:root{
  --ink:#16323A;
  --lake:#1F8A9A;
  --lake-hi:#2AA4B6;
  --sky:#E7F6F8;
  --foam:#F5FCFD;
  --mint:#8FD0C0;
  --coral:#F07167;
  --line:#C5E0E5;
  --muted:#4F6B72;
  --white:#fff;
  --shadow:0 12px 30px rgba(31,138,154,.12);
  --font-display:"Trebuchet MS","Segoe UI","Microsoft YaHei UI",sans-serif;
  --font-body:"Segoe UI","Microsoft YaHei UI","PingFang SC",sans-serif;
  --font-shop:"Candara","Segoe UI","Microsoft YaHei UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--ink);font-family:var(--font-body);line-height:1.55;
  background:
    radial-gradient(ellipse 80% 50% at 10% -10%,rgba(143,208,192,.35),transparent 55%),
    radial-gradient(ellipse 60% 40% at 100% 0%,rgba(42,164,182,.18),transparent 50%),
    linear-gradient(180deg,var(--foam),var(--sky) 48%,#eef8fa);
}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
a:focus-visible{outline:2px solid var(--lake-hi);outline-offset:2px}
.wrap{width:min(1100px,92%);margin:0 auto}

/* aisle header — retail shelf rail */
.top{
  position:sticky;top:0;z-index:50;
  background:rgba(245,252,253,.92);
  border-bottom:1px solid var(--line);
  backdrop-filter:blur(10px);
}
.top-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;padding:.75rem 0}
.logo{display:flex;align-items:center;gap:.6rem}
.logo i{
  width:2.15rem;height:2.15rem;border-radius:50%;
  display:grid;place-items:center;background:var(--lake);color:#fff;
  font-style:normal;font-family:var(--font-display);font-weight:700;
  box-shadow:0 0 0 4px rgba(31,138,154,.15);
}
.logo b{font-family:var(--font-display);font-size:1.2rem;letter-spacing:.02em}
.logo small{display:block;font-size:.72rem;color:var(--lake);letter-spacing:.06em}
.nav{display:flex;flex-wrap:wrap;gap:.85rem;font-size:.92rem}
.nav a{color:var(--muted)}
.nav a:hover,.nav a.on{color:var(--lake);font-weight:600}

/* signature: store aisle ticket strip */
.aisle{
  display:flex;gap:.5rem;overflow-x:auto;padding:.55rem 0;
  border-bottom:1px dashed var(--line);
}
.ticket{
  flex:0 0 auto;padding:.28rem .7rem;border-radius:999px;
  background:var(--white);border:1px solid var(--line);
  font-size:.75rem;color:var(--lake);font-family:var(--font-shop);
  white-space:nowrap;
}
.ticket strong{color:var(--coral);font-weight:700;margin-right:.25rem}

/* hero — store front download bay */
.hero{padding:2rem 0 1.2rem}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:1.5rem;align-items:center}
.eyebrow{
  display:inline-block;margin-bottom:.55rem;padding:.2rem .55rem;
  border-radius:4px;background:rgba(31,138,154,.1);color:var(--lake);
  font-size:.78rem;font-family:var(--font-shop);letter-spacing:.04em;
}
.hero h1{
  margin:0 0 .55rem;font-family:var(--font-display);
  font-size:clamp(1.85rem,4vw,2.7rem);line-height:1.15;letter-spacing:.01em;
}
.hero-lead{margin:0 0 1rem;color:var(--muted);max-width:34rem}
.cta-row{display:flex;flex-wrap:wrap;gap:.65rem;margin-bottom:.9rem}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:9.2rem;padding:.7rem 1.1rem;border-radius:999px;
  border:1px solid transparent;font-family:var(--font-shop);font-size:.95rem;
  white-space:nowrap;word-break:keep-all;writing-mode:horizontal-tb;
  transition:transform .15s ease,background .15s ease,box-shadow .15s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-pri{background:var(--lake);color:#fff;box-shadow:var(--shadow)}
.btn-pri:hover{background:var(--lake-hi)}
.btn-sec{background:var(--white);border-color:var(--line);color:var(--ink)}
.btn-sec:hover{border-color:var(--lake);color:var(--lake)}
.btn-light{background:rgba(255,255,255,.2);border-color:rgba(255,255,255,.45);color:#fff}
.req{
  display:grid;grid-template-columns:1fr 1fr;gap:.5rem;
  padding:.75rem;border-radius:12px;background:rgba(255,255,255,.7);
  border:1px solid var(--line);font-size:.84rem;color:var(--muted);
}
.req b{display:block;color:var(--lake);font-size:.75rem;margin-bottom:.15rem;font-family:var(--font-shop)}
.hero-media{
  align-self:center;margin:0;padding:0;border-radius:18px;
  background:var(--white);border:1px solid var(--line);box-shadow:var(--shadow);
  overflow:hidden;position:relative;
}
.hero-media::before{
  content:"门店看板";position:absolute;left:.8rem;top:.8rem;z-index:1;
  padding:.2rem .5rem;border-radius:6px;background:rgba(255,255,255,.92);
  font-size:.72rem;color:var(--lake);font-family:var(--font-shop);
  border:1px solid var(--line);
}
.hero-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}

/* sections */
section{padding:2.2rem 0}
.sec-h{margin-bottom:1.1rem}
.sec-h h2{margin:0 0 .3rem;font-family:var(--font-display);font-size:clamp(1.3rem,2.5vw,1.75rem)}
.sec-h p{margin:0;color:var(--muted);max-width:40rem}
.chip{font-size:.75rem;color:var(--coral);font-family:var(--font-shop);letter-spacing:.06em;margin-bottom:.25rem}

/* download shelf — 4 product cards */
#download{background:linear-gradient(180deg,transparent,rgba(31,138,154,.05))}
.shelf{
  display:grid;grid-template-columns:repeat(4,1fr);gap:.85rem;
}
.sku{
  background:var(--white);border:1px solid var(--line);border-radius:16px;
  padding:1rem .9rem;display:flex;flex-direction:column;gap:.55rem;
  box-shadow:0 8px 20px rgba(22,50,58,.05);
  position:relative;
}
.sku::after{
  content:"";position:absolute;left:12%;right:12%;bottom:-6px;height:6px;
  border-radius:0 0 10px 10px;background:rgba(31,138,154,.08);z-index:-1;
}
.sku .tag{
  align-self:flex-start;padding:.15rem .45rem;border-radius:4px;
  background:var(--sky);color:var(--lake);font-size:.7rem;font-family:var(--font-shop);
}
.sku h3{margin:0;font-family:var(--font-display);font-size:1.15rem}
.sku img{
  width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;border-radius:10px;border:1px solid var(--line);background:var(--foam);
}
.sku ul{margin:0;padding:0;list-style:none;font-size:.85rem;color:var(--muted)}
.sku li{display:flex;justify-content:space-between;gap:.4rem;padding:.22rem 0;border-bottom:1px dotted var(--line)}
.sku .btn{width:100%;margin-top:auto;border-radius:10px}

/* feature matrix as store counters */
.feats{display:grid;grid-template-columns:repeat(5,1fr);gap:.7rem}
.feat{
  background:var(--white);border:1px solid var(--line);border-radius:14px;padding:.95rem .8rem;
}
.feat .ico{
  width:2.2rem;height:2.2rem;border-radius:10px;margin-bottom:.55rem;
  display:grid;place-items:center;background:linear-gradient(145deg,var(--sky),#fff);
  border:1px solid var(--line);color:var(--lake);font-family:var(--font-shop);font-weight:700;font-size:.78rem;
}
.feat h3{margin:0 0 .3rem;font-size:.98rem;font-family:var(--font-display)}
.feat p{margin:0;font-size:.84rem;color:var(--muted)}

/* solution */
.solution{display:grid;grid-template-columns:1fr 1fr;gap:1.2rem;align-items:center}
.sol-copy{
  background:var(--white);border:1px solid var(--line);border-radius:18px;
  padding:1.25rem 1.15rem;box-shadow:var(--shadow);
}
.sol-copy h2{margin:0 0 .5rem;font-family:var(--font-display);font-size:1.5rem}
.sol-copy p{margin:0 0 .7rem;color:var(--muted)}
.sol-media{display:grid;gap:.65rem}
.sol-media figure{margin:0;padding:0;border-radius:14px;overflow:hidden;border:1px solid var(--line);background:#fff}
.sol-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}
.pair{display:grid;grid-template-columns:1fr 1fr;gap:.65rem}

/* trust */
.trust{
  text-align:center;padding:1.5rem 1.1rem;border-radius:20px;
  background:linear-gradient(135deg,var(--lake),#157987);color:#eefcff;
}
.trust .big{font-family:var(--font-display);font-size:clamp(1.7rem,3.5vw,2.4rem);margin-bottom:.35rem}
.trust .big span{color:#FFD6A5}
.trust p{margin:.2rem auto 1rem;max-width:34rem;opacity:.93}
.brands{display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem}
.brands span{
  padding:.4rem .75rem;border-radius:999px;border:1px solid rgba(255,255,255,.35);
  background:rgba(255,255,255,.1);font-family:var(--font-shop);font-size:.9rem;
}

/* news + help */
.split{display:grid;grid-template-columns:1.1fr .9fr;gap:1rem}
.panel{
  background:var(--white);border:1px solid var(--line);border-radius:16px;
  padding:1.1rem 1rem;box-shadow:0 6px 18px rgba(22,50,58,.04);
}
.panel h2{margin:0 0 .75rem;font-family:var(--font-display);font-size:1.25rem}
.news{list-style:none;margin:0;padding:0}
.news li{padding:.6rem 0;border-bottom:1px solid var(--line)}
.news li:last-child{border-bottom:0}
.news time{display:block;font-size:.72rem;color:var(--lake);margin-bottom:.15rem;font-family:var(--font-shop)}
.news a:hover{color:var(--lake)}
.faq details{border:1px solid var(--line);border-radius:10px;padding:.55rem .7rem;margin-bottom:.45rem;background:var(--foam)}
.faq summary{cursor:pointer;font-weight:600}
.faq p{margin:.4rem 0 0;font-size:.9rem;color:var(--muted)}

/* bottom CTA */
.cta-band{
  margin-bottom:1.8rem;border-radius:20px;overflow:hidden;color:#fff;
  background:linear-gradient(120deg,rgba(22,50,58,.82),rgba(31,138,154,.78)),url("5.png") center/cover no-repeat;
}
.cta-band .inner{padding:1.6rem 1.25rem}
.cta-band h2{margin:0 0 .4rem;font-family:var(--font-display);font-size:clamp(1.3rem,3vw,1.85rem)}
.cta-band p{margin:0 0 .9rem;max-width:36rem;opacity:.93}
.gains{display:flex;flex-wrap:wrap;gap:.45rem;margin-bottom:.9rem}
.gains span{padding:.3rem .6rem;border-radius:999px;border:1px solid rgba(255,255,255,.35);font-size:.82rem;background:rgba(0,0,0,.15)}

.foot{border-top:1px solid var(--line);padding:1.1rem 0 1.5rem;font-size:.86rem;color:var(--muted)}
.foot-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:.7rem}
.foot nav{display:flex;gap:.8rem}
.foot a:hover{color:var(--lake)}

.page-hero{padding:1.5rem 0 1rem;border-bottom:1px dashed var(--line)}
.page-hero h1{margin:0 0 .35rem;font-family:var(--font-display);font-size:clamp(1.45rem,3vw,2rem)}
.page-hero p{margin:0;color:var(--muted);max-width:40rem}
.help-grid{display:grid;grid-template-columns:1fr 1fr;gap:.8rem}
.help-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:1rem}
.help-card h3{margin:0 0 .35rem;font-family:var(--font-display)}
.help-card p{margin:0;font-size:.9rem;color:var(--muted)}

@media (max-width:960px){
  .hero-grid,.solution,.split{grid-template-columns:1fr}
  .shelf{grid-template-columns:1fr 1fr}
  .feats{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:640px){
  .nav{display:none}
  .shelf,.feats,.help-grid,.pair,.req{grid-template-columns:1fr}
  .cta-row .btn{flex:1 1 100%}
}
.hero-grid{align-items:center}
.hero-media{align-self:center;height:auto;padding:0;margin:0;overflow:visible}
.hero-media img{
  display:block;width:100%;height:auto;object-fit:contain;object-position:center;
  margin:0;padding:0;min-height:0;max-height:none;clip-path:none;transform:none;
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .btn:hover{transform:none}
}