:root{
  --navy:#0b1f3a;
  --navy2:#122d52;
  --blue:#2563eb;
  --cyan:#06b6d4;
  --accent:#38bdf8;
  --text:#1e293b;
  --muted:#64748b;
  --bg:#f6f9fc;
  --white:#ffffff;
  --radius:16px;
  --shadow:0 10px 30px rgba(11,31,58,.10);
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{font-family:"PingFang SC","Microsoft YaHei","Segoe UI",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;}
a{text-decoration:none;color:inherit;}
.container{width:min(1180px,92%);margin:0 auto;}

/* ===== 顶部导航 ===== */
header{position:sticky;top:0;z-index:100;background:rgba(11,31,58,.92);backdrop-filter:blur(10px);}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px;}
.logo{display:flex;align-items:center;gap:12px;color:#fff;}
.logo-mark{width:52px;height:44px;display:flex;align-items:center;justify-content:center;flex:none;}
.logo-mark img{width:100%;height:100%;object-fit:contain;display:block;}
.logo-text strong{font-size:17px;display:block;line-height:1.2;}
.logo-text span{font-size:10.5px;color:#9db4d6;letter-spacing:1.5px;}
nav ul{display:flex;gap:6px;list-style:none;}
nav a{color:#d6e2f5;font-size:14.5px;padding:8px 12px;border-radius:8px;transition:.25s;white-space:nowrap;}
nav a:hover{color:#fff;background:rgba(255,255,255,.12);}
nav a.active{color:#fff;background:rgba(56,189,248,.22);}
.nav-cta{background:linear-gradient(135deg,var(--blue),var(--cyan)) !important;color:#fff !important;padding:10px 18px;border-radius:10px;font-weight:600;}
.nav-cta:hover{filter:brightness(1.1) !important;}
.menu-btn{display:none;background:none;border:1px solid rgba(255,255,255,.3);color:#fff;font-size:20px;padding:6px 12px;border-radius:8px;cursor:pointer;}

/* ===== 首页 Hero ===== */
.hero{position:relative;background:radial-gradient(1200px 600px at 80% -10%,rgba(56,189,248,.25),transparent 60%),linear-gradient(160deg,var(--navy) 0%,var(--navy2) 60%,#0e3a6b 100%);color:#fff;padding:100px 0 120px;overflow:hidden;}
.hero::before{content:"";position:absolute;inset:0;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:44px 44px;pointer-events:none;}
.hero-inner{position:relative;max-width:860px;}
.hero .tag{display:inline-block;background:rgba(56,189,248,.15);border:1px solid rgba(56,189,248,.4);color:var(--accent);padding:6px 16px;border-radius:999px;font-size:13px;letter-spacing:2px;margin-bottom:22px;}
.hero h1{font-size:clamp(30px,4.4vw,52px);line-height:1.25;font-weight:800;margin-bottom:18px;}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--accent),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;}
.hero p{color:#b9cbeb;font-size:17px;max-width:640px;margin-bottom:34px;}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;padding:13px 28px;border-radius:12px;font-weight:600;font-size:15px;transition:.25s;}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 8px 24px rgba(37,99,235,.4);}
.btn-primary:hover{transform:translateY(-2px);}
.btn-ghost{border:1px solid rgba(255,255,255,.35);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.1);}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:46px;max-width:760px;}
.stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.12);border-radius:14px;padding:16px 10px;text-align:center;}
.stat b{display:block;font-size:26px;color:var(--accent);}
.stat span{font-size:12.5px;color:#9db4d6;}

/* ===== 内页 Banner ===== */
.page-hero{position:relative;background:radial-gradient(900px 400px at 85% -20%,rgba(56,189,248,.25),transparent 60%),linear-gradient(160deg,var(--navy) 0%,var(--navy2) 70%,#0e3a6b 100%);color:#fff;padding:64px 0 58px;overflow:hidden;}
.page-hero::before{content:"";position:absolute;inset:0;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:44px 44px;pointer-events:none;}
.page-hero .kicker{color:var(--accent);font-weight:700;letter-spacing:3px;font-size:13px;text-transform:uppercase;position:relative;}
.page-hero h1{position:relative;font-size:clamp(26px,3.4vw,40px);margin:10px 0 12px;}
.page-hero p{position:relative;color:#b9cbeb;max-width:720px;font-size:15.5px;}

/* ===== 通用 section ===== */
section{padding:80px 0;}
.sec-head{text-align:center;max-width:760px;margin:0 auto 54px;}
.sec-head .kicker{color:var(--blue);font-weight:700;letter-spacing:3px;font-size:13px;text-transform:uppercase;}
.sec-head h2{font-size:clamp(26px,3vw,36px);margin:10px 0 14px;color:var(--navy);}
.sec-head p{color:var(--muted);}

/* ===== 关于 ===== */
.about-top{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center;margin-bottom:54px;}
.about-top h3{font-size:20px;color:var(--navy);margin-bottom:14px;}
.about-top p{color:var(--muted);font-size:15px;margin-bottom:12px;}
.about-panel{background:linear-gradient(160deg,var(--navy),#0e3a6b);border-radius:20px;padding:32px;color:#fff;position:relative;overflow:hidden;}
.about-panel::before{content:"";position:absolute;inset:0;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:36px 36px;}
.about-panel h3{position:relative;font-size:19px;margin-bottom:16px;color:var(--accent);}
.about-panel li{position:relative;list-style:none;padding:8px 0 8px 26px;font-size:14.5px;color:#d6e2f5;}
.about-panel li::before{content:"✓";position:absolute;left:0;color:var(--cyan);font-weight:700;}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.adv-card{background:var(--white);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border:1px solid #eef3f9;transition:.3s;}
.adv-card:hover{transform:translateY(-5px);}
.adv-num{font-size:32px;font-weight:800;background:linear-gradient(135deg,var(--blue),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1;}
.adv-card h4{margin:12px 0 8px;color:var(--navy);font-size:17px;}
.adv-card p{font-size:13.5px;color:var(--muted);}

/* ===== 发展历程 ===== */
.history{background:linear-gradient(160deg,var(--navy),var(--navy2));color:#fff;}
.history .sec-head h2{color:#fff;}
.history .sec-head p{color:#9db4d6;}
.timeline{position:relative;display:grid;grid-template-columns:repeat(5,1fr);gap:16px;}
.timeline::before{content:"";position:absolute;top:11px;left:2%;right:2%;height:2px;background:linear-gradient(90deg,var(--blue),var(--cyan));opacity:.6;}
.tl-item{position:relative;padding-top:34px;}
.tl-item::before{content:"";position:absolute;top:3px;left:50%;transform:translateX(-50%);width:16px;height:16px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 5px rgba(56,189,248,.2);}
.tl-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.13);border-radius:14px;padding:18px 16px;height:100%;transition:.3s;}
.tl-card:hover{background:rgba(56,189,248,.13);}
.tl-card b{display:block;color:var(--accent);font-size:15px;margin-bottom:8px;}
.tl-card p{font-size:13px;color:#b9cbeb;}

/* ===== 核心业务 ===== */
.svc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;}
.svc-grid.g3{grid-template-columns:repeat(3,1fr);}
.svc-card{background:var(--white);border-radius:var(--radius);padding:28px 24px;box-shadow:var(--shadow);transition:.3s;border:1px solid #eef3f9;position:relative;overflow:hidden;display:flex;flex-direction:column;}
.svc-card::after{content:"";position:absolute;left:0;top:0;height:4px;width:0;background:linear-gradient(90deg,var(--blue),var(--cyan));transition:.4s;}
.svc-card:hover{transform:translateY(-6px);}
.svc-card:hover::after{width:100%;}
.svc-icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(37,99,235,.12),rgba(6,182,212,.12));display:flex;align-items:center;justify-content:center;margin-bottom:18px;}
.svc-icon svg{width:26px;height:26px;stroke:var(--blue);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.svc-card h3{font-size:18px;color:var(--navy);margin-bottom:10px;}
.svc-card p{color:var(--muted);font-size:14px;flex:1;}
.svc-value{margin-top:14px;font-size:12.5px;color:#475569;background:rgba(37,99,235,.06);border-left:3px solid var(--cyan);padding:8px 10px;border-radius:0 8px 8px 0;}
.layers{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.layer-card{background:var(--white);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid #eef3f9;}
.layer-badge{display:inline-block;font-size:12px;font-weight:700;letter-spacing:2px;color:#fff;background:linear-gradient(135deg,var(--blue),var(--cyan));padding:5px 14px;border-radius:999px;margin-bottom:14px;}
.layer-card h3{font-size:19px;color:var(--navy);margin-bottom:12px;}
.layer-card ul{list-style:none;}
.layer-card li{font-size:13.5px;color:#475569;padding:6px 0 6px 18px;position:relative;}
.layer-card li::before{content:"▸";position:absolute;left:0;color:var(--cyan);}
.layer-card li b{color:var(--navy);}

/* ===== 解决方案 ===== */
.solutions{background:#eef4fa;}
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.sol-card{background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid #eef3f9;transition:.3s;}
.sol-card:hover{transform:translateY(-6px);}
.sol-cover{height:110px;position:relative;display:flex;align-items:flex-end;padding:16px 20px;}
.sol-cover h4{color:#fff;font-size:18px;position:relative;z-index:2;}
.s1{background:linear-gradient(135deg,#1d4ed8,#38bdf8);}
.s2{background:linear-gradient(135deg,#0e7490,#22d3ee);}
.s3{background:linear-gradient(135deg,#312e81,#6366f1);}
.sol-cover::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:26px 26px;}
.sol-body{padding:20px;}
.sol-body p{font-size:13.5px;color:var(--muted);}
.sol-tags{margin-top:12px;display:flex;gap:8px;flex-wrap:wrap;}
.sol-tags span{font-size:12px;color:var(--blue);background:rgba(37,99,235,.08);padding:4px 10px;border-radius:999px;}

/* ===== 产品 ===== */
.prod-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.prod-card{background:var(--white);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border:1px solid #eef3f9;transition:.3s;}
.prod-card:hover{transform:translateY(-5px);}
.prod-card .ic{font-size:28px;margin-bottom:12px;}
.prod-card h4{font-size:17px;color:var(--navy);margin-bottom:8px;}
.prod-card p{font-size:13.5px;color:var(--muted);}

/* ===== 合作伙伴 ===== */
.partners{background:linear-gradient(160deg,var(--navy),var(--navy2));color:#fff;}
.partners .sec-head h2{color:#fff;}
.partners .sec-head p{color:#9db4d6;}
.partner-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.partner-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:26px 24px;transition:.3s;}
.partner-card:hover{background:rgba(56,189,248,.13);transform:translateY(-4px);}
.partner-card h4{font-size:18px;margin-bottom:6px;}
.partner-card .role{font-size:12.5px;color:var(--accent);letter-spacing:1px;margin-bottom:10px;}
.partner-card p{font-size:13.5px;color:#b9cbeb;}

/* ===== 资质 ===== */
.cert-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin-bottom:36px;}
.cert-item{background:var(--white);border:1px solid #e3edf8;border-radius:14px;padding:20px 10px;text-align:center;box-shadow:var(--shadow);transition:.3s;}
.cert-item:hover{transform:translateY(-4px);border-color:var(--cyan);}
.cert-item b{display:block;font-size:14.5px;color:var(--navy);}
.cert-item span{font-size:11.5px;color:var(--muted);}
.cert-feats{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cert-feat{background:var(--white);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);border:1px solid #eef3f9;}
.cert-feat b{color:var(--navy);font-size:16px;display:block;margin-bottom:8px;}
.cert-feat p{font-size:13.5px;color:var(--muted);}

/* ===== 案例 ===== */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;}
.case-card{border-radius:var(--radius);overflow:hidden;background:var(--white);box-shadow:var(--shadow);transition:.3s;border:1px solid #eef3f9;display:flex;flex-direction:column;}
.case-card:hover{transform:translateY(-6px);}
.case-cover{min-height:92px;position:relative;display:flex;align-items:flex-end;padding:16px 20px;}
.case-cover h4{color:#fff;font-size:17px;position:relative;z-index:2;}
.c1{background:linear-gradient(135deg,#1d4ed8,#38bdf8);}
.c2{background:linear-gradient(135deg,#0e7490,#22d3ee);}
.c3{background:linear-gradient(135deg,#312e81,#6366f1);}
.c4{background:linear-gradient(135deg,#155e75,#2dd4bf);}
.case-cover::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.08) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.08) 1px,transparent 1px);background-size:26px 26px;}
.case-body{padding:20px;flex:1;}
.case-body p{font-size:13.5px;color:var(--muted);}
.case-tags{margin-top:12px;display:flex;gap:8px;flex-wrap:wrap;}
.case-tags span{font-size:12px;color:var(--blue);background:rgba(37,99,235,.08);padding:4px 10px;border-radius:999px;}

/* ===== 企业文化 ===== */
.culture{background:linear-gradient(160deg,var(--navy),var(--navy2));color:#fff;}
.culture .sec-head h2{color:#fff;}
.culture .sec-head p{color:#9db4d6;}
.cul-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.cul-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:28px 24px;transition:.3s;}
.cul-card:hover{background:rgba(56,189,248,.13);}
.cul-card h4{font-size:18px;color:var(--accent);margin-bottom:14px;}
.cul-card li{list-style:none;font-size:13.5px;color:#d6e2f5;padding:7px 0 7px 18px;position:relative;}
.cul-card li::before{content:"▸";position:absolute;left:0;color:var(--cyan);}
.cul-card li b{color:#fff;}
.cul-card p{font-size:13.5px;color:#b9cbeb;}

/* ===== 联系 ===== */
.contact{background:linear-gradient(160deg,#0e3a6b,var(--navy));color:#fff;}
.contact .sec-head h2{color:#fff;}
.contact .sec-head p{color:#9db4d6;}
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;}
.contact-card{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:30px 24px;text-align:center;transition:.3s;}
.contact-card:hover{background:rgba(56,189,248,.12);}
.contact-card .ic{width:52px;height:52px;margin:0 auto 16px;border-radius:14px;background:linear-gradient(135deg,var(--blue),var(--cyan));display:flex;align-items:center;justify-content:center;font-size:22px;}
.contact-card h4{font-size:16px;margin-bottom:8px;}
.contact-card p{font-size:14px;color:#b9cbeb;word-break:break-all;}
.contact-form{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:36px;max-width:760px;margin:40px auto 0;}
.contact-form h3{color:var(--accent);font-size:19px;margin-bottom:20px;text-align:center;}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.contact-form label{display:block;font-size:13px;color:#9db4d6;margin:14px 0 6px;}
.contact-form input,.contact-form textarea{width:100%;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:12px 14px;color:#fff;font-size:14px;font-family:inherit;}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--accent);}
.contact-form .btn{display:block;width:100%;text-align:center;border:none;cursor:pointer;margin-top:22px;}
.form-note{text-align:center;font-size:12px;color:#8fa9cf;margin-top:14px;}

/* ===== 页脚 ===== */
footer{background:#081627;color:#8fa9cf;padding:44px 0 28px;}
.foot{display:flex;justify-content:space-between;align-items:flex-start;gap:30px;flex-wrap:wrap;}
.foot-links{display:flex;gap:22px;flex-wrap:wrap;font-size:14px;}
.foot-links a:hover{color:#fff;}
.copyright{text-align:center;margin-top:30px;padding-top:22px;border-top:1px solid rgba(255,255,255,.08);font-size:12.5px;color:#5c7398;}

.reveal{opacity:0;transform:translateY(26px);transition:.7s ease;}
.reveal.show{opacity:1;transform:none;}

@media (max-width:960px){
  .about-top{grid-template-columns:1fr;}
  .svc-grid{grid-template-columns:repeat(2,1fr);}
  .svc-grid.g3{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr 1fr;}
  .timeline::before{display:none;}
  .layers{grid-template-columns:1fr;}
  .sol-grid{grid-template-columns:1fr;}
  .prod-grid{grid-template-columns:repeat(2,1fr);}
  .partner-grid{grid-template-columns:repeat(2,1fr);}
  .cert-grid{grid-template-columns:repeat(3,1fr);}
  .cert-feats{grid-template-columns:1fr;}
  .case-grid{grid-template-columns:1fr;}
  .cul-grid{grid-template-columns:1fr;}
  .contact-grid{grid-template-columns:1fr;}
  .adv-grid{grid-template-columns:repeat(2,1fr);}
  .form-row{grid-template-columns:1fr;}
}
@media (max-width:640px){
  nav ul{display:none;}
  .menu-btn{display:block;}
  nav.open ul{display:flex;flex-direction:column;position:absolute;top:72px;left:0;right:0;background:var(--navy);padding:16px 4%;}
  .svc-grid{grid-template-columns:1fr;}
  .prod-grid{grid-template-columns:1fr;}
  .partner-grid{grid-template-columns:1fr;}
  .timeline{grid-template-columns:1fr;}
  .cert-grid{grid-template-columns:repeat(2,1fr);}
  .hero-stats{grid-template-columns:repeat(2,1fr);}
  .adv-grid{grid-template-columns:1fr;}
}