/* 全局样式重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* 颜色变量定义 */
:root {
  --color-primary: #1a1a1a;
  --color-secondary: #333;
  --color-accent: #00E5FF;
  --color-text: #f5f5f5;
  --color-text-secondary: #aaa;
  --color-bg: #222;
  --color-bg-secondary: #2a2a2a;
  --color-border: #444;
  --color-shadow: rgba(0, 0, 0, 0.3);
  
  /* 间距变量 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 3rem;
  --spacing-xl: 5rem;
  
  /* 布局变量 */
  --container-max-width: 1200px;
  --header-height: 80px;
  --border-radius: 8px;
  --transition-speed: 0.3s;
}

/* 基础元素样式 */
html, body {
  font-family: 'Roboto', 'Noto Sans SC', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  scroll-behavior: smooth;
  overflow-x: hidden;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* 当移动菜单打开时防止背景滚动 */
body.menu-open {
  overflow: hidden;
}

h1, h2, h3, h4, h5, h6 {
  margin-bottom: var(--spacing-sm);
  line-height: 1.3;
  font-weight: 700;
}

p {
  margin-bottom: var(--spacing-sm);
}

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

a:hover {
  color: #fff;
}

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

/* 通用类 */
.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-xl) 0;
  position: relative;
}

.section-title {
  font-size: 2.5rem;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  position: relative;
  color: #fff;
}

.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--color-accent);
  margin: var(--spacing-sm) auto 0;
}

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

.mb-4 {
  margin-bottom: var(--spacing-md);
}

.mb-5 {
  margin-bottom: var(--spacing-lg);
}

.mt-4 {
  margin-top: var(--spacing-md);
}

.d-flex {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

/* 导航栏样式 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: rgba(26, 26, 26, 0.95);
  box-shadow: 0 2px 10px var(--color-shadow);
  z-index: 1000;
  transition: all var(--transition-speed);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--header-height);
}

/* LOGO样式 - 更新尺寸为130x40像素 */
.logo {
  display: flex;
  align-items: center;
  width: 130px;
  height: 40px;
}

/* LOGO图片尺寸调整 */
.logo-img {
  width: 130px;
  height: 40px;
  object-fit: contain;
}

/* LOGO SVG尺寸调整 */
.logo svg {
  width: 130px;
  height: 40px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  list-style: none;
}

.nav-links li {
  margin-left: var(--spacing-md);
}

.nav-links a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: all var(--transition-speed);
}

.nav-links a:hover {
  color: var(--color-accent);
  background-color: rgba(255, 255, 255, 0.05);
}

/* 语言选择器 - 更新以支持四种语言 */
.language-selector {
  position: relative;
}

.language-selector-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 8px 12px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition-speed);
  /* 增加宽度以适应更多语言选项 */
  min-width: 110px;
}

.language-selector-btn:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.language-dropdown {
  position: absolute;
  top: 100%;
  right: 0;
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  box-shadow: 0 5px 15px var(--color-shadow);
  display: none;
  flex-direction: column;
  /* 增加宽度以适应俄语文本 */
  min-width: 140px;
  z-index: 1001;
}

.language-dropdown.show {
  display: flex;
}

.lang-btn {
  background: none;
  border: none;
  color: var(--color-text);
  padding: 10px 15px;
  text-align: left;
  cursor: pointer;
  transition: all var(--transition-speed);
  /* 确保文本不会溢出 */
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* 添加默认选中语言按钮的样式 */
.lang-btn.active {
  background-color: var(--color-accent);
  color: #000;
  font-weight: 500;
  box-shadow: 0 2px 5px rgba(0, 229, 255, 0.3);
}

.lang-btn:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-accent);
}

/* 移动菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  padding: 8px;
  z-index: 1010; /* 确保按钮在移动菜单之上 */
}

/* 移动菜单 - 修复显示问题 */
.mobile-menu {
  position: fixed;
  top: 0;
  right: -100%; /* 初始位置在屏幕外 */
  width: 80%;
  max-width: 300px;
  height: 100vh;
  background-color: var(--color-bg-secondary);
  z-index: 1001;
  padding: var(--spacing-lg);
  transition: right var(--transition-speed) ease; /* 添加过渡效果 */
  display: flex;
  flex-direction: column;
  overflow-y: auto; /* 允许内容滚动 */
  box-shadow: -5px 0 15px var(--color-shadow); /* 添加阴影效果 */
}

/* 修复：当菜单激活时显示 */
.mobile-menu.active {
  right: 0; /* 显示在屏幕内 */
}

.mobile-menu-close {
  align-self: flex-end;
  background: none;
  border: none;
  color: var(--color-text);
  font-size: 1.5rem;
  cursor: pointer;
  margin-bottom: var(--spacing-md);
  padding: 8px;
}

.mobile-nav-links {
  list-style: none;
  margin-bottom: var(--spacing-lg);
}

.mobile-nav-links li {
  margin-bottom: var(--spacing-sm);
}

.mobile-nav-links a {
  color: var(--color-text);
  font-size: 1.2rem;
  display: block;
  padding: var(--spacing-xs) 0;
  transition: color var(--transition-speed), transform var(--transition-speed);
}

.mobile-nav-links a:hover {
  color: var(--color-accent);
  transform: translateX(5px); /* 添加悬停效果 */
}

/* 移动端语言选择器 - 更新以支持四种语言 */
.mobile-language-selector {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

/* 为移动菜单中的语言按钮添加活动状态样式 */
.mobile-language-selector .lang-btn.active {
  background-color: var(--color-accent);
  color: #000;
  font-weight: 500;
}

/* 确保移动端语言按钮有足够空间显示俄语 */
.mobile-language-selector .lang-btn {
  width: 100%;
  padding: 12px 15px;
  margin-bottom: 5px;
  text-align: center;
}

/* 英雄区 */
.hero {
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  position: relative;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 0, 0, 0.9), rgba(26, 26, 26, 0.8)), url('https://picsum.photos/id/1019/1920/1080') center/cover no-repeat;
  z-index: -1;
}

.hero-content {
  max-width: 800px;
  text-align: center;
  margin: 0 auto;
  padding: var(--spacing-md);
}

.hero-title {
  font-size: 3.5rem;
  margin-bottom: var(--spacing-md);
  color: #fff;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
  animation: fadeInDown 1s ease-out;
}

.hero-subtitle {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-secondary);
  animation: fadeInUp 1s ease-out 0.3s;
  animation-fill-mode: both;
}

.hero-cta {
  display: inline-block;
  background-color: var(--color-accent);
  color: #000;
  font-weight: 700;
  padding: 15px 30px;
  border-radius: 50px;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: all var(--transition-speed);
  animation: fadeInUp 1s ease-out 0.6s;
  animation-fill-mode: both;
}

.hero-cta:hover {
  background-color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 229, 255, 0.3);
}

/* LED灯光动画 */
.led-animation {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 50px;
  z-index: 1;
}

/* 公司图片展示 */
.company-gallery {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.company-gallery-item {
  position: relative;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 5px 15px var(--color-shadow);
  transition: all var(--transition-speed);
  /* 确保内容可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.company-gallery-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px var(--color-shadow);
}

.company-gallery-img {
  width: 100%;
  height: 250px;
  object-fit: cover;
  transition: all var(--transition-speed);
  /* 确保图片可见 */
  display: block !important;
  opacity: 1 !important;
}

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

.company-gallery-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  color: #fff;
  /* 确保文字可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.company-gallery-title {
  margin-bottom: var(--spacing-xs);
  font-size: 1.2rem;
  /* 确保标题可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

/* 产品系列 */
.product-series-tabs {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.product-series-tab {
  background: none;
  border: 2px solid var(--color-border);
  color: var(--color-text);
  padding: 10px 20px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-speed);
  font-weight: 500;
}

.product-series-tab:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.product-series-tab.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #000;
}

.product-series-content {
  display: none;
}

.product-series-content.active {
  display: block;
  animation: fadeIn 0.5s ease-out;
}

.product-items-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.product-item {
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 5px 15px var(--color-shadow);
  transition: all var(--transition-speed);
  position: relative;
  /* 确保产品项可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.product-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px var(--color-shadow);
}

.product-badge {
  position: absolute;
  top: 10px;
  right: 10px;
  background-color: var(--color-accent);
  color: #000;
  padding: 5px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 700;
  z-index: 1;
}

.product-item-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  /* 确保图片可见 */
  display: block !important;
  opacity: 1 !important;
}

.product-item-body {
  padding: var(--spacing-md);
  /* 确保内容可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.product-item-title {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
  /* 确保标题可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.product-item-specs {
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-xs);
  /* 确保规格可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.product-item-description {
  margin-bottom: var(--spacing-sm);
  /* 确保描述可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.product-item-features {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  /* 确保特性可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.product-feature-tag {
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 0.8rem;
}

/* 案例展示 */
.case-tabs {
  display: flex;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.case-tab {
  background: none;
  border: 2px solid var(--color-border);
  color: var(--color-text);
  padding: 10px 20px;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-speed);
  font-weight: 500;
}

.case-tab:hover {
  background-color: rgba(255, 255, 255, 0.05);
}

.case-tab.active {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #000;
}

.case-content {
  display: none;
}

.case-content.active {
  display: block;
  animation: fadeIn 0.5s ease-out;
}

.case-study-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.case-study-item {
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: 0 5px 15px var(--color-shadow);
  transition: all var(--transition-speed);
  /* 确保案例项可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.case-study-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px var(--color-shadow);
}

.case-study-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  /* 确保图片可见 */
  display: block !important;
  opacity: 1 !important;
}

.case-study-content {
  padding: var(--spacing-md);
  /* 确保内容可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.case-study-title {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-xs);
  /* 确保标题可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.case-study-location {
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--color-text-secondary);
  font-size: 0.9rem;
  margin-bottom: var(--spacing-sm);
  /* 确保位置信息可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.case-study-description {
  margin-bottom: var(--spacing-sm);
  /* 确保描述可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.case-study-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 500;
}

/* 资质认证 */
.cert-logos {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.cert-item {
  text-align: center;
  transition: all var(--transition-speed);
  /* 确保认证项可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.cert-item:hover {
  transform: translateY(-10px);
}

.cert-logo {
  width: 100px;
  height: 100px;
  object-fit: contain;
  margin-bottom: var(--spacing-sm);
  filter: grayscale(100%);
  transition: all var(--transition-speed);
  /* 确保认证图标可见 */
  display: block !important;
  opacity: 1 !important;
  margin: 0 auto var(--spacing-sm);
}

.cert-item:hover .cert-logo {
  filter: grayscale(0%);
}

/* 下载区块 */
.download-section {
  background-color: var(--color-bg-secondary);
}

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

.download-item {
  background-color: var(--color-bg);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  text-align: center;
  box-shadow: 0 5px 15px var(--color-shadow);
  transition: all var(--transition-speed);
  /* 确保下载项可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.download-item:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px var(--color-shadow);
}

.download-icon {
  font-size: 3rem;
  color: var(--color-accent);
  margin-bottom: var(--spacing-sm);
}

.download-item-title {
  margin-bottom: var(--spacing-xs);
  /* 确保标题可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.download-item-description {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  /* 确保描述可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-accent);
  color: #000;
  padding: 10px 20px;
  border-radius: 50px;
  font-weight: 500;
  transition: all var(--transition-speed);
}

.download-btn:hover {
  background-color: #fff;
  transform: translateY(-3px);
}

/* 联系我们 */
.contact-info {
  flex: 1;
  min-width: 300px;
  /* 确保联系信息可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

.contact-form-container {
  flex: 2;
  min-width: 300px;
}

.contact-form {
  background-color: var(--color-bg-secondary);
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  box-shadow: 0 5px 15px var(--color-shadow);
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  background-color: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 12px 15px;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  transition: all var(--transition-speed);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  background-color: rgba(255, 255, 255, 0.1);
}

.contact-submit {
  background-color: var(--color-accent);
  color: #000;
  border: none;
  padding: 12px 25px;
  border-radius: 50px;
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-speed);
}

.contact-submit:hover {
  background-color: #fff;
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 229, 255, 0.3);
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-md);
}

.social-link {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  border-radius: 50%;
  transition: all var(--transition-speed);
}

.social-link:hover {
  background-color: var(--color-accent);
  color: #000;
  transform: translateY(-3px);
}

/* 页脚 */
.footer {
  background-color: var(--color-bg-secondary);
  padding: var(--spacing-xl) 0 var(--spacing-md);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.footer-title {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
  position: relative;
}

.footer-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 3px;
  background: var(--color-accent);
  margin-top: var(--spacing-xs);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: var(--color-text-secondary);
  transition: all var(--transition-speed);
}

.footer-links a:hover {
  color: var(--color-accent);
  padding-left: 5px;
}

.copyright {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--color-border);
  color: var(--color-text-secondary);
}

/* 动画 */
@keyframes fadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

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

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

/* 滚动动画 */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* 响应式布局 */
@media (max-width: 1200px) {
  .product-items-grid,
  .case-study-grid,
  .download-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  :root {
    --spacing-xl: 4rem;
  }
  
  .hero-title {
    font-size: 3rem;
  }
  
  .hero-subtitle {
    font-size: 1.3rem;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  /* 调整语言选择器在平板上的显示 */
  .language-selector-btn {
    min-width: 100px;
    padding: 8px 10px;
  }
  
  .language-dropdown {
    min-width: 130px;
  }
}

/* 修复移动端媒体查询 */
@media (max-width: 768px) {
  :root {
    --spacing-xl: 3rem;
  }
  
  /* 显示移动菜单按钮，隐藏导航链接 */
  .nav-links {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  /* 调整语言选择器在移动端的显示 */
  .language-selector {
    margin-right: 10px;
  }
  
  .language-selector-btn {
    padding: 6px 10px;
    font-size: 0.9rem;
    /* 移动端减小宽度 */
    min-width: 90px;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-subtitle {
    font-size: 1.1rem;
  }
  
  .company-gallery,
  .product-items-grid,
  .case-study-grid,
  .download-grid {
    grid-template-columns: 1fr;
  }
  
  .cert-logos {
    gap: var(--spacing-md);
  }
  
  .cert-logo {
    width: 80px;
    height: 80px;
  }
  
  /* 修改：移动端导航菜单宽度限制为屏幕的80% */
  .mobile-menu {
    width: 80%; /* 确保宽度为80% */
    max-width: 300px; /* 设置最大宽度 */
    right: -100%; /* 初始位置在屏幕外，确保完全隐藏 */
    transition: right 0.3s ease-in-out; /* 平滑过渡效果 */
  }
  
  /* 确保移动菜单激活状态正确显示 */
  .mobile-menu.active {
    right: 0; /* 显示在屏幕内 */
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.5); /* 增强阴影效果 */
  }
  
  /* 调整移动菜单内部元素尺寸和间距 */
  .mobile-nav-links a {
    font-size: 1rem; /* 减小字体大小 */
    padding: 10px 0; /* 调整垂直间距 */
  }
  
  .mobile-language-selector .lang-btn {
    padding: 8px 12px; /* 调整按钮大小 */
    margin: 5px 0; /* 调整按钮间距 */
    /* 确保俄语文本不会溢出 */
    font-size: 0.9rem;
  }
  
  /* 调整联系表单在移动端的布局 */
  .d-flex {
    flex-direction: column;
  }
  
  .contact-info, 
  .contact-form-container {
    width: 100%;
  }
}

@media (max-width: 576px) {
  :root {
    --spacing-xl: 2.5rem;
    --spacing-lg: 2rem;
    --spacing-md: 1.5rem;
  }
  
  .hero-title {
    font-size: 2rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  /* 修改：保持移动菜单在超小屏幕上也是80%宽度 */
  .mobile-menu {
    width: 80%; /* 超小屏幕保持宽度为80% */
    max-width: 280px; /* 减小最大宽度 */
    padding: var(--spacing-md); /* 减小内边距 */
  }
  
  .mobile-menu-close {
    margin-bottom: var(--spacing-sm); /* 减小关闭按钮下方间距 */
  }
  
  .mobile-nav-links {
    margin-bottom: var(--spacing-md); /* 减小导航链接下方间距 */
  }
  
  .mobile-nav-links li {
    margin-bottom: 2px; /* 减小导航项间距 */
  }
  
  .mobile-nav-links a {
    font-size: 0.95rem; /* 进一步减小字体大小 */
    padding: 8px 0; /* 减小垂直间距 */
  }
  
  /* 调整产品标签页在小屏幕上的显示 */
  .product-series-tab,
  .case-tab {
    padding: 8px 15px;
    font-size: 0.9rem;
  }
  
  /* 超小屏幕上语言选择器调整 */
  .language-selector-btn {
    min-width: 80px;
    padding: 5px 8px;
    font-size: 0.85rem;
  }
  
  .language-dropdown {
    min-width: 120px;
  }
  
  .lang-btn {
    padding: 8px 12px;
    font-size: 0.85rem;
  }
}

/* 修复语言选择器显示问题 */
.language-dropdown.show {
  display: flex;
}

/* 修复案例展示区域的图片比例 */
.case-study-img {
  aspect-ratio: 16/9;
  object-fit: cover;
}

/* 确保多语言内容正确显示 */
[data-key] {
  transition: opacity 0.3s ease;
  /* 确保带data-key属性的元素可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

/* 修复移动端菜单层级问题 */
.mobile-menu {
  z-index: 1100;
}

/* 修复表单元素在暗色主题下的可读性 */
::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

/* 修复按钮焦点状态 */
button:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* 修复滚动条样式 */
::-webkit-scrollbar {
  width: 10px;
}

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

::-webkit-scrollbar-thumb {
  background: var(--color-border);
  border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--color-accent);
}

/* 修复内容可见性问题 */
.park-title, .park-description,
.garden-case-title, .garden-case-description,
.street-title, .street-description,
.cert-title, .cert-description {
  /* 确保案例和认证标题描述可见 */
  opacity: 1 !important;
  visibility: visible !important;
  display: block !important;
}

/* 修复图片加载问题 */
img[src^="https://picsum.photos"] {
  min-height: 100px;
  background-color: var(--color-bg-secondary);
  /* 添加加载中指示器 */
  position: relative;
}

img[src^="https://picsum.photos"]::before {
  content: "图片加载中...";
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--color-text-secondary);
  font-size: 0.9rem;
}

/* 修复动态生成内容的可见性 */
#park-series, #street-series {
  /* 确保动态生成的产品系列内容可见 */
  opacity: 1 !important;
  visibility: visible !important;
}

/* 修复多语言切换后内容不显示问题 */
html[lang="zh-CN"] [data-key],
html[lang="en"] [data-key],
html[lang="es"] [data-key],
html[lang="ru"] [data-key] { /* 添加俄语支持 */
  opacity: 1 !important;
  visibility: visible !important;
}

/* 添加移动菜单遮罩层 */
.mobile-menu-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.5);
  z-index: 1050;
  transition: opacity 0.3s ease;
}

/* 当移动菜单激活时显示遮罩层 */
.mobile-menu.active + .mobile-menu-overlay,
body.menu-open .mobile-menu-overlay {
  display: block;
}

/* 修复表单消息反馈样式 */
.form-message {
  margin-top: 15px;
  padding: 10px;
  border-radius: var(--border-radius);
  display: none;
}

.form-message.success {
  display: block;
  background-color: rgba(0, 255, 0, 0.1);
  border: 1px solid #00aa00;
  color: #00ff00;
}

.form-message.error {
  display: block;
  background-color: rgba(255, 0, 0, 0.1);
  border: 1px solid #aa0000;
  color: #ff5555;
}

.form-message.info {
  display: block;
  background-color: rgba(0, 0, 255, 0.1);
  border: 1px solid #0000aa;
  color: #5555ff;
}

/* 修复表单验证反馈 */
.invalid-feedback {
  display: none;
  color: #ff5555;
  font-size: 0.85rem;
  margin-top: -10px;
  margin-bottom: 10px;
}

.contact-form input.is-invalid,
.contact-form textarea.is-invalid {
  border-color: #ff5555;
}

.contact-form input.is-invalid + .invalid-feedback,
.contact-form textarea.is-invalid + .invalid-feedback {
  display: block;
}

/* 添加加载指示器样式 */
.spinner-container {
  display: none;
  text-align: center;
  margin-top: 15px;
}

.spinner {
  width: 30px;
  height: 30px;
  border: 3px solid rgba(0, 229, 255, 0.3);
  border-radius: 50%;
  border-top-color: var(--color-accent);
  animation: spin 1s linear infinite;
  margin: 0 auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* 修复LED灯光动画 */
.led-light {
  position: absolute;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 10px 2px var(--color-accent);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% {
    opacity: 0.3;
    transform: scale(0.8);
  }
  50% {
    opacity: 1;
    transform: scale(1.2);
  }
  100% {
    opacity: 0.3;
    transform: scale(0.8);
  }
}

/* ===== 新增 Banner 动态效果样式 ===== */

/* 粒子系统容器 */
.particle-container {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  z-index: 0;
}

/* 单个粒子样式 */
.particle {
  position: absolute;
  background-color: var(--color-accent);
  border-radius: 50%;
  pointer-events: none;
  box-shadow: 0 0 10px 2px var(--color-accent);
  opacity: 0.7;
  transition: transform 0.3s ease, opacity 0.3s ease;
}

/* 渐变覆盖层 */
.gradient-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, 
    rgba(26, 26, 26, 0.9) 0%,
    rgba(0, 0, 0, 0.85) 50%,
    rgba(26, 26, 26, 0.8) 100%
  );
  z-index: -1;
  animation: gradientShift 15s ease infinite;
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
  100% {
    background-position: 0% 50%;
  }
}

/* 文字光晕效果 */
.glow-text {
  color: #fff;
  text-shadow: 0 0 5px rgba(255, 255, 255, 0.5),
               0 0 10px rgba(0, 229, 255, 0.3),
               0 0 15px rgba(0, 229, 255, 0.2);
  animation: textGlow 3s ease-in-out infinite alternate;
}

.glow-text-subtle {
  color: var(--color-text);
  text-shadow: 0 0 3px rgba(255, 255, 255, 0.3),
               0 0 7px rgba(0, 229, 255, 0.2);
  animation: textGlowSubtle 4s ease-in-out infinite alternate;
}

@keyframes textGlow {
  0% {
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.5),
                 0 0 10px rgba(0, 229, 255, 0.3),
                 0 0 15px rgba(0, 229, 255, 0.2);
  }
  100% {
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.7),
                 0 0 20px rgba(0, 229, 255, 0.5),
                 0 0 30px rgba(0, 229, 255, 0.3);
  }
}

@keyframes textGlowSubtle {
  0% {
    text-shadow: 0 0 3px rgba(255, 255, 255, 0.3),
                 0 0 7px rgba(0, 229, 255, 0.2);
  }
  100% {
    text-shadow: 0 0 6px rgba(255, 255, 255, 0.5),
                 0 0 12px rgba(0, 229, 255, 0.3);
  }
}

/* 闪烁的LED灯效果 */
.led-effect {
  position: absolute;
  width: 4px;
  height: 4px;
  background-color: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 8px 2px var(--color-accent);
  animation: ledBlink 3s infinite;
  z-index: 1;
}

@keyframes ledBlink {
  0%, 100% {
    opacity: 0.3;
    box-shadow: 0 0 5px 1px var(--color-accent);
  }
  50% {
    opacity: 1;
    box-shadow: 0 0 15px 3px var(--color-accent);
  }
}

/* 流动光线效果 */
.flow-light {
  position: absolute;
  height: 2px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    var(--color-accent) 50%, 
    transparent 100%
  );
  animation: flowLight 8s linear infinite;
  z-index: 0;
}

@keyframes flowLight {
  0% {
    left: -100%;
    width: 100%;
    opacity: 0;
  }
  10% {
    opacity: 0.5;
  }
  80% {
    opacity: 0.5;
  }
  100% {
    left: 100%;
    width: 100%;
    opacity: 0;
  }
}

/* 响应式调整 */
@media (max-width: 768px) {
  /* 移动端减少粒子数量和效果复杂度 */
  .particle {
    box-shadow: 0 0 5px 1px var(--color-accent);
  }
  
  .flow-light {
    display: none; /* 在移动端隐藏流动光线效果 */
  }
  
  @keyframes textGlow {
    0% {
      text-shadow: 0 0 3px rgba(255, 255, 255, 0.5),
                   0 0 7px rgba(0, 229, 255, 0.3);
    }
    100% {
      text-shadow: 0 0 7px rgba(255, 255, 255, 0.7),
                   0 0 15px rgba(0, 229, 255, 0.5);
    }
  }
}

/* 优化动画性能 */
@media (prefers-reduced-motion: reduce) {
  .particle, .flow-light, .led-effect {
    animation: none;
  }
  
  .glow-text, .glow-text-subtle {
    animation: none;
    text-shadow: 0 0 5px rgba(0, 229, 255, 0.3);
  }
  
  .gradient-overlay {
    animation: none;
  }
}