/* ===== 基础变量 ===== */
:root{
  --navy:#0a2540;
  --navy-2:#0e2f54;
  --blue:#1e6fff;
  --blue-2:#3b8bff;
  --cyan:#19c3d6;
  --ink:#1c2433;
  --muted:#5b6b82;
  --line:#e6ecf3;
  --bg:#ffffff;
  --bg-alt:#f4f7fb;
  --radius:16px;
  --shadow:0 10px 30px rgba(14,47,84,.08);
  --maxw:1180px;
}
*{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);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(10,37,64,.92);backdrop-filter:blur(10px);transition:.3s}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:14px 22px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:10px;color:#fff}
.brand-logo{width:38px;height:38px;object-fit:contain;border-radius:10px;background:#fff;padding:3px}
.brand-text{font-weight:700;font-size:17px;line-height:1.1;display:flex;flex-direction:column}
.brand-text small{font-size:10px;letter-spacing:2px;color:#9fc0e8;font-weight:500}
.nav-links{display:flex;gap:26px}
.nav-links a{color:#dce8f6;font-size:15px;font-weight:500;position:relative;padding:4px 0;transition:.2s}
.nav-links a:hover{color:#fff}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--cyan);transition:.25s}
.nav-links a:hover::after{width:100%}
.nav-oa{color:#fff!important;background:var(--blue);padding:6px 14px!important;border-radius:999px;font-weight:600}
.nav-oa:hover{background:var(--blue-2)}
.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:#fff;border-radius:2px;transition:.3s}

/* ===== Hero ===== */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff;overflow:hidden}
.hero-bg{position:absolute;inset:0;background:
  radial-gradient(1200px 600px at 70% -10%,rgba(30,111,255,.45),transparent 60%),
  radial-gradient(900px 500px at 10% 110%,rgba(25,195,214,.35),transparent 55%),
  linear-gradient(160deg,var(--navy),var(--navy-2));z-index:0}
.hero-bg::before{content:"";position:absolute;inset:0;background:
  radial-gradient(800px 400px at 50% 30%,rgba(57,139,255,.25),transparent 70%),
  radial-gradient(600px 300px at 80% 80%,rgba(25,195,214,.18),transparent 70%);opacity:.9;pointer-events:none}
.hero-bg::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:60px 60px;opacity:.4;pointer-events:none}
.hero-inner{position:relative;z-index:1;max-width:880px;padding:120px 22px 60px}
.hero-tag{letter-spacing:4px;font-size:13px;color:#9fc0e8;margin-bottom:18px}
.hero-title{font-size:clamp(30px,5vw,54px);font-weight:800;letter-spacing:1px;line-height:1.2}
.hero-sub{margin:18px auto 30px;font-size:clamp(15px,2vw,19px);color:#cfe0f4;max-width:680px}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:13px 28px;border-radius:999px;font-weight:600;font-size:15px;transition:.25s;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;box-shadow:0 8px 22px rgba(30,111,255,.4)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(30,111,255,.5)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.5);color:#fff}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
.btn-lg{padding:15px 34px;font-size:16px}
.hero-scroll{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);font-size:30px;color:#fff;opacity:.7;z-index:1;animation:bob 1.8s infinite}
@keyframes bob{0%,100%{transform:translate(-50%,0)}50%{transform:translate(-50%,8px)}}

/* ===== 通用 section ===== */
.section{max-width:var(--maxw);margin:0 auto;padding:90px 22px}
.section-alt{background:var(--bg-alt);max-width:none}
.section-alt>*{max-width:var(--maxw);margin-left:auto;margin-right:auto}
.section-head{text-align:center;margin-bottom:48px}
.kicker{display:inline-block;font-size:13px;letter-spacing:3px;color:var(--blue);font-weight:700;margin-bottom:10px}
.kicker.light{color:var(--cyan)}
.section-head h2{font-size:clamp(26px,4vw,40px);font-weight:800;color:var(--navy)}
.lead{margin-top:12px;color:var(--muted);font-size:17px}
.sub-title{font-size:24px;font-weight:800;color:var(--navy);margin:48px 0 22px;position:relative;padding-left:14px}
.sub-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:5px;border-radius:3px;background:linear-gradient(var(--blue),var(--cyan))}
.sub-title.center{text-align:center;padding-left:0}
.sub-title.center::before{display:none}
.mini-title{font-size:18px;font-weight:700;color:var(--navy);margin:26px 0 12px}
.indent{color:#33425a;margin-bottom:8px}
.indent b{color:var(--navy)}

/* 关于卡片 */
.about-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;margin-bottom:26px;box-shadow:var(--shadow)}
.timeline{list-style:none;display:grid;gap:0;margin-top:8px}
.timeline li{display:grid;grid-template-columns:88px 1fr;gap:18px;padding:14px 0;border-bottom:1px dashed var(--line);align-items:center}
.timeline li:last-child{border-bottom:0}
.timeline .yr{font-weight:800;color:var(--blue);font-size:18px}
.tag-list{list-style:none;display:flex;flex-wrap:wrap;gap:12px;margin-top:6px}
.tag-list li{background:var(--bg-alt);border:1px solid var(--line);border-radius:999px;padding:8px 16px;font-size:14px;color:#33425a}
.culture-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.culture-card{background:var(--bg-alt);border-radius:14px;padding:24px;border:1px solid var(--line)}
.culture-card p{color:#33425a;font-size:15px}
.culture-label{display:inline-block;font-size:13px;color:var(--blue);font-weight:700;letter-spacing:1px;margin-bottom:10px}
.culture-card.accent{background:var(--bg-alt);border:1px solid var(--line);color:inherit}
.culture-card.accent .culture-label{color:var(--blue)}
.culture-card.accent p{color:#33425a}
.contact-card{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;border:0;border-radius:var(--radius);padding:34px;max-width:var(--maxw);margin:0 auto;box-shadow:var(--shadow)}
.contact-card .sub-title{color:#fff}
.contact-card .sub-title::before{background:var(--cyan)}
.contact-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.contact-item .c-label{font-size:13px;color:var(--cyan);letter-spacing:1px;font-weight:700}
.contact-item p{font-size:17px;color:#fff;margin-top:6px}
.contact-item a{color:#fff;text-decoration:underline}
#contact .section-head h2{color:var(--navy)}

/* 产品 */
.prod-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:22px}
.prod-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:.25s;position:relative;overflow:hidden}
.prod-card:hover{transform:translateY(-4px);box-shadow:0 16px 40px rgba(14,47,84,.14)}
.prod-badge{position:absolute;top:18px;right:18px;background:linear-gradient(135deg,var(--blue),var(--cyan));color:#fff;font-size:12px;font-weight:700;padding:5px 12px;border-radius:999px}
.prod-card h3{font-size:21px;color:var(--navy);margin-bottom:10px}
.prod-desc{color:var(--muted);font-size:15px;margin-bottom:14px}
.prod-spec{list-style:none;display:grid;gap:8px}
.prod-spec li{padding-left:20px;position:relative;color:#33425a;font-size:14px}
.prod-spec li::before{content:"▸";position:absolute;left:0;color:var(--blue)}
.track-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.track{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;text-align:center;box-shadow:var(--shadow)}
.track b{display:block;color:var(--navy);font-size:17px;margin-bottom:6px}
.track span{font-size:13px;color:var(--muted)}
.ship-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.ship{background:linear-gradient(135deg,var(--navy),var(--navy-2));color:#fff;border-radius:14px;padding:22px;text-align:center}
.ship strong{display:block;font-size:30px;font-weight:800;color:#fff}
.ship span{font-size:13px;color:#bcd3ec}
.partner{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;display:grid;gap:8px;box-shadow:var(--shadow)}
.partner p{color:#33425a;font-size:15px}
.partner b{color:var(--navy)}

/* 招聘 */
.why-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px;margin-bottom:20px}
.why{background:var(--bg-alt);border:1px solid var(--line);border-radius:14px;padding:22px}
.why b{display:block;color:var(--navy);font-size:17px;margin-bottom:6px}
.why span{font-size:14px;color:var(--muted)}
.job-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.job{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;box-shadow:var(--shadow);transition:.25s}
.job:hover{transform:translateY(-4px);box-shadow:0 14px 34px rgba(14,47,84,.12)}
.job h4{font-size:18px;color:var(--navy);margin-bottom:10px}
.job p{font-size:14px;color:var(--muted);margin-bottom:12px}
.job-meta{font-size:13px;color:var(--blue);font-weight:600}
.job-note{text-align:center;color:var(--muted);font-size:14px;margin-top:24px}
.job-note a{color:var(--blue);font-weight:600}

/* 页脚 */
.footer{background:#06182b;color:#bcd3ec;padding:50px 22px 24px}
.footer-inner{max-width:var(--maxw);margin:0 auto;display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.footer-brand{display:flex;gap:12px;align-items:flex-start}
.footer-brand .brand-logo{width:34px;height:34px;background:#fff;padding:3px;border-radius:8px}
.footer-brand p{font-size:15px;color:#fff}
.footer-brand small{color:#7fa6cf}
.footer-nav{display:flex;flex-direction:column;gap:10px}
.footer-nav a{color:#bcd3ec;font-size:14px;transition:.2s}
.footer-nav a:hover{color:#fff}
.footer-contact p{font-size:14px;line-height:1.9}
.footer-contact a{color:var(--cyan)}
.footer-bottom{text-align:center;font-size:13px;color:#5d7a9c;border-top:1px solid rgba(255,255,255,.08);margin-top:30px;padding-top:18px}

/* 滚动揭示动画 */
.reveal{opacity:0;transform:translateY(28px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:860px){
  .nav-links{position:fixed;top:64px;right:0;left:0;flex-direction:column;gap:0;background:var(--navy);padding:10px 0;max-height:0;overflow:hidden;transition:.3s}
  .nav-links.open{max-height:340px}
  .nav-links a{padding:14px 24px;width:100%}
  .nav-links a::after{display:none}
  .nav-toggle{display:flex}
  .footer-inner{grid-template-columns:1fr;gap:24px}
  .section{padding:64px 18px}
  .about-block{padding:24px}
  .footer-bottom{font-size:12px}
}
@media(max-width:480px){
  .prod-grid,.job-grid{grid-template-columns:1fr}
}