/* ==========================================================================
   ZHONGLIAN INDUSTRIAL - GLOBAL B2B EXPORT PORTAL STYLESHEET
   Pure Standalone Responsive CSS (1200px Container, Universal Layout)
   ========================================================================== */

:root {
  --zl-blue: #004ea2;
  --zl-blue-dark: #003774;
  --zl-red: #c8102e;
  --zl-red-hover: #a50b23;
  --zl-text: #1e293b;
  --zl-muted: #64748b;
  --zl-bg-light: #f8fafc;
  --zl-border: #e2e8f0;
}

*, *::before, *::after {
  box-sizing: border-box;
}

body {
  margin: 0;
  padding: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--zl-text);
  background-color: #ffffff;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

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

/* Dynamic Fluid Widescreen Container System */
.zl-container {
  width: 100%;
  max-width: 1640px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3.5vw, 48px);
}

/* Widescreen Header, Topbar, Breadcrumbs & Footer */
.zl-topbar .zl-container,
.zl-header .zl-container,
.zl-breadcrumb-bar .zl-container,
.zl-footer .zl-container {
  width: 100%;
  max-width: 1720px;
  margin: 0 auto;
  padding: 0 clamp(16px, 3.5vw, 48px);
}

/* Top Bar */
.zl-topbar {
  background: #0f172a;
  color: #94a3b8;
  font-size: 13px;
  padding: 9px 0;
  border-bottom: 1px solid #1e293b;
}
.zl-topbar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
}
.zl-topbar-left, .zl-topbar-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.zl-divider {
  color: #334155;
}
.zl-topbar a {
  color: #cbd5e1;
  text-decoration: none;
  transition: color 0.2s;
}
.zl-topbar a:hover {
  color: #38bdf8;
}
.zl-topbar strong {
  color: #38bdf8;
}

/* Header & Main Nav */
.zl-header {
  background: #ffffff;
  border-bottom: 2px solid var(--zl-blue);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}
.zl-header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 75px;
}
.zl-logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}
.zl-logo-img {
  max-height: 48px;
  width: auto;
  display: block;
}
.zl-mobile-toggle {
  display: none;
  background: transparent;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  cursor: pointer;
  padding: 8px 10px;
  flex-direction: column;
  gap: 5px;
  justify-content: center;
  align-items: center;
  transition: all 0.2s ease;
}
.zl-mobile-toggle:hover {
  background: #f8fafc;
  border-color: var(--zl-blue);
}
.zl-mobile-toggle .zl-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #0f172a;
  border-radius: 2px;
  transition: all 0.25s ease-in-out;
}
.zl-mobile-toggle.active .zl-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.zl-mobile-toggle.active .zl-bar:nth-child(2) {
  opacity: 0;
}
.zl-mobile-toggle.active .zl-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}
.zl-nav-wrap {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
.zl-nav {
  display: flex;
  list-style: none;
  margin: 0;
  padding: 0;
  align-items: center;
  flex-shrink: 0;
}
.zl-nav li {
  flex-shrink: 0;
}
.zl-nav li a {
  display: block;
  padding: 0 16px;
  height: 75px;
  line-height: 75px;
  font-size: 14.5px;
  font-weight: 700;
  color: #1e293b;
  text-decoration: none;
  position: relative;
  transition: color 0.2s;
  white-space: nowrap;
}
.zl-nav li a:hover,
.zl-nav li.active a {
  color: var(--zl-blue);
}
.zl-nav li a:hover::after,
.zl-nav li.active a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 16px;
  right: 16px;
  height: 3px;
  background: var(--zl-blue);
}
.zl-header-cta {
  margin-left: 20px;
  flex-shrink: 0;
}
.zl-header-cta a {
  background: var(--zl-red);
  color: #ffffff !important;
  padding: 11px 22px;
  font-size: 13.5px;
  font-weight: 700;
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  letter-spacing: 0.3px;
  transition: all 0.2s;
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(200, 16, 46, 0.25);
}
.zl-header-cta a:hover {
  background: var(--zl-red-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(200, 16, 46, 0.35);
}

/* Hero Section */
.zl-hero {
  position: relative;
  background-size: cover;
  background-position: center;
  color: #ffffff;
  padding: 95px 0 85px;
}
.zl-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15, 23, 42, 0.78);
}
.zl-hero-content {
  position: relative;
  z-index: 2;
  max-width: 860px;
}
.zl-hero-badge {
  display: inline-block;
  background: var(--zl-red);
  color: #ffffff;
  font-size: 12px;
  font-weight: 800;
  padding: 5px 14px;
  border-radius: 2px;
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 18px;
}
.zl-hero h1 {
  font-size: 42px;
  font-weight: 800;
  line-height: 1.25;
  margin: 0 0 18px 0;
  color: #ffffff;
}
.zl-hero p {
  font-size: 17px;
  line-height: 1.65;
  color: #e2e8f0;
  margin: 0 0 32px 0;
}
.zl-hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.zl-btn-primary {
  background: var(--zl-blue);
  color: #ffffff !important;
  padding: 14px 30px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  transition: background 0.2s;
}
.zl-btn-primary:hover {
  background: var(--zl-blue-dark);
}
.zl-btn-outline {
  background: transparent;
  color: #ffffff !important;
  border: 2px solid #ffffff;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  transition: all 0.2s;
}
.zl-btn-outline:hover {
  background: #ffffff;
  color: #0f172a !important;
}

/* Four Pillars Bar */
.zl-pillars {
  background: #ffffff;
  border-bottom: 1px solid var(--zl-border);
  padding: 36px 0;
  box-shadow: 0 4px 16px rgba(0,0,0,0.03);
}
.zl-pillars-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.zl-pillar-item {
  padding: 0 16px;
  border-left: 3px solid var(--zl-blue);
}
.zl-pillar-num {
  font-size: 32px;
  font-weight: 900;
  color: #0f172a;
  margin-bottom: 2px;
}
.zl-pillar-title {
  font-size: 14px;
  font-weight: 700;
  color: #334155;
  margin-bottom: 3px;
}
.zl-pillar-desc {
  font-size: 12px;
  color: #64748b;
  line-height: 1.45;
}

/* Sections & Typography */
.zl-section {
  padding: 65px 0;
}
.zl-section-alt {
  background: #f8fafc;
}
.zl-section-header {
  text-align: center;
  max-width: 800px;
  margin: 0 auto 45px;
}
.zl-section-tag {
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 2px;
  color: var(--zl-blue);
  text-transform: uppercase;
  margin-bottom: 8px;
  display: block;
}
.zl-section-header h2 {
  font-size: 30px;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 12px 0;
}
.zl-section-header p {
  font-size: 15px;
  color: #64748b;
  margin: 0;
  line-height: 1.6;
}

/* Product Cards Grid (4 Columns) */
.zl-product-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.zl-product-card {
  background: #ffffff;
  border: 1px solid var(--zl-border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}
.zl-product-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 78, 162, 0.12);
  border-color: var(--zl-blue);
}
.zl-product-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  background: #f1f5f9;
}
.zl-product-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}
.zl-product-title {
  font-size: 16px;
  font-weight: 800;
  margin: 0 0 8px 0;
  line-height: 1.35;
}
.zl-product-title a {
  color: #0f172a;
  text-decoration: none;
}
.zl-product-standard {
  display: inline-block;
  background: #fee2e2;
  color: #991b1b;
  font-size: 11px;
  font-weight: 700;
  padding: 2px 8px;
  border-radius: 2px;
  margin-bottom: 12px;
  align-self: flex-start;
}
.zl-product-desc {
  font-size: 13px;
  color: #64748b;
  line-height: 1.55;
  margin: 0 0 16px 0;
  flex-grow: 1;
}
.zl-product-specs-list {
  background: #f8fafc;
  border: 1px solid #edf2f7;
  border-radius: 4px;
  padding: 10px 12px;
  margin-bottom: 16px;
  font-size: 12px;
}
.zl-product-specs-list div {
  display: flex;
  justify-content: space-between;
  padding: 3px 0;
  border-bottom: 1px dashed #e2e8f0;
}
.zl-product-specs-list div:last-child {
  border-bottom: none;
}
.zl-product-specs-list span:first-child {
  color: #64748b;
}
.zl-product-specs-list span:last-child {
  color: #0f172a;
  font-weight: 700;
}
.zl-product-btn {
  display: block;
  text-align: center;
  background: #f1f5f9;
  color: var(--zl-blue);
  padding: 10px;
  font-size: 13px;
  font-weight: 700;
  border-radius: 4px;
  text-decoration: none;
  transition: all 0.2s;
}
.zl-product-btn:hover {
  background: var(--zl-blue);
  color: #ffffff;
}

/* Factory & Quality Section */
.zl-factory-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}
.zl-factory-imgs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.zl-factory-imgs img {
  width: 100%;
  height: 230px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--zl-border);
}
.zl-factory-points {
  list-style: none;
  padding: 0;
  margin: 20px 0 0 0;
}
.zl-factory-points li {
  margin-bottom: 18px;
  padding-left: 24px;
  position: relative;
}
.zl-factory-points li::before {
  content: '✓';
  position: absolute;
  left: 0;
  top: 0;
  color: var(--zl-red);
  font-weight: 900;
  font-size: 16px;
}
.zl-factory-points strong {
  display: block;
  font-size: 15px;
  color: #0f172a;
  margin-bottom: 3px;
}
.zl-factory-points p {
  font-size: 13px;
  color: #64748b;
  margin: 0;
  line-height: 1.5;
}

/* News / Blog Section */
.zl-news-split {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 30px;
}
.zl-news-featured {
  background: #ffffff;
  border: 1px solid var(--zl-border);
  border-radius: 6px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.zl-news-featured img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}
.zl-news-featured-body {
  padding: 24px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}
.zl-news-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.zl-news-item {
  background: #ffffff;
  border: 1px solid var(--zl-border);
  border-radius: 6px;
  padding: 16px 20px;
  display: flex;
  gap: 18px;
  align-items: center;
  text-decoration: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}
.zl-news-item:hover {
  border-color: var(--zl-blue);
  box-shadow: 0 4px 12px rgba(0,0,0,0.05);
}
.zl-news-date {
  min-width: 55px;
  text-align: center;
  border-right: 1px solid #edf2f7;
  padding-right: 16px;
}
.zl-news-day {
  font-size: 22px;
  font-weight: 800;
  color: var(--zl-red);
}
.zl-news-month {
  font-size: 11px;
  color: #64748b;
  text-transform: uppercase;
  font-weight: 700;
}
.zl-news-title {
  font-size: 14px;
  font-weight: 700;
  color: #1e293b;
  line-height: 1.45;
  margin-bottom: 4px;
}
.zl-news-author {
  font-size: 12px;
  color: #94a3b8;
}

/* Fast RFQ Banner */
.zl-rfq-banner {
  background: linear-gradient(135deg, #0b2545 0%, #004ea2 100%);
  color: #ffffff;
  border-radius: 6px;
  padding: 40px 48px;
  box-shadow: 0 8px 30px rgba(0,78,162,0.2);
}
.zl-rfq-banner h3 {
  font-size: 26px;
  font-weight: 800;
  margin: 0 0 10px 0;
  color: #ffffff;
}
.zl-rfq-banner p {
  font-size: 15px;
  color: #cbd5e1;
  margin: 0 0 24px 0;
  max-width: 850px;
  line-height: 1.6;
}
.zl-rfq-form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr 1fr;
  gap: 14px;
  margin-bottom: 14px;
}
.zl-rfq-input {
  background: #ffffff;
  border: 1px solid #cbd5e1;
  border-radius: 4px;
  padding: 12px 16px;
  font-size: 14px;
  color: #1e293b;
  width: 100%;
  box-sizing: border-box;
  outline: none;
}
.zl-rfq-input:focus {
  border-color: #38bdf8;
  box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.25);
}
.zl-rfq-submit-row {
  display: flex;
  gap: 14px;
}
.zl-rfq-btn {
  background: var(--zl-red);
  color: #ffffff;
  border: none;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 700;
  border-radius: 4px;
  cursor: pointer;
  transition: background 0.2s;
  white-space: nowrap;
}
.zl-rfq-btn:hover {
  background: var(--zl-red-hover);
}

/* Product Detail Flat & Expanded Layout */
.zl-breadcrumb-bar {
  background: #f1f5f9;
  border-bottom: 1px solid var(--zl-border);
  padding: 12px 0;
  font-size: 13px;
  color: #64748b;
}
.zl-breadcrumb-inner {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.zl-breadcrumb-inner a {
  color: #475569;
  text-decoration: none;
  transition: color 0.2s;
}
.zl-breadcrumb-inner a:hover {
  color: var(--zl-blue);
}
.zl-bc-sep {
  color: #94a3b8;
  font-size: 12px;
}
.zl-bc-current {
  color: #0f172a;
  font-weight: 600;
}

.zl-prod-hero-section {
  padding: 36px 0 48px;
  background: #ffffff;
  border-bottom: 1px solid #eef2f6;
}
.zl-prod-hero-card {
  display: grid;
  grid-template-columns: 48% 52%;
  gap: clamp(32px, 3.5vw, 56px);
  background: transparent;
  border: none;
  border-radius: 0;
  padding: 0;
  box-shadow: none;
  align-items: start;
}
.zl-prod-main-img-box {
  position: relative;
  border-radius: 8px;
  overflow: hidden;
  border: 1px solid var(--zl-border);
  background: #f8fafc;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
}
.zl-prod-main-img {
  width: 100%;
  height: 480px;
  object-fit: cover;
  display: block;
}
@media (min-width: 1600px) {
  .zl-prod-main-img {
    height: 520px;
  }
}
.zl-prod-badge-raw {
  position: absolute;
  top: 14px;
  left: 14px;
  background: var(--zl-red);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(200, 16, 46, 0.35);
  letter-spacing: 0.5px;
}
.zl-prod-badge-warp {
  position: absolute;
  top: 14px;
  right: 14px;
  background: var(--zl-blue);
  color: #ffffff;
  font-size: 12px;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: 2px;
  box-shadow: 0 2px 8px rgba(0, 78, 162, 0.35);
}
.zl-prod-trust-points {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
  background: #f8fafc;
  border: 1px solid var(--zl-border);
  border-radius: 4px;
  padding: 12px 14px;
}
.zl-pt-item {
  text-align: center;
}
.zl-pt-icon {
  display: inline-block;
  width: 18px;
  height: 18px;
  line-height: 18px;
  background: #dcfce7;
  color: #166534;
  border-radius: 50%;
  font-size: 11px;
  font-weight: bold;
  margin-bottom: 3px;
}
.zl-pt-item strong {
  display: block;
  font-size: 13px;
  color: #1e293b;
  margin-bottom: 2px;
}
.zl-pt-item p {
  margin: 0;
  font-size: 11px;
  color: #64748b;
}

.zl-prod-tag-row {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.zl-tag-standard {
  background: #fee2e2;
  color: #991b1b;
  font-size: 12px;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 2px;
  border: 1px solid #fecaca;
}
.zl-tag-cat {
  background: #e0f2fe;
  color: #0369a1;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 2px;
}
.zl-tag-audit {
  background: #dcfce7;
  color: #166534;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 8px;
  border-radius: 2px;
}
.zl-prod-main-title {
  font-size: 26px;
  font-weight: 800;
  color: #0f172a;
  margin: 0 0 10px 0;
  line-height: 1.35;
}
.zl-prod-hero-excerpt {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
  margin: 0 0 14px 0;
}
.zl-prod-pricing-strip {
  background: #f8fafc;
  border: 1px dashed #cbd5e1;
  border-radius: 4px;
  padding: 12px 16px;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}
.zl-price-label {
  font-size: 13px;
  color: #64748b;
}
.zl-price-val {
  font-size: 18px;
  font-weight: 800;
  color: var(--zl-red);
}
.zl-price-tip {
  font-size: 12px;
  color: #94a3b8;
  margin-left: 6px;
}
.zl-stock-status {
  font-size: 12px;
  color: #16a34a;
  font-weight: 600;
}

.zl-prod-quick-specs {
  background: #ffffff;
  border: 1px solid var(--zl-border);
  border-radius: 4px;
  padding: 12px 16px;
  margin-bottom: 18px;
}
.zl-qs-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 20px;
  padding: 7px 0;
  border-bottom: 1px solid #f1f5f9;
  font-size: 13px;
}
.zl-qs-row:last-child {
  border-bottom: none;
}
.zl-qs-k {
  color: #64748b;
}
.zl-qs-v {
  color: #0f172a;
  font-weight: 700;
}

.zl-prod-cta-actions {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.zl-btn-cta-phone {
  background: var(--zl-red);
  color: #ffffff !important;
  text-decoration: none !important;
  padding: 10px 20px;
  border-radius: 4px;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  transition: background 0.2s;
  box-shadow: 0 4px 12px rgba(200, 16, 46, 0.25);
}
.zl-btn-cta-phone:hover {
  background: var(--zl-red-hover);
}
.zl-btn-phone-icon {
  font-size: 20px;
}
.zl-btn-cta-phone small {
  display: block;
  font-size: 11px;
  opacity: 0.9;
  line-height: 1.2;
}
.zl-btn-cta-phone strong {
  display: block;
  font-size: 16px;
  line-height: 1.2;
}
.zl-btn-cta-sample {
  background: var(--zl-blue);
  color: #ffffff !important;
  text-decoration: none !important;
  padding: 12px 20px;
  border-radius: 4px;
  font-size: 13px;
  font-weight: 700;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: background 0.2s;
}
.zl-btn-cta-sample:hover {
  background: var(--zl-blue-dark);
}
.zl-prod-safety-note {
  display: flex;
  gap: 8px;
  align-items: center;
  font-size: 12px;
  color: #64748b;
  margin-top: 14px;
  flex-wrap: wrap;
}

/* Tabs & Expanded Modules */
.zl-prod-tabs-section {
  padding: 0 0 70px;
  background: #ffffff;
}
.zl-prod-nav-bar {
  position: sticky;
  top: 75px;
  z-index: 50;
  background: #ffffff;
  border-top: none;
  border-left: none;
  border-right: none;
  border-bottom: 2px solid #e2e8f0;
  border-radius: 0;
  display: flex;
  margin-bottom: 36px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
  overflow-x: auto;
}
.zl-pnav-link {
  padding: 16px 28px;
  font-size: 14.5px;
  font-weight: 700;
  color: #475569 !important;
  text-decoration: none !important;
  border-bottom: 3px solid transparent;
  white-space: nowrap;
  transition: all 0.2s;
}
.zl-pnav-link:hover, .zl-pnav-link.active {
  color: var(--zl-red) !important;
  border-bottom-color: var(--zl-red);
  background: #fffafa;
}

.zl-pblock {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 36px 40px;
  margin-bottom: 36px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
}

.zl-spec-card {
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: 36px 40px;
  margin-bottom: 36px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
}

.zl-article-container {
  max-width: 1100px;
  margin: 0 auto;
  background: #ffffff;
  border: 1px solid #e2e8f0;
  border-radius: 8px;
  padding: clamp(28px, 4vw, 48px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.02);
}
.zl-pblock-header {
  border-bottom: 1px solid #f1f5f9;
  padding-bottom: 14px;
  margin-bottom: 24px;
}
.zl-pblock-tag {
  font-size: 11px;
  font-weight: 800;
  letter-spacing: 1.5px;
  color: var(--zl-blue);
  text-transform: uppercase;
  display: block;
  margin-bottom: 4px;
}
.zl-pblock-header h2 {
  font-size: 20px;
  font-weight: 800;
  color: #0f172a;
  margin: 0;
  border-left: 4px solid var(--zl-red);
  padding-left: 10px;
}
.zl-pblock-header p {
  color: #64748b;
  font-size: 13px;
  margin: 6px 0 0 14px;
}

/* Advantage Cards Grid (4 Columns) */
.zl-advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin-bottom: 28px;
}
.zl-adv-card {
  background: #f8fafc;
  border: 1px solid var(--zl-border);
  border-top: 3px solid var(--zl-blue);
  border-radius: 4px;
  padding: 20px;
}
.zl-adv-num {
  font-size: 18px;
  font-weight: 900;
  color: #cbd5e1;
  margin-bottom: 8px;
}
.zl-adv-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: #1e293b;
  margin: 0 0 8px 0;
}
.zl-adv-card p {
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
  margin: 0;
}
.zl-pblock-body-text {
  font-size: 14px;
  line-height: 1.8;
  color: #334155;
}
.zl-pblock-body-text h4 {
  font-size: 16px;
  font-weight: 700;
  color: #0f172a;
  margin: 20px 0 8px 0;
}
.zl-pblock-body-text ul {
  padding-left: 20px;
  margin: 8px 0 16px 0;
}
.zl-pblock-body-text li {
  margin-bottom: 6px;
}

/* Tables */
.zl-table-wrapper {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 20px 0;
}
.zl-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
  text-align: left;
}
.zl-table th {
  background: #f1f5f9;
  color: #1e293b;
  font-weight: 700;
  padding: 12px 16px;
  border: 1px solid var(--zl-border);
}
.zl-table td {
  padding: 10px 16px;
  border: 1px solid var(--zl-border);
  color: #475569;
}
.zl-table tr:nth-child(even) td {
  background: #f8fafc;
}

/* Installation Flow */
.zl-install-flow {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 10px;
}
.zl-if-step {
  background: #f8fafc;
  border: 1px solid var(--zl-border);
  border-radius: 4px;
  padding: 18px 14px;
  text-align: center;
}
.zl-if-num {
  font-size: 11px;
  font-weight: 800;
  color: var(--zl-blue);
  margin-bottom: 6px;
  letter-spacing: 1px;
}
.zl-if-step h4 {
  font-size: 14px;
  font-weight: 700;
  color: #0f172a;
  margin: 0 0 6px 0;
}
.zl-if-step p {
  font-size: 12px;
  color: #64748b;
  line-height: 1.5;
  margin: 0;
}
.zl-if-arrow {
  color: #94a3b8;
  font-size: 20px;
  font-weight: bold;
}

/* Quality Testing Grid */
.zl-quality-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}
.zl-qitem {
  background: #f8fafc;
  border: 1px solid var(--zl-border);
  border-radius: 4px;
  padding: 16px 20px;
}
.zl-qitem strong {
  display: block;
  font-size: 14px;
  color: #0f172a;
  margin-bottom: 4px;
}
.zl-qitem p {
  font-size: 13px;
  color: #64748b;
  margin: 0;
  line-height: 1.6;
}

/* Footer */
.zl-footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 60px 0 24px;
  font-size: 13px;
}
.zl-footer-row {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  margin-bottom: 40px;
}
.zl-footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  color: #ffffff;
  margin: 0 0 18px 0;
  border-left: 3px solid var(--zl-red);
  padding-left: 10px;
}
.zl-footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.zl-footer-links li {
  margin-bottom: 10px;
}
.zl-footer-links a {
  color: #94a3b8;
  text-decoration: none;
  transition: color 0.2s;
}
.zl-footer-links a:hover {
  color: #ffffff;
}
.zl-footer-contact p {
  margin: 0 0 10px 0;
  line-height: 1.6;
}
.zl-footer-phone {
  color: #38bdf8;
  font-size: 18px;
  font-weight: 800;
}
.zl-cert-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 14px;
}
.zl-cert-badges span {
  background: #1e293b;
  color: #cbd5e1;
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 2px;
}
.zl-footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  text-align: center;
  color: #64748b;
  font-size: 12px;
}
.zl-footer-bottom p {
  margin: 4px 0;
}

/* ==========================================================================
   Full Responsive Media Queries
   ========================================================================== */

/* Tablet Breakpoint (max-width: 1024px) */
@media (max-width: 1024px) {
  .zl-hero h1 { font-size: 34px; }
  .zl-pillars-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .zl-product-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .zl-factory-split { grid-template-columns: 1fr; gap: 32px; }
  .zl-news-split { grid-template-columns: 1fr; gap: 32px; }
  .zl-rfq-form-grid { grid-template-columns: 1fr 1fr; }
  .zl-footer-row { grid-template-columns: 1fr 1fr; gap: 36px; }
  .zl-prod-hero-card { grid-template-columns: 1fr; gap: 32px; }
  .zl-advantage-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .zl-install-flow { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .zl-if-arrow { display: none; }
}

/* Mobile & Small Tablet Breakpoint (max-width: 991px) */
@media (max-width: 991px) {
  .zl-header-inner {
    height: 64px;
    position: relative;
    padding: 0 16px;
  }
  .zl-logo-img {
    max-height: 40px;
  }
  .zl-mobile-toggle {
    display: flex;
  }
  .zl-nav-wrap {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    width: 100%;
    background: #ffffff;
    flex-direction: column;
    padding: 12px 20px 24px;
    box-shadow: 0 16px 32px rgba(15, 23, 42, 0.12);
    border-bottom: 3px solid var(--zl-blue);
    border-top: 1px solid #e2e8f0;
    z-index: 1002;
  }
  .zl-nav-wrap.active {
    display: flex;
    animation: zlFadeSlideDown 0.25s ease-out forwards;
  }
  @keyframes zlFadeSlideDown {
    from {
      opacity: 0;
      transform: translateY(-8px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  .zl-nav {
    flex-direction: column;
    width: 100%;
    gap: 0;
  }
  .zl-nav li {
    width: 100%;
    border-bottom: 1px solid #f1f5f9;
  }
  .zl-nav li a {
    height: 48px;
    line-height: 48px;
    padding: 0 8px;
    font-size: 15px;
    font-weight: 600;
    color: #1e293b;
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  .zl-nav li a::after {
    display: none;
  }
  .zl-nav li.active a {
    color: var(--zl-blue);
    font-weight: 800;
  }
  .zl-header-cta {
    margin: 16px 0 0 0;
    width: 100%;
  }
  .zl-header-cta a {
    display: block;
    text-align: center;
    width: 100%;
    padding: 13px 0;
    font-size: 14px;
    font-weight: 700;
    border-radius: 4px;
    box-sizing: border-box;
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.2);
  }
}

/* Smartphone Breakpoint (max-width: 640px) */
@media (max-width: 640px) {
  .zl-container {
    padding: 0 16px;
  }
  .zl-topbar {
    font-size: 11px;
    padding: 6px 0;
  }
  .zl-topbar-inner {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }
  .zl-topbar-left, .zl-topbar-right {
    justify-content: center;
    gap: 6px;
    font-size: 11px;
  }
  .zl-topbar-left span:not(:first-child) {
    display: none;
  }
  .zl-topbar-right span.zl-divider:first-of-type {
    display: none;
  }

  /* Hero */
  .zl-hero {
    padding: 48px 0 56px;
  }
  .zl-hero h1 {
    font-size: 26px;
    line-height: 1.3;
    margin-bottom: 12px;
  }
  .zl-hero p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 20px;
  }
  .zl-hero-btns {
    flex-direction: column;
    gap: 12px;
    width: 100%;
  }
  .zl-hero-btns .zl-btn {
    width: 100%;
    text-align: center;
    padding: 13px 18px;
    box-sizing: border-box;
  }

  /* 4 Pillars Dashboard (2x2 Grid) */
  .zl-pillars-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px 12px;
    padding: 20px 14px;
  }
  .zl-pillar-item {
    padding-left: 10px;
    border-left-width: 3px;
  }
  .zl-pillar-item .zl-num {
    font-size: 22px;
    margin-bottom: 2px;
  }
  .zl-pillar-item strong {
    font-size: 12px;
  }
  .zl-pillar-item p {
    font-size: 10.5px;
    line-height: 1.35;
  }

  /* Product Catalog Grid */
  .zl-product-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .zl-factory-imgs {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* Product Detail Page */
  .zl-prod-hero-section {
    padding: 20px 0 32px;
  }
  .zl-prod-hero-card {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .zl-prod-main-img {
    height: 280px;
  }
  .zl-prod-trust-points {
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    padding: 10px 8px;
  }
  .zl-pt-item strong {
    font-size: 11px;
    letter-spacing: -0.2px;
  }
  .zl-pt-item p {
    font-size: 9.5px;
  }
  .zl-prod-main-title {
    font-size: 22px;
    line-height: 1.3;
  }
  .zl-prod-pricing-strip {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    padding: 12px;
  }
  .zl-prod-quick-specs {
    padding: 10px 12px;
  }
  .zl-qs-row {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 6px 0;
  }
  .zl-prod-cta-actions {
    flex-direction: column;
    gap: 10px;
    width: 100%;
  }
  .zl-btn-cta-phone, .zl-btn-cta-sample {
    width: 100%;
    justify-content: center;
    box-sizing: border-box;
    padding: 12px 16px;
  }

  /* Tabs Bar */
  .zl-prod-tabs-section {
    padding: 0 0 50px;
  }
  .zl-prod-nav-bar {
    top: 64px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    margin-bottom: 24px;
  }
  .zl-prod-nav-bar::-webkit-scrollbar {
    display: none;
  }
  .zl-pnav-link {
    padding: 13px 18px;
    font-size: 13.5px;
  }
  .zl-pblock, .zl-spec-card, .zl-article-container {
    padding: 24px 16px;
    margin-bottom: 24px;
    border-radius: 6px;
  }
  .zl-advantage-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }
  .zl-install-flow {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* Tables: Fluid Touch Scroll */
  .zl-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--zl-border);
    border-radius: 4px;
  }
  .zl-table {
    min-width: 580px;
    font-size: 12.5px;
  }
  .zl-table th, .zl-table td {
    padding: 8px 10px;
  }

  /* Forms & Footer */
  .zl-rfq-form-grid {
    grid-template-columns: 1fr;
  }
  .zl-rfq-submit-row {
    flex-direction: column;
  }
  .zl-btn-rfq {
    width: 100%;
    text-align: center;
  }
  .zl-footer-row {
    grid-template-columns: 1fr;
    gap: 28px;
  }
}