/* Webstore shared layout + bilingual rules */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
:root{
  --bg:#f7f7f8;
  --bg-2:#ececef;
  --ink:#16161a;
  --muted:#5c5c66;
  --accent:#3d6bfd;
  --accent-2:#6b8cff;
  --paper:#ffffff;
  --line:rgba(22,22,26,.1);
  --max:1080px;
  --serif:"Fraunces","Noto Serif SC",Georgia,serif;
  --sans:"Manrope","Noto Sans SC",system-ui,sans-serif;
}
body{
  font-family:var(--sans);
  color:var(--ink);
  background:var(--bg);
  line-height:1.65;
  overflow-x:hidden;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}

/* i18n — hide inactive language (auto via data-lang on <html>) */
html[data-lang="zh"] [lang="en"]{display:none!important}
html[data-lang="en"] [lang="zh"]{display:none!important}

.bg{
  position:fixed;inset:0;z-index:-2;pointer-events:none;
  background:
    radial-gradient(ellipse 80% 55% at 15% -10%,color-mix(in srgb,var(--accent) 18%,transparent),transparent 55%),
    radial-gradient(ellipse 70% 50% at 95% 10%,color-mix(in srgb,var(--accent-2) 16%,transparent),transparent 50%),
    radial-gradient(ellipse 60% 40% at 50% 100%,color-mix(in srgb,var(--accent) 8%,transparent),transparent 55%),
    var(--bg);
}
.bg-grain{
  position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.3;
  background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.45'/%3E%3C/svg%3E");
  background-size:180px;mix-blend-mode:multiply;
}

.wrap{width:100%;max-width:var(--max);margin:0 auto;padding:0 24px}

.nav{
  position:sticky;top:0;z-index:40;
  backdrop-filter:blur(14px);
  background:color-mix(in srgb,var(--bg) 78%,transparent);
  border-bottom:1px solid var(--line);
}
.nav-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:64px;gap:16px;
}
.brand{
  display:inline-flex;align-items:center;gap:12px;
  font-family:var(--serif);font-weight:650;font-size:1.15rem;letter-spacing:-.02em;
}
.brand img{
  width:36px;height:36px;border-radius:10px;
  box-shadow:0 8px 20px -8px color-mix(in srgb,var(--accent) 55%,transparent);
}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-link{
  font-size:.9rem;font-weight:650;color:var(--muted);
  padding:8px 12px;border-radius:999px;transition:color .2s,background .2s;
}
.nav-link:hover{color:var(--ink);background:rgba(22,22,26,.05)}
.lang{
  display:inline-flex;padding:3px;
  background:rgba(22,22,26,.06);border-radius:999px;
}
.lang button{
  border:0;background:transparent;cursor:pointer;
  font:inherit;font-size:.78rem;font-weight:700;
  color:var(--muted);padding:6px 11px;border-radius:999px;transition:.2s;
}
.lang button.active{
  background:var(--paper);color:var(--ink);
  box-shadow:0 3px 10px -3px rgba(22,22,26,.18);
}

.hero{
  position:relative;
  min-height:min(92vh,820px);
  display:flex;align-items:center;
  padding:72px 0 64px;
  overflow:hidden;
}
.hero-inner{
  display:grid;gap:28px;max-width:720px;
  animation:rise .9s cubic-bezier(.22,1,.36,1) both;
}
.brand-mark{display:inline-flex;align-items:center;gap:14px}
.brand-mark img{
  width:64px;height:64px;border-radius:18px;
  box-shadow:0 18px 40px -16px color-mix(in srgb,var(--accent) 55%,transparent);
  animation:softFloat 5.5s ease-in-out infinite;
}
.brand-name{
  font-family:var(--serif);
  font-size:clamp(2.6rem,7vw,4.4rem);
  font-weight:650;letter-spacing:-.035em;line-height:1.05;
}
.brand-name .en{
  display:block;margin-top:.12em;
  font-size:.42em;font-weight:500;letter-spacing:.08em;
  text-transform:uppercase;color:var(--accent);
}
.lead{
  font-size:clamp(1.05rem,2.2vw,1.25rem);
  color:var(--muted);max-width:36em;
}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font:inherit;font-weight:700;font-size:.95rem;
  padding:14px 22px;border-radius:999px;border:0;cursor:pointer;
  transition:transform .2s,box-shadow .2s,background .2s;
}
.btn:active{transform:translateY(1px)}
.btn-primary{
  color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-2));
  box-shadow:0 14px 30px -12px color-mix(in srgb,var(--accent) 65%,transparent);
}
.btn-primary:hover{transform:translateY(-2px)}
.btn-ghost{
  color:var(--ink);background:transparent;
  border:1px solid var(--line);
}
.btn-ghost:hover{background:rgba(22,22,26,.04)}

.section{padding:72px 0}
.section-head{max-width:560px;margin-bottom:36px}
.kicker{
  display:inline-block;font-size:.72rem;font-weight:800;
  letter-spacing:.16em;text-transform:uppercase;color:var(--accent);
  margin-bottom:12px;
}
.section-head h2{
  font-family:var(--serif);
  font-size:clamp(1.7rem,3.5vw,2.4rem);
  font-weight:650;letter-spacing:-.03em;line-height:1.15;
}
.section-head p{margin-top:12px;color:var(--muted)}

.features{display:grid;gap:18px}
@media (min-width:720px){.features{grid-template-columns:1fr 1fr;gap:20px 24px}}
.feature{
  display:grid;grid-template-columns:auto 1fr;gap:14px 16px;
  padding:22px 0;
  border-top:1px solid var(--line);
  opacity:0;transform:translateY(18px);
  transition:opacity .7s cubic-bezier(.22,1,.36,1),transform .7s cubic-bezier(.22,1,.36,1);
}
.feature.in{opacity:1;transform:none}
.feature:nth-child(2){transition-delay:.08s}
.feature:nth-child(3){transition-delay:.16s}
.feature:nth-child(4){transition-delay:.24s}
.feature-num{
  font-family:var(--serif);font-size:1.35rem;font-weight:650;color:var(--accent);
  line-height:1;padding-top:2px;
}
.feature h3{
  font-family:var(--serif);font-size:1.2rem;font-weight:650;
  letter-spacing:-.02em;margin-bottom:6px;
}
.feature p{color:var(--muted);font-size:.98rem}

.pricing{
  margin-top:8px;padding:28px 0 8px;
  border-top:1px solid var(--line);
  color:var(--muted);font-size:1rem;
}
.pricing strong{color:var(--ink);font-weight:700}

.footer{
  border-top:1px solid var(--line);
  padding:28px 0 40px;
  display:flex;flex-wrap:wrap;gap:14px 28px;
  align-items:center;justify-content:space-between;
  color:var(--muted);font-size:.9rem;
}
.footer a{font-weight:650}
.footer a:hover{color:var(--accent)}

.pp-hero{padding:64px 0 28px;max-width:760px}
.pp-hero h1{
  font-family:var(--serif);
  font-size:clamp(1.9rem,4vw,2.8rem);
  font-weight:650;letter-spacing:-.03em;line-height:1.15;
}
.pp-hero .meta{margin-top:14px;color:var(--muted);font-size:.95rem}
.pp-doc{max-width:760px;padding:12px 0 80px}
.pp-doc h2{
  font-family:var(--serif);font-size:1.25rem;font-weight:650;
  margin:28px 0 10px;letter-spacing:-.02em;
}
.pp-doc p,.pp-doc li{color:var(--muted);font-size:1rem;line-height:1.75}
.pp-doc p+p{margin-top:10px}
.pp-doc ul{margin:10px 0 0;padding-left:1.15em}
.pp-doc li{list-style:disc;margin:.35em 0}
.pp-doc b,.pp-doc strong{color:var(--ink);font-weight:700}
.pp-doc a{color:var(--accent);font-weight:650;text-decoration:underline;text-underline-offset:3px}
.pp-doc code{
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
  font-size:.88em;padding:.1em .4em;border-radius:6px;
  background:color-mix(in srgb,var(--accent) 10%,transparent);color:var(--ink);
}
.pp-doc table{
  width:100%;border-collapse:collapse;margin:14px 0 8px;font-size:.92rem;
}
.pp-doc th,.pp-doc td{
  text-align:left;padding:10px 12px;border:1px solid var(--line);vertical-align:top;
}
.pp-doc th{color:var(--ink);font-weight:700;background:color-mix(in srgb,var(--ink) 4%,transparent)}
.pp-note{
  margin:14px 0;padding:14px 16px;
  border-left:3px solid var(--accent);
  background:color-mix(in srgb,var(--accent) 10%,transparent);
  border-radius:0 10px 10px 0;color:var(--ink);font-size:.95rem;
}
.pp-note p{color:var(--ink);margin:0}

@keyframes rise{
  from{opacity:0;transform:translateY(22px)}
  to{opacity:1;transform:none}
}
@keyframes softFloat{
  0%,100%{transform:translateY(0)}
  50%{transform:translateY(-10px)}
}

@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important}
  .feature{opacity:1;transform:none}
}