/* ===========================
   RESET & BASE
=========================== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --primary:     #1a6fc4;
  --primary-dark:#0f4f91;
  --accent:      #00b4d8;
  --dark:        #0d1b2a;
  --gray:        #4a5568;
  --light-gray:  #f0f4f8;
  --white:       #ffffff;
  --radius:      10px;
  --shadow:      0 4px 24px rgba(0,0,0,.10);
  --transition:  .3s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--dark);
  background: var(--white);
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===========================
   LAYOUT HELPERS
=========================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 12px;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--gray);
  max-width: 640px;
  margin-bottom: 48px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: none;
  transition: var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(26,111,196,.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,.7);
}
.btn-outline:hover {
  background: rgba(255,255,255,.15);
  border-color: var(--white);
}

/* ===========================
   HEADER / NAV
=========================== */
header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: 0 2px 12px rgba(0,0,0,.08);
}

nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.35rem;
  font-weight: 800;
  color: var(--primary);
}

.logo span { color: var(--accent); }

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links a {
  font-size: .95rem;
  font-weight: 500;
  color: var(--gray);
  transition: var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0;
  width: 0; height: 2px;
  background: var(--primary);
  transition: var(--transition);
}

.nav-links a:hover { color: var(--primary); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: var(--primary);
  color: var(--white) !important;
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 600 !important;
}
.nav-cta:hover { background: var(--primary-dark); }
.nav-cta::after { display: none !important; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 26px;
  height: 3px;
  background: var(--dark);
  border-radius: 3px;
  transition: var(--transition);
}

/* ===========================
   HERO
=========================== */
.hero {
  min-height: 88vh;
  background: linear-gradient(135deg, #0d1b2a 0%, #1a3a5c 50%, #1a6fc4 100%);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 80px 0;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 680px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.12);
  color: var(--accent);
  padding: 6px 16px;
  border-radius: 50px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 24px;
  border: 1px solid rgba(0,180,216,.3);
}

.hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1.2;
  margin-bottom: 20px;
}

.hero h1 span { color: var(--accent); }

.hero p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.82);
  margin-bottom: 36px;
  max-width: 560px;
}

.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

.hero-stats {
  display: flex;
  gap: 40px;
  margin-top: 60px;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  display: block;
}

.stat-label {
  font-size: .85rem;
  color: rgba(255,255,255,.6);
  text-transform: uppercase;
  letter-spacing: .5px;
}

/* ===========================
   SERVICES SECTION
=========================== */
.services {
  padding: 100px 0;
  background: var(--white);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.service-card {
  background: var(--white);
  border: 1px solid #e2e8f0;
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  transform: scaleX(0);
  transform-origin: left;
  transition: var(--transition);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: transparent;
}

.service-card:hover::before { transform: scaleX(1); }

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--dark);
}

.service-card p {
  font-size: .95rem;
  color: var(--gray);
  line-height: 1.6;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--primary);
  transition: var(--transition);
}

.service-link:hover { gap: 10px; }

/* ===========================
   WHY US / FEATURES
=========================== */
.why-us {
  padding: 100px 0;
  background: var(--light-gray);
}

.why-us-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.features-list { display: flex; flex-direction: column; gap: 20px; }

.feature-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  background: var(--white);
  padding: 20px;
  border-radius: var(--radius);
  box-shadow: 0 2px 8px rgba(0,0,0,.05);
  transition: var(--transition);
}

.feature-item:hover { transform: translateX(6px); }

.feature-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
}

.feature-item h4 { font-weight: 700; margin-bottom: 4px; }
.feature-item p { font-size: .92rem; color: var(--gray); }

/* Temperature Table */
.temp-table-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.temp-table-card h3 {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: white;
  padding: 20px 24px;
  font-size: 1.1rem;
}

table {
  width: 100%;
  border-collapse: collapse;
}

th {
  background: var(--light-gray);
  padding: 12px 16px;
  text-align: left;
  font-size: .88rem;
  font-weight: 700;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: .5px;
}

td {
  padding: 14px 16px;
  border-bottom: 1px solid #e2e8f0;
  font-size: .95rem;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: #f7fafc; }

.tag {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .8rem;
  font-weight: 600;
}

.tag-blue { background: #ebf5ff; color: var(--primary); }
.tag-cyan { background: #e0f9ff; color: #0077a8; }
.tag-green { background: #e6fff0; color: #0a7a42; }

/* ===========================
   ARTICLES / BLOG
=========================== */
.articles {
  padding: 100px 0;
  background: var(--white);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(310px, 1fr));
  gap: 28px;
}

.article-card {
  border: 1px solid #e2e8f0;
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.article-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
  border-color: transparent;
}

.article-thumb {
  height: 180px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3rem;
  position: relative;
  overflow: hidden;
}

.article-thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(13,27,42,.5), transparent);
}

.article-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }

.article-tag {
  display: inline-block;
  background: #ebf5ff;
  color: var(--primary);
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .78rem;
  font-weight: 700;
  margin-bottom: 12px;
  text-transform: uppercase;
  letter-spacing: .5px;
}

.article-card h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 10px;
  line-height: 1.45;
}

.article-card p {
  font-size: .9rem;
  color: var(--gray);
  flex: 1;
  margin-bottom: 16px;
}

.read-more {
  font-size: .88rem;
  font-weight: 700;
  color: var(--primary);
  display: flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}

.read-more:hover { gap: 10px; color: var(--primary-dark); }

/* ===========================
   CTA BANNER
=========================== */
.cta-banner {
  padding: 90px 0;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--accent) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.04'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.cta-banner h2 {
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 800;
  color: white;
  margin-bottom: 16px;
  position: relative;
}

.cta-banner p {
  font-size: 1.1rem;
  color: rgba(255,255,255,.82);
  max-width: 560px;
  margin: 0 auto 36px;
  position: relative;
}

.cta-btns {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  position: relative;
}

.btn-white {
  background: white;
  color: var(--primary);
  font-weight: 700;
}
.btn-white:hover {
  background: var(--light-gray);
  transform: translateY(-2px);
}

/* ===========================
   FOOTER
=========================== */
footer {
  background: var(--dark);
  color: rgba(255,255,255,.75);
  padding: 70px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 48px;
  padding-bottom: 50px;
  border-bottom: 1px solid rgba(255,255,255,.1);
}

.footer-brand p {
  font-size: .93rem;
  line-height: 1.75;
  margin-top: 16px;
  color: rgba(255,255,255,.6);
}

.footer-col h4 {
  font-size: 1rem;
  font-weight: 700;
  color: white;
  margin-bottom: 18px;
}

.footer-col ul { display: flex; flex-direction: column; gap: 10px; }

.footer-col ul a {
  font-size: .9rem;
  color: rgba(255,255,255,.6);
  transition: var(--transition);
}

.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }

.footer-contact-item {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: .9rem;
  color: rgba(255,255,255,.6);
  margin-bottom: 12px;
}

.footer-contact-item span:first-child { font-size: 1rem; }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 28px;
  font-size: .88rem;
  color: rgba(255,255,255,.4);
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom a { color: var(--accent); }

/* ===========================
   ARTICLE / PAGE LAYOUT
=========================== */
.page-hero {
  background: linear-gradient(135deg, var(--dark), var(--primary-dark));
  padding: 80px 0 60px;
  color: white;
}

.page-hero .breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .88rem;
  color: rgba(255,255,255,.6);
  margin-bottom: 16px;
}

.page-hero .breadcrumb a { color: var(--accent); }
.page-hero .breadcrumb span { color: rgba(255,255,255,.3); }

.page-hero h1 {
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  line-height: 1.25;
  max-width: 760px;
}

.page-hero p {
  font-size: 1.05rem;
  color: rgba(255,255,255,.75);
  max-width: 640px;
  margin-top: 14px;
}

/* Article body */
.article-page {
  padding: 80px 0;
}

.article-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}

.article-content h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  margin: 36px 0 14px;
  padding-left: 16px;
  border-left: 4px solid var(--primary);
}

.article-content h3 {
  font-size: 1.2rem;
  font-weight: 700;
  margin: 24px 0 10px;
  color: var(--dark);
}

.article-content p {
  font-size: 1rem;
  color: var(--gray);
  line-height: 1.8;
  margin-bottom: 18px;
}

.article-content ul {
  list-style: none;
  margin-bottom: 20px;
}

.article-content ul li {
  padding: 8px 0 8px 20px;
  position: relative;
  color: var(--gray);
  font-size: .97rem;
}

.article-content ul li::before {
  content: '✔';
  position: absolute;
  left: 0;
  color: var(--primary);
  font-size: .8rem;
  top: 10px;
}

.article-content table {
  margin: 24px 0;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,.06);
}

.info-box {
  background: #ebf5ff;
  border-left: 4px solid var(--primary);
  padding: 20px 24px;
  border-radius: 0 8px 8px 0;
  margin: 28px 0;
}

.info-box p { color: var(--primary-dark); margin: 0; font-weight: 500; }

/* Sidebar */
.sidebar { position: sticky; top: 90px; }

.sidebar-card {
  background: var(--white);
  border: 1px solid #e2e8f0;
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 24px;
}

.sidebar-card h4 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--primary);
}

.sidebar-links { display: flex; flex-direction: column; gap: 8px; }

.sidebar-links a {
  font-size: .92rem;
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 0;
  border-bottom: 1px solid #f0f4f8;
  transition: var(--transition);
}

.sidebar-links a:hover { color: var(--primary); padding-left: 6px; }

.contact-cta-box {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
}

.contact-cta-box h4 { color: white; border: none; padding: 0; margin-bottom: 10px; }
.contact-cta-box p { font-size: .9rem; opacity: .9; margin-bottom: 18px; }

.btn-white-sm {
  background: white;
  color: var(--primary);
  padding: 10px 22px;
  border-radius: 50px;
  font-weight: 700;
  font-size: .9rem;
  display: inline-block;
  transition: var(--transition);
}
.btn-white-sm:hover { background: var(--light-gray); }

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 1024px) {
  .why-us-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .article-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 768px) {
  .nav-links { display: none; flex-direction: column; gap: 0; }
  .nav-links.open {
    display: flex;
    position: absolute;
    top: 70px; left: 0;
    width: 100%;
    background: white;
    box-shadow: 0 8px 24px rgba(0,0,0,.1);
    padding: 16px 0;
  }
  .nav-links.open a {
    padding: 12px 24px;
    width: 100%;
    border-bottom: 1px solid var(--light-gray);
  }
  .nav-links.open .nav-cta {
    margin: 12px 24px 0;
    width: calc(100% - 48px);
    text-align: center;
    border-radius: var(--radius);
    padding: 12px;
  }
  .hamburger { display: flex; }
  header { position: relative; }
  .hero-stats { gap: 24px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .articles-grid { grid-template-columns: 1fr; }
  .services-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .hero-btns { flex-direction: column; }
  .cta-btns { flex-direction: column; align-items: center; }
  .hero { padding: 60px 0; }
}

/* ===========================
   ARTICLE IMAGES
=========================== */
.article-img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: block;
  margin: 28px 0;
}

.article-img-caption {
  text-align: center;
  font-size: .85rem;
  color: var(--gray);
  margin-top: -20px;
  margin-bottom: 28px;
  font-style: italic;
}

.img-wide {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  margin: 32px 0 8px;
  display: block;
  overflow: hidden;
  background: var(--light-gray);
}

.img-wide img,
.img-wide svg {
  width: 100%;
  height: auto;
  display: block;
}

.img-half-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin: 28px 0;
}

.img-half-grid figure {
  margin: 0;
}

.img-half-grid img,
.img-half-grid .article-img {
  margin: 0 0 8px;
}

figure {
  margin: 32px 0;
}

figure figcaption {
  font-size: .85rem;
  color: var(--gray);
  text-align: center;
  margin-top: 8px;
  font-style: italic;
  line-height: 1.5;
}

/* Hero image panel */
.hero-img-panel {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.hero-img-panel img,
.hero-img-panel svg {
  max-width: 480px;
  width: 100%;
  border-radius: 16px;
  filter: drop-shadow(0 20px 40px rgba(0,0,0,.4));
}

.hero-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

/* Page hero with image */
.page-hero-layout {
  display: grid;
  grid-template-columns: 1fr 420px;
  gap: 40px;
  align-items: center;
}

.page-hero-img {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,.3);
}

.page-hero-img img,
.page-hero-img svg {
  width: 100%;
  height: auto;
  display: block;
}

/* Inline image float */
.img-float-right {
  float: right;
  width: 45%;
  margin: 0 0 20px 28px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.img-float-right img,
.img-float-right svg {
  width: 100%;
  height: auto;
  display: block;
}

.clearfix::after {
  content: '';
  display: table;
  clear: both;
}

/* Schematic / diagram block */
.diagram-block {
  background: var(--light-gray);
  border-radius: var(--radius);
  padding: 8px;
  margin: 32px 0;
  border: 1px solid #e2e8f0;
}

.diagram-block svg,
.diagram-block img {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 8px;
}

.diagram-block figcaption {
  text-align: center;
  font-size: .85rem;
  color: var(--gray);
  margin-top: 10px;
  font-style: italic;
}

/* Responsive images */
@media (max-width: 768px) {
  .hero-layout { grid-template-columns: 1fr; }
  .hero-img-panel { display: none; }
  .page-hero-layout { grid-template-columns: 1fr; }
  .page-hero-img { display: none; }
  .img-half-grid { grid-template-columns: 1fr; }
  .img-float-right { float: none; width: 100%; margin: 20px 0; }
}