:root{
  --p1:#495677; --p1l:#5a6b8a;
  --a1:#007cc3; --a1l:#0099e6;
  --bg:#fafafa; --bw:#ffffff;
  --td:#1a1a1a; --tm:#555; --tl:#666;
  --bs:rgba(73,86,119,0.06);
  --fs:Inter,Noto Sans SC,sans-serif;
  --fe:Noto Serif SC,Georgia,serif;
  --r:12px;
}
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--fs);background:var(--bw);color:var(--td);overflow-x:hidden}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.reveal{opacity:0;transform:translateY(24px);transition:all 0.9s cubic-bezier(0.16,1,0.3,1)}
.reveal.visible{opacity:1;transform:translateY(0)}
.d1{transition-delay:0.12s}.d2{transition-delay:0.24s}.d3{transition-delay:0.36s}.d4{transition-delay:0.48s}

/* ===== Nav ===== */
.navbar{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  padding:0 40px;height:68px;
  display:flex;align-items:center;justify-content:space-between;
  background:var(--bw);border-bottom:1px solid var(--bs);
  transition:all 0.3s;
}
.navbar.scrolled{box-shadow:0 2px 16px rgba(0,0,0,0.03)}
.nav-logo{display:flex;align-items:center;gap:8px}
.nav-logo img{height:45px;width:auto}
.nav-links{display:flex;gap:28px;align-items:center}
.nav-links a{font-size:13px;font-weight:500;color:var(--tm);transition:color 0.2s}
.nav-links a:hover{color:var(--p1)}
.nav-cta{
  display:inline-flex;align-items:center;gap:6px;
  padding:7px 22px;border-radius:6px;
  background:var(--p1);color:#fff!important;font-size:13px;font-weight:500;
  transition:all 0.3s;
}
.nav-cta:hover{background:var(--p1l)!important;transform:translateY(-1px)}
.nav-toggle{display:none;flex-direction:column;gap:5px;cursor:pointer;padding:4px;z-index:1001}
.nav-toggle span{width:22px;height:1.5px;background:var(--td);transition:0.3s}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
.nav-links.open{display:flex!important;position:fixed;inset:0;background:var(--bw);flex-direction:column;justify-content:center;align-items:center;gap:40px;z-index:1000}
.nav-links.open a{font-size:20px;font-weight:500}

/* ===== Hero ===== */
.hero{
  min-height:100vh;display:flex;align-items:center;
  background:var(--bw);position:relative;
}
.hero-g{
  width:100%;max-width:1200px;margin:0 auto;padding:140px 40px 80px;
  display:grid;grid-template-columns:1.1fr 1fr;gap:80px;align-items:center;
}
.hero-t1{font-size:11px;font-weight:500;letter-spacing:4px;color:var(--tl);display:block;margin-bottom:20px}
.hero h1{font-size:clamp(36px,4.5vw,60px);font-weight:800;letter-spacing:-0.03em;color:var(--td);line-height:1.05;margin-bottom:20px}
.hero h1 .hl{color:var(--a1)}
.hero-sub{font-size:15px;color:var(--tm);line-height:1.8;max-width:440px;margin-bottom:32px}
.hero-bts{display:flex;gap:12px}
.btn-p{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 30px;background:var(--p1);color:#fff;border-radius:6px;
  font-weight:500;font-size:14px;border:none;cursor:pointer;transition:all 0.3s;
}
.btn-p:hover{background:var(--p1l);transform:translateY(-2px);box-shadow:0 10px 24px rgba(30,30,42,0.12)}
.btn-o{
  display:inline-flex;align-items:center;gap:8px;
  padding:13px 30px;background:transparent;color:var(--td);border-radius:6px;
  font-weight:400;font-size:14px;border:1px solid var(--bs);cursor:pointer;transition:all 0.3s;
}
.btn-o:hover{border-color:var(--a1);color:var(--a1)}
.hv{display:flex;align-items:center;justify-content:center}
.hv img{width:100%;height:100%;object-fit:cover;border-radius:8px;box-shadow:0 20px 60px rgba(0,0,0,0.03)}

/* ===== Section Base ===== */
section{padding:120px 0;position:relative}
.w{max-width:1200px;margin:0 auto;padding:0 40px}
.st{font-size:11px;font-weight:500;letter-spacing:3px;color:var(--tl);margin-bottom:14px;text-transform:uppercase}
.stt{font-size:clamp(26px,3vw,40px);font-weight:700;margin-bottom:14px;line-height:1.15;letter-spacing:-0.02em}
.sd{font-size:15px;color:var(--tm);line-height:1.75;max-width:500px}
.sc{text-align:center}.sc .sd{margin:0 auto}

/* ===== Story ===== */
.story{background:var(--bw)}
.sg{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px;margin-top:56px}
.scard{border:1px solid var(--bs);border-radius:var(--r);padding:44px 32px;background:var(--bw);transition:all 0.3s}
.scard:hover{box-shadow:0 8px 24px rgba(0,0,0,0.02);border-color:rgba(73,86,119,0.15)}
.scard .sn{font-size:36px;font-weight:700;color:var(--a1);opacity:0.08;position:absolute;top:12px;right:20px}
.scard h3{font-size:17px;font-weight:700;margin-bottom:4px}
.scard .ss{font-size:12px;color:var(--a1);font-weight:500;margin-bottom:14px;letter-spacing:1px}
.scard p{font-size:14px;color:var(--tm);line-height:1.8}
.scard .sm{display:inline-flex;align-items:center;gap:4px;margin-top:16px;font-size:12px;font-weight:500;color:var(--tl);transition:color 0.2s}
.scard:hover .sm{color:var(--a1)}

/* ===== Pillars ===== */
.pillars{background:var(--bg);padding-bottom:150px}
.pg{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:56px}
.pc{
  background:var(--bw);border-radius:var(--r);padding:28px 22px;
  border:1px solid var(--bs);transition:all 0.3s;
}
.pc:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,0.02)}
.pc .pi{width:38px;height:38px;border-radius:8px;display:flex;align-items:center;justify-content:center;margin-bottom:12px;background:var(--bg);color:var(--p1)}
.pc h3{font-size:14px;font-weight:700;margin-bottom:6px}
.pc .ps{font-size:12px;color:var(--tm);line-height:1.6;margin-bottom:12px}
.pc .pv{display:flex;gap:16px;margin-bottom:12px;padding-top:10px;border-top:1px solid var(--bs)}
.pc .pv .pn{font-size:18px;font-weight:700;color:var(--p1)}
.pc .pv .pl{font-size:10px;color:var(--tl);margin-top:1px;letter-spacing:0.3px}
.pc .pt{display:flex;flex-wrap:wrap;gap:3px}
.pc .pt span{font-size:10px;padding:2px 8px;border-radius:8px;background:var(--bg);color:var(--tm);border:1px solid var(--bs)}

/* ===== Flow ===== */
.flow-sec{padding:100px 0}
.flow-sec.alt{background:var(--bg)}
.flow-g{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.flow-g .flow-img{border-radius:var(--r);overflow:hidden;max-height:500px;display:flex;align-items:center}
.flow-g .flow-img img{width:100%;height:auto}
.flow-g.rev{direction:rtl}.flow-g.rev>*{direction:ltr}
.flow-g .flow-t h3{font-size:clamp(20px,2.2vw,30px);font-weight:700;margin-bottom:12px;line-height:1.2}
.flow-g .flow-t p{font-size:14px;color:var(--tm);line-height:1.8;margin-bottom:16px}
.flow-g .flow-t .fs{display:flex;gap:28px;margin-top:20px}
.flow-g .flow-t .fs .fn{font-size:26px;font-weight:700;color:var(--a1)}
.flow-g .flow-t .fs .fl{font-size:11px;color:var(--tl);margin-top:1px}
.flow-g .flow-t .more{display:inline-flex;align-items:center;gap:4px;margin-top:16px;font-size:13px;font-weight:500;color:var(--a1);transition:gap 0.2s}
.flow-g .flow-t .more:hover{gap:8px}

/* ===== Products ===== */
.products{background:var(--bg);padding:120px 0}
.pg4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:56px}
.pcd{background:var(--bw);border-radius:var(--r);padding:28px 22px;border:1px solid var(--bs);transition:all 0.3s}
.pcd:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,0.02)}
.pcd h3{font-size:14px;font-weight:700;margin-bottom:2px}
.pcd .ps{font-size:11px;color:var(--a1);font-weight:500;margin-bottom:10px}
.pcd p{font-size:12px;color:var(--tm);line-height:1.7;margin-bottom:12px}
.pcd .pt{display:flex;flex-wrap:wrap;gap:3px}
.pcd .pt span{font-size:9px;padding:2px 7px;border-radius:8px;background:var(--bg);color:var(--tm);border:1px solid var(--bs)}

/* ===== Service ===== */
.service{background:var(--bw)}
.s2{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-top:56px}
.s2c{background:var(--bg);border-radius:var(--r);padding:40px 32px;border:1px solid var(--bs)}
.s2c h3{font-size:16px;font-weight:700;margin-bottom:2px}
.s2c .s2s{font-size:11px;color:var(--a1);font-weight:500;margin-bottom:16px}
.s2c .s2i{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.s2c .si{background:var(--bw);border-radius:6px;padding:10px 14px;border:1px solid var(--bs);font-size:12px;color:var(--tm);display:flex;align-items:center;gap:8px}
.s2c .si .dot{width:4px;height:4px;border-radius:50%;background:var(--a1);flex-shrink:0}

/* ===== Cases ===== */
.cases{background:var(--bg);padding:120px 0 140px}
.cg{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:56px}
.cc{border-radius:var(--r);overflow:hidden;border:1px solid var(--bs);background:var(--bw);transition:all 0.3s}
.cc:hover{transform:translateY(-4px);box-shadow:0 12px 32px rgba(0,0,0,0.02)}
.cc-tp{height:120px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;position:relative}
.cc-tp .ci{position:relative;z-index:1;color:#fff;opacity:0.9}
.cc-tp .cl{font-size:10px;font-weight:500;letter-spacing:2px;text-transform:uppercase;opacity:0.6;position:relative;z-index:1;color:#fff}
.cc-tp.c1{background:#1e1e2a}
.cc-tp.c2{background:#1e1e2a}
.cc-tp.c3{background:linear-gradient(135deg,#1e1e2a,#2e2e3a)}
.cc-tp.c4{background:linear-gradient(135deg,#1e1e2a,#2e2e3a)}
.cc-bd{padding:18px 20px}
.cc-bd h4{font-size:13px;font-weight:700;margin-bottom:4px}
.cc-bd p{font-size:12px;color:var(--tl);line-height:1.65}
.cc-bd .cs{font-size:11px;font-weight:600;color:var(--a1);margin-top:8px}

/* ===== CTA ===== */
.cta-s{padding:100px 0;background:var(--p1);position:relative}
.cta-i{max-width:540px;margin:0 auto;padding:0 40px;text-align:center;position:relative;z-index:1}
.cta-i h2{font-size:clamp(24px,2.6vw,34px);color:#fff;font-weight:700;margin-bottom:10px;letter-spacing:-0.02em}
.cta-i p{color:rgba(255,255,255,0.45);font-size:14px;margin-bottom:32px;line-height:1.7}
.cta-b{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.cta-s .btn-p{background:#fff;color:var(--p1)}.cta-s .btn-p:hover{background:#eee;box-shadow:0 10px 24px rgba(255,255,255,0.1)}
.cta-s .btn-o{color:#fff;border-color:rgba(255,255,255,0.15)}.cta-s .btn-o:hover{border-color:var(--a1);color:var(--a1);background:rgba(255,255,255,0.03)}

/* ===== Mid CTA ===== */
.cta-m{padding:100px 0;background:var(--bw);border-top:1px solid var(--bs);border-bottom:1px solid var(--bs);text-align:center}
.cta-m h2{font-size:clamp(24px,2.8vw,36px);font-weight:700;margin-bottom:12px}
.cta-m p{font-size:14px;color:var(--tm);line-height:1.7;margin-bottom:28px}

/* ===== Footer ===== */
.foot{background:var(--bw);border-top:1px solid var(--bs);padding:56px 40px 24px}
.fg{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:36px}
.fb{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;color:var(--td);margin-bottom:10px}
.fb img{height:26px;width:auto}
.fc h4{font-size:11px;font-weight:500;color:var(--tl);margin-bottom:14px;letter-spacing:2px;text-transform:uppercase}
.fc a{display:block;font-size:13px;color:var(--tm);padding:3px 0;transition:color 0.2s}
.fc a:hover{color:var(--a1)}
.fb2{max-width:1200px;margin:0 auto;padding-top:16px;border-top:1px solid var(--bs);display:flex;justify-content:space-between;font-size:11px;color:var(--tl)}

@media(max-width:1024px){
  .hero-g{grid-template-columns:1fr;gap:48px;text-align:center}
  .hero-sub,.hero-bts{margin-left:auto;margin-right:auto}
  .hero-bts{justify-content:center}
  .hv img{max-width:360px;margin:0 auto}
  .flow-g{grid-template-columns:1fr;gap:40px}
  .sg{grid-template-columns:1fr 1fr}
  .pg,.pg4,.cg{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-toggle{display:flex}
  section{padding:80px 0}
  .sg,.pg,.pg4,.cg,.s2{grid-template-columns:1fr}
  .s2 .s2i{grid-template-columns:1fr}
  .fg{grid-template-columns:1fr 1fr}
  .hero-g{padding:120px 24px 60px}
  .story .sg{margin-top:32px}
  .pillars .pg,.products .pg4,.cases .cg{margin-top:32px}
}
@media(max-width:480px){.fg{grid-template-columns:1fr}}

/* ===== Modal ===== */
.md-over{display:none;position:fixed;top:0;left:0;right:0;bottom:0;z-index:9999;background:rgba(0,0,0,0.45);overflow-y:auto;padding:40px 20px}
.md-over.show{display:block}
.md-box{display:none;max-width:680px;margin:40px auto;background:#ffffff;border-radius:12px;padding:48px 52px;position:relative;box-shadow:0 24px 64px rgba(0,0,0,0.1)}
.md-box.show{display:block}
.md-x{position:absolute;top:16px;right:20px;border:none;background:none;cursor:pointer;font-size:18px;color:var(--tl);width:28px;height:28px;border-radius:50%;display:flex;align-items:center;justify-content:center}
.md-x:hover{background:var(--bg);color:var(--td)}
.md-box .st{font-size:10px;font-weight:500;letter-spacing:4px;color:var(--a1);margin-bottom:20px;text-transform:uppercase}
.md-box h2{font-size:clamp(22px,2.8vw,34px);font-weight:400;letter-spacing:0.04em;color:var(--p1);margin-bottom:24px;font-family:var(--fe);line-height:1.2}
.md-box .ld{font-size:14px;color:var(--tm);line-height:1.75;margin-bottom:36px;font-style:italic;border-left:2px solid var(--a1);padding-left:18px}
.md-box p{font-size:13px;color:var(--tm);line-height:2;margin-bottom:16px}
.md-box .tk{font-size:13px;color:var(--p1);font-weight:500;line-height:1.6;padding:16px 20px;background:var(--bg);border-radius:4px;margin:24px 0;border-left:3px solid var(--p1)}
.md-box .hr{border:none;border-top:1px solid var(--bs);margin:36px 0}
.md-box .sh{font-size:16px;font-weight:400;color:var(--p1);margin-bottom:8px;letter-spacing:0.02em;font-family:var(--fe)}
.md-box .cta{margin-top:36px;padding-top:24px;border-top:1px solid var(--bs)}
@keyframes mdFade{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
@media(max-width:600px){.md-box{padding:36px 24px;margin:20px auto}}
/* 线条纹理 */
.md-see{background-image:repeating-linear-gradient(90deg,rgba(73,86,119,0.02) 0,rgba(73,86,119,0.02) 1px,transparent 1px,transparent 48px)}
.md-build{background-image:repeating-linear-gradient(0deg,rgba(73,86,119,0.015) 0,rgba(73,86,119,0.015) 1px,transparent 1px,transparent 48px)}
.md-empower{background-image:repeating-linear-gradient(90deg,rgba(73,86,119,0.015) 0,rgba(73,86,119,0.015) 1px,transparent 1px,transparent 48px),repeating-linear-gradient(0deg,rgba(73,86,119,0.01) 0,rgba(73,86,119,0.01) 1px,transparent 1px,transparent 48px)}
@media(max-width:600px){.md-box{padding:36px 24px;margin:20px auto}}

/* ===== Story Modal 线条纹理 ===== */
.md-see{background-image:repeating-linear-gradient(90deg,rgba(73,86,119,0.02) 0,rgba(73,86,119,0.02) 1px,transparent 1px,transparent 48px)}
.md-build{background-image:repeating-linear-gradient(0deg,rgba(73,86,119,0.015) 0,rgba(73,86,119,0.015) 1px,transparent 1px,transparent 48px)}

/* ===== Footer ===== */
.foot{background:var(--bw);border-top:1px solid var(--bs);padding:56px 40px 24px}
.fg{max-width:1200px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:48px;margin-bottom:36px}
.fb{display:flex;align-items:center;gap:10px;font-size:15px;font-weight:600;color:var(--td);margin-bottom:10px}
.fb img{height:26px;width:auto}
.fc h4{font-size:11px;font-weight:500;color:var(--tl);margin-bottom:14px;letter-spacing:2px;text-transform:uppercase}
.fc a{display:block;font-size:13px;color:var(--tm);padding:3px 0;transition:color 0.2s}
.fc a:hover{color:var(--a1)}
.ft{max-width:1200px;margin:0 auto;padding-top:16px;border-top:1px solid var(--bs);display:flex;justify-content:space-between;font-size:11px;color:var(--tl)}
@media(max-width:480px){.fg{grid-template-columns:1fr}}