*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:"PingFang SC","Microsoft YaHei",sans-serif;background:#0a0e27;color:#e8ecf8;line-height:1.65;min-height:100vh}
img{max-width:100%;height:auto;display:block}
a{color:#7eb8ff;text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
.container{width:min(1140px,92vw);margin:0 auto}

.site-header{position:sticky;top:0;z-index:100;background:#0f1535;border-bottom:1px solid #2a3566}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.7rem 0;gap:1rem}
.logo{font-weight:800;font-size:1.1rem;color:#e8ecf8;letter-spacing:.04em}
.logo em{font-style:normal;color:#7eb8ff}
.nav-main{display:flex;flex-wrap:wrap;gap:.35rem 1.1rem;font-size:.88rem}
.nav-main a{color:#8892b0;font-weight:600}
.nav-main a.active,.nav-main a:hover{color:#7eb8ff;text-decoration:none}
.btn-nav{display:inline-block;background:#4f7cff;color:#fff!important;padding:.45rem 1rem;font-weight:700;font-size:.85rem;border-radius:3px;text-decoration:none!important}
.btn-nav:hover{background:#3d66e0}

.section{padding:3.5rem 0}
.section-title{font-size:clamp(1.3rem,3vw,1.7rem);font-weight:800;margin-bottom:.45rem;color:#e8ecf8}
.section-lead{color:#8892b0;font-size:.92rem;margin-bottom:2rem;max-width:620px}

.footer{background:#060a1a;border-top:1px solid #2a3566;padding:2.5rem 0 1.5rem;font-size:.86rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem;margin-bottom:2rem}
.footer h3{font-size:.92rem;color:#7eb8ff;margin-bottom:.7rem}
.footer a{color:#8892b0}
.footer-links{display:flex;flex-wrap:wrap;gap:.4rem 1rem}
.footer-bottom{border-top:1px solid #1a2456;padding-top:1rem;text-align:center;color:#5a6488;font-size:.78rem}

@media(max-width:768px){
  .header-inner{flex-direction:column;align-items:flex-start}
  .footer-grid{grid-template-columns:1fr}
}