:root{
  --navy:#08183A; --navy-2:#0E2A55; --navy-3:#153A6E;
  --blue:#1D6FE0; --blue-soft:#EAF2FD;
  --orange:#F58220; --orange-soft:#FFF3E6;
  --ink:#1B2434; --ink-2:#4C5A6E; --ink-3:#8494A8;
  --line:#E4EAF2; --bg:#FFFFFF; --bg-soft:#F6F9FC;
  --r:14px; --shadow:0 10px 30px rgba(8,24,58,.08); --shadow-lg:0 22px 48px rgba(8,24,58,.14);
  --max:1180px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{max-width:var(--max);margin:0 auto;padding:0 22px}
.sec{padding:84px 0}
.sec-head{max-width:760px;margin-bottom:44px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;letter-spacing:.16em;
  color:var(--blue);text-transform:uppercase;margin-bottom:14px}
.eyebrow::before{content:"";width:26px;height:2px;background:var(--orange);border-radius:2px}
h2{font-size:clamp(26px,3.4vw,38px);line-height:1.3;font-weight:700;letter-spacing:-.01em}
.sec-head p{margin-top:14px;color:var(--ink-2);font-size:16.5px}
.muted{color:var(--ink-2)}
.tag{display:inline-block;font-size:12.5px;padding:3px 10px;border-radius:999px;background:var(--blue-soft);
  color:var(--navy-3);font-weight:600;white-space:nowrap}

/* ---------- header ---------- */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.92);backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid transparent;transition:.25s}
header.on{border-bottom-color:var(--line);box-shadow:0 2px 14px rgba(8,24,58,.06)}
.nav{display:flex;align-items:center;gap:26px;height:72px}
.brand{display:flex;align-items:center;gap:13px;margin-right:auto}
.brand img{height:54px;width:auto;display:block}
.brand .btxt{border-left:1px solid var(--line);padding-left:14px;line-height:1.35}
.brand .btxt b{font-size:15px;font-weight:700;color:var(--navy);letter-spacing:.01em;display:block}
.brand .btxt span{font-size:11.5px;color:var(--ink-3);letter-spacing:.05em;display:block;font-weight:500}
.menu{display:flex;gap:4px}
.menu a{padding:9px 13px;border-radius:8px;font-size:15px;color:var(--ink-2);font-weight:500;transition:.18s}
.menu a:hover{color:var(--navy);background:var(--bg-soft)}
.menu a.act{color:var(--blue);background:var(--blue-soft)}
.tel{display:flex;align-items:center;gap:9px;background:var(--navy);color:#fff;padding:10px 18px;border-radius:999px;
  font-weight:600;font-size:15px;transition:.2s;white-space:nowrap}
.tel:hover{background:var(--blue);transform:translateY(-1px)}
.tel i{width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 3px rgba(245,130,32,.28)}
.burger{display:none;width:42px;height:42px;border:1px solid var(--line);border-radius:10px;background:#fff;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:4px}
.burger s{display:block;width:17px;height:2px;background:var(--navy);border-radius:2px;transition:.25s}

/* ---------- hero ---------- */
.hero{position:relative;background:
  radial-gradient(1100px 520px at 84% -8%, rgba(29,111,224,.30), transparent 60%),
  radial-gradient(760px 420px at 8% 108%, rgba(245,130,32,.16), transparent 62%),
  linear-gradient(158deg,#061431 0%,var(--navy-2) 52%,#0B2148 100%);
  color:#fff;padding:96px 0 108px;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;pointer-events:none;opacity:.5;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:52px 52px;mask-image:radial-gradient(80% 70% at 50% 35%,#000,transparent)}
.hero .wrap{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:52px;align-items:center}
.hbadge{display:inline-flex;align-items:center;gap:9px;border:1px solid rgba(255,255,255,.26);
  background:rgba(255,255,255,.08);padding:7px 15px;border-radius:999px;font-size:13.5px;margin-bottom:24px}
.hbadge em{font-style:normal;color:var(--orange);font-weight:700}
.hero h1{font-size:clamp(30px,4.6vw,52px);line-height:1.22;font-weight:700;letter-spacing:-.02em}
.hero h1 em{font-style:normal;color:var(--orange)}
.hero .lead{margin:22px 0 0;font-size:17.5px;color:rgba(255,255,255,.82);max-width:560px}
.hero .sub{margin-top:10px;font-size:14.5px;color:rgba(255,255,255,.6);letter-spacing:.03em}
.cta{display:flex;gap:14px;margin-top:34px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:15px 30px;border-radius:999px;
  font-weight:700;font-size:16px;transition:.22s;white-space:nowrap}
.btn-p{background:var(--orange);color:#1A1206;box-shadow:0 12px 26px rgba(245,130,32,.32)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 16px 32px rgba(245,130,32,.4)}
.btn-g{border:1px solid rgba(255,255,255,.34);color:#fff;background:rgba(255,255,255,.06)}
.btn-g:hover{background:rgba(255,255,255,.14);border-color:#fff}
.trust{display:flex;gap:10px;flex-wrap:wrap;margin-top:30px}
.trust span{font-size:13px;color:rgba(255,255,255,.78);border:1px dashed rgba(255,255,255,.28);
  padding:5px 13px;border-radius:8px}
/* hero panel */
.panel{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.15);border-radius:20px;padding:28px;
  backdrop-filter:blur(6px)}
.panel h4{font-size:15px;font-weight:600;color:rgba(255,255,255,.72);margin-bottom:20px;letter-spacing:.06em}
.stats{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.stat b{display:block;font-size:clamp(30px,3.4vw,40px);font-weight:800;line-height:1;letter-spacing:-.02em}
.stat b i{font-style:normal;font-size:.55em;color:var(--orange);margin-left:2px}
.stat span{display:block;margin-top:8px;font-size:13.5px;color:rgba(255,255,255,.66)}
.panel .note{margin-top:22px;padding-top:18px;border-top:1px solid rgba(255,255,255,.14);
  font-size:13px;color:rgba(255,255,255,.6);display:flex;gap:8px;align-items:flex-start}
.panel .note b{color:var(--orange);font-weight:700}

/* ---------- business ---------- */
.grid{display:grid;gap:20px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.biz{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;position:relative;
  transition:.28s;display:flex;flex-direction:column}
.biz:hover{transform:translateY(-4px);border-color:#CFDDF0;box-shadow:var(--shadow-lg)}
.biz-img{position:relative;aspect-ratio:4/3;overflow:hidden;background:var(--blue-soft);flex:none}
.biz-img img{width:100%;height:100%;object-fit:cover;display:block;transition:.5s}
.biz:hover .biz-img img{transform:scale(1.045)}
.biz-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,24,58,0) 52%,rgba(8,24,58,.42));
  pointer-events:none}
.biz-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.biz h3{font-size:18.5px;font-weight:700;margin-bottom:7px}
.biz .one{font-size:14px;color:var(--blue);font-weight:600;margin-bottom:14px}
.biz .tags{display:flex;flex-wrap:wrap;gap:7px;margin-bottom:15px}
.biz .sc{font-size:13px;color:var(--ink-3);line-height:1.85;margin-top:auto}
.biz .sc b{color:var(--ink-2);font-weight:600}

/* ---------- architecture ---------- */
.arch{background:var(--bg-soft);border:1px solid var(--line);border-radius:20px;padding:38px}
.arch-layers{display:grid;grid-template-columns:1fr 46px 1fr 46px 1fr;align-items:stretch;gap:0}
.layer{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:22px}
.layer h5{font-size:14px;font-weight:700;color:var(--navy);letter-spacing:.05em;margin-bottom:4px}
.layer .en{font-size:11.5px;color:var(--ink-3);margin-bottom:16px;letter-spacing:.04em}
.layer ul li{font-size:13.5px;color:var(--ink-2);padding:7px 0 7px 15px;border-bottom:1px dashed var(--line);position:relative}
.layer ul li:last-child{border-bottom:0}
.layer ul li::before{content:"";position:absolute;left:0;top:15px;width:5px;height:5px;border-radius:50%;background:var(--blue)}
.arrows{display:flex;align-items:center;justify-content:center}
.arrows svg{width:24px;height:24px;stroke:var(--orange);fill:none;stroke-width:2}
.arch-note{margin-top:22px;font-size:13.5px;color:var(--ink-2);background:#fff;border-left:3px solid var(--orange);
  padding:13px 18px;border-radius:0 8px 8px 0}

/* ---------- cases ---------- */
.case{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;margin-bottom:22px;transition:.28s}
.case:hover{box-shadow:var(--shadow-lg);border-color:#CFDDF0}
.case-img{aspect-ratio:21/9;overflow:hidden;background:var(--navy);position:relative}
.case-img img{width:100%;height:100%;object-fit:cover;display:block;transition:.6s}
.case:hover .case-img img{transform:scale(1.035)}
.case-img::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,20,49,.62),rgba(6,20,49,.05))}
.case-inner{padding:26px 30px 30px}
@media(max-width:900px){.case-inner{padding:22px}.case-img{aspect-ratio:16/9}}
.case-top{display:flex;flex-wrap:wrap;gap:14px;align-items:flex-start;justify-content:space-between;margin-bottom:22px}
.case-id{font-size:12px;font-weight:700;letter-spacing:.16em;color:var(--orange);margin-bottom:7px}
.case h3{font-size:21px;font-weight:700}
.case-meta{display:flex;gap:9px;flex-wrap:wrap}
.case-meta span{font-size:12.5px;background:var(--navy);color:#fff;padding:5px 12px;border-radius:7px;font-weight:500}
.case-grid{display:grid;grid-template-columns:1.15fr 1.15fr .7fr 1fr;gap:26px}
.cblk h6{font-size:13px;font-weight:700;color:var(--navy-3);letter-spacing:.05em;margin-bottom:9px;
  padding-bottom:7px;border-bottom:2px solid var(--blue-soft)}
.cblk p,.cblk li{font-size:14px;color:var(--ink-2);line-height:1.8}
.cblk ul li{padding-left:16px;position:relative;margin-bottom:5px}
.cblk ul li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:2px;background:var(--orange);border-radius:2px}
.cblk.eff ul li::before{width:6px;height:6px;border-radius:50%;background:var(--blue)}

/* ---------- process ---------- */
.proc{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;counter-reset:p}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px 18px 22px;transition:.25s}
.step:hover{border-color:var(--blue);transform:translateY(-3px);box-shadow:var(--shadow)}
.step .no{width:34px;height:34px;border-radius:10px;background:var(--navy);color:#fff;font-weight:700;font-size:15px;
  display:flex;align-items:center;justify-content:center;margin-bottom:14px}
.step:nth-child(even) .no{background:var(--orange);color:#1A1206}
.step h4{font-size:16px;font-weight:700;margin-bottom:5px}
.step p{font-size:13px;color:var(--ink-3)}

/* ---------- strengths ---------- */
.str{background:linear-gradient(160deg,var(--navy),var(--navy-3));border-radius:18px;padding:30px 26px;color:#fff;position:relative;overflow:hidden}
.str::after{content:"";position:absolute;right:-40px;top:-40px;width:130px;height:130px;border-radius:50%;
  background:radial-gradient(circle,rgba(245,130,32,.34),transparent 70%)}
.str b{display:block;font-size:19px;font-weight:700;margin-bottom:10px;position:relative;z-index:2}
.str p{font-size:14.5px;color:rgba(255,255,255,.8);position:relative;z-index:2}
.str .bar{width:34px;height:3px;background:var(--orange);border-radius:3px;margin-bottom:16px}

/* ---------- brands ---------- */
.brands{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.br{background:#fff;border:1px solid var(--line);border-radius:var(--r);height:104px;display:flex;flex-direction:column;
  align-items:center;justify-content:center;gap:6px;padding:14px;transition:.25s}
.br:hover{border-color:var(--blue);box-shadow:var(--shadow);transform:translateY(-3px)}
/* logo 素材已裁掉透明/白色留白，这里统一按高度出图，宽度按比例，
   只对超长字标做宽度兜底，避免再次出现视觉大小不一致 */
.br img{height:36px;width:auto;max-width:230px;object-fit:contain;filter:saturate(.92)}
.br span{font-size:11.5px;color:var(--ink-3)}
.brands-note{margin-top:20px;font-size:14px;color:var(--ink-2);text-align:center}

/* ---------- qualification ---------- */
.qual{display:grid;grid-template-columns:400px 1fr;gap:40px;align-items:center;background:var(--bg-soft);
  border:1px solid var(--line);border-radius:20px;padding:38px}
.qual-img{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:18px;box-shadow:var(--shadow)}
.qual-img figcaption{font-size:12.5px;color:var(--ink-3);text-align:center;margin-top:12px}
.qual-list li{display:flex;gap:14px;padding:14px 0;border-bottom:1px dashed var(--line);font-size:15px;color:var(--ink-2)}
.qual-list li:last-child{border-bottom:0}
.qual-list .k{color:var(--navy);font-weight:700;min-width:104px}
.warn{margin-top:18px;background:var(--orange-soft);border:1px solid #FBD6AE;border-radius:10px;padding:13px 16px;
  font-size:13.5px;color:#8A4C08;display:flex;gap:9px}
.warn b{color:#6B3905}

/* ---------- contact ---------- */
.contact{background:linear-gradient(158deg,#061431,var(--navy-2));color:#fff;border-radius:22px;padding:46px;
  display:grid;grid-template-columns:1fr 330px;gap:40px;align-items:center;position:relative;overflow:hidden}
.contact::before{content:"";position:absolute;inset:0;opacity:.35;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(70% 70% at 20% 30%,#000,transparent)}
.contact>*{position:relative;z-index:2}
.contact h2{font-size:30px;margin-bottom:10px}
.contact .cl{color:rgba(255,255,255,.78);font-size:16px;margin-bottom:28px}
.cinfo{display:grid;grid-template-columns:1fr 1fr;gap:20px 26px}
.cinfo div span{display:block;font-size:12.5px;color:rgba(255,255,255,.5);letter-spacing:.08em;margin-bottom:5px}
.cinfo div b{font-size:16.5px;font-weight:600;color:#fff}
.cinfo div b.acc{color:var(--orange);font-size:23px;letter-spacing:.01em}
.qr{background:#fff;border-radius:16px;padding:20px;text-align:center;color:var(--ink)}
.qr img{width:158px;height:158px;margin:0 auto 12px;object-fit:contain}
.qr b{font-size:15px;display:block;margin-bottom:4px}
.qr p{font-size:12.5px;color:var(--ink-3);line-height:1.6}

/* ---------- footer ---------- */
footer{background:#04101F;color:rgba(255,255,255,.62);padding:44px 0 26px;font-size:14px}
.f-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:36px;padding-bottom:30px;border-bottom:1px solid rgba(255,255,255,.1)}
.f-grid h5{color:#fff;font-size:15px;margin-bottom:14px;font-weight:600}
.f-grid a,.f-grid li{display:block;padding:4px 0;color:rgba(255,255,255,.6);font-size:13.5px}
.f-grid a:hover{color:var(--orange)}
.f-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.f-logo img{height:58px;width:auto;background:#fff;padding:8px;border-radius:9px}
.f-logo b{color:#fff;font-size:15.5px}
.f-bot{padding-top:22px;font-size:12.5px;color:rgba(255,255,255,.4);display:flex;justify-content:space-between;
  gap:14px;flex-wrap:wrap;align-items:center}
.f-bot a{color:rgba(255,255,255,.5)}
.f-bot a:hover{color:var(--orange)}

/* ---------- mobile bar ---------- */
.mbar{display:none;position:fixed;left:0;right:0;bottom:0;z-index:70;background:#fff;border-top:1px solid var(--line);
  padding:10px 14px;gap:10px;box-shadow:0 -4px 18px rgba(8,24,58,.1)}
.mbar a{flex:1;text-align:center;padding:12px;border-radius:10px;font-weight:700;font-size:15px}
.mbar .m1{background:var(--orange);color:#1A1206}
.mbar .m2{background:var(--blue-soft);color:var(--navy)}

/* ---------- reveal ---------- */
.rv{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

/* ---------- responsive ---------- */
@media(max-width:1080px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .case-grid{grid-template-columns:1fr 1fr}
  .arch-layers{grid-template-columns:1fr}
  .arrows{transform:rotate(90deg);height:34px}
  .brands{grid-template-columns:repeat(4,1fr)}
  .proc{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:900px){
  .menu{position:fixed;inset:72px 0 auto 0;background:#fff;flex-direction:column;padding:12px 20px 22px;
    border-bottom:1px solid var(--line);box-shadow:var(--shadow);display:none}
  .menu.open{display:flex}
  .menu a{padding:13px 12px;font-size:16px;border-bottom:1px solid var(--bg-soft)}
  .burger{display:flex}
  .tel{display:none}
  .hero{padding:60px 0 72px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .sec{padding:60px 0}
  .qual,.contact{grid-template-columns:1fr}
  .g3{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr 1fr}
  .mbar{display:flex}
  body{padding-bottom:74px}
  .brands{grid-template-columns:repeat(3,1fr)}
}
@media(max-width:600px){
  .g4,.case-grid,.cinfo,.proc,.stats{grid-template-columns:1fr}
  .brands{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:29px}
  .cta{flex-direction:column}
  .btn{width:100%}
  .f-grid{grid-template-columns:1fr}
  .arch,.qual,.contact,.panel{padding:24px}
  .brand .btxt{display:none}
  .brand{margin-right:0}
}