:root{
  --bg: #F5F7FA;
  --panel: #FFFFFF;
  --text: #111827;
  --muted: #6B7280;
  --line: #E5E7EB;
  --primary: #1E88E5;
  --primary-2: #0D47A1;
  --accent: #FF9800;
  --shadow: 0 12px 30px rgba(17,24,39,.10);
  --radius: 16px;
  --radius-sm: 12px;
  --max: 1100px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
  color:var(--text);
  background:
    radial-gradient(900px 600px at 15% 0%, rgba(30,136,229,.14), transparent 60%),
    radial-gradient(800px 560px at 85% 10%, rgba(255,152,0,.14), transparent 55%),
    var(--bg);
  line-height:1.6;
}

a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto}

.container{max-width:var(--max); margin:0 auto; padding:0 20px}
.skip-link{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{
  left:20px; top:12px; width:auto; height:auto;
  background:#fff; border:1px solid var(--line); border-radius:999px; padding:10px 14px;
  box-shadow:var(--shadow); z-index:9999;
}

header{
  position:sticky; top:0; z-index:50;
  backdrop-filter:saturate(160%) blur(10px);
  background:rgba(245,247,250,.7);
  border-bottom:1px solid rgba(229,231,235,.7);
}

.nav{
  display:flex; align-items:center; justify-content:space-between;
  height:70px;
}
.brand{display:flex; gap:10px; align-items:center}
.brand img{width:34px; height:34px}
.brand .name{font-weight:800; letter-spacing:.2px}
.brand .sub{font-size:12px; color:var(--muted)}

.links{display:flex; gap:18px; align-items:center}
.links a{
  font-size:14px; color:rgba(17,24,39,.78);
  padding:8px 10px; border-radius:999px;
}
.links a[aria-current="page"], .links a:hover{
  background:rgba(30,136,229,.10);
  color:var(--primary-2);
}

.nav-cta{display:flex; gap:10px; align-items:center}
.btn{
  display:inline-flex; align-items:center; justify-content:center;
  height:40px; padding:0 14px; border-radius:999px;
  border:1px solid var(--line);
  font-weight:700; font-size:14px;
  background:rgba(255,255,255,.75);
  cursor:pointer;
}
.btn:focus{outline:3px solid rgba(30,136,229,.25); outline-offset:2px}
.btn-primary{
  border-color:transparent;
  color:#fff;
  background:linear-gradient(135deg, var(--primary), var(--primary-2));
  box-shadow:0 10px 24px rgba(30,136,229,.28);
}
.btn-primary:hover{filter:brightness(1.02)}
.btn-accent{
  border-color:transparent;
  color:#1f2937;
  background:linear-gradient(135deg, #FFD38A, var(--accent));
}

.menu-btn{display:none}
.menu{display:none}

main{padding:40px 0 64px}
.hero{
  display:grid; grid-template-columns: 1.15fr .85fr;
  gap:26px; align-items:center;
  padding:18px 0 18px;
}
.hero h1{
  font-size:44px; line-height:1.15; margin:0 0 10px;
  letter-spacing:-.6px;
}
.hero p{margin:0; color:rgba(17,24,39,.78); font-size:16px}
.hero .actions{display:flex; gap:12px; margin-top:18px; flex-wrap:wrap}
.hero .note{margin-top:10px; color:var(--muted); font-size:13px}
.card{
  background:rgba(255,255,255,.85);
  border:1px solid rgba(229,231,235,.9);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.hero .preview{padding:14px}
.hero .preview img{
  border-radius:14px;
  border:1px solid rgba(229,231,235,.9);
  background:#fff;
}

.grid3{display:grid; grid-template-columns:repeat(3,1fr); gap:14px}
.grid2{display:grid; grid-template-columns:repeat(2,1fr); gap:14px}
.section{margin-top:34px}
.section h2{margin:0 0 12px; font-size:26px; letter-spacing:-.2px}
.section .lead{color:var(--muted); margin:0 0 14px}

.feature{
  padding:18px;
}
.feature .icon{
  width:44px; height:44px; border-radius:14px;
  display:grid; place-items:center;
  background:rgba(30,136,229,.12);
  border:1px solid rgba(30,136,229,.18);
  color:var(--primary-2);
  margin-bottom:10px;
}
.feature h3{margin:0 0 8px; font-size:18px}
.feature p{margin:10px 0 0; color:rgba(17,24,39,.78); font-size:14px}

.strip{
  padding:18px;
  display:flex; align-items:center; justify-content:space-between;
  gap:16px;
}
.strip strong{font-size:16px}
.strip span{color:var(--muted); font-size:14px}

.pricing-toggle{
  display:flex; gap:10px; align-items:center; justify-content:flex-end;
  margin-top:-34px;
}
.pill{
  display:inline-flex; gap:6px; align-items:center;
  padding:6px; border-radius:999px;
  border:1px solid var(--line); background:rgba(255,255,255,.7);
}
.pill button{
  border:0; background:transparent; cursor:pointer;
  padding:7px 10px; border-radius:999px; font-weight:800; font-size:13px;
  color:rgba(17,24,39,.70);
}
.pill button[aria-pressed="true"]{
  background:rgba(30,136,229,.12);
  color:var(--primary-2);
}
.badge{
  display:inline-flex; align-items:center;
  padding:4px 10px; border-radius:999px;
  font-size:12px; font-weight:800;
  background:rgba(255,152,0,.18);
  border:1px solid rgba(255,152,0,.30);
  color:#7a3e00;
}

.price-card{padding:18px}
.price-top{display:flex; justify-content:space-between; gap:10px; align-items:flex-start}
.price-card h3{margin:0}
.price{margin:10px 0 8px; font-size:34px; font-weight:900; letter-spacing:-.4px}
.price small{font-size:13px; color:var(--muted); font-weight:700}
.list{margin:10px 0 0; padding:0; list-style:none}
.list li{display:flex; gap:10px; margin:9px 0; color:rgba(17,24,39,.78); font-size:14px}
.tick{
  width:20px; height:20px; border-radius:999px; flex:0 0 auto;
  background:rgba(30,136,229,.12); border:1px solid rgba(30,136,229,.20);
  display:grid; place-items:center; color:var(--primary-2); font-weight:900;
}
.price-actions{display:flex; gap:10px; margin-top:14px; flex-wrap:wrap}

.table{
  overflow:auto; border-radius:var(--radius); border:1px solid rgba(229,231,235,.9);
  background:rgba(255,255,255,.85);
}
table{width:100%; border-collapse:collapse; font-size:14px}
th,td{padding:12px 14px; border-bottom:1px solid rgba(229,231,235,.9); text-align:left; vertical-align:top}
th{background:rgba(245,247,250,.9); font-size:13px; text-transform:none}
tr:last-child td{border-bottom:0}

details{
  border:1px solid rgba(229,231,235,.9);
  background:rgba(255,255,255,.85);
  border-radius:var(--radius-sm);
  padding:12px 14px;
}
details + details{margin-top:10px}
summary{cursor:pointer; font-weight:900}
summary::marker{color:var(--primary)}
details p{margin:10px 0 0; color:rgba(17,24,39,.78); font-size:14px}

footer{
  padding:26px 0 36px;
  border-top:1px solid rgba(229,231,235,.9);
  background:rgba(245,247,250,.7);
}
.foot{
  display:flex; justify-content:space-between; gap:16px; flex-wrap:wrap;
  color:var(--muted); font-size:13px;
}
.foot a{color:var(--muted); text-decoration:underline; text-decoration-style:dotted}

@media (max-width: 920px){
  .hero{grid-template-columns:1fr; }
  .pricing-toggle{justify-content:flex-start; margin-top:10px}
}
@media (max-width: 820px){
  .links{display:none}
  .menu-btn{display:inline-flex}
  .menu{display:none; padding:10px 0 16px}
  .menu a{display:block; padding:10px 12px; border-radius:12px}
  .menu a:hover{background:rgba(30,136,229,.10)}
  .menu[data-open="true"]{display:block}
  .grid3{grid-template-columns:1fr}
  .grid2{grid-template-columns:1fr}
  .hero h1{font-size:38px}
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
}