*,*::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:#f4f7fb;color:#1a3050;line-height:1.65}
img{max-width:100%;height:auto;display:block}
a{color:#1e4a7a;text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
.container{width:min(1080px,92vw);margin:0 auto}

.site-header{background:#1e4a7a;color:#fff}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0;gap:1rem}
.logo{font-weight:800;font-size:1.08rem;color:#fff;letter-spacing:.03em}
.logo small{display:block;font-size:.65rem;font-weight:600;color:#a8c4e0;letter-spacing:.12em;margin-top:.1rem}
.nav-main{display:flex;flex-wrap:wrap;gap:.35rem 1.25rem;font-size:.88rem}
.nav-main a{color:#c8d8ec;font-weight:600}
.nav-main a.active,.nav-main a:hover{color:#fff;text-decoration:none}
.btn-nav{display:inline-block;background:#fff;color:#1e4a7a!important;padding:.45rem 1.1rem;font-weight:700;font-size:.85rem;text-decoration:none!important}
.btn-nav:hover{background:#e8f0f8}

.section{padding:3.5rem 0}
.section-title{font-size:clamp(1.28rem,3vw,1.6rem);font-weight:800;margin-bottom:.45rem;color:#1e4a7a}
.section-lead{color:#5a7090;font-size:.92rem;margin-bottom:1.85rem;max-width:620px}

.footer{background:#1e4a7a;color:#c8d8ec;padding:2.5rem 0 0;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:#fff;margin-bottom:.7rem;font-weight:700}
.footer a{color:#a8c4e0}
.footer-links{display:flex;flex-wrap:wrap;gap:.4rem 1rem}
.footer-bottom{border-top:1px solid rgba(255,255,255,.15);padding-top:1rem;text-align:center;color:#8aa8c8;font-size:.78rem}

.faq-list{display:flex;flex-direction:column;gap:.5rem}
.faq-item{background:#fff;border:1px solid #d0dce8;border-radius:4px;overflow:hidden}
.faq-q{width:100%;text-align:left;padding:1rem 1.2rem;font-weight:700;font-size:.92rem;background:#fff;border:none;cursor:pointer;color:#1a3050;display:flex;justify-content:space-between;align-items:center;font-family:inherit}
.faq-q::after{content:"+";font-size:1.1rem;color:#1e4a7a;font-weight:400;width:24px;height:24px;border:1px solid #d0dce8;border-radius:50%;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.faq-item.open .faq-q{background:#f4f7fb}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1.2rem 1rem;font-size:.88rem;color:#5a7090;line-height:1.7;border-top:1px solid #e8eef4}
.faq-item.open .faq-a{display:block;padding-top:.85rem}

@media(max-width:768px){
  .header-inner{flex-wrap:wrap}
  .footer-grid{grid-template-columns:1fr}
}