:root{
  --a:#3b82f6;
  --b:#60a5fa;
  --c:#93c5fd;
  --soft:#eff6ff;
  --ink:#0f172a;
  --muted:#64748b;
  --line:rgba(15,23,42,.08);
  --max:1160px;
  --radius:14px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  background:#fff;
  color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",sans-serif;
  line-height:1.75;
}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%;height:auto}
button{font:inherit;border:0;background:none;cursor:pointer}
.wrap{width:min(calc(100% - 40px),var(--max));margin:auto}

header{
  position:sticky;top:0;z-index:30;
  background:rgba(255,255,255,.82);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  border-bottom:1px solid rgba(0,0,0,.06);
}
.head{
  min-height:60px;
  display:grid;
  grid-template-columns:auto 1fr auto;
  gap:24px;
  align-items:center;
}
.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:900;color:var(--a)}
nav{display:flex;justify-content:center;gap:22px;flex-wrap:wrap}
nav a{
  font-size:15px;font-weight:600;color:#475569;
  padding:6px 0;border-bottom:2px solid transparent;
}
nav a.active,nav a:hover{color:var(--a);border-bottom-color:var(--a)}
.menu-toggle{display:none;width:42px;height:42px;border-radius:12px;background:var(--soft)}
.menu-toggle span{display:block;width:18px;height:2px;margin:4px auto;background:var(--ink)}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:50px;padding:0 28px;border-radius:14px;
  background:linear-gradient(135deg,var(--a),var(--b));
  color:#fff;font-weight:900;box-shadow:0 8px 28px rgba(59,130,246,.22);
  transition:transform .2s ease,box-shadow .2s ease;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(59,130,246,.28)}
.btn.ghost{
  background:rgba(255,255,255,.95);color:#1d4ed8;
  border:1px solid rgba(59,130,246,.18);box-shadow:0 8px 32px rgba(0,0,0,.08);
}
.btn.light{background:#fff;color:#1d4ed8;box-shadow:none}

.hero{
  padding:80px 0 60px;color:#fff;text-align:center;
  background:linear-gradient(135deg,#2563eb 0%,#3b82f6 45%,#93c5fd 100%);
}
.hero-grid{display:grid;gap:28px;justify-items:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  padding:7px 14px;border-radius:999px;
  background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.25);
  color:#fff;font-size:13px;font-weight:800;
}
.hero h1{
  margin:0;font-size:clamp(32px,5vw,44px);
  line-height:1.15;letter-spacing:-.02em;max-width:760px;
}
.hero .lead{
  margin:16px auto 0;opacity:.92;font-size:18px;max-width:640px;
}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:center;margin-top:28px}
.hero-note{margin-top:16px;opacity:.88;font-size:14px}

.stats{
  display:flex;justify-content:center;gap:48px;flex-wrap:wrap;
  padding:36px 28px;background:#dbeafe;
}
.stat{text-align:center}
.stat strong{display:block;font-size:32px;font-weight:900;color:var(--a)}
.stat span{display:block;color:var(--muted);font-size:13px;margin-top:4px}

.section{padding:56px 0}
.section.alt{background:linear-gradient(180deg,#eff6ff,#fff)}
.section-head{max-width:760px;margin-bottom:32px}
.section h2{margin:0;font-size:clamp(26px,3.2vw,30px);line-height:1.25}
.section .lead{margin:8px 0 0;color:var(--muted);font-size:16px}

.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px}
.why-card{
  padding:28px;border-radius:14px;
  background:rgba(255,255,255,.7);backdrop-filter:blur(8px);
  border:1px solid rgba(0,0,0,.06);box-shadow:0 4px 24px rgba(0,0,0,.04);
  transition:transform .2s ease,box-shadow .2s ease;
}
.why-card:hover{transform:translateY(-4px);box-shadow:0 12px 40px rgba(0,0,0,.08)}
.why-card .icon{
  width:auto;min-width:48px;height:32px;padding:0 12px;border-radius:10px;
  display:inline-flex;align-items:center;justify-content:center;
  background:var(--soft);color:var(--a);font-size:13px;font-weight:800;
}
.why-card h3{margin:14px 0 8px;font-size:18px;color:var(--a)}
.why-card p{margin:0;color:var(--muted);font-size:15px}

.timeline{
  display:flex;gap:24px;justify-content:center;flex-wrap:wrap;padding:8px 0;
}
.tl-step{
  flex:1;min-width:220px;max-width:280px;text-align:center;
  padding:28px 20px;border-radius:14px;background:#dbeafe;border:1px solid rgba(0,0,0,.04);
}
.tl-step .num{
  width:44px;height:44px;border-radius:50%;background:var(--a);color:#fff;
  display:inline-flex;align-items:center;justify-content:center;
  font-weight:900;font-size:18px;margin-bottom:12px;
}
.tl-step h4{margin:0 0 6px;font-size:18px}
.tl-step p{margin:0;color:var(--muted);font-size:14px}

.bento{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.bento-item{
  padding:32px;border-radius:14px;background:#fff;
  border:1px solid rgba(0,0,0,.06);box-shadow:0 4px 20px rgba(0,0,0,.03);
}
.bento-item.wide{grid-column:span 2}
.bento-item h3{margin:0 0 8px;color:var(--a);font-size:20px}
.bento-item p{margin:0;color:var(--muted)}
.bento-item ul{margin:10px 0 0;padding-left:18px;color:var(--muted)}
.bento-item li{margin-bottom:4px}

.compare{width:100%;border-collapse:collapse;margin-top:8px}
.compare th,.compare td{padding:12px 16px;text-align:left;border-bottom:1px solid #e5e7eb;font-size:14px}
.compare th{background:#dbeafe;color:#1d4ed8;font-weight:700}
.compare td.yes{color:var(--a);font-weight:700}

.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.news-card{
  display:block;padding:24px;border-radius:14px;background:#fff;
  border:1px solid var(--line);transition:transform .2s ease,border-color .2s ease;
}
.news-card:hover{transform:translateY(-3px);border-color:rgba(59,130,246,.35)}
.news-card time{color:var(--a);font-size:13px;font-weight:700}
.news-card h3{margin:10px 0;font-size:18px;line-height:1.35}
.news-card p{margin:0;color:var(--muted);font-size:14px}

.faq-list{display:grid;gap:12px;margin-top:20px;max-width:800px}
.faq{
  border:1px solid #e5e7eb;border-radius:10px;background:#fff;overflow:hidden;
}
.faq button{
  width:100%;text-align:left;padding:18px 20px;font-weight:800;color:#1d4ed8;
  display:flex;justify-content:space-between;gap:16px;align-items:center;
}
.faq button span{color:var(--a);font-size:22px;line-height:1}
.faq .faq-body{display:none;padding:0 20px 18px;color:var(--muted);font-size:15px}
.faq.open .faq-body{display:block}
.faq.open button span{transform:rotate(45deg)}

.cta-band{
  padding:56px 28px;text-align:center;color:#fff;
  background:linear-gradient(135deg,#1d4ed8,#3b82f6);
}
.cta-band h2{margin:0;font-size:30px;color:#fff}
.cta-band p{margin:8px auto 24px;max-width:640px;opacity:.9}
.cta-band .hero-actions{justify-content:center;margin-top:0}

.inner-hero{
  padding:64px 0 36px;color:#fff;text-align:center;
  background:linear-gradient(135deg,#2563eb 0%,#3b82f6 45%,#93c5fd 100%);
}
.inner-hero h1{margin:14px auto 0;font-size:clamp(28px,4vw,44px);line-height:1.15;max-width:760px}
.inner-hero .lead{margin:14px auto 0;opacity:.92;max-width:640px;font-size:17px}
.inner-hero .eyebrow{margin-bottom:4px}
.inner-hero .hero-actions{margin-top:24px}

.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.download-card{
  padding:28px;border-radius:14px;background:#fff;
  border:1px solid var(--line);display:grid;gap:14px;
}
.download-card .plat{
  display:inline-flex;align-items:center;justify-content:center;
  width:fit-content;min-height:32px;padding:0 12px;border-radius:10px;
  background:var(--soft);color:var(--a);font-size:13px;font-weight:800;
}
.download-card h3{margin:0;font-size:18px;color:var(--a)}
.download-card p{margin:0;color:var(--muted);font-size:14px}
.download-card .btn{width:100%}

.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 260px;gap:36px;align-items:start}
.article{padding:28px;border-radius:14px;background:#fff;border:1px solid var(--line)}
.article .meta{color:var(--muted);font-size:14px;margin-bottom:18px}
.article h2{margin:28px 0 10px;font-size:24px;color:#1d4ed8}
.article p,.article li{color:var(--muted);font-size:16px;line-height:1.95}
.article ol,.article ul{padding-left:22px}
.side{position:sticky;top:84px;padding:22px;border-radius:14px;background:#fff;border:1px solid var(--line)}
.side h3{margin:0 0 12px;font-size:18px;color:var(--a)}
.side a{display:block;padding:8px 0;color:var(--muted);font-size:14px}
.side a:hover{color:var(--a)}

.daily-box{
  margin-top:8px;padding:24px;border-radius:14px;
  background:linear-gradient(135deg,#eff6ff,#dbeafe);border:1px solid var(--line);
}
.daily-box .tag{color:var(--a);font-size:13px;font-weight:800}
.daily-box h3{margin:8px 0;font-size:22px}
.daily-box p{margin:0;color:var(--muted)}

.sitemap-list{display:grid;gap:10px;margin-top:20px}
.sitemap-list a{
  display:flex;justify-content:space-between;gap:16px;padding:16px 18px;
  border-radius:10px;background:#fff;border:1px solid var(--line);color:var(--muted);
}
.sitemap-list a:hover{border-color:rgba(59,130,246,.35);color:var(--a)}

footer{padding:28px;text-align:center;background:#0f172a;color:#94a3b8;font-size:14px;margin-top:0}
.foot{
  display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px;
  text-align:left;max-width:var(--max);margin:0 auto 8px;padding:26px 0 10px;
}
.foot .brand{color:#fff}
.foot .brand span{color:#fff}
.foot p,.foot a{color:#94a3b8;font-size:13px}
.foot a{display:block;padding:5px 0}
.foot h4{margin:0 0 12px;color:#fff;font-size:15px}
.copyright{
  text-align:center;padding:18px 0 0;color:#64748b;
  border-top:1px solid rgba(255,255,255,.06);
}

@media (max-width:860px){
  .menu-toggle{display:grid;place-content:center}
  nav{
    display:none;position:absolute;left:20px;right:20px;top:60px;
    background:#fff;border:1px solid var(--line);border-radius:14px;
    padding:14px;flex-direction:column;gap:12px;box-shadow:0 18px 40px rgba(15,23,42,.08);
  }
  nav.open{display:flex}
  .head{grid-template-columns:auto auto;justify-content:space-between}
  .head>.btn{display:none}
  .why-grid,.news-grid,.download-grid,.bento,.article-layout,.foot{grid-template-columns:1fr}
  .bento-item.wide{grid-column:span 1}
  .stats{gap:24px}
  .hero h1{font-size:30px}
}