:root{
  --blue-900:#0a2a43;
  --blue-800:#0f3d5c;
  --blue-700:#14507a;
  --blue-600:#1e6fa6;
  --blue-500:#2e9cca;
  --cyan:#36b7e0;
  --cyan-soft:#7fd8f0;
  --ink:#1f2d3a;
  --muted:#5d6b78;
  --line:#e4ebf1;
  --bg-alt:#f4f8fb;
  --white:#fff;
  --radius:14px;
  --shadow:0 10px 30px rgba(15,61,92,.10);
  --shadow-hover:0 16px 40px rgba(15,61,92,.18);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);line-height:1.7;background:var(--white);-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.icon-sprite{position:absolute;width:0;height:0;overflow:hidden}
.ico{display:block;width:100%;height:100%;stroke:currentColor;fill:none;stroke-width:1.75;stroke-linecap:round;stroke-linejoin:round}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- Header ---------- */
.site-header{
  position:fixed;top:0;left:0;right:0;z-index:50;
  background:rgba(255,255,255,.92);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);transition:.3s;
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{
  width:38px;height:38px;border-radius:10px;display:grid;place-items:center;
  background:linear-gradient(135deg,var(--blue-700),var(--cyan));color:#fff;font-weight:800;font-size:20px;
}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-text strong{font-size:17px;color:var(--blue-800)}
.brand-text em{font-style:normal;font-size:11px;color:var(--muted);letter-spacing:.5px}
.main-nav{display:flex;align-items:center;gap:22px}
.main-nav a{font-size:15px;color:var(--ink);position:relative;padding:6px 0;transition:.2s}
.main-nav a:hover{color:var(--blue-600)}
.main-nav a:not(.nav-cta)::after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--cyan);transition:.25s}
.main-nav a:not(.nav-cta):hover::after{width:100%}
.nav-cta{background:var(--blue-700);color:#fff!important;padding:8px 18px;border-radius:999px;font-size:14px}
.nav-cta:hover{background:var(--blue-600)}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:24px;height:2px;background:var(--blue-800);border-radius:2px;transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;padding:160px 0 110px;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(1200px 600px at 80% -10%,rgba(54,183,224,.45),transparent 60%),
  linear-gradient(135deg,var(--blue-900),var(--blue-700) 55%,var(--blue-600));
}
.hero-bg::after{content:"";position:absolute;inset:0;opacity:.12;
  background-image:linear-gradient(rgba(255,255,255,.5) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.5) 1px,transparent 1px);
  background-size:46px 46px;mask-image:radial-gradient(circle at 70% 30%,#000,transparent 75%)}
.hero-inner{position:relative;max-width:760px}
.hero-eyebrow{font-size:13px;letter-spacing:2px;color:var(--cyan-soft);margin-bottom:14px}
.hero h1{font-size:46px;line-height:1.2;font-weight:800;letter-spacing:1px}
.hero-sub{font-size:20px;margin-top:18px;color:#eaf6ff}
.hero-desc{font-size:15px;margin-top:14px;color:#cfe6f4;max-width:640px}
.hero-actions{margin-top:32px;display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 30px;border-radius:999px;font-size:15px;font-weight:600;cursor:pointer;transition:.25s;border:0}
.btn-primary{background:var(--cyan);color:#063047;box-shadow:0 8px 22px rgba(54,183,224,.45)}
.btn-primary:hover{transform:translateY(-2px);background:#4fc6ec}
.btn-ghost{border:1.5px solid rgba(255,255,255,.6);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}

/* ---------- Section ---------- */
.section{padding:88px 0}
.section-alt{background:var(--bg-alt)}
.section-head{max-width:760px;margin:0 auto 50px;text-align:center}
.section-tag{display:inline-block;font-size:12px;letter-spacing:2px;color:var(--blue-500);font-weight:700;margin-bottom:10px}
.section-head h2{font-size:32px;color:var(--blue-800);font-weight:800}
.section-lead{margin-top:14px;color:var(--muted);font-size:15.5px}
.section-head.light h2,.section-head.light .section-lead{color:#fff}
.section-head.light .section-lead{color:#d6ecf7}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1.4fr 1fr;gap:46px;align-items:center}
.about-text p{margin-bottom:14px;color:#3c4a57}
.about-stats{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow)}
.stat-num{display:block;font-size:34px;font-weight:800;color:var(--blue-700);line-height:1}
.stat-num small{font-size:16px;margin-left:2px}
.stat-label{display:block;margin-top:8px;font-size:13px;color:var(--muted)}
.feature-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:54px}
.feature{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 22px;transition:.25s}
.feature:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--cyan-soft)}
.feature-ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#eaf6fd,#d6ecf7);color:var(--blue-700);margin-bottom:8px}
.feature-ico .ico{width:27px;height:27px}
.feature h4{margin:12px 0 8px;color:var(--blue-800);font-size:17px}
.feature p{font-size:14px;color:var(--muted)}

/* ---------- Cards (Products) ---------- */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 26px;transition:.25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover);border-color:var(--cyan)}
.card-ico{width:54px;height:54px;border-radius:14px;display:grid;place-items:center;background:linear-gradient(135deg,#eaf6fd,#d6ecf7);color:var(--blue-700);margin-bottom:16px}
.card-ico .ico{width:28px;height:28px}
.card h3{color:var(--blue-800);font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}

/* ---------- Solutions ---------- */
.sol-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sol{display:block;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;position:relative;overflow:hidden;transition:.25s}
.sol::before{content:"";position:absolute;left:0;top:0;height:4px;width:0;background:linear-gradient(90deg,var(--blue-600),var(--cyan));transition:.3s}
.sol:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.sol:hover::before{width:100%}
.sol h3{color:var(--blue-800);font-size:18px;margin-bottom:8px}
.sol p{color:var(--muted);font-size:14px}

/* ---------- Cases ---------- */
.case-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.case{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;transition:.25s}
.case:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--cyan)}
.case-city{display:inline-block;font-size:12px;color:#fff;background:var(--blue-600);padding:3px 12px;border-radius:999px;margin-bottom:14px}
.case h3{color:var(--blue-800);font-size:19px;margin-bottom:10px}
.case p{color:var(--muted);font-size:14.5px}

/* ---------- Team ---------- */
.team-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.member{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;text-align:center;transition:.25s}
.member:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.avatar{width:72px;height:72px;border-radius:50%;margin:0 auto 16px;display:grid;place-items:center;font-size:28px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--blue-700),var(--cyan))}
.member h3{color:var(--blue-800);font-size:18px}
.member-role{color:var(--cyan);font-size:13px;margin:4px 0 10px}
.member p{color:var(--muted);font-size:14px}

/* ---------- News ---------- */
.news-list{display:grid;gap:16px;max-width:860px;margin:0 auto}
.news-item{display:flex;gap:22px;align-items:center;background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;transition:.25s}
.news-item:hover{transform:translateX(4px);box-shadow:var(--shadow);border-color:var(--cyan)}
.news-date{flex:0 0 70px;font-weight:800;color:var(--blue-600);font-size:18px}
.news-body h3{color:var(--blue-800);font-size:17px;margin-bottom:4px}
.news-body p{color:var(--muted);font-size:14px}

/* ---------- Partners ---------- */
.partner-grid{display:flex;flex-wrap:wrap;gap:16px;justify-content:center}
.partner{display:inline-flex;align-items:center;justify-content:center;min-width:160px;padding:20px 26px;border:1px solid var(--line);border-radius:var(--radius);background:var(--white);color:var(--blue-800);font-weight:700;font-size:16px;transition:.25s}
.partner:hover{border-color:var(--cyan);box-shadow:var(--shadow);transform:translateY(-3px)}
.partner-more{color:var(--muted);font-weight:500;border-style:dashed;background:transparent}
.cred-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:34px}
.cred{font-size:13px;color:var(--muted);border:1px dashed var(--cyan-soft);border-radius:999px;padding:8px 16px;background:#fff}

/* ---------- Jobs ---------- */
.job-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.job{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.job:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover);border-color:var(--cyan)}
.job h3{color:var(--blue-800);font-size:18px;margin-bottom:8px}
.job p{color:var(--muted);font-size:14px}
.job-meta{display:inline-block;margin-top:12px;font-size:12.5px;color:var(--blue-600);background:#eaf6fd;padding:4px 12px;border-radius:999px}
.join-tip{text-align:center;margin-top:30px;color:var(--muted);font-size:14px}
.join-tip a{color:var(--blue-600);text-decoration:underline}

/* ---------- Contact ---------- */
.contact{background:linear-gradient(135deg,var(--blue-900),var(--blue-700));color:#fff}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:start}
.contact-info .ci{display:flex;gap:14px;margin-bottom:22px}
.ci-ico{width:44px;height:44px;flex:0 0 44px;border-radius:12px;display:grid;place-items:center;background:rgba(255,255,255,.12);color:var(--cyan-soft);margin-top:2px}
.ci-ico .ico{width:21px;height:21px}
.sol-ico{width:46px;height:46px;border-radius:12px;display:grid;place-items:center;background:linear-gradient(135deg,#eaf6fd,#d6ecf7);color:var(--blue-700);margin-bottom:14px}
.sol-ico .ico{width:24px;height:24px}
.form-ok{color:#9ff0c0;font-size:13px;margin-top:10px;font-weight:600}
.ci h4{font-size:15px;color:var(--cyan-soft);margin-bottom:3px}
.ci p{font-size:15px}
.placeholder{color:#ffd9a8!important;font-style:italic}
.contact-form{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:var(--radius);padding:26px;backdrop-filter:blur(4px)}
.contact-form input,.contact-form textarea{width:100%;padding:12px 14px;margin-bottom:14px;border:1px solid rgba(255,255,255,.25);border-radius:10px;background:rgba(255,255,255,.1);color:#fff;font-size:14px;font-family:inherit}
.contact-form input::placeholder,.contact-form textarea::placeholder{color:rgba(255,255,255,.6)}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--cyan)}
.form-note{font-size:12px;color:rgba(255,255,255,.65);margin-top:10px}

/* ---------- Footer ---------- */
.site-footer{background:var(--blue-900);color:#cfe0ec;padding:54px 0 0}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr;gap:40px;padding-bottom:40px}
.footer-desc{margin-top:14px;font-size:14px;color:#9fb6c6}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-col a{display:block;font-size:14px;color:#9fb6c6;margin-bottom:9px;transition:.2s}
.footer-col a:hover{color:var(--cyan)}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:18px 0;font-size:13px;color:#8aa1b2}
.footer-bottom .container{display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
.footer-bottom a{color:#8aa1b2}
.footer-bottom a:hover{color:var(--cyan)}

/* ---------- To top ---------- */
.to-top{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;border:0;background:var(--blue-700);color:#fff;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transition:.3s;box-shadow:var(--shadow);z-index:40}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{background:var(--blue-600)}

/* ---------- 子页横幅 ---------- */
.subhero{position:relative;padding:118px 0 64px;color:#fff;overflow:hidden;background:
  radial-gradient(900px 460px at 85% -20%,rgba(54,183,224,.45),transparent 60%),
  linear-gradient(135deg,var(--blue-900),var(--blue-700) 55%,var(--blue-600));}
.subhero .crumb{font-size:13px;color:var(--cyan-soft);margin-bottom:12px;letter-spacing:1px}
.subhero .crumb a:hover{color:#fff}
.subhero h1{font-size:38px;font-weight:800;letter-spacing:1px}
.subhero p{margin-top:14px;color:#d6ecf7;max-width:700px;font-size:16px}

/* ---------- 当前页导航高亮 ---------- */
.main-nav a.active{color:var(--blue-600);font-weight:700}
.main-nav a.active::after{width:100%}

/* ---------- 概览页 "了解更多" ---------- */
.more-link{display:inline-block;margin-top:30px;color:var(--blue-600);font-weight:700;font-size:15px}
.more-link:hover{color:var(--cyan)}

/* ---------- 首页 CTA 引导条 ---------- */
.cta-band{background:linear-gradient(135deg,var(--blue-800),var(--cyan));color:#fff;text-align:center;padding:66px 0}
.cta-band h2{font-size:28px;margin-bottom:12px}
.cta-band p{color:#eaf6ff;margin-bottom:26px;font-size:16px}

/* ---------- Responsive ---------- */
@media(max-width:980px){
  .about-grid{grid-template-columns:1fr;gap:30px}
  .feature-row{grid-template-columns:repeat(2,1fr)}
  .card-grid,.sol-grid,.team-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid,.job-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:680px){
  .nav-toggle{display:flex}
  .main-nav{position:absolute;top:68px;left:0;right:0;background:#fff;flex-direction:column;gap:0;padding:10px 24px 20px;max-height:0;overflow:hidden;transition:.3s;box-shadow:var(--shadow)}
  .main-nav.open{max-height:520px}
  .main-nav a{padding:12px 0;border-bottom:1px solid var(--line);width:100%}
  .nav-cta{display:inline-block;margin-top:10px;text-align:center}
  .hero{padding:130px 0 80px}
  .hero h1{font-size:32px}
  .hero-sub{font-size:17px}
  .section{padding:60px 0}
  .section-head h2{font-size:26px}
  .feature-row,.card-grid,.sol-grid,.team-grid{grid-template-columns:1fr}
  .about-stats{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr}
  .news-item{flex-direction:column;align-items:flex-start;gap:8px}
}