/* ============================================================
   正多能源 (Zhengduo Energy) - Oil Drilling Equipment
   Modern Industrial Design | No External Dependencies
   ============================================================ */

/* ----------------------------------------------------------
   1. CSS Custom Properties (Variables)
   ---------------------------------------------------------- */
:root {
  /* Colors */
  --color-primary:       #1a365d;
  --color-primary-light: #2a4a7f;
  --color-primary-dark:  #0f2340;
  --color-accent:        #e8590c;
  --color-accent-light:  #f97316;
  --color-accent-dark:   #c2410c;
  --color-bg-light:      #f7fafc;
  --color-bg-white:      #ffffff;
  --color-text:          #2d3748;
  --color-text-light:    #4a5568;
  --color-text-muted:    #718096;
  --color-border:        #e2e8f0;
  --color-border-light:  #edf2f7;
  --color-footer-bg:     #1a2332;
  --color-footer-text:   #a0aec0;
  --color-overlay:       rgba(26, 54, 93, 0.75);
  --color-overlay-dark:  rgba(0, 0, 0, 0.55);

  /* Spacing */
  --space-xs:   0.25rem;   /* 4px  */
  --space-sm:   0.5rem;    /* 8px  */
  --space-md:   1rem;      /* 16px */
  --space-lg:   1.5rem;    /* 24px */
  --space-xl:   2rem;      /* 32px */
  --space-2xl:  3rem;      /* 48px */
  --space-3xl:  4rem;      /* 64px */
  --space-4xl:  6rem;      /* 96px */

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
  --font-size-xs:   0.75rem;
  --font-size-sm:   0.875rem;
  --font-size-base: 1rem;
  --font-size-lg:   1.125rem;
  --font-size-xl:   1.25rem;
  --font-size-2xl:  1.5rem;
  --font-size-3xl:  1.875rem;
  --font-size-4xl:  2.25rem;
  --font-size-5xl:  3rem;

  /* Layout */
  --container-max:  1200px;
  --header-height:  110px;
  --border-radius:  6px;
  --border-radius-lg: 12px;

  /* Transitions */
  --transition-fast:   0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow:   0.5s ease;

  /* Shadows */
  --shadow-sm:    0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md:    0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg:    0 10px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl:    0 20px 50px rgba(0, 0, 0, 0.15);
  --shadow-header: 0 2px 20px rgba(0, 0, 0, 0.08);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

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

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

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

ul, ol {
  list-style: none;
}

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

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-primary);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-3xl); }
h3 { font-size: var(--font-size-2xl); }
h4 { font-size: var(--font-size-xl); }
h5 { font-size: var(--font-size-lg); }
h6 { font-size: var(--font-size-base); }

p {
  margin-bottom: var(--space-md);
  color: var(--color-text-light);
}

/* ----------------------------------------------------------
   3. Container
   ---------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: var(--space-lg);
  padding-right: var(--space-lg);
}

/* ----------------------------------------------------------
   4. Header
   ---------------------------------------------------------- */

/* --- 4a. Header Top Bar --- */
.header-top {
  background-color: var(--color-primary-dark);
  color: #fff;
  font-size: var(--font-size-sm);
  padding: var(--space-xs) 0;
  line-height: 1.8;
}

.header-top-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
}

.header-top-left .company-name {
  font-weight: 600;
  letter-spacing: 1px;
}

.header-top-right {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}

.header-top-right span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.header-top-right svg {
  flex-shrink: 0;
}

.header-top-right .sep {
  opacity: 0.3;
  margin: 0 4px;
}

.header-top a {
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition-fast);
}

.header-top a:hover {
  color: #fff;
}

.header-top-left,
.header-top-right {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

/* --- 4b. Navbar --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  transition: box-shadow var(--transition-normal);
}

.header.scrolled {
  box-shadow: var(--shadow-header);
}

.navbar {
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border-light);
  padding: var(--space-sm) 0;
  transition: background-color var(--transition-normal), box-shadow var(--transition-normal);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.navbar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  gap: var(--space-lg);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  flex-shrink: 0;
}

.logo img {
  height: 44px;
  width: auto;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .zh {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--color-primary);
}

.logo-text .en {
  font-size: var(--font-size-xs);
  font-weight: 400;
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* --- 4c. Nav Menu --- */
.nav-menu {
  display: flex;
  align-items: center;
  gap: 0;
}

.nav-menu > li {
  position: relative;
}

.nav-menu > li > a {
  display: block;
  padding: var(--space-md) var(--space-lg);
  font-size: var(--font-size-base);
  font-weight: 500;
  color: var(--color-text);
  transition: color var(--transition-fast);
  position: relative;
  white-space: nowrap;
}

.nav-menu > li > a::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 3px 3px 0 0;
  transition: width var(--transition-normal);
}

.nav-menu > li > a:hover,
.nav-menu > li.active > a {
  color: var(--color-accent);
}

.nav-menu > li.active > a::after,
.nav-menu > li > a:hover::after {
  width: 60%;
}

/* --- 4d. Dropdown Menu --- */
.has-dropdown {
  position: relative;
}

.has-dropdown > a::before {
  content: "";
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid currentColor;
  margin-left: var(--space-xs);
  vertical-align: middle;
  transition: transform var(--transition-fast);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 200px;
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border-light);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-normal);
  z-index: 100;
  padding: var(--space-sm) 0;
}

.has-dropdown:hover .dropdown-menu,
.has-dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li a {
  display: block;
  padding: var(--space-sm) var(--space-lg);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.dropdown-menu li a:hover {
  background-color: var(--color-bg-light);
  color: var(--color-accent);
  padding-left: calc(var(--space-lg) + 4px);
}

/* --- 4e. Mobile Menu Toggle --- */
.menu-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  padding: var(--space-sm);
  cursor: pointer;
  z-index: 1001;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-normal);
  margin: 3px 0;
}

.menu-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(4px, 4px);
}

.menu-toggle.active span:nth-child(2) {
  opacity: 0;
  transform: translateX(-10px);
}

.menu-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(4px, -4px);
}

/* ----------------------------------------------------------
   5. Hero Banner / Slider
   ---------------------------------------------------------- */
.hero-slider {
  position: relative;
  width: 100%;
  height: 80vh;
  min-height: 500px;
  max-height: 800px;
  overflow: hidden;
  margin-top: var(--header-height);
}

.hero-slides {
  position: relative;
  width: 100%;
  height: 100%;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  opacity: 0;
  transition: opacity var(--transition-slow);
  z-index: 0;
}

.hero-slide.active {
  opacity: 1;
  z-index: 1;
}

.hero-slide::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    var(--color-overlay) 0%,
    var(--color-overlay-dark) 100%
  );
  z-index: 1;
}

.hero-slide-content {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  text-align: center;
  padding: var(--space-xl);
  color: #fff;
  max-width: 800px;
  margin: 0 auto;
}

.hero-slide-content h1 {
  color: #fff;
  font-size: var(--font-size-5xl);
  font-weight: 800;
  margin-bottom: var(--space-md);
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
  letter-spacing: 1px;
}

.hero-slide-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-2xl);
  max-width: 600px;
  line-height: 1.7;
}

.hero-cta {
  display: inline-block;
  padding: var(--space-md) var(--space-2xl);
  background-color: var(--color-accent);
  color: #fff;
  font-size: var(--font-size-lg);
  font-weight: 600;
  border-radius: var(--border-radius);
  border: 2px solid var(--color-accent);
  transition: all var(--transition-normal);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.hero-cta:hover {
  background-color: transparent;
  color: #fff;
  border-color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.2);
}

/* Slide Navigation Dots */
.hero-dots {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--space-sm);
  z-index: 10;
}

.hero-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.4);
  border: 2px solid rgba(255, 255, 255, 0.6);
  cursor: pointer;
  transition: all var(--transition-normal);
}

.hero-dot.active,
.hero-dot:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  transform: scale(1.2);
}

/* ----------------------------------------------------------
   6. Page Header (Inner Pages Banner)
   ---------------------------------------------------------- */
.page-header {
  position: relative;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  background-size: cover;
  background-position: center;
  padding: var(--space-4xl) 0 var(--space-3xl);
  margin-top: var(--header-height);
  text-align: center;
  overflow: hidden;
}

.page-header::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(26, 54, 93, 0.9) 0%,
    rgba(15, 35, 64, 0.85) 100%
  );
}

.page-header .container {
  position: relative;
  z-index: 1;
}

.page-header h1 {
  color: #fff;
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-sm);
}

.page-header .subtitle {
  color: rgba(255, 255, 255, 0.7);
  font-size: var(--font-size-lg);
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: var(--space-lg);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  font-size: var(--font-size-sm);
  color: rgba(255, 255, 255, 0.6);
  flex-wrap: wrap;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
  transition: color var(--transition-fast);
}

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

.breadcrumb .separator {
  opacity: 0.5;
}

.breadcrumb .current {
  color: var(--color-accent-light);
}

/* ----------------------------------------------------------
   6b. Page Banner (Inner Pages)
   ---------------------------------------------------------- */
.page-banner {
  position: relative;
  background-size: cover;
  background-position: center;
  padding: var(--space-4xl) 0 var(--space-3xl);
  margin-top: var(--header-height);
  text-align: center;
  overflow: hidden;
  color: #fff;
}

.page-banner::before,
.page-banner-overlay {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26, 54, 93, 0.85) 0%, rgba(15, 35, 64, 0.8) 100%);
}

.page-banner .container {
  position: relative;
  z-index: 1;
}

.page-banner h1 {
  color: #fff;
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-sm);
}

.bg-light {
  background-color: var(--color-bg-light);
}

.section-more {
  text-align: center;
  margin-top: var(--space-2xl);
}

.product-detail-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border-light);
}

.product-content.rich-content {
  font-size: var(--font-size-base);
  line-height: 1.8;
}

.product-content.rich-content p {
  margin-bottom: var(--space-lg);
}

.product-content.rich-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  margin: var(--space-lg) 0;
}

/* ----------------------------------------------------------
   7. Section Titles & Utilities
   ---------------------------------------------------------- */
.section {
  padding: var(--space-4xl) 0;
}

.section-alt {
  background-color: var(--color-bg-light);
}

.section-title {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-title h2 {
  font-size: var(--font-size-3xl);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--color-accent);
  margin: var(--space-md) auto 0;
  border-radius: 3px;
}

.section-title p {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin: var(--space-md) auto 0;
}

/* Section header (centered title used across most pages) */
.section-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.section-header h2 {
  font-size: var(--font-size-3xl);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  position: relative;
  display: inline-block;
}

.section-header h2::after {
  content: "";
  display: block;
  width: 60px;
  height: 3px;
  background-color: var(--color-accent);
  margin: var(--space-md) auto 0;
  border-radius: 3px;
}

.section-header p {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
  max-width: 600px;
  margin: var(--space-md) auto 0;
}

.section-header-left {
  text-align: left;
}

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

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--space-sm) var(--space-xl);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  text-align: center;
  cursor: pointer;
  border: 2px solid transparent;
  line-height: 1.5;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #fff;
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-lg {
  padding: var(--space-md) var(--space-2xl);
  font-size: var(--font-size-lg);
}

/* ----------------------------------------------------------
   8. Category Grid (Homepage)
   ---------------------------------------------------------- */
.category-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.category-card {
  position: relative;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  min-height: 220px;
  display: block;
  transition: all var(--transition-normal);
  text-decoration: none;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.category-card-img {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.category-card-img-empty {
  background: linear-gradient(135deg, #1a365d 0%, #2a4a7f 100%);
}

.category-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(26,54,93,0.85) 0%, rgba(26,54,93,0.2) 100%);
  transition: background var(--transition-normal);
}

.category-card:hover .category-card-overlay {
  background: linear-gradient(to top, rgba(232,89,12,0.85) 0%, rgba(232,89,12,0.2) 100%);
}

.category-card-body {
  position: relative;
  z-index: 2;
  padding: var(--space-xl);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
  min-height: 220px;
}

.category-card-body h3 {
  color: #fff;
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-xs);
}

.category-card-more {
  color: rgba(255,255,255,0.8);
  font-size: var(--font-size-sm);
  transition: color var(--transition-fast);
}

.category-card:hover .category-card-more {
  color: #fff;
}

/* ----------------------------------------------------------
   9. Product Grid
   ---------------------------------------------------------- */
.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.product-card {
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}

.product-card-image {
  position: relative;
  width: 100%;
  padding-top: 75%; /* 4:3 aspect ratio */
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.product-card-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card-image img {
  transform: scale(1.05);
}

.product-card-tag {
  position: absolute;
  top: var(--space-md);
  left: var(--space-md);
  background-color: var(--color-accent);
  color: #fff;
  font-size: var(--font-size-xs);
  font-weight: 600;
  padding: var(--space-xs) var(--space-sm);
  border-radius: var(--border-radius);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  z-index: 2;
}

.product-card-body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.product-card-body h3 {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

.product-card-body h3 a {
  color: inherit;
}

.product-card-body h3 a:hover {
  color: var(--color-accent);
}

.product-card-body p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.product-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-md);
  border-top: 1px solid var(--color-border-light);
}

.product-card-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: gap var(--transition-fast);
}

.product-card-link:hover {
  gap: var(--space-sm);
}

.product-card-link::after {
  content: "\2192"; /* right arrow */
}

/* ----------------------------------------------------------
   10. Product Detail Layout
   ---------------------------------------------------------- */

/* Sidebar + main content layout (used by products list, product detail) */
.layout-with-sidebar {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: var(--space-2xl);
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-3xl);
}

.layout-with-sidebar .sidebar {
  position: sticky;
  top: calc(var(--header-height) + var(--space-xl));
  align-self: flex-start;
}

.layout-with-sidebar .main-content {
  min-width: 0;
}

.product-layout {
  display: flex;
  gap: var(--space-2xl);
  padding-top: var(--space-2xl);
  padding-bottom: var(--space-3xl);
}

.sidebar-title {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  padding-bottom: var(--space-sm);
  margin-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-accent);
}

.sidebar-nav {
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.sidebar-nav li {
  border-bottom: 1px solid var(--color-border-light);
}

.sidebar-nav li:last-child {
  border-bottom: none;
}

.sidebar-nav li a {
  display: block;
  padding: var(--space-md) var(--space-lg);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.sidebar-nav li a:hover,
.sidebar-nav li.active a {
  background-color: var(--color-bg-light);
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

.sidebar-product-list li.active a {
  font-weight: 600;
}

.sidebar-nav {
  width: 260px;
  flex-shrink: 0;
  position: sticky;
  top: calc(var(--header-height) + var(--space-xl));
  align-self: flex-start;
}

.sidebar-nav-title {
  background-color: var(--color-primary);
  color: #fff;
  font-size: var(--font-size-lg);
  font-weight: 700;
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.sidebar-nav-list {
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--border-radius) var(--border-radius);
  background-color: var(--color-bg-white);
}

.sidebar-nav-list li {
  border-bottom: 1px solid var(--color-border-light);
}

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

.sidebar-nav-list li a {
  display: block;
  padding: var(--space-md) var(--space-lg);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.sidebar-nav-list li a:hover,
.sidebar-nav-list li.active a {
  background-color: var(--color-bg-light);
  color: var(--color-accent);
  border-left-color: var(--color-accent);
}

.product-content {
  flex: 1;
  min-width: 0;
}

.product-content h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border-light);
}

.product-content h2 {
  font-size: var(--font-size-2xl);
  margin-top: var(--space-2xl);
  margin-bottom: var(--space-md);
  color: var(--color-primary);
}

.product-content h3 {
  font-size: var(--font-size-xl);
  margin-top: var(--space-xl);
  margin-bottom: var(--space-md);
}

.product-content p {
  font-size: var(--font-size-base);
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.product-content img {
  border-radius: var(--border-radius);
  margin: var(--space-lg) 0;
  box-shadow: var(--shadow-sm);
}

/* Product Content Tables */
.product-content table {
  width: 100%;
  border-collapse: collapse;
  margin: var(--space-xl) 0;
  font-size: var(--font-size-sm);
}

.product-content table th,
.product-content table td {
  padding: var(--space-md);
  text-align: left;
  border: 1px solid var(--color-border);
}

.product-content table th {
  background-color: var(--color-primary);
  color: #fff;
  font-weight: 600;
  white-space: nowrap;
}

.product-content table tr:nth-child(even) {
  background-color: var(--color-bg-light);
}

.product-content table tr:hover {
  background-color: #edf2f7;
}

/* Product Gallery */
.product-gallery {
  margin-bottom: var(--space-xl);
}

.product-gallery-main {
  width: 100%;
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  margin-bottom: var(--space-md);
  background-color: var(--color-bg-light);
}

.product-gallery-main img {
  width: 100%;
  height: auto;
  border-radius: 0;
  margin: 0;
  box-shadow: none;
}

.product-gallery-thumbs {
  display: flex;
  gap: var(--space-sm);
}

.product-gallery-thumbs img {
  width: 80px;
  height: 60px;
  object-fit: cover;
  border-radius: var(--border-radius);
  cursor: pointer;
  opacity: 0.6;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  margin: 0;
  box-shadow: none;
}

.product-gallery-thumbs img:hover,
.product-gallery-thumbs img.active {
  opacity: 1;
  border-color: var(--color-accent);
}

/* ----------------------------------------------------------
   11. News Grid & Detail
   ---------------------------------------------------------- */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.news-card {
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.news-card-image {
  position: relative;
  width: 100%;
  padding-top: 60%;
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.news-card-image img {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.news-card:hover .news-card-image img {
  transform: scale(1.05);
}

.news-card-body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card-date {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.news-card-body h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-sm);
  line-height: 1.4;
}

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

.news-card-body h3 a:hover {
  color: var(--color-accent);
}

.news-card-excerpt {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: var(--space-md);
}

.news-card-link {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: gap var(--transition-fast);
}

.news-card-link:hover {
  gap: var(--space-sm);
}

/* News Detail */
.news-detail {
  max-width: 800px;
  margin: 0 auto;
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.news-detail-header {
  text-align: center;
  margin-bottom: var(--space-2xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border);
}

.news-detail-header h1 {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.news-detail-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
}

.news-detail-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.news-detail-body {
  font-size: var(--font-size-base);
  line-height: 1.9;
}

.news-detail-body p {
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.news-detail-body img {
  border-radius: var(--border-radius);
  margin: var(--space-xl) 0;
}

/* ----------------------------------------------------------
   12. About Section
   ---------------------------------------------------------- */
.about-banner {
  position: relative;
  height: 400px;
  background-attachment: fixed;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.about-banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-overlay);
}

.about-banner-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 700px;
  padding: var(--space-xl);
}

.about-banner-content h1 {
  color: #fff;
  font-size: var(--font-size-4xl);
  margin-bottom: var(--space-md);
}

.about-banner-content p {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-lg);
}

/* Advantage / Feature Grid */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

.advantage-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

.advantage-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-accent);
}

.advantage-card-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(232, 89, 12, 0.1);
  border-radius: 50%;
  color: var(--color-accent);
  font-size: var(--font-size-2xl);
}

.advantage-card h3 {
  font-size: var(--font-size-lg);
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.advantage-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* About Content Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about-content-text h2 {
  margin-bottom: var(--space-lg);
}

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

.about-content-image img {
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ----------------------------------------------------------
   13. Contact Section
   ---------------------------------------------------------- */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact-info {
  padding: var(--space-xl) 0;
}

.contact-info h2 {
  margin-bottom: var(--space-lg);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-xl);
  border-bottom: 1px solid var(--color-border-light);
}

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

.contact-info-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(232, 89, 12, 0.1);
  border-radius: 50%;
  color: var(--color-accent);
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.contact-info-text h4 {
  font-size: var(--font-size-base);
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.contact-info-text p {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: 0;
}

/* Contact Cards */
.contact-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.contact-card {
  text-align: center;
  padding: var(--space-2xl) var(--space-lg);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  border: 1px solid var(--color-border-light);
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.contact-card-avatar {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--space-lg);
  border-radius: 50%;
  overflow: hidden;
  background-color: var(--color-bg-light);
}

.contact-card-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.contact-card h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xs);
}

.contact-card .role {
  font-size: var(--font-size-sm);
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.contact-card .phone,
.contact-card .email {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xs);
}

/* Contact Form */
.contact-form {
  background-color: var(--color-bg-white);
  padding: var(--space-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-md);
}

.contact-form h2 {
  margin-bottom: var(--space-xl);
}

.form-group {
  margin-bottom: var(--space-lg);
}

.form-group label {
  display: block;
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: var(--space-md);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-base);
  color: var(--color-text);
  background-color: var(--color-bg-white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(232, 89, 12, 0.15);
}

.form-group textarea {
  min-height: 140px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

/* ----------------------------------------------------------
   14. Footer
   ---------------------------------------------------------- */
.footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  padding: var(--space-3xl) 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-2xl);
  padding-bottom: var(--space-3xl);
}

.footer-col h3 {
  color: #fff;
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-lg);
  position: relative;
  padding-bottom: var(--space-sm);
}

.footer-col h3::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 2px;
  background-color: var(--color-accent);
}

.footer-col p {
  color: var(--color-footer-text);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.footer-col ul li {
  margin-bottom: var(--space-sm);
}

.footer-col ul li a {
  color: var(--color-footer-text);
  font-size: var(--font-size-sm);
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.footer-col ul li a:hover {
  color: var(--color-accent-light);
  padding-left: 4px;
}

.footer-col ul li a::before {
  content: "\203A"; /* single right angle quote */
  opacity: 0.5;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  margin-bottom: var(--space-md);
  font-size: var(--font-size-sm);
}

.footer-contact-item span:first-child {
  opacity: 0.6;
  flex-shrink: 0;
}

.footer-social {
  display: flex;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: var(--color-footer-text);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--color-accent);
  color: #fff;
  transform: translateY(-2px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: var(--space-lg) 0;
  text-align: center;
  font-size: var(--font-size-sm);
}

.footer-bottom p {
  color: var(--color-footer-text);
  margin-bottom: 0;
}

.footer-bottom a {
  color: var(--color-footer-text);
}

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

/* ----------------------------------------------------------
   15. Float Bar (Fixed Right Sidebar)
   ---------------------------------------------------------- */
.float-bar {
  position: fixed;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.float-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--border-radius);
  transition: all var(--transition-normal);
  position: relative;
  text-decoration: none;
}

.float-item:hover {
  background: var(--color-accent);
  color: #fff;
  transform: scale(1.1);
}

.float-item span {
  font-size: 11px;
  margin-top: 2px;
}

.float-item svg {
  width: 22px;
  height: 22px;
}

.wechat-popup {
  display: none;
  width: 160px;
  height: 160px;
  position: absolute;
  right: 68px;
  top: 50%;
  transform: translateY(-50%);
  background: #fff;
  padding: 12px;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-lg);
  white-space: nowrap;
}

.wechat-popup img {
  width: 138px;
  height: 138px;
  display: block;
}

.float-wechat:hover .wechat-popup {
  display: block;
}

/* ----------------------------------------------------------
   16. Scroll-to-Top Button
   ---------------------------------------------------------- */
.scroll-top {
  position: fixed;
  bottom: var(--space-2xl);
  right: var(--space-2xl);
  width: 46px;
  height: 46px;
  background-color: var(--color-accent);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: var(--font-size-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 998;
  box-shadow: var(--shadow-md);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.scroll-top:hover {
  background-color: var(--color-accent-dark);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* ----------------------------------------------------------
   17. Pagination
   ---------------------------------------------------------- */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-2xl) 0;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
  height: 40px;
  padding: 0 var(--space-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: all var(--transition-fast);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  background-color: var(--color-bg-white);
}

.pagination a:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
}

.pagination .active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #fff;
  cursor: default;
}

.pagination .disabled {
  opacity: 0.4;
  cursor: not-allowed;
  pointer-events: none;
}

.pagination .ellipsis {
  border: none;
  min-width: auto;
  padding: 0 var(--space-xs);
  color: var(--color-text-muted);
}

/* ----------------------------------------------------------
   18. Loading & Animation Utilities
   ---------------------------------------------------------- */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Skeleton loading placeholder */
.skeleton {
  background: linear-gradient(90deg, #edf2f7 25%, #e2e8f0 50%, #edf2f7 75%);
  background-size: 200% 100%;
  animation: skeleton-loading 1.5s infinite;
}

@keyframes skeleton-loading {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ----------------------------------------------------------
   18b. Sidebar Widgets (Products Page)
   ---------------------------------------------------------- */
.sidebar-widget {
  margin-bottom: var(--space-xl);
}

.sidebar-contact {
  padding: var(--space-lg);
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius);
  text-align: center;
}

.sidebar-contact p {
  font-size: var(--space-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.btn-block {
  display: block;
  width: 100%;
  text-align: center;
}

/* ----------------------------------------------------------
   18c. Product Card Category Label
   ---------------------------------------------------------- */
.product-card-cate {
  display: inline-block;
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

.cate-intro {
  margin-bottom: var(--space-xl);
  color: var(--color-text-light);
}

/* ----------------------------------------------------------
   18d. Homepage About Brief Section
   ---------------------------------------------------------- */
.section-about-brief {
  background-color: var(--color-bg-white);
}

.about-brief-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

/* Tablet: keep two columns but reduce gap */
@media (max-width: 1024px) {
  .about-brief-grid {
    gap: var(--space-2xl);
  }
}

/* Mobile: stack vertically for proper readability */
@media (max-width: 768px) {
  .about-brief-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    text-align: center;
  }

  .about-brief-text {
    order: 1;
  }

  .about-brief-stats {
    order: 2;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--space-xl);
  }

  .stat-item {
    flex: 1 1 30%;
    min-width: 80px;
  }
}

/* Small mobile: keep stats in a row but more compact */
@media (max-width: 480px) {
  .about-brief-stats {
    gap: var(--space-md);
  }

  .stat-item {
    flex: 1 1 28%;
  }
}

.about-brief-text h2 {
  margin-bottom: var(--space-lg);
}

.about-brief-text p {
  line-height: 1.8;
  margin-bottom: var(--space-lg);
}

.about-brief-stats {
  display: flex;
  gap: var(--space-2xl);
}

.stat-item {
  text-align: center;
}

.stat-number {
  display: block;
  font-size: var(--font-size-4xl);
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1.2;
}

.stat-label {
  display: block;
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-xs);
}

/* ----------------------------------------------------------
   18e. Homepage CTA Section
   ---------------------------------------------------------- */
.section-cta {
  position: relative;
  background-size: cover;
  background-position: center;
  background-attachment: fixed;
  padding: var(--space-4xl) 0;
  text-align: center;
}

.cta-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(26, 54, 93, 0.85);
}

.cta-content {
  position: relative;
  z-index: 1;
  color: #fff;
  max-width: 700px;
  margin: 0 auto;
}

.cta-content h2 {
  color: #fff;
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
}

.cta-content p {
  color: rgba(255, 255, 255, 0.85);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-2xl);
}

.cta-actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
}

.btn-outline-light {
  background-color: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
}

.btn-outline-light:hover {
  background-color: #fff;
  color: var(--color-primary);
  border-color: #fff;
}

/* ----------------------------------------------------------
   18f. Section More Link
   ---------------------------------------------------------- */
.section-more {
  text-align: center;
  margin-top: var(--space-2xl);
}

/* ----------------------------------------------------------
   18g. News Detail Page
   ---------------------------------------------------------- */
.section-news-detail {
  padding: var(--space-3xl) 0;
}

.content-narrow {
  max-width: 800px;
  margin: 0 auto;
}

.news-article-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-md);
  line-height: 1.4;
}

.news-article-meta {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.news-article-meta span {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.news-article-cover {
  margin-bottom: var(--space-xl);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.news-article-cover img {
  width: 100%;
  height: auto;
  display: block;
}

.news-article-content {
  font-size: var(--font-size-base);
  line-height: 1.9;
}

.news-article-content p {
  margin-bottom: var(--space-lg);
  color: var(--color-text);
}

.news-article-content img {
  border-radius: var(--border-radius);
  margin: var(--space-lg) 0;
  max-width: 100%;
}

.news-article-footer {
  margin-top: var(--space-2xl);
  padding-top: var(--space-lg);
  border-top: 1px solid var(--color-border);
}

/* ----------------------------------------------------------
   18h. News Gallery
   ---------------------------------------------------------- */
.news-gallery {
  margin-top: var(--space-2xl);
}

.news-gallery h3 {
  margin-bottom: var(--space-lg);
}

.news-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-md);
}

.news-gallery-item {
  border-radius: var(--border-radius);
  overflow: hidden;
}

.news-gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-normal);
}

.news-gallery-item img:hover {
  transform: scale(1.05);
}

/* ----------------------------------------------------------
   18i. News List Page
   ---------------------------------------------------------- */
.section-news-list {
  padding: var(--space-3xl) 0;
}

.news-list-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.news-card-horizontal {
  display: flex;
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.news-card-horizontal:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.news-card-horizontal .news-card-image {
  /* width: 280px; */
  flex-shrink: 0;
  padding-top: 0;
}

.news-card-horizontal .news-card-image img {
  position: static;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-card-horizontal .news-card-body {
  padding: var(--space-lg);
  flex: 1;
  display: flex;
  flex-direction: column;
}

.read-more {
  font-size: var(--font-size-sm);
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  transition: gap var(--transition-fast);
}

.read-more:hover {
  gap: var(--space-sm);
}

/* ----------------------------------------------------------
   18j. About Page Sections
   ---------------------------------------------------------- */
.section-about-intro {
  padding: var(--space-4xl) 0;
}

.section-header-left {
  margin-bottom: var(--space-2xl);
}

.section-header-left h2 {
  margin-bottom: var(--space-sm);
}

.section-header-left p {
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
}

.about-text {
  line-height: 1.9;
  font-size: var(--font-size-base);
}

.about-text p {
  margin-bottom: var(--space-lg);
}

.rich-content img {
  max-width: 100%;
  height: auto;
  border-radius: var(--border-radius);
  margin: var(--space-md) 0;
}

.section-advantages {
  background-color: var(--color-bg-light);
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--space-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(232, 89, 12, 0.1);
  border-radius: 50%;
  color: var(--color-accent);
  font-size: var(--font-size-2xl);
}

/* ----------------------------------------------------------
   18k. About Gallery
   ---------------------------------------------------------- */
.section-about-gallery {
  padding: var(--space-4xl) 0;
}

.about-gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.about-gallery-item {
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.about-gallery-item img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  display: block;
  transition: transform var(--transition-normal);
}

.about-gallery-item img:hover {
  transform: scale(1.05);
}

/* ----------------------------------------------------------
   18l. Contact Page Sections
   ---------------------------------------------------------- */
.section-contact-info {
  padding: var(--space-4xl) 0;
}

.contact-card-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-lg);
}

.contact-card-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

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

.contact-label {
  font-weight: 600;
  color: var(--color-text);
  font-size: var(--font-size-sm);
  min-width: 60px;
}

.contact-value {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

.address-section {
  padding: var(--space-3xl) 0;
  background-color: var(--color-bg-light);
}

.address-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-xl);
}

.address-card {
  background-color: var(--color-bg-white);
  padding: var(--space-2xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-sm);
}

.address-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(232, 89, 12, 0.1);
  border-radius: 50%;
  color: var(--color-accent);
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-lg);
}

.contact-detail {
  padding: var(--space-3xl) 0;
}

.contact-quick-bar {
  display: flex;
  gap: var(--space-lg);
  padding: var(--space-xl);
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius-lg);
  margin-bottom: var(--space-2xl);
  flex-wrap: wrap;
}

.quick-bar-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  min-width: 200px;
}

.quick-bar-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(232, 89, 12, 0.1);
  border-radius: 50%;
  color: var(--color-accent);
  flex-shrink: 0;
}

.quick-bar-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-muted);
}

.quick-bar-value {
  font-size: var(--font-size-base);
  font-weight: 600;
  color: var(--color-primary);
}

/* ----------------------------------------------------------
   18m. Product Detail Page
   ---------------------------------------------------------- */
.section-product-detail {
  padding: var(--space-2xl) 0 var(--space-3xl);
}

.product-detail-title {
  font-size: var(--font-size-3xl);
  margin-bottom: var(--space-lg);
  padding-bottom: var(--space-md);
  border-bottom: 2px solid var(--color-border-light);
}

.thumb-item {
  width: 80px;
  height: 60px;
  border-radius: var(--border-radius);
  overflow: hidden;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
}

.thumb-item:hover,
.thumb-item.active {
  border-color: var(--color-accent);
}

.thumb-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-meta {
  display: flex;
  gap: var(--space-xl);
  padding: var(--space-lg);
  background-color: var(--color-bg-light);
  border-radius: var(--border-radius);
  margin-bottom: var(--space-xl);
  font-size: var(--font-size-sm);
}

.section-related {
  padding: var(--space-3xl) 0;
  background-color: var(--color-bg-light);
}

.product-grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-xl);
}

/* ----------------------------------------------------------
   18n. Utility Classes
   ---------------------------------------------------------- */
.empty-state {
  text-align: center;
  padding: var(--space-4xl) var(--space-xl);
  color: var(--color-text-muted);
  font-size: var(--font-size-lg);
}

/* ----------------------------------------------------------
   18o. Icon Classes (Unicode replacements)
   ---------------------------------------------------------- */
.icon-phone::before {
  content: "\260E";
  margin-right: 4px;
}

.icon-mail::before {
  content: "\2709";
  margin-right: 4px;
}

.icon-addr::before {
  content: "\2691";
  margin-right: 4px;
}

.icon-calendar::before {
  content: "\1F4C5";
  margin-right: 4px;
}

/* ----------------------------------------------------------
   19. Responsive: Tablet (max-width: 1024px)
   ---------------------------------------------------------- */
@media (max-width: 1024px) {
  :root {
    --font-size-5xl: 2.5rem;
    --font-size-4xl: 2rem;
    --font-size-3xl: 1.5rem;
  }

  .container {
    padding-left: var(--space-md);
    padding-right: var(--space-md);
  }

  /* Header */
  .header-top-right {
    display: none;
  }

  /* Hero */
  .hero-slider {
    height: 60vh;
    min-height: 400px;
  }

  /* Grids */
  .product-grid,
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .category-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .advantage-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* About */
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  /* Contact */
  .contact-section {
    grid-template-columns: 1fr;
  }

  .contact-cards {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Product Detail */
  .product-layout {
    flex-direction: column;
  }

  .sidebar-nav {
    width: 100%;
    position: static;
  }

  /* Sidebar + main content stacks on tablet */
  .layout-with-sidebar {
    grid-template-columns: 1fr;
  }

  .layout-with-sidebar .sidebar {
    position: static;
  }

  /* Float bar */
  .float-bar {
    display: none;
  }
}

/* ----------------------------------------------------------
   20. Responsive: Mobile (max-width: 768px)
   ---------------------------------------------------------- */
@media (max-width: 768px) {
  :root {
    --font-size-5xl: 2rem;
    --font-size-4xl: 1.75rem;
    --font-size-3xl: 1.375rem;
    --font-size-2xl: 1.25rem;
    --space-4xl: 3.5rem;
    --space-3xl: 2.5rem;
  }

  /* Header top */
  .header-top {
    display: none;
  }

  .hero-slider {
    margin-top: 60px;
  }

  .page-header {
    margin-top: 60px;
    padding: var(--space-3xl) 0 var(--space-2xl);
  }

  /* Mobile menu toggle */
  .menu-toggle {
    display: flex;
  }

  /* Mobile nav menu */
  .nav-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background-color: var(--color-bg-white);
    flex-direction: column;
    align-items: stretch;
    padding: calc(var(--header-height) + var(--space-md)) 0 var(--space-xl);
    box-shadow: -5px 0 30px rgba(0, 0, 0, 0.15);
    transition: right var(--transition-normal);
    overflow-y: auto;
    z-index: 1000;
  }

  .nav-menu.open {
    right: 0;
  }

  .nav-menu > li > a {
    padding: var(--space-md) var(--space-xl);
    border-bottom: 1px solid var(--color-border-light);
  }

  .nav-menu > li > a::after {
    display: none;
  }

  .nav-menu > li.active > a {
    border-left: 3px solid var(--color-accent);
  }

  /* Mobile dropdown */
  .has-dropdown > a::before {
    float: right;
    margin-top: 6px;
  }

  .dropdown-menu {
    position: static;
    opacity: 1;
    visibility: visible;
    transform: none;
    box-shadow: none;
    border: none;
    display: none;
    background-color: var(--color-bg-light);
    padding: 0;
  }

  .has-dropdown.open .dropdown-menu {
    display: block;
  }

  .dropdown-menu li a {
    padding-left: var(--space-2xl);
  }

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

  .nav-overlay.active {
    display: block;
  }

  /* Hero */
  .hero-slider {
    height: 50vh;
    min-height: 350px;
  }

  .hero-slide-content h1 {
    font-size: var(--font-size-3xl);
  }

  .hero-slide-content p {
    font-size: var(--font-size-base);
  }

  .hero-cta {
    padding: var(--space-sm) var(--space-xl);
    font-size: var(--font-size-base);
  }

  /* Grids -> single column */
  .product-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .advantage-grid {
    grid-template-columns: 1fr 1fr;
  }

  .contact-cards {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  /* About parallax disabled on mobile */
  .about-banner {
    background-attachment: scroll;
    height: 300px;
  }

  /* Form row stack */
  .form-row {
    grid-template-columns: 1fr;
  }

  /* Pagination */
  .pagination {
    flex-wrap: wrap;
  }

  /* Scroll top */
  .scroll-top {
    bottom: var(--space-md);
    right: var(--space-md);
    width: 40px;
    height: 40px;
    font-size: var(--font-size-base);
  }
}

/* ----------------------------------------------------------
   21. Responsive: Small Mobile (max-width: 480px)
   ---------------------------------------------------------- */
@media (max-width: 480px) {
  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .hero-dots {
    bottom: var(--space-md);
  }

  .hero-dot {
    width: 10px;
    height: 10px;
  }
}

/* ----------------------------------------------------------
   22. Print Styles
   ---------------------------------------------------------- */
@media print {
  .header,
  .float-bar,
  .scroll-top,
  .hero-dots,
  .footer,
  .menu-toggle {
    display: none !important;
  }

  body {
    color: #000;
    background: #fff;
  }

  .hero-slider,
  .page-header {
    margin-top: 0;
  }

  a {
    color: #000;
    text-decoration: underline;
  }

  .container {
    max-width: 100%;
  }
}