:root{--ink:#111;--muted:#555;--line:#222;--soft:#f4f1ea;--red:#c41e3a;--red-d:#9a1830;--black:#111;--cream:#f4f1ea;--max:1240px}
*{box-sizing:border-box;margin:0;padding:0}

body{font-family:Impact,"Arial Black","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--cream);line-height:1.55}
p,li,.hero-desc,.section-head p,.footer p,.footer a,.footer li,.news-item,.review-item,.faq p,.check-list,.metric span{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.container{width:min(var(--max),calc(100% - 36px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:100;background:#111;color:#fff}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:68px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:900;letter-spacing:.04em}
.brand-mark{width:40px;height:40px;display:grid;place-items:center;background:var(--red);color:#fff;font-size:14px}
.nav{display:flex;align-items:center;gap:16px;font-size:13px;font-weight:700;color:#ddd;flex-wrap:wrap;font-family:-apple-system,BlinkMacSystemFont,"Microsoft YaHei",sans-serif}
.nav a:hover,.nav-item:hover>a{color:#fff}
.nav-item{position:relative;padding:22px 0}
.dropdown{position:absolute;top:64px;left:50%;min-width:250px;padding:10px;background:#111;border:2px solid var(--red);opacity:0;visibility:hidden;display:grid;gap:4px;transform:translateX(-50%)}
.nav-item:hover .dropdown{opacity:1;visibility:visible}
.dropdown a{padding:8px 10px;font-size:13px}
.dropdown a:hover{background:var(--red);color:#fff}
.header-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-family:-apple-system,BlinkMacSystemFont,"Microsoft YaHei",sans-serif}
.contact{font-size:12px;color:#aaa}
.language{font-size:12px;padding:6px 10px;border:1px solid #444}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 22px;border:3px solid #111;font-weight:900;font-size:15px;cursor:pointer;letter-spacing:.04em}
.btn-red{background:var(--red);color:#fff;border-color:#111}
.btn-black{background:#111;color:#fff}
.btn-ghost{background:#fff;color:#111}
section{padding:52px 0;scroll-margin-top:72px}
.section-label{display:inline-block;margin-bottom:8px;background:var(--red);color:#fff;font-size:12px;font-weight:900;letter-spacing:.12em;padding:4px 8px;text-transform:uppercase}
.section-head h2{font-size:clamp(28px,4vw,44px);line-height:1.1;margin-bottom:10px;text-transform:uppercase}
.section-head p{color:var(--muted);max-width:640px;font-weight:400}
.footer{padding:48px 0 20px;background:#111;color:#ccc;margin-top:16px;font-family:-apple-system,BlinkMacSystemFont,"Microsoft YaHei",sans-serif}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr .9fr;gap:24px}
.footer h3,.footer h4{margin-bottom:12px;font-size:16px;color:#fff}
.footer p,.footer a,.footer li{color:#999;font-size:14px}
.footer ul{list-style:none;display:grid;gap:8px}
.subscribe{display:flex;gap:8px;margin-top:12px}
.subscribe input{flex:1;min-height:40px;border:2px solid #333;padding:0 12px;background:#222;color:#fff;outline:none}
.copyright{display:flex;justify-content:space-between;gap:16px;margin-top:28px;padding-top:16px;border-top:2px solid #333;font-size:13px;flex-wrap:wrap}
details.faq{border:3px solid #111;background:#fff;margin-bottom:8px}
details.faq summary{padding:14px 16px;font-weight:900;cursor:pointer;list-style:none}
details.faq summary::-webkit-details-marker{display:none}
details.faq p{padding:0 16px 14px;color:var(--muted);font-size:14px;font-weight:400}
@media(max-width:980px){.nav,.contact{display:none}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:720px){.container{width:min(100% - 24px,var(--max))}.footer-grid{grid-template-columns:1fr}.copyright{flex-direction:column}}
img[data-src]{min-height:120px;background:rgba(128,128,128,.08)}
.below-fold{content-visibility:auto;contain-intrinsic-size:auto 480px}