/* ============================================
   河南华隆电气设备有限公司 - 全站样式表
   ============================================ */

:root {
  --color-primary: #c8161d;
  --color-secondary: #1a5fb4;
  --color-accent: #d4a017;
  --color-gray-900: #1a1a1a;
  --color-gray-800: #2d2d2d;
  --color-gray-700: #4a4a4a;
  --color-gray-600: #666666;
  --color-gray-500: #888888;
  --color-gray-400: #aaaaaa;
  --color-gray-300: #cccccc;
  --color-gray-200: #e5e5e5;
  --color-gray-100: #f2f2f2;
  --color-gray-50: #f8f8f8;
  --color-white: #ffffff;
  --color-success: #28a745;
  --color-warning: #ffc107;
  --color-danger: #dc3545;
  --font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --font-family-en: 'Segoe UI', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  --max-width: 1440px;
  --header-height: 90px;
  --header-height-mobile: 60px;
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 30px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.15);
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: var(--font-family);
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body[lang="en"],
body[lang="ru"],
body[lang="ar"] {
  font-family: var(--font-family-en);
}

body[lang="ar"] {
  direction: rtl;
}

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

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  color: var(--color-gray-900);
  line-height: 1.3;
}

h1 { font-size: 36px; }
h2 { font-size: 28px; }
h3 { font-size: 22px; }
h4 { font-size: 18px; }
h5 { font-size: 16px; }
h6 { font-size: 14px; }

p {
  margin-bottom: 15px;
}

input, textarea, select, button {
  font-family: inherit;
  font-size: inherit;
  outline: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 30px;
}

.section {
  padding: 80px 0;
}

.section-gray {
  background-color: var(--color-gray-50);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 36px;
  color: var(--color-gray-900);
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 2px;
}

.section-title p {
  color: var(--color-gray-500);
  font-size: 15px;
  margin-top: 25px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.section-title-en h2 {
  font-size: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
  border: 2px solid transparent;
  text-align: center;
  line-height: 1.5;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-primary), #e02027);
  color: var(--color-white);
  border-color: var(--color-primary);
}

.btn-primary:hover {
  background: linear-gradient(135deg, #a01217, var(--color-primary));
  border-color: #a01217;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(200, 22, 29, 0.3);
  color: var(--color-white);
}

.btn-secondary {
  background: linear-gradient(135deg, var(--color-secondary), #2176d4);
  color: var(--color-white);
  border-color: var(--color-secondary);
}

.btn-secondary:hover {
  background: linear-gradient(135deg, #144a8a, var(--color-secondary));
  border-color: #144a8a;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(26, 95, 180, 0.3);
  color: var(--color-white);
}

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

.btn-outline:hover {
  background: var(--color-white);
  color: var(--color-primary);
  transform: translateY(-2px);
}

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

.btn-outline-primary:hover {
  background: var(--color-primary);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-accent {
  background: linear-gradient(135deg, var(--color-accent), #e8b820);
  color: var(--color-white);
  border-color: var(--color-accent);
}

.btn-accent:hover {
  background: linear-gradient(135deg, #b08010, var(--color-accent));
  border-color: #b08010;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(212, 160, 23, 0.3);
  color: var(--color-white);
}

.btn-lg {
  padding: 15px 40px;
  font-size: 16px;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 13px;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  transition: all var(--transition-normal);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.site-header.scrolled {
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.08);
}

.header-top {
  background: linear-gradient(135deg, var(--color-gray-900), var(--color-gray-800));
  color: var(--color-gray-400);
  font-size: 13px;
  padding: 8px 0;
  transition: all var(--transition-normal);
}

.site-header.scrolled .header-top {
  padding: 5px 0;
  font-size: 12px;
}

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

.header-top-left {
  display: flex;
  align-items: center;
  gap: 25px;
}

.header-top-left span {
  display: flex;
  align-items: center;
  gap: 6px;
}

.header-top-left i {
  color: var(--color-accent);
  font-size: 14px;
}

.header-top-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.lang-switcher {
  display: flex;
  align-items: center;
  gap: 5px;
}

.lang-switcher a {
  color: var(--color-gray-400);
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 3px;
  transition: all var(--transition-fast);
}

.lang-switcher a:hover,
.lang-switcher a.active {
  color: var(--color-white);
  background: var(--color-primary);
}

.header-main {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
  transition: all var(--transition-normal);
}

.site-header.scrolled .header-main {
  padding: 12px 0;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  text-decoration: none;
}

.site-logo .logo-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 24px;
  font-weight: 700;
  transition: transform var(--transition-normal);
}

.site-logo:hover .logo-icon {
  transform: rotate(10deg) scale(1.05);
}

.site-logo .logo-text {
  display: flex;
  flex-direction: column;
}

.site-logo .logo-text .company-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-gray-900);
  line-height: 1.2;
}

.site-logo .logo-text .company-name-en {
  font-size: 11px;
  color: var(--color-gray-500);
  letter-spacing: 0.5px;
  margin-top: 3px;
  text-transform: uppercase;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 5px;
}

.main-nav > ul {
  display: flex;
  align-items: center;
}

.main-nav > ul > li {
  position: relative;
}

.main-nav > ul > li > a {
  display: block;
  padding: 10px 18px;
  color: var(--color-gray-800);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: color var(--transition-fast);
}

.main-nav > ul > li > a::after {
  content: '';
  position: absolute;
  bottom: 5px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 60%;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 1px;
  transition: transform var(--transition-normal);
}

.main-nav > ul > li:hover > a,
.main-nav > ul > li.active > a {
  color: var(--color-primary);
}

.main-nav > ul > li:hover > a::after,
.main-nav > ul > li.active > a::after {
  transform: translateX(-50%) scaleX(1);
}

.main-nav .submenu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 220px;
  background: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 10px 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: all var(--transition-normal);
  z-index: 100;
  border-top: 3px solid var(--color-primary);
}

.main-nav > ul > li:hover .submenu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.main-nav .submenu li a {
  display: block;
  padding: 10px 20px;
  color: var(--color-gray-700);
  font-size: 14px;
  transition: all var(--transition-fast);
  border-left: 3px solid transparent;
}

.main-nav .submenu li a:hover {
  color: var(--color-primary);
  background: var(--color-gray-50);
  border-left-color: var(--color-primary);
  padding-left: 25px;
}

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  cursor: pointer;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gray-800);
  border-radius: 2px;
  transition: all var(--transition-normal);
}

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

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

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

.mobile-nav {
  display: none;
  position: fixed;
  top: var(--header-height-mobile);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-white);
  z-index: 999;
  overflow-y: auto;
  padding: 20px 0;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.mobile-nav.active {
  transform: translateX(0);
}

.mobile-nav ul li a {
  display: block;
  padding: 15px 30px;
  color: var(--color-gray-800);
  font-size: 16px;
  font-weight: 500;
  border-bottom: 1px solid var(--color-gray-100);
  transition: all var(--transition-fast);
}

.mobile-nav ul li a:hover {
  color: var(--color-primary);
  background: var(--color-gray-50);
  padding-left: 35px;
}

/* Banner Styles */
.banner {
  position: relative;
  height: 100vh;
  min-height: 600px;
  max-height: 900px;
  margin-top: 0;
  overflow: hidden;
}

.banner-slider {
  position: relative;
  height: 100%;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease;
  display: flex;
  align-items: center;
}

.banner-slide.active {
  opacity: 1;
}

.banner-slide::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(26, 95, 180, 0.85) 0%, rgba(200, 22, 29, 0.7) 100%);
  z-index: 1;
}

.banner-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.banner-content {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 30px;
  color: var(--color-white);
}

.banner-content .banner-subtitle {
  font-size: 18px;
  color: var(--color-accent);
  margin-bottom: 20px;
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: slideUp 0.8s ease forwards;
  opacity: 0;
}

.banner-content h1 {
  font-size: 56px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 25px;
  line-height: 1.2;
  animation: slideUp 0.8s ease 0.2s forwards;
  opacity: 0;
}

.banner-content p {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 40px;
  max-width: 600px;
  line-height: 1.8;
  animation: slideUp 0.8s ease 0.4s forwards;
  opacity: 0;
}

.banner-content .banner-buttons {
  display: flex;
  gap: 20px;
  animation: slideUp 0.8s ease 0.6s forwards;
  opacity: 0;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(40px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.banner-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 3;
}

.banner-dots span {
  width: 40px;
  height: 4px;
  background: rgba(255, 255, 255, 0.4);
  border-radius: 2px;
  cursor: pointer;
  transition: all var(--transition-normal);
}

.banner-dots span.active {
  background: var(--color-white);
  width: 60px;
}

.banner-arrows {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 3;
  width: 100%;
  display: flex;
  justify-content: space-between;
  padding: 0 30px;
}

.banner-arrow {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.2);
  border: 2px solid rgba(255, 255, 255, 0.5);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 18px;
}

.banner-arrow:hover {
  background: var(--color-white);
  color: var(--color-primary);
  border-color: var(--color-white);
  transform: scale(1.1);
}

/* Features */
.features {
  padding: 60px 0;
  background: var(--color-white);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.feature-item {
  text-align: center;
  padding: 30px 20px;
  border-radius: var(--radius-lg);
  transition: all var(--transition-normal);
  position: relative;
  overflow: hidden;
}

.feature-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  transform: scaleX(0);
  transition: transform var(--transition-normal);
}

.feature-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.feature-item:hover::before {
  transform: scaleX(1);
}

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  background: linear-gradient(135deg, rgba(200, 22, 29, 0.1), rgba(212, 160, 23, 0.1));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: var(--color-primary);
  transition: all var(--transition-normal);
}

.feature-item:hover .feature-icon {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  transform: rotate(10deg) scale(1.1);
}

.feature-item h3 {
  font-size: 18px;
  margin-bottom: 12px;
  color: var(--color-gray-900);
}

.feature-item p {
  font-size: 14px;
  color: var(--color-gray-500);
  line-height: 1.7;
  margin-bottom: 0;
}

/* Products */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

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

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

.product-image {
  position: relative;
  overflow: hidden;
  aspect-ratio: 4/3;
  background: var(--color-gray-100);
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
  transform: scale(1.1);
}

.product-tag {
  position: absolute;
  top: 15px;
  left: 15px;
  padding: 5px 12px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 12px;
  border-radius: 20px;
  z-index: 2;
}

.product-tag.new {
  background: var(--color-accent);
}

.product-tag.hot {
  background: var(--color-primary);
}

.product-info {
  padding: 20px;
}

.product-info h3 {
  font-size: 16px;
  margin-bottom: 10px;
  color: var(--color-gray-900);
  transition: color var(--transition-fast);
}

.product-card:hover .product-info h3 {
  color: var(--color-primary);
}

.product-info p {
  font-size: 13px;
  color: var(--color-gray-500);
  line-height: 1.6;
  margin-bottom: 15px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.product-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 15px;
  border-top: 1px solid var(--color-gray-100);
}

.product-meta .product-model {
  font-size: 12px;
  color: var(--color-gray-400);
}

.product-meta .view-more {
  font-size: 13px;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: 5px;
  transition: gap var(--transition-fast);
}

.product-card:hover .product-meta .view-more {
  gap: 8px;
}

/* About Section */
.about-section {
  padding: 100px 0;
  background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-800) 100%);
  position: relative;
  overflow: hidden;
}

.about-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(200, 22, 29, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.about-section::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(26, 95, 180, 0.15) 0%, transparent 70%);
  border-radius: 50%;
}

.about-wrap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  position: relative;
  z-index: 1;
}

.about-images {
  position: relative;
}

.about-img-main {
  width: 100%;
  aspect-ratio: 4/3;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}

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

.about-img-sub {
  position: absolute;
  bottom: -30px;
  right: -30px;
  width: 220px;
  aspect-ratio: 1;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
  border: 8px solid var(--color-gray-900);
}

.about-img-sub img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-text .section-title {
  text-align: left;
  margin-bottom: 30px;
}

.about-text .section-title h2 {
  color: var(--color-white);
  text-align: left;
}

.about-text .section-title h2::after {
  left: 0;
  transform: none;
}

.about-text .section-title p {
  color: var(--color-gray-400);
  margin-left: 0;
}

.about-desc {
  color: var(--color-gray-300);
  font-size: 15px;
  line-height: 1.9;
  margin-bottom: 30px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-bottom: 40px;
  padding: 30px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.stat-number {
  font-size: 42px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 8px;
}

.stat-label {
  font-size: 14px;
  color: var(--color-gray-400);
}

/* News Section */
.news-section {
  padding: 100px 0;
}

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

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

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

.news-image {
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
}

.news-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.news-card:hover .news-image img {
  transform: scale(1.1);
}

.news-category {
  position: absolute;
  top: 15px;
  left: 15px;
  padding: 5px 12px;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 12px;
  border-radius: 20px;
}

.news-content {
  padding: 25px;
}

.news-date {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-gray-400);
  font-size: 13px;
  margin-bottom: 12px;
}

.news-content h3 {
  font-size: 18px;
  margin-bottom: 15px;
  line-height: 1.5;
  transition: color var(--transition-fast);
}

.news-card:hover .news-content h3 {
  color: var(--color-primary);
}

.news-content h3 a {
  color: inherit;
}

.news-excerpt {
  font-size: 14px;
  color: var(--color-gray-500);
  line-height: 1.7;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 20px;
}

.news-more {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: var(--color-primary);
  font-size: 14px;
  font-weight: 500;
  transition: gap var(--transition-fast);
}

.news-card:hover .news-more {
  gap: 10px;
}

/* Certificates */
.certificates-section {
  padding: 100px 0;
  background: var(--color-gray-50);
}

.certificates-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.certificate-item {
  background: var(--color-white);
  border-radius: var(--radius-md);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
}

.certificate-item:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.certificate-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 15px;
  background: linear-gradient(135deg, rgba(212, 160, 23, 0.15), rgba(200, 22, 29, 0.1));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  color: var(--color-accent);
}

.certificate-item h4 {
  font-size: 14px;
  color: var(--color-gray-800);
  line-height: 1.4;
}

/* Cases */
.cases-section {
  padding: 100px 0;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.case-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
  cursor: pointer;
}

.case-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.case-card:hover img {
  transform: scale(1.1);
}

.case-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(to top, rgba(26, 26, 26, 0.95) 0%, rgba(26, 26, 26, 0.4) 50%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 30px;
  transition: all var(--transition-normal);
}

.case-card:hover .case-overlay {
  background: linear-gradient(to top, rgba(200, 22, 29, 0.95) 0%, rgba(200, 22, 29, 0.5) 50%, transparent 100%);
}

.case-overlay h3 {
  color: var(--color-white);
  font-size: 20px;
  margin-bottom: 10px;
}

.case-overlay p {
  color: rgba(255, 255, 255, 0.8);
  font-size: 14px;
  margin-bottom: 0;
  transform: translateY(20px);
  opacity: 0;
  transition: all var(--transition-normal);
}

.case-card:hover .case-overlay p {
  transform: translateY(0);
  opacity: 1;
}

/* Partners */
.partners-section {
  padding: 80px 0;
  background: var(--color-white);
  border-top: 1px solid var(--color-gray-100);
}

.partners-slider {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 40px;
}

.partner-logo {
  width: 150px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: grayscale(100%);
  opacity: 0.5;
  transition: all var(--transition-normal);
  font-size: 16px;
  font-weight: 600;
  color: var(--color-gray-600);
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
}

.partner-logo:hover {
  filter: grayscale(0%);
  opacity: 1;
  transform: scale(1.05);
  color: var(--color-primary);
}

/* Page Banner */
.page-banner {
  position: relative;
  height: 380px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  margin-top: var(--header-height);
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, rgba(26, 95, 180, 0.9) 0%, rgba(200, 22, 29, 0.8) 100%);
  z-index: 1;
}

.page-banner-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-banner-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
}

.page-banner-content h1 {
  font-size: 42px;
  color: var(--color-white);
  margin-bottom: 15px;
}

/* Breadcrumb */
.breadcrumb-section {
  background: var(--color-white);
  border-bottom: 1px solid var(--color-gray-100);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--color-gray-500);
  padding: 18px 0;
  margin-bottom: 0;
}

.breadcrumb a {
  color: var(--color-gray-500);
  transition: color var(--transition-fast);
}

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

.breadcrumb .separator {
  color: var(--color-gray-300);
  font-size: 12px;
}

.breadcrumb .current {
  color: var(--color-gray-800);
}

/* Page Sidebar */
.page-sidebar {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 40px;
  padding: 60px 0;
}

.sidebar-menu {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  height: fit-content;
  position: sticky;
  top: 120px;
}

.sidebar-menu-title {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  padding: 25px;
  font-size: 20px;
  font-weight: 600;
}

.sidebar-menu ul li a {
  display: block;
  padding: 15px 25px;
  color: var(--color-gray-700);
  font-size: 15px;
  border-bottom: 1px solid var(--color-gray-100);
  transition: all var(--transition-fast);
  position: relative;
}

.sidebar-menu ul li a::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--color-primary);
  transition: height var(--transition-fast);
}

.sidebar-menu ul li a:hover,
.sidebar-menu ul li.active a {
  color: var(--color-primary);
  background: var(--color-gray-50);
  padding-left: 30px;
}

.sidebar-menu ul li a:hover::before,
.sidebar-menu ul li.active a::before {
  height: 100%;
}

/* Footer */
.site-footer {
  background: linear-gradient(180deg, var(--color-gray-900) 0%, #0d0d0d 100%);
  color: var(--color-gray-400);
  padding-top: 70px;
}

.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 50px;
}

.footer-col h4 {
  color: var(--color-white);
  font-size: 16px;
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 12px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 35px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
  border-radius: 1px;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  color: var(--color-gray-400);
  font-size: 14px;
  transition: all var(--transition-fast);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.footer-col ul li a::before {
  content: '>';
  color: var(--color-primary);
  opacity: 0;
  transform: translateX(-10px);
  transition: all var(--transition-fast);
}

.footer-col ul li a:hover {
  color: var(--color-white);
  padding-left: 5px;
}

.footer-col ul li a:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.footer-about p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 20px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.footer-logo-icon {
  width: 42px;
  height: 42px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 20px;
  font-weight: 700;
}

.footer-logo-text {
  color: var(--color-white);
  font-size: 16px;
  font-weight: 600;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  font-size: 13px;
  color: var(--color-gray-500);
}

.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 15px;
}

/* Back to Top */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  z-index: 999;
  box-shadow: 0 4px 15px rgba(200, 22, 29, 0.3);
  font-size: 18px;
}

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

.back-to-top:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(200, 22, 29, 0.4);
}

/* Wechat Float */
.wechat-float {
  position: fixed;
  right: 30px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 998;
  width: 160px;
  background: var(--color-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  transition: all var(--transition-normal);
}

.wechat-float.hidden {
  opacity: 0;
  visibility: hidden;
  transform: translateY(-50%) translateX(200px);
}

.wechat-float-header {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  padding: 12px 15px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.wechat-float-header span {
  font-size: 14px;
  font-weight: 600;
}

.wechat-float-close {
  width: 22px;
  height: 22px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  border-radius: 50%;
  cursor: pointer;
  transition: background var(--transition-fast);
  font-size: 14px;
  line-height: 1;
}

.wechat-float-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.wechat-float-body {
  padding: 15px;
  text-align: center;
}

.wechat-qrcode {
  width: 130px;
  height: 130px;
  margin: 0 auto 12px;
  background: var(--color-gray-50);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.wechat-qrcode svg {
  width: 100%;
  height: 100%;
}

.wechat-float-body p {
  font-size: 13px;
  color: var(--color-gray-600);
  margin-bottom: 0;
  line-height: 1.5;
}

.wechat-float-toggle {
  position: fixed;
  right: 30px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 997;
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #07c160, #06ad56);
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(7, 193, 96, 0.4);
  transition: all var(--transition-normal);
  font-size: 22px;
}

.wechat-float-toggle svg {
  width: 26px;
  height: 26px;
  display: block;
}

.wechat-float-toggle.show {
  display: flex;
}

.wechat-float-toggle:hover {
  transform: translateY(-50%) scale(1.1);
  box-shadow: 0 6px 20px rgba(7, 193, 96, 0.5);
}

/* Animations */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-on-scroll.animated {
  opacity: 1;
  transform: translateY(0);
}

/* Responsive */
@media (max-width: 1200px) {
  .container {
    padding: 0 20px;
  }

  h1 { font-size: 32px; }
  h2 { font-size: 24px; }

  .section {
    padding: 60px 0;
  }

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

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

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

  .footer-qrcode {
    grid-column: span 3;
    text-align: left;
  }

  .banner-content h1 {
    font-size: 44px;
  }
}

@media (max-width: 992px) {
  .main-nav {
    display: none;
  }

  .mobile-menu-btn {
    display: flex;
  }

  .mobile-nav {
    display: block;
  }

  .header-top-left .welcome-text {
    display: none;
  }

  .banner {
    min-height: 500px;
    max-height: 700px;
  }

  .banner-content h1 {
    font-size: 36px;
  }

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

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

  .about-wrap {
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .page-sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar-menu {
    position: static;
  }

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

  .footer-col:first-child {
    grid-column: span 2;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: var(--header-height-mobile);
  }

  body {
    font-size: 14px;
  }

  .container {
    padding: 0 15px;
  }

  h1 { font-size: 26px; }
  h2 { font-size: 22px; }
  h3 { font-size: 18px; }

  .section {
    padding: 50px 0;
  }

  .header-top {
    display: none;
  }

  .banner {
    min-height: 400px;
    max-height: 500px;
  }

  .banner-content h1 {
    font-size: 28px;
  }

  .banner-content p {
    font-size: 14px;
    margin-bottom: 25px;
  }

  .banner-content .banner-buttons {
    gap: 12px;
  }

  .btn {
    padding: 10px 24px;
    font-size: 14px;
  }

  .features-grid,
  .products-grid,
  .news-grid,
  .cases-grid {
    grid-template-columns: 1fr;
  }

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

  .about-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    padding: 20px 0;
  }

  .stat-number {
    font-size: 28px;
  }

  .page-banner {
    height: 250px;
  }

  .page-banner-content h1 {
    font-size: 28px;
  }

  .footer-main {
    grid-template-columns: 1fr;
    gap: 25px;
    padding-bottom: 35px;
  }

  .footer-col:first-child {
    grid-column: span 1;
  }

  .footer-bottom .container {
    flex-direction: column;
    text-align: center;
  }

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

  .wechat-float {
    right: 15px;
    width: 140px;
  }

  .wechat-qrcode {
    width: 110px;
    height: 110px;
  }

  .wechat-float-toggle {
    right: 15px;
    width: 44px;
    height: 44px;
    font-size: 18px;
  }
}

@media (max-width: 480px) {
  h1 { font-size: 22px; }
  h2 { font-size: 20px; }

  .banner {
    min-height: 350px;
  }

  .banner-content h1 {
    font-size: 24px;
  }

  .banner-content .banner-buttons {
    flex-direction: column;
    align-items: flex-start;
  }

  .banner-content .banner-buttons .btn {
    width: auto;
  }

  .about-stats {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .section-title h2 {
    font-size: 22px;
  }

  .wechat-float {
    width: 130px;
  }

  .wechat-qrcode {
    width: 100px;
    height: 100px;
  }
}

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

:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

::selection {
  background: var(--color-primary);
  color: var(--color-white);
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--color-gray-100);
}

::-webkit-scrollbar-thumb {
  background: linear-gradient(180deg, var(--color-primary), var(--color-accent));
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: linear-gradient(180deg, #a01217, #b08010);
}

/* Manufacturing Section */
.manufacturing-section {
  padding: 80px 0;
  background: var(--color-gray-50);
}

.manufacturing-wrap {
  display: flex;
  flex-direction: column;
  gap: 50px;
}

.manufacturing-main {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 50px;
  align-items: center;
}

.manuf-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.manuf-image svg,
.manuf-image img {
  width: 100%;
  height: auto;
  display: block;
}

.manuf-info h3 {
  font-size: 26px;
  color: var(--color-gray-900);
  margin-bottom: 20px;
  line-height: 1.4;
}

.manuf-info p {
  line-height: 1.8;
  color: var(--color-gray-600);
  margin-bottom: 15px;
  text-indent: 2em;
}

.manuf-features {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 25px;
}

.manuf-feature {
  background: var(--color-white);
  padding: 25px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition-normal);
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.manuf-feature:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.manuf-feature-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  color: var(--color-white);
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.manuf-feature-icon svg {
  width: 32px;
  height: 32px;
}

.manuf-feature-content h4 {
  font-size: 16px;
  color: var(--color-gray-900);
  margin-bottom: 8px;
}

.manuf-feature-content p {
  font-size: 13px;
  color: var(--color-gray-500);
  line-height: 1.6;
  margin-bottom: 0;
  text-indent: 0;
}

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

  .manuf-info {
    order: -1;
  }

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

@media (max-width: 480px) {
  .manufacturing-section {
    padding: 50px 0;
  }

  .manuf-info h3 {
    font-size: 22px;
  }

  .manuf-features {
    grid-template-columns: 1fr;
    gap: 15px;
  }

  .manuf-feature {
    flex-direction: row;
    align-items: center;
    padding: 20px;
  }

  .manuf-feature-icon {
    width: 48px;
    height: 48px;
  }

  .manuf-feature-icon svg {
    width: 26px;
    height: 26px;
  }
}