/* ============= AIR SERVICE - Professional Air Conditioning ============= */
:root{
  --sky:#e0f2fe;
  --sky-2:#bae6fd;
  --blue-l:#38bdf8;
  --blue:#0284c7;
  --blue-d:#0369a1;
  --navy:#0c4a6e;
  --white:#ffffff;
  --bg:#f0f9ff;
  --gray-l:#e2e8f0;
  --gray:#64748b;
  --gray-d:#334155;
  --text:#0f172a;
  --shadow-sm:0 2px 8px rgba(2,132,199,.08);
  --shadow:0 8px 24px rgba(2,132,199,.12);
  --shadow-lg:0 20px 50px rgba(2,132,199,.18);
  --green:#10b981;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Prompt','Sarabun',sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
}
a{color:var(--blue);text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}

/* ============= TOPBAR ============= */
.topbar{
  background:linear-gradient(90deg,var(--navy),var(--blue));
  color:#fff;
  padding:8px 0;
  font-size:14px;
  text-align:center;
}
.topbar strong{color:var(--sky)}

/* ============= HEADER ============= */
header{
  background:var(--white);
  box-shadow:var(--shadow-sm);
  position:sticky;top:0;z-index:100;
  padding:12px 0;
  border-bottom:3px solid var(--sky);
}
.nav{
  display:flex;justify-content:space-between;align-items:center;
  flex-wrap:wrap;gap:15px;
}
.logo{display:flex;align-items:center;gap:12px}
.logo img{
  width:50px;height:50px;border-radius:10px;
  background:var(--sky);padding:6px;
  box-shadow:var(--shadow-sm);
}
.logo-text{display:flex;flex-direction:column;line-height:1.2}
.logo-text strong{color:var(--blue-d);font-size:19px;font-weight:700}
.logo-text span{color:var(--gray);font-size:12px;letter-spacing:.5px}

.menu{
  display:flex;gap:6px;list-style:none;flex-wrap:wrap;
}
.menu a{
  padding:8px 14px;border-radius:8px;color:var(--gray-d);
  font-size:14px;font-weight:500;transition:all .25s;
}
.menu a:hover{background:var(--sky);color:var(--blue-d)}

.cta-group{display:flex;gap:8px;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:6px;
  padding:10px 18px;border-radius:30px;font-weight:600;
  font-size:14px;transition:all .25s;cursor:pointer;
  font-family:inherit;border:none;
}
.btn-call{
  background:linear-gradient(135deg,var(--blue),var(--blue-d));
  color:#fff;box-shadow:0 4px 12px rgba(2,132,199,.3);
}
.btn-call:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(2,132,199,.4)}
.btn-line{
  background:#06c755;color:#fff;
  box-shadow:0 4px 12px rgba(6,199,85,.3);
}
.btn-line:hover{background:#05a847;transform:translateY(-2px)}
.btn-outline{
  background:transparent;border:2px solid var(--blue);color:var(--blue);
}
.btn-outline:hover{background:var(--blue);color:#fff}

.menu-toggle{
  display:none;background:none;border:none;
  font-size:26px;color:var(--blue-d);cursor:pointer;
}

/* ============= HERO ============= */
.hero{
  background:
    linear-gradient(135deg,rgba(2,132,199,.85),rgba(12,74,110,.9)),
    url('https://raotd.co.th/air/pig/a1.jpg') center/cover;
  color:#fff;
  padding:80px 20px 70px;
  position:relative;
  overflow:hidden;
}
.hero::before{
  content:'';position:absolute;top:-50px;right:-50px;
  width:300px;height:300px;border-radius:50%;
  background:radial-gradient(circle,rgba(186,230,253,.2),transparent 70%);
}
.hero-inner{
  max-width:1200px;margin:0 auto;
  display:grid;grid-template-columns:1.3fr 1fr;gap:40px;align-items:center;
  position:relative;z-index:1;
}
.hero .tag{
  display:inline-block;background:rgba(255,255,255,.15);
  backdrop-filter:blur(10px);
  padding:6px 16px;border-radius:20px;
  font-size:13px;letter-spacing:.5px;margin-bottom:16px;
  border:1px solid rgba(255,255,255,.2);
}
.hero h1{
  font-size:42px;font-weight:700;line-height:1.2;
  margin-bottom:18px;letter-spacing:-.5px;
}
.hero h1 span{color:var(--sky-2);display:block}
.hero p{font-size:17px;opacity:.95;margin-bottom:25px;max-width:560px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-cta .btn{padding:14px 26px;font-size:15px}

.hero-features{
  display:flex;gap:25px;margin-top:35px;flex-wrap:wrap;
}
.hero-features div{
  display:flex;align-items:center;gap:8px;
  font-size:14px;
}
.hero-features .ico{
  width:36px;height:36px;background:rgba(255,255,255,.2);
  border-radius:50%;display:flex;align-items:center;justify-content:center;
  font-size:18px;
}

.hero-img{
  position:relative;
}
.hero-img img{
  width:100%;border-radius:20px;
  box-shadow:0 30px 60px rgba(0,0,0,.4);
  border:4px solid rgba(255,255,255,.2);
}
.hero-badge{
  position:absolute;bottom:-15px;left:-15px;
  background:#fff;color:var(--blue-d);
  padding:14px 20px;border-radius:14px;
  box-shadow:var(--shadow-lg);
  font-weight:700;display:flex;align-items:center;gap:10px;
}
.hero-badge .num{font-size:28px;color:var(--blue)}

/* ============= SECTION ============= */
section{padding:60px 0}
.section-head{text-align:center;margin-bottom:40px}
.section-head .tag{
  display:inline-block;background:var(--sky);color:var(--blue-d);
  padding:5px 14px;border-radius:14px;font-size:13px;
  font-weight:600;margin-bottom:10px;letter-spacing:.5px;
}
.section-head h2{
  font-size:34px;color:var(--navy);font-weight:700;
  letter-spacing:-.5px;line-height:1.2;
}
.section-head h2 span{color:var(--blue)}
.section-head p{color:var(--gray);margin-top:10px;font-size:15px}

/* ============= SERVICES ============= */
.services{background:var(--white)}
.services-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:18px;margin-top:30px;
}
.svc-card{
  background:var(--white);
  border:1px solid var(--gray-l);
  border-radius:16px;padding:24px 20px;
  transition:all .3s;position:relative;overflow:hidden;
}
.svc-card::before{
  content:'';position:absolute;top:0;left:0;right:0;height:3px;
  background:linear-gradient(90deg,var(--blue-l),var(--blue));
  transform:scaleX(0);transform-origin:left;transition:transform .3s;
}
.svc-card:hover{
  transform:translateY(-6px);
  border-color:var(--blue-l);
  box-shadow:var(--shadow);
}
.svc-card:hover::before{transform:scaleX(1)}
.svc-card .ico{
  width:55px;height:55px;border-radius:14px;
  background:linear-gradient(135deg,var(--sky),var(--sky-2));
  display:flex;align-items:center;justify-content:center;
  font-size:28px;margin-bottom:14px;
}
.svc-card h3{color:var(--navy);font-size:17px;margin-bottom:8px;font-weight:600}
.svc-card p{color:var(--gray);font-size:14px;line-height:1.6}

/* ============= GALLERY ============= */
.gallery{background:var(--bg)}
.gallery-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:14px;
}
.gallery-grid img{
  width:100%;height:200px;object-fit:cover;
  border-radius:12px;border:3px solid #fff;
  box-shadow:var(--shadow-sm);
  transition:all .3s;
}
.gallery-grid img:hover{
  transform:scale(1.04);
  border-color:var(--blue-l);
  box-shadow:var(--shadow);
}

/* ============= WHY ============= */
.why{
  background:linear-gradient(135deg,var(--bg),var(--sky));
}
.why-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:20px;
}
.why-item{
  background:#fff;padding:28px 22px;border-radius:18px;
  text-align:center;border:1px solid rgba(2,132,199,.1);
  transition:all .3s;
}
.why-item:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.why-item .ico{
  width:70px;height:70px;border-radius:50%;
  background:linear-gradient(135deg,var(--blue-l),var(--blue));
  color:#fff;font-size:30px;font-weight:700;
  display:flex;align-items:center;justify-content:center;
  margin:0 auto 15px;box-shadow:var(--shadow-sm);
}
.why-item h4{color:var(--navy);font-size:17px;margin-bottom:8px}
.why-item p{color:var(--gray);font-size:14px}

/* ============= CALC ============= */
.calc{background:var(--white)}
.calc-box{
  max-width:720px;margin:0 auto;
  background:linear-gradient(135deg,var(--sky),var(--white));
  border:2px solid var(--sky-2);
  border-radius:22px;padding:30px;
  box-shadow:var(--shadow);
}
.calc-row{
  display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-bottom:16px;
}
.calc-field label{
  display:block;font-weight:600;color:var(--navy);
  font-size:14px;margin-bottom:6px;
}
.calc-field select,.calc-field input{
  width:100%;padding:12px 14px;border-radius:10px;
  border:2px solid var(--sky-2);background:#fff;
  font-family:inherit;font-size:14px;color:var(--text);
  transition:all .25s;
}
.calc-field select:focus,.calc-field input:focus{
  outline:none;border-color:var(--blue);
  box-shadow:0 0 0 4px rgba(2,132,199,.1);
}
.calc-btn{
  width:100%;background:linear-gradient(135deg,var(--blue),var(--blue-d));
  color:#fff;border:none;padding:14px;border-radius:12px;
  font-family:inherit;font-size:16px;font-weight:600;
  cursor:pointer;transition:all .25s;margin-top:8px;
  box-shadow:0 6px 14px rgba(2,132,199,.3);
}
.calc-btn:hover{transform:translateY(-2px);box-shadow:0 10px 20px rgba(2,132,199,.4)}
.calc-result{
  margin-top:18px;padding:18px;
  background:#fff;border-radius:12px;
  border-left:5px solid var(--blue);
  display:none;
}
.calc-result.show{display:block;animation:slideIn .3s ease}
@keyframes slideIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}
.calc-result .price{
  font-size:28px;color:var(--blue);font-weight:700;margin:5px 0;
}
.calc-result small{color:var(--gray);font-size:13px}

/* ============= FAQ ============= */
.faq{background:var(--bg)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{
  background:#fff;border-radius:14px;
  margin-bottom:12px;overflow:hidden;
  border:1px solid var(--gray-l);transition:all .25s;
}
.faq-item:hover{border-color:var(--blue-l)}
.faq-q{
  padding:18px 22px;font-weight:600;color:var(--navy);
  cursor:pointer;display:flex;justify-content:space-between;
  align-items:center;font-size:15px;
}
.faq-q .toggle{
  width:30px;height:30px;border-radius:50%;
  background:var(--sky);color:var(--blue-d);
  display:flex;align-items:center;justify-content:center;
  font-size:18px;font-weight:700;transition:all .3s;
}
.faq-item.open .toggle{transform:rotate(45deg);background:var(--blue);color:#fff}
.faq-a{
  padding:0 22px;max-height:0;overflow:hidden;
  color:var(--gray-d);font-size:14px;line-height:1.7;
  transition:all .35s ease;
}
.faq-item.open .faq-a{padding:0 22px 18px;max-height:300px}

/* ============= REVIEWS ============= */
.reviews{background:linear-gradient(135deg,var(--white),var(--bg))}
.reviews-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));
  gap:20px;
}
.review-card{
  background:#fff;border-radius:18px;padding:0;
  overflow:hidden;border:1px solid var(--gray-l);
  transition:all .3s;
}
.review-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.review-card .img-wrap{
  height:200px;overflow:hidden;position:relative;
}
.review-card img{width:100%;height:100%;object-fit:cover;transition:all .4s}
.review-card:hover img{transform:scale(1.06)}
.review-content{padding:20px}
.stars{color:#fbbf24;font-size:18px;margin-bottom:6px}
.review-name{color:var(--navy);font-weight:600;font-size:15px;margin-bottom:6px}
.review-text{color:var(--gray-d);font-size:14px;line-height:1.6}

/* ============= NEARBY ============= */
.nearby{background:var(--white)}
.nearby-grid{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
  gap:10px;
}
.nearby-grid a{
  background:var(--bg);padding:12px 16px;border-radius:10px;
  border-left:4px solid var(--blue-l);
  color:var(--gray-d);font-size:14px;font-weight:500;
  transition:all .25s;
}
.nearby-grid a:hover{
  background:var(--blue);color:#fff;
  border-left-color:var(--navy);
  transform:translateX(4px);
}

/* ============= CTA SECTION ============= */
.cta-section{
  background:linear-gradient(135deg,var(--blue),var(--navy));
  color:#fff;text-align:center;padding:60px 20px;
}
.cta-section h2{font-size:32px;margin-bottom:10px;color:#fff}
.cta-section p{opacity:.95;margin-bottom:24px;font-size:16px}
.cta-section .hero-cta{justify-content:center}

/* ============= FOOTER ============= */
footer{
  background:var(--navy);color:#cbd5e1;
  padding:50px 20px 20px;
}
.footer-grid{
  max-width:1200px;margin:0 auto;
  display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));
  gap:30px;
}
.footer-grid h4{color:var(--sky);margin-bottom:14px;font-size:16px;font-weight:600}
.footer-grid a{color:#cbd5e1;font-size:14px;display:block;padding:4px 0}
.footer-grid a:hover{color:var(--sky)}
.footer-grid ul{list-style:none}
.copyright{
  text-align:center;padding-top:25px;margin-top:30px;
  border-top:1px solid rgba(255,255,255,.1);
  font-size:13px;color:#94a3b8;
}

/* ============= FLOATING CALL ============= */
.float-call{
  position:fixed;bottom:20px;right:20px;z-index:99;
  background:linear-gradient(135deg,var(--blue),var(--blue-d));color:#fff;
  width:60px;height:60px;border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:26px;box-shadow:0 6px 20px rgba(2,132,199,.5);
  animation:pulse 2s infinite;
}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}

/* ============= INDEX ONLY - SEARCH ============= */
.search-wrap{max-width:600px;margin:30px auto;display:flex;gap:0}
.search-wrap input{
  flex:1;padding:14px 18px;
  border:2px solid var(--sky-2);border-right:none;
  border-radius:30px 0 0 30px;font-size:15px;font-family:inherit;
  background:#fff;
}
.search-wrap input:focus{outline:none;border-color:var(--blue)}
.search-wrap button{
  padding:14px 28px;background:linear-gradient(135deg,var(--blue),var(--blue-d));
  color:#fff;border:none;border-radius:0 30px 30px 0;
  font-weight:600;cursor:pointer;font-family:inherit;
}

.tabs{
  display:flex;justify-content:center;gap:8px;
  margin:25px 0;flex-wrap:wrap;
}
.tabs button{
  padding:10px 22px;background:#fff;color:var(--gray-d);
  border:2px solid var(--gray-l);border-radius:30px;
  font-weight:600;cursor:pointer;font-family:inherit;font-size:14px;
  transition:all .25s;
}
.tabs button.active,.tabs button:hover{
  background:var(--blue);color:#fff;border-color:var(--blue);
}

.stats{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));
  gap:15px;max-width:900px;margin:0 auto 30px;
}
.stat-box{
  background:#fff;padding:22px;border-radius:14px;
  text-align:center;border:1px solid var(--gray-l);
  border-top:4px solid var(--blue);
  box-shadow:var(--shadow-sm);
}
.stat-box .num{font-size:32px;color:var(--blue);font-weight:700;line-height:1}
.stat-box .lbl{color:var(--gray);font-size:13px;margin-top:8px}

.area-list{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:10px;margin-top:20px;
}
.area-list a{
  background:#fff;padding:14px 18px;
  border-radius:10px;border-left:4px solid var(--blue-l);
  color:var(--gray-d);display:flex;justify-content:space-between;
  align-items:center;font-size:14px;
  border:1px solid var(--gray-l);border-left:4px solid var(--blue-l);
  transition:all .25s;
}
.area-list a:hover{
  background:var(--blue);color:#fff;
  border-left-color:var(--navy);
  transform:translateX(4px);
}
.area-list a .badge{
  background:var(--sky);color:var(--blue-d);
  font-size:11px;padding:3px 10px;border-radius:12px;font-weight:600;
}
.area-list a:hover .badge{background:rgba(255,255,255,.25);color:#fff}

/* ============= RESPONSIVE ============= */
@media(max-width:900px){
  .hero-inner{grid-template-columns:1fr;text-align:center}
  .hero-features{justify-content:center}
  .hero h1{font-size:32px}
  .menu{display:none;position:absolute;top:100%;left:0;right:0;background:#fff;flex-direction:column;padding:15px;box-shadow:var(--shadow);gap:0}
  .menu.show{display:flex}
  .menu a{padding:12px;border-radius:0;border-bottom:1px solid var(--gray-l)}
  .menu-toggle{display:block}
  .calc-row{grid-template-columns:1fr}
  .section-head h2{font-size:26px}
}
@media(max-width:560px){
  .hero{padding:50px 20px}
  .hero h1{font-size:26px}
  .hero p{font-size:15px}
  .hero-cta .btn{padding:12px 18px;font-size:14px}
  section{padding:45px 0}
}