/* ===========================================================
   Shaanxi Feinuotai Metal Material Co., Ltd.
   Global Stylesheet
   Industrial, clean, professional design
   =========================================================== */

/* ---------- Reset & Base ---------- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

:root {
  --color-primary: #1a3a5c;       /* deep industrial blue */
  --color-primary-dark: #0f2440;
  --color-primary-light: #2a5885;
  --color-accent: #c8973a;         /* warm gold accent */
  --color-accent-dark: #a57a29;
  --color-bg: #ffffff;
  --color-bg-alt: #f4f6f8;
  --color-text: #222831;
  --color-text-muted: #5a6470;
  --color-border: #dfe4ea;
  --font-heading: 'Montserrat', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --font-body: 'Open Sans', 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
  --container-max: 1200px;
  --shadow-sm: 0 2px 6px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 36px rgba(0,0,0,0.12);
  --transition: 0.25s ease;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover {
  color: var(--color-accent);
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary-dark);
  margin-bottom: 0.6em;
}

h1 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2.1rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }

p { margin-bottom: 1rem; color: var(--color-text-muted); }

ul { list-style: none; }

.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 1.25rem;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.85rem 1.75rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  border-radius: 3px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition);
  background: var(--color-primary);
  color: #fff;
}
.btn:hover {
  background: var(--color-primary-dark);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-accent:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
}
.btn-outline {
  background: transparent;
  border-color: var(--color-primary);
  color: var(--color-primary);
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
}

/* ---------- Header / Nav ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.05rem;
  line-height: 1.2;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 0.6rem;
}
.logo-mark {
  width: 36px;
  height: 36px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.95rem;
  border-radius: 3px;
}
.logo-text-small {
  display: block;
  font-size: 0.72rem;
  font-weight: 500;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Main Nav (desktop) */
.main-nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.main-nav > li {
  position: relative;
}
.main-nav > li > a {
  display: block;
  padding: 0.6rem 1rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  color: var(--color-primary-dark);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.main-nav > li > a:hover,
.main-nav > li > a.active {
  color: var(--color-accent);
}

/* Dropdown */
.has-dropdown > a::after {
  content: '▾';
  margin-left: 4px;
  font-size: 0.75rem;
}
.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 260px;
  background: #fff;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-primary);
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all var(--transition);
  padding: 0.5rem 0;
}
.has-dropdown:hover > .dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.dropdown li a {
  display: block;
  padding: 0.55rem 1.1rem;
  font-size: 0.88rem;
  color: var(--color-text);
  font-weight: 500;
}
.dropdown li a:hover {
  background: var(--color-bg-alt);
  color: var(--color-primary);
}
.dropdown .dropdown-heading {
  padding: 0.7rem 1.1rem 0.35rem;
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

/* Mobile menu button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  padding: 0.5rem;
  cursor: pointer;
}
.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-primary);
  margin: 5px 0;
  transition: all var(--transition);
}
.mobile-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}
.mobile-toggle.active span:nth-child(2) {
  opacity: 0;
}
.mobile-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  background: var(--color-primary-dark);
  color: #fff;
  padding: 5rem 0;
  overflow: hidden;
}
/* Hero background image with dark overlay */
.home-hero-bg {
  background-image: linear-gradient(135deg, rgba(15,36,64,0.88) 0%, rgba(26,58,92,0.82) 55%, rgba(42,88,133,0.75) 100%), url('../images/hero-industrial.jpg');
  background-size: cover;
  background-position: center center;
  background-attachment: fixed;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(200,151,58,0.18) 0, transparent 40%),
    radial-gradient(circle at 85% 70%, rgba(255,255,255,0.08) 0, transparent 40%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  z-index: 1;
  max-width: 780px;
}
.hero-tag {
  display: inline-block;
  padding: 0.35rem 0.9rem;
  background: rgba(200,151,58,0.2);
  border: 1px solid rgba(200,151,58,0.5);
  color: #f3c56a;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: 2px;
  margin-bottom: 1.25rem;
}
.hero h1 {
  color: #fff;
  font-weight: 800;
  margin-bottom: 1rem;
}
.hero-lead {
  font-size: 1.1rem;
  color: rgba(255,255,255,0.85);
  margin-bottom: 2rem;
}
.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.85rem;
}
.hero .btn-outline {
  border-color: #fff;
  color: #fff;
}
.hero .btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
}

/* ---------- Section common ---------- */
.section {
  padding: 4.5rem 0;
}
.section-alt {
  background: var(--color-bg-alt);
}
.section-header {
  text-align: center;
  margin-bottom: 3rem;
}
.section-header h2 {
  position: relative;
  display: inline-block;
  padding-bottom: 0.8rem;
}
.section-header h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--color-accent);
}
.section-header p {
  max-width: 680px;
  margin: 1rem auto 0;
}

/* ---------- Product Categories Grid ---------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.product-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary);
}
.product-card-media {
  height: 180px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.35);
  font-size: 3.5rem;
  font-weight: 800;
  font-family: var(--font-heading);
  letter-spacing: -0.02em;
  overflow: hidden;
  position: relative;
}
.product-card-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.product-card-body {
  padding: 1.25rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.product-card h3 {
  font-size: 1.05rem;
  margin-bottom: 0.4rem;
}
.product-card p {
  font-size: 0.9rem;
  margin-bottom: 1rem;
}
.product-card .card-link {
  margin-top: auto;
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}
.product-card .card-link::after {
  content: '→';
  transition: transform var(--transition);
}
.product-card:hover .card-link::after {
  transform: translateX(4px);
}

/* ---------- Manufacturing Capabilities ---------- */
.capabilities-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem;
  margin-top: 2rem;
}
.capability-item {
  display: flex;
  gap: 1.25rem;
  padding: 1.75rem;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  transition: all var(--transition);
}
.capability-item:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-sm);
}
.capability-icon {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: #fff;
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  font-weight: 700;
  font-family: var(--font-heading);
}
.capability-content h3 {
  font-size: 1.1rem;
  margin-bottom: 0.3rem;
}
.capability-content p {
  font-size: 0.92rem;
  margin-bottom: 0;
}

/* ---------- CTA / Inquiry Band ---------- */
.inquiry-band {
  background: var(--color-primary-dark);
  color: #fff;
  padding: 3.5rem 0;
  text-align: center;
}
.inquiry-band h2 {
  color: #fff;
  margin-bottom: 0.7rem;
}
.inquiry-band p {
  color: rgba(255,255,255,0.8);
  max-width: 640px;
  margin: 0 auto 1.75rem;
}

/* ---------- Page Hero (for inner pages) ---------- */
.page-hero {
  background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
  color: #fff;
  padding: 3.25rem 0;
}
.page-hero h1 {
  color: #fff;
  margin-bottom: 0.4rem;
}
.breadcrumbs {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.7);
}
.breadcrumbs a {
  color: rgba(255,255,255,0.9);
}
.breadcrumbs a:hover {
  color: var(--color-accent);
}

/* ---------- Forms ---------- */
.form-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}
.form-group {
  margin-bottom: 1rem;
}
.form-group label {
  display: block;
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  margin-bottom: 0.35rem;
  letter-spacing: 0.02em;
}
.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 0.9rem;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--color-text);
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 3px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26,58,92,0.12);
}
.form-group textarea {
  resize: vertical;
  min-height: 140px;
}
.form-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 0.5rem;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-primary-dark);
  color: rgba(255,255,255,0.75);
  padding-top: 3.5rem;
  font-size: 0.9rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 2.5rem;
  padding-bottom: 2.5rem;
}
.footer-col h4 {
  color: #fff;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 1rem;
}
.footer-col p,
.footer-col li {
  margin-bottom: 0.45rem;
}
.footer-col a {
  color: rgba(255,255,255,0.75);
}
.footer-col a:hover {
  color: var(--color-accent);
}
.footer-placeholder {
  display: inline-block;
  padding: 0.15rem 0.45rem;
  background: rgba(200,151,58,0.2);
  color: #f3c56a;
  border: 1px dashed rgba(200,151,58,0.6);
  border-radius: 2px;
  font-size: 0.82rem;
  font-style: italic;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding: 1.25rem 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.55);
}

/* ---------- Placeholder badge for unfinished content ---------- */
.placeholder-badge {
  display: inline-block;
  padding: 0.2rem 0.6rem;
  background: #fff3cd;
  border: 1px solid #f0c36d;
  color: #856404;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  border-radius: 2px;
}

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  .main-nav {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background: #fff;
    border-top: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
    padding: 1rem 0;
    gap: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
  }
  .main-nav.open {
    max-height: 1200px;
  }
  .main-nav > li > a {
    padding: 0.85rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
  }
  .dropdown {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    padding: 0;
    display: none;
  }
  .has-dropdown.open > .dropdown {
    display: block;
  }
  .dropdown li a {
    padding: 0.6rem 1.5rem 0.6rem 2.2rem;
    font-size: 0.85rem;
  }

  .hero {
    padding: 3.5rem 0;
  }
  .product-grid {
    grid-template-columns: 1fr;
  }
  .capabilities-grid {
    grid-template-columns: 1fr;
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .section {
    padding: 3rem 0;
  }
}

@media (max-width: 480px) {
  .hero-buttons {
    flex-direction: column;
    align-items: stretch;
  }
  .hero-buttons .btn {
    width: 100%;
    text-align: center;
  }
}

/* ---------- Utility ---------- */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }