/* ==========================================================================
   FOSS LUBRICATION (泉州市福斯润滑科技有限公司)
   Enterprise B2B Master Stylesheet (Responsive, High-Performance, Accessible)
   ========================================================================== */

:root {
  /* Brand Color Tokens */
  --brand-blue: #0d5bb5;
  --brand-blue-hover: #094791;
  --brand-blue-light: #ebf3fb;
  --brand-blue-dark: #083b77;
  --brand-red: #cb1d43;
  --brand-red-hover: #a81334;
  --brand-red-light: #fdf2f4;
  --brand-amber: #f59e0b;
  --brand-amber-light: #fef3c7;
  
  /* Surfaces */
  --surface-dark-900: #0a1128;
  --surface-dark-800: #0f172a;
  --surface-dark-700: #1e293b;
  --surface-light-50: #f8fafc;
  --surface-light-100: #f1f5f9;
  --surface-white: #ffffff;
  
  /* Typography Colors (WCAG 2.1 AA Compliant) */
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;
  --text-white: #ffffff;
  --text-white-muted: #cbd5e1;
  
  /* Borders */
  --border-light: #e2e8f0;
  --border-dark: #334155;
  --border-brand: rgba(13, 91, 181, 0.35);
  
  /* States */
  --state-success: #10b981;
  --state-warning: #f59e0b;
  --state-danger: #ef4444;
  
  /* Radii & Shadows */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 10px rgba(0,0,0,0.08);
  --shadow-lg: 0 12px 24px -4px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 24px rgba(13, 91, 181, 0.25);
  
  /* Layout */
  --container-max: 1240px;
  --header-height: 80px;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', Consolas, Menlo, monospace;
}

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

html {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-main);
  background-color: var(--surface-light-50);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

/* Accessible focus ring */
:focus-visible {
  outline: 3px solid var(--brand-amber);
  outline-offset: 2px;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s ease;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

/* Fluid Typography */
h1, .h1 {
  font-size: clamp(1.75rem, 1.25rem + 1.8vw, 2.625rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--text-main);
}

h2, .h2 {
  font-size: clamp(1.375rem, 1.05rem + 1.2vw, 2rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
}

h3, .h3 {
  font-size: clamp(1.125rem, 0.95rem + 0.7vw, 1.5rem);
  font-weight: 600;
  line-height: 1.35;
}

h4, .h4 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

p {
  margin-bottom: 1rem;
}
p:last-child {
  margin-bottom: 0;
}

.text-muted {
  color: var(--text-muted);
}
.text-mono {
  font-family: var(--font-mono);
}
.text-brand-blue {
  color: var(--brand-blue);
}
.text-brand-red {
  color: var(--brand-red);
}
.text-amber {
  color: var(--brand-amber);
}

/* Containers */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 20px;
  padding-right: 20px;
}

/* ==========================================================================
   Top Notification & Header Navigation
   ========================================================================== */
.top-notice {
  background: var(--surface-dark-900);
  color: var(--text-white-muted);
  font-size: 0.8125rem;
  padding: 8px 0;
  border-bottom: 1px solid var(--surface-dark-700);
}
.top-notice-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.top-notice-badges {
  display: flex;
  align-items: center;
  gap: 12px;
}
.top-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,255,255,0.08);
  padding: 2px 8px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
}
.top-badge-dot {
  width: 6px;
  height: 6px;
  background-color: var(--state-success);
  border-radius: 50%;
}
.top-contact-links {
  display: flex;
  align-items: center;
  gap: 16px;
}
.top-contact-links a:hover {
  color: var(--text-white);
  text-decoration: underline;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 16px;
  flex-wrap: nowrap;
}
.site-logo-link {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.site-logo-img {
  height: 46px;
  width: auto;
  border-radius: var(--radius-sm);
}
.site-logo-text {
  display: flex;
  flex-direction: column;
  justify-content: center;
}
.site-logo-text .brand-name {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--brand-blue);
  line-height: 1.15;
  letter-spacing: 0.01em;
  white-space: nowrap;
}
.site-logo-text .corp-sub {
  font-size: 0.6875rem;
  color: var(--text-muted);
  font-weight: 600;
  white-space: nowrap;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  white-space: nowrap;
  flex-wrap: nowrap;
  margin: 0;
  padding: 0;
}
.nav-link {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-main);
  padding: 6px 4px;
  position: relative;
  white-space: nowrap;
  transition: color 0.15s ease;
}
.nav-link:hover, .nav-link.active {
  color: var(--brand-blue);
}
.nav-link.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--brand-blue);
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

/* Mobile Menu Toggle */
.mobile-menu-btn {
  display: none;
  background: none;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 8px 10px;
  cursor: pointer;
  color: var(--text-main);
}
.mobile-menu-btn svg {
  width: 22px;
  height: 22px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all 0.2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--brand-blue);
  color: var(--text-white);
  box-shadow: 0 2px 4px rgba(13, 91, 181, 0.25);
}
.btn-primary:hover {
  background: var(--brand-blue-hover);
  box-shadow: 0 4px 10px rgba(13, 91, 181, 0.35);
  transform: translateY(-1px);
}
.btn-accent {
  background: var(--brand-red);
  color: var(--text-white);
}
.btn-accent:hover {
  background: var(--brand-red-hover);
  transform: translateY(-1px);
}
.btn-outline {
  border-color: var(--border-light);
  background: var(--surface-white);
  color: var(--text-main);
}
.btn-outline:hover {
  border-color: var(--brand-blue);
  color: var(--brand-blue);
  background: var(--brand-blue-light);
}
.btn-sm {
  padding: 6px 14px;
  font-size: 0.8125rem;
}
.btn-lg {
  padding: 14px 28px;
  font-size: 1.05rem;
}

/* ==========================================================================
   Hero Section (Engineering-First)
   ========================================================================== */
.hero-section {
  background: linear-gradient(135deg, var(--surface-dark-900) 0%, #0d234d 60%, #152f63 100%);
  color: var(--text-white);
  padding: 64px 0 80px;
  position: relative;
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image: radial-gradient(rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 28px 28px;
  opacity: 0.6;
  pointer-events: none;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
  position: relative;
  z-index: 2;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(203, 29, 67, 0.2);
  border: 1px solid rgba(203, 29, 67, 0.4);
  color: #ff859d;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
}
.hero-title {
  color: var(--text-white);
  margin-bottom: 20px;
}
.hero-desc {
  font-size: 1.125rem;
  color: var(--text-white-muted);
  margin-bottom: 32px;
  max-width: 620px;
  line-height: 1.65;
}
.hero-cta-group {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
}
.hero-stat-item .stat-num {
  font-family: var(--font-mono);
  font-size: 1.65rem;
  font-weight: 800;
  color: var(--brand-amber);
  display: block;
}
.hero-stat-item .stat-label {
  font-size: 0.8125rem;
  color: var(--text-white-muted);
}

/* Hero Right: Drum & Packaging Preview Card */
.hero-card {
  background: rgba(15, 23, 42, 0.8);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  backdrop-filter: blur(12px);
}
.hero-card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  padding-bottom: 14px;
  margin-bottom: 18px;
}
.hero-card-header h3 {
  font-size: 1.1rem;
  color: var(--text-white);
}
.drum-visual-box {
  background: radial-gradient(circle at center, #1e3a8a 0%, #0a1128 80%);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  margin-bottom: 18px;
  border: 1px dashed rgba(255,255,255,0.2);
}
.drum-art-wrap {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 16px;
  margin-bottom: 12px;
}
.drum-svg-badge {
  display: inline-block;
  background: rgba(255,255,255,0.06);
  padding: 10px 16px;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-family: var(--font-mono);
  color: var(--brand-amber);
}

/* ==========================================================================
   Section Common Layout
   ========================================================================== */
.section {
  padding: 72px 0;
}
.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 48px;
}
.section-tag {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--brand-blue);
  background: var(--brand-blue-light);
  padding: 4px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}
.section-title {
  margin-bottom: 14px;
  color: var(--text-main);
}
.section-subtitle {
  color: var(--text-muted);
  font-size: 1.05rem;
}

/* ==========================================================================
   Smart Interactive Tool 1: Oil Selector / Advisor
   ========================================================================== */
.selector-tool-box {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
  margin-bottom: 48px;
}
.selector-controls {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 28px;
}
.control-group label {
  display: block;
  font-weight: 700;
  font-size: 0.9375rem;
  margin-bottom: 8px;
  color: var(--text-main);
}
.select-styled {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background-color: var(--surface-light-50);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-main);
  transition: all 0.2s ease;
  cursor: pointer;
}
.select-styled:focus {
  border-color: var(--brand-blue);
  background-color: var(--surface-white);
  outline: none;
}

.selector-result-card {
  background: linear-gradient(135deg, var(--surface-dark-900) 0%, #112853 100%);
  color: var(--text-white);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  display: grid;
  grid-template-columns: 1.2fr 1fr auto;
  gap: 24px;
  align-items: center;
}
.res-grade-pill {
  display: inline-block;
  background: var(--brand-red);
  color: #fff;
  font-weight: 800;
  font-size: 1.25rem;
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 6px;
}
.res-details-list {
  list-style: none;
  font-size: 0.875rem;
  color: inherit;
  margin: 0;
  padding: 0;
}
.res-details-list li {
  margin-bottom: 6px;
  color: inherit;
  line-height: 1.6;
}
.res-details-list strong {
  color: inherit;
  font-weight: 700;
}
.selector-result-card .res-details-list,
.hero-card .res-details-list,
.dark-card .res-details-list {
  color: var(--text-white-muted);
}
.selector-result-card .res-details-list strong,
.hero-card .res-details-list strong,
.dark-card .res-details-list strong {
  color: #ffffff;
}

/* ==========================================================================
   Cohesive Factory & Corporate Info Card Component
   ========================================================================== */
.factory-info-card {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 24px;
}
.factory-info-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 2px solid var(--brand-blue);
  padding-bottom: 10px;
  margin-bottom: 16px;
}
.factory-info-header h3 {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 0;
}
.info-row-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
}
.info-row-item {
  display: flex;
  flex-direction: column;
  padding: 8px 12px;
  background: var(--surface-light-50);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  transition: all 0.2s ease;
}
.info-row-item:hover {
  border-color: var(--brand-blue);
  background: #ffffff;
  box-shadow: var(--shadow-sm);
}
.info-row-key {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--brand-blue);
  margin-bottom: 3px;
}
.info-row-val {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.45;
}

/* ==========================================================================
   Smart Interactive Tool 2: 208L Steel Drum Container Loading Calculator
   ========================================================================== */
.calc-container-box {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 36px;
  box-shadow: var(--shadow-md);
}
.calc-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 36px;
  align-items: start;
}
.calc-inputs {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.calc-field label {
  display: block;
  font-weight: 600;
  font-size: 0.875rem;
  margin-bottom: 6px;
}
.calc-radio-group {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}
.calc-radio-card {
  border: 2px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 12px;
  cursor: pointer;
  transition: all 0.2s;
  text-align: center;
}
.calc-radio-card:hover, .calc-radio-card.active {
  border-color: var(--brand-blue);
  background: var(--brand-blue-light);
}
.calc-radio-card input {
  display: none;
}
.calc-radio-card .title {
  font-weight: 700;
  display: block;
  font-size: 0.9375rem;
}
.calc-radio-card .sub {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.calc-display-card {
  background: var(--surface-dark-900);
  color: var(--text-white);
  border-radius: var(--radius-md);
  padding: 28px;
  border: 1px solid var(--surface-dark-700);
}
.calc-metric-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-bottom: 20px;
}
.calc-metric-box {
  background: rgba(255,255,255,0.06);
  padding: 14px;
  border-radius: var(--radius-sm);
}
.calc-metric-box .label {
  font-size: 0.75rem;
  color: var(--text-white-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  display: block;
}
.calc-metric-box .value {
  font-family: var(--font-mono);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--brand-amber);
}
.calc-status-bar {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.8125rem;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 185, 129, 0.15);
  border: 1px solid rgba(16, 185, 129, 0.3);
  color: #34d399;
}

/* ==========================================================================
   Product Grid & Technical Cards
   ========================================================================== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.product-card {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}
.product-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--border-brand);
}
.product-card-hero-sku {
  grid-column: span 2;
  border-left: 4px solid var(--brand-red);
}
.product-card-img-wrap {
  width: 100%;
  height: 200px;
  overflow: hidden;
  background: var(--surface-light-100);
  position: relative;
  border-bottom: 1px solid var(--border-light);
}
.product-card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
  display: block;
}
.product-card:hover .product-card-img-wrap img {
  transform: scale(1.05);
}
.product-card-img-badge {
  position: absolute;
  bottom: 10px;
  left: 12px;
  background: rgba(10, 17, 40, 0.88);
  color: #ffffff;
  font-size: 0.6875rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,0.2);
}
.product-card-badge-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 14px 20px 0;
}
.iso-badge {
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 0.8125rem;
  background: var(--brand-blue-light);
  color: var(--brand-blue);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
}
.pkg-tag {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
}
.product-card-body {
  padding: 18px 20px;
  flex: 1;
}
.product-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}
.product-sub {
  font-size: 0.875rem;
  color: var(--brand-red);
  font-weight: 600;
  margin-bottom: 12px;
}
.product-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 16px;
}
.product-spec-table {
  width: 100%;
  font-size: 0.8125rem;
  border-collapse: collapse;
  margin-bottom: 16px;
}
.product-spec-table td {
  padding: 6px 4px;
  border-bottom: 1px solid var(--border-light);
}
.product-spec-table td:first-child {
  color: var(--text-muted);
}
.product-spec-table td:last-child {
  text-align: right;
  font-family: var(--font-mono);
  font-weight: 600;
}
.product-card-footer {
  padding: 14px 20px;
  background: var(--surface-light-50);
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ==========================================================================
   Factory Photographic Evidence Gallery Component
   ========================================================================== */
.photo-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.photo-gallery-item {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s ease;
  display: flex;
  flex-direction: column;
}
.photo-gallery-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--brand-blue);
}
.photo-gallery-img-box {
  position: relative;
  width: 100%;
  height: 230px;
  background: var(--surface-dark-900);
  overflow: hidden;
}
.photo-gallery-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.35s ease;
}
.photo-gallery-item:hover .photo-gallery-img-box img {
  transform: scale(1.05);
}
.photo-gallery-badge {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(13, 91, 181, 0.9);
  color: #fff;
  font-size: 0.6875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}
.photo-gallery-caption {
  padding: 18px 20px;
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.photo-gallery-caption h4 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 6px;
}
.photo-gallery-caption p {
  font-size: 0.8125rem;
  color: var(--text-muted);
  line-height: 1.55;
  margin-bottom: 12px;
}
.photo-gallery-specs {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  border-top: 1px solid var(--border-light);
  padding-top: 10px;
  font-size: 0.75rem;
  font-family: var(--font-mono);
  color: var(--brand-blue);
  font-weight: 600;
}

/* ==========================================================================
   Technical Data Tables & Comparisons
   ========================================================================== */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  background: var(--surface-white);
  box-shadow: var(--shadow-sm);
  margin: 24px 0 32px;
}
.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.875rem;
  text-align: left;
}
.data-table th {
  background: var(--surface-dark-900);
  color: var(--text-white);
  padding: 14px 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  border-right: 1px solid rgba(255,255,255,0.1);
  white-space: nowrap;
}
.data-table th:last-child {
  border-right: none;
}
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--border-light);
  border-right: 1px solid var(--border-light);
}
.data-table td:last-child {
  border-right: none;
}
.data-table tr:nth-child(even) {
  background-color: var(--surface-light-50);
}
.data-table tr:hover {
  background-color: var(--brand-blue-light);
}

/* ==========================================================================
   Packaging & Drum Showcase
   ========================================================================== */
.pkg-feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 36px;
}
.pkg-feature-card {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 28px;
  text-align: center;
}
.pkg-icon-wrap {
  width: 64px;
  height: 64px;
  background: var(--brand-blue-light);
  color: var(--brand-blue);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
}
.pkg-icon-wrap svg {
  width: 32px;
  height: 32px;
}

/* ==========================================================================
   RFQ & Fast Sample Inquiry Form
   ========================================================================== */
.rfq-section-wrap {
  background: linear-gradient(to bottom, var(--surface-light-100), #ffffff);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
}
.rfq-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.form-field.full-span {
  grid-column: span 2;
}
.form-field label {
  font-weight: 600;
  font-size: 0.875rem;
  color: var(--text-main);
}
.form-input, .form-select, .form-textarea {
  padding: 10px 14px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  background: var(--surface-white);
  font-size: 0.9375rem;
  transition: border-color 0.2s;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--brand-blue);
  outline: none;
}
.form-textarea {
  min-height: 100px;
  resize: vertical;
}

/* ==========================================================================
   FAQ Accordion
   ========================================================================== */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.faq-item {
  background: var(--surface-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 20px;
}
.faq-question {
  font-weight: 700;
  font-size: 1rem;
  color: var(--text-main);
  margin-bottom: 8px;
  display: flex;
  align-items: flex-start;
  gap: 10px;
}
.faq-question svg {
  color: var(--brand-blue);
  flex-shrink: 0;
  margin-top: 3px;
}
.faq-answer {
  font-size: 0.875rem;
  color: var(--text-muted);
  line-height: 1.6;
}

/* ==========================================================================
   Footer & Legal Disclaimer
   ========================================================================== */
.site-footer {
  background: var(--surface-dark-900);
  color: var(--text-white);
  padding: 64px 0 32px;
  margin-top: auto;
  border-top: 1px solid var(--surface-dark-700);
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand p {
  color: var(--text-white-muted);
  font-size: 0.875rem;
  margin-top: 14px;
  line-height: 1.6;
}
.footer-col h4 {
  font-size: 1rem;
  color: #fff;
  margin-bottom: 18px;
  border-bottom: 2px solid var(--brand-blue);
  display: inline-block;
  padding-bottom: 4px;
}
.footer-links {
  list-style: none;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: var(--text-white-muted);
  font-size: 0.875rem;
}
.footer-links a:hover {
  color: #fff;
  text-decoration: underline;
}

.legal-notice-box {
  background: rgba(0, 0, 0, 0.4);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-sm);
  padding: 16px;
  font-size: 0.75rem;
  color: #94a3b8;
  line-height: 1.6;
  margin-bottom: 32px;
}
.legal-notice-box strong {
  color: #e2e8f0;
}

.footer-bottom-bar {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 0.8125rem;
  color: var(--text-white-muted);
}

/* ==========================================================================
   Responsive Adaptations
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-grid {
    grid-template-columns: 1fr;
  }
  .product-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .photo-gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .product-card-hero-sku {
    grid-column: span 2;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .calc-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 1040px) {
  .nav-links {
    display: none;
    position: absolute;
    top: var(--header-height);
    left: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 20px;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.mobile-open {
    display: flex;
  }
  .mobile-menu-btn {
    display: block;
  }
  .product-grid, .pkg-feature-grid, .faq-grid {
    grid-template-columns: 1fr;
  }
  .photo-gallery-grid {
    grid-template-columns: 1fr;
  }
  .product-card-hero-sku {
    grid-column: span 1;
  }
  .selector-controls, .rfq-form-grid {
    grid-template-columns: 1fr;
  }
  .form-field.full-span {
    grid-column: span 1;
  }
  .selector-result-card {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
  }
  .hero-stats {
    grid-template-columns: 1fr 1fr;
  }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}