:root{
  --sky:#d8ecfb;
  --cloud:#fff;
  --ink:#1a3148;
  --mute:#5b7388;
  --blue:#3d8fd6;
  --line:rgba(61,143,214,.22);
  --max:1140px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);
  font:16px/1.7 "Microsoft YaHei","Segoe UI",sans-serif;
  background:
    radial-gradient(circle at 12% 18%,#fff 0 90px,transparent 91px),
    radial-gradient(circle at 78% 8%,#fff 0 120px,transparent 121px),
    radial-gradient(circle at 92% 42%,rgba(255,255,255,.9) 0 80px,transparent 81px),
    linear-gradient(180deg,#eaf5ff 0%,#d5e9f8 42%,#cfe3f4 100%);
}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{width:min(var(--max),calc(100% - 40px));margin:auto;position:relative;z-index:1}
nav{
  position:sticky;top:0;z-index:20;height:72px;
  background:rgba(255,255,255,.72);backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.nav,.hero-grid,.split,.visual,.faq-layout,.help-layout,.cta-in,.footer{display:grid;gap:28px;align-items:center}
.nav{height:72px;grid-template-columns:auto 1fr auto}
.brand{display:flex;align-items:center;gap:8px;font-weight:900}
.brand b{width:30px;height:30px;display:grid;place-items:center;background:var(--blue);color:#fff;border-radius:50%}
.links{display:flex;justify-content:center;gap:26px;font-size:14px}
.button{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:44px;padding:0 18px;font-weight:800;color:#fff;background:var(--blue);
  border-radius:999px;box-shadow:0 10px 24px rgba(61,143,214,.28);
}
.button.ghost{background:#fff;color:var(--blue);border:1px solid var(--line);box-shadow:none}
.float{
  background:#fff;border-radius:18px;
  box-shadow:0 18px 50px rgba(80,120,160,.16);
  animation:bob 6s ease-in-out infinite;
}
@keyframes bob{50%{transform:translateY(-8px)}}
.hero{padding:48px 0 72px}
.hero-grid{grid-template-columns:1.05fr .95fr;min-height:560px}
.eyebrow{color:var(--blue);font-size:12px;font-weight:800;letter-spacing:1.5px}
h1,h2{margin:10px 0 16px;line-height:1.14}
.hero h1{font-size:clamp(36px,5.6vw,64px)}
.hero h1 span{color:var(--blue)}
p,.lead{color:var(--mute)}
.actions,.micro{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.micro span{padding:6px 12px;background:#fff;border-radius:999px;font-size:12px;box-shadow:0 4px 14px rgba(80,120,160,.1)}
.frame{position:relative}
.frame img,.shot img,.visual img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:16px}
.tag{
  position:absolute;padding:10px 12px;font-size:12px;background:#fff;border-radius:12px;
  box-shadow:0 10px 24px rgba(80,120,160,.16);
}
.a{left:-8px;bottom:18px;animation:bob 7s ease-in-out infinite}
.b{right:-8px;top:18px;animation:bob 5s ease-in-out infinite reverse}
.section{padding:80px 0}
.head{max-width:720px;margin-bottom:30px}
.head h2,h2{font-size:clamp(28px,4.2vw,44px)}
.grid6,.review-grid,.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.card,.review,.download-card,.article,.scene{padding:22px;background:#fff;border-radius:16px;box-shadow:0 12px 32px rgba(80,120,160,.1)}
.icon{color:var(--blue);font-size:22px}
.card h3{margin:12px 0 8px}
.split,.visual,.faq-layout{grid-template-columns:1fr 1fr;gap:44px}
.scene-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin:18px 0 24px}
.scene b{display:block;color:var(--blue);font-size:12px}
.visual{gap:0}
.visual-copy{padding:48px 36px;background:#fff;border-radius:0 16px 16px 0}
.metrics{display:flex;gap:26px;margin:20px 0 26px}
.metrics b{display:block;color:var(--blue);font-size:28px}
.person{display:flex;gap:10px;align-items:center;margin-top:14px}
.avatar{width:36px;height:36px;display:grid;place-items:center;background:#eaf5ff;color:var(--blue);font-weight:800;border-radius:50%}
.person small{display:block;color:var(--mute)}
.faq-layout{grid-template-columns:.8fr 1.2fr}
details{border-bottom:1px solid #e4eef6}
summary{padding:16px 6px;font-weight:800;cursor:pointer;list-style:none}
.cta{padding:20px 0 70px}
.cta-in{grid-template-columns:1fr auto;padding:28px;background:#fff;border-radius:20px;box-shadow:0 18px 40px rgba(80,120,160,.12)}
.page-head{padding:78px 0 24px}
.help-layout{grid-template-columns:220px 1fr;align-items:start}
.side{padding:14px}
.side a{display:block;padding:8px 6px}
.policy{margin-top:16px;padding:16px;background:#f5fbff;border-radius:12px}
.shot{margin:20px 0}
footer{padding:46px 0 16px;background:rgba(255,255,255,.55)}
.footer{grid-template-columns:1.4fr repeat(3,1fr);align-items:start}
.footer a{display:block;margin:8px 0;color:#4d6a80}
.copy{margin-top:24px;padding-top:12px;border-top:1px solid var(--line);color:#6b8296}
@media(max-width:860px){
  .links{display:none}
  .hero-grid,.split,.visual,.faq-layout,.help-layout,.cta-in,.footer{grid-template-columns:1fr}
  .grid6,.review-grid,.cards,.scene-grid{grid-template-columns:1fr 1fr}
  .visual-copy{padding:28px;border-radius:0 0 16px 16px}
}
@media(max-width:560px){
  .grid6,.review-grid,.cards,.scene-grid,.footer{grid-template-columns:1fr}
}
@media(prefers-reduced-motion:reduce){.float,.a,.b{animation:none}}