:root{--green:#0e7c66;--deep:#0b5e4d;--amber:#e0a100;--bazan:#b4552d;--sky:#2e6f9e;--ink:#17241f;--slate:#38473f;--muted:#5f706a;--line:#dde6e1;--paper:#f6f8f7;--card:#fff;
--sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,Arial,sans-serif;--serif:"Lora",Georgia,"Times New Roman",serif}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.6;font-size:17px}
a{color:var(--green)}img,svg{max-width:100%;display:block}
.wrap{max-width:1080px;margin:0 auto;padding:0 20px}
.demo-tag{position:fixed;right:12px;bottom:12px;z-index:50;background:var(--ink);color:#fff;font-size:13px;padding:6px 12px;border-radius:999px;box-shadow:0 2px 8px rgba(0,0,0,.2)}
.demo-bar{background:var(--amber);color:var(--ink);font-size:14px;text-align:center;padding:6px 12px}
header.site{background:var(--card);border-bottom:1px solid var(--line)}
header.site .wrap{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:10px;padding-top:14px;padding-bottom:14px}
.logo{font-weight:700;font-size:19px;text-decoration:none;color:var(--ink);display:flex;align-items:center;gap:10px}
.logo i{width:30px;height:30px;border-radius:50%;background:radial-gradient(circle at 35% 35%,var(--amber),var(--bazan));display:inline-block}
nav.site a{text-decoration:none;color:var(--slate);margin-left:16px;font-size:15px}nav.site a.on{color:var(--green);font-weight:600}
h1,h2,h3{line-height:1.25;margin:0 0 .5em}h1{font-family:var(--serif);font-size:clamp(28px,5vw,46px)}h2{font-family:var(--serif);font-size:clamp(22px,3.4vw,32px)}
section{padding:56px 0}section.alt{background:var(--card)}
.hero{background:linear-gradient(135deg,var(--deep),var(--green));color:#fff}.hero p{color:#e6f2ee;max-width:620px}
.hero .wrap{display:grid;grid-template-columns:1.2fr 1fr;gap:32px;align-items:center}
.ph{border-radius:20px;min-height:240px;background:linear-gradient(160deg,#c98a57,var(--bazan) 55%,#5b2f1b);position:relative;overflow:hidden}
.ph:after{content:"";position:absolute;left:-10%;right:-10%;bottom:-30%;height:70%;border-radius:50%;background:rgba(14,124,102,.55)}
.ph.sky{background:linear-gradient(160deg,#9cc6e0,var(--sky))}.ph.amber{background:linear-gradient(160deg,#ffe08a,var(--amber))}
.ph span{position:absolute;left:14px;top:12px;font-size:12px;color:#fff;background:rgba(0,0,0,.3);padding:2px 8px;border-radius:8px;z-index:1}
.grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px}
.btn{display:inline-block;background:var(--amber);color:var(--ink);font-weight:600;text-decoration:none;border:0;border-radius:12px;padding:12px 20px;font-size:16px;cursor:pointer;font-family:inherit}
.btn.ghost{background:transparent;color:#fff;border:1.5px solid #fff}.btn.green{background:var(--green);color:#fff}
.btns{display:flex;flex-wrap:wrap;gap:12px;margin-top:18px}
ol.steps{padding-left:20px}ol.steps li{margin-bottom:8px}
details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 18px;margin-bottom:10px}summary{font-weight:600;cursor:pointer}
form.f{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px;max-width:560px}
form.f label{display:block;font-size:15px;font-weight:600;margin:12px 0 4px}
form.f input,form.f select,form.f textarea{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font:inherit;background:#fff}
.note{font-size:14px;color:var(--muted);margin-top:10px}.ok{display:none;background:#e6f4ef;border:1px solid var(--green);color:var(--deep);padding:10px 12px;border-radius:10px;margin-top:12px}
footer.site{background:var(--ink);color:#cdd8d3;font-size:14px;padding:28px 0 60px}footer.site a{color:#fff}
.pill{display:inline-block;font-size:13px;background:#e6f4ef;color:var(--deep);padding:3px 10px;border-radius:999px}
.scope{background:#fffbea;border:1px dashed var(--amber);border-radius:12px;padding:14px 18px;font-size:15px}
.scope ul{margin:6px 0 0;padding-left:18px}
@media (max-width:760px){.hero .wrap{grid-template-columns:1fr}nav.site a{margin:0 14px 0 0}section{padding:40px 0}body{font-size:16px}}

/* ===== v2 visual layer ===== */
:root{--shadow-soft:0 8px 24px rgba(23,36,31,.06);--shadow-lift:0 18px 48px rgba(23,36,31,.14)}
.card{box-shadow:var(--shadow-soft);transition:transform .25s ease,box-shadow .25s ease,border-color .25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lift);border-color:#bcd3ca}
.btn{transition:transform .18s ease,box-shadow .18s ease,filter .18s}.btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.18);filter:brightness(1.04)}
.hero{position:relative;overflow:hidden;padding:84px 0 96px;
 background:radial-gradient(900px 420px at 85% -10%,rgba(224,161,0,.35),transparent 60%),radial-gradient(700px 500px at -10% 110%,rgba(46,111,158,.45),transparent 60%),linear-gradient(135deg,var(--deep),var(--green) 60%,#139a7f)}
.hero:before{content:"";position:absolute;inset:auto -10% -60px -10%;height:140px;background:var(--paper);border-radius:50% 50% 0 0/100% 100% 0 0}
.hero .wrap{position:relative;z-index:1}
.hero:after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;border:60px solid rgba(255,255,255,.06)}
.ph{box-shadow:0 30px 60px rgba(0,0,0,.25);background:radial-gradient(circle at 75% 25%,#ffd36b 0 34px,transparent 35px),linear-gradient(180deg,#f3b07a,var(--bazan) 55%,#5b2f1b)}
.ph:before{content:"";position:absolute;left:-5%;right:-5%;bottom:22%;height:45%;background:#3f8f6a;clip-path:polygon(0 60%,18% 30%,34% 55%,52% 18%,70% 50%,86% 28%,100% 48%,100% 100%,0 100%);opacity:.85}
.ph.amber{background:radial-gradient(circle at 25% 30%,#fff 0 26px,transparent 27px),linear-gradient(180deg,#ffe7a3,var(--amber))}
.ph.sky{background:radial-gradient(circle at 70% 30%,#fff7d6 0 28px,transparent 29px),linear-gradient(180deg,#bfe0f2,var(--sky))}
section h2{position:relative;padding-bottom:12px}section h2:after{content:"";position:absolute;left:0;bottom:0;width:56px;height:4px;border-radius:4px;background:linear-gradient(90deg,var(--amber),var(--green))}
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}.reveal.in{opacity:1;transform:none}
details{transition:box-shadow .2s}details[open]{box-shadow:var(--shadow-soft);border-color:#bcd3ca}
form.f{box-shadow:var(--shadow-lift)}form.f input:focus,form.f select:focus,form.f textarea:focus{outline:2px solid var(--green);outline-offset:1px}
/* tier S: simple, light */
.tier-s .hero{background:linear-gradient(180deg,#e9f5f0,var(--paper));color:var(--ink)}.tier-s .hero p{color:var(--slate)}
.tier-s .hero:after{border-color:rgba(14,124,102,.08)}.tier-s .btn.ghost{color:var(--green);border-color:var(--green)}
/* tier P: brand green, layered */
.tier-p header.site{position:sticky;top:0;z-index:20;backdrop-filter:blur(8px);background:rgba(255,255,255,.88)}
/* tier C: custom, dark premium */
.tier-c{background:#fbf7ef}
.tier-c header.site{background:#1c140b;border-bottom:0}.tier-c header.site .logo,.tier-c nav.site a{color:#f5e6c8}.tier-c nav.site a.on{color:var(--amber)}
.tier-c .chero{position:relative;overflow:hidden;padding:90px 0 110px!important;background:radial-gradient(600px 400px at 80% 20%,rgba(224,161,0,.55),transparent 65%),radial-gradient(500px 400px at 10% 100%,rgba(180,85,45,.6),transparent 60%),linear-gradient(120deg,#1c140b,#3b2410 50%,#7a4a12)!important}
.tier-c .chero svg{filter:drop-shadow(0 20px 40px rgba(0,0,0,.4));animation:float 6s ease-in-out infinite}
.tier-c .card{border-color:#eedfc2;border-radius:22px}.tier-c section h2:after{background:linear-gradient(90deg,var(--bazan),var(--amber))}
.tier-c h1,.tier-c h2{letter-spacing:-.01em}
@keyframes float{50%{transform:translateY(-12px)}}
/* gallery */
.gal{display:grid;gap:32px}.show{display:grid;grid-template-columns:1fr 1.2fr;gap:36px;align-items:center;background:var(--card);border:1px solid var(--line);border-radius:28px;padding:32px;box-shadow:var(--shadow-soft)}
.show:nth-child(even){grid-template-columns:1.2fr 1fr}.show:nth-child(even) .devs{order:-1}
.devs{position:relative;height:340px}
.laptop{position:absolute;left:0;top:0;width:86%;aspect-ratio:16/10;background:#17241f;border-radius:14px;padding:10px;box-shadow:var(--shadow-lift)}
.laptop:after{content:"";position:absolute;left:-6%;right:-6%;bottom:-14px;height:14px;background:linear-gradient(#cfd8d4,#9fb0a9);border-radius:0 0 14px 14px}
.phone{position:absolute;right:0;bottom:0;width:30%;aspect-ratio:9/19;background:#17241f;border-radius:26px;padding:8px;box-shadow:var(--shadow-lift)}
.scr{width:100%;height:100%;overflow:hidden;border-radius:6px;background:#fff;position:relative}.phone .scr{border-radius:18px}
.scr iframe{border:0;pointer-events:none;transform-origin:0 0;position:absolute;left:0;top:0}
.laptop .scr iframe{width:1280px;height:800px;transform:scale(var(--k,.36))}.phone .scr iframe{width:390px;height:823px;transform:scale(var(--k,.3))}
.show:hover .laptop{transform:rotate(-1deg) translateY(-4px)}.laptop,.phone{transition:transform .4s ease}.show:hover .phone{transform:translateY(-10px)}
.tierbar{display:flex;gap:6px;margin:10px 0}.tierbar i{height:6px;flex:1;border-radius:6px;background:var(--line)}.tierbar i.on{background:linear-gradient(90deg,var(--amber),var(--green))}
@media (max-width:860px){.show,.show:nth-child(even){grid-template-columns:1fr}.show:nth-child(even) .devs{order:0}.devs{height:260px}}
@media (prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important}.reveal{opacity:1;transform:none}}

.demo-cta{background:linear-gradient(135deg,var(--ink),#22352e);color:#e6efe9;padding:40px 0}.demo-cta .btns{margin-top:0}.demo-cta p{margin:12px 0 0;font-size:15px;color:#cdd8d3}
.demo-cta .btn.ghost{color:#fff;border-color:#fff}