:root{
  --bg:#060D17; --panel:#0C1725; --panel2:#0A1320;
  --navy:#081120; --blue:#14456F; --blue2:#2E86D6; --sky:#4FC3E8;
  --cyan:#29D3EE; --cyan-d:#19A8C4; --ice:rgba(41,211,238,.07); --ice2:#0A1420;
  --teal:#2DD4A7; --amber:#F0B554; --plum:#A78BFA; --red:#F87171;
  --grid:rgba(41,211,238,.06);
  --hi:#EAF2FA; --txt:#D9E5F2; --mut:#8AA0B8; --line:rgba(94,182,232,.16);
  --r:10px; --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"Segoe UI","Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--txt);background:var(--bg);line-height:1.65;font-size:15px}
img{max-width:100%;display:block}
a{color:var(--sky);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(6,13,23,.90);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:19px;color:var(--hi);letter-spacing:.5px}
.logo .mark{width:30px;height:30px;background:linear-gradient(135deg,var(--cyan),#14456F);border-radius:6px;position:relative;flex:none;box-shadow:0 0 14px rgba(41,211,238,.35)}
.logo .mark::after{content:"";position:absolute;inset:7px;border:2px solid #04121F;border-radius:3px;border-right-color:transparent;transform:rotate(45deg)}
.logo small{font-size:10px;font-weight:400;color:var(--mut);display:block;letter-spacing:.3px;line-height:1.2}
nav.main{display:flex;align-items:center;gap:22px}
nav.main a{color:var(--txt);font-size:14px;font-weight:500}
nav.main a:hover{color:var(--cyan);text-decoration:none}
nav.main a.on{color:var(--cyan)}
.btn{display:inline-block;background:linear-gradient(135deg,#29D3EE,#1A9CC4);color:#04121F !important;padding:9px 20px;border-radius:6px;font-size:14px;font-weight:600;border:none;cursor:pointer;box-shadow:0 2px 14px rgba(41,211,238,.22)}
.btn:hover{background:linear-gradient(135deg,#3FE0F8,#22ACD2);text-decoration:none;box-shadow:0 4px 20px rgba(41,211,238,.35)}
.btn.ghost{background:transparent;color:var(--cyan) !important;border:1px solid rgba(41,211,238,.45);box-shadow:none}
.btn.ghost:hover{background:rgba(41,211,238,.08);box-shadow:none}
.btn.line{background:transparent;color:#fff !important;border:1px solid rgba(255,255,255,.55);box-shadow:none}
.btn.line:hover{background:rgba(255,255,255,.10)}
#navT{display:none}
.burger{display:none;font-size:22px;color:var(--cyan);cursor:pointer;background:none;border:none;line-height:1}

/* hero */
.hero{background:
  linear-gradient(rgba(4,10,20,.78),rgba(6,15,28,.86)),
  radial-gradient(1100px 420px at 72% 18%, rgba(41,211,238,.13), transparent 62%),
  repeating-linear-gradient(0deg,transparent 0 39px,var(--grid) 39px 40px),
  repeating-linear-gradient(90deg,transparent 0 39px,var(--grid) 39px 40px),
  url("../img/service_s01_0.jpg") center/cover;
  color:#fff;padding:96px 0 88px}
.hero h1{font-size:38px;line-height:1.25;font-weight:700;max-width:760px}
.hero p{margin:18px 0 30px;font-size:17px;max-width:680px;color:#A9C6DD}
.hero .btn{margin-right:12px;margin-top:6px}
.kicker{display:inline-block;font-size:12px;font-weight:600;letter-spacing:2px;text-transform:uppercase;
  color:var(--cyan);margin-bottom:14px}
.hero .kicker{color:#5FD0E8}

/* stats bar */
.stats{background:var(--navy);color:#fff;padding:26px 0;border-top:1px solid rgba(41,211,238,.30);border-bottom:1px solid rgba(41,211,238,.30)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stats .wrap>div{border-left:1px solid rgba(255,255,255,.10)}
.stats .wrap>div:first-child{border-left:none}
.stats b{font-size:24px;display:block;color:#fff;font-variant-numeric:tabular-nums;letter-spacing:.5px}
.stats span{font-size:12.5px;color:#7E97B2}

/* sections */
section{padding:64px 0}
section.alt{background:var(--ice2)}
h2.sec{font-size:26px;color:var(--hi);font-weight:700;margin-bottom:8px;padding-left:14px;position:relative}
h2.sec::before{content:"";position:absolute;left:0;top:6px;width:5px;height:22px;background:var(--cyan);border-radius:2px;box-shadow:0 0 10px rgba(41,211,238,.5)}
p.lead{color:var(--mut);max-width:780px;margin-bottom:34px}
.grid{display:grid;gap:22px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-top:3px solid rgba(41,211,238,.55);border-radius:var(--r);overflow:hidden;display:flex;flex-direction:column;transition:border-color .18s,box-shadow .18s}
.card:hover{border-color:rgba(41,211,238,.45);border-top-color:var(--cyan);box-shadow:0 8px 28px rgba(41,211,238,.12)}
.card .ph{height:190px;background:#0E1B2B center/cover;position:relative}
.card .bd{padding:18px 20px 20px;flex:1}
.card h3{font-size:16.5px;color:var(--hi);margin-bottom:8px;font-weight:600}
.card p{font-size:13.5px;color:var(--mut)}
.card .more{font-size:13px;font-weight:600;margin-top:12px;display:inline-block}
.tag{display:inline-block;background:rgba(41,211,238,.08);color:var(--cyan);font-size:11px;font-weight:600;
  padding:3px 10px;border-radius:20px;margin-bottom:10px;letter-spacing:.4px;border:1px solid rgba(41,211,238,.28)}

/* feature rows */
.frow{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;margin-bottom:56px}
.frow.rev{direction:rtl}
.frow.rev>*{direction:ltr}
.frow .img{border-radius:var(--r);overflow:hidden;border:1px solid var(--line);height:340px;background:#0E1B2B center/cover}
.frow h3{font-size:21px;color:var(--hi);margin-bottom:12px;font-weight:700}
.frow p{color:var(--mut);font-size:14.5px;margin-bottom:10px}

/* lists */
ul.tick{list-style:none;margin:10px 0}
ul.tick li{padding:5px 0 5px 26px;position:relative;font-size:14px;color:var(--txt)}
ul.tick li::before{content:"";position:absolute;left:2px;top:11px;width:12px;height:7px;
  border-left:2.5px solid var(--cyan);border-bottom:2.5px solid var(--cyan);transform:rotate(-45deg)}

/* tables */
table{width:100%;border-collapse:collapse;font-size:13.5px;background:var(--panel);font-variant-numeric:tabular-nums}
th{background:#0A1826;color:var(--hi);text-align:left;padding:11px 14px;font-weight:600;border-bottom:3px solid var(--cyan);letter-spacing:.3px}
td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top;color:var(--txt)}
tr:nth-child(even) td{background:rgba(94,182,232,.04)}
td:first-child{color:var(--hi)}
.tbl{border:1px solid var(--line);border-radius:var(--r);overflow:auto;margin:16px 0}

/* CFRP product lines */
.lines{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin:22px 0 8px}
.line{background:var(--panel);border:1px solid var(--line);border-top:3px solid var(--ac,var(--blue2));border-radius:var(--r);padding:16px 16px 14px;position:relative}
.line .lt{font-size:30px;font-weight:700;color:var(--ac,var(--sky));line-height:1;font-variant-numeric:tabular-nums}
.line h4{font-size:14.5px;color:var(--hi);margin:8px 0 4px;font-weight:600}
.line p{font-size:12.5px;color:var(--mut);line-height:1.5}
.line.e{--ac:var(--teal)} .line.m{--ac:var(--blue2)} .line.x{--ac:var(--amber)} .line.p{--ac:var(--plum)}

/* steps */
.steps{counter-reset:s;display:grid;gap:14px}
.step{display:flex;gap:14px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:14px 18px}
.step::before{counter-increment:s;content:counter(s);flex:none;width:30px;height:30px;border-radius:50%;
  background:rgba(41,211,238,.12);color:var(--cyan);font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center;font-variant-numeric:tabular-nums}
.step b{font-size:14.5px;color:var(--hi);display:block}
.step span{font-size:13.5px;color:var(--mut)}

/* gallery */
.gal{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gal figure{border:1px solid var(--line);border-radius:8px;overflow:hidden;background:var(--panel)}
.gal img{height:140px;width:100%;object-fit:cover}
.gal figcaption{font-size:12px;color:var(--mut);padding:8px 10px;line-height:1.4}

/* callout */
.callout{background:rgba(41,211,238,.06);border-left:4px solid var(--cyan);border-radius:6px;padding:14px 18px;font-size:13.5px;color:var(--txt);margin:16px 0}
.callout.warn{background:rgba(248,113,113,.08);border-color:var(--red)}

/* cta strip */
.cta{background:
  radial-gradient(900px 300px at 50% 0%, rgba(41,211,238,.12), transparent 65%),
  linear-gradient(120deg,#081120,#123C63);
  color:#fff;padding:54px 0;text-align:center}
.cta h2{font-size:26px;font-weight:700;margin-bottom:10px}
.cta p{color:#A9C6DD;margin-bottom:22px}

/* philosophy band */
.philo{background:
  linear-gradient(120deg,rgba(6,13,23,.96),rgba(10,38,62,.94)),
  radial-gradient(800px 260px at 50% 110%, rgba(41,211,238,.10), transparent 70%),
  repeating-linear-gradient(0deg,transparent 0 39px,var(--grid) 39px 40px),
  repeating-linear-gradient(90deg,transparent 0 39px,var(--grid) 39px 40px);
  color:#fff;padding:64px 0;text-align:center;border-top:1px solid rgba(41,211,238,.30);border-bottom:1px solid rgba(41,211,238,.30)}
.philo .kicker{color:#5FD0E8}
.philo .zh{font-size:44px;font-weight:700;letter-spacing:10px;margin:6px 0 4px;color:#fff}
.philo .tr{font-size:16px;font-style:italic;color:var(--cyan);margin-bottom:20px}
.philo p:not(.tr){max-width:820px;margin:0 auto;color:#A9C6DD;font-size:15.5px}
.philo p b{color:#fff}

/* page head */
.phead{background:
  linear-gradient(120deg,rgba(6,13,23,.94),rgba(18,60,99,.90)),
  radial-gradient(900px 320px at 80% 10%, rgba(41,211,238,.12), transparent 60%),
  repeating-linear-gradient(0deg,transparent 0 39px,var(--grid) 39px 40px),
  repeating-linear-gradient(90deg,transparent 0 39px,var(--grid) 39px 40px);
  color:#fff;padding:56px 0}
.phead h1{font-size:32px;font-weight:700}
.phead p{color:#A9C6DD;max-width:760px;margin-top:10px}
.crumb{font-size:12.5px;color:#5FD0E8;margin-bottom:12px}
.crumb a{color:#5FD0E8}

/* library */
.libcard{display:flex;gap:16px;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:14px;margin-bottom:14px;align-items:flex-start}
.libcard img{width:150px;height:96px;object-fit:cover;border-radius:6px;flex:none;background:#0E1B2B}
.libcard h3{font-size:15.5px;color:var(--hi);margin-bottom:5px;font-weight:600}
.libcard p{font-size:13px;color:var(--mut)}
.libcard .meta{font-size:11.5px;color:var(--sky);margin-top:6px}
.facts{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;margin:18px 0}
.fact{background:var(--panel);border:1px solid var(--line);border-radius:8px;padding:10px 14px}
.fact b{display:block;font-size:12px;color:var(--cyan);text-transform:uppercase;letter-spacing:.5px}
.fact span{font-size:13.5px;color:var(--txt)}

/* footer */
footer{background:#040A12;color:#8FA3B8;padding:44px 0 26px;font-size:13px}
footer .wrap{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
footer h4{color:#fff;font-size:14px;margin-bottom:12px;font-weight:600}
footer a{color:#8FA3B8;display:block;padding:3px 0}
footer a:hover{color:#fff;text-decoration:none}
.fbot{border-top:1px solid rgba(255,255,255,.08);margin-top:30px;padding-top:18px;text-align:center;font-size:12px;color:#5E748C}

/* lib doc page */
.doc h2{font-size:19px;color:var(--hi);margin:34px 0 14px;font-weight:700;padding-bottom:8px;border-bottom:2px solid rgba(41,211,238,.18)}
.doc .steps{margin:14px 0}

@media(max-width:960px){
  .g4{grid-template-columns:repeat(2,1fr)} .g3{grid-template-columns:repeat(2,1fr)}
  .lines{grid-template-columns:repeat(2,1fr)}
  .frow{grid-template-columns:1fr}
  footer .wrap{grid-template-columns:1fr 1fr}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .gal{grid-template-columns:repeat(2,1fr)}
  nav.main{display:none;position:absolute;top:64px;left:0;right:0;background:#0A1420;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;padding:10px 24px 18px;gap:4px}
  nav.main a{padding:10px 0;border-bottom:1px solid rgba(94,182,232,.10)}
  #navT:checked ~ nav.main{display:flex}
  .burger{display:block}
  .hero h1{font-size:28px}
}
@media(max-width:560px){
  .g2,.g3,.g4{grid-template-columns:1fr}
  footer .wrap{grid-template-columns:1fr}
}