:root{
  --navy:#0c1c2e;
  --navy-2:#13283f;
  --ink:#15202b;
  --muted:#5b6773;
  --line:#dfe5eb;
  --paper:#f5f7fa;
  --white:#fff;
  --orange:#e86b12;
  --orange-d:#c6550a;
  --ok:#1f6b4a;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  color:var(--ink);
  background:var(--white);
  font:16px/1.6 "Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
}
img{max-width:100%;height:auto;display:block}
a{color:var(--navy);text-decoration:none}
a:hover{color:var(--orange-d)}
.wrap{width:min(1160px,calc(100% - 32px));margin-inline:auto}
.skip{position:absolute;left:-999px;top:0}
.skip:focus{left:12px;background:#fff;padding:8px;z-index:9}

/* header */
.topbar{background:var(--navy);color:#c9d4e0;font-size:13px}
.topbar .wrap{display:flex;justify-content:space-between;gap:12px;padding:7px 0;flex-wrap:wrap}
.topbar a{color:#e8eef4}
.header{position:sticky;top:0;z-index:40;background:#fff;border-bottom:1px solid var(--line)}
.header-row{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0}
.brand{display:flex;align-items:center;gap:10px;color:var(--navy)}
.brand-mark{font-weight:800;letter-spacing:.04em;font-size:26px;line-height:1}
.brand-mark span{color:var(--orange)}
.brand-sub{font-size:11px;color:var(--muted);letter-spacing:.02em}
.nav{display:flex;gap:2px;align-items:center}
.nav>a,.nav summary{
  display:block;padding:10px 12px;color:var(--navy);font-weight:600;font-size:14px;cursor:pointer;list-style:none
}
.nav summary::-webkit-details-marker{display:none}
.nav>a:hover,.nav details:hover summary{color:var(--orange-d)}
.mega{
  position:absolute;right:0;left:0;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:0 16px 30px rgba(12,28,46,.08);padding:18px 0 24px
}
.mega-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:6px}
.mega a{display:block;padding:8px 10px;border-radius:6px;font-size:13px}
.mega a:hover{background:var(--paper)}
.menu-btn{display:none;background:none;border:1px solid var(--line);padding:8px 10px;border-radius:6px}
.cta-mail{
  background:var(--orange);color:#fff!important;border-radius:6px;padding:9px 14px!important;font-weight:700!important
}
.cta-mail:hover{background:var(--orange-d)}

/* hero */
.hero{
  position:relative;overflow:hidden;color:#fff;
  min-height:520px;padding:72px 0 64px;
  background:var(--navy) url("../img/brand/banner-1.webp") center right / cover no-repeat;
}
.hero-slides{position:absolute;inset:0}
.hero-slide{
  position:absolute;inset:0;
  background-position:center right;background-size:cover;background-repeat:no-repeat;
  opacity:0;animation:heroFade 24s infinite;
}
.hero-slide.s1{background-image:url("../img/brand/banner-1.webp")}
.hero-slide.s2{background-image:url("../img/brand/banner-2.webp");animation-delay:6s}
.hero-slide.s3{background-image:url("../img/brand/banner-3.webp");animation-delay:12s}
.hero-slide.s4{background-image:url("../img/brand/banner-4.webp");animation-delay:18s}
@keyframes heroFade{
  0%{opacity:0}
  4%{opacity:1}
  21%{opacity:1}
  25%{opacity:0}
  100%{opacity:0}
}
.hero .wrap{position:relative;z-index:1}
.hero h1{margin:0 0 12px;font-size:clamp(28px,4.4vw,48px);line-height:1.15;letter-spacing:-.02em;max-width:680px;text-shadow:0 2px 18px rgba(8,16,28,.45)}
.hero p.lead{max-width:620px;color:#d7e0ea;font-size:18px;margin:0 0 22px;text-shadow:0 1px 12px rgba(8,16,28,.4)}
.hero-actions{display:flex;gap:10px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 16px;border-radius:6px;font-weight:700;border:1px solid transparent
}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-d);color:#fff}
.btn-ghost{border-color:#8ea0b3;color:#fff}
.btn-ghost:hover{background:#fff;color:var(--navy)}
.btn-line{border-color:var(--line);color:var(--navy);background:#fff}
.pills{display:flex;flex-wrap:wrap;gap:8px;margin-top:28px}
.pill{border:1px solid rgba(255,255,255,.22);padding:6px 10px;border-radius:999px;font-size:12px;color:#e6edf4}

/* sections */
section{padding:56px 0}
.sec-h{display:flex;justify-content:space-between;gap:16px;align-items:end;margin-bottom:22px}
.sec-h h2{margin:0;font-size:28px;letter-spacing:-.02em}
.kicker{color:var(--orange-d);font-weight:700;font-size:12px;letter-spacing:.12em;text-transform:uppercase;margin:0 0 6px}
.muted{color:var(--muted)}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.card{
  background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;display:flex;flex-direction:column
}
.card:hover{border-color:#c9d3de}
.card .ph{
  background:linear-gradient(#eef2f6,#e3e8ee);aspect-ratio:16/10;display:flex;align-items:center;justify-content:center;padding:12px
}
.card .ph img{max-height:180px;object-fit:contain}
.card .bd{padding:14px 14px 16px}
.card h3{margin:0 0 6px;font-size:16px}
.tag{display:inline-block;font-size:11px;color:var(--muted);background:var(--paper);padding:2px 7px;border-radius:999px}
.facts{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:8px}
.fact{background:var(--navy);color:#fff;border-radius:10px;padding:18px}
.fact b{display:block;font-size:22px}
.fact span{color:#c5d2df;font-size:13px}
.panel{background:var(--paper);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.split{display:grid;grid-template-columns:1.15fr .85fr;gap:36px;align-items:start}
.list{margin:0;padding:0;list-style:none}
.list li{padding:8px 0 8px 18px;position:relative}
.list li:before{content:"";position:absolute;left:0;top:16px;width:8px;height:8px;background:var(--orange);border-radius:2px}

/* product page */
.crumbs{font-size:13px;color:var(--muted);padding:16px 0 0}
.crumbs a{color:var(--muted)}
.p-hero{display:grid;grid-template-columns:1.05fr .95fr;gap:28px;padding:24px 0 40px}
.p-photo{background:#eef2f6;border:1px solid var(--line);border-radius:12px;padding:18px;display:flex;align-items:center;justify-content:center;min-height:320px}
.p-photo img{max-height:420px;object-fit:contain}
.meta{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0 16px}
.kv{width:100%;border-collapse:collapse;font-size:14px}
.kv th,.kv td{text-align:left;padding:8px 10px;border-bottom:1px solid var(--line);vertical-align:top}
.kv th{width:160px;color:var(--muted);font-weight:600}
table.apps{width:100%;border-collapse:collapse;font-size:14px}
table.apps th,table.apps td{border-bottom:1px solid var(--line);text-align:left;padding:8px 10px}
table.apps th{background:var(--paper);font-size:12px;letter-spacing:.04em;text-transform:uppercase;color:var(--muted)}

/* knowledge / news */
.prose{max-width:760px}
.prose h1{margin:10px 0 8px;font-size:34px}
.prose p{margin:0 0 14px}
.article-list .card .bd{min-height:120px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.box{border:1px solid var(--line);border-radius:10px;padding:20px;background:#fff}
.box h2{margin-top:0}

/* footer */
footer{background:var(--navy);color:#c5d0db;padding:36px 0 18px;margin-top:20px}
footer a{color:#e7eef5}
.f-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:24px}
.f-copy{border-top:1px solid #2a3d52;margin-top:24px;padding-top:14px;font-size:12px;color:#93a3b3}
.email-float{
  position:fixed;right:16px;bottom:16px;z-index:30;
  background:var(--orange);color:#fff;border-radius:999px;padding:12px 16px;font-weight:700;
  box-shadow:0 10px 24px rgba(232,107,18,.35)
}
.email-float:hover{background:var(--orange-d);color:#fff}

/* cats */
.cat-list{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 22px}
.cat-list a{border:1px solid var(--line);padding:6px 10px;border-radius:999px;font-size:13px}
.cat-list a.active,.cat-list a:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.search{width:100%;max-width:360px;padding:10px 12px;border:1px solid var(--line);border-radius:8px;font:inherit}

@media (max-width:900px){
  .grid-4,.grid-3,.facts,.split,.p-hero,.contact-grid,.f-grid{grid-template-columns:1fr}
  .grid-2{grid-template-columns:1fr}
  .menu-btn{display:block}
  .nav{display:none;position:absolute;left:0;right:0;top:100%;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 16px 16px}
  body.nav-open .nav{display:flex}
  .mega{position:static;box-shadow:none;border:0;padding:0 0 8px}
  .hero{padding:42px 0}
  section{padding:40px 0}
}

html[lang="zh-CN"] body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC","Segoe UI",Roboto,Arial,sans-serif;
}
.lang-switch{white-space:nowrap}
.lang-switch a{color:#e8eef4;font-weight:600}
.lang-switch a[aria-current="true"]{color:#fff}
.lang-switch .sep{opacity:.45;padding:0 2px}