*,*::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:#1a2332;color:#e8ecf0;line-height:1.65}
img{max-width:100%;height:auto;display:block}
a{color:#ffd166;text-decoration:none}
a:hover{text-decoration:underline}
ul{list-style:none}
.container{width:min(1120px,92vw);margin:0 auto}

.site-header{position:sticky;top:0;z-index:100;background:#121820;border-bottom:2px solid #4a5568}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.7rem 0;gap:1rem}
.logo{font-weight:800;font-size:1.08rem;color:#fff;letter-spacing:.04em}
.logo span{color:#ffd166}
.nav-main{display:flex;flex-wrap:wrap;gap:.35rem 1.1rem;font-size:.88rem}
.nav-main a{color:#8a9bb0;font-weight:600}
.nav-main a.active,.nav-main a:hover{color:#ffd166;text-decoration:none}
.btn-nav{display:inline-block;background:#ffd166;color:#1a2332!important;padding:.45rem 1.05rem;font-weight:800;font-size:.85rem;text-decoration:none!important}
.btn-nav:hover{background:#ffe08a}

.section{padding:3.5rem 0}
.section-title{font-size:clamp(1.28rem,3vw,1.65rem);font-weight:800;margin-bottom:.45rem;color:#fff}
.section-lead{color:#8a9bb0;font-size:.92rem;margin-bottom:1.85rem;max-width:640px}

.footer{background:#0d1118;border-top:2px solid #4a5568;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:#ffd166;margin-bottom:.7rem}
.footer a{color:#8a9bb0}
.footer-links{display:flex;flex-wrap:wrap;gap:.4rem 1rem}
.footer-bottom{border-top:1px solid #2a3544;padding-top:1rem;text-align:center;color:#5a6a7a;font-size:.78rem}

.faq-list{display:flex;flex-direction:column;gap:.5rem}
.faq-item{background:#252d3a;border-left:4px solid #ffd166}
.faq-q{width:100%;text-align:left;padding:1rem 1.15rem;font-weight:700;font-size:.92rem;background:transparent;border:none;cursor:pointer;color:#fff;display:flex;justify-content:space-between;align-items:center;font-family:inherit}
.faq-q::after{content:"+";font-size:1.2rem;color:#ffd166;font-weight:400}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1.15rem 1rem;font-size:.88rem;color:#8a9bb0;line-height:1.7}
.faq-item.open .faq-a{display:block}

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