:root{--ink:#121a33;--muted:#5c6b88;--line:#dfe6f2;--soft:#f3f6fc;--panel:#fff;--violet:#6d5efc;--violet-d:#4f46e5;--cyan:#22b8cf;--pink:#ec4899;--amber:#f59e0b;--radius:14px;--max:1240px;--shadow:0 8px 24px rgba(18,26,51,.06)}
*{box-sizing:border-box;margin:0;padding:0}

body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--soft);line-height:1.65}
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:#fff;border-bottom:1px solid var(--line)}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:14px;min-height:74px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:900}
.brand-mark{width:42px;height:42px;border-radius:12px;display:grid;place-items:center;background:var(--violet-d);color:#fff;font-size:12px;font-weight:900}
.nav{display:flex;align-items:center;gap:20px;font-size:14px;font-weight:700;color:var(--muted);flex-wrap:wrap}
.nav a:hover,.nav-item:hover>a{color:var(--violet-d)}
.nav-item{position:relative;padding:24px 0}
.dropdown{position:absolute;top:70px;left:50%;min-width:270px;padding:10px;border:1px solid var(--line);border-radius:14px;background:#fff;opacity:0;visibility:hidden;display:grid;gap:4px;transform:translateX(-50%)}
.nav-item:hover .dropdown{opacity:1;visibility:visible}
.dropdown a{padding:8px 10px;border-radius:8px;font-size:13px;font-weight:600}
.dropdown a:hover{background:var(--soft);color:var(--violet-d)}
.header-actions{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.contact{font-size:12px;color:var(--muted)}
.language{font-size:12px;padding:6px 10px;border:1px solid var(--line);border-radius:999px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 20px;border:1px solid transparent;border-radius:999px;font-weight:800;font-size:14px;cursor:pointer}
.btn-violet{background:var(--violet-d);color:#fff}
.btn-cyan{background:var(--cyan);color:#fff}
.btn-ghost{background:#fff;border-color:var(--line);color:var(--ink)}
.btn-amber{background:var(--amber);color:#fff}
section{padding:56px 0;scroll-margin-top:76px}
.section-label{display:inline-block;margin-bottom:8px;color:var(--violet-d);font-size:12px;font-weight:900;letter-spacing:.12em;text-transform:uppercase}
.section-head h2{font-size:clamp(26px,3.6vw,40px);line-height:1.18;margin-bottom:10px}
.section-head p{color:var(--muted);max-width:640px}
.tag{display:inline-block;padding:7px 14px;border-radius:999px;font-size:13px;font-weight:700;border:1px solid var(--line);background:#fff;color:var(--ink);white-space:nowrap}
.tag.t1{font-size:11px;padding:5px 10px;opacity:.85}
.tag.t2{font-size:13px}
.tag.t3{font-size:15px;padding:9px 16px;border-color:#c4b5fd;background:#ede9fe;color:#4338ca}
.tag.t4{font-size:17px;padding:10px 18px;background:#ede9fe;border-color:#ddd6fe;font-weight:900}
.footer{padding:56px 0 24px;border-top:1px solid var(--line);background:#fff;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.2fr .8fr .8fr .9fr;gap:28px}
.footer h3,.footer h4{margin-bottom:12px;font-size:16px}
.footer p,.footer a,.footer li{color:var(--muted);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:1px solid var(--line);border-radius:999px;padding:0 14px;outline:none}
.copyright{display:flex;justify-content:space-between;gap:16px;margin-top:32px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted);flex-wrap:wrap}
.faq-item{border:1px solid var(--line);border-radius:var(--radius);background:#fff;margin-bottom:10px;overflow:hidden}
.faq-q{width:100%;text-align:left;padding:16px 18px;background:#fff;border:0;font:inherit;font-weight:800;cursor:pointer;display:flex;justify-content:space-between;gap:12px}
.faq-a{display:none;padding:0 18px 16px;color:var(--muted);font-size:14px}
.faq-item.open .faq-a{display:block}
@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}