/* ===== พื้นฐาน ===== */
:root{
  --brand:#2563eb;
  --ink:#0f172a;
  --ink-soft:#475569;
  --line:#e2e8f0;
  --bg:#ffffff;
  --bg-alt:#f8fafc;
  --radius:16px;
  --shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.06);
  --shadow-lg:0 20px 50px rgba(15,23,42,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
body{
  margin:0;
  font-family:"Noto Sans Thai","Sarabun",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4,h5{line-height:1.35;margin:0 0 .5em}
p{margin:0 0 1em}
.wrap{width:min(1140px,92%);margin-inline:auto}

/* ===== ปุ่ม ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.85rem 1.6rem;border-radius:999px;font-weight:600;font-size:1rem;
  border:1px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .15s,background .15s;
}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 8px 20px color-mix(in srgb,var(--brand) 32%,transparent)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px color-mix(in srgb,var(--brand) 42%,transparent)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:.6rem 1.2rem;font-size:.94rem;background:var(--brand);color:#fff}
.btn-sm:hover{filter:brightness(1.08)}
.btn-block{width:100%}

/* ===== แถบเมนูบน ===== */
.nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.88);backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:1rem}
.logo{font-size:1.35rem;font-weight:800;letter-spacing:-.02em;display:flex;align-items:center;gap:.45rem}
.logo-mark{color:var(--brand);font-size:1.05rem}
.logo-dot{color:var(--brand)}
.menu{display:flex;align-items:center;gap:1.75rem}
.menu a{font-size:.97rem;font-weight:500;color:var(--ink-soft);transition:color .15s}
.menu a:hover{color:var(--brand)}
.menu .btn-nav{
  background:var(--brand);color:#fff;padding:.55rem 1.25rem;border-radius:999px;font-weight:600;
}
.menu .btn-nav:hover{color:#fff;filter:brightness(1.08)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;padding:.5rem;cursor:pointer}
.burger span{width:24px;height:2px;background:var(--ink);border-radius:2px;transition:.25s}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== ส่วนหัวหน้าแรก ===== */
.hero{position:relative;overflow:hidden;padding:5.5rem 0 4.5rem;background:linear-gradient(180deg,#f8fbff,#fff)}
.hero-glow{
  position:absolute;inset:-40% 20% auto -10%;height:520px;pointer-events:none;
  background:radial-gradient(closest-side,color-mix(in srgb,var(--brand) 22%,transparent),transparent);
  filter:blur(20px);
}
.hero-inner{position:relative;text-align:center;max-width:820px}
.badge{
  display:inline-block;padding:.45rem 1.1rem;border-radius:999px;font-size:.86rem;font-weight:600;
  background:color-mix(in srgb,var(--brand) 10%,#fff);color:var(--brand);
  border:1px solid color-mix(in srgb,var(--brand) 25%,transparent);margin-bottom:1.5rem;
}
.hero h1{font-size:clamp(2rem,5vw,3.35rem);font-weight:800;letter-spacing:-.02em;margin-bottom:1rem}
.lead{font-size:clamp(1rem,2vw,1.15rem);color:var(--ink-soft);max-width:680px;margin-inline:auto}
.hero-btns{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap;margin-top:2rem}
.stats{display:flex;gap:3rem;justify-content:center;flex-wrap:wrap;margin-top:3.5rem}
.stat{display:flex;flex-direction:column}
.stat b{font-size:2rem;font-weight:800;color:var(--brand);line-height:1.2}
.stat span{font-size:.9rem;color:var(--ink-soft)}

/* ===== ส่วนเนื้อหา ===== */
.sec{padding:5rem 0}
.sec-alt{background:var(--bg-alt);border-block:1px solid var(--line)}
.sec-head{text-align:center;max-width:640px;margin:0 auto 3rem}
.sec-head h2{font-size:clamp(1.6rem,3.5vw,2.3rem);font-weight:800;letter-spacing:-.02em}
.sec-head p{color:var(--ink-soft);margin:0}
.grid{display:grid;gap:1.5rem}
.grid-3{grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.grid-2{grid-template-columns:repeat(auto-fit,minmax(330px,1fr))}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:1.9rem;
  box-shadow:var(--shadow);transition:transform .18s,box-shadow .18s,border-color .18s;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:color-mix(in srgb,var(--brand) 35%,var(--line))}
.card .icon{font-size:1.9rem;margin-bottom:.6rem}
.card h3{font-size:1.14rem;font-weight:700}
.card p{color:var(--ink-soft);font-size:.96rem;margin:0}

/* ===== การ์ดสินค้า ===== */
.pcard{
  position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:2rem;display:flex;flex-direction:column;box-shadow:var(--shadow);
  transition:transform .18s,box-shadow .18s;
}
.pcard:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.pcard-hot{border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 12%,transparent),var(--shadow)}
.pbadge{
  position:absolute;top:-12px;right:1.6rem;background:var(--brand);color:#fff;
  font-size:.78rem;font-weight:700;padding:.28rem .9rem;border-radius:999px;
}
.pcard h3{font-size:1.28rem;font-weight:800;margin-bottom:.2rem}
.ptag{color:var(--brand);font-weight:600;font-size:.95rem;margin-bottom:.8rem}
.pdesc{color:var(--ink-soft);font-size:.96rem}
.plist{list-style:none;padding:0;margin:.4rem 0 1.4rem;display:grid;gap:.45rem}
.plist li{position:relative;padding-left:1.7rem;font-size:.94rem;color:var(--ink-soft)}
.plist li::before{
  content:"✓";position:absolute;left:0;top:0;width:1.15rem;height:1.15rem;line-height:1.15rem;
  text-align:center;border-radius:50%;font-size:.72rem;font-weight:700;
  background:color-mix(in srgb,var(--brand) 12%,#fff);color:var(--brand);
}
.pfoot{margin-top:auto;padding-top:1.2rem;border-top:1px dashed var(--line);
  display:flex;align-items:center;justify-content:space-between;gap:1rem;flex-wrap:wrap}
.price{font-size:1.12rem;font-weight:800;color:var(--ink)}

/* ===== เกี่ยวกับเรา ===== */
.about-wrap{display:grid;grid-template-columns:1.25fr .9fr;gap:3rem;align-items:start}
.about-wrap h2{font-size:clamp(1.6rem,3.5vw,2.3rem);font-weight:800;letter-spacing:-.02em}
.about-text{color:var(--ink-soft)}
.about-box{background:var(--bg-alt);border:1px solid var(--line);border-radius:var(--radius);padding:2rem}
.about-box h4{font-size:1.05rem;font-weight:800;margin-bottom:1rem}
.checklist{list-style:none;padding:0;margin:0;display:grid;gap:.8rem}
.checklist li{position:relative;padding-left:1.9rem;font-size:.95rem;color:var(--ink-soft)}
.checklist li::before{
  content:"✓";position:absolute;left:0;top:.15rem;width:1.3rem;height:1.3rem;line-height:1.3rem;
  text-align:center;border-radius:50%;background:var(--brand);color:#fff;font-size:.78rem;font-weight:700;
}

/* ===== ติดต่อ ===== */
.contact-wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:2rem;align-items:start}
.channels{display:grid;gap:1rem;align-content:start}
.chan{
  display:flex;align-items:center;gap:1rem;background:#fff;border:1px solid var(--line);
  border-radius:14px;padding:1.1rem 1.3rem;transition:transform .15s,border-color .15s;
}
a.chan:hover{transform:translateX(4px);border-color:var(--brand)}
.chan-icon{font-size:1.5rem}
.chan-body{display:flex;flex-direction:column;min-width:0}
.chan-body small{font-size:.8rem;color:var(--ink-soft)}
.chan-body b{font-size:1.02rem;word-break:break-word}

.form{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:2rem;box-shadow:var(--shadow)}
.form h3{font-size:1.2rem;font-weight:800;margin-bottom:1.2rem}
.form label{display:block;font-size:.92rem;font-weight:600;margin-bottom:1rem}
.form label span{color:#dc2626}
.form input[type=text],.form input[type=password],.form textarea,.form select{
  width:100%;margin-top:.4rem;padding:.8rem 1rem;border:1px solid var(--line);border-radius:11px;
  font:inherit;font-weight:400;background:#fff;color:var(--ink);transition:border-color .15s,box-shadow .15s;
}
.form input:focus,.form textarea:focus,.form select:focus{
  outline:none;border-color:var(--brand);box-shadow:0 0 0 3px color-mix(in srgb,var(--brand) 15%,transparent);
}
.form textarea{resize:vertical}
.hp{position:absolute!important;left:-9999px!important;width:1px!important;height:1px!important;opacity:0}
.alert{padding:.85rem 1.1rem;border-radius:11px;font-size:.94rem;margin-bottom:1.2rem;font-weight:500}
.alert-ok{background:#ecfdf5;color:#065f46;border:1px solid #a7f3d0}
.alert-err{background:#fef2f2;color:#991b1b;border:1px solid #fecaca}

/* ===== ท้ายเว็บ ===== */
.footer{background:#0f172a;color:#cbd5e1;padding:3.5rem 0 1.5rem;font-size:.94rem}
.foot-grid{display:grid;grid-template-columns:1.5fr 1fr 1.2fr;gap:2.5rem}
.logo-foot{color:#fff;margin-bottom:.8rem;font-size:1.25rem}
.foot-about{color:#94a3b8;margin:0;max-width:380px}
.footer h5{color:#fff;font-size:1rem;font-weight:700;margin-bottom:1rem}
.foot-links{list-style:none;padding:0;margin:0;display:grid;gap:.6rem}
.foot-links a,.foot-links span{color:#94a3b8;transition:color .15s}
.foot-links a:hover{color:#fff}
.foot-bottom{
  margin-top:2.5rem;padding-top:1.4rem;border-top:1px solid #1e293b;
  display:flex;justify-content:space-between;align-items:center;gap:1rem;flex-wrap:wrap;
  color:#64748b;font-size:.88rem;
}
.foot-admin{color:#64748b;border:1px solid #1e293b;padding:.35rem .9rem;border-radius:999px;transition:.15s}
.foot-admin:hover{color:#fff;border-color:#334155}

/* ===== จอเล็ก ===== */
@media (max-width:900px){
  .about-wrap,.contact-wrap{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr;gap:2rem}
}
@media (max-width:760px){
  .burger{display:flex}
  .menu{
    position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg);
    padding:.5rem 6% 1.2rem;display:none;
  }
  .menu.open{display:flex}
  .menu a{padding:.9rem 0;border-bottom:1px solid var(--line)}
  .menu .btn-nav{text-align:center;margin-top:1rem;border-bottom:0}
  .stats{gap:2rem}
  .sec{padding:3.5rem 0}
  .hero{padding:3.5rem 0 3rem}
}