*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{font-size:16px;-webkit-text-size-adjust:100%}
body{font-family:"Arial","PingFang SC","Microsoft YaHei",sans-serif;color:#111;line-height:1.6;background:#f3f1ea}
img{max-width:100%;height:auto;display:block}
a{color:#111;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}
.g{width:min(1100px,92vw);margin:0 auto}

.site-header{background:#fff;border-bottom:5px solid #111;position:sticky;top:0;z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:.8rem;padding:.7rem 0}
.logo{font-weight:800;letter-spacing:.08em;font-size:.82rem}
.nav-main{display:flex;flex-wrap:wrap;gap:.35rem}
.nav-main a{border:3px solid #111;padding:.22rem .65rem;font-size:.72rem;font-weight:700;background:#fff}
.nav-main a.active{background:#e30613;color:#fff}
.btn-nav{background:#0055a5;color:#fff;border:3px solid #111;padding:.28rem .75rem;font-size:.72rem;font-weight:700}

.section{padding:2.5rem 0}
.h2{font-size:clamp(1.15rem,2.4vw,1.45rem);font-weight:800;margin-bottom:.35rem;letter-spacing:.04em}
.muted{font-size:.88rem;color:#333;max-width:38em}

.footer{background:#111;color:#fff;padding:1.8rem 0 0;font-size:.76rem;border-top:5px solid #f5d300}
.footer h3{color:#f5d300;margin-bottom:.4rem;font-size:.78rem}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:1.1rem;margin-bottom:1rem}
.footer a{color:#fff;border-bottom:2px solid #e30613}
.footer-links{display:flex;flex-wrap:wrap;gap:.3rem .7rem}
.footer-bottom{border-top:3px solid #333;padding:.7rem 0;text-align:center;font-size:.68rem}

.faq-item{border:3px solid #111;background:#fff;margin-bottom:.55rem}
.faq-q{width:100%;text-align:left;padding:.8rem 1rem;font-weight:800;font-size:.86rem;background:#fff;border:none;display:flex;justify-content:space-between}
.faq-q::after{content:"+"}
.faq-item.open .faq-q{background:#f5d300}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1rem .85rem;font-size:.82rem}
.faq-item.open .faq-a{display:block}

.btn-r{display:inline-block;background:#e30613;color:#fff;border:3px solid #111;padding:.48rem 1rem;font-weight:800;font-size:.8rem}
.btn-b{display:inline-block;background:#0055a5;color:#fff;border:3px solid #111;padding:.48rem 1rem;font-weight:800;font-size:.8rem}
.btn-y{display:inline-block;background:#f5d300;color:#111;border:3px solid #111;padding:.48rem 1rem;font-weight:800;font-size:.8rem}

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