*,*::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:1.55;background:#fff}
img{max-width:100%;height:auto;display:block}
a{color:#111;text-decoration:none}
ul{list-style:none}
button{font-family:inherit;cursor:pointer}
.w{width:min(1080px,92vw);margin:0 auto}
.site-header{background:#111;color:#fff;border-bottom:8px solid #fff;outline:4px solid #111;position:sticky;top:0;z-index:20}
.header-inner{display:flex;align-items:center;justify-content:space-between;padding:.7rem 0;gap:.8rem}
.logo{font-weight:900;letter-spacing:.12em;font-size:.8rem;color:#fff}
.nav-main{display:flex;flex-wrap:wrap;gap:.4rem}
.nav-main a{border:3px solid #fff;padding:.2rem .6rem;font-size:.7rem;font-weight:800;color:#fff}
.nav-main a.active{background:#fff;color:#111}
.btn-nav{background:#fff;color:#111;border:3px solid #111;padding:.28rem .7rem;font-size:.72rem;font-weight:800}
.section{padding:2.4rem 0}
.h2{font-size:1.25rem;font-weight:900;margin-bottom:.35rem}
.footer{background:#111;color:#fff;padding:1.8rem 0 0;font-size:.76rem}
.footer-grid{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:1rem;margin-bottom:1rem}
.footer h3{margin-bottom:.35rem}
.footer a{color:#fff;border-bottom:2px solid #fff}
.footer-links{display:flex;flex-wrap:wrap;gap:.3rem .7rem}
.footer-bottom{border-top:3px solid #fff;padding:.7rem 0;text-align:center;font-size:.68rem}
.faq-item{border:4px solid #111;margin-bottom:.5rem;background:#fff}
.faq-q{width:100%;text-align:left;padding:.8rem 1rem;font-weight:800;background:#fff;border:none;display:flex;justify-content:space-between}
.faq-q::after{content:"+"}
.faq-item.open .faq-q{background:#111;color:#fff}
.faq-item.open .faq-q::after{content:"−"}
.faq-a{display:none;padding:0 1rem .8rem;font-size:.82rem}
.faq-item.open .faq-a{display:block}
.btn{display:inline-block;background:#111;color:#fff;padding:.48rem 1rem;font-weight:800;font-size:.8rem;border:3px solid #111}
@media(max-width:768px){.header-inner{flex-wrap:wrap}.footer-grid{grid-template-columns:1fr}}