/* ===== Reset & base ===== */
* { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  --blue-900: #0c2f56;
  --blue-800: #123f73;
  --blue-700: #16508f;
  --blue-600: #1b62ac;
  --blue-500: #2377c9;
  --blue-400: #4a94dd;
  --blue-100: #e8f2fc;
  --blue-50: #f4f9fe;
  --orange: #f5821f;
  --orange-dark: #d76a0f;
  --gray-900: #1a2233;
  --gray-700: #4a5568;
  --gray-500: #7c8aa0;
  --gray-200: #e4e9f1;
  --gray-100: #f2f5f9;
  --white: #ffffff;
  --radius: 14px;
  --shadow-sm: 0 2px 10px rgba(12, 47, 86, 0.07);
  --shadow-md: 0 8px 28px rgba(12, 47, 86, 0.12);
  --shadow-lg: 0 20px 50px rgba(12, 47, 86, 0.18);
  --container: 1200px;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Kanit', 'Noto Sans Thai', 'Leelawadee UI', 'Tahoma', sans-serif;
  color: var(--gray-900);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }

a { text-decoration: none; color: inherit; }

ul { list-style: none; }

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

section { position: relative; }

.section-pad { padding: 96px 0; }

@media (max-width: 768px) {
  .section-pad { padding: 64px 0; }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--orange);
  background: rgba(245, 130, 31, 0.1);
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 18px;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
}

.section-title {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 700;
  color: var(--blue-900);
  line-height: 1.25;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 17px;
  color: var(--gray-700);
  max-width: 680px;
  margin-bottom: 20px;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-head .section-desc { margin-left: auto; margin-right: auto; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 15px;
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--orange), var(--orange-dark));
  color: var(--white);
  box-shadow: 0 10px 24px rgba(245, 130, 31, 0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(245, 130, 31, 0.45); }

.btn-outline {
  background: rgba(255, 255, 255, 0.08);
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(4px);
}
.btn-outline:hover { background: rgba(255, 255, 255, 0.2); }

.btn-blue {
  background: var(--blue-600);
  color: var(--white);
  box-shadow: 0 10px 24px rgba(27, 98, 172, 0.3);
}
.btn-blue:hover { background: var(--blue-700); transform: translateY(-2px); }

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 18px 0;
  transition: all 0.3s ease;
  background: transparent;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: var(--shadow-sm);
  padding: 12px 0;
  backdrop-filter: blur(10px);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 24px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--white);
  transition: color 0.3s ease;
}

.site-header.scrolled .logo { color: var(--blue-900); }

.logo .logo-img {
  height: 34px;
  width: auto;
  display: block;
  background: rgba(255, 255, 255, 0.94);
  padding: 6px 12px;
  border-radius: 10px;
  box-shadow: 0 2px 10px rgba(12, 47, 86, 0.15);
}

.logo .logo-sub {
  display: block;
  font-size: 11px;
  font-weight: 400;
  opacity: 0.75;
  letter-spacing: 0.02em;
  color: var(--white);
}

.site-header.scrolled .logo .logo-sub { color: var(--gray-700); }
.footer-brand .logo .logo-sub { color: rgba(255,255,255,0.6); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 34px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--white);
  position: relative;
  padding: 6px 0;
  transition: color 0.3s ease;
}

.site-header.scrolled .nav-links a { color: var(--gray-900); }

.nav-links a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 2px;
  background: var(--orange);
  transition: width 0.25s ease;
}
.nav-links a:hover::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 16px; }

.header-tel {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 600;
  color: var(--white);
  font-size: 15px;
}
.site-header.scrolled .header-tel { color: var(--blue-900); }
.header-tel svg { flex-shrink: 0; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 6px;
  z-index: 1100;
}
.hamburger span {
  width: 26px; height: 2.5px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.site-header.scrolled .hamburger span { background: var(--blue-900); }
.hamburger.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

@media (max-width: 980px) {
  .nav-links {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 78vw);
    height: 100vh;
    background: var(--blue-900);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 26px;
    padding: 40px;
    transition: right 0.35s ease;
    box-shadow: -10px 0 40px rgba(0,0,0,0.25);
  }
  .nav-links.open { right: 0; }
  .nav-links a,
  .site-header.scrolled .nav-links a { color: var(--white); font-size: 18px; }
  .header-tel span.tel-text { display: none; }
  .hamburger { display: flex; }
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(115deg, var(--blue-900) 20%, var(--blue-700) 55%, var(--blue-600) 100%);
  overflow: hidden;
  padding-top: 90px;
}

.hero-bg-img {
  position: absolute;
  inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  opacity: 0.34;
  mix-blend-mode: luminosity;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(9,32,60,0.96) 10%, rgba(12,47,86,0.75) 50%, rgba(22,80,143,0.55) 100%);
}

.hero-shape {
  position: absolute;
  right: -8%;
  top: 50%;
  transform: translateY(-50%);
  width: 620px; height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(74,148,221,0.35), transparent 70%);
  z-index: 1;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero-content .eyebrow { background: rgba(255,255,255,0.12); color: #ffcb96; }
.hero-content .eyebrow::before { background: var(--orange); }

.hero-title {
  font-size: clamp(34px, 5vw, 56px);
  font-weight: 700;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 22px;
}
.hero-title span { color: #ffb46b; }

.hero-desc {
  font-size: 18px;
  color: rgba(255,255,255,0.85);
  max-width: 560px;
  margin-bottom: 34px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 52px; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, auto);
  gap: 34px;
}

.hero-stat b {
  display: block;
  font-size: 30px;
  font-weight: 700;
  color: var(--white);
}
.hero-stat span {
  font-size: 13.5px;
  color: rgba(255,255,255,0.7);
}

.hero-visual {
  position: relative;
  z-index: 2;
}

.hero-card {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.18);
  backdrop-filter: blur(14px);
  border-radius: 22px;
  padding: 22px;
  box-shadow: var(--shadow-lg);
}

.hero-card img { border-radius: 14px; width: 100%; max-height: 46vh; object-fit: contain; margin: 0 auto; }

.hero-card-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 6px 4px;
  color: var(--white);
}
.hero-card-caption b { font-size: 15px; font-weight: 600; }
.hero-card-caption span { font-size: 12.5px; color: rgba(255,255,255,0.65); }

@media (max-width: 980px) {
  .hero { min-height: auto; padding: 130px 0 60px; align-items: flex-start; }
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; grid-template-columns: repeat(2, auto); row-gap: 24px; }
  .hero-visual { max-width: 320px; margin: 44px auto 0; }
}

@media (max-width: 480px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Marquee / trust strip ===== */
.trust-strip {
  background: var(--blue-900);
  padding: 20px 0;
  overflow: hidden;
}
.trust-strip .track {
  display: flex;
  gap: 60px;
  white-space: nowrap;
  animation: scroll-left 26s linear infinite;
  width: max-content;
}
.trust-strip span {
  color: rgba(255,255,255,0.75);
  font-size: 14.5px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
}
.trust-strip span::before { content: "\2726"; color: var(--orange); }
@keyframes scroll-left {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ===== About ===== */
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 64px;
  align-items: center;
}

.about-media { position: relative; }
.about-media img {
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  width: 100%;
}
.about-badge {
  position: absolute;
  bottom: -28px;
  left: -28px;
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-md);
  padding: 20px 26px;
  display: flex;
  align-items: center;
  gap: 14px;
}
.about-badge .num { font-size: 30px; font-weight: 700; color: var(--blue-700); }
.about-badge .lbl { font-size: 13px; color: var(--gray-700); max-width: 110px; line-height: 1.3; }

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0 30px;
}
.about-tags span {
  background: var(--blue-50);
  color: var(--blue-700);
  border: 1px solid var(--blue-100);
  font-size: 13.5px;
  font-weight: 500;
  padding: 9px 16px;
  border-radius: 999px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-top: 36px;
}
.about-stats .stat-box {
  background: var(--gray-100);
  border-radius: 12px;
  padding: 18px 14px;
  text-align: center;
}
.about-stats .stat-box b { display: block; font-size: 24px; color: var(--blue-800); font-weight: 700; }
.about-stats .stat-box span { font-size: 12.5px; color: var(--gray-700); }

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 50px; }
  .about-badge { left: 50%; transform: translateX(-50%); bottom: -24px; }
  .about-stats { grid-template-columns: repeat(2, 1fr); }
}

/* ===== Factory / workshop ===== */
.factory-section { background: var(--blue-50); }
.factory-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.factory-media img { border-radius: var(--radius); box-shadow: var(--shadow-md); }

.workshop-list { display: grid; gap: 16px; }
.workshop-item {
  display: flex;
  gap: 16px;
  background: var(--white);
  padding: 18px 20px;
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}
.workshop-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--blue-500), var(--blue-700));
  display: flex; align-items: center; justify-content: center;
  color: white; font-weight: 700; flex-shrink: 0;
  font-size: 18px;
}
.workshop-item h4 { font-size: 16.5px; color: var(--blue-900); margin-bottom: 4px; font-weight: 600; }
.workshop-item p { font-size: 14px; color: var(--gray-700); }

@media (max-width: 900px) {
  .factory-grid { grid-template-columns: 1fr; }
  .factory-grid { gap: 36px; }
}

/* ===== Honors ===== */
.honors-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 56px;
  align-items: center;
}
.honors-media img { border-radius: var(--radius); }
.honors-stats { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.honor-stat {
  background: linear-gradient(135deg, var(--blue-800), var(--blue-600));
  border-radius: var(--radius);
  padding: 28px 24px;
  color: var(--white);
  position: relative;
  overflow: hidden;
}
.honor-stat b { font-size: 36px; font-weight: 700; color: #ffcb96; display: block; }
.honor-stat span { font-size: 14.5px; color: rgba(255,255,255,0.85); }

@media (max-width: 900px) {
  .honors-grid { grid-template-columns: 1fr; }
  .honors-media { max-width: 320px; margin: 0 auto; }
}

/* ===== Products ===== */
.products-section { background: var(--gray-100); }

.filter-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 46px;
}
.filter-tabs button {
  padding: 10px 24px;
  border-radius: 999px;
  border: 1.5px solid var(--gray-200);
  background: var(--white);
  color: var(--gray-700);
  font-weight: 500;
  font-size: 14.5px;
  cursor: pointer;
  transition: all 0.25s ease;
  font-family: inherit;
}
.filter-tabs button:hover { border-color: var(--blue-400); color: var(--blue-600); }
.filter-tabs button.active {
  background: var(--blue-700);
  border-color: var(--blue-700);
  color: var(--white);
  box-shadow: 0 8px 18px rgba(27,98,172,0.25);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 26px;
}
@media (max-width: 1100px) { .product-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .product-grid { grid-template-columns: 1fr; } }

.product-card {
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  display: flex;
  flex-direction: column;
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }

.product-card .tag {
  position: absolute;
  top: 14px; left: 14px;
  background: var(--orange);
  color: var(--white);
  font-size: 11.5px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
  z-index: 2;
}

.product-thumb {
  position: relative;
  background: linear-gradient(160deg, var(--blue-50), #fff);
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  height: 240px;
}
.product-thumb img { max-height: 100%; width: auto; margin: 0 auto; }

.product-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.product-body h3 { font-size: 16.5px; color: var(--blue-900); font-weight: 700; margin-bottom: 4px; }
.product-body .model { font-size: 12.5px; color: var(--gray-500); margin-bottom: 14px; }

.spec-list { list-style: none; margin-bottom: 16px; flex: 1; }
.spec-list li {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 13px;
  color: var(--gray-700);
  padding: 6px 0;
  border-bottom: 1px dashed var(--gray-200);
}
.spec-list li span:first-child { color: var(--gray-500); }
.spec-list li b { color: var(--gray-900); font-weight: 600; text-align: right; }

.product-card .btn-detail {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13.5px;
  font-weight: 600;
  color: var(--blue-700);
  margin-top: auto;
}
.product-card .btn-detail svg { transition: transform 0.2s ease; }
.product-card:hover .btn-detail svg { transform: translateX(4px); }

/* ===== Solutions ===== */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
@media (max-width: 1000px) { .solution-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .solution-grid { grid-template-columns: 1fr; } }

.solution-card {
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius);
  padding: 30px 24px;
  transition: all 0.3s ease;
}
.solution-card:hover { border-color: var(--blue-400); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.solution-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--orange);
  margin-bottom: 14px;
  letter-spacing: 0.05em;
}
.solution-card h3 { font-size: 18px; color: var(--blue-900); margin-bottom: 12px; font-weight: 700; }
.solution-card ul { display: grid; gap: 9px; }
.solution-card ul li {
  font-size: 13.8px;
  color: var(--gray-700);
  padding-left: 18px;
  position: relative;
}
.solution-card ul li::before {
  content: "";
  position: absolute;
  left: 0; top: 8px;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-500);
}

/* ===== Warranty ===== */
.warranty-section {
  background: linear-gradient(120deg, var(--blue-900), var(--blue-700));
  color: var(--white);
}
.warranty-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 20px;
}
@media (max-width: 900px) { .warranty-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .warranty-grid { grid-template-columns: 1fr; } }

.warranty-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: var(--radius);
  padding: 26px 22px;
  backdrop-filter: blur(6px);
}
.warranty-card .icon-circle {
  width: 46px; height: 46px;
  border-radius: 50%;
  background: rgba(245,130,31,0.18);
  color: var(--orange);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 16px;
  font-weight: 700;
}
.warranty-card h4 { font-size: 16px; margin-bottom: 8px; font-weight: 600; }
.warranty-card p { font-size: 13.8px; color: rgba(255,255,255,0.78); }

.warranty-section .section-head .section-desc,
.warranty-section .section-title { color: var(--white); }
.warranty-section .section-desc { color: rgba(255,255,255,0.78); }

/* ===== Gallery ===== */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
@media (max-width: 900px) { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .gallery-grid { grid-template-columns: 1fr; } }

.gallery-item {
  position: relative;
  border-radius: 12px;
  overflow: hidden;
  height: 220px;
  box-shadow: var(--shadow-sm);
}
.gallery-item img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.gallery-item:hover img { transform: scale(1.08); }
.gallery-caption {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  padding: 16px;
  background: linear-gradient(0deg, rgba(9,32,60,0.9), transparent);
  color: var(--white);
  font-size: 13.5px;
  font-weight: 500;
}

/* ===== International ===== */
.intl-section { background: var(--blue-50); }
.intl-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.intl-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin: 28px 0 30px;
}
.intl-stats .stat-box {
  background: var(--white);
  border-radius: 12px;
  padding: 20px 12px;
  text-align: center;
  box-shadow: var(--shadow-sm);
}
.intl-stats .stat-box b { display: block; font-size: 26px; color: var(--blue-700); font-weight: 700; }
.intl-stats .stat-box span { font-size: 12px; color: var(--gray-700); }

.intl-highlight {
  background: var(--white);
  border-left: 4px solid var(--orange);
  border-radius: 10px;
  padding: 20px 22px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 26px;
}
.intl-highlight b { color: var(--blue-900); font-size: 15px; }
.intl-highlight p { font-size: 14px; color: var(--gray-700); margin-top: 6px; }

.intl-photos { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.intl-photos img { border-radius: 12px; box-shadow: var(--shadow-sm); height: 100%; object-fit: cover; }
.intl-photos .wide { grid-column: 1 / -1; }

@media (max-width: 900px) {
  .intl-grid { grid-template-columns: 1fr; }
  .intl-stats { grid-template-columns: repeat(3, 1fr); }
}

/* ===== Promo banner ===== */
.promo-banner {
  display: block;
  max-width: var(--container);
  margin: 0 auto;
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.promo-banner:hover { transform: translateY(-4px); box-shadow: 0 26px 60px rgba(12,47,86,0.28); }
.promo-banner img { width: 100%; display: block; }

/* ===== CTA banner ===== */
.cta-banner {
  background: linear-gradient(120deg, var(--orange), var(--orange-dark));
  border-radius: 24px;
  padding: 56px 60px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  margin: 0 auto;
  max-width: var(--container);
  color: var(--white);
}
.cta-banner h2 { font-size: clamp(24px, 3vw, 32px); font-weight: 700; margin-bottom: 8px; }
.cta-banner p { color: rgba(255,255,255,0.9); font-size: 15.5px; }
.cta-banner .btn-outline { border-color: rgba(255,255,255,0.7); }

@media (max-width: 700px) {
  .cta-banner { padding: 40px 28px; text-align: center; justify-content: center; }
}

/* ===== Contact ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
}
.contact-info { display: grid; gap: 18px; align-content: start; }
.contact-card {
  display: flex;
  gap: 16px;
  background: var(--gray-100);
  padding: 20px 22px;
  border-radius: 12px;
  align-items: flex-start;
}
.contact-card .ic {
  width: 44px; height: 44px; flex-shrink: 0;
  border-radius: 10px;
  background: var(--blue-700);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
}
.contact-card h4 { font-size: 14.5px; color: var(--blue-900); margin-bottom: 4px; font-weight: 600; }
.contact-card p, .contact-card a { font-size: 14px; color: var(--gray-700); }

.contact-form {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 34px;
}
.contact-form h3 { color: var(--blue-900); font-size: 20px; margin-bottom: 6px; font-weight: 700; }
.contact-form .hint { font-size: 13.5px; color: var(--gray-500); margin-bottom: 22px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin-bottom: 14px; }
.form-row.full { grid-template-columns: 1fr; }
.contact-form input, .contact-form textarea, .contact-form select {
  width: 100%;
  padding: 13px 16px;
  border-radius: 10px;
  border: 1.5px solid var(--gray-200);
  font-family: inherit;
  font-size: 14px;
  background: var(--white);
  color: var(--gray-900);
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--blue-500);
}
.contact-form textarea { resize: vertical; min-height: 100px; }
.contact-form .btn-blue { width: 100%; margin-top: 6px; }

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
}

/* ===== Footer ===== */
.site-footer {
  background: var(--blue-900);
  color: rgba(255,255,255,0.75);
  padding: 60px 0 26px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}
.footer-brand .logo { color: var(--white); margin-bottom: 14px; }
.footer-brand p { font-size: 13.8px; line-height: 1.8; max-width: 300px; }
.footer-col h4 { color: var(--white); font-size: 15px; margin-bottom: 16px; font-weight: 600; }
.footer-col ul { display: grid; gap: 10px; }
.footer-col a { font-size: 13.8px; transition: color 0.2s; }
.footer-col a:hover { color: var(--orange); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 24px;
  font-size: 13px;
  flex-wrap: wrap;
  gap: 10px;
}

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ===== Back to top ===== */
.back-to-top {
  position: fixed;
  right: 26px; bottom: 26px;
  width: 48px; height: 48px;
  border-radius: 50%;
  background: var(--blue-700);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: all 0.3s ease;
  z-index: 900;
  border: none;
}
.back-to-top.show { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--orange); }

/* ===== reveal animation ===== */
.reveal { opacity: 0; transform: translateY(24px); transition: all 0.7s cubic-bezier(.2,.7,.3,1); }
.reveal.in { opacity: 1; transform: translateY(0); }

/* ===== Product modal ===== */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(9,20,38,0.62);
  backdrop-filter: blur(3px);
  display: flex; align-items: center; justify-content: center;
  z-index: 2000;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s ease;
}
.modal-overlay.open { opacity: 1; pointer-events: auto; }
.modal-box {
  background: var(--white);
  border-radius: 18px;
  max-width: 760px;
  width: 100%;
  max-height: 86vh;
  overflow-y: auto;
  padding: 34px;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.25s ease;
}
.modal-overlay.open .modal-box { transform: scale(1); }
.modal-close {
  position: absolute;
  top: 18px; right: 18px;
  width: 36px; height: 36px;
  border-radius: 50%;
  border: none;
  background: var(--gray-100);
  color: var(--gray-700);
  font-size: 18px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
}
.modal-box .m-grid { display: grid; grid-template-columns: 1fr 1.3fr; gap: 28px; margin-top: 10px; }
.modal-box .m-grid img { border-radius: 12px; background: var(--blue-50); padding: 14px; }
.modal-box h3 { font-size: 22px; color: var(--blue-900); margin-bottom: 4px; font-weight: 700; }
.modal-box .model { color: var(--gray-500); font-size: 13px; margin-bottom: 18px; }
.modal-box .spec-list li { font-size: 13.5px; }
@media (max-width: 640px) {
  .modal-box .m-grid { grid-template-columns: 1fr; }
}

/* ===== misc ===== */
.divider-line { height: 1px; background: var(--gray-200); margin: 0 auto; max-width: var(--container); }
::selection { background: var(--orange); color: white; }