html,body{margin:0;padding:0}
:root{--brand:#16a34a;--brand-strong:#15803d;--brand-weak:#bbf7d0;--ink:#0f172a;--bg:#f0fdf4;--bg-soft:#dcfce7;--border:#e5e7eb;--muted:#475569;--header:#ecfdf5;--card:#f8fff9}
*{box-sizing:border-box}
html{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,"Noto Sans","Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol";-webkit-text-size-adjust:100%}
body{color:var(--ink);background:radial-gradient(1200px 600px at 10% -10%,var(--bg-soft),var(--bg) 60%) no-repeat var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:20px 24px}
header{position:sticky;top:0;background:var(--header);backdrop-filter:saturate(180%) blur(6px);border-bottom:1px solid var(--brand-weak);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:var(--brand);letter-spacing:.2px}
.brand-logo{width:28px;height:28px;border-radius:6px;object-fit:cover}
.nav-links{display:flex;gap:8px;align-items:center}
.nav-links a{padding:8px 12px;border-radius:10px;transition:background .15s,color .15s}
.nav-links a:hover{background:#d1fae5;color:#14532d}
.lang-select{padding:8px 12px;border:1px solid var(--brand-weak);border-radius:10px;background:#fff}
.hero{padding:40px 0;text-align:center}
.hero{position:relative;overflow:hidden}
.hero::before,.hero::after{content:"";position:absolute;border-radius:50%;filter:blur(40px);opacity:.35;pointer-events:none}
.hero::before{width:380px;height:380px;background:radial-gradient(circle at 30% 30%,#34d399,transparent 60%);left:-120px;top:-160px;animation:floatA 10s ease-in-out infinite}
.hero::after{width:300px;height:300px;background:radial-gradient(circle at 70% 70%,#86efac,transparent 60%);right:-100px;top:-120px;animation:floatB 12s ease-in-out infinite}
@keyframes floatA{0%{transform:translateY(0)}50%{transform:translateY(16px)}100%{transform:translateY(0)}}
@keyframes floatB{0%{transform:translateY(0)}50%{transform:translateY(-12px)}100%{transform:translateY(0)}}
._hero-tight{padding:28px 0}
.hero h1{margin:0;font-size:56px;letter-spacing:.5px;color:#14532d;line-height:1.1}
.hero p{margin:6px 0 0;color:#1f2937;font-size:17px}
.actions{margin:28px auto;display:flex;gap:12px;justify-content:center;flex-wrap:wrap}
.btn{appearance:none;border:none;border-radius:12px;padding:12px 18px;font-size:16px;cursor:pointer;transition:background .15s,transform .05s,box-shadow .15s;display:inline-flex;align-items:center;gap:8px;box-shadow:0 6px 16px rgba(22,163,74,.12)}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary{position:relative;overflow:hidden}
.btn-primary::after{content:"";position:absolute;top:0;left:-100%;width:60%;height:100%;background:linear-gradient(120deg,transparent,rgba(255,255,255,.35),transparent);transform:skewX(-20deg)}
.btn-primary:hover::after{animation:shine .8s forwards}
@keyframes shine{to{left:160%}}
.btn-primary:hover{background:var(--brand-strong);box-shadow:0 8px 20px rgba(21,128,61,.18)}
.btn-secondary{background:#eafff2;color:#14532d;border:1px solid var(--brand-weak)}
.btn-secondary:hover{background:#d1fae5}
.btn:active{transform:scale(0.98)}
.btn:focus{outline:2px solid var(--brand);outline-offset:2px}
.hint{margin-top:8px;color:#475569;font-size:14px;text-align:center}
.qr-wrap{display:flex;justify-content:center;margin:16px 0}
.qr{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--brand-weak);border-radius:12px;background:#fff;box-shadow:0 1px 2px rgba(0,0,0,.05);padding:12px;margin:0 auto}
.qr canvas{display:none!important}
.qr canvas,.qr img,.qr table{width:220px;height:220px;display:block;margin:0 auto}
.content{max-width:960px;margin:12px auto;padding:20px;border:1px solid var(--brand-weak);border-radius:16px;background:var(--card);box-shadow:0 6px 20px rgba(15,23,42,.05)}
.mobile-cta{position:fixed;left:16px;right:16px;bottom:16px;z-index:50;background:linear-gradient(180deg,#ecfdf5,#eafff2);border:1px solid var(--brand-weak);border-radius:16px;padding:12px;box-shadow:0 10px 28px rgba(15,23,42,.15)}
.mobile-cta{padding-bottom:calc(12px + env(safe-area-inset-bottom))}
.mobile-cta .btn{flex:1;justify-content:center}
.mobile-cta .btn + .btn{margin-left:8px}
.features{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:14px auto;max-width:960px;padding:0 12px}
.feature-card{position:relative;background:var(--card);border:1px solid var(--brand-weak);border-radius:14px;padding:16px;box-shadow:0 4px 16px rgba(15,23,42,.06);transition:transform .2s ease,box-shadow .2s ease}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(15,23,42,.08)}
.feature-card .icon{width:40px;height:40px;border-radius:10px;background:#d1fae5;display:flex;align-items:center;justify-content:center;color:#065f46;margin-bottom:10px}
.feature-card h3{margin:0 0 6px;font-size:18px;color:#0b3b22}
.feature-card p{margin:0;color:#1f2937;font-size:14px}
.reveal-on-scroll{opacity:0;transform:translateY(14px);transition:opacity .5s ease,transform .5s ease}
.reveal-in{opacity:1;transform:none}
.tutorial h2{font-weight:700}
.tutorial figure img{width:100%}
footer{margin-top:40px;padding:20px 0;border-top:1px solid var(--brand-weak);color:var(--muted);font-size:14px}
#mobileCta{display:none!important}
@media (max-width:640px){
  .hero{padding:36px 0}
  .hero h1{font-size:40px}
  .content{margin:12px auto;padding:16px;border-radius:12px}
  .features{grid-template-columns:1fr}
  .mobile-cta{left:12px;right:12px;bottom:12px}
  .mobile-cta{left:12px;right:12px;bottom:12px}
}
@media (prefers-color-scheme: dark){
  :root{--ink:#e5e7eb;--bg:#0b1220;--bg-soft:#0f1b2a;--border:#1f2937;--muted:#9ca3af}
  body{background:radial-gradient(1000px 500px at 10% -10%,#0f2a1b,#0b1220 60%)}
  header{background:rgba(15,23,42,.6);border-bottom-color:var(--border)}
  .nav-links a:hover{background:rgba(22,163,74,.15);color:#bbf7d0}
  .hero h1{color:#e7f5ed}
  .hero p{color:#cbd5e1}
  .btn-secondary{background:rgba(240,253,244,.06);color:#bbf7d0;border:1px solid rgba(187,247,208,.25)}
  .btn-secondary:hover{background:rgba(187,247,208,.12)}
  .content{background:#0f172a;border-color:var(--border);box-shadow:0 10px 30px rgba(0,0,0,.35)}
}