:root{
  --bg:#F6F7F9;--surface:#fff;--ink:#111418;--muted:#5f6a78;--line:#E6E8EC;
  --accent:#2a78d6;--accent-ink:#1c5cab;--accent-soft:#E9F1FC;--good:#0a8a3a;--warn:#b57a00;
  --radius:14px;--shadow:0 1px 2px rgba(17,20,24,.05),0 8px 24px rgba(17,20,24,.06);
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"IBM Plex Sans Thai","Noto Sans Thai",system-ui,-apple-system,"Segoe UI",sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--accent-ink);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
h1,h2,h3{line-height:1.25;margin:0 0 .4em;font-weight:700;letter-spacing:-.01em}
h1{font-size:clamp(1.9rem,4.2vw,3rem)}
h2{font-size:clamp(1.4rem,2.6vw,2rem)}
h3{font-size:1.15rem}
p{margin:0 0 1em}
.muted{color:var(--muted)}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.btn{display:inline-flex;align-items:center;gap:.5em;padding:.75em 1.3em;border-radius:999px;font-weight:600;border:1.5px solid transparent;cursor:pointer;font-size:1rem;font-family:inherit;transition:.15s;white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--accent);color:#fff}
.btn-primary:hover{background:var(--accent-ink)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--accent)}
.btn-lg{font-size:1.08rem;padding:.9em 1.6em}
/* header */
.nav{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.9);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:1.4rem;height:64px}
.brand{display:flex;align-items:center;gap:.6rem;font-weight:700;font-size:1.15rem;color:var(--ink)}
.brand svg{width:30px;height:30px}
.nav nav{display:flex;gap:1.2rem;margin-left:auto;align-items:center}
.nav nav a{color:var(--ink);font-weight:500}
.nav nav a:hover{color:var(--accent-ink);text-decoration:none}
.nav .btn{padding:.55em 1.1em}
@media(max-width:760px){.nav nav a:not(.btn){display:none}}
/* hero */
.hero{padding:64px 0 32px}
.hero .wrap{display:grid;grid-template-columns:1.05fr 1fr;gap:40px;align-items:center}
.hero .eyebrow{display:inline-block;background:var(--accent-soft);color:var(--accent-ink);font-weight:600;padding:.3em .9em;border-radius:999px;font-size:.9rem;margin-bottom:1rem}
.hero p.lead{font-size:1.15rem;color:var(--muted);max-width:34em}
.hero .cta{display:flex;gap:.8rem;flex-wrap:wrap;margin:1.4rem 0 1rem}
.hero .fine{font-size:.9rem;color:var(--muted)}
.shot{border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--line);overflow:hidden;background:#fff;aspect-ratio:5/4}
.shot img{width:100%;height:100%;object-fit:cover;object-position:top left}
@media(max-width:860px){.hero .wrap{grid-template-columns:1fr}.hero{padding-top:40px}}
/* sections */
section{padding:56px 0}
section.alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{max-width:46em;margin-bottom:28px}
.sec-head p{color:var(--muted);font-size:1.05rem}
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:600px){.g3,.g2,.g4{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:0 1px 2px rgba(17,20,24,.04)}
.card .ic{width:40px;height:40px;border-radius:10px;background:var(--accent-soft);color:var(--accent-ink);display:grid;place-items:center;margin-bottom:12px}
.card .ic svg{width:22px;height:22px}
.card h3{margin-bottom:.3em}
.card p{color:var(--muted);margin:0;font-size:.97rem}
/* pages gallery */
.pages{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media(max-width:900px){.pages{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.pages{grid-template-columns:1fr}}
.page{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.page .thumb{aspect-ratio:7/5;overflow:hidden;border-bottom:1px solid var(--line);background:#eef1f5}
.page .thumb img{width:100%;height:100%;object-fit:cover;object-position:top left}
.page .body{padding:14px 16px}
.page .body h3{font-size:1.02rem;margin-bottom:.2em}
.page .body p{font-size:.92rem;color:var(--muted);margin:0}
/* steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
@media(max-width:900px){.steps{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.steps{grid-template-columns:1fr}}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px 20px}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-14px;left:18px;width:30px;height:30px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:grid;place-items:center;font-size:.95rem}
.step h3{font-size:1.05rem;margin:.2em 0 .3em}
.step p{color:var(--muted);font-size:.95rem;margin:0}
/* pricing */
.plans{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;align-items:stretch}
@media(max-width:900px){.plans{grid-template-columns:1fr}}
.plan{background:#fff;border:1px solid var(--line);border-radius:18px;padding:26px;display:flex;flex-direction:column;position:relative}
.plan.featured{border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft),var(--shadow)}
.plan .tag{position:absolute;top:-13px;left:24px;background:var(--accent);color:#fff;font-size:.8rem;font-weight:600;padding:.25em .8em;border-radius:999px}
.plan .name{font-weight:700;font-size:1.2rem}
.plan .who{color:var(--muted);font-size:.93rem;min-height:2.6em}
.plan .price{margin:14px 0 4px;font-size:2.1rem;font-weight:700;letter-spacing:-.02em}
.plan .price small{font-size:1rem;font-weight:500;color:var(--muted)}
.plan .alt{color:var(--muted);font-size:.9rem;margin-bottom:14px}
.plan ul{list-style:none;padding:0;margin:0 0 20px}
.plan li{padding:.35em 0 .35em 1.7em;position:relative;font-size:.97rem;border-top:1px dashed var(--line)}
.plan li:first-child{border-top:0}
.plan li::before{content:"";position:absolute;left:0;top:.75em;width:16px;height:16px;border-radius:50%;background:var(--accent-soft)}
.plan li::after{content:"";position:absolute;left:5px;top:1.05em;width:6px;height:3px;border-left:2px solid var(--accent-ink);border-bottom:2px solid var(--accent-ink);transform:rotate(-45deg)}
.plan .btn{margin-top:auto;justify-content:center}
.note{background:var(--accent-soft);border-radius:12px;padding:14px 18px;font-size:.95rem;margin-top:18px}
/* faq */
details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:0 18px;margin-bottom:10px}
summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:1rem}
summary::-webkit-details-marker{display:none}
summary::after{content:"+";color:var(--accent-ink);font-size:1.3rem;line-height:1}
details[open] summary::after{content:"–"}
details p{color:var(--muted);padding-bottom:14px;margin:0}
/* cta band */
.band{background:linear-gradient(135deg,#1c5cab,#2a78d6);color:#fff;border-radius:22px;padding:40px;display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap}
.band h2{color:#fff;margin:0 0 .2em}
.band p{margin:0;opacity:.92}
.band .btn-primary{background:#fff;color:var(--accent-ink)}
/* footer */
footer{padding:36px 0 48px;color:var(--muted);font-size:.92rem}
footer .wrap{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:24px}
@media(max-width:760px){footer .wrap{grid-template-columns:1fr}}
footer h4{color:var(--ink);margin:0 0 .5em;font-size:.95rem}
footer a{color:var(--muted)}
footer ul{list-style:none;padding:0;margin:0}
footer li{margin:.25em 0}
.legal{border-top:1px solid var(--line);margin-top:18px;padding-top:14px;font-size:.85rem}
/* forms */
form .row{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media(max-width:600px){form .row{grid-template-columns:1fr}}
label{display:block;font-weight:600;font-size:.93rem;margin:12px 0 6px}
label small{font-weight:400;color:var(--muted)}
input,select,textarea{width:100%;padding:.7em .9em;border:1.5px solid var(--line);border-radius:10px;font:inherit;background:#fff;color:var(--ink)}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}
.radio{display:flex;gap:10px;flex-wrap:wrap}
.radio label{flex:1;border:1.5px solid var(--line);border-radius:10px;padding:10px 12px;margin:0;cursor:pointer;font-weight:500;display:flex;gap:.6em;align-items:center;min-width:140px}
.radio label:has(input:checked){border-color:var(--accent);background:var(--accent-soft)}
.radio input{width:auto}
.hp{position:absolute;left:-9999px;opacity:0;height:0;width:0}
.msg{display:none;border-radius:12px;padding:16px 18px;margin-top:16px}
.msg.ok{display:block;background:#E6F6EC;color:#0a5a28}
.msg.err{display:block;background:#FDF1F0;color:#8a2522}
.doc{max-width:760px}
.doc h2{margin-top:1.6em;font-size:1.3rem}
.doc ol,.doc ul{padding-left:1.4em}
.doc li{margin:.3em 0}
code{background:#eef1f5;padding:.1em .4em;border-radius:6px;font-size:.92em}
pre{background:#111418;color:#e8ecf1;padding:14px 16px;border-radius:12px;overflow:auto;font-size:.9rem}
pre code{background:none;padding:0;color:inherit}
.kv{display:grid;grid-template-columns:auto 1fr;gap:6px 16px;font-size:.95rem}
.kv dt{color:var(--muted)}.kv dd{margin:0}
.badge{display:inline-block;background:#FFF4E0;color:#8a5a00;font-size:.8rem;font-weight:600;padding:.2em .7em;border-radius:999px;vertical-align:middle}