/* ========================================
   SJT - Main Stylesheet
   Modern Responsive Redesign
   Metallic Tech Feel
   ======================================== */

/* CSS Variables - Theme */
:root {
  /* Primary Colors - Deep Red + Warm Brown */
  --color-primary: #990000;
  --color-primary-dark: #6B0000;
  --color-primary-light: #CC2222;
  --color-secondary: #D9C4A4;
  --color-secondary-dark: #C4A880;
  --color-accent: #FF9900;
  --color-hover-bg: #CC8800;
  --color-hover-text: #FFFF99;

  /* Metallic/Tech Colors */
  --color-dark: #333333;
  --color-darker: #222222;
  --color-charcoal: #4A4A4A;
  --color-silver: #C0C0C0;
  --color-silver-light: #E8E8E8;
  --color-silver-dark: #A9A9A9;

  /* Background Colors */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F5F5;
  --color-bg-dark: #333333;

  /* Text Colors */
  --color-text: #666666;
  --color-text-dark: #333333;
  --color-text-light: #999999;
  --color-text-inverse: #FFFFFF;

  /* Border Colors */
  --color-border: #E0E0E0;
  --color-border-dark: #CCCCCC;

  /* Typography */
  --font-family: Arial, Helvetica, sans-serif;
  --font-size-xs: 10px;
  --font-size-sm: 12px;
  --font-size-base: 14px;
  --font-size-lg: 16px;
  --font-size-xl: 18px;
  --font-size-2xl: 24px;
  --font-size-3xl: 32px;

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;

  /* Layout */
  --container-max: 1200px;
  --sidebar-width: 210px;
  --header-height: 50px;
  --nav-height: 52px;

  /* Effects */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
  --shadow-inset: inset 0 1px 2px rgba(0,0,0,0.1);
  --transition: all 0.3s ease;
}

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

html {
  font-size: var(--font-size-base);
  line-height: 1.6;
  overflow-x: hidden;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* Utility Classes */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-md);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  border: 0;
}

/* Metallic Effects */
.metallic-border {
  border: 1px solid var(--color-silver);
  border-top-color: var(--color-silver-light);
  border-left-color: var(--color-silver-light);
}

.metallic-gradient {
  background: linear-gradient(135deg, var(--color-silver-light) 0%, var(--color-silver) 50%, var(--color-silver-dark) 100%);
}

/* ========================================
   TOP BAR
   ======================================== */

.top-bar {
  background-color: var(--color-secondary);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border-dark);
}

.top-bar-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-lg);
}

.top-logo img {
  height: auto;
}

.top-search .search-form {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.search-label {
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.search-input {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border-dark);
  border-radius: 2px;
  font-size: var(--font-size-sm);
  width: 160px;
}

.search-btn {
  padding: var(--space-xs) var(--space-md);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: 2px;
  font-size: var(--font-size-sm);
  cursor: pointer;
  transition: var(--transition);
}

.search-btn:hover {
  background-color: var(--color-primary-dark);
}

/* ========================================
   HEADER & NAVIGATION
   ======================================== */

.site-header {
  background-color: var(--color-primary);
  border-bottom: 2px solid var(--color-silver);
  height: var(--nav-height);
  min-height: var(--nav-height);
  position: relative;
}

.main-nav {
  display: flex;
  justify-content: center;
  height: 100%;
}

.nav-list {
  display: flex;
  gap: var(--space-lg);
}

.nav-list > li > a {
  display: block;
  padding: 12px var(--space-sm) 6px;
  color: var(--color-text-inverse);
  font-size: var(--font-size-lg);
  font-weight: bold;
  line-height: 1.2;
  text-decoration: none;
  transition: var(--transition);
}

.nav-list > li > a:hover,
.nav-list > li > a.active {
  color: var(--color-accent);
  text-decoration: none;
}

/* Dropdown */
.has-dropdown {
  position: relative;
}

.submenu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 180px;
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary-dark);
  box-shadow: var(--shadow-md);
  z-index: 100;
}

.submenu.is-open {
  display: block;
}

.submenu li a {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-text-inverse);
  font-size: var(--font-size-lg);
  border-bottom: 1px solid var(--color-primary-dark);
}

.submenu li a:hover {
  background-color: var(--color-hover-bg);
  color: var(--color-hover-text);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  padding: 0;
}

.menu-toggle span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-text-inverse);
  transition: var(--transition);
}

.menu-toggle.is-active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}

.menu-toggle.is-active span:nth-child(2) {
  opacity: 0;
}

.menu-toggle.is-active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ========================================
   MOBILE MENU PANEL
   ======================================== */

.mobile-menu-panel {
  display: none;
  position: fixed;
  top: 0;
  left: -100%;
  width: 85%;
  max-width: 320px;
  height: 100vh;
  background-color: var(--color-bg);
  z-index: 1000;
  overflow-y: auto;
  transition: left 0.3s ease;
  box-shadow: var(--shadow-lg);
}

.mobile-menu-panel.is-open {
  display: flex;
  flex-direction: column;
  left: 0;
}

/* Mobile Overlay */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 999;
}

.mobile-menu-overlay.is-open {
  display: block;
}

.mobile-menu-header {
  display: flex;
  background-color: var(--color-primary);
  padding: var(--space-sm) var(--space-md);
  gap: var(--space-md);
  position: sticky;
  top: 0;
  z-index: 1;
}

.mobile-quick-link {
  color: var(--color-text-inverse);
  font-size: var(--font-size-sm);
  font-weight: bold;
  text-decoration: none;
  padding: var(--space-xs) var(--space-sm);
  background-color: rgba(255,255,255,0.1);
  border-radius: 4px;
}

.mobile-quick-link:hover {
  background-color: rgba(255,255,255,0.2);
}

.mobile-menu-content {
  flex: 1;
  padding: var(--space-md);
}

.mobile-category {
  margin-bottom: var(--space-lg);
}

.mobile-category-title {
  font-size: var(--font-size-base);
  font-weight: bold;
  color: var(--color-primary);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-primary);
  margin-bottom: var(--space-sm);
}

.mobile-category-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.mobile-category-list li {
  padding: var(--space-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

.mobile-category-list li a {
  color: var(--color-text-dark);
  text-decoration: none;
  font-size: var(--font-size-sm);
}

.mobile-category-list li a:hover {
  color: var(--color-primary);
}

/* ========================================
   BANNER
   ======================================== */

.site-banner {
  width: 100%;
  background-color: var(--color-darker);
}

.banner-image {
  width: 100%;
  max-height: 120px;
  object-fit: cover;
  display: block;
  margin: 0 auto;
}

/* ========================================
   MAIN LAYOUT
   ======================================== */

.main-layout {
  padding: var(--space-lg) 0;
  background-color: var(--color-bg-alt);
}

.layout-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  align-items: flex-start;
}

/* ========================================
   SIDEBAR
   ======================================== */

.sidebar {
  flex: 0 0 var(--sidebar-width);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-dark);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  position: relative;
}

.sidebar-section {
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
}

.sidebar-section:last-of-type {
  border-bottom: none;
}

.sidebar-title {
  font-size: var(--font-size-base);
  font-weight: bold;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-silver);
}

.sidebar-menu li {
  margin-bottom: var(--space-xs);
}

.sidebar-menu li a {
  display: block;
  padding: var(--space-xs) var(--space-sm);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: var(--transition);
}

.sidebar-menu li a:hover {
  background-color: var(--color-bg-alt);
  color: var(--color-primary);
  text-decoration: none;
}

/* Sidebar Toggle (Tablet) */
.sidebar-toggle {
  position: absolute;
  right: -20px;
  top: 50%;
  transform: translateY(-50%);
  width: 20px;
  height: 40px;
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
  border-radius: 0 4px 4px 0;
  cursor: pointer;
  display: none;
}

/* ========================================
   MAIN CONTENT
   ======================================== */

.main-content {
  flex: 1;
  min-width: 0;
  background-color: var(--color-bg);
  border: 1px solid var(--color-border-dark);
  border-radius: 4px;
  box-shadow: var(--shadow-sm);
  padding: var(--space-lg);
}

.content-area {
  min-height: 400px;
}

.page-title {
  font-size: var(--font-size-2xl);
  font-weight: bold;
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-silver);
  text-align: center;
}

/* Home Banner */
.home-banner {
  width: 100%;
  height: auto;
  margin-bottom: var(--space-md);
  background-size: cover;
  background-position: center;
}

.banner-img-responsive {
  width: 100%;
  max-width: 566px;
  height: auto;
  display: block;
}

/* User Center */
.user-center {
  background-color: #FEEEE9;
  border: 1px solid var(--color-border);
  padding: var(--space-sm) var(--space-md);
  margin-bottom: var(--space-md);
  border-radius: 2px;
}

.user-center-form {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-sm);
}

.user-center-label {
  font-weight: bold;
  color: #CC6600;
  margin-right: var(--space-sm);
}

.user-center-form label {
  color: var(--color-text);
  font-size: var(--font-size-sm);
}

.input-border {
  padding: var(--space-xs) var(--space-sm);
  border: 1px solid var(--color-border-dark);
  border-radius: 2px;
  font-size: var(--font-size-sm);
}

.btn-signin,
.btn-register {
  padding: var(--space-xs) var(--space-md);
  font-size: var(--font-size-sm);
  border-radius: 2px;
  cursor: pointer;
  transition: var(--transition);
}

.btn-signin {
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border: none;
}

.btn-signin:hover {
  background-color: var(--color-primary-dark);
}

.btn-register {
  background-color: var(--color-bg);
  color: var(--color-text-dark);
  border: 1px solid var(--color-border-dark);
}

.btn-register:hover {
  background-color: var(--color-bg-alt);
}

/* Home Sections */
.home-section {
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.home-section:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.section-header {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-xs);
  border-bottom: 2px solid var(--color-silver);
}

.section-header h2 {
  font-size: var(--font-size-lg);
  color: var(--color-text-dark);
  margin: 0;
  padding: 0;
  border: none;
}

.section-icon {
  width: 76px;
  height: 76px;
  object-fit: contain;
}

/* News Items */
.news-items {
  display: flex;
  flex-direction: column;
}

.news-item {
  padding: var(--space-md);
  background-color: #F9F9F9;
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.news-item:last-child {
  border-bottom: none;
}

.news-item a {
  color: var(--color-primary);
  font-size: var(--font-size-lg);
}

.news-item a:hover {
  color: var(--color-primary-light);
}

/* Offer Content */
.offer-content {
  background-color: #F6F6F6;
  padding: var(--space-lg);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.offer-title {
  font-size: var(--font-size-lg);
  font-weight: bold;
  color: var(--color-text-dark);
  margin-bottom: var(--space-lg);
}

.offer-product-img {
  width: 100%;
  max-width: 566px;
  height: auto;
  border: 1px solid #000000;
  display: block;
  margin: 0 auto;
}

/* ========================================
   FOOTER
   ======================================== */

.site-footer {
  background-color: var(--color-dark);
  color: var(--color-text-inverse);
  padding: var(--space-xl) 0;
  margin-top: var(--space-xl);
}

.footer-grid {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--space-lg);
}

.footer-links {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
}

.footer-links a {
  color: var(--color-text-inverse);
  font-size: var(--font-size-sm);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-contact {
  text-align: center;
}

.footer-contact a {
  color: var(--color-accent);
}

.footer-copyright {
  text-align: right;
  font-size: var(--font-size-sm);
  color: var(--color-silver);
}

/* ========================================
   CONTENT BLOCK
   ======================================== */

.content-block {
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.content-block:last-child {
  border-bottom: none;
}

.content-block h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  text-align: center;
}

.content-block p {
  margin-bottom: var(--space-md);
  line-height: 1.8;
  color: var(--color-text);
}

/* ========================================
   BREADCRUMB BAR
   ======================================== */

.breadcrumb-bar {
  background-color: var(--color-bg-alt);
  padding: var(--space-md) 0;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  font-size: var(--font-size-sm);
  color: var(--color-text);
  min-width: 0;
}

.breadcrumb a,
.breadcrumb strong {
  min-width: 0;
  flex-shrink: 1;
}

.breadcrumb a {
  color: var(--color-primary);
}

.breadcrumb strong {
  color: var(--color-text-dark);
}

/* ========================================
   NEWS LIST PAGE
   ======================================== */

.news-list-page {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.news-item {
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.news-item h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
}

.news-item h3 a {
  color: var(--color-primary);
}

.news-item h3 a:hover {
  color: var(--color-primary-light);
}

.news-meta {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  margin-bottom: var(--space-sm);
}

.news-excerpt {
  color: var(--color-text);
  line-height: 1.6;
}

/* Download List */
.download-list {
  list-style: disc;
  padding-left: var(--space-xl);
}

.download-list li {
  margin-bottom: var(--space-sm);
  padding: var(--space-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.download-list li:last-child {
  border-bottom: none;
}

.download-list a {
  color: var(--color-primary);
  font-size: var(--font-size-base);
}

.download-list a:hover {
  color: var(--color-primary-light);
}

/* FAQ Section */
.faq-section {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.faq-item {
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.faq-item:last-child {
  border-bottom: none;
}

.faq-item h3 {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.faq-item p {
  color: var(--color-text);
  line-height: 1.8;
}

/* Sitemap Section */
.sitemap-section {
  margin-bottom: var(--space-xl);
}

.sitemap-section h2 {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 1px solid var(--color-border);
}

.sitemap-list {
  list-style: disc;
  padding-left: var(--space-xl);
}

.sitemap-list li {
  margin-bottom: var(--space-sm);
}

.sitemap-list a {
  color: var(--color-text);
}

.sitemap-list a:hover {
  color: var(--color-primary);
}

/* Contact Section */
.contact-section {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.contact-info {
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.contact-info h3 {
  font-size: var(--font-size-base);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
}

.contact-info p {
  margin-bottom: var(--space-sm);
  color: var(--color-text);
}

/* ========================================
   PRODUCT LIST
   ======================================== */

.product-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  margin-bottom: var(--space-xl);
}

.product-item {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-lg);
  padding: var(--space-lg);
  background-color: var(--color-bg);
  border-radius: 4px;
  transition: var(--transition);
}

.product-item:hover {
  box-shadow: var(--shadow-md);
}

.product-image img {
  width: 120px;
  height: 160px;
  object-fit: cover;
  border: 1px solid var(--color-border-dark);
}

.product-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.product-name {
  font-size: var(--font-size-lg);
  font-weight: bold;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.product-description {
  color: var(--color-text);
  margin-bottom: var(--space-md);
  line-height: 1.6;
}

.product-link {
  display: inline-block;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-primary);
  color: var(--color-text-inverse);
  border-radius: 2px;
  font-size: var(--font-size-sm);
  transition: var(--transition);
}

.product-link:hover {
  background-color: var(--color-primary-dark);
  text-decoration: none;
}

/* ========================================
   PRODUCT DETAIL
   ======================================== */

/* 产品详情主容器 */
.product-detail {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-xl);
  align-items: flex-start;
  margin-bottom: var(--space-xl);
}

.detail-gallery {
  /* normal flow - no sticky */
}

.detail-main-image {
  width: 100%;
  max-width: 300px;
  height: auto;
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.detail-info {
  overflow-wrap: break-word;
  word-wrap: break-word;
}

.detail-info h2 {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-sm);
  border-bottom: 2px solid var(--color-silver);
}

/* 产品参数列表（横向2列：标签|值） */
.specs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.specs-item {
  display: flex;
  width: 100%;
  border-bottom: 1px solid var(--color-border);
}

.specs-item:last-child {
  border-bottom: none;
}

.specs-item:nth-child(odd) {
  background-color: #fff;
}

.specs-item:nth-child(even) {
  background-color: #fafafa;
}

.specs-label {
  display: block;
  min-width: 140px;
  max-width: 140px;
  padding: var(--space-sm);
  font-weight: bold;
  color: var(--color-primary);
  background-color: var(--color-bg-alt);
  border-right: 1px solid var(--color-border);
  flex-shrink: 0;
}

.specs-value {
  display: block;
  flex: 1;
  padding: var(--space-sm);
  color: var(--color-text);
  word-wrap: break-word;
  overflow-wrap: break-word;
}

/* 产品描述 */
.detail-description {
  margin-bottom: var(--space-md);
  line-height: 1.8;
}

.detail-description p {
  margin-bottom: var(--space-sm);
}

/* 询价区块 */
.inquiry-section {
  padding: var(--space-md);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.inquiry-section p {
  margin: 0;
}

/* Responsive Table Wrapper */
.table-responsive {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: var(--space-md);
}

/* Inquiry Section */
.inquiry-section {
  padding: var(--space-lg);
  background-color: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  border-radius: 4px;
}

.inquiry-section p {
  color: var(--color-text);
  margin: 0;
}

.inquiry-section a {
  color: var(--color-primary);
}

/* ========================================
   RESPONSIVE STYLES
   ======================================== */

/* Tablet (768px - 1024px) */
@media (min-width: 768px) and (max-width: 1024px) {
  .layout-inner {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .layout-inner > .sidebar {
    flex: 0 0 180px;
  }

  .layout-inner > .main-content {
    flex: 1 1 calc(100% - 180px - var(--space-lg));
  }

  .sidebar-toggle {
    display: block;
  }

  .sidebar.is-collapsed {
    width: 0;
    overflow: hidden;
    border: none;
  }

  .sidebar.is-collapsed .sidebar-section,
  .sidebar.is-collapsed .sidebar-toggle {
    display: none;
  }

  .sidebar-toggle {
    right: -20px;
  }

  .product-detail {
    flex-direction: row;
  }

  .contact-section {
    flex-direction: column;
  }

  .footer-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-lg);
  }

  .footer-grid > * {
    flex: 1 1 calc(50% - var(--space-lg));
    min-width: 200px;
  }

  .footer-copyright {
    flex: 1 1 100%;
    text-align: center;
  }
}

/* Mobile (< 768px) */
@media (max-width: 767px) {
  main {
    unicode-bidi: normal;
  }

  .top-bar-inner {
    flex-direction: column;
    gap: var(--space-md);
  }

  .top-search .search-form {
    width: 100%;
  }

  .search-input {
    width: 100%;
  }

  .menu-toggle {
    display: flex;
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
  }

  .main-nav {
    display: none;
    flex-direction: column;
    position: absolute;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background-color: var(--color-primary);
    z-index: 99;
    max-height: calc(100vh - var(--nav-height));
    overflow-y: auto;
  }

  .main-nav.is-open {
    display: flex;
  }

  .main-nav .nav-list {
    flex-direction: column;
    width: 100%;
    padding: var(--space-sm) 0;
  }

  .main-nav .nav-list > li > a {
    padding: var(--space-md);
    border-bottom: 1px solid rgba(255,255,255,0.2);
  }

  .nav-list {
    flex-direction: column;
    width: 100%;
    padding: var(--space-md);
  }

  .nav-list > li > a {
    padding: var(--space-md);
    border-bottom: 1px solid rgba(255,255,255,0.2);
  }

  .has-dropdown .submenu {
    position: static;
    box-shadow: none;
    border: none;
    background-color: var(--color-primary);
  }

  .has-dropdown .submenu.is-open {
    display: block;
  }

  .submenu li a {
    padding-left: var(--space-xl);
    color: var(--color-text-inverse);
    border-bottom: 1px solid var(--color-primary-dark);
  }

  .layout-inner {
    flex-direction: column;
    flex-wrap: nowrap;
    width: 100%;
  }

  .layout-inner > .sidebar {
    flex: 0 0 auto;
    width: 100%;
  }

  .layout-inner > .main-content {
    flex: 1 1 auto;
    width: 100%;
    min-width: 0;
    max-width: 100%;
  }

  .sidebar {
    display: none;
  }

  .sidebar.is-open {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    width: 280px;
    height: 100vh;
    z-index: 200;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
  }

  .sidebar-toggle {
    display: none;
  }

  .product-item {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }

  .product-image img {
    margin: 0 auto;
  }

  .footer-grid {
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: var(--space-md);
  }

  .footer-links {
    flex-direction: column;
    gap: var(--space-sm);
  }

  .footer-copyright {
    text-align: center;
  }

  .page-title {
    font-size: var(--font-size-xl);
    word-wrap: break-word;
    overflow-wrap: break-word;
    overflow-x: hidden;
  }

  /* Product Detail Mobile */
  .product-detail {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
  }

  .detail-gallery {
    position: static;
    text-align: center;
    margin-bottom: var(--space-md);
  }

  .detail-main-image {
    max-width: 100%;
  }

  .specs-list {
    border: none;
    border-radius: 0;
    gap: 1px;
    background-color: var(--color-border);
  }

  .specs-item {
    flex-direction: column;
    border-radius: 4px;
    overflow: hidden;
  }

  .specs-label {
    max-width: 100%;
    min-width: auto;
    border-right: none;
    border-bottom: none;
    background-color: var(--color-primary);
    color: #fff;
    padding: var(--space-xs) var(--space-sm);
  }

  .specs-value {
    padding: var(--space-xs) var(--space-sm);
    background-color: #fff;
  }

  .detail-info h2 {
    font-size: var(--font-size-xl);
    word-wrap: break-word;
    overflow-wrap: break-word;
    line-height: 1.3;
  }

  .detail-description {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .detail-content {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .detail-content table {
    font-size: var(--font-size-sm);
  }

  .detail-content td,
  .detail-content th {
    padding: var(--space-xs) var(--space-sm);
  }

  /* Better Image Handling */
  .detail-content img {
    max-width: 100%;
    height: auto;
  }

  .table-responsive {
    margin-bottom: var(--space-sm);
  }

  .inquiry-section {
    padding: var(--space-md);
  }

  /* Mobile Typography Improvements */
  .main-content {
    padding: var(--space-md);
  }

  .content-block h2 {
    font-size: var(--font-size-lg);
  }

  .content-block p {
    font-size: var(--font-size-sm);
    line-height: 1.6;
  }

  /* FAQ/Contact Mobile */
  .faq-item h3 {
    font-size: var(--font-size-base);
  }

  .faq-item p {
    font-size: var(--font-size-sm);
  }

  /* News Item Mobile */
  .news-item h3 {
    font-size: var(--font-size-base);
  }

  .news-meta {
    font-size: var(--font-size-xs);
  }

  .news-excerpt {
    font-size: var(--font-size-sm);
  }

  /* Product List Mobile */
  .product-list {
    gap: var(--space-md);
  }

  .product-item {
    padding: var(--space-md);
  }

  .product-name {
    font-size: var(--font-size-base);
  }

  .product-description {
    font-size: var(--font-size-sm);
  }

  /* Contact Section Mobile */
  .contact-section {
    flex-direction: column;
  }

  .contact-info {
    padding: var(--space-md);
  }

  .contact-info h3 {
    font-size: var(--font-size-sm);
  }

  .contact-info p {
    font-size: var(--font-size-sm);
  }

  /* Home Page Mobile */
  .home-banner {
    margin-bottom: var(--space-sm);
  }

  .banner-img-responsive {
    max-width: 100%;
  }

  .user-center {
    padding: var(--space-sm);
  }

  .user-center-form {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-xs);
  }

  .user-center-label {
    margin-right: 0;
    margin-bottom: var(--space-xs);
  }

  .user-center-form label {
    display: none;
  }

  .user-center-form .input-border {
    width: 100%;
  }

  .btn-signin,
  .btn-register {
    width: 100%;
    padding: var(--space-sm);
    text-align: center;
  }

  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }

  .section-icon {
    width: 48px;
    height: 48px;
  }

  .news-item {
    padding: var(--space-sm);
    font-size: var(--font-size-xs);
    line-height: 1.5;
  }

  .offer-content {
    padding: var(--space-sm);
  }

  .offer-title {
    font-size: var(--font-size-sm);
  }

  .offer-product-img {
    max-width: 100%;
  }
}

/* ========================================
   PRODUCT DETAIL TABLE IMPROVEMENTS
   ======================================== */

.detail-content table {
  width: 100%;
  max-width: 100%;
  font-size: var(--font-size-base);
  line-height: 1.6;
}

.detail-content table td {
  padding: var(--space-sm) var(--space-md);
  vertical-align: top;
  word-wrap: break-word;
  overflow-wrap: break-word;
  max-width: 0;
}

.detail-content table td[align="center"] img {
  max-width: 100%;
  height: auto;
  display: block;
  margin: 0 auto;
}

.detail-content table td[align="right"] {
  text-align: right;
}

.detail-content table tr bgcolor {
  background-color: #F6F6F6;
}

.detail-content table tr:hover {
  background-color: #f9f9f9;
}

/* Improve nested tables */
.detail-content table table {
  margin: var(--space-md) 0;
  background-color: #fff;
}

.detail-content table table td {
  font-size: var(--font-size-sm);
}

/* MsoNormalTable improvements */
.MsoNormalTable {
  font-size: var(--font-size-sm) !important;
}

.MsoNormalTable td,
.MsoNormalTable th {
  padding: var(--space-xs) var(--space-sm) !important;
}

/* Line height fix */
.lineheight {
  line-height: 1.8 !important;
}

/* Table responsive wrapper improvements */
.table-responsive {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin-bottom: var(--space-md);
}

.table-responsive table {
  width: 100%;
  max-width: 600px;
}