/* ============================================
   ZhongKe Fastener - Professional Website
   ============================================ */

:root {
  --blue-dark: #060e1a;
  --blue: #0d1f3c;
  --blue-mid: #15315e;
  --orange: #f48120;
  --orange-light: #f9a03f;
  --orange-glow: #fcc88c;
  --gold: #d4a017;
  --steel: #94a3b8;
  --white: #ffffff;
  --gray-50: #f5f6f8;
  --gray-100: #e7e9ee;
  --gray-200: #c7ccd6;
  --gray-300: #939bb0;
  --gray-500: #6b738a;
  --gray-600: #50576b;
  --gray-800: #232836;
  --gray-900: #13161f;
  --green: #0ea95a;
  --shadow-sm: 0 1px 3px rgba(6,14,26,0.06);
  --shadow: 0 4px 20px rgba(6,14,26,0.10);
  --shadow-lg: 0 16px 48px rgba(6,14,26,0.14);
  --shadow-orange: 0 4px 24px rgba(244,129,32,0.28);
  --radius: 6px;
  --radius-lg: 12px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Inter', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  color: var(--gray-800);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
img { max-width: 100%; display: block; }
h1, h2, h3, h4 { font-weight: 800; line-height: 1.2; color: var(--blue-dark); }
h1 { font-size: clamp(2.4rem, 4.5vw, 3.6rem); letter-spacing: -0.02em; }
h2 { font-size: clamp(1.7rem, 3.2vw, 2.4rem); letter-spacing: -0.01em; }
h3 { font-size: 1.2rem; }

.section-title { text-align: center; margin-bottom: 3.5rem; }
.section-title h2 { display: inline-block; padding-bottom: 0.75rem; position: relative; }
.section-title h2::after {
  content: '';
  position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
  width: 56px; height: 3px; background: var(--orange); border-radius: 2px;
}
.section-title p { color: var(--gray-500); margin-top: 0.75rem; font-size: 1.05rem; }
.container { max-width: 1240px; margin: 0 auto; padding: 0 1.5rem; }

/* --- Buttons --- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.85rem 2.2rem; border-radius: var(--radius);
  font-weight: 700; font-size: 0.95rem; transition: all var(--transition);
  cursor: pointer; border: none; text-align: center; letter-spacing: 0.01em;
}
.btn-primary { background: var(--orange); color: var(--white); box-shadow: var(--shadow-orange); }
.btn-primary:hover { background: #e0730e; transform: translateY(-2px); box-shadow: 0 8px 32px rgba(244,129,32,0.40); }
.btn-outline { background: transparent; color: var(--white); border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { background: var(--white); color: var(--blue-dark); border-color: var(--white); }
.btn-white { background: var(--white); color: var(--blue-dark); font-weight: 700; }
.btn-white:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

/* ============================================
   NAVIGATION
   ============================================ */
.navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(6,14,26,0.96); backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255,255,255,0.05); transition: all var(--transition);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.nav-logo { display: flex; align-items: center; gap: 0.6rem; font-size: 1.35rem; font-weight: 800; color: var(--white); }
.nav-logo svg { width: 38px; height: 38px; }
.nav-links { display: flex; align-items: center; gap: 2.4rem; }
.nav-links a { color: var(--gray-300); font-weight: 500; font-size: 0.94rem; transition: color var(--transition); position: relative; }
.nav-links a::after { content: ''; position: absolute; bottom: -5px; left: 0; width: 0; height: 2px; background: var(--orange); border-radius: 1px; transition: width var(--transition); }
.nav-links a:hover, .nav-links a.active { color: var(--white); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }
.nav-cta .btn { padding: 0.55rem 1.5rem; font-size: 0.88rem; }
.mobile-toggle { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 6px; background: none; border: none; }
.mobile-toggle span { display: block; width: 28px; height: 2.5px; background: var(--white); border-radius: 3px; transition: all var(--transition); }

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative; min-height: 100vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--blue-dark) 0%, #0a1730 40%, var(--blue) 100%);
  overflow: hidden;
}
.hero-bg-pattern {
  position: absolute; inset: 0; opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 2l8 14 16 4-12 10 2 16-14-8-14 8 2-16-12-10 16-4z' fill='%23ffffff'/%3E%3C/svg%3E");
  background-size: 60px 60px;
}
.hero-glow-1, .hero-glow-2 {
  position: absolute; border-radius: 50%; filter: blur(100px);
}
.hero-glow-1 { top: -30%; right: -15%; width: 700px; height: 700px; background: rgba(244,129,32,0.12); }
.hero-glow-2 { bottom: -25%; left: -10%; width: 500px; height: 500px; background: rgba(212,160,23,0.08); }
.hero .container { position: relative; z-index: 1; display: grid; grid-template-columns: 1fr 1fr; gap: 4rem; align-items: center; padding-top: 70px; }
.hero-content { padding-right: 1rem; }
.hero-badge { display: inline-block; background: rgba(244,129,32,0.14); color: var(--orange-light); padding: 0.4rem 1.2rem; border-radius: 50px; font-size: 0.84rem; font-weight: 600; margin-bottom: 1.5rem; border: 1px solid rgba(244,129,32,0.25); }
.hero h1 { color: var(--white); margin-bottom: 1.25rem; }
.hero h1 span { color: var(--orange); }
.hero p { color: rgba(255,255,255,0.65); font-size: 1.1rem; max-width: 480px; margin-bottom: 2rem; line-height: 1.7; }
.hero-buttons { display: flex; gap: 1rem; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 3rem; margin-top: 3rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.08); }
.hero-stat h3 { color: var(--orange); font-size: 2rem; font-weight: 800; }
.hero-stat p { color: rgba(255,255,255,0.5); font-size: 0.84rem; margin: 0; }
.hero-visual { display: flex; justify-content: center; align-items: center; }
.hero-prod-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.hero-prod-card {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg); padding: 1.8rem 1.4rem; text-align: center;
  backdrop-filter: blur(12px); transition: all var(--transition);
}
.hero-prod-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); border-color: rgba(244,129,32,0.3); }
.hero-prod-card svg { width: 40px; height: 40px; margin-bottom: 0.75rem; color: var(--orange); }
.hero-prod-card h4 { color: var(--white); font-size: 0.94rem; font-weight: 600; margin-bottom: 0.2rem; }
.hero-prod-card p { color: rgba(255,255,255,0.4); font-size: 0.78rem; margin: 0; }

/* ============================================
   SECTION: About
   ============================================ */
.about { padding: 6rem 0; background: var(--white); }
.about-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 5rem; align-items: center; }
.about-visual { position: relative; }
.about-visual-box {
  background: linear-gradient(135deg, var(--blue-mid), var(--blue-dark));
  border-radius: var(--radius-lg); height: 380px; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.about-visual-box::after {
  content: ''; position: absolute;
  top: 16px; left: 16px; right: -16px; bottom: -16px;
  border: 2.5px solid var(--orange); border-radius: var(--radius-lg); z-index: -1;
}
.about-visual-box .visual-icon {
  position: relative; z-index: 1; color: rgba(244,129,32,0.5);
}
.about-visual-box .visual-icon svg { width: 100px; height: 100px; }
.about-stats-row { display: flex; gap: 2rem; margin-top: 1.5rem; }
.about-stat-mini { text-align: center; }
.about-stat-mini .stat-num { font-size: 1.6rem; font-weight: 800; color: var(--orange); }
.about-stat-mini .stat-label { font-size: 0.8rem; color: var(--gray-500); }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 1.2rem; margin-top: 2rem; }
.about-feat { display: flex; align-items: flex-start; gap: 0.8rem; padding: 0.8rem; border-radius: var(--radius); transition: background var(--transition); }
.about-feat:hover { background: var(--gray-50); }
.about-feat .feat-icon {
  flex-shrink: 0; width: 44px; height: 44px; background: rgba(244,129,32,0.08);
  border-radius: var(--radius); display: flex; align-items: center; justify-content: center;
  border: 1.5px solid rgba(244,129,32,0.12);
}
.about-feat .feat-icon svg { width: 22px; height: 22px; color: var(--orange); }
.about-feat h4 { font-size: 0.94rem; margin-bottom: 0.15rem; }
.about-feat p { font-size: 0.84rem; color: var(--gray-500); }

/* ============================================
   SECTION: Products Preview
   ============================================ */
.products { padding: 6rem 0; background: var(--gray-50); }
.product-categories { display: grid; grid-template-columns: repeat(6, 1fr); gap: 1rem; margin-bottom: 3rem; }
.cat-card {
  background: var(--white); border-radius: var(--radius-lg); padding: 1.8rem 0.8rem;
  text-align: center; box-shadow: var(--shadow-sm); border: 2px solid transparent;
  transition: all var(--transition); cursor: pointer;
}
.cat-card:hover { transform: translateY(-5px); box-shadow: var(--shadow); border-color: var(--orange); }
.cat-card.active { border-color: var(--orange); background: #fef9f4; box-shadow: 0 0 0 4px rgba(244,129,32,0.08); }
.cat-icon { margin-bottom: 0.8rem; display: flex; justify-content: center; }
.cat-icon svg { width: 44px; height: 44px; }
.cat-card.active .cat-icon svg { color: var(--orange); }
.cat-card h3 { font-size: 0.95rem; margin-bottom: 0.2rem; }
.cat-card p { font-size: 0.78rem; color: var(--gray-500); }

.product-table-wrapper {
  background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow);
  overflow: hidden; border: 1px solid var(--gray-100);
}
.product-table-header { background: var(--blue-dark); color: var(--white); padding: 1.25rem 2rem; display: flex; align-items: center; justify-content: space-between; }
.product-table-header h3 { color: var(--white); font-size: 1.1rem; }
.product-count { font-size: 0.84rem; color: var(--orange-light); background: rgba(244,129,32,0.15); padding: 0.3rem 0.8rem; border-radius: 50px; }
.product-table { width: 100%; border-collapse: collapse; }
.product-table thead th { background: var(--gray-50); padding: 0.9rem 1.25rem; text-align: left; font-size: 0.78rem; font-weight: 700; color: var(--gray-500); text-transform: uppercase; letter-spacing: 0.06em; border-bottom: 2px solid var(--gray-200); }
.product-table tbody td { padding: 0.95rem 1.25rem; font-size: 0.88rem; border-bottom: 1px solid var(--gray-100); }
.product-table tbody tr:hover { background: #fafbfc; }
.spec-tag { display: inline-block; background: var(--gray-50); padding: 0.2rem 0.6rem; border-radius: 4px; font-size: 0.78rem; margin: 0.12rem; font-weight: 500; color: var(--gray-600); border: 1px solid var(--gray-100); }
.grade-tag { display: inline-block; background: rgba(14,169,90,0.08); color: #0a7a40; padding: 0.22rem 0.65rem; border-radius: 4px; font-size: 0.8rem; font-weight: 700; }
.inquiry-link { color: var(--orange); font-weight: 600; font-size: 0.84rem; white-space: nowrap; }
.inquiry-link:hover { text-decoration: underline; }

/* ============================================
   SECTION: Production Process (NEW)
   ============================================ */
.process { padding: 6rem 0; background: var(--white); }
.process-steps {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 1rem;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute; top: 44px; left: 10%; right: 10%; height: 2px;
  background: linear-gradient(90deg, var(--gray-200), var(--orange), var(--gray-200));
  z-index: 0;
}
.process-step {
  text-align: center; position: relative; z-index: 1;
}
.process-step .step-circle {
  width: 88px; height: 88px; margin: 0 auto 1rem;
  background: var(--white); border: 2.5px solid var(--gray-200);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.process-step:hover .step-circle { border-color: var(--orange); background: #fef9f4; transform: scale(1.05); }
.process-step .step-circle svg { width: 38px; height: 38px; color: var(--gray-500); transition: color var(--transition); }
.process-step:hover .step-circle svg { color: var(--orange); }
.process-step .step-num {
  font-size: 0.75rem; font-weight: 800; color: var(--orange);
  background: rgba(244,129,32,0.1); padding: 0.15rem 0.5rem; border-radius: 20px;
  display: inline-block; margin-bottom: 0.5rem;
}
.process-step h4 { font-size: 0.94rem; margin-bottom: 0.25rem; }
.process-step p { font-size: 0.8rem; color: var(--gray-500); }

/* ============================================
   SECTION: Material Grade Table (NEW)
   ============================================ */
.material-ref { padding: 6rem 0; background: var(--gray-50); }
.grade-table-wrapper {
  background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow);
  overflow: hidden;
}
.grade-table { width: 100%; border-collapse: collapse; }
.grade-table thead th {
  background: var(--blue-dark); color: var(--white); padding: 1rem 1.25rem;
  text-align: left; font-size: 0.82rem; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em;
}
.grade-table thead th:first-child { border-radius: var(--radius-lg) 0 0 0; }
.grade-table thead th:last-child { border-radius: 0 var(--radius-lg) 0 0; }
.grade-table tbody td { padding: 0.9rem 1.25rem; font-size: 0.88rem; border-bottom: 1px solid var(--gray-100); }
.grade-table tbody tr:hover { background: #fafbfc; }
.grade-highlight { color: var(--orange); font-weight: 700; }

/* ============================================
   SECTION: FAQ (NEW)
   ============================================ */
.faq { padding: 6rem 0; background: var(--white); }
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--gray-100); border-radius: var(--radius);
  margin-bottom: 0.75rem; overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--gray-200); }
.faq-item.open { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(244,129,32,0.06); }
.faq-question {
  width: 100%; display: flex; align-items: center; justify-content: space-between;
  padding: 1.2rem 1.5rem; background: none; border: none;
  cursor: pointer; font-size: 1rem; font-weight: 600; color: var(--blue-dark);
  text-align: left; font-family: inherit;
}
.faq-question .faq-arrow {
  flex-shrink: 0; width: 24px; height: 24px; transition: transform var(--transition);
  color: var(--gray-500);
}
.faq-item.open .faq-question .faq-arrow { transform: rotate(180deg); color: var(--orange); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-item.open .faq-answer { max-height: 300px; }
.faq-answer p { padding: 0 1.5rem 1.2rem; font-size: 0.9rem; color: var(--gray-600); line-height: 1.7; }

/* ============================================
   SECTION: Catalog Download (NEW)
   ============================================ */
.catalog-cta {
  padding: 5rem 0; background: linear-gradient(135deg, var(--blue-dark), var(--blue-mid));
  text-align: center; position: relative; overflow: hidden;
}
.catalog-cta::before {
  content: ''; position: absolute; top: -50%; left: -20%;
  width: 600px; height: 600px; border-radius: 50%;
  background: rgba(244,129,32,0.08); filter: blur(80px);
}
.catalog-cta .container { position: relative; z-index: 1; }
.catalog-cta h2 { color: var(--white); margin-bottom: 0.75rem; }
.catalog-cta p { color: rgba(255,255,255,0.6); font-size: 1.05rem; margin-bottom: 2rem; }
.catalog-features { display: flex; justify-content: center; gap: 3rem; margin-bottom: 2rem; flex-wrap: wrap; }
.catalog-feat { color: rgba(255,255,255,0.7); display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; }
.catalog-feat svg { width: 20px; height: 20px; color: var(--orange); }

/* ============================================
   SECTION: Why Us (Capability)
   ============================================ */
.capability { padding: 6rem 0; background: linear-gradient(180deg, var(--blue-dark), var(--blue)); color: var(--white); }
.capability .section-title h2 { color: var(--white); }
.capability .section-title p { color: rgba(255,255,255,0.55); }
.cap-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }
.cap-card {
  background: rgba(255,255,255,0.04); border: 1px solid rgba(255,255,255,0.07);
  border-radius: var(--radius-lg); padding: 2rem 1.5rem; text-align: center;
  transition: all var(--transition);
}
.cap-card:hover { background: rgba(255,255,255,0.08); transform: translateY(-4px); }
.cap-card .cap-icon { margin-bottom: 1rem; display: flex; justify-content: center; }
.cap-card .cap-icon svg { width: 44px; height: 44px; color: var(--orange); }
.cap-card h3 { color: var(--white); font-size: 1rem; margin-bottom: 0.5rem; }
.cap-card p { color: rgba(255,255,255,0.5); font-size: 0.84rem; }

/* ============================================
   SECTION: Certifications
   ============================================ */
.certs { padding: 4rem 0; background: var(--white); border-top: 1px solid var(--gray-100); }
.cert-strip { display: flex; align-items: center; justify-content: center; gap: 4rem; flex-wrap: wrap; }
.cert-item { text-align: center; opacity: 0.65; transition: opacity var(--transition); }
.cert-item:hover { opacity: 1; }
.cert-item .cert-icon { margin-bottom: 0.5rem; display: flex; justify-content: center; }
.cert-item .cert-icon svg { width: 36px; height: 36px; color: var(--gray-500); }
.cert-item p { font-size: 0.82rem; font-weight: 700; color: var(--gray-500); }

/* ============================================
   SECTION: Contact
   ============================================ */
.contact { padding: 6rem 0; background: var(--gray-50); }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 3rem; align-items: start; }
.contact-info .contact-item { display: flex; align-items: flex-start; gap: 1rem; padding: 1.1rem 0; border-bottom: 1px solid var(--gray-200); }
.contact-icon { flex-shrink: 0; width: 48px; height: 48px; background: rgba(244,129,32,0.08); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; border: 1.5px solid rgba(244,129,32,0.1); }
.contact-icon svg { width: 22px; height: 22px; color: var(--orange); }
.contact-info h3 { font-size: 1rem; margin-bottom: 0.1rem; font-weight: 700; }
.contact-info p { color: var(--gray-500); font-size: 0.9rem; }

.inquiry-form { background: var(--white); border-radius: var(--radius-lg); padding: 2.5rem; box-shadow: var(--shadow-lg); border: 1px solid var(--gray-100); }
.inquiry-form h3 { margin-bottom: 1.5rem; font-size: 1.2rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { margin-bottom: 1.1rem; }
.form-group label { display: block; font-size: 0.84rem; font-weight: 700; margin-bottom: 0.35rem; color: var(--gray-800); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 0.7rem 1rem; border: 1.5px solid var(--gray-200);
  border-radius: var(--radius); font-size: 0.9rem; font-family: inherit;
  background: var(--gray-50); transition: all var(--transition); color: var(--gray-800);
}
.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(244,129,32,0.08); background: var(--white);
}
.form-group textarea { resize: vertical; min-height: 110px; }
.form-group.full { grid-column: 1 / -1; }

/* ============================================
   FOOTER
   ============================================ */
.footer { background: var(--gray-900); color: var(--gray-300); padding: 4.5rem 0 2rem; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 3rem; padding-bottom: 2.5rem; border-bottom: 1px solid rgba(255,255,255,0.05); }
.footer h4 { color: var(--white); font-size: 0.95rem; margin-bottom: 1rem; font-weight: 700; }
.footer p, .footer a { font-size: 0.84rem; color: rgba(255,255,255,0.45); }
.footer a:hover { color: var(--orange); }
.footer-links li { margin-bottom: 0.45rem; }
.footer-bottom { padding-top: 1.5rem; text-align: center; font-size: 0.8rem; color: rgba(255,255,255,0.25); }

/* ============================================
   SCROLL TO TOP
   ============================================ */
.scroll-top {
  position: fixed; bottom: 2rem; right: 2rem; width: 46px; height: 46px;
  background: var(--orange); color: var(--white); border: none; border-radius: 50%;
  font-size: 1.2rem; cursor: pointer; box-shadow: var(--shadow-orange);
  opacity: 0; transform: translateY(20px); transition: all var(--transition);
  pointer-events: none; z-index: 999; display: flex; align-items: center; justify-content: center;
}
.scroll-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
.scroll-top:hover { background: #e0730e; transform: translateY(-3px); }

/* ============================================
   PAGE BANNER
   ============================================ */
.page-banner { background: linear-gradient(135deg, var(--blue-dark), var(--blue-mid)); padding: 8rem 0 3rem; text-align: center; }
.page-banner h1 { color: var(--white); margin-bottom: 0.5rem; }
.page-banner p { color: rgba(255,255,255,0.55); font-size: 1.05rem; }
.breadcrumb { display: flex; justify-content: center; gap: 0.5rem; font-size: 0.85rem; color: rgba(255,255,255,0.4); margin-top: 0.5rem; }
.breadcrumb a { color: var(--orange-light); }
.breadcrumb a:hover { text-decoration: underline; }

/* ============================================
   PRODUCTS PAGE
   ============================================ */
.products-page { padding: 4rem 0; background: var(--white); }
.product-filter-bar { display: flex; gap: 1rem; margin-bottom: 2.5rem; flex-wrap: wrap; align-items: center; justify-content: space-between; }
.filter-tags { display: flex; gap: 0.5rem; flex-wrap: wrap; }
.filter-tag { padding: 0.45rem 1.1rem; border-radius: 50px; font-size: 0.84rem; font-weight: 600; background: var(--gray-50); border: 1.5px solid var(--gray-200); cursor: pointer; transition: all var(--transition); }
.filter-tag:hover, .filter-tag.active { background: var(--orange); color: var(--white); border-color: var(--orange); }
.product-search { padding: 0.55rem 1rem; border: 1.5px solid var(--gray-200); border-radius: var(--radius); font-size: 0.9rem; width: 240px; background: var(--gray-50); transition: all var(--transition); }
.product-search:focus { outline: none; border-color: var(--orange); box-shadow: 0 0 0 3px rgba(244,129,32,0.08); }
.product-detail-cards { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.5rem; }
.prod-detail-card { background: var(--white); border: 1px solid var(--gray-100); border-radius: var(--radius-lg); padding: 1.8rem; box-shadow: var(--shadow-sm); transition: all var(--transition); display: flex; gap: 1.5rem; }
.prod-detail-card:hover { box-shadow: var(--shadow); border-color: var(--gray-200); }
.prod-detail-card .prod-thumb { width: 100px; height: 100px; background: var(--gray-50); border-radius: var(--radius); display: flex; align-items: center; justify-content: center; flex-shrink: 0; border: 1px solid var(--gray-100); }
.prod-detail-card .prod-thumb svg { width: 48px; height: 48px; color: var(--orange); }
.prod-detail-card .prod-info h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.prod-detail-card .prod-info p { font-size: 0.84rem; color: var(--gray-500); margin-bottom: 0.5rem; }
.prod-specs { display: flex; flex-wrap: wrap; gap: 0.3rem; margin-bottom: 0.75rem; }
.prod-specs .spec-tag { font-size: 0.75rem; }
.prod-meta { display: flex; gap: 1.5rem; font-size: 0.82rem; color: var(--gray-500); align-items: center; }
.prod-meta span { font-weight: 700; color: var(--blue-dark); }

/* ============================================
   ABOUT PAGE
   ============================================ */
.about-page { padding: 4rem 0; background: var(--white); }
.about-story { max-width: 800px; margin: 0 auto 4rem; text-align: center; }
.about-story p { color: var(--gray-500); margin-bottom: 1rem; font-size: 1rem; line-height: 1.75; }
.timeline { max-width: 700px; margin: 0 auto; position: relative; }
.timeline::before { content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px; background: var(--gray-200); transform: translateX(-50%); }
.timeline-item { display: grid; grid-template-columns: 1fr 120px 1fr; gap: 1.5rem; align-items: start; margin-bottom: 2.5rem; }
.timeline-year { text-align: center; background: var(--orange); color: var(--white); font-weight: 800; padding: 0.3rem 0.8rem; border-radius: var(--radius); font-size: 0.88rem; }
.timeline-content { padding: 1rem 1.25rem; background: var(--gray-50); border-radius: var(--radius); }
.timeline-content h4 { font-size: 0.95rem; margin-bottom: 0.25rem; }
.timeline-content p { font-size: 0.84rem; color: var(--gray-500); }

/* ============================================
   CONTACT PAGE
   ============================================ */
.contact-page { padding: 4rem 0; background: var(--white); }
.contact-page .contact-grid { margin-top: 1rem; }
.map-placeholder { background: var(--gray-50); border-radius: var(--radius-lg); height: 280px; display: flex; align-items: center; justify-content: center; color: var(--gray-300); font-size: 0.95rem; border: 1px dashed var(--gray-200); }

/* ============================================
   COUNTER ANIMATION
   ============================================ */
.stat-num { display: inline-block; }

/* ============================================
   ANIMATIONS & EFFECTS
   ============================================ */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(30px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes shimmer { 0% { background-position: -200px 0; } 100% { background-position: 200px 0; } }
.animate-in { animation: fadeInUp 0.6s ease forwards; }
.reveal { opacity: 0; transform: translateY(24px); transition: all 0.6s ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero p { max-width: 100%; }
  .hero-buttons { justify-content: center; }
  .hero-stats { justify-content: center; }
  .hero-visual { display: none; }
  .product-categories { grid-template-columns: repeat(3, 1fr); }
  .process-steps { grid-template-columns: repeat(5, 1fr); gap: 0.5rem; }
  .process-steps::before { left: 5%; right: 5%; top: 32px; }
  .process-step .step-circle { width: 64px; height: 64px; }
  .process-step .step-circle svg { width: 28px; height: 28px; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .product-detail-cards { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; }
  .timeline::before { left: 20px; }
}

/* ============================================
   PRODUCT IMAGE SHOWCASE (NEW)
   ============================================ */
.prod-showcase { padding: 6rem 0; background: var(--white); }
.showcase-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.8rem; }
.showcase-card {
  background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); overflow: hidden;
  transition: all var(--transition); border: 1px solid var(--gray-100);
}
.showcase-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.showcase-img {
  width: 100%; height: 240px; object-fit: cover;
  display: block; background: linear-gradient(135deg, #e9ecf2 0%, #cdd3de 50%, #a3adc1 100%);
  position: relative; overflow: hidden;
}
.showcase-img::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(6,14,26,0.6) 100%);
}
.showcase-img.metal-1 { background: linear-gradient(135deg, #5a6477 0%, #7a8497 30%, #50576b 60%, #3a4255 100%); }
.showcase-img.metal-2 { background: linear-gradient(135deg, #6b738a 0%, #8a92a3 30%, #50576b 60%, #2a3244 100%); }
.showcase-img.metal-3 { background: linear-gradient(135deg, #4a5468 0%, #6b738a 35%, #3a4255 65%, #232836 100%); }
.showcase-img.metal-4 { background: linear-gradient(135deg, #7a8497 0%, #939bb0 30%, #5a6477 60%, #3a4a5a 100%); }
.showcase-img.metal-5 { background: linear-gradient(135deg, #5a6477 0%, #7a8490 30%, #4a5468 60%, #2a3548 100%); }
.showcase-img.metal-6 { background: linear-gradient(135deg, #6b758a 0%, #8a94a3 30%, #555f6b 60%, #3a4555 100%); }
.showcase-img .img-label {
  position: absolute; bottom: 0.8rem; left: 0.8rem; z-index: 1;
  background: var(--orange); color: #fff; padding: 0.25rem 0.75rem;
  border-radius: 4px; font-size: 0.75rem; font-weight: 700;
}
.showcase-img .img-icon {
  position: absolute; top: 50%; left: 50%; transform: translate(-50%,-60%);
  z-index: 1; opacity: 0.6;
}
.showcase-img .img-icon svg { width: 72px; height: 72px; color: rgba(255,255,255,0.5); }
.showcase-body { padding: 1.3rem 1.5rem 1.5rem; }
.showcase-body h3 { font-size: 1.05rem; margin-bottom: 0.3rem; }
.showcase-body .showcase-specs { display: flex; flex-wrap: wrap; gap: 0.4rem; margin: 0.6rem 0; }
.showcase-body .showcase-specs span {
  font-size: 0.76rem; background: var(--gray-50); border: 1px solid var(--gray-100);
  padding: 0.2rem 0.6rem; border-radius: 4px; color: var(--gray-600);
}

/* ============================================
   ABOUT IMAGE PLACEHOLDER
   ============================================ */
.about-visual-box {
  background: linear-gradient(135deg, #1b3a6b 0%, #13294b 40%, #0d1b33 100%);
  border-radius: var(--radius-lg); height: 380px; position: relative; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}
.about-visual-box::after {
  content: ''; position: absolute; top: 16px; left: 16px; right: -16px; bottom: -16px;
  border: 2.5px solid var(--orange); border-radius: var(--radius-lg); z-index: -1;
}
.about-visual-box .visual-icon { position: relative; z-index: 1; }
.about-visual-box .visual-icon svg { width: 100px; height: 100px; color: rgba(244,129,32,0.5); }

/* ============================================
   IMAGE READY SLOTS
   ============================================ */
.img-slot {
  background: linear-gradient(135deg, #e9ecf2, #cdd3de);
  border: 2px dashed var(--gray-200); border-radius: var(--radius-lg);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 0.5rem; color: var(--gray-300);
  font-size: 0.9rem; min-height: 200px;
}
.img-slot svg { width: 40px; height: 40px; opacity: 0.4; }

@media (max-width: 1024px) { .showcase-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .showcase-grid { grid-template-columns: 1fr; } .showcase-img { height: 200px; } }

@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-links.open { display: flex; flex-direction: column; position: absolute; top: 70px; left: 0; right: 0; background: var(--blue-dark); padding: 1.5rem; gap: 1.2rem; border-bottom: 2px solid var(--orange); }
  .mobile-toggle { display: flex; }
  .product-categories { grid-template-columns: repeat(2, 1fr); }
  .process-steps { grid-template-columns: 1fr; gap: 1.5rem; }
  .process-steps::before { display: none; }
  .cap-grid { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 1rem; align-items: center; }
  .form-row { grid-template-columns: 1fr; }
  .product-filter-bar { flex-direction: column; align-items: stretch; }
  .product-search { width: 100%; }
  .cert-strip { gap: 2rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .catalog-features { flex-direction: column; align-items: center; gap: 1rem; }
}