:root{
  --navy:#050b1d; --navy-2:#0a1430; --panel:#0f1c3d; --line:rgba(255,255,255,.1);
  --brand:#2f7bff; --brand-2:#19d3ff; --ink:#eaf0ff; --dim:#9fb0d4; --radius:16px;
  --wrap:1160px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--navy);color:var(--ink);
  font-family:"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,-apple-system,Arial,sans-serif;
  line-height:1.7;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul{margin:0;padding:0;list-style:none}
h1,h2,h3{line-height:1.25;margin:0 0 .6em;letter-spacing:-.01em}
h1{font-size:clamp(2rem,4.6vw,3.4rem)}
h2{font-size:clamp(1.5rem,2.8vw,2.2rem)}
h3{font-size:1.1rem}
p{margin:0 0 1em}
.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 20px}
.lead{color:var(--dim);font-size:1.05rem;max-width:62ch}

/* header */
.site-header{position:sticky;top:0;z-index:20;background:rgba(5,11,29,.82);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;gap:24px;height:72px}
.logo{display:flex;align-items:center;gap:10px;font-weight:700;font-size:1.15rem}
.main-nav{display:flex;gap:26px;margin-inline-start:auto}
.nav-link{color:var(--dim);font-size:.95rem;padding:6px 0;border-bottom:2px solid transparent;transition:.2s}
.nav-link:hover{color:#fff;border-color:var(--brand)}
.header-actions{display:flex;align-items:center;gap:14px}
.lang-switch{font-size:.9rem;color:var(--dim);border:1px solid var(--line);padding:6px 12px;border-radius:999px}
.lang-switch:hover{color:#fff;border-color:var(--brand)}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 22px;border-radius:999px;font-weight:600;font-size:.95rem;transition:transform .2s,box-shadow .2s,background .2s}
.btn-primary{background:linear-gradient(120deg,var(--brand),var(--brand-2));color:#03102b;box-shadow:0 10px 24px -12px var(--brand)}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--brand);color:#fff}
.btn-light{background:#fff;color:#08132c}
.btn-light:hover{transform:translateY(-2px)}
.btn-lg{padding:14px 30px;font-size:1rem}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 0}

/* hero */
.hero{position:relative;overflow:hidden;padding:84px 0 96px;
  background:radial-gradient(1000px 520px at 80% -10%,rgba(47,123,255,.35),transparent 60%),
             radial-gradient(700px 420px at 5% 20%,rgba(25,211,255,.16),transparent 60%),var(--navy)}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{text-transform:uppercase;letter-spacing:.18em;font-size:.75rem;color:var(--brand-2);margin-bottom:14px}
.hero-art img{border-radius:22px;border:1px solid var(--line);box-shadow:0 40px 80px -40px rgba(0,0,0,.9)}
.stats{display:flex;gap:34px;margin-top:38px;flex-wrap:wrap}
.stats strong{display:block;font-size:1.5rem;color:#fff}
.stats span{font-size:.85rem;color:var(--dim)}

/* sections */
.sec{padding:76px 0}
.sec.alt{background:var(--navy-2)}
.page-head{padding:72px 0 20px;background:radial-gradient(800px 380px at 20% -20%,rgba(47,123,255,.28),transparent 65%)}
.crumb{max-width:var(--wrap);margin:0 auto;padding:18px 20px 0;font-size:.85rem;color:var(--dim);display:flex;gap:8px}
.crumb a:hover{color:#fff}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}
.card{background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,.02));border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.card:hover{transform:translateY(-4px);border-color:rgba(47,123,255,.6)}
.card h3{color:#fff}
.card p{color:var(--dim);margin:0;font-size:.95rem}

.split{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:center}
.split.reverse .split-media{order:2}
.split-media img{border-radius:20px;border:1px solid var(--line)}
.ticks{margin:18px 0 26px;display:grid;gap:10px}
.ticks li{position:relative;padding-inline-start:26px;color:var(--dim)}
.ticks li::before{content:"";position:absolute;inset-inline-start:0;top:.62em;width:9px;height:9px;border-radius:50%;background:linear-gradient(120deg,var(--brand),var(--brand-2))}

.promo{padding:56px 0;background:linear-gradient(120deg,#1743a8,#2f7bff 55%,#19d3ff)}
.promo-inner{display:flex;gap:32px;align-items:center;justify-content:space-between;flex-wrap:wrap}
.promo h2,.promo .lead{color:#fff}
.promo .lead{opacity:.9;margin:0}

.faq{margin-top:30px;display:grid;gap:12px;max-width:860px}
.faq details{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;padding:16px 20px}
.faq summary{cursor:pointer;font-weight:600;color:#fff}
.faq p{color:var(--dim);margin:12px 0 0}
.more a{color:var(--brand-2);font-weight:600}

/* footer */
.site-footer{background:#030815;border-top:1px solid var(--line);padding:56px 0 24px;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:32px}
.footer-about{color:var(--dim);font-size:.92rem;max-width:34ch}
.foot-h{font-size:.95rem;color:#fff;margin-bottom:14px}
.site-footer ul{display:grid;gap:10px}
.site-footer a{color:var(--dim);font-size:.92rem}
.site-footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid var(--line);margin-top:40px;padding-top:20px}
.footer-bottom p{color:#6c7fa5;font-size:.85rem;margin:0}

@media (max-width:960px){
  .hero-inner,.split{grid-template-columns:1fr}
  .split.reverse .split-media{order:0}
  .cards{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
  .main-nav{display:none}
}
@media (max-width:600px){
  .cards{grid-template-columns:1fr}
  .hero{padding:56px 0 64px}
  .sec{padding:56px 0}
}

/* social share */
.share-sec{padding:56px 0}
.share-box{border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;
  background:linear-gradient(135deg,rgba(47,123,255,.14),rgba(25,211,255,.06));text-align:center}
.share-h{font-size:1.15rem;margin:0 0 16px}
.share-btns{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.share-btn{display:inline-flex;align-items:center;gap:8px;cursor:pointer;font:inherit;font-size:.92rem;
  font-weight:600;color:var(--ink);background:rgba(255,255,255,.06);border:1px solid var(--line);
  padding:10px 20px;border-radius:999px;transition:transform .2s,border-color .2s,background .2s}
.share-btn:hover{transform:translateY(-2px);border-color:var(--brand);background:rgba(47,123,255,.18)}
.share-btn .ic{font-size:1.05rem;line-height:1}
.share-btn.wx:hover{border-color:#4ad17c}
.share-btn.wb:hover{border-color:#ff6a6a}
.share-tip{margin:14px 0 0;font-size:.88rem;color:var(--brand-2)}

/* split media + faq (generated markup) */
.split > div img{border-radius:20px;border:1px solid var(--line)}
.split.reverse > div:first-child{order:2}
.faq-list{margin-top:30px;display:grid;gap:12px;max-width:860px}
details.faq{background:rgba(255,255,255,.04);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin:0}
details.faq summary{cursor:pointer;font-weight:600;color:#fff}
details.faq p{color:var(--dim);margin:12px 0 0}
@media(max-width:900px){.split.reverse > div:first-child{order:0}}