/* ============================================
   德彦众合企业官网 V3 - 主样式文件
   设计风格：简洁科技风，蓝色主调
   ============================================ */

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

:root {
  /* 主色调 */
  --color-primary: #0a2540;
  --color-secondary: #1a73e8;
  --color-accent: #4dabf7;
  --color-primary-light: #0d3158;
  --color-secondary-light: #4a9af5;

  /* 中性色 */
  --color-dark: #1a1a2e;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-lighter: #999999;
  --color-border: #e0e6ed;
  --color-bg: #f8f9fb;
  --color-bg-alt: #f0f4f8;
  --color-white: #ffffff;

  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #0a2540 0%, #1a73e8 100%);
  --gradient-hero: linear-gradient(135deg, #0a2540 0%, #0d3b6e 40%, #1a73e8 100%);
  --gradient-accent: linear-gradient(135deg, #1a73e8 0%, #4dabf7 100%);
  --gradient-dark: linear-gradient(135deg, #0a2540 0%, #162d50 100%);

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.06);
  --shadow-md: 0 4px 16px rgba(10, 37, 64, 0.1);
  --shadow-lg: 0 8px 30px rgba(10, 37, 64, 0.15);
  --shadow-xl: 0 12px 40px rgba(10, 37, 64, 0.2);
  --shadow-card: 0 4px 20px rgba(10, 37, 64, 0.08);
  --shadow-card-hover: 0 12px 36px rgba(10, 37, 64, 0.16);

  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 50%;

  /* 过渡 */
  --transition-base: all 0.3s ease;
  --transition-slow: all 0.5s ease;

  /* 字体 */
  --font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  /* 导航高度 */
  --nav-height: 75px;

  /* 容器宽度 */
  --container-max: 1200px;
  --container-padding: 20px;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background-color: var(--color-white);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.3;
  color: var(--color-primary);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: 1rem;
  line-height: 1.8;
  color: var(--color-text-light);
}

/* === 1. Container & Layout === */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: 80px 0;
}

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

/* === 2. Typography - Section Headers === */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
  position: relative;
  display: inline-block;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-light);
  margin-top: 8px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-decorator {
  width: 60px;
  height: 3px;
  background: var(--gradient-accent);
  margin: 16px auto 0;
  border-radius: 2px;
}

/* === 3. Button System === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 1rem;
  font-weight: 500;
  font-family: var(--font-family);
  border-radius: var(--radius-sm);
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--transition-base);
  text-align: center;
  line-height: 1.5;
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn-primary:hover {
  background: #1565c0;
  border-color: #1565c0;
  box-shadow: 0 4px 16px rgba(26, 115, 232, 0.4);
}

.btn-outline {
  background: var(--color-white);
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

.btn-outline:hover {
  background: var(--color-secondary);
  color: var(--color-white);
  box-shadow: 0 4px 16px rgba(26, 115, 232, 0.3);
}

.btn-secondary {
  background: transparent;
  color: var(--color-white);
  border-color: var(--color-white);
}

.btn-secondary:hover {
  background: var(--color-white);
  color: var(--color-secondary);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

.btn-lg {
  padding: 16px 36px;
  font-size: 1.1rem;
}

.btn-block {
  display: flex;
  width: 100%;
}

/* === 4. Site Header / Navigation === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background-color: var(--color-white);
  z-index: 1000;
  transition: var(--transition-base);
}

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

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 1px;
}

.logo-text span {
  color: var(--color-secondary);
}

/* Main Navigation */
.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  position: relative;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-secondary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 20px;
  height: 2px;
  background-color: var(--color-secondary);
  border-radius: 1px;
  transition: var(--transition-base);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

/* Dropdown */
.nav-item {
  position: relative;
}

.nav-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 180px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
  padding: 8px 0;
  z-index: 100;
}

.nav-item:hover .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown a {
  display: block;
  padding: 8px 20px;
  font-size: 0.9rem;
  color: var(--color-text);
  white-space: nowrap;
}

.nav-dropdown a:hover {
  background-color: var(--color-bg);
  color: var(--color-secondary);
}

/* Hamburger Menu */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  cursor: pointer;
  background: none;
  border: none;
  gap: 5px;
  padding: 8px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Header CTA */
.header-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}

/* === 5. Hero Banner === */
.hero-banner {
  position: relative;
  height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  overflow: hidden;
  margin-top: var(--nav-height);
}

/* CSS Geometric Pattern Overlay */
.hero-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 20% 50%, rgba(77, 171, 247, 0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(26, 115, 232, 0.1) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(77, 171, 247, 0.08) 0%, transparent 40%);
  z-index: 1;
}

.hero-banner::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    linear-gradient(30deg, rgba(255,255,255,0.03) 12%, transparent 12.5%, transparent 87%, rgba(255,255,255,0.03) 87.5%),
    linear-gradient(150deg, rgba(255,255,255,0.03) 12%, transparent 12.5%, transparent 87%, rgba(255,255,255,0.03) 87.5%),
    linear-gradient(30deg, rgba(255,255,255,0.03) 12%, transparent 12.5%, transparent 87%, rgba(255,255,255,0.03) 87.5%),
    linear-gradient(150deg, rgba(255,255,255,0.03) 12%, transparent 12.5%, transparent 87%, rgba(255,255,255,0.03) 87.5%),
    linear-gradient(60deg, rgba(255,255,255,0.02) 25%, transparent 25.5%, transparent 75%, rgba(255,255,255,0.02) 75%),
    linear-gradient(60deg, rgba(255,255,255,0.02) 25%, transparent 25.5%, transparent 75%, rgba(255,255,255,0.02) 75%);
  background-size: 80px 140px;
  background-position: 0 0, 0 0, 40px 70px, 40px 70px, 0 0, 40px 70px;
  z-index: 1;
}

/* Floating geometric shapes */
.hero-geometric {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 1;
  overflow: hidden;
}

.hero-geometric::before {
  content: '';
  position: absolute;
  top: 15%;
  right: 10%;
  width: 120px;
  height: 120px;
  border: 2px solid rgba(255, 255, 255, 0.08);
  border-radius: 50%;
  animation: float 6s ease-in-out infinite;
}

.hero-geometric::after {
  content: '';
  position: absolute;
  bottom: 20%;
  left: 8%;
  width: 80px;
  height: 80px;
  border: 2px solid rgba(255, 255, 255, 0.06);
  transform: rotate(45deg);
  animation: float 8s ease-in-out infinite reverse;
}

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  padding: 0 20px;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-white);
  margin-bottom: 20px;
  letter-spacing: 2px;
  line-height: 1.2;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 36px;
  line-height: 1.8;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* === 6. Page Banner (Sub Pages) === */
.page-banner {
  position: relative;
  height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-hero);
  overflow: hidden;
  margin-top: var(--nav-height);
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image:
    radial-gradient(circle at 25% 50%, rgba(77, 171, 247, 0.12) 0%, transparent 50%),
    radial-gradient(circle at 75% 30%, rgba(26, 115, 232, 0.08) 0%, transparent 40%);
  z-index: 1;
}

.page-banner .container {
  position: relative;
  z-index: 2;
  text-align: center;
}

.page-banner h1 {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 12px;
}

.page-banner .section-subtitle,
.page-banner p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 1.1rem;
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 16px;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.8);
}

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

.breadcrumb .separator {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.8rem;
}

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

/* === 7. Business Cards === */
.business-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.business-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 40px 30px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
}

.business-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: transparent;
}

.card-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  border-radius: var(--radius-md);
  font-size: 2rem;
  color: var(--color-white);
  transition: var(--transition-base);
}

.business-card:hover .card-icon {
  transform: scale(1.1);
}

.business-card h3 {
  font-size: 1.25rem;
  margin-bottom: 12px;
  color: var(--color-primary);
}

.business-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  color: var(--color-secondary);
  font-weight: 500;
}

.card-link:hover {
  color: var(--color-accent);
  gap: 10px;
}

.card-link::after {
  content: '→';
  transition: var(--transition-base);
}

/* === 8. Products === */
.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.product-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: transparent;
}

/* Product Image Placeholder */
.product-image {
  height: 220px;
  background: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 20px;
  border-bottom: 1px solid #eef2f6;
}

.product-image img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

.product-info {
  padding: 24px;
}

.product-model {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.product-category {
  font-size: 0.85rem;
  color: var(--color-secondary);
  margin-bottom: 10px;
  font-weight: 500;
}

.product-scenes {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.6;
}

.product-custom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.product-custom .btn-sm {
  font-size: 0.85rem;
}

/* Product Tags */
.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.product-tag {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.75rem;
  background: var(--color-bg);
  color: var(--color-text-light);
  border-radius: 20px;
  border: 1px solid var(--color-border);
}

/* === 9. Filter Bar === */
.filter-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 40px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.filter-tab {
  display: inline-flex;
  align-items: center;
  padding: 8px 20px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-light);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition-base);
  font-family: var(--font-family);
}

.filter-tab:hover {
  color: var(--color-secondary);
  border-color: var(--color-secondary);
  background: rgba(26, 115, 232, 0.05);
}

.filter-tab.active {
  background: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

/* === 10. Industries Grid === */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.industry-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 30px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
  cursor: default;
}

.industry-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
}

.industry-item .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
}

.industry-item h4 {
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.industry-item p {
  font-size: 0.85rem;
  color: var(--color-text-lighter);
  margin-bottom: 0;
}

/* === 11. Stats Section === */
.stats-section {
  background: var(--gradient-primary);
  padding: 60px 0;
  position: relative;
  overflow: hidden;
}

.stats-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    radial-gradient(circle at 20% 50%, rgba(77, 171, 247, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(77, 171, 247, 0.08) 0%, transparent 40%);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
  z-index: 1;
}

.stat-item {
  text-align: center;
  padding: 20px;
}

.stat-number {
  font-size: 3.5rem;
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.1;
  margin-bottom: 8px;
  display: block;
}

.stat-number .suffix {
  font-size: 1.5rem;
  font-weight: 600;
  margin-left: 4px;
}

.stat-label {
  font-size: 1rem;
  color: rgba(255, 255, 255, 0.75);
  letter-spacing: 1px;
}

/* Divider between stats */
.stat-item + .stat-item {
  border-left: 1px solid rgba(255, 255, 255, 0.15);
}

/* === 12. Partners === */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.partner-item {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
  min-height: 80px;
}

.partner-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-secondary);
}

.partner-item img {
  max-height: 40px;
  max-width: 120px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: var(--transition-base);
}

.partner-item:hover img {
  filter: grayscale(0);
  opacity: 1;
}

/* === 13. Solutions === */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.solution-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  display: flex;
  border: 1px solid var(--color-border);
}

.solution-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: transparent;
}

.solution-image {
  flex: 0 0 220px;
  min-height: 200px;
  background: linear-gradient(135deg, #e8edf2 0%, #c5d4e3 100%);
  position: relative;
  overflow: hidden;
}

.solution-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(10, 37, 64, 0.3) 0%, rgba(26, 115, 232, 0.2) 100%);
}

.solution-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.solution-content {
  flex: 1;
  padding: 30px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.solution-content h3 {
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.solution-content p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.solution-content .card-link {
  margin-top: auto;
}

/* Full-width solution variant */
.solution-card.full-width {
  grid-column: 1 / -1;
  flex-direction: row;
}

.solution-card.full-width .solution-image {
  flex: 0 0 400px;
  min-height: 250px;
}

/* === 14. News === */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.news-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
}

.news-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
  border-color: transparent;
}

.news-image {
  height: 200px;
  background: linear-gradient(135deg, #e8edf2 0%, #d1dce6 100%);
  position: relative;
  overflow: hidden;
}

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

.news-image::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to bottom, transparent 60%, rgba(10, 37, 64, 0.05) 100%);
  z-index: 1;
}

.news-body {
  padding: 24px;
}

.news-date {
  font-size: 0.8rem;
  color: var(--color-text-lighter);
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-date::before {
  content: '📅';
  font-size: 0.75rem;
}

.news-category {
  display: inline-block;
  padding: 3px 10px;
  font-size: 0.75rem;
  background: rgba(26, 115, 232, 0.08);
  color: var(--color-secondary);
  border-radius: 20px;
  margin-bottom: 10px;
  font-weight: 500;
}

.news-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-title:hover {
  color: var(--color-secondary);
}

.news-summary {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 0;
}

/* === 15. About Page === */
.about-intro {
  padding: 40px 0;
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-content h2 {
  font-size: 2rem;
  margin-bottom: 20px;
  color: var(--color-primary);
}

.about-content p {
  font-size: 1rem;
  line-height: 1.9;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

/* Advantages Grid */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: var(--transition-base);
}

.advantage-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.advantage-card:hover::before {
  transform: scaleX(1);
}

.advantage-card .icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 115, 232, 0.08);
  border-radius: var(--radius-md);
  font-size: 1.8rem;
  transition: var(--transition-base);
}

.advantage-card:hover .icon {
  background: var(--gradient-accent);
  transform: scale(1.1);
}

.advantage-card:hover .icon span {
  filter: brightness(0) invert(1);
}

.advantage-card h4 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.advantage-card p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Timeline */
.timeline {
  position: relative;
  padding: 40px 0;
}

.timeline::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 3px;
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.timeline-item {
  position: relative;
  padding: 20px 0;
  display: flex;
  align-items: flex-start;
}

.timeline-item:nth-child(odd) {
  justify-content: flex-start;
  padding-right: calc(50% + 40px);
  text-align: right;
}

.timeline-item:nth-child(even) {
  justify-content: flex-end;
  padding-left: calc(50% + 40px);
  text-align: left;
}

.timeline-item::before {
  content: '';
  position: absolute;
  top: 28px;
  left: 50%;
  transform: translateX(-50%);
  width: 16px;
  height: 16px;
  background: var(--color-white);
  border: 3px solid var(--color-secondary);
  border-radius: var(--radius-full);
  z-index: 1;
  transition: var(--transition-base);
}

.timeline-item:hover::before {
  background: var(--color-secondary);
  transform: translateX(-50%) scale(1.3);
}

.timeline-content {
  background: var(--color-white);
  padding: 24px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
  max-width: 100%;
}

.timeline-item:hover .timeline-content {
  box-shadow: var(--shadow-md);
  border-color: var(--color-secondary);
}

.timeline-year {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.timeline-title {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.timeline-desc {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

/* Honor Grid */
.honor-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.honor-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.honor-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.honor-item .icon {
  font-size: 2.5rem;
  margin-bottom: 12px;
  display: block;
}

.honor-item h4 {
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.honor-item p {
  font-size: 0.85rem;
  color: var(--color-text-lighter);
  margin-bottom: 0;
}

/* === 16. Contact === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 50px;
}

.contact-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 36px 24px;
  text-align: center;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
}

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

.contact-card .icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 115, 232, 0.08);
  border-radius: var(--radius-full);
  font-size: 1.8rem;
  transition: var(--transition-base);
}

.contact-card:hover .icon {
  background: var(--gradient-accent);
  transform: scale(1.1);
}

.contact-card h4 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.contact-card p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

.contact-card a {
  color: var(--color-secondary);
}

.contact-card a:hover {
  text-decoration: underline;
}

/* Map Placeholder */
.map-placeholder {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, #e8edf2 0%, #d1dce6 50%, #c5d4e3 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.map-placeholder::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background:
    repeating-linear-gradient(0deg, transparent, transparent 40px, rgba(26, 115, 232, 0.03) 40px, rgba(26, 115, 232, 0.03) 41px),
    repeating-linear-gradient(90deg, transparent, transparent 40px, rgba(26, 115, 232, 0.03) 40px, rgba(26, 115, 232, 0.03) 41px);
}

.map-placeholder .map-pin {
  position: relative;
  z-index: 1;
  text-align: center;
}

.map-placeholder .map-pin .icon {
  font-size: 3rem;
  display: block;
  margin-bottom: 8px;
}

.map-placeholder .map-pin p {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 500;
}

/* === 17. Product Detail === */
.detail-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: flex-start;
  padding: 20px 0;
}

.detail-image,
.detail-main-image {
  background: #ffffff;
  border-radius: var(--radius-md);
  height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 30px;
  border: 1px solid #eef2f6;
}

.detail-image img,
.detail-main-image img {
  max-width: 100%;
  max-height: 100%;
  width: auto;
  height: auto;
  object-fit: contain;
  display: block;
}

.detail-info {
  padding: 10px 0;
}

.detail-info h1 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.detail-info .detail-category {
  display: inline-block;
  padding: 4px 14px;
  font-size: 0.85rem;
  background: rgba(26, 115, 232, 0.08);
  color: var(--color-secondary);
  border-radius: 20px;
  margin-bottom: 20px;
  font-weight: 500;
}

.detail-info .detail-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 24px;
}

.detail-specs {
  margin-bottom: 30px;
}

.detail-specs h3 {
  font-size: 1.2rem;
  color: var(--color-primary);
  margin-bottom: 16px;
}

.spec-table {
  width: 100%;
  border-collapse: collapse;
}

.spec-table tr {
  border-bottom: 1px solid var(--color-border);
}

.spec-table td {
  padding: 12px 16px;
  font-size: 0.95rem;
}

.spec-table td:first-child {
  font-weight: 600;
  color: var(--color-primary);
  width: 35%;
  background: var(--color-bg);
}

.spec-table td:last-child {
  color: var(--color-text-light);
}

.detail-actions {
  display: flex;
  gap: 16px;
  margin-top: 30px;
}

/* Related Products */
.related-products {
  margin-top: 60px;
  padding-top: 60px;
  border-top: 1px solid var(--color-border);
}

.related-products h2 {
  font-size: 1.75rem;
  color: var(--color-primary);
  margin-bottom: 30px;
  text-align: center;
}

/* === 18. Footer === */
.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.7);
  padding-top: 60px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.footer-col h4 {
  font-size: 1.1rem;
  color: var(--color-white);
  margin-bottom: 20px;
  font-weight: 600;
}

.footer-col p {
  font-size: 0.9rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.6);
  margin-bottom: 12px;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: rgba(255, 255, 255, 0.6);
  padding: 5px 0;
  transition: var(--transition-base);
}

.footer-col a:hover {
  color: var(--color-accent);
  padding-left: 6px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}

.footer-logo .logo-text {
  font-size: 1.3rem;
  color: var(--color-white);
}

.footer-contact-info p {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.footer-contact-info .icon {
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-social {
  display: flex;
  gap: 12px;
  margin-top: 16px;
}

.footer-social a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  background: rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.7);
  font-size: 1rem;
  padding: 0;
}

.footer-social a:hover {
  background: var(--color-secondary);
  color: var(--color-white);
  padding-left: 0;
}

/* Footer QR */
.footer-qr {
  text-align: center;
}

.footer-qr .qr-image {
  width: 100px;
  height: 100px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  margin: 0 auto 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.footer-qr p {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.5);
}

/* Footer Bottom */
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0;
}

.footer-bottom a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.85rem;
  display: inline;
  padding: 0;
}

.footer-bottom a:hover {
  color: var(--color-accent);
  padding-left: 0;
}

.footer-links {
  display: flex;
  gap: 20px;
}

/* === 19. Back to Top === */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--color-secondary);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: var(--transition-base);
  z-index: 999;
}

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

.back-to-top:hover {
  background: var(--color-primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

/* === 20. Contact Form === */
.contact-form {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}

.contact-form h3 {
  font-size: 1.5rem;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 12px 16px;
  font-size: 0.95rem;
  font-family: var(--font-family);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  transition: var(--transition-base);
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--color-secondary);
  background: var(--color-white);
  box-shadow: 0 0 0 3px rgba(26, 115, 232, 0.1);
}

.form-group textarea {
  height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

/* === 21. Utility Classes === */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-secondary); }
.text-dark { color: var(--color-primary); }
.text-muted { color: var(--color-text-lighter); }

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

.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mt-4 { margin-top: 40px; }
.mt-5 { margin-top: 60px; }

.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.mb-4 { margin-bottom: 40px; }
.mb-5 { margin-bottom: 60px; }

.pt-0 { padding-top: 0; }
.pb-0 { padding-bottom: 0; }

.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.gap-3 { gap: 24px; }

.w-100 { width: 100%; }

/* === 22. Loading / Animation === */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInLeft {
  from { opacity: 0; transform: translateX(-30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeInRight {
  from { opacity: 0; transform: translateX(30px); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
  0%, 100% { transform: scale(1); }
  50% { transform: scale(1.05); }
}

.animate-fadeIn { animation: fadeIn 0.6s ease forwards; }
.animate-fadeInLeft { animation: fadeInLeft 0.6s ease forwards; }
.animate-fadeInRight { animation: fadeInRight 0.6s ease forwards; }
.animate-scaleIn { animation: scaleIn 0.6s ease forwards; }
.animate-slideDown { animation: slideDown 0.4s ease forwards; }

/* Scroll Reveal - default hidden state */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* === 23. Pagination === */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 40px;
}

.pagination a,
.pagination span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  transition: var(--transition-base);
}

.pagination a:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
  background: rgba(26, 115, 232, 0.05);
}

.pagination .active {
  background: var(--color-secondary);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.pagination .disabled {
  opacity: 0.4;
  pointer-events: none;
}

/* === 24. Sidebar / Widgets === */
.sidebar {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
}

.sidebar-title {
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-secondary);
}

.sidebar-nav a {
  display: block;
  padding: 10px 16px;
  font-size: 0.95rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
  background: rgba(26, 115, 232, 0.08);
  color: var(--color-secondary);
}

/* === 25. Tags / Badges === */
.badge {
  display: inline-block;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: 20px;
}

.badge-primary {
  background: rgba(26, 115, 232, 0.1);
  color: var(--color-secondary);
}

.badge-success {
  background: rgba(40, 167, 69, 0.1);
  color: #28a745;
}

.badge-warning {
  background: rgba(255, 193, 7, 0.1);
  color: #e0a800;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-item {
  display: inline-block;
  padding: 5px 14px;
  font-size: 0.85rem;
  background: var(--color-bg);
  color: var(--color-text-light);
  border-radius: 20px;
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.tag-item:hover {
  background: rgba(26, 115, 232, 0.08);
  color: var(--color-secondary);
  border-color: var(--color-secondary);
}

/* === 26. CTA Section === */
.cta-section {
  background: var(--gradient-primary);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -10%;
  width: 400px;
  height: 400px;
  border: 2px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -5%;
  width: 300px;
  height: 300px;
  border: 2px solid rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-full);
}

.cta-section h2 {
  font-size: 2.2rem;
  color: var(--color-white);
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-section p {
  font-size: 1.1rem;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: 32px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
  z-index: 1;
}

.cta-section .btn {
  position: relative;
  z-index: 1;
}

/* === 27. Features List === */
.features-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.feature-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--color-secondary);
}

.feature-item .icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 115, 232, 0.08);
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
}

.feature-item h4 {
  font-size: 1rem;
  color: var(--color-primary);
  margin-bottom: 4px;
}

.feature-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-bottom: 0;
  line-height: 1.5;
}

/* === 28. Process / Steps === */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  position: relative;
}

.process-grid::before {
  content: '';
  position: absolute;
  top: 40px;
  left: 12.5%;
  right: 12.5%;
  height: 2px;
  background: var(--color-border);
  z-index: 0;
}

.process-item {
  text-align: center;
  position: relative;
  z-index: 1;
}

.process-item .step-number {
  width: 80px;
  height: 80px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-accent);
  color: var(--color-white);
  border-radius: var(--radius-full);
  font-size: 1.5rem;
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(26, 115, 232, 0.3);
}

.process-item h4 {
  font-size: 1.1rem;
  color: var(--color-primary);
  margin-bottom: 8px;
}

.process-item p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* === 29. Breadcrumb (Standalone) === */
.breadcrumb-bar {
  background: var(--color-bg);
  padding: 12px 0;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb-bar .breadcrumb {
  justify-content: flex-start;
  color: var(--color-text-light);
  margin: 0;
}

.breadcrumb-bar .breadcrumb a {
  color: var(--color-text-light);
}

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

.breadcrumb-bar .breadcrumb .separator {
  color: var(--color-text-lighter);
}

.breadcrumb-bar .breadcrumb .current {
  color: var(--color-secondary);
}

/* === 30. Mobile Navigation Overlay === */
.mobile-nav-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 37, 64, 0.5);
  z-index: 998;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
}

.mobile-nav-overlay.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav {
  position: fixed;
  top: 0;
  right: -300px;
  width: 300px;
  height: 100%;
  background: var(--color-white);
  z-index: 999;
  padding: 80px 20px 20px;
  overflow-y: auto;
  transition: var(--transition-base);
  box-shadow: var(--shadow-xl);
}

.mobile-nav.active {
  right: 0;
}

.mobile-nav a {
  display: block;
  padding: 14px 16px;
  font-size: 1rem;
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition-base);
}

.mobile-nav a:hover {
  color: var(--color-secondary);
  padding-left: 22px;
}

.mobile-nav .sub-nav {
  padding-left: 20px;
}

.mobile-nav .sub-nav a {
  font-size: 0.9rem;
  color: var(--color-text-light);
  border-bottom: 1px solid var(--color-bg);
}

/* === 31. Testimonials === */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.testimonial-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
  transition: var(--transition-base);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: 16px;
  right: 24px;
  font-size: 4rem;
  color: rgba(26, 115, 232, 0.1);
  font-family: Georgia, serif;
  line-height: 1;
}

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

.testimonial-text {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-author .avatar {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-full);
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 600;
  font-size: 1rem;
}

.testimonial-author .info h5 {
  font-size: 0.95rem;
  color: var(--color-primary);
  margin-bottom: 2px;
}

.testimonial-author .info span {
  font-size: 0.8rem;
  color: var(--color-text-lighter);
}

/* === 32. Service / Advantage Cards Variant === */
.service-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: var(--transition-base);
  border: 1px solid var(--color-border);
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transition: var(--transition-base);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-card-hover);
}

.service-card:hover::after {
  transform: scaleX(1);
}

/* === 33. Two Column Layout === */
.two-col-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  align-items: flex-start;
}

/* === 34. FAQ Accordion === */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: var(--color-white);
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: var(--transition-base);
}

.faq-item:hover {
  border-color: var(--color-secondary);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-primary);
  cursor: pointer;
  transition: var(--transition-base);
}

.faq-question:hover {
  color: var(--color-secondary);
}

.faq-question .toggle-icon {
  font-size: 1.2rem;
  transition: var(--transition-base);
  flex-shrink: 0;
  margin-left: 12px;
}

.faq-item.active .faq-question .toggle-icon {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

.faq-answer p {
  padding: 0 24px 18px;
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* === 35. Responsive - 1200px === */
@media (max-width: 1200px) {
  .container {
    max-width: 960px;
  }

  .footer-grid {
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 30px;
  }

  .business-grid {
    gap: 20px;
  }

  .products-grid {
    gap: 20px;
  }

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

  .partners-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* === 36. Responsive - 992px === */
@media (max-width: 992px) {
  html {
    font-size: 15px;
  }

  .section {
    padding: 60px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .section-title {
    font-size: 1.8rem;
  }

  /* Navigation */
  .main-nav {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  /* Hero */
  .hero-banner {
    height: 400px;
  }

  .hero-title {
    font-size: 2.2rem;
  }

  .hero-subtitle {
    font-size: 1rem;
  }

  /* Page Banner */
  .page-banner {
    height: 220px;
  }

  .page-banner h1 {
    font-size: 2rem;
  }

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

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

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

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }

  .stat-item + .stat-item {
    border-left: none;
  }

  .stat-item:nth-child(odd) {
    border-right: 1px solid rgba(255, 255, 255, 0.15);
  }

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

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

  .solution-card.full-width .solution-image {
    flex: 0 0 280px;
  }

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

  /* About */
  .about-content {
    max-width: 100%;
  }

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

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

  /* Contact */
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Detail */
  .detail-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .detail-image {
    height: 350px;
  }

  /* Timeline */
  .timeline::before {
    left: 30px;
  }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-left: 70px;
    padding-right: 0;
    text-align: left;
  }

  .timeline-item::before {
    left: 30px;
    transform: translateX(-50%);
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 30px;
  }

  /* Two Col Layout */
  .two-col-layout {
    grid-template-columns: 1fr;
  }

  /* Process */
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .process-grid::before {
    display: none;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* Features */
  .features-list {
    grid-template-columns: 1fr;
  }
}

/* === 37. Responsive - 768px === */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }

  .section {
    padding: 50px 0;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .section-subtitle {
    font-size: 0.95rem;
  }

  /* Hero */
  .hero-banner {
    height: 360px;
  }

  .hero-title {
    font-size: 1.8rem;
    letter-spacing: 1px;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
    gap: 12px;
  }

  .hero-buttons .btn {
    width: 200px;
  }

  /* Page Banner */
  .page-banner {
    height: 200px;
  }

  .page-banner h1 {
    font-size: 1.7rem;
  }

  /* Grids */
  .business-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .products-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .industries-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

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

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

  .advantages-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .honor-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  /* Stats */
  .stats-section {
    padding: 40px 0;
  }

  .stat-number {
    font-size: 2.5rem;
  }

  .stat-label {
    font-size: 0.9rem;
  }

  /* Contact */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .map-placeholder {
    height: 280px;
  }

  /* Solution */
  .solution-card {
    flex-direction: column;
  }

  .solution-image {
    flex: none;
    height: 180px;
  }

  .solution-card.full-width .solution-image {
    flex: none;
    height: 200px;
  }

  /* Footer */
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }

  .footer-links {
    justify-content: center;
  }

  /* Filter Bar */
  .filter-bar {
    gap: 8px;
    margin-bottom: 24px;
  }

  .filter-tab {
    padding: 6px 14px;
    font-size: 0.85rem;
  }

  /* Contact Form */
  .contact-form {
    padding: 24px;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  /* CTA */
  .cta-section {
    padding: 50px 0;
  }

  .cta-section h2 {
    font-size: 1.7rem;
  }

  /* Testimonials */
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

  /* Process */
  .process-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }

  /* Back to Top */
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 42px;
    height: 42px;
  }
}

/* === 38. Responsive - 576px === */
@media (max-width: 576px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 40px 0;
  }

  .section-header {
    margin-bottom: 30px;
  }

  .section-title {
    font-size: 1.4rem;
  }

  .section-decorator {
    width: 40px;
  }

  /* Hero */
  .hero-banner {
    height: 320px;
  }

  .hero-title {
    font-size: 1.5rem;
  }

  .hero-subtitle {
    font-size: 0.9rem;
    margin-bottom: 24px;
  }

  /* Page Banner */
  .page-banner {
    height: 180px;
  }

  .page-banner h1 {
    font-size: 1.4rem;
  }

  /* Grids */
  .products-grid {
    grid-template-columns: 1fr;
  }

  .industries-grid {
    grid-template-columns: 1fr 1fr;
    gap: 12px;
  }

  .industry-item {
    padding: 20px 12px;
  }

  .industry-item .icon {
    font-size: 2rem;
  }

  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

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

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

  /* Stats */
  .stats-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .stat-number {
    font-size: 2rem;
  }

  .stat-item {
    padding: 12px;
  }

  .stat-item + .stat-item {
    border-left: none;
  }

  .stat-item:nth-child(odd) {
    border-right: 1px solid rgba(255, 255, 255, 0.15);
  }

  /* Cards */
  .business-card {
    padding: 28px 20px;
  }

  .product-image {
    height: 180px;
    padding: 15px;
  }

  .product-info {
    padding: 16px;
  }

  /* Solution */
  .solution-content {
    padding: 20px;
  }

  /* News */
  .news-image {
    height: 180px;
  }

  /* Detail */
  .detail-image,
  .detail-main-image {
    height: 260px;
  }

  .detail-info h1 {
    font-size: 1.5rem;
  }

  .detail-actions {
    flex-direction: column;
  }

  .detail-actions .btn {
    width: 100%;
  }

  /* Filter Bar */
  .filter-bar {
    overflow-x: auto;
    flex-wrap: nowrap;
    padding-bottom: 12px;
    -webkit-overflow-scrolling: touch;
  }

  .filter-tab {
    flex-shrink: 0;
  }

  /* Process */
  .process-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  /* Footer */
  .site-footer {
    padding-top: 40px;
  }

  .footer-grid {
    gap: 20px;
  }

  /* Timeline */
  .timeline::before {
    left: 20px;
  }

  .timeline-item:nth-child(odd),
  .timeline-item:nth-child(even) {
    padding-left: 50px;
  }

  .timeline-item::before {
    left: 20px;
    width: 12px;
    height: 12px;
  }

  .timeline-content {
    padding: 16px;
  }

  .timeline-year {
    font-size: 1.2rem;
  }

  /* Back to Top */
  .back-to-top {
    bottom: 16px;
    right: 16px;
    width: 40px;
    height: 40px;
    font-size: 1rem;
  }
}

/* === 39. Print Styles === */
@media print {
  .site-header,
  .hamburger,
  .back-to-top,
  .mobile-nav,
  .mobile-nav-overlay,
  .hero-geometric {
    display: none !important;
  }

  .hero-banner,
  .page-banner {
    margin-top: 0;
    height: auto;
    padding: 40px 0;
    background: var(--color-primary) !important;
  }

  body {
    font-size: 12pt;
    color: #000;
  }

  .section {
    padding: 20px 0;
    page-break-inside: avoid;
  }

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

/* === 40. Custom Scrollbar === */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}

::-webkit-scrollbar-track {
  background: var(--color-bg);
}

::-webkit-scrollbar-thumb {
  background: #c1c9d4;
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: #a0aab5;
}

/* === 41. Selection Color === */
::selection {
  background: rgba(26, 115, 232, 0.2);
  color: var(--color-primary);
}

/* === 42. Focus Styles for Accessibility === */
*:focus-visible {
  outline: 2px solid var(--color-secondary);
  outline-offset: 2px;
}

/* === 43. Additional Component Styles === */

/* Video Background Overlay */
.video-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 37, 64, 0.7);
  z-index: 1;
}

/* Gradient Text */
.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Divider */
.divider {
  width: 100%;
  height: 1px;
  background: var(--color-border);
  margin: 40px 0;
}

.divider-thick {
  height: 3px;
  background: var(--gradient-accent);
  width: 60px;
  margin: 20px auto;
}

/* Image Gallery Grid */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery-item {
  border-radius: var(--radius-sm);
  overflow: hidden;
  aspect-ratio: 4/3;
  position: relative;
  cursor: pointer;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-base);
}

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

.gallery-item::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 37, 64, 0);
  transition: var(--transition-base);
}

.gallery-item:hover::after {
  background: rgba(10, 37, 64, 0.3);
}

/* Logo Showcase */
.logo-showcase {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
  padding: 20px 0;
}

.logo-showcase img {
  height: 40px;
  max-width: 140px;
  object-fit: contain;
  filter: grayscale(100%);
  opacity: 0.6;
  transition: var(--transition-base);
}

.logo-showcase img:hover {
  filter: grayscale(0);
  opacity: 1;
}

/* Quick Contact Widget */
.quick-contact {
  background: var(--gradient-primary);
  border-radius: var(--radius-md);
  padding: 30px;
  color: var(--color-white);
  text-align: center;
}

.quick-contact h4 {
  color: var(--color-white);
  margin-bottom: 12px;
}

.quick-contact p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.95rem;
  margin-bottom: 16px;
}

.quick-contact .phone {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-white);
  display: block;
  margin-bottom: 16px;
}

/* Info Block */
.info-block {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.info-block .icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(26, 115, 232, 0.08);
  border-radius: var(--radius-sm);
  font-size: 1.3rem;
}

.info-block h5 {
  font-size: 0.85rem;
  color: var(--color-text-lighter);
  font-weight: 400;
  margin-bottom: 2px;
}

.info-block p {
  font-size: 1rem;
  color: var(--color-primary);
  font-weight: 500;
  margin-bottom: 0;
}

/* Progress Bar */
.progress-bar {
  height: 6px;
  background: var(--color-bg);
  border-radius: 3px;
  overflow: hidden;
}

.progress-bar .fill {
  height: 100%;
  background: var(--gradient-accent);
  border-radius: 3px;
  transition: width 1s ease;
}

/* Number Counter Animation */
.counter {
  display: inline-block;
}

/* Tooltip */
.tooltip {
  position: relative;
}

.tooltip::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  padding: 6px 12px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.8rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition-base);
  z-index: 10;
}

.tooltip:hover::after {
  opacity: 1;
  visibility: visible;
}

/* Alert / Notification */
.alert {
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  margin-bottom: 20px;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  line-height: 1.5;
}

.alert-info {
  background: rgba(26, 115, 232, 0.08);
  border: 1px solid rgba(26, 115, 232, 0.2);
  color: var(--color-secondary);
}

.alert-success {
  background: rgba(40, 167, 69, 0.08);
  border: 1px solid rgba(40, 167, 69, 0.2);
  color: #28a745;
}

.alert-warning {
  background: rgba(255, 193, 7, 0.08);
  border: 1px solid rgba(255, 193, 7, 0.2);
  color: #e0a800;
}

/* === 44. Additional Product Detail Styles === */
.product-gallery {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 16px;
}

.product-thumbnails {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.product-thumbnails .thumb {
  width: 80px;
  height: 60px;
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 2px solid var(--color-border);
  cursor: pointer;
  transition: var(--transition-base);
}

.product-thumbnails .thumb:hover,
.product-thumbnails .thumb.active {
  border-color: var(--color-secondary);
}

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

.product-main-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, #e8edf2, #d1dce6);
  aspect-ratio: 4/3;
}

.product-main-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Tab Navigation for Product Details */
.tab-nav {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 24px;
  gap: 0;
}

.tab-nav .tab-link {
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-text-light);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: var(--transition-base);
  cursor: pointer;
}

.tab-nav .tab-link:hover {
  color: var(--color-secondary);
}

.tab-nav .tab-link.active {
  color: var(--color-secondary);
  border-bottom-color: var(--color-secondary);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.3s ease;
}

/* === 45. Dark / Accent Section Variants === */
.section-dark {
  background: var(--gradient-primary);
  color: var(--color-white);
}

.section-dark .section-title {
  color: var(--color-white);
}

.section-dark .section-subtitle {
  color: rgba(255, 255, 255, 0.7);
}

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

/* === 46. Ribbon / Top Banner === */
.top-banner {
  background: var(--gradient-accent);
  color: var(--color-white);
  padding: 8px 0;
  font-size: 0.85rem;
  text-align: center;
}

.top-banner a {
  color: var(--color-white);
  text-decoration: underline;
}

/* === 47. Additional Responsive Fine-tuning === */
@media (max-width: 768px) {
  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .product-gallery {
    grid-template-columns: 1fr;
  }

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

  .logo-showcase {
    gap: 20px;
  }

  .logo-showcase img {
    height: 30px;
    max-width: 100px;
  }
}

@media (max-width: 576px) {
  .gallery-grid {
    grid-template-columns: 1fr;
  }

  .tab-nav {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }

  .tab-nav .tab-link {
    padding: 10px 16px;
    font-size: 0.9rem;
    white-space: nowrap;
  }

  .stat-item:nth-child(odd) {
    border-right: 1px solid rgba(255, 255, 255, 0.15);
  }
}

/* === 48. Hover Effects & Interactions === */
.hover-lift {
  transition: var(--transition-base);
}

.hover-lift:hover {
  transform: translateY(-6px);
}

.hover-scale {
  transition: var(--transition-base);
}

.hover-scale:hover {
  transform: scale(1.03);
}

.hover-shadow {
  transition: var(--transition-base);
}

.hover-shadow:hover {
  box-shadow: var(--shadow-lg);
}

/* Staggered animation for grid items */
.business-grid .business-card:nth-child(1) { transition-delay: 0.1s; }
.business-grid .business-card:nth-child(2) { transition-delay: 0.2s; }
.business-grid .business-card:nth-child(3) { transition-delay: 0.3s; }

.products-grid .product-card:nth-child(1) { transition-delay: 0.1s; }
.products-grid .product-card:nth-child(2) { transition-delay: 0.15s; }
.products-grid .product-card:nth-child(3) { transition-delay: 0.2s; }
.products-grid .product-card:nth-child(4) { transition-delay: 0.25s; }
.products-grid .product-card:nth-child(5) { transition-delay: 0.3s; }
.products-grid .product-card:nth-child(6) { transition-delay: 0.35s; }

.industries-grid .industry-item:nth-child(1) { transition-delay: 0.05s; }
.industries-grid .industry-item:nth-child(2) { transition-delay: 0.1s; }
.industries-grid .industry-item:nth-child(3) { transition-delay: 0.15s; }
.industries-grid .industry-item:nth-child(4) { transition-delay: 0.2s; }
.industries-grid .industry-item:nth-child(5) { transition-delay: 0.25s; }
.industries-grid .industry-item:nth-child(6) { transition-delay: 0.3s; }
.industries-grid .industry-item:nth-child(7) { transition-delay: 0.35s; }
.industries-grid .industry-item:nth-child(8) { transition-delay: 0.4s; }

/* === 49. Skeleton Loading === */
.skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--radius-sm);
}

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

.skeleton-text {
  height: 16px;
  margin-bottom: 8px;
}

.skeleton-title {
  height: 24px;
  width: 60%;
  margin-bottom: 12px;
}

.skeleton-image {
  height: 200px;
  width: 100%;
}

/* === 50. Additional Layout Helpers === */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 30px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }

@media (max-width: 992px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 576px) {
  .grid-2 { grid-template-columns: 1fr; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr; }
}

/* === 51. Header Phone / Top Info === */
.header-info {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.85rem;
  color: var(--color-text-light);
}

.header-info .phone {
  font-weight: 600;
  color: var(--color-secondary);
  font-size: 1rem;
}

.header-info .divider-v {
  width: 1px;
  height: 16px;
  background: var(--color-border);
}

/* === 52. Extra Spacing for Nav Height === */
.nav-spacer {
  height: var(--nav-height);
}

/* Hero without nav spacer (already has margin-top) */
.hero-banner.no-spacer,
.page-banner.no-spacer {
  margin-top: 0;
}

/* === 53. Company Info Section === */
.company-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.company-text h2 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 20px;
}

.company-text p {
  font-size: 1rem;
  line-height: 1.8;
  color: var(--color-text-light);
  margin-bottom: 16px;
}

.company-text .highlight {
  color: var(--color-secondary);
  font-weight: 600;
}

.company-image {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  height: 400px;
  background: linear-gradient(135deg, #e8edf2, #c5d4e3);
}

.company-image::after {
  content: '';
  position: absolute;
  top: -20px;
  right: -20px;
  width: 100px;
  height: 100px;
  border: 3px solid var(--color-secondary);
  border-radius: var(--radius-md);
  opacity: 0.3;
}

.company-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

@media (max-width: 992px) {
  .company-info {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .company-image {
    height: 280px;
  }
}

/* === 54. Numbers Highlight Style === */
.number-highlight {
  display: flex;
  gap: 40px;
  margin-top: 30px;
}

.number-highlight .item {
  text-align: center;
}

.number-highlight .number {
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--color-secondary);
  line-height: 1.1;
}

.number-highlight .label {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-top: 4px;
}

@media (max-width: 576px) {
  .number-highlight {
    gap: 20px;
  }

  .number-highlight .number {
    font-size: 1.8rem;
  }
}

/* === 55. Inline SVG Icon Support === */
.icon-svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
  vertical-align: middle;
}

.icon-svg-lg {
  width: 48px;
  height: 48px;
}

/* === 56. News Detail Page === */
.news-detail {
  max-width: 800px;
  margin: 0 auto;
}

.news-detail-header {
  margin-bottom: 30px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-border);
}

.news-detail-header h1 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: 16px;
  line-height: 1.4;
}

.news-detail-meta {
  display: flex;
  align-items: center;
  gap: 20px;
  font-size: 0.9rem;
  color: var(--color-text-lighter);
}

.news-detail-meta span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-detail-body {
  font-size: 1rem;
  line-height: 2;
  color: var(--color-text);
}

.news-detail-body p {
  margin-bottom: 20px;
  color: var(--color-text);
}

.news-detail-body img {
  border-radius: var(--radius-sm);
  margin: 20px 0;
}

.news-detail-body h2,
.news-detail-body h3 {
  margin-top: 30px;
  margin-bottom: 16px;
}

.news-detail-body blockquote {
  border-left: 4px solid var(--color-secondary);
  padding: 16px 24px;
  background: var(--color-bg);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 20px 0;
  font-style: italic;
  color: var(--color-text-light);
}

.news-detail-body ul,
.news-detail-body ol {
  padding-left: 24px;
  margin-bottom: 20px;
}

.news-detail-body li {
  margin-bottom: 8px;
  line-height: 1.8;
}

/* News Navigation */
.news-nav {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--color-border);
}

.news-nav a {
  display: block;
  padding: 16px 20px;
  background: var(--color-bg);
  border-radius: var(--radius-sm);
  transition: var(--transition-base);
}

.news-nav a:hover {
  background: rgba(26, 115, 232, 0.08);
}

.news-nav .label {
  font-size: 0.8rem;
  color: var(--color-text-lighter);
  margin-bottom: 4px;
}

.news-nav .title {
  font-size: 0.95rem;
  color: var(--color-primary);
  font-weight: 500;
}

@media (max-width: 768px) {
  .news-detail-header h1 {
    font-size: 1.5rem;
  }

  .news-nav {
    grid-template-columns: 1fr;
  }
}

/* === Logo Image === */
.logo-img {
  height: 36px;
  width: auto;
  vertical-align: middle;
  margin-right: 8px;
}
.logo {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
}

/* === Map Section === */
.map-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
}
.map-card {
  background: var(--color-white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--color-border);
}
.map-card h3 {
  padding: 16px 20px 0;
  font-size: 1.1rem;
  color: var(--color-primary);
}
.map-card .map-address {
  padding: 0 20px 12px;
  font-size: 0.85rem;
  color: var(--color-text-light);
  line-height: 1.5;
}
.map-card iframe {
  width: 100%;
  height: 300px;
  border: none;
}

@media (max-width: 768px) {
  .map-grid {
    grid-template-columns: 1fr;
  }
}

/* ===== 产品参数规格表 ===== */
.product-specs-section {
  margin: 40px 0 30px;
}

.product-specs-section .section-title {
  margin-bottom: 20px;
}

.specs-table-wrapper {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  border-radius: 8px;
  box-shadow: 0 2px 12px rgba(10, 37, 64, 0.08);
}

.specs-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
  line-height: 1.6;
  min-width: 480px;
}

.specs-table thead th {
  background: #0a2540;
  color: #fff;
  padding: 12px 18px;
  text-align: left;
  font-weight: 600;
  font-size: 0.95rem;
  white-space: nowrap;
  letter-spacing: 0.5px;
}

.specs-table thead th:first-child {
  border-radius: 8px 0 0 0;
  width: 30%;
}

.specs-table thead th:last-child {
  border-radius: 0 8px 0 0;
}

.specs-table tbody tr {
  transition: background 0.2s;
}

.specs-table tbody tr:nth-child(odd) {
  background: #fff;
}

.specs-table tbody tr:nth-child(even) {
  background: #f5f8fb;
}

.specs-table tbody tr:hover {
  background: #eaf1fb;
}

.specs-table tbody td {
  padding: 10px 18px;
  border-bottom: 1px solid #e8edf2;
  color: #1e293b;
  vertical-align: top;
  word-break: break-word;
}

.specs-table tbody td:first-child {
  font-weight: 600;
  color: #0a2540;
  white-space: nowrap;
  background: rgba(26, 115, 232, 0.04);
}

.specs-table tbody tr:last-child td {
  border-bottom: none;
}

.specs-table tbody tr:last-child td:first-child {
  border-radius: 0 0 0 8px;
}

.specs-table tbody tr:last-child td:last-child {
  border-radius: 0 0 8px 0;
}

/* 响应式：移动端表格横向滚动提示 */
@media (max-width: 768px) {
  .specs-table-wrapper {
    position: relative;
  }
  .specs-table-wrapper::after {
    content: '← 左右滑动查看更多 →';
    display: block;
    text-align: center;
    font-size: 0.75rem;
    color: #94a3b8;
    padding: 6px 0 0;
  }
  .specs-table {
    min-width: 400px;
  }
  .specs-table thead th,
  .specs-table tbody td {
    padding: 8px 12px;
    font-size: 0.82rem;
  }
  .specs-table tbody td:first-child {
    white-space: normal;
    min-width: 100px;
  }
  .product-specs-section {
    margin: 24px 0 20px;
  }
}