/* V71 Complete Responsive Rebuild
   ใช้ชุดเดียวกับหน้าแรก / บทความ / หมวดหมู่ / โพสต์ / เพจ about-contact
*/
:root{
  --v71-navy:#071b35;
  --v71-navy2:#0b2749;
  --v71-blue:#155b9f;
  --v71-blue2:#1f74c9;
  --v71-cyan:#56b8ff;
  --v71-sky:#eaf4ff;
  --v71-bg:#f4f7fb;
  --v71-white:#fff;
  --v71-text:#102033;
  --v71-muted:#5d6d80;
  --v71-line:#dce7f2;
  --v71-shadow:0 18px 45px rgba(7,27,53,.12);
  --v71-shadow-lg:0 26px 70px rgba(7,27,53,.18);
  --v71-container:min(1180px, calc(100% - 32px));
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  background:var(--v71-bg);
  color:var(--v71-text);
  font-family:Arial,Tahoma,sans-serif;
  line-height:1.65;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
.v71-container{width:var(--v71-container);max-width:var(--v71-container);margin-inline:auto}

/* Header */
.v71-topbar{
  background:linear-gradient(90deg,var(--v71-navy),var(--v71-navy2));
  color:#eef7ff;
  min-height:40px;
  padding:8px 16px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  font-size:13.5px;
  font-weight:800;
  border-bottom:1px solid rgba(255,255,255,.10);
}
.v71-header{
  background:#fff;
  border-bottom:1px solid var(--v71-line);
  box-shadow:0 10px 30px rgba(7,27,53,.06);
  position:sticky;
  top:0;
  z-index:500;
}
.v71-header-inner{
  width:var(--v71-container);
  max-width:var(--v71-container);
  margin:0 auto;
  min-height:88px;
  padding:14px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
}
.v71-brand a{
  display:flex;
  align-items:center;
  gap:14px;
  color:var(--v71-navy);
}
.v71-brand img{
  width:auto;
  max-width:355px;
  max-height:84px;
  object-fit:contain;
  filter:drop-shadow(0 7px 15px rgba(7,27,53,.12));
}
.v71-brand strong{
  display:block;
  color:var(--v71-navy);
  font-size:clamp(31px,2.3vw,44px);
  line-height:1.02;
  font-weight:1000;
  letter-spacing:-.045em;
}
.v71-brand small{
  display:block;
  color:var(--v71-muted);
  font-size:13px;
  line-height:1.35;
  font-weight:750;
  margin-top:4px;
}
.v71-menu-toggle{
  display:none;
  width:44px;
  height:44px;
  border:0;
  border-radius:12px;
  background:var(--v71-sky);
  color:var(--v71-navy);
  font-size:24px;
  font-weight:900;
}
.v71-nav ul{
  list-style:none;
  display:flex;
  align-items:center;
  justify-content:flex-end;
  gap:8px;
  margin:0;
  padding:0;
  flex-wrap:wrap;
}
.v71-nav a{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:44px;
  padding:12px 15px;
  border-radius:12px;
  color:var(--v71-navy);
  font-size:15px;
  line-height:1;
  font-weight:900;
  white-space:nowrap;
  transition:.18s ease;
}
.v71-nav a:hover,.v71-nav a.active{
  background:var(--v71-sky);
  color:var(--v71-blue);
}
.v71-nav li:last-child a{
  background:linear-gradient(135deg,var(--v71-blue),var(--v71-blue2));
  color:#fff;
  box-shadow:0 12px 24px rgba(21,91,159,.22);
}

/* Home Hero */
.v71-home-hero{
  position:relative;
  overflow:hidden;
  min-height:640px;
  background:radial-gradient(circle at 78% 16%,rgba(86,184,255,.16),transparent 28%),linear-gradient(135deg,#071b35,#0b2749);
}
.v71-home-hero:before{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  background:
    linear-gradient(95deg,rgba(7,27,53,.96) 0%,rgba(7,27,53,.83) 38%,rgba(7,27,53,.35) 65%,rgba(7,27,53,.08) 100%),
    url("/assets/img/hero-crane.webp"),
    url("/assets/img/hero.jpg");
  background-size:cover;
  background-position:center right;
  filter:saturate(1.08) contrast(1.02);
}
.v71-home-hero:after{
  content:"";
  position:absolute;
  inset:0;
  z-index:1;
  background:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);
  background-size:44px 44px;
  opacity:.45;
}
.v71-home-hero-inner{
  position:relative;
  z-index:2;
  min-height:640px;
  padding:78px 0;
  display:grid;
  grid-template-columns:minmax(0,1.08fr) minmax(340px,.88fr);
  align-items:center;
  gap:40px;
}
.v71-hero-copy{
  max-width:690px;
  padding:36px 38px;
  border-radius:28px;
  background:linear-gradient(180deg,rgba(255,255,255,.13),rgba(255,255,255,.07));
  border:1px solid rgba(255,255,255,.16);
  border-left:5px solid var(--v71-cyan);
  box-shadow:var(--v71-shadow-lg);
  backdrop-filter:blur(8px);
  color:#fff;
}
.v71-kicker{
  display:inline-flex;
  align-items:center;
  gap:8px;
  padding:8px 13px;
  border-radius:999px;
  background:rgba(86,184,255,.16);
  border:1px solid rgba(134,207,255,.25);
  color:#e7f6ff;
  font-size:13px;
  font-weight:900;
}
.v71-kicker:before{content:"◆";font-size:10px;color:#86cfff}
.v71-home-hero h1{
  margin:18px 0 16px;
  color:#fff;
  font-size:clamp(44px,4.9vw,76px);
  line-height:1.06;
  font-weight:1000;
  letter-spacing:-.05em;
  text-shadow:0 10px 30px rgba(0,0,0,.34);
}
.v71-home-hero h1:after,.v71-page-hero h1:after{
  content:"";
  display:block;
  width:92px;
  height:5px;
  background:linear-gradient(90deg,var(--v71-blue2),var(--v71-cyan));
  margin-top:16px;
  border-radius:999px;
}
.v71-home-hero p{
  color:rgba(255,255,255,.93);
  font-size:18px;
  line-height:1.74;
  font-weight:700;
  max-width:600px;
  margin:0 0 18px;
}
.v71-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:24px}
.v71-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  min-height:52px;
  padding:14px 22px;
  border-radius:14px;
  background:linear-gradient(135deg,var(--v71-blue2),var(--v71-cyan));
  color:#fff;
  font-weight:1000;
  border:0;
  box-shadow:0 12px 24px rgba(21,91,159,.25);
}
.v71-btn.secondary{
  background:rgba(255,255,255,.10);
  border:1px solid rgba(255,255,255,.20);
  box-shadow:none;
  color:#fff;
}
.v71-hero-stats{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-top:24px}
.v71-stat{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.13);border-radius:14px;padding:14px 15px;color:#fff}
.v71-stat strong{display:block;font-size:22px;font-weight:1000}
.v71-stat span{display:block;color:rgba(255,255,255,.75);font-size:13px;margin-top:4px}
.v71-right-card{
  justify-self:end;
  width:100%;
  max-width:480px;
  background:rgba(255,255,255,.96);
  color:var(--v71-navy);
  border-radius:26px;
  box-shadow:0 30px 70px rgba(0,0,0,.22);
  overflow:hidden;
  position:relative;
}
.v71-right-card:before,.v71-card:before,.v71-archive-card:before{
  content:"";
  position:absolute;
  left:0;
  right:0;
  top:0;
  height:6px;
  background:linear-gradient(90deg,var(--v71-blue),var(--v71-cyan));
}
.v71-right-card img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#dbe8f6}
.v71-right-body{padding:24px}
.v71-label{display:inline-flex;padding:7px 10px;border-radius:999px;background:var(--v71-sky);color:var(--v71-blue);font-size:12px;font-weight:1000}
.v71-right-card h2{margin:12px 0;color:var(--v71-navy);font-size:clamp(24px,2vw,34px);line-height:1.18;font-weight:1000;letter-spacing:-.03em}
.v71-right-card p{color:var(--v71-muted);font-size:16px;line-height:1.72;margin:0 0 16px}
.v71-mini-list{display:grid;gap:9px;margin:16px 0 0}
.v71-mini-list div{display:flex;gap:9px;color:#284057;font-weight:800;font-size:14px}
.v71-mini-list div:before{content:"✓";width:20px;height:20px;border-radius:50%;background:var(--v71-sky);color:var(--v71-blue);display:inline-flex;align-items:center;justify-content:center;font-size:12px;flex:0 0 auto}

/* Page Hero */
.v71-page-hero{
  position:relative;
  overflow:hidden;
  min-height:360px;
  background:linear-gradient(135deg,var(--v71-navy),var(--v71-navy2));
}
.v71-page-hero:before{
  content:"";
  position:absolute;
  inset:0;
  background:
    linear-gradient(95deg,rgba(7,27,53,.95),rgba(7,27,53,.76),rgba(7,27,53,.25)),
    var(--hero-img, url("/assets/img/hero-crane.webp"));
  background-size:cover;
  background-position:center right;
}
.v71-page-hero-inner{
  position:relative;
  z-index:2;
  min-height:360px;
  padding:64px 0;
  display:flex;
  align-items:center;
}
.v71-page-hero-card{
  max-width:720px;
  padding:32px 34px;
  border-radius:26px;
  background:linear-gradient(180deg,rgba(255,255,255,.13),rgba(255,255,255,.07));
  border:1px solid rgba(255,255,255,.16);
  border-left:5px solid var(--v71-cyan);
  box-shadow:var(--v71-shadow-lg);
  backdrop-filter:blur(8px);
  color:#fff;
}
.v71-page-hero h1{
  margin:16px 0;
  color:#fff;
  font-size:clamp(40px,4.3vw,68px);
  line-height:1.08;
  font-weight:1000;
  letter-spacing:-.045em;
}
.v71-page-hero p{color:rgba(255,255,255,.90);font-size:17px;line-height:1.74;margin:0;max-width:620px}

/* Strips and sections */
.v71-service-strip{position:relative;z-index:4;margin-top:-34px}
.v71-strip-box{background:#fff;border:1px solid var(--v71-line);border-radius:22px;box-shadow:var(--v71-shadow);padding:18px;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.v71-strip-item{display:flex;gap:12px;align-items:center;padding:15px;border-radius:16px;background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid #e6eef7}
.v71-icon{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--v71-blue2),var(--v71-cyan));color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;flex:0 0 auto}
.v71-strip-item strong{display:block;color:var(--v71-navy);font-size:16px;font-weight:1000}
.v71-strip-item span{display:block;color:var(--v71-muted);font-size:13px;margin-top:4px}
.v71-section{padding:70px 0}
.v71-section.white{background:#fff}
.v71-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:28px}
.v71-head h2{margin:0;color:var(--v71-navy);font-size:clamp(34px,3.35vw,56px);line-height:1.12;font-weight:1000;letter-spacing:-.04em}
.v71-head h2:after{content:"";display:block;width:84px;height:5px;background:linear-gradient(90deg,var(--v71-blue2),var(--v71-cyan));margin-top:13px;border-radius:999px}
.v71-head p{max-width:520px;color:var(--v71-muted);font-size:16px;line-height:1.7;margin:0}
.v71-grid-3{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.v71-card,.v71-archive-card,.v71-content-card{
  background:#fff;
  border:1px solid var(--v71-line);
  border-radius:22px;
  box-shadow:var(--v71-shadow);
  overflow:hidden;
  position:relative;
}
.v71-card:hover,.v71-archive-card:hover{transform:translateY(-4px);box-shadow:0 24px 55px rgba(7,27,53,.15)}
.v71-card-img,.v71-archive-media img{width:100%;aspect-ratio:16/10;object-fit:cover;background:#dce8f5}
.v71-card-body,.v71-archive-content{padding:24px}
.v71-num{display:inline-flex;align-items:center;justify-content:center;width:50px;height:50px;border-radius:16px;background:linear-gradient(135deg,var(--v71-sky),#d4ecff);color:var(--v71-blue);font-size:20px;font-weight:1000}
.v71-card h3,.v71-archive-card h2{margin:14px 0 12px;color:var(--v71-navy);font-size:26px;line-height:1.2;font-weight:1000;letter-spacing:-.02em}
.v71-card p,.v71-archive-card p{color:var(--v71-muted);font-size:16px;line-height:1.74;margin:0 0 16px}
.v71-card a,.v71-archive-card a,.v71-read-more{color:var(--v71-blue);font-weight:1000}
.v71-steps{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.v71-step{background:#fff;border:1px solid var(--v71-line);border-radius:20px;padding:24px;box-shadow:var(--v71-shadow)}
.v71-step b{display:flex;align-items:center;justify-content:center;width:42px;height:42px;border-radius:14px;background:var(--v71-navy);color:#fff;margin-bottom:14px}
.v71-step h3{margin:0 0 10px;color:var(--v71-navy);font-size:20px;font-weight:1000}
.v71-step p{margin:0;color:var(--v71-muted);line-height:1.7;font-size:15px}
.v71-area-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.v71-area{background:#fff;border:1px solid var(--v71-line);border-radius:16px;padding:16px;color:var(--v71-navy);font-weight:900;box-shadow:0 8px 22px rgba(7,27,53,.06)}
.v71-area span{display:block;color:var(--v71-muted);font-size:13px;font-weight:700;margin-top:4px}
.v71-cta{background:linear-gradient(135deg,var(--v71-navy),var(--v71-navy2));border-radius:28px;padding:42px;display:grid;grid-template-columns:1.2fr .8fr;gap:28px;align-items:center;color:#fff;box-shadow:var(--v71-shadow-lg);position:relative;overflow:hidden}
.v71-cta:after{content:"";position:absolute;right:-80px;top:-80px;width:260px;height:260px;border-radius:50%;background:rgba(86,184,255,.12)}
.v71-cta h2{margin:0 0 12px;font-size:clamp(32px,3vw,48px);line-height:1.12;font-weight:1000}
.v71-cta p{margin:0;color:rgba(255,255,255,.82);line-height:1.75}
.v71-cta .v71-actions{justify-content:flex-end;margin:0;position:relative;z-index:2}

/* Archive */
.v71-filter{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-bottom:26px}
.v71-filter strong{color:var(--v71-navy);font-weight:1000;margin-right:4px}
.v71-filter a{display:inline-flex;padding:9px 13px;border-radius:999px;background:#fff;border:1px solid var(--v71-line);color:var(--v71-blue);font-weight:900}
.v71-filter a:hover{background:var(--v71-sky)}
.v71-archive-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.v71-meta{display:flex;flex-wrap:wrap;gap:8px;color:var(--v71-muted);font-size:13px;font-weight:800;margin-bottom:8px}
.v71-meta span{background:var(--v71-sky);color:var(--v71-blue);padding:5px 9px;border-radius:999px}
.v71-placeholder{aspect-ratio:16/10;background:linear-gradient(135deg,var(--v71-navy),var(--v71-blue));color:#fff;display:flex;align-items:center;justify-content:center;font-weight:1000;font-size:22px}

/* Content */
.v71-content-wrap{padding:70px 0}
.v71-narrow{max-width:880px;margin-inline:auto;width:calc(100% - 32px)}
.v71-content-card{padding:34px}
.v71-content-card h1,.v71-content-card h2,.v71-content-card h3{color:var(--v71-navy);font-weight:1000;line-height:1.25;letter-spacing:-.02em}
.v71-content-card h2{font-size:clamp(26px,2.4vw,36px);margin:1.1em 0 .45em}
.v71-content-card p,.v71-content-card li{color:#203247;font-size:17px;line-height:1.85}
.v71-content-card a{color:var(--v71-blue);font-weight:900}
.v71-content-card img{border-radius:18px;margin:22px 0}
.v71-contact-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-top:24px}
.v71-contact-box{background:linear-gradient(180deg,#fff,#f7fbff);border:1px solid var(--v71-line);border-radius:18px;padding:20px}
.v71-contact-box strong{display:block;color:var(--v71-navy);font-size:18px;font-weight:1000;margin-bottom:8px}
.v71-contact-box p{margin:0;color:var(--v71-muted);font-size:15px}

/* Footer */
.v71-footer{background:linear-gradient(180deg,var(--v71-navy),#051122);color:#fff;margin-top:0}
.v71-footer-grid{padding:42px 0;display:grid;grid-template-columns:1.2fr .8fr .8fr;gap:24px}
.v71-footer strong{font-size:22px}
.v71-footer p,.v71-footer a{color:rgba(255,255,255,.78);line-height:1.8}
.v71-footer a{display:block;margin:6px 0}
.v71-copy{border-top:1px solid rgba(255,255,255,.10);padding:14px 0;color:rgba(255,255,255,.65);font-size:13px}

/* utility */
.v71-img-broken{display:none!important}

@media(max-width:1024px){
  .v71-home-hero-inner{grid-template-columns:1fr;min-height:auto}
  .v71-right-card{justify-self:start;max-width:640px}
  .v71-strip-box{grid-template-columns:repeat(2,minmax(0,1fr))}
  .v71-grid-3,.v71-archive-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .v71-steps,.v71-area-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .v71-cta{grid-template-columns:1fr}
  .v71-cta .v71-actions{justify-content:flex-start}
  .v71-contact-grid{grid-template-columns:1fr}
  .v71-footer-grid{grid-template-columns:1fr}
}
@media(max-width:768px){
  :root{--v71-container:calc(100% - 28px)}
  .v71-topbar{min-height:34px;font-size:12px;padding:7px 12px}
  .v71-header-inner{min-height:72px;gap:10px;flex-wrap:wrap}
  .v71-brand img{max-width:190px;max-height:58px}
  .v71-brand strong{font-size:22px}
  .v71-brand small{font-size:11px}
  .v71-menu-toggle{display:flex;align-items:center;justify-content:center;margin-left:auto}
  .v71-nav{width:100%;display:none}
  .v71-nav.is-open{display:block}
  .v71-nav ul{display:grid;grid-template-columns:1fr;gap:8px;align-items:stretch}
  .v71-nav a{width:100%;justify-content:flex-start}
  .v71-home-hero:before{background:linear-gradient(180deg,rgba(7,27,53,.95),rgba(7,27,53,.82),rgba(7,27,53,.35)),url("/assets/img/hero-crane.webp"),url("/assets/img/hero.jpg");background-size:cover;background-position:center right}
  .v71-home-hero{min-height:auto}
  .v71-home-hero-inner{min-height:auto;padding:38px 0;gap:18px}
  .v71-hero-copy{padding:24px 18px;border-radius:22px}
  .v71-home-hero h1{font-size:clamp(31px,9vw,44px)}
  .v71-home-hero p{font-size:16px}
  .v71-hero-stats{grid-template-columns:1fr}
  .v71-actions{flex-direction:column}
  .v71-btn{width:100%}
  .v71-page-hero{min-height:auto}
  .v71-page-hero-inner{min-height:auto;padding:38px 0}
  .v71-page-hero-card{padding:24px 18px;border-radius:22px}
  .v71-page-hero h1{font-size:clamp(31px,9vw,44px)}
  .v71-service-strip{margin-top:-18px}
  .v71-strip-box,.v71-grid-3,.v71-archive-grid,.v71-steps,.v71-area-grid{grid-template-columns:1fr}
  .v71-section,.v71-content-wrap{padding:42px 0}
  .v71-head{display:block}
  .v71-head h2{font-size:32px}
  .v71-head p{margin-top:12px}
  .v71-content-card{padding:24px 18px}
  .v71-cta{padding:26px 20px;border-radius:22px}
}