:root{
  --ink:#173135;
  --muted:#657a7d;
  --paper:#f6fbfa;
  --mint:#8ce3d5;
  --teal:#168a86;
  --teal2:#0d5c5a;
  --coral:#ff7a67;
  --cream:#fff7ee;
  --dark:#102c30;
  --dark2:#163b3f;
  --line:#d6e7e4;
  --white:#fff;
  --container:1180px;
}
*,
*::before,
*::after{
  box-sizing:border-box;
  min-width:0;
}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{
  margin:0;
  font-family:Arial,"Microsoft YaHei","PingFang SC",sans-serif;
  color:var(--ink);
  background:var(--paper);
  line-height:1.82;
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
figure{margin:0}
p,h1,h2,h3,li,small,span,b{overflow-wrap:anywhere}
.shell{width:min(calc(100% - 44px),var(--container));margin:0 auto}
.header{position:sticky;top:0;z-index:60;background:rgba(246,251,250,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(15px)}
.header-grid{min-height:72px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:24px;align-items:center}
.brand{display:flex;align-items:center;gap:12px;min-width:0}
.brand img,.footer-grid img{width:145px;height:auto;max-width:100%;object-fit:contain}
.header nav{display:flex;justify-content:center;gap:22px;flex-wrap:wrap;min-width:0;font-size:13px;font-weight:800}
.header-cta{display:inline-flex;align-items:center;justify-content:center;min-height:42px;padding:0 18px;border-radius:999px;background:var(--coral);color:#fff;font-size:13px;font-weight:900}
.hero{padding:50px 0 68px;background:linear-gradient(90deg,#eaf7f6 0 49%,#fdf5eb 49% 100%)}
.hero-grid{display:grid;grid-template-columns:minmax(0,.8fr) minmax(0,1.2fr);gap:56px;align-items:center}
.hero-copy h1{margin:0 0 22px;font-size:clamp(48px,5.5vw,76px);line-height:1;letter-spacing:-.06em}
.eyebrow,.section-label{margin:0 0 12px;color:var(--teal);font-size:10px;font-weight:900;letter-spacing:.15em}
.hero-cta{max-width:560px;min-height:80px;padding:12px 14px;display:grid;grid-template-columns:54px 1fr;gap:14px;align-items:center;border-radius:40px;background:var(--dark);color:#fff}
.cta-arrow{width:54px;height:54px;display:grid;place-items:center;border-radius:50%;background:var(--coral);font-size:20px}
.hero-tags{display:flex;gap:7px;flex-wrap:wrap;margin-top:18px}
.hero-tags span{padding:6px 10px;border:1px solid #c8deda;border-radius:999px;background:#fff;color:#5f7475;font-size:10px;font-weight:800}
.hero-showcase{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;align-items:stretch;min-width:0}
.hero-showcase img{width:100%;border-radius:22px;object-fit:cover}
.hero-showcase img:first-child{grid-column:1/-1;height:220px}
.hero-showcase img:last-child{height:220px}
.download-band{padding:50px 0 56px;background:var(--dark);color:#edf7f5}
.download-band-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(0,1.1fr);gap:36px;align-items:start}
.download-band-title h2,.device-grid h2,.faq-grid h2{margin:4px 0 14px;font-size:clamp(30px,4vw,44px);line-height:1.14;letter-spacing:-.04em}
.journey{display:grid;gap:14px}
.journey-step{display:grid;grid-template-columns:44px minmax(0,1fr) minmax(0,120px);gap:16px;align-items:center;padding:18px;border-radius:20px;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.08)}
.journey-number{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;background:var(--coral);color:#fff;font-weight:900}
.journey-copy span,.device-grid span,.faq-grid > div > span{color:#86aaa5;font-size:10px;font-weight:900;letter-spacing:.15em}
.journey-copy h3{margin:4px 0 8px;font-size:20px}
.journey-copy p{margin:0;color:#9eb5b2;font-size:13px}
.journey-image,.journey-icon{min-width:0;display:grid;place-items:center}
.journey-image img{width:100%;max-height:120px;object-fit:cover;border-radius:14px}
.journey-icon img{width:54px;height:auto}
.device-note{padding:58px 0;background:#fff}
.device-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.device-grid > div{padding:22px;border:1px solid var(--line);border-radius:20px;background:var(--paper)}
.faq{padding:58px 0 74px;background:#f7faf5}
.faq-grid{display:grid;grid-template-columns:minmax(0,.7fr) minmax(0,1.3fr);gap:36px}
.faq-list{display:grid;gap:12px}
.faq-list details{padding:0 20px;border:1px solid var(--line);border-radius:20px;background:#fff}
.faq-list summary{list-style:none;cursor:pointer;padding:18px 0;font-weight:900;font-size:18px}
.faq-list summary::-webkit-details-marker{display:none}
.faq-list p{margin:0 0 18px;color:var(--muted)}
.site-footer{background:var(--dark);color:#d3e3f3;padding:34px 0 40px}
.footer-grid{display:grid;grid-template-columns:1fr auto;gap:18px;align-items:center}
.footer-grid h3{margin:0 0 8px;color:#fff}
.footer-grid nav{display:flex;gap:18px;flex-wrap:wrap;justify-content:flex-end}
.mobile-download-bar{display:none}
@media (max-width:980px){
  .header-grid,
  .hero-grid,
  .download-band-grid,
  .faq-grid,
  .footer-grid{grid-template-columns:1fr}
  .header nav{display:none}
  .hero-showcase{grid-template-columns:1fr}
  .hero-showcase img:first-child{grid-column:auto;height:200px}
  .hero-showcase img:last-child{height:200px}
  .device-grid{grid-template-columns:1fr}
}
@media (max-width:640px){
  :root{--container:min(100% - 28px,1180px)}
  .shell{width:var(--container)}
  .header-grid{min-height:62px}
  .brand img{height:28px}
  .header-cta{font-size:12px;padding:0 12px}
  .hero{padding:56px 0 28px}
  .hero-copy h1,.download-band h2,.device-note h2,.faq h2{font-size:clamp(34px,12vw,48px)}
  .lead{font-size:16px}
  .hero-actions{flex-direction:column}
  .hero-actions a{width:100%;justify-content:center}
  .hero-showcase,.device-grid{grid-template-columns:1fr}
  .download-band,.device-note,.faq{padding:48px 0}
  .journey-step{grid-template-columns:36px minmax(0,1fr)}
  .journey-image,.journey-icon{grid-column:2;justify-self:start;width:100%}
  .journey-image img{max-height:160px}
  .mobile-download-bar{
    position:fixed;
    left:0;
    right:0;
    bottom:0;
    z-index:80;
    display:flex;
    align-items:center;
    justify-content:space-between;
    gap:12px;
    padding:9px 12px calc(9px + env(safe-area-inset-bottom));
    background:rgba(16,44,48,.98);
    color:#fff;
  }
  .mobile-download-bar small{
    display:block;
    font-size:9px;
    letter-spacing:.16em;
    color:#8fb9df;
  }
  .mobile-download-bar strong{
    display:block;
    font-size:13px;
  }
  .mobile-download-bar a{
    display:inline-flex;
    align-items:center;
    justify-content:center;
    min-height:42px;
    padding:0 16px;
    border-radius:999px;
    background:var(--coral);
    color:#fff;
    font-weight:900;
  }
}