom:14px}
.svc p{color:var(--muted);margin-bottom:18px}
.svc-art{
  border-radius:20px;overflow:hidden;background:linear-gradient(145deg,#0a2540,#12406e);
  box-shadow:var(--shadow);min-height:280px;display:flex;align-items:center;justify-content:center;padding:30px;
}
.svc-art svg{width:100%;max-width:420px;height:auto}
.ticks{display:grid;gap:10px;margin-top:6px}
.ticks li{display:flex;gap:12px;align-items:flex-start;font-size:15px;color:var(--ink)}
.ticks li::before{
  content:"";flex:0 0 auto;width:20px;height:20px;margin-top:4px;border-radius:50%;
  background:var(--green) url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="white" stroke-width="3.4" stroke-linecap="round" stroke-linejoin="round"><path d="M5 13l4 4 10-11"/></svg>') center/12px no-repeat;
}
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}
.chip{
  font-size:13.5px;font-weight:600;color:var(--navy);
  background:var(--blue-soft);border-radius:999px;padding:7px 16px;
}

/* ---------- stats ---------- */
.stats{background:var(--navy);color:#fff}
.stats .grid-4{gap:20px}
.stat{text-align:center;padding:28px 10px}
.stat .num{font-size:clamp(36px,4vw,52px);font-weight:800;color:var(--green);line-height:1.1}
.stat .num em{font-style:normal;font-size:.55em;vertical-align:super}
.stat .lbl{margin-top:10px;color:#b9cde6;font-size:15px}

/* ---------- client strip ---------- */
.clients{background:var(--bg)}
.client-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px}
.client-badge{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:16px 26px;font-weight:700;color:var(--navy);font-size:16px;
  display:flex;flex-direction:column;gap:2px;min-width:150px;
}
.client-badge small{font-weight:500;color:var(--muted);font-size:12.5px}

/* ---------- network ---------- */
.net-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.net-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.net-card h3{display:flex;align-items:center;gap:10px;font-size:17px;margin-bottom:12px}
.net-card h3 .dot{width:10px;height:10px;border-radius:50%;background:var(--blue)}
.net-card p{color:var(--muted);font-size:14.5px}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg,#0a2540,#123c6b);
  border-radius:24px;color:#fff;padding:64px 56px;
  display:flex;align-items:center;justify-content:space-between;gap:32px;flex-wrap:wrap;
  position:relative;overflow:hidden;
}
.cta-band h2{color:#fff;margin-bottom:8px}
.cta-band p{color:#b9cde6}
.cta-band .deco{position:absolute;right:-40px;bottom:-70px;width:320px;opacity:.15}

/* ---------- timeline / values ---------- */
.values .grid-4 .card{text-align:left}
.quote{
  border-left:4px solid var(--green);background:var(--bg);
  padding:26px 30px;border-radius:0 var(--radius) var(--radius) 0;
  font-size:18px;color:var(--navy);font-weight:600;margin:32px 0;
}

/* ---------- contact ---------- */
.contact-card{
  background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);
  padding:56px;max-width:680px;margin:0 auto;text-align:center;
}
.mail-big{
  display:inline-flex;align-items:center;gap:14px;font-size:clamp(20px,3vw,30px);
  font-weight:800;color:var(--blue);margin:26px 0 10px;word-break:break-all;
}
.contact-note{color:var(--muted);font-size:15px}

/* ---------- footer ---------- */
.site-footer{background:var(--deep);color:#9db4cf;padding:64px 0 34px;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:44px}
.site-footer h4{color:#fff;font-size:15px;margin-bottom:16px;letter-spacing:.04em}
.site-footer li{margin-bottom:9px}
.site-footer a:hover{color:#fff}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:16px}
.footer-brand svg{width:36px;height:36px}
.footer-brand span{font-weight:800;color:#fff;font-size:18px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:26px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:13px;color:#7089a6}
.footer-bottom-left{display:flex;flex-wrap:wrap;align-items:center;gap:10px}

/* ---------- reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.reveal.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:1024px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:repeat(2,1fr)}
  .net-grid{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:760px){
  section{padding:64px 0}
  .grid-2,.grid-3,.grid-4,.net-grid{grid-template-columns:1fr}
  .svc{grid-template-columns:1fr;gap:30px;padding:48px 0}
  .svc.rev .svc-art{order:0}
  .nav-links{
    display:none;position:absolute;top:74px;left:0;right:0;
    background:#fff;flex-direction:column;gap:0;padding:12px 24px 20px;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow);
  }
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;width:100%}
  .burger{display:block}
  .hero{padding:88px 0 96px}
  .cta-band{padding:44px 30px}
  .contact-card{padding:40px 26px}
}