*,*::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","Segoe UI",sans-serif;background:#050a14;color:#c8dce8;line-height:1.65;min-height:100vh}
img{max-width:100%;height:auto;display:block}
a{color:#4dd9ff;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:#0a1520;border-bottom:1px solid #1a3a52}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.75rem 0;gap:1rem}
.logo{font-weight:900;font-size:1.05rem;color:#e8f4fc;letter-spacing:.05em;display:flex;align-items:center;gap:.55rem}
.logo-trident{width:20px;height:22px;position:relative;filter:drop-shadow(0 0 6px #00ffd5)}
.logo-trident::before{content:"";position:absolute;left:50%;top:0;width:2px;height:14px;background:#00ffd5;transform:translateX(-50%);box-shadow:0 0 8px #00ffd5}
.logo-trident::after{content:"";position:absolute;bottom:0;left:2px;width:16px;height:2px;background:#00ffd5;box-shadow:-4px -6px 0 0 #00ffd5,4px -6px 0 0 #00ffd5,0 0 8px #00ffd5}
.nav-main{display:flex;flex-wrap:wrap;gap:.35rem 1.1rem;font-size:.88rem}
.nav-main a{color:#6a8fa8;font-weight:600}
.nav-main a.active,.nav-main a:hover{color:#00ffd5;text-decoration:none}
.btn-nav{display:inline-block;background:#0d3048;color:#00ffd5!important;border:1px solid #00ffd5;padding:.45rem 1.05rem;font-weight:800;font-size:.85rem;text-decoration:none!important}
.btn-nav:hover{background:#123d58}

.section{padding:3.5rem 0}
.section-title{font-size:clamp(1.25rem,3vw,1.65rem);font-weight:900;margin-bottom:.4rem;color:#e8f4fc;letter-spacing:.03em}
.section-lead{color:#6a8fa8;font-size:.92rem;margin-bottom:1.85rem;max-width:640px}

.footer{background:#030810;border-top:1px solid #1a3a52;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:#00ffd5;margin-bottom:.7rem;font-weight:800}
.footer a{color:#6a8fa8}
.footer-links{display:flex;flex-wrap:wrap;gap:.4rem 1rem}
.footer-bottom{border-top:1px solid #142838;padding-top:1rem;text-align:center;color:#4a6478;font-size:.78rem}

.faq-list{display:flex;flex-direction:column;gap:.55rem}
.faq-item{background:#0a1520;border:1px solid #1a3a52;border-left:3px solid #00ffd5}
.faq-q{width:100%;text-align:left;padding:1rem 1.15rem;font-weight:800;font-size:.92rem;background:transparent;border:none;cursor:pointer;color:#e8f4fc;display:flex;justify-content:space-between;align-items:center}
.faq-q::after{content:"+";font-size:1.2rem;color:#00ffd5;font-weight:400}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1.15rem 1rem;font-size:.88rem;color:#6a8fa8;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}
}