:root{
  --bg:#f5fafd; --ink:#0e2233; --ink-2:#405c74; --ink-3:#8299ad;
  --line:#e2edf4; --card:#ffffff;
  --sky:#0075C9; --cyan:#2E9BD8;
  --grad:linear-gradient(135deg,#1668AE 0%,#2E9BD8 100%);
  --soft:#e8f2fb;
  --r:20px;
  --sh-sm:0 1px 2px rgba(14,34,51,.05);
  --sh-md:0 14px 36px -14px rgba(14,34,51,.16);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","HarmonyOS Sans SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:1120px;margin:0 auto;padding:0 22px}

/* ---------- nav ---------- */
header.top{
  position:sticky;top:0;z-index:50;background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:18px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:.02em}
.brand svg{flex:none}
.brand small{display:block;font-size:10.5px;font-weight:600;color:var(--ink-3);letter-spacing:.22em;margin-top:-3px}
.navlinks{display:flex;align-items:center;gap:26px;font-size:15px;font-weight:500;color:var(--ink-2)}
.navlinks a:hover{color:var(--sky)}
.nav-cta{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;
  font-weight:600;font-size:15px;padding:12px 22px;transition:.22s ease;white-space:nowrap;cursor:pointer;border:0}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 26px -10px rgba(25,111,184,.55)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 16px 30px -10px rgba(25,111,184,.65)}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line)}
.btn-ghost:hover{border-color:#b6d6ef;color:var(--sky)}
.btn-sm{padding:9px 18px;font-size:14px}
#navToggle{display:none;background:none;border:0;padding:8px;cursor:pointer}
#navToggle span{display:block;width:22px;height:2px;background:var(--ink);border-radius:2px;margin:5px 0;transition:.25s}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;padding:70px 0 60px}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background:
    radial-gradient(560px 320px at 88% 6%, rgba(46,155,216,.16), transparent 70%),
    radial-gradient(640px 360px at 6% 30%, rgba(25,111,184,.13), transparent 70%);
}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.04fr .96fr;gap:54px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:13.5px;font-weight:700;color:var(--sky);
  background:#fff;border:1px solid #cfe4f5;border-radius:999px;padding:7px 14px;box-shadow:var(--sh-sm)}
.eyebrow i{width:7px;height:7px;border-radius:50%;background:var(--grad);display:inline-block}
h1{font-size:clamp(31px,4.4vw,48px);line-height:1.18;font-weight:800;margin:20px 0 18px;letter-spacing:.01em}
h1 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:16.5px;color:var(--ink-2);max-width:32em}
.hero-actions{display:flex;gap:14px;margin:28px 0 22px;flex-wrap:wrap}
.hero-trust{display:flex;gap:16px;flex-wrap:wrap;font-size:14px;color:var(--ink-3)}
.hero-trust span{display:inline-flex;align-items:center;gap:6px}
.hero-trust svg{color:var(--cyan);flex:none}

/* hero visual */
.panel{position:relative;border-radius:26px;padding:24px;border:1px solid #cfe4f5;
  background:linear-gradient(160deg,#eaf7fd 0%,#f8fdff 52%,#e9f7fb 100%);box-shadow:var(--sh-md)}
.panel::before{content:"";position:absolute;inset:0;border-radius:26px;pointer-events:none;opacity:.55;
  background-image:linear-gradient(rgba(14,34,51,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(14,34,51,.045) 1px,transparent 1px);
  background-size:24px 24px;mask-image:linear-gradient(180deg,#000 65%,transparent)}
.panel .glow{position:absolute;width:220px;height:220px;border-radius:50%;filter:blur(52px);opacity:.55;pointer-events:none}
.panel .g1{background:#8fd8f2;top:-60px;right:-40px}
.panel .g2{background:#9fe9df;bottom:-70px;left:-50px;opacity:.45}
.panel .cap{position:relative;display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.chip{display:inline-flex;align-items:center;gap:7px;background:#fff;border:1px solid #dceef7;border-radius:999px;
  padding:6px 12px;font-size:12.5px;font-weight:600;color:var(--ink-2);box-shadow:var(--sh-sm)}
.chip i.dot{width:7px;height:7px;border-radius:50%;background:#2fc28f;animation:pulse 2.4s infinite}
@keyframes pulse{0%,100%{box-shadow:0 0 0 0 rgba(47,194,143,.45)}55%{box-shadow:0 0 0 6px rgba(47,194,143,0)}}
.tiles{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.tile{background:#fff;border:1px solid #e3f0f7;border-radius:16px;padding:16px 16px 14px;box-shadow:var(--sh-sm)}
.tile .ic{width:34px;height:34px;border-radius:10px;background:var(--soft);color:var(--sky);
  display:flex;align-items:center;justify-content:center;margin-bottom:10px}
.tile b{font-size:15px;display:block}
.tile span{font-size:13px;color:var(--ink-3)}
.panel .foot{position:relative;margin-top:14px;display:flex;justify-content:space-between;align-items:center;
  font-size:12.5px;color:var(--ink-3);padding:0 4px}

/* stats strip */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:var(--card);border:1px solid var(--line);
  border-radius:20px;box-shadow:var(--sh-sm);overflow:hidden}
.stats .st{padding:22px 20px;border-left:1px solid var(--line);text-align:center}
.stats .st:first-child{border-left:0}
.stats .st b{display:block;font-size:26px;font-weight:800;letter-spacing:.01em;
  background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stats .st span{font-size:13.5px;color:var(--ink-3)}

/* ---------- sections ---------- */
section{padding:70px 0}
.sec-head{max-width:680px;margin-bottom:38px}
.eyebrow-line{display:flex;align-items:center;gap:10px;font-size:13.5px;font-weight:700;color:var(--sky)}
.eyebrow-line::before{content:"";width:20px;height:2.5px;border-radius:2px;background:var(--grad)}
h2{font-size:clamp(25px,3.1vw,33px);font-weight:800;margin:12px 0 10px;letter-spacing:.01em}
.sec-sub{color:var(--ink-2);font-size:15.5px}

/* services bento */
.bento{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.svc{grid-column:span 2;background:var(--card);border:1px solid var(--line);border-radius:var(--r);
  padding:24px;box-shadow:var(--sh-sm);transition:.25s ease}
.svc:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:#cde8f4}
.svc.w4{grid-column:span 4}
.svc.w6{grid-column:span 6}
.svc.hero-card{background:linear-gradient(150deg,#ffffff 30%,#f2fbff 100%)}
.svc h3{font-size:17px;display:flex;align-items:center;gap:10px;font-weight:700}
.svc h3 .ic{width:30px;height:30px;border-radius:9px;background:var(--soft);color:var(--sky);flex:none;
  display:flex;align-items:center;justify-content:center}
.svc p{color:var(--ink-2);font-size:14.8px;margin-top:11px;line-height:1.78}
.svc .chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:15px}
.tag{font-size:12.5px;padding:4.5px 10px;border-radius:999px;background:var(--soft);color:#157a9e;font-weight:600}
.svc.w6{display:flex;align-items:center;gap:22px;flex-wrap:wrap}
.svc.w6 .grow{flex:1;min-width:240px}
.svc.w6 h3{margin-bottom:2px}

/* why */
.why{display:grid;grid-template-columns:repeat(4,1fr);gap:0;background:var(--card);border:1px solid var(--line);
  border-radius:22px;box-shadow:var(--sh-sm);overflow:hidden}
.why .item{padding:26px 24px;border-left:1px solid var(--line)}
.why .item:first-child{border-left:0}
.why b{display:flex;align-items:center;gap:8px;font-size:15.5px;margin-bottom:8px}
.why b svg{color:var(--cyan);flex:none}
.why p{font-size:14.2px;color:var(--ink-2);line-height:1.8}

/* tech compare */
.tech{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:18px}
.tech .col{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--sh-sm)}
.tech .col.good{border-color:#cfe9f6;background:linear-gradient(155deg,#ffffff 40%,#f3fbfe 100%)}
.tech .col h4{font-size:16px;display:flex;align-items:center;gap:9px;margin-bottom:14px}
.tech .col h4 .badge{font-size:11.5px;font-weight:700;padding:3px 9px;border-radius:999px}
.tech .col.good h4 .badge{background:#e4f7ee;color:#178a5e}
.tech .col.bad h4 .badge{background:#fdeeee;color:#b3453f}
.tech ul{list-style:none;display:grid;gap:10px}
.tech li{font-size:14.3px;color:var(--ink-2);display:flex;gap:9px;line-height:1.7}
.tech li::before{content:"";width:5px;height:5px;border-radius:50%;background:var(--cyan);flex:none;margin-top:9px}
.tech .col.bad li::before{background:#d9a3a0}
.tech-note{margin-top:16px;font-size:14px;color:var(--ink-2);background:#fff;border:1px solid var(--line);
  border-left:3px solid var(--cyan);border-radius:12px;padding:14px 18px}

/* flow */
.flow{display:flex;align-items:center;gap:6px;flex-wrap:wrap;background:var(--card);border:1px solid var(--line);
  border-radius:18px;padding:18px 24px;box-shadow:var(--sh-sm);margin-top:18px}
.flow .fstep{display:flex;align-items:center;gap:9px;font-size:15px;font-weight:600;padding:4px 6px}
.flow .fstep i{width:24px;height:24px;border-radius:50%;background:var(--soft);color:#0e7ea6;font-style:normal;
  font-size:12px;font-weight:800;display:flex;align-items:center;justify-content:center;flex:none}
.flow .arr{color:#c6dcea;flex:none}

/* cases */
.cases{display:grid;grid-template-columns:repeat(12,1fr);gap:16px;grid-auto-rows:320px}
.case{position:relative;border-radius:18px;overflow:hidden;border:1px solid var(--line);background:var(--card);box-shadow:var(--sh-sm);display:flex;flex-direction:column}
.case.c-a{grid-column:span 7}.case.c-b{grid-column:span 5}.case.c-c{grid-column:span 5}.case.c-d{grid-column:span 7}
.case img{width:100%;flex:1;min-height:0;object-fit:cover}
.case figcaption{padding:13px 16px;font-size:14px;color:var(--ink-2);display:flex;align-items:center;gap:8px}
.case figcaption::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);flex:none}
.case .cta-card{height:100%;display:flex;flex-direction:column;justify-content:center;gap:14px;padding:30px;
  background:linear-gradient(145deg,#eef9fe 0%,#f8fdff 70%);min-height:260px}
.case .cta-card b{font-size:18px}
.case .cta-card p{font-size:14px;color:var(--ink-2)}
.cases-note{font-size:13px;color:var(--ink-3);margin-top:14px}

/* projects list */
.proj-groups{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:20px}
.pgroup{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:var(--sh-sm)}
.pgroup b{font-size:15px;display:flex;align-items:center;gap:8px;margin-bottom:12px;color:var(--ink)}
.pgroup b svg{color:var(--sky)}
.pgroup p{font-size:13.8px;color:var(--ink-2);line-height:1.95}
.proj-line{margin-top:16px;font-size:14px;color:var(--ink-3)}

/* products */
.products{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.prod{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--sh-sm);
  transition:.25s ease;display:flex;flex-direction:column}
.prod:hover{transform:translateY(-3px);box-shadow:var(--sh-md);border-color:#cde8f4}
.prod .ptop{display:flex;align-items:center;gap:11px;margin-bottom:14px}
.prod .pic{width:38px;height:38px;border-radius:11px;background:linear-gradient(150deg,#e8f2fb,#f6fcff);
  color:var(--sky);display:flex;align-items:center;justify-content:center;flex:none}
.prod h3{font-size:16.5px;font-weight:700}
.prod .psub{font-size:12.5px;color:var(--ink-3);margin-top:1px}
.prod p{font-size:14.3px;color:var(--ink-2);line-height:1.8;flex:1}
.prod .chips{display:flex;flex-wrap:wrap;gap:7px;margin-top:14px}
.prod .chips .tag{font-size:12px;padding:4px 9px}

/* warranty */
.warranty{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:var(--sh-sm);
  overflow:hidden;display:grid;grid-template-columns:repeat(4,1fr)}
.warranty .w{padding:26px 22px;border-left:1px solid var(--line);text-align:center}
.warranty .w:first-child{border-left:0}
.warranty .w b{display:block;font-size:24px;font-weight:800;color:var(--sky);margin-bottom:6px}
.warranty .w span{font-size:13.8px;color:var(--ink-2)}
.warranty-foot{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:16px}
.warranty-foot .wf{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 18px;font-size:13.8px;color:var(--ink-2)}
.warranty-foot .wf b{color:var(--ink);font-size:14.5px;display:block;margin-bottom:4px}

/* team */
.team{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:20px}
.member{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:20px;box-shadow:var(--sh-sm)}
.member b{display:block;font-size:15.5px;margin-bottom:4px}
.member span{font-size:13px;color:var(--ink-3);line-height:1.7;display:block}
.member .role{font-size:12.5px;color:var(--sky);font-weight:600;margin-bottom:7px}

/* contact */
.contact-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:26px;align-items:stretch}
.steps{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:30px;box-shadow:var(--sh-sm)}
.step{display:flex;gap:16px;padding:15px 0;border-bottom:1px dashed var(--line)}
.step:last-child{border-bottom:0}
.step i{width:30px;height:30px;border-radius:50%;background:var(--grad);color:#fff;font-style:normal;font-size:13.5px;
  font-weight:800;display:flex;align-items:center;justify-content:center;flex:none;margin-top:2px}
.step b{display:block;font-size:15.5px}
.step span{font-size:14.2px;color:var(--ink-2)}
.qr-card{background:var(--card);border:1px solid var(--line);border-radius:22px;padding:28px;text-align:center;
  box-shadow:var(--sh-sm);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.qr-card .avatar{width:84px;height:84px;border-radius:50%;overflow:hidden;border:2px solid #e2f2fa;box-shadow:var(--sh-sm)}
.qr-box{width:100%;max-width:210px;aspect-ratio:1/1;border:1.6px dashed #b9ddf0;border-radius:16px;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;color:#8fb2c6;font-size:13px;
  background:repeating-linear-gradient(45deg,#fbfeff,#fbfeff 10px,#f4fbfe 10px,#f4fbfe 20px)}
.qr-box svg{color:#a9cde0}
.qr-card .hint{font-size:14px;color:var(--ink-2)}
.qr-card .hint b{color:var(--ink)}
.qr-card .sub{font-size:13px;color:var(--ink-3)}
.todo{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;font-weight:600;color:#a16207;
  background:#fff8e6;border:1px dashed #f0d9a0;border-radius:8px;padding:5px 10px}
.contact-info{margin-top:16px;display:grid;gap:10px;width:100%;text-align:left}
.ci{display:flex;align-items:center;gap:10px;font-size:14px;color:var(--ink-2)}
.ci svg{color:var(--sky);flex:none}
.ci b{color:var(--ink)}
.ci a{color:var(--sky);font-weight:700}

/* about */
.about-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:start}
.about p{color:var(--ink-2);font-size:15.3px;margin-bottom:14px}
.about .chips{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.about-visual{border-radius:22px;border:1px solid var(--line);background:linear-gradient(150deg,#f0f9fe,#fbfeff);
  padding:26px;box-shadow:var(--sh-sm)}
.about-visual b{font-size:15px;display:flex;gap:8px;align-items:center}
.rooms{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.rooms span{font-size:12.8px;padding:6px 12px;border-radius:999px;background:#fff;border:1px solid var(--line);color:var(--ink-2)}
.hist{margin-top:18px;display:grid;gap:10px}
.hist .h{display:flex;gap:12px;font-size:13.6px;color:var(--ink-2);line-height:1.7}
.hist .h em{font-style:normal;font-weight:800;color:var(--sky);flex:none;min-width:44px}

/* footer */
footer{border-top:1px solid var(--line);background:#fff;padding:30px 0;margin-top:10px}
.foot-row{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;font-size:14px;color:var(--ink-3)}
.foot-row .fbrand{display:flex;align-items:center;gap:9px;color:var(--ink-2);font-weight:700}
.foot-badge{font-size:11.5px;border:1px solid var(--line);border-radius:999px;padding:3px 10px;color:var(--ink-3)}
.foot-links{display:flex;gap:14px;flex-wrap:wrap}

/* reveal */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .65s cubic-bezier(.22,.61,.36,1),transform .65s cubic-bezier(.22,.61,.36,1);transition-delay:var(--d,0s)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .chip i.dot{animation:none}
  html{scroll-behavior:auto}
}

/* ---------- responsive ---------- */
@media (max-width:980px){
  .hero .wrap{grid-template-columns:1fr;gap:40px}
  .bento{grid-template-columns:repeat(2,1fr)}
  .svc,.svc.w4{grid-column:span 1}
  .svc.w6{grid-column:span 2}
  .stats,.warranty{grid-template-columns:1fr 1fr}
  .stats .st:nth-child(3),.warranty .w:nth-child(3){border-left:0}
  .stats .st,.warranty .w{border-top:1px solid var(--line)}
  .stats .st:nth-child(-n+2),.warranty .w:nth-child(-n+2){border-top:0}
  .why{grid-template-columns:1fr 1fr}
  .why .item:nth-child(3){border-left:0}
  .why .item{border-top:1px solid var(--line)}
  .why .item:nth-child(-n+2){border-top:0}
  .contact-grid,.about-grid,.tech{grid-template-columns:1fr}
  .products,.proj-groups,.warranty-foot{grid-template-columns:1fr 1fr}
  .team{grid-template-columns:1fr 1fr}
  .case.c-a,.case.c-b,.case.c-c,.case.c-d{grid-column:span 12}
  .cases{grid-auto-rows:auto}
  .case img{aspect-ratio:4/3;flex:none}
}
@media (max-width:860px){
  .navlinks{position:absolute;top:66px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:flex-start;gap:0;padding:8px 22px 14px;display:none;box-shadow:0 18px 30px -20px rgba(14,34,51,.2)}
  .navlinks.open{display:flex}
  .navlinks a{padding:12px 0;width:100%;border-bottom:1px dashed var(--line);font-size:15.5px}
  .navlinks a:last-child{border-bottom:0}
  #navToggle{display:block}
  .nav-cta .btn{display:none}
}
@media (max-width:640px){
  section{padding:54px 0}
  .hero{padding:46px 0 40px}
  .bento{grid-template-columns:1fr}
  .svc.w6{grid-column:span 1}
  .why,.products,.proj-groups,.warranty-foot,.team{grid-template-columns:1fr}
  .why .item{border-left:0}
  .stats,.warranty{grid-template-columns:1fr 1fr}
  .flow{padding:14px 16px;gap:2px}
  .flow .arr{display:none}
  .flow .fstep{width:50%;font-size:13.5px}
  .hero-actions .btn{flex:1;justify-content:center}
  .foot-row{flex-direction:column;align-items:flex-start;gap:8px}
}

/* ---------- brand film ---------- */
.slogan{display:flex;flex-wrap:wrap;align-items:baseline;gap:10px;margin:10px 0 0;font-size:15.5px;font-weight:700;color:var(--sky);letter-spacing:.06em}
.slogan span{font-size:12.4px;font-weight:600;color:var(--ink-3);letter-spacing:.14em;text-transform:uppercase}
.film-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:20px;align-items:start}
.film{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh-sm)}
.film video{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;background:#0b1a26}
.film figcaption{padding:14px 18px;font-size:13.8px;line-height:1.6;color:var(--ink-2);display:flex;gap:9px;align-items:flex-start}
.film figcaption b{color:var(--ink)}
.film figcaption::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--grad);flex:none;margin-top:8px}
@media (max-width:860px){.film-grid{grid-template-columns:1fr}}