:root{
  --brand:#0b66ff;
  --brand-deep:#0b3f9f;
  --brand-ink:#0d2a62;
  --ink:#14233c;
  --muted:#4d6285;
  --line:#cfdbef;
  --panel:#ffffff;
  --bg-1:#eef3fb;
  --bg-2:#e8eff9;
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:
    radial-gradient(1200px 600px at 85% -5%, rgba(126,173,255,.14), transparent 60%),
    radial-gradient(900px 500px at -5% 25%, rgba(126,173,255,.10), transparent 60%),
    linear-gradient(180deg,#f4f8ff 0%,#ecf2fb 50%,#e9f0fa 100%);
  font-size:18px;
  line-height:1.75;
}

a{text-decoration:none;color:inherit}

.container{max-width:1120px;margin:0 auto;padding:0 28px}

.header{
  color:#fff;
  background:
    radial-gradient(900px 320px at 20% -8%, rgba(255,255,255,.24), transparent 65%),
    radial-gradient(900px 320px at 85% 10%, rgba(255,255,255,.14), transparent 60%),
    linear-gradient(125deg,var(--brand-deep),var(--brand));
  box-shadow:0 14px 40px rgba(11,72,180,.22);
  padding-bottom:40px;
}

.nav{
  min-height:82px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}
.logo{font-size:31px;font-weight:800;letter-spacing:.6px}
.nav-links{display:flex;flex-wrap:wrap;gap:8px}
.nav-links a{
  font-size:17px;
  color:#e8f2ff;
  padding:8px 12px;
  border-radius:10px;
  transition:.18s ease;
}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.18);color:#fff}

.hero{padding:88px 0 120px;position:relative}
.hero::after{
  content:"";
  position:absolute;
  right:6%;
  bottom:22px;
  width:380px;
  height:380px;
  border-radius:50%;
  background:radial-gradient(circle,rgba(255,255,255,.24),transparent 70%);
  pointer-events:none;
}
.hero h1{
  margin:0 0 16px;
  font-size:48px;
  line-height:1.2;
  letter-spacing:.2px;
  font-weight:800;
}
.hero p{
  margin:0;
  font-size:20px;
  line-height:1.75;
  color:#ecf5ff;
  max-width:860px;
}
.btn{
  display:inline-block;
  margin-top:30px;
  background:#fff;
  color:var(--brand-deep);
  padding:14px 26px;
  border-radius:13px;
  font-size:20px;
  font-weight:700;
  box-shadow:0 12px 28px rgba(8,30,80,.24);
}

.section{
  padding:92px 0;
  position:relative;
  border-top:1px solid rgba(164,183,213,.14);
}
.header + .section{padding-top:120px}
.section:nth-of-type(odd),
.section:nth-of-type(even),
.section.gray{
  background:transparent;
}

.section h2{
  margin:0 0 24px;
  font-size:38px;
  line-height:1.3;
  color:#0f2448;
  letter-spacing:.2px;
}
.lead{
  margin:0 0 20px;
  font-size:19px;
  line-height:1.8;
  color:var(--muted);
}

.cards{display:grid;gap:34px}
.cards.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.cards.three{grid-template-columns:repeat(2,minmax(0,1fr))}
.cards.four{grid-template-columns:repeat(2,minmax(0,1fr))}

.card{
  background:linear-gradient(180deg,#fff 0%,#f7fbff 100%);
  border:1px solid var(--line);
  border-radius:18px;
  padding:34px;
  min-height:220px;
  box-shadow:0 10px 24px rgba(12,71,173,.08);
}
.card h3{
  margin:0 0 12px;
  font-size:25px;
  line-height:1.35;
  color:var(--brand-ink);
}
.card p{
  margin:0;
  font-size:18px;
  line-height:1.75;
  color:var(--muted);
}

.list{margin:0;padding-left:28px}
.list li{margin:10px 0;font-size:20px;line-height:1.72;color:var(--muted)}

.news-list{display:grid;gap:24px}
.news-item{
  background:linear-gradient(180deg,#fff,#f6faff);
  border:1px solid #c8d8ef;
  border-radius:20px;
  padding:28px;
  box-shadow:0 12px 30px rgba(10,76,200,.08);
}
.news-item .tag{
  display:inline-block;
  padding:6px 12px;
  border-radius:999px;
  background:#e9f1ff;
  color:#2455b8;
  font-size:15px;
  font-weight:700;
  margin-bottom:12px;
}
.news-item h1{font-size:46px;line-height:1.2;margin:0 0 12px;color:#10213f}
.news-item h3{font-size:32px;line-height:1.28;margin:0 0 12px;color:#10213f}
.news-item p{font-size:20px;color:var(--muted);margin:0 0 10px;line-height:1.74}
.news-meta{font-size:17px;color:#647896}
.news-thumb{width:100%;max-height:420px;object-fit:cover;border-radius:16px;margin-bottom:14px}
.news-nav{display:flex;justify-content:space-between;gap:12px;margin-top:22px}
.news-nav a{display:inline-block;padding:11px 16px;background:#eef4ff;border:1px solid #cfe0ff;border-radius:11px;color:#1b4cb3;font-weight:700}

.map-box{
  height:340px;
  border-radius:16px;
  border:1px dashed #9fb7de;
  background:linear-gradient(45deg,#e4eefb,#dbe8f9);
  display:flex;
  align-items:center;
  justify-content:center;
  color:#48638f;
  font-size:20px;
}

.contact-right{display:flex;flex-direction:column;gap:20px}
.wechat-box h3{margin:0 0 8px}
.wechat-box p{margin:0 0 12px}
.wechat-qr{
  width:220px;
  height:220px;
  object-fit:cover;
  border-radius:14px;
  border:1px solid #c7d8f1;
  box-shadow:0 8px 20px rgba(12,71,173,.10);
  display:none;
}
.qr-placeholder{
  width:220px;
  height:220px;
  border-radius:14px;
  border:1px dashed #9fb7de;
  color:#48638f;
  font-size:18px;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:12px;
  text-align:center;
  background:linear-gradient(45deg,#eaf2ff,#dfeafb);
}

.footer{
  background:linear-gradient(180deg,#132a56,#0e1d3c);
  color:#e2e9f7;
  padding-top:44px;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.17);
  padding:18px 0 24px;
  color:#c8d3ea;
  font-size:17px;
}

/* 超大屏更饱满 */
@media(min-width:1900px){
  .container{max-width:1820px;padding:0 56px}
  .hero h1{font-size:74px}
  .hero p{font-size:28px}
}

@media(min-width:1700px){
  .container{max-width:1480px;padding:0 42px}
  .cards.three{grid-template-columns:repeat(3,minmax(0,1fr))}
}

@media(max-width:1600px){
  .container{max-width:1220px;padding:0 28px}
}

@media(max-width:1280px){
  .container{max-width:1080px;padding:0 22px}
  .hero{padding:82px 0 90px}
  .hero h1{font-size:50px}
  .hero p{font-size:21px}
  .section{padding:96px 0}
  .section h2{font-size:40px}
  .cards.two,.cards.three,.cards.four{grid-template-columns:1fr}
}

@media(max-width:900px){
  body{font-size:16px;line-height:1.65}
  .container{padding:0 16px}
  .nav{min-height:auto;padding:14px 0;display:block}
  .logo{font-size:24px}
  .nav-links{margin-top:10px;gap:6px}
  .nav-links a{font-size:14px;padding:6px 8px}
  .hero{padding:48px 0 58px;text-align:center}
  .hero h1{font-size:32px}
  .hero p{font-size:16px;max-width:100%;margin:0 auto}
  .section{padding:54px 0}
  .section h2{font-size:28px}
  .lead{font-size:16px}
  .card{padding:18px}
  .card h3{font-size:21px}
  .card p{font-size:16px}
  .list li{font-size:16px}
  .news-item h1{font-size:30px}
  .news-item h3{font-size:24px}
  .news-item p{font-size:16px}
  .cards.two,.cards.three,.cards.four{grid-template-columns:1fr}
  .wechat-qr,.qr-placeholder{width:180px;height:180px}
}