*,*::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","Consolas",monospace,sans-serif;background:#0a1420;color:#a8c4d8;line-height:1.55}
img{max-width:100%;height:auto;display:block}
a{color:#5a9a8a;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:#061018;border-bottom:2px solid #2a4a5a}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.65rem 0;gap:1rem}
.logo{font-weight:900;font-size:.95rem;color:#5a9a8a;letter-spacing:.15em;font-family:"Consolas",monospace}
.logo::before{content:"[ ";color:#3a6a5a}
.logo::after{content:" ]";color:#3a6a5a}
.nav-main{display:flex;flex-wrap:wrap;gap:.35rem 1rem;font-size:.82rem;font-family:"PingFang SC",sans-serif}
.nav-main a{color:#5a7080;font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.nav-main a.active,.nav-main a:hover{color:#5a9a8a;text-decoration:none}
.btn-nav{display:inline-block;background:#1a3a4a;color:#5a9a8a!important;padding:.4rem .95rem;font-weight:800;font-size:.78rem;text-decoration:none!important;border:1px solid #3a6a5a;font-family:"Consolas",monospace;letter-spacing:.08em}
.btn-nav:hover{background:#2a4a5a}

.section{padding:3rem 0}
.section-title{font-size:clamp(1.15rem,2.8vw,1.45rem);font-weight:900;margin-bottom:.4rem;color:#5a9a8a;font-family:"Consolas",monospace;letter-spacing:.1em;text-transform:uppercase}
.section-lead{color:#4a6070;font-size:.86rem;margin-bottom:1.65rem;max-width:620px;font-family:"PingFang SC",sans-serif}

.footer{background:#040810;border-top:2px solid #2a4a5a;padding:2.25rem 0 0;font-size:.82rem}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2rem;margin-bottom:1.75rem}
.footer h3{font-size:.82rem;color:#5a9a8a;margin-bottom:.6rem;font-family:"Consolas",monospace;letter-spacing:.08em}
.footer a{color:#4a6070}
.footer-links{display:flex;flex-wrap:wrap;gap:.35rem .9rem}
.footer-bottom{border-top:1px solid #1a3040;padding-top:.85rem;text-align:center;color:#3a5060;font-size:.72rem;font-family:"Consolas",monospace}

.faq-list{display:flex;flex-direction:column;gap:1px;background:#2a4a5a}
.faq-item{background:#0a1828}
.faq-q{width:100%;text-align:left;padding:.85rem 1rem;font-weight:700;font-size:.84rem;background:#0a1828;border:none;cursor:pointer;color:#a8c4d8;display:flex;justify-content:space-between;align-items:center;font-family:"Consolas",monospace;letter-spacing:.04em}
.faq-q::before{content:"Q// ";color:#3a6a5a;font-weight:400}
.faq-q::after{content:"+";color:#5a9a8a;font-weight:400}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1rem .85rem;font-size:.82rem;color:#4a6070;line-height:1.6;background:#061018;font-family:"PingFang SC",sans-serif}
.faq-item.open .faq-a{display:block;padding-top:.5rem}

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