[hidden]{display:none!important}
:root{
  --primary:#ff4e60;
  --accent:#36d6a6;
  --dark:#15151a;
  --paper:#fff;
  --muted:rgba(255,255,255,.76);
  --line:rgba(255,255,255,.18);
}
*{box-sizing:border-box}
html,body{margin:0;min-height:100%;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;background:var(--dark);color:#fff;letter-spacing:0}
body{overflow-x:hidden}
button{font:inherit}
.shell{min-height:100vh;background:#101015}
.hero{position:relative;min-height:calc(100vh - 58px);overflow:hidden;display:flex;flex-direction:column;justify-content:space-between;padding:18px 16px 172px}
.hero-bg{position:fixed;inset:-20px 0;background-image:url("/assets/images/changtu.jpg");background-size:cover;background-position:center top;transform:translateZ(0);animation:bgDrift 34s linear infinite;z-index:0}
.shade{position:fixed;inset:0;background:linear-gradient(180deg,rgba(8,8,10,.18),rgba(8,8,10,.42) 42%,rgba(8,8,10,.9));z-index:1;pointer-events:none}
.topbar,.announce,.hero-copy,.proof,.gallery-strip,.download-dock{position:relative;z-index:2}
.topbar{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;max-width:460px;margin:0 auto}
.brand{display:flex;align-items:center;gap:8px;font-weight:900;font-size:17px;text-shadow:0 2px 8px rgba(0,0,0,.45)}
.brand-mark{width:13px;height:13px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px rgba(54,214,166,.15)}
.badge{font-size:12px;color:#101015;background:rgba(255,255,255,.9);padding:7px 10px;border-radius:999px;font-weight:800;white-space:nowrap}
.announce{width:100%;max-width:460px;margin:16px auto 0;padding:10px 12px;border:1px solid var(--line);background:rgba(10,10,14,.42);backdrop-filter:blur(12px);font-size:13px;color:#fff;border-radius:8px}
.hero-copy{width:100%;max-width:460px;margin:54px auto 0}
h1{margin:0;color:var(--primary);font-style:italic;font-size:48px;line-height:.98;font-weight:950;text-align:center;text-shadow:0 5px 18px rgba(0,0,0,.68)}
.identity-row{display:grid;grid-template-columns:66px minmax(0,1fr);align-items:center;gap:14px;margin:18px auto 0;max-width:410px}
.identity-row img{width:66px;height:66px;border-radius:10px;object-fit:cover;box-shadow:0 12px 32px rgba(0,0,0,.42)}
.identity-row p{margin:0;font-size:18px;line-height:1.35;font-weight:850;text-shadow:0 3px 14px rgba(0,0,0,.72)}
.proof{width:100%;max-width:460px;margin:24px auto 0;display:flex;align-items:flex-end;justify-content:space-between;gap:18px;color:var(--muted)}
.proof strong{display:block;color:#fff;font-size:25px;line-height:1;font-weight:950}
.proof span{font-size:12px;text-transform:uppercase}
.proof p{max-width:210px;margin:0;font-size:12px;line-height:1.35;text-align:right}
.gallery-strip{position:fixed;left:0;right:0;bottom:150px;z-index:3;display:flex;gap:7px;overflow:hidden;padding:0 0 0 8px}
.gallery-track{display:flex;gap:7px;animation:galleryScroll 28s linear infinite}
.gallery-strip img{width:105px;height:155px;object-fit:cover;border-radius:8px;box-shadow:0 12px 30px rgba(0,0,0,.55)}
.download-dock{position:fixed;left:50%;bottom:18px;transform:translateX(-50%);width:min(420px,calc(100vw - 24px));display:flex;flex-direction:column;align-items:center;gap:10px;z-index:5}
.image-download{position:relative;width:100%;height:74px;border:0;border-radius:999px;overflow:hidden;cursor:pointer;color:#fff;background:linear-gradient(145deg,#ff6577,#ed2644);box-shadow:0 12px 36px rgba(255,78,96,.55),0 0 44px rgba(255,78,96,.38);display:flex;align-items:center;justify-content:center;transition:transform .2s ease,box-shadow .2s ease;animation:pulse 2.4s ease-in-out infinite}
.image-download img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.image-download span{position:relative;font-weight:950;font-size:24px;text-shadow:0 3px 10px rgba(0,0,0,.4)}
.image-download:hover{transform:translateY(-2px);box-shadow:0 16px 44px rgba(255,78,96,.7),0 0 58px rgba(255,78,96,.46)}
.dock-actions{display:flex;gap:8px;width:100%}
.line-button{flex:1;min-height:40px;border:1px solid rgba(255,255,255,.28);border-radius:8px;background:rgba(10,10,14,.62);color:#fff;font-weight:850;cursor:pointer;backdrop-filter:blur(12px)}
.line-button:hover{background:rgba(255,255,255,.16)}
.content-band{position:relative;z-index:4;background:#f6f7fb;color:#15151a;padding:34px 16px 42px}
.features,.faq{width:100%;max-width:980px;margin:0 auto;display:grid;gap:12px}
.features{grid-template-columns:repeat(3,minmax(0,1fr));margin-bottom:24px}
.feature,.faq-item{border:1px solid #e5e7ef;border-radius:8px;background:#fff;padding:16px;box-shadow:0 10px 24px rgba(25,25,30,.06)}
.feature strong,.faq-item strong{display:block;font-size:16px;margin-bottom:7px}
.feature p,.faq-item p{margin:0;color:#565b66;font-size:14px;line-height:1.5}
.faq{grid-template-columns:repeat(2,minmax(0,1fr))}
.guide,.access-block{position:fixed;inset:0;z-index:20;background:rgba(0,0,0,.68);display:flex;align-items:flex-start;justify-content:center;padding:72px 18px}
.guide-panel,.access-panel{width:min(430px,100%);border-radius:8px;background:#fff;color:#17171c;padding:22px;box-shadow:0 20px 60px rgba(0,0,0,.35)}
.guide-panel{position:relative}
.guide-panel button{position:absolute;right:10px;top:8px;width:32px;height:32px;border:0;background:#f1f2f6;border-radius:50%;cursor:pointer}
.guide-panel strong,.access-panel strong{display:block;font-size:20px;margin-bottom:8px}
.guide-panel p,.access-panel span{margin:0;color:#555b66;line-height:1.55}
@keyframes bgDrift{0%{transform:translateY(0)}100%{transform:translateY(-30%)}}
@keyframes galleryScroll{0%{transform:translateX(0)}100%{transform:translateX(-50%)}}
@keyframes pulse{0%,100%{filter:brightness(1)}50%{filter:brightness(1.1)}}
@media (min-width:768px){
  body{background:#0b0b0f}
  .hero{max-width:430px;margin:0 auto;box-shadow:0 0 0 1px rgba(255,255,255,.08)}
  .hero-bg,.shade{left:50%;right:auto;width:430px;transform:translateX(-50%)}
  .gallery-strip{left:50%;right:auto;width:430px;transform:translateX(-50%);bottom:150px}
  h1{font-size:56px}
  .download-dock{width:390px}
}
@media (max-width:720px){
  .features,.faq{grid-template-columns:1fr}
  .content-band{padding-bottom:36px}
}
@media (max-width:370px){
  h1{font-size:42px}
  .identity-row{grid-template-columns:58px minmax(0,1fr)}
  .identity-row img{width:58px;height:58px}
  .identity-row p{font-size:16px}
  .image-download span{font-size:21px}
}