:root{
  --brand:#2f6bff; --brand-dark:#1f4fd6; --ink:#0f172a; --muted:#64748b;
  --line:#e6e8ee; --bg:#ffffff; --bg-soft:#f6f8fc; --radius:14px; --maxw:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:9px;font-weight:800;font-size:20px;letter-spacing:.2px}
.brand .dot{width:13px;height:13px;border-radius:50%;background:var(--brand);box-shadow:0 0 0 4px rgba(47,107,255,.15)}
.brand img{height:26px;width:auto;display:block}
.brand .logo-white{filter:brightness(0) invert(1);opacity:.95}
.menu{display:flex;gap:26px;align-items:center}
.menu a{color:var(--muted);font-weight:600}
.menu a:hover{color:var(--brand)}
.btn{display:inline-block;background:var(--brand);color:#fff;padding:11px 22px;border-radius:999px;font-weight:700;transition:.2s}
.btn:hover{background:var(--brand-dark);transform:translateY(-1px)}
.btn.ghost{background:transparent;color:var(--brand);border:1px solid var(--brand)}
.btn.lg{padding:14px 30px;font-size:16px}
.menu a.btn,.menu a.btn:hover{color:#fff}
.hero{position:relative;padding:110px 0 150px;background:#05080f url(img/hero-bg.jpg) center/cover no-repeat;color:#fff}
.hero h1{font-size:46px;line-height:1.14;margin:0 0 16px;font-weight:800;letter-spacing:-.5px}
.hero p.lead{font-size:19px;color:var(--muted);max-width:640px;margin:0 0 28px}
.tag{display:inline-block;font-size:13px;font-weight:700;color:var(--brand);background:rgba(47,107,255,.1);padding:5px 12px;border-radius:999px;margin-bottom:18px}
.grid{display:grid;gap:20px}
.features{grid-template-columns:repeat(3,1fr);padding:64px 0}
.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card h3{margin:0 0 8px;font-size:18px}
.card p{margin:0;color:var(--muted);font-size:15px}
.card .btn{margin-top:16px}
.section{padding:64px 0}
.section h2{font-size:32px;margin:0 0 8px;text-align:center}
.section .sub{text-align:center;color:var(--muted);margin:0 0 36px}
.platforms{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin-top:30px}
.platforms span{background:var(--bg-soft);border:1px solid var(--line);padding:8px 16px;border-radius:999px;font-size:14px;font-weight:600}
.cta{background:linear-gradient(135deg,var(--brand),#5b8bff);color:#fff;border-radius:24px;padding:56px 24px;text-align:center;margin:64px 0}
.cta h2{color:#fff;margin:0 0 12px}
.cta p{color:rgba(255,255,255,.88);margin:0 0 24px}
.cta .btn{background:#fff;color:var(--brand)}
footer.site{background:#0b1220;color:#aab3c5;padding:52px 0 28px}
footer .cols{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:28px}
footer h4{color:#fff;font-size:15px;margin:0 0 14px}
footer a{color:#aab3c5;display:block;margin:7px 0;font-size:14px}
footer a:hover{color:#fff}
footer .bottom{border-top:1px solid rgba(255,255,255,.08);margin-top:34px;padding-top:18px;font-size:13px;color:#6b7588}
.kwcloud{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin-bottom:26px}
.kwcloud .kwlabel{font-size:13px;color:#7b8499;margin-right:2px}
.kwcloud a{display:inline-block;margin:0;color:#aab3c5;font-size:13px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.1);padding:6px 13px;border-radius:999px}
.kwcloud a:hover{color:#fff;border-color:var(--brand)}
.pricing{grid-template-columns:repeat(3,1fr);align-items:stretch}
.plan{border:1px solid var(--line);border-radius:var(--radius);padding:28px;display:flex;flex-direction:column;background:var(--bg)}
.plan.featured{border-color:var(--brand);box-shadow:0 14px 34px rgba(47,107,255,.14);background:linear-gradient(180deg,#f5f8ff,#fff)}
.plan .name{font-weight:700;color:var(--muted);font-size:14px;letter-spacing:1px;text-transform:uppercase}
.plan .price{font-size:36px;font-weight:800;margin:10px 0 2px}
.plan .price small{font-size:15px;font-weight:600;color:var(--muted)}
.plan ul{list-style:none;padding:0;margin:18px 0 26px;color:var(--muted)}
.plan li{padding:8px 0;border-bottom:1px dashed var(--line);font-size:15px}
.plan li::before{content:"✓";color:var(--brand);font-weight:800;margin-right:8px}
.plan .btn{margin-top:auto;text-align:center}
.faq{max-width:840px;margin:0 auto;display:grid;gap:14px}
.faq details{border:1px solid var(--line);border-radius:12px;padding:14px 18px;background:var(--bg)}
.faq summary{font-weight:700;cursor:pointer;font-size:16px}
.faq p{margin:10px 0 0;color:var(--muted)}
.banner{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin:0 0 4px;color:var(--muted);font-size:15px}
.hero-grid{display:block}
.hero-copy{max-width:620px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}
.hero-kicker{font-size:18px;font-weight:600;color:rgba(255,255,255,.78);margin:0 0 12px;letter-spacing:2px}
.hero-h1{font-size:54px;line-height:1.1;font-weight:800;margin:0 0 18px;color:#fff;letter-spacing:-.5px}
.hero-sub{font-size:18px;color:rgba(255,255,255,.85);margin:0 0 30px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:0}
.hero .btn.ghost{color:#fff;border-color:rgba(255,255,255,.55);background:rgba(255,255,255,.06)}
.hero-note{margin:44px 0 0;font-size:12px;color:rgba(255,255,255,.45)}
.hcards{background:var(--bg);padding:26px 0 6px}
.hcards-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr 1fr 1.3fr;gap:14px}
.hcard{display:flex;align-items:center;justify-content:space-between;gap:10px;background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:16px 18px;transition:.2s}
.hcard:hover{box-shadow:0 10px 26px rgba(15,23,42,.08);transform:translateY(-2px)}
.hcard h4{margin:0 0 4px;font-size:16px;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.hcard p{margin:0;font-size:12.5px;color:var(--muted)}
.harrow{color:var(--brand);font-weight:800;font-size:20px;line-height:1}
.hbadge{font-size:11px;font-weight:700;color:#fff;background:var(--brand);padding:2px 8px;border-radius:999px}
.htag{font-size:11px;font-weight:700;color:var(--brand);background:rgba(47,107,255,.1);padding:2px 8px;border-radius:999px}
.ficon{width:42px;height:42px;margin-bottom:14px;object-fit:contain}
.fbadge{padding:9px;border-radius:12px}
.fi-blue{background:linear-gradient(135deg,#2f6bff,#5b8bff)}
.fi-green{background:linear-gradient(135deg,#16a34a,#34d399)}
.fi-rose{background:linear-gradient(135deg,#e11d48,#fb7185)}
/* 首页新板块 */
.features{padding:0}
.stats{background:linear-gradient(135deg,var(--brand),#4f7dff);color:#fff;padding:42px 0}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);text-align:center;gap:20px}
.stats b{display:block;font-size:38px;font-weight:800;letter-spacing:-.5px}
.stats span{opacity:.9;font-size:14px}
.section.alt{background:var(--bg-soft)}
.grid.tech{grid-template-columns:repeat(3,1fr);padding:0}
.tech-metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:34px}
.tech-metrics div{background:var(--bg);border:1px solid var(--line);border-radius:12px;padding:18px;text-align:center}
.tech-metrics b{display:block;font-size:26px;font-weight:800;color:var(--brand)}
.tech-metrics span{font-size:13px;color:var(--muted)}
.compat{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:760px;margin:0 auto}
.compat-col{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.compat-col h4{margin:0 0 12px;font-size:16px}
.compat-col ul{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:8px 14px}
.compat-col li{font-size:14px;color:var(--muted);padding-left:16px;position:relative}
.compat-col li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.grid.four{grid-template-columns:repeat(4,1fr)}
.sos{text-align:center;margin-top:28px;color:var(--muted);font-size:15px}
.sos a{color:var(--brand);font-weight:700;margin-left:6px}
.grid.scenarios{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.scard{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column}
.scard h3{margin:0 0 10px;font-size:19px}
.scard p{margin:0 0 16px;color:var(--muted);font-size:14.5px;flex:1}
.scard a{color:var(--brand);font-weight:700;font-size:14px}
.grid.versions{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}
.vcard{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.vcard h4{margin:0 0 8px;font-size:16px}
.vcard p{margin:0 0 14px;color:var(--muted);font-size:13.5px}
.vcard a{color:var(--brand);font-weight:700;font-size:14px}
.grid.reviews{grid-template-columns:repeat(auto-fit,minmax(290px,1fr))}
.reviews blockquote{margin:0;background:var(--bg);border:1px solid var(--line);border-left:4px solid var(--brand);border-radius:12px;padding:20px 22px;font-size:15px;color:#334155}
.reviews cite{display:block;margin-top:12px;font-style:normal;font-weight:700;color:var(--brand);font-size:13.5px}
.badges{list-style:none;padding:0;margin:36px auto 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:12px;max-width:900px}
.badges li{background:var(--bg);border:1px solid var(--line);border-radius:10px;padding:14px;text-align:center;font-size:13.5px;font-weight:600;color:#334155}
@media(max-width:860px){
  .features,.pricing{grid-template-columns:1fr}
  .hero-grid{grid-template-columns:1fr}
  .hcards-grid{grid-template-columns:1fr 1fr}
  .hero{padding:80px 0 100px}
  .menu{display:none}
  .four,.tech{grid-template-columns:1fr}
  .compat{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:1fr}
  .tech-metrics{grid-template-columns:repeat(2,1fr)}
  .hero-h1{font-size:34px}
  footer .cols{grid-template-columns:1fr 1fr}
}
.page-title{font-size:32px;margin:0 0 8px;text-align:center}