:root{
  --brand:#ee2d5c; --brand-d:#c81b48; --brand-l:#fdeef3;
  --accent:#f25008; --accent-d:#d84406; --accent-bg:#fff2ea;
  --ink:#1f2a37; --sub:#5b6975; --line:#e6e9ee; --bg:#f7f9fc; --card:#ffffff;
  --maxw:1200px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC",-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:#fff;line-height:1.7;font-size:16px;}
a{color:var(--brand-d);text-decoration:none}
img{max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 40px;}
/* ===== buttons ===== */
.btn{display:inline-block;border-radius:24px;padding:11px 24px;font-size:15px;font-weight:600;cursor:pointer;border:0;transition:.18s;}
.btn.primary{background:var(--accent);color:#fff;}
.btn.primary:hover{background:var(--accent-d);}
.btn.ghost{background:#fff;border:1px solid var(--brand);color:var(--brand-d);}
.btn.ghost:hover{background:var(--brand-l);}
.btn.on-dark{background:#fff;color:var(--brand-d);}
.btn.on-dark:hover{background:#fdeef3;}
/* ===== top nav ===== */
.nav{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(6px);}
.nav .inner{max-width:var(--maxw);margin:0 auto;height:66px;padding:0 40px;display:flex;align-items:center;}
.logo{font-size:22px;font-weight:800;color:var(--brand-d);display:flex;align-items:center;gap:10px;letter-spacing:1px;}
.logo .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--brand),var(--accent));color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;}
.logo .logo-img{height:38px;width:auto;display:block;}
.nav .links{margin-left:42px;display:flex;gap:26px;font-size:15px;}
.nav .links a{color:var(--sub);}
.nav .links a:hover,.nav .links a.active{color:var(--brand);}
.nav .cta{margin-left:auto;display:flex;align-items:center;gap:16px;}
.sys{font-size:14px;color:var(--sub);white-space:nowrap;}
.sys:hover{color:var(--brand);}
@media(max-width:860px){.sys{display:none;}}
/* ===== hero ===== */
.hero{position:relative;padding:84px 0 64px;background:linear-gradient(120deg,var(--brand) 0%,var(--accent) 100%);color:#fff;overflow:hidden;}
.hero .eyebrow{display:inline-block;font-size:13px;letter-spacing:2px;padding:5px 14px;border:1px solid rgba(255,255,255,.4);border-radius:20px;margin-bottom:20px;}
.hero h1{font-size:40px;line-height:1.25;margin:0 0 16px;font-weight:800;white-space:nowrap;max-width:none;}
.hero p.sub{font-size:18px;opacity:.92;max-width:660px;margin:0 0 30px;}
.hero .acts{display:flex;gap:16px;flex-wrap:wrap;}
.stats{display:flex;margin-top:48px;background:rgba(255,255,255,.12);border-radius:16px;overflow:hidden;}
.stats .s{flex:1;padding:20px 16px;text-align:center;border-right:1px solid rgba(255,255,255,.18);}
.stats .s:last-child{border-right:0;}
.stats .s .v{font-size:27px;font-weight:800;}
.stats .s .k{font-size:13px;opacity:.9;margin-top:4px;}
/* ===== section ===== */
section{padding:64px 0;}
.sec-h{font-size:28px;font-weight:800;margin:0 0 8px;}
.sec-t{font-size:15px;color:var(--sub);margin:0 0 34px;max-width:760px;}
.geo{font-size:12px;color:var(--brand);background:var(--brand-l);display:inline-block;padding:3px 10px;border-radius:20px;margin-left:10px;vertical-align:middle;font-weight:600;}
.band{background:var(--bg);}
.band-brand{background:var(--brand-l);}
/* ===== grids ===== */
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.grid2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;}
.grid4{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;}
/* product card */
.pcard{border:1px solid var(--line);border-radius:16px;padding:26px;background:var(--card);transition:.2s;}
.pcard:hover{box-shadow:0 10px 30px rgba(238,45,92,.15);transform:translateY(-3px);}
.pcard .ic{width:50px;height:50px;border-radius:12px;background:var(--brand-l);color:var(--brand-d);display:flex;align-items:center;justify-content:center;font-size:26px;font-weight:800;margin-bottom:14px;}
.pcard .nm{font-size:20px;font-weight:800;color:var(--brand-d);}
.pcard .tg{font-size:14px;color:var(--sub);margin:4px 0 12px;}
.pcard .sl{font-size:14px;background:var(--accent-bg);border-radius:10px;padding:10px 12px;margin-bottom:12px;}
.pcard .fit{font-size:13px;color:var(--sub);}
.pcard ul{margin:12px 0 0;padding-left:18px;font-size:13px;color:var(--ink);}
.pcard ul li{margin:6px 0;}
/* capability */
.cap{border:1px solid var(--line);border-radius:14px;padding:22px;text-align:center;background:var(--card);}
.cap .v{font-size:30px;font-weight:800;color:var(--brand);}
.cap .k{font-size:14px;color:var(--ink);margin-top:6px;}
.cap .d{font-size:12px;color:var(--sub);margin-top:4px;}
/* case */
.case{border:1px solid var(--line);border-radius:16px;padding:24px;background:var(--card);}
.case .quote{font-size:15px;border-left:3px solid var(--accent);padding-left:14px;margin:0 0 16px;font-style:normal;}
.case .meta{display:flex;align-items:center;gap:10px;}
.case .av{width:38px;height:38px;border-radius:50%;background:var(--brand-l);color:var(--brand-d);display:flex;align-items:center;justify-content:center;font-weight:700;}
.case .who{font-size:14px;font-weight:600;}
.case .tag{font-size:12px;color:var(--sub);background:#f7f0f2;padding:2px 10px;border-radius:20px;}
/* creds */
.creds{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;}
.cred{border:1px solid var(--line);border-radius:14px;padding:20px;text-align:center;background:#fff;}
.cred .ic{font-size:30px;}
.cred .t{font-size:14px;font-weight:600;margin-top:8px;}
.cred .d{font-size:12px;color:var(--sub);margin-top:4px;}
.logos{display:flex;gap:14px;flex-wrap:wrap;margin-top:18px;}
.logos .lg{height:42px;line-height:42px;padding:0 18px;border:1px dashed var(--line);border-radius:10px;color:var(--sub);font-size:13px;background:#fdf6f8;}
/* resource cards */
.res{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;}
.rcard{border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;display:flex;flex-direction:column;}
.rcard .top{min-height:96px;background:linear-gradient(120deg,var(--brand),var(--accent));color:#fff;padding:18px;font-size:16px;font-weight:700;}
.rcard .top small{display:block;font-size:12px;opacity:.85;font-weight:400;margin-top:6px;}
.rcard .bd{padding:16px 18px;flex:1;}
.rcard .bd p{font-size:13px;color:var(--sub);margin:0 0 14px;}
.rcard .dl{font-size:13px;color:var(--accent-d);font-weight:700;}
/* news */
.news{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;}
.nitem{border:1px solid var(--line);border-radius:12px;padding:16px 18px;background:#fff;display:flex;flex-direction:column;gap:6px;}
.nitem .tt{font-size:15px;font-weight:600;}
.nitem .dt{font-size:12px;color:var(--sub);}
.nitem .kw{font-size:12px;color:var(--brand);}
/* dual */
.dual{display:grid;grid-template-columns:1fr 1fr;gap:22px;}
.dual .col{border-radius:16px;padding:26px;border:1px solid var(--line);}
.dual .B{background:var(--brand-l);}
.dual h4{margin:0 0 14px;font-size:18px;color:var(--brand-d);}
.dual ul{margin:0;padding-left:18px;font-size:14px;}
.dual ul li{margin:9px 0;}
.tags{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px;}
.tags span{font-size:13px;color:var(--sub);background:#fff;border:1px solid var(--line);padding:6px 14px;border-radius:20px;}
/* why-us strip */
.why{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.why .w{border:1px solid var(--line);border-radius:14px;padding:22px;background:#fff;}
.why .w .h{font-size:17px;font-weight:700;color:var(--brand-d);margin-bottom:8px;}
.why .w p{font-size:14px;color:var(--sub);margin:0;}
/* breadcrumb */
.crumb{font-size:13px;color:var(--sub);padding:16px 0 0;}
.crumb a{color:var(--sub);}
/* page hero */
.phero{padding:54px 0;background:linear-gradient(120deg,var(--brand) 0%,var(--accent) 100%);color:#fff;}
.phero h1{font-size:34px;margin:0 0 10px;font-weight:800;}
.phero p{font-size:16px;opacity:.92;margin:0;max-width:720px;}
/* about */
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:30px;align-items:start;}
.about-grid p{font-size:15px;color:#33414f;}
.kv{font-size:14px;}
.kv .row{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);}
.kv .row .k{color:var(--sub);min-width:96px;}
.note{font-size:12px;color:var(--accent);margin-top:14px;}
/* FAQ */
.faq details{border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:12px;background:#fff;cursor:pointer;}
.faq summary{font-size:16px;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between;align-items:center;}
.faq summary::-webkit-details-marker{display:none;}
.faq summary:after{content:"+";color:var(--brand);font-size:20px;}
.faq details[open] summary:after{content:"\2212";}
.faq .ans{font-size:14px;color:var(--sub);margin-top:12px;}
/* contact */
.form{display:grid;grid-template-columns:1fr 1fr;gap:16px;max-width:640px;}
.form .full{grid-column:1/3;}
.form label{font-size:13px;color:var(--sub);display:block;margin-bottom:6px;}
.form input,.form textarea{width:100%;border:1px solid var(--line);border-radius:10px;padding:11px 13px;font-size:14px;font-family:inherit;color:var(--ink);}
.form input:focus,.form textarea:focus{outline:0;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-l);}
.info-box{border:1px solid var(--line);border-radius:14px;padding:22px;background:var(--bg);}
.info-box .row{display:flex;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px;}
.info-box .row:last-child{border-bottom:0;}
.info-box .row .k{color:var(--sub);min-width:80px;}
/* footer */
footer{background:#360f20;color:#f0dde4;padding:50px 0 30px;font-size:13px;line-height:1.9;margin-top:0;}
footer .fgrid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.4fr;gap:26px;}
footer .ft{font-size:15px;font-weight:700;color:#fff;margin-bottom:12px;}
footer a{color:#f0dde4;}
footer .copy{margin-top:30px;padding-top:16px;border-top:1px solid rgba(255,255,255,.12);font-size:12px;opacity:.8;}
.copy a{text-decoration:underline;}
/* responsive */
@media (max-width:1150px){
  .hero h1{white-space:normal;font-size:36px;}
}
@media (max-width:900px){
  .wrap,.nav .inner{padding:0 20px;}
  .hero h1{font-size:30px;}
  .grid3,.grid4,.res,.why{grid-template-columns:1fr;}
  .grid2,.dual,.news,.about-grid,.form{grid-template-columns:1fr;}
  .form .full{grid-column:1;}
  .stats{flex-wrap:wrap;}
  .stats .s{flex:1 1 50%;border-bottom:1px solid rgba(255,255,255,.18);}
  .creds{grid-template-columns:1fr 1fr;}
  .nav .links{display:none;}
  footer .fgrid{grid-template-columns:1fr 1fr;}
}