:root{
  --bg:#f3f6fb;
  --card:#ffffff;
  --text:#1b1f2a;
  --muted:#6b7280;
  --line:#e6eaf2;
  --accent:#2aa3ff;
  --shadow:0 10px 30px rgba(17,24,39,.08);
  --radius:26px;
  --max:1200px;
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  font-family: system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,"Noto Sans","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.6;
}

a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:var(--max);margin:0 auto;padding:0 22px}

.shell{
  margin:14px auto 28px;
  max-width: calc(var(--max) + 44px);
  background:transparent;
}

/* top card */
.topcard{
  background:var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow:hidden;
}

/* header */
.header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:18px 22px;
  gap:12px;
}

.brand{
  display:flex;
  align-items:center;
  gap:12px;
  min-width:180px;
}
.brand img{height:46px;width:auto;border-radius:10px}
.brand .name{font-weight:700;letter-spacing:.5px}

.nav{
  display:flex;
  align-items:center;
  gap:26px;
  font-weight:600;
}
.nav a{padding:10px 6px;border-radius:12px;color:#354155}
.nav a.active{color:var(--accent)}
.nav a:hover{background:#f0f6ff}

.burger{
  display:none;
  width:44px;height:44px;
  border:1px solid var(--line);
  border-radius:14px;
  background:#fff;
  align-items:center;justify-content:center;
  cursor:pointer;
}
.burger span{
  width:18px;height:2px;background:#111827;display:block;position:relative;
}
.burger span:before,.burger span:after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:#111827;
}
.burger span:before{top:-6px}
.burger span:after{top:6px}

/* mobile drawer */
.drawer{
  position:fixed;inset:0;
  background:rgba(15,23,42,.45);
  display:none;
  align-items:flex-start;
  justify-content:center;
  padding:18px;
  z-index:999;
}
.drawer .panel{
  width:min(560px, 100%);
  background:#fff;
  border-radius:22px;
  box-shadow: var(--shadow);
  padding:14px 14px 18px;
}
.drawer .panelhead{
  display:flex;justify-content:space-between;align-items:center;
  padding:6px 8px 10px;
}
.drawer .close{
  width:42px;height:42px;border-radius:14px;border:1px solid var(--line);
  background:#fff;cursor:pointer;
}
.drawer nav{display:flex;flex-direction:column;gap:8px;padding:6px}
.drawer nav a{padding:12px 12px;border-radius:14px;font-weight:700}
.drawer nav a.active{background:#eaf4ff;color:var(--accent)}

/* hero */
.hero{
  position:relative;
  min-height: 320px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  background:
    linear-gradient(180deg, rgba(255,255,255,.08), rgba(255,255,255,.02)),
    url('img/hero.jpg') center/cover no-repeat;
}
.hero .inner{
  padding:66px 18px 72px;
}
.hero .title{
  font-size: clamp(38px, 5vw, 72px);
  font-weight:800;
  letter-spacing: 4px;
  color:#ffffff;
  text-shadow: 0 10px 30px rgba(0,0,0,.22);
}
.hero .subtitle{
  margin-top:10px;
  font-size: clamp(14px, 1.6vw, 18px);
  color:rgba(0,0,0,.78);
  font-weight:700;
  background: rgba(255,255,255,.62);
  display:inline-block;
  padding:10px 14px;
  border-radius: 999px;
}
.hero .cta{
  margin-top:18px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding:12px 18px;
  border-radius: 999px;
  background:#ffffff;
  color:#111827;
  font-weight:800;
  border:1px solid rgba(255,255,255,.6);
  box-shadow: 0 14px 30px rgba(0,0,0,.12);
}
.hero .cta:hover{transform:translateY(-1px)}

/* content blocks */
.section{
  padding: 26px 22px 6px;
  background:#fff;
  border-top:1px solid var(--line);
}
.section:first-of-type{border-top:0}
.h1{
  margin:0;
  text-align:center;
  font-size: clamp(22px, 2.8vw, 34px);
  font-weight:900;
  color:#243044;
}
.muted-center{
  text-align:center;
  color:var(--muted);
  margin:10px 0 0;
}

.grid3{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap:28px;
  padding: 28px 0 6px;
}
.tile{
  border-radius: 18px;
  overflow:hidden;
  border:1px solid var(--line);
  background:#fff;
}
.tile img{aspect-ratio:1/1;object-fit:cover;width:100%}

.grid2{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap:28px;
  padding: 18px 0 6px;
}
.pbox{
  padding: 0 4px 10px;
  color:#374151;
  font-size: 14px;
}
.pbox p{margin:0}
.card{
  border:1px solid var(--line);
  border-radius: 18px;
  overflow:hidden;
  background:#fff;
}
.card .pad{padding:18px 18px 16px}
.card h2{margin:0 0 10px;font-size:22px}
.card ul{margin:10px 0 0;padding-left:18px}
.card li{margin:6px 0}
.card .price{font-weight:900;font-size:16px;text-align:center}

.center{text-align:center}

.footer{
  text-align:center;
  padding: 16px 16px 22px;
  color: #8b95a7;
  font-size: 13px;
}

/* back to top */
.toTop{
  position:fixed;
  right:18px;
  bottom:18px;
  width:48px;height:48px;
  border-radius: 16px;
  border:1px solid var(--line);
  background:#fff;
  box-shadow: var(--shadow);
  cursor:pointer;
  display:none;
  align-items:center;justify-content:center;
  z-index: 1000;
}
.toTop:hover{transform:translateY(-1px)}
.toTop svg{width:20px;height:20px}

@media (max-width: 920px){
  .grid3{grid-template-columns: 1fr; gap:16px}
  .grid2{grid-template-columns: 1fr; gap:16px}
  .nav{display:none}
  .burger{display:flex}
  .brand{min-width:0}
  .hero .subtitle{border-radius:16px}
}