:root{
  --bg:#f6f8fc;
  --card:#ffffff;
  --text:#162033;
  --muted:#667085;
  --line:#e6eaf2;
  --blue:#2481cc;
  --blue2:#0f69b4;
  --dark:#0d1b2a;
  --gold:#d8b45f;
  --shadow:0 18px 50px rgba(16,32,64,.10);
  --radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Arial,sans-serif;
  color:var(--text);
  background:
    radial-gradient(circle at 15% 0%, rgba(36,129,204,.12), transparent 34%),
    radial-gradient(circle at 88% 12%, rgba(216,180,95,.14), transparent 30%),
    var(--bg);
  line-height:1.75;
}
a{color:inherit;text-decoration:none}
.container{width:min(1120px,92vw);margin:0 auto}
.nav{
  position:sticky;top:0;z-index:20;
  backdrop-filter:blur(16px);
  background:rgba(246,248,252,.78);
  border-bottom:1px solid rgba(230,234,242,.9);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 0;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;letter-spacing:.02em}
.logo{
  width:38px;height:38px;border-radius:12px;
  background:linear-gradient(135deg,var(--blue),#58b4ff);
  display:grid;place-items:center;color:#fff;font-weight:900;
  box-shadow:0 10px 26px rgba(36,129,204,.25);
}
.nav-links{display:flex;gap:16px;align-items:center;font-size:14px;color:var(--muted)}
.nav-links a:hover{color:var(--blue)}
.hero{
  padding:72px 0 44px;
}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:34px;align-items:center}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 12px;border:1px solid var(--line);border-radius:999px;
  background:rgba(255,255,255,.74);color:var(--blue);font-weight:700;font-size:13px;
}
h1{font-size:clamp(34px,5vw,58px);line-height:1.12;margin:18px 0 18px;letter-spacing:-.04em}
.lead{font-size:18px;color:#475467;max-width:760px;margin:0 0 26px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  min-height:46px;padding:12px 18px;border-radius:14px;
  font-weight:800;border:1px solid transparent;transition:.2s ease;
}
.btn-primary{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;box-shadow:0 14px 28px rgba(36,129,204,.22)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 18px 36px rgba(36,129,204,.28)}
.btn-secondary{background:#fff;border-color:var(--line);color:var(--dark)}
.btn-secondary:hover{border-color:rgba(36,129,204,.35);transform:translateY(-2px)}
.visual-card{
  background:linear-gradient(145deg,#0e2036,#122a46 55%,#0b1728);
  border:1px solid rgba(255,255,255,.12);
  border-radius:32px;
  padding:26px;
  color:#fff;
  box-shadow:var(--shadow);
  min-height:360px;
  position:relative;
  overflow:hidden;
}
.visual-card:before{
  content:"";position:absolute;inset:-80px -80px auto auto;
  width:230px;height:230px;border-radius:50%;
  background:radial-gradient(circle,rgba(36,129,204,.65),transparent 66%);
}
.visual-card:after{
  content:"";position:absolute;left:-70px;bottom:-90px;
  width:250px;height:250px;border-radius:50%;
  background:radial-gradient(circle,rgba(216,180,95,.42),transparent 64%);
}
.visual-content{position:relative;z-index:1}
.stat-row{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:26px}
.stat{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.12);border-radius:18px;padding:14px}
.stat strong{display:block;font-size:22px}
.stat span{font-size:12px;color:rgba(255,255,255,.72)}
.section{padding:34px 0}
.section-title{font-size:30px;line-height:1.2;margin:0 0 10px;letter-spacing:-.02em}
.section-desc{color:var(--muted);margin:0 0 22px;max-width:780px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{
  background:rgba(255,255,255,.86);
  border:1px solid var(--line);
  border-radius:var(--radius);
  padding:22px;
  box-shadow:0 10px 30px rgba(16,32,64,.06);
}
.card:hover{transform:translateY(-3px);transition:.2s ease;box-shadow:var(--shadow)}
.card h3{margin:0 0 8px;font-size:20px}
.card p{margin:0 0 16px;color:var(--muted)}
.card .more{font-weight:800;color:var(--blue)}
.article{
  display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:26px;align-items:start;
}
.content{
  background:#fff;border:1px solid var(--line);border-radius:26px;padding:30px;box-shadow:0 10px 30px rgba(16,32,64,.05)
}
.content h2{font-size:26px;margin:28px 0 10px;letter-spacing:-.02em}
.content h2:first-child{margin-top:0}
.content h3{font-size:20px;margin:22px 0 8px}
.content p,.content li{color:#475467}
.content ul{padding-left:20px}
.toc{
  position:sticky;top:78px;background:#fff;border:1px solid var(--line);
  border-radius:22px;padding:18px;box-shadow:0 10px 30px rgba(16,32,64,.05)
}
.toc strong{display:block;margin-bottom:10px}
.toc a{display:block;color:var(--muted);padding:7px 0;font-size:14px}
.toc a:hover{color:var(--blue)}
.notice{
  border:1px solid rgba(36,129,204,.18);
  background:rgba(36,129,204,.06);
  border-radius:20px;padding:18px;margin:22px 0;
}
.cta{
  background:linear-gradient(135deg,#0d1b2a,#14365a);
  color:#fff;border-radius:28px;padding:30px;margin:28px 0;position:relative;overflow:hidden
}
.cta:after{content:"";position:absolute;right:-70px;top:-80px;width:220px;height:220px;border-radius:50%;background:radial-gradient(circle,rgba(36,129,204,.55),transparent 65%)}
.cta>*{position:relative;z-index:1}
.cta p{color:rgba(255,255,255,.76)}
.related{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:14px}
.related a{background:#fff;border:1px solid var(--line);border-radius:16px;padding:14px;color:var(--text);font-weight:700}
.footer{padding:36px 0;color:var(--muted);font-size:14px;border-top:1px solid var(--line);margin-top:40px}
.footer-inner{display:flex;justify-content:space-between;gap:18px;flex-wrap:wrap}
.kv{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin:20px 0}
.kv div{background:#f8fafc;border:1px solid var(--line);border-radius:16px;padding:14px}
.kv b{display:block;color:var(--text)}
@media (max-width:880px){
  .hero{padding:42px 0 28px}
  .hero-grid,.article{grid-template-columns:1fr}
  .grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .visual-card{min-height:300px}
  .stat-row{grid-template-columns:1fr}
  .toc{position:relative;top:auto}
  .content{padding:22px;border-radius:22px}
  .related{grid-template-columns:1fr}
  .kv{grid-template-columns:1fr}
}




/* 内页顶部导航 logo 图片修复：只限制导航栏小图标，不影响页面正文 */
.nav .brand .logo{
  width:38px !important;
  height:38px !important;
  min-width:38px !important;
  flex:0 0 38px !important;
  border-radius:12px !important;
  background:#ffffff !important;
  overflow:hidden !important;
  padding:5px !important;
  border:1px solid rgba(36,129,204,.18) !important;
  box-shadow:0 10px 26px rgba(36,129,204,.16) !important;
  display:grid !important;
  place-items:center !important;
}

.nav .brand .logo img{
  width:100% !important;
  height:100% !important;
  max-width:28px !important;
  max-height:28px !important;
  display:block !important;
  object-fit:contain !important;
  border-radius:7px !important;
}

.nav .brand{
  overflow:hidden;
}

@media (max-width:880px){
  .nav .brand .logo{
    width:36px !important;
    height:36px !important;
    min-width:36px !important;
    flex-basis:36px !important;
    padding:5px !important;
  }

  .nav .brand .logo img{
    max-width:26px !important;
    max-height:26px !important;
  }
}