/* =========================================================
   NanJing TianYu Machinery Co., Ltd. - Global Stylesheet
   Palette: Navy #1a3a5c / Orange #e87722 / Light gray #f5f7fa
   ========================================================= */

:root {
  --navy: #1a3a5c;
  --navy-dark: #122a44;
  --navy-light: #2a5480;
  --orange: #e87722;
  --orange-dark: #c8601a;
  --light: #f5f7fa;
  --gray: #6b7280;
  --dark: #333333;
  --white: #ffffff;
  --border: #e2e8f0;
  --shadow: 0 2px 12px rgba(26, 58, 92, 0.08);
  --shadow-hover: 0 6px 24px rgba(26, 58, 92, 0.15);
  --radius: 6px;
  --container: 1200px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Inter', 'Noto Sans Devanagari', 'Noto Sans Thai', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  color: var(--dark);
  line-height: 1.7;
  background: var(--white);
  font-size: 16px;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--navy); text-decoration: none; transition: color .2s; }
a:hover { color: var(--orange); }
ul { list-style: none; }

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

h1, h2, h3, h4 { color: var(--navy); line-height: 1.3; font-weight: 700; }
h1 { font-size: 2.4rem; }
h2 { font-size: 1.8rem; margin-bottom: 16px; }
h3 { font-size: 1.25rem; margin-bottom: 10px; }

.section { padding: 72px 0; }
.section-alt { background: var(--light); }
.section-title { text-align: center; margin-bottom: 48px; }
.section-title p { color: var(--gray); max-width: 680px; margin: 12px auto 0; }

/* ===== Buttons ===== */
.btn {
  display: inline-block;
  padding: 13px 32px;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 15px;
  transition: all .25s;
  cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary { background: var(--orange); color: var(--white); }
.btn-primary:hover { background: var(--orange-dark); color: var(--white); transform: translateY(-1px); }
.btn-outline { background: transparent; color: var(--white); border-color: var(--white); }
.btn-outline:hover { background: var(--white); color: var(--navy); }
.btn-navy { background: var(--navy); color: var(--white); }
.btn-navy:hover { background: var(--navy-dark); color: var(--white); }

/* ===== Top Bar ===== */
.topbar {
  background: var(--navy-dark);
  color: #cdd9e5;
  font-size: 13px;
  padding: 8px 0;
}
.topbar .container { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 8px; }
.topbar a { color: #cdd9e5; }
.topbar a:hover { color: var(--orange); }
.topbar-contact span { margin-right: 20px; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--white);
  box-shadow: 0 1px 0 var(--border);
}
.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo { display: flex; align-items: center; gap: 10px; }
.logo img { height: 44px; width: auto; }
.logo-text { font-weight: 800; color: var(--navy); font-size: 1.1rem; line-height: 1.1; }
.logo-text small { display: block; font-size: .7rem; color: var(--orange); font-weight: 600; letter-spacing: .5px; }

.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav > ul { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  padding: 10px 14px;
  font-weight: 500;
  font-size: 15px;
  color: var(--dark);
  border-radius: var(--radius);
}
.main-nav a:hover, .main-nav a.active { color: var(--orange); background: var(--light); }

/* Language switcher */
.lang-switcher { position: relative; margin-left: 12px; }
.lang-btn {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--white);
  cursor: pointer;
  font-weight: 600;
  color: var(--navy);
  font-size: 14px;
}
.lang-btn:hover { border-color: var(--orange); color: var(--orange); }
.lang-menu {
  display: none;
  position: absolute;
  right: 0;
  top: calc(100% + 6px);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  min-width: 160px;
  overflow: hidden;
}
.lang-menu.open { display: block; }
.lang-menu a {
  display: block;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--dark);
  border-bottom: 1px solid var(--border);
}
.lang-menu a:last-child { border-bottom: none; }
.lang-menu a:hover, .lang-menu a.active { background: var(--light); color: var(--orange); }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.hamburger span { width: 24px; height: 2px; background: var(--navy); transition: .3s; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(135deg, rgba(18,42,68,.88) 0%, rgba(26,58,92,.78) 100%), url('../images/hero.jpg') center/cover no-repeat;
  color: var(--white);
  padding: 120px 0;
  text-align: center;
}
.hero h1 { color: var(--white); font-size: 2.6rem; max-width: 900px; margin: 0 auto 20px; }
.hero p.lead { font-size: 1.15rem; max-width: 720px; margin: 0 auto 32px; color: #d8e2ec; }
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== Breadcrumb ===== */
.breadcrumb-bar {
  background: var(--light);
  padding: 14px 0;
  font-size: 14px;
  color: var(--gray);
}
.breadcrumb-bar a { color: var(--navy); }
.breadcrumb-bar span.sep { margin: 0 8px; color: #cbd5e0; }

/* ===== Brand cards ===== */
.brand-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 24px;
}
.brand-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  transition: all .25s;
}
.brand-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--orange); }
.brand-card .brand-logo {
  width: 64px; height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--navy);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  font-weight: 800; font-size: 1.3rem;
}
.brand-card h3 { margin-bottom: 8px; }
.brand-card p { font-size: 14px; color: var(--gray); margin-bottom: 14px; }
.brand-card .link { color: var(--orange); font-weight: 600; font-size: 14px; }

/* ===== Category grid ===== */
.cat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px;
}
.cat-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all .25s;
}
.cat-card:hover { border-color: var(--navy); box-shadow: var(--shadow); }
.cat-card .cat-icon {
  width: 44px; height: 44px;
  background: var(--light);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 14px;
  color: var(--navy);
  font-size: 22px;
  font-weight: 700;
}
.cat-card h3 { font-size: 1.05rem; }
.cat-card p { font-size: 14px; color: var(--gray); }

/* ===== Features ===== */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 28px;
}
.feature {
  padding: 28px;
  background: var(--white);
  border-radius: var(--radius);
  border-top: 3px solid var(--orange);
}
.feature .f-icon {
  font-size: 32px;
  color: var(--navy);
  margin-bottom: 14px;
  font-weight: 800;
}
.feature h3 { font-size: 1.1rem; }
.feature p { font-size: 14.5px; color: var(--gray); }

/* ===== Stats ===== */
.stats-bar {
  background: var(--navy);
  color: var(--white);
  padding: 56px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 32px;
  text-align: center;
}
.stat-num { font-size: 2.6rem; font-weight: 800; color: var(--orange); line-height: 1; }
.stat-label { margin-top: 8px; font-size: .95rem; color: #cdd9e5; }

/* ===== CTA banner ===== */
.cta-banner {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 64px 0;
  text-align: center;
}
.cta-banner h2 { color: var(--white); margin-bottom: 12px; }
.cta-banner p { color: #cdd9e5; max-width: 640px; margin: 0 auto 28px; }

/* ===== News ===== */
.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}
.news-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .25s;
}
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.news-card .news-body { padding: 24px; }
.news-card .news-date { font-size: 13px; color: var(--orange); font-weight: 600; margin-bottom: 8px; }
.news-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.news-card p { font-size: 14.5px; color: var(--gray); margin-bottom: 14px; }
.news-card .link { color: var(--navy); font-weight: 600; font-size: 14px; }

/* ===== Page header ===== */
.page-header {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-light) 100%);
  color: var(--white);
  padding: 64px 0;
  text-align: center;
}
.page-header h1 { color: var(--white); margin-bottom: 10px; }
.page-header p { color: #cdd9e5; max-width: 720px; margin: 0 auto; }

/* ===== Tables ===== */
.table-wrap { overflow-x: auto; }
table.spec-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
table.spec-table th, table.spec-table td {
  padding: 13px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
}
table.spec-table th {
  background: var(--navy);
  color: var(--white);
  font-weight: 600;
}
table.spec-table tr:hover td { background: var(--light); }

/* ===== Two column ===== */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.two-col img { border-radius: var(--radius); box-shadow: var(--shadow); }

/* ===== Lists ===== */
.check-list li {
  padding: 8px 0 8px 32px;
  position: relative;
}
.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 8px;
  color: var(--orange);
  font-weight: 800;
}

/* ===== Forms ===== */
.form-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px;
  box-shadow: var(--shadow);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-bottom: 18px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-weight: 600; margin-bottom: 6px; font-size: 14px; color: var(--navy); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: inherit;
  background: var(--white);
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--orange);
  box-shadow: 0 0 0 3px rgba(232,119,34,.15);
}
.form-group textarea { min-height: 140px; resize: vertical; }

/* ===== Contact info ===== */
.contact-info-box {
  background: var(--navy);
  color: var(--white);
  padding: 36px;
  border-radius: var(--radius);
}
.contact-info-box h3 { color: var(--white); margin-bottom: 20px; }
.contact-info-box .info-row {
  display: flex;
  gap: 14px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255,255,255,.1);
  font-size: 14.5px;
}
.contact-info-box .info-row:last-child { border-bottom: none; }
.contact-info-box .info-row .icon { color: var(--orange); font-weight: 700; min-width: 24px; }

/* ===== Footer ===== */
.site-footer {
  background: var(--navy-dark);
  color: #b8c6d6;
  padding: 64px 0 0;
  font-size: 14.5px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-grid h4 { color: var(--white); font-size: 1rem; margin-bottom: 18px; }
.footer-grid ul li { margin-bottom: 10px; }
.footer-grid a { color: #b8c6d6; }
.footer-grid a:hover { color: var(--orange); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: #8a9bb0;
}
.footer-logo img { height: 40px; margin-bottom: 14px; filter: brightness(0) invert(1); }

/* ===== Product detail sections ===== */
.part-cat {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 24px;
}
.part-cat h3 { border-left: 4px solid var(--orange); padding-left: 12px; }
.part-cat ul { margin-top: 12px; }
.part-cat ul li { padding: 4px 0 4px 20px; position: relative; font-size: 14.5px; }
.part-cat ul li::before { content: "•"; position: absolute; left: 4px; color: var(--orange); font-weight: 700; }

/* ===== Catalog ===== */
.catalog-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
}
.badge-soon {
  display: inline-block;
  background: var(--orange);
  color: var(--white);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  margin-top: 10px;
}

/* ===== Language notice ===== */
.lang-notice {
  background: #fff8e6;
  border: 1px solid #f0d98c;
  border-radius: var(--radius);
  padding: 18px 22px;
  margin: 24px 0;
  font-size: 14.5px;
}

/* ===== Map placeholder ===== */
.map-placeholder {
  background: var(--light);
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  height: 320px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray);
  font-size: 15px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .two-col { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  h1 { font-size: 1.9rem; }
  .hero { padding: 80px 0; }
  .hero h1 { font-size: 1.9rem; }
  .section { padding: 48px 0; }

  .hamburger { display: flex; }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    box-shadow: var(--shadow-hover);
    display: none;
  }
  .main-nav.open { display: flex; }
  .main-nav > ul { flex-direction: column; align-items: stretch; }
  .main-nav a { display: block; }
  .lang-switcher { margin: 12px 0 0; }
  .lang-menu { position: static; display: none; margin-top: 8px; }
  .lang-menu.open { display: block; }

  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .topbar .container { flex-direction: column; text-align: center; }
  .topbar-contact span { display: block; margin: 2px 0; }
}