:root{
  --blue:#2AABEE;
  --blue-deep:#1F93D4;
  --blue-soft:#EAF6FE;
  --navy:#17212B;
  --ink:#24303C;
  --muted:#64748B;
  --line:#E3EDF5;
  --card:#ffffff;
  --bg-top:#F4F9FD;
  --bg-bottom:#DFEEF9;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:linear-gradient(180deg,var(--bg-top) 0%,var(--bg-bottom) 100%);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
body:has(.mobile-cta){padding-bottom:72px}
a{text-decoration:none;color:inherit}
.container{max-width:1120px;margin:0 auto;padding:0 20px}
.hl{color:var(--blue)}

/* Header */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.86);
  backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:20px;color:var(--navy)}
.logo-plane{
  display:grid;place-items:center;width:36px;height:36px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;
  box-shadow:0 4px 12px rgba(42,171,238,.35);
}
.logo-text{letter-spacing:.5px}
.logo-dot{color:var(--blue)}
.main-nav{display:flex;align-items:center;gap:26px}
.main-nav a{font-size:15px;color:#3a4a5a;transition:color .15s}
.main-nav a:hover{color:var(--blue)}
.main-nav .nav-buy{
  background:var(--blue);color:#fff;padding:8px 18px;border-radius:20px;
  font-weight:600;transition:background .15s,transform .15s;
}
.main-nav .nav-buy:hover{background:var(--blue-deep);color:#fff}
.nav-toggle{
  display:none;border:none;background:none;font-size:26px;color:var(--navy);
  cursor:pointer;line-height:1;
}

/* Hero */
.hero{padding:64px 0 56px}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:44px;align-items:center}
.hero-eyebrow{
  display:inline-block;background:var(--blue-soft);color:var(--blue-deep);
  font-size:13px;font-weight:600;padding:5px 14px;border-radius:20px;margin-bottom:16px;
}
.hero h1{font-size:40px;line-height:1.25;color:var(--navy);font-weight:800;letter-spacing:.5px}
.hero-sub{margin:18px 0 26px;color:var(--muted);font-size:16px;max-width:560px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-block;padding:13px 28px;border-radius:24px;font-size:16px;font-weight:600;
  cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;
}
.btn-primary{
  background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;
  box-shadow:0 6px 18px rgba(42,171,238,.38);
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(42,171,238,.45)}
.btn-ghost{background:#fff;color:var(--blue-deep);border:1.5px solid var(--blue)}
.btn-ghost:hover{background:var(--blue-soft)}
.hero-stats{display:flex;gap:34px;list-style:none;margin-top:30px;flex-wrap:wrap}
.hero-stats li{display:flex;flex-direction:column}
.hero-stats strong{font-size:20px;color:var(--navy);font-weight:800}
.hero-stats span{font-size:13px;color:var(--muted)}

/* Hero visual */
.hero-visual{position:relative}
.sky{
  position:relative;height:340px;border-radius:26px;overflow:hidden;
  background:linear-gradient(160deg,#DCEFFC 0%,#BFE3F8 45%,#9ED4F5 100%);
  box-shadow:0 18px 40px rgba(42,171,238,.22);
}
.sky::before{
  content:"";position:absolute;inset:0;
  background-image:radial-gradient(circle at 20% 30%,rgba(255,255,255,.7) 0,rgba(255,255,255,0) 34%),
                   radial-gradient(circle at 78% 22%,rgba(255,255,255,.6) 0,rgba(255,255,255,0) 30%),
                   radial-gradient(circle at 55% 75%,rgba(255,255,255,.55) 0,rgba(255,255,255,0) 32%);
}
.plane{position:absolute;color:#fff;filter:drop-shadow(0 6px 10px rgba(23,33,43,.18))}
.plane-a{width:120px;height:120px;top:34px;left:42%;transform:rotate(-18deg)}
.plane-b{width:56px;height:56px;bottom:34px;right:16%;transform:rotate(14deg);opacity:.9}
.sky-ring{position:absolute;border:2px solid rgba(255,255,255,.6);border-radius:50%}
.ring-1{width:200px;height:200px;top:60px;left:-40px}
.ring-2{width:120px;height:120px;bottom:20px;right:-20px}
.sky-card{
  position:absolute;background:#fff;color:var(--navy);font-weight:600;font-size:14px;
  padding:10px 16px;border-radius:14px;box-shadow:0 10px 24px rgba(23,33,43,.14);
}
.card-1{top:42px;left:12%}
.card-2{top:52%;left:54%}
.card-3{bottom:34px;left:14%}

/* Sections */
section{padding:56px 0}
.section-head{text-align:center;max-width:680px;margin:0 auto 40px}
.section-head h2{font-size:30px;color:var(--navy);font-weight:800;letter-spacing:.5px}
.section-head p{color:var(--muted);margin-top:10px}

/* Types */
.card-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.type-card{
  position:relative;background:var(--card);border-radius:18px;padding:26px 22px;
  box-shadow:0 8px 24px rgba(23,33,43,.06);border:1px solid var(--line);
  display:flex;flex-direction:column;transition:transform .18s,box-shadow .18s;
}
.type-card:hover{transform:translateY(-4px);box-shadow:0 16px 34px rgba(23,33,43,.1)}
.tag{
  position:absolute;top:16px;right:16px;background:var(--blue-soft);color:var(--blue-deep);
  font-size:12px;font-weight:700;padding:3px 10px;border-radius:12px;
}
.tag-hot{background:#FFF1E6;color:#E07B1F}
.type-card h3{font-size:18px;color:var(--navy);font-weight:700}
.type-card .region{font-size:13px;color:var(--blue-deep);margin-top:4px}
.type-card .desc{font-size:14px;color:var(--muted);margin:12px 0 18px;flex:1}
.price{font-size:26px;color:var(--navy);font-weight:800;margin-bottom:16px}
.price em{font-size:14px;color:var(--muted);font-weight:400;font-style:normal}
.btn-card{
  background:var(--blue);color:#fff;text-align:center;border-radius:22px;padding:11px 0;
  font-weight:600;font-size:15px;transition:background .15s;
}
.btn-card:hover{background:var(--blue-deep)}
.types-note{text-align:center;color:var(--muted);font-size:13px;margin-top:22px}

/* Why */
.feature-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.feature{
  background:var(--card);border-radius:18px;padding:26px 22px;border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(23,33,43,.05);
}
.feature-icon{
  display:grid;place-items:center;width:46px;height:46px;border-radius:14px;font-size:22px;
  background:var(--blue-soft);margin-bottom:14px;
}
.feature h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.feature p{font-size:14px;color:var(--muted)}
.flow{
  display:flex;align-items:center;justify-content:center;gap:18px;margin-top:36px;
  background:var(--card);border:1px solid var(--line);border-radius:18px;padding:24px;
  flex-wrap:wrap;
}
.flow-step{text-align:center;min-width:150px}
.flow-num{
  display:grid;place-items:center;width:38px;height:38px;margin:0 auto 10px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue),var(--blue-deep));color:#fff;font-weight:700;
}
.flow-step h4{font-size:15px;color:var(--navy)}
.flow-step p{font-size:13px;color:var(--muted)}
.flow-arrow{color:var(--blue);font-size:22px}

/* Scene */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene-item{
  background:var(--card);border-radius:18px;padding:26px 22px;border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(23,33,43,.05);text-align:center;
}
.scene-item span{font-size:30px;display:block;margin-bottom:12px}
.scene-item h3{font-size:16px;color:var(--navy);margin-bottom:8px}
.scene-item p{font-size:13.5px;color:var(--muted)}

/* Guide */
.article-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.post{
  background:var(--card);border-radius:18px;padding:28px;border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(23,33,43,.05);
}
.post h3{font-size:18px;color:var(--navy);margin-bottom:12px;line-height:1.45}
.post p{font-size:14.5px;color:#45586b;margin-bottom:12px}
.post p:last-child{margin-bottom:0}

/* FAQ */
.faq-list{max-width:820px;margin:0 auto}
.faq-list details{
  background:var(--card);border:1px solid var(--line);border-radius:14px;
  margin-bottom:12px;overflow:hidden;
}
.faq-list summary{
  padding:16px 20px;cursor:pointer;font-weight:600;color:var(--navy);font-size:15.5px;
  list-style:none;position:relative;
}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list summary::after{
  content:"+";position:absolute;right:20px;top:50%;transform:translateY(-50%);
  color:var(--blue);font-size:22px;font-weight:700;
}
.faq-list details[open] summary::after{content:"–"}
.faq-list details p{padding:0 20px 18px;color:var(--muted);font-size:14.5px}

/* After */
.after-box{
  background:linear-gradient(135deg,var(--navy) 0%,#20364a 100%);
  border-radius:22px;padding:44px;color:#DCE9F3;text-align:center;
}
.after-box h2{color:#fff;font-size:26px;margin-bottom:16px}
.after-box p{max-width:720px;margin:0 auto 14px;font-size:14.5px;color:#B7CAD8}
.after-box strong{color:#fff}
.after-box .btn{margin-top:10px}

/* Footer */
.site-footer{background:#0E1A26;color:#8FA6B8;padding:44px 0;text-align:center}
.footer-brand{color:#fff;font-weight:600;margin-bottom:18px}
.hot-search{font-size:12.5px;line-height:2;color:#6E8395;max-width:900px;margin:0 auto 20px}
.copyright{font-size:12.5px;color:#5C7183}

/* Mobile CTA */
.mobile-cta{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:60;
  background:rgba(255,255,255,.96);backdrop-filter:blur(8px);
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));border-top:1px solid var(--line);
}
.mobile-cta .btn{width:100%;text-align:center}

@media (max-width:960px){
  .card-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:640px){
  .hero-inner{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .hero-visual{display:none}
  .main-nav{
    display:none;position:absolute;top:64px;left:0;right:0;background:#fff;
    flex-direction:column;align-items:flex-start;gap:0;padding:8px 20px 20px;
    border-bottom:1px solid var(--line);box-shadow:0 12px 24px rgba(23,33,43,.08);
  }
  .main-nav.open{display:flex}
  .main-nav a{padding:12px 0;width:100%;border-bottom:1px solid var(--line)}
  .main-nav .nav-buy{margin-top:12px;text-align:center;border-bottom:none}
  .nav-toggle{display:block}
  .card-grid,.feature-grid,.article-grid,.scene-grid{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .flow{flex-direction:column}
  .flow-arrow{transform:rotate(90deg)}
  .mobile-cta{display:block}
  .after-box{padding:30px 20px}
}
html:not(.loin) body {
            filter: blur(10px);
            -webkit-filter: blur(10px);
        }
        body {
            transition: filter 0.5s ease, opacity 0.5s ease;
        }