/* ========================================
   Lumina户外景观灯 - 主样式表
   设计理念：极简实用、明亮专业
   ======================================== */

/* CSS变量定义 */
:root {
  /* 品牌色 */
  --color-primary: #18acbd;      /* 科技蓝 */
  --color-accent: #FFD700;       /* 日光黄 */
  --color-accent-alt: #FF6B35;   /* 活力橙 */
  
  /* 中性色 */
  --color-bg: #FFFFFF;
  --color-bg-alt: #F5F7FA;
  --color-text: #333333;
  --color-text-muted: #666666;
  --color-border: #E5E5E5;
  
  /* 字体 */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', sans-serif;
  
  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* 字体大小 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  
  /* 容器宽度 */
  --max-width: 1400px;
  
  /* 过渡 */
  --transition: all 0.3s ease;
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

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

/* ========================================
   Header - 固定顶部导航
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  z-index: 1000;
  box-shadow: var(--shadow-sm);
}

.header-container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-sm) var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-md);
}

.header-logo {
  flex-shrink: 0;
}

.logo-text {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.header-nav {
  display: flex;
  gap: var(--spacing-lg);
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--spacing-xs) 0;
  position: relative;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

.cta-button {
  background: var(--color-primary);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  transition: var(--transition);
  flex-shrink: 0;
}

.cta-button:hover {
  background: #0056b3;
  transform: translateY(-1px);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  color: var(--color-text);
}

/* ========================================
   Hero Section - 首屏核心
   ======================================== */
.hero {
  position: relative;
  padding-top: 120px;
  min-height: 90vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

/* 背景图层 */
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url('https://coze-coding-project.tos.coze.site/coze_storage_7617645301704294400/image/generate_image_b90994fe-7954-4290-85bb-cef920f0ab72.jpeg?sign=1805161176-9cacc5f2d5-0-ff5e54f15b2692ab66af48737ba3f998e3a6d9ce9f0cf7d3f6133220694da491');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: 0;
}

/* 遮罩层 - 渐变半透明黑色 */
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    135deg,
    rgba(0, 0, 0, 0.65) 0%,
    rgba(0, 0, 0, 0.45) 50%,
    rgba(0, 0, 0, 0.55) 100%
  );
  z-index: 1;
}

.hero-container {
  position: relative;
  z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: var(--spacing-2xl) var(--spacing-md);
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.hero-content {
  max-width: 700px;
}

.hero-title {
  font-size: var(--text-5xl);
  font-weight: 700;
  line-height: 1.2;
  color: #FFFFFF;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.03em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: var(--spacing-xl);
  line-height: 1.7;
  text-shadow: 0 1px 10px rgba(0, 0, 0, 0.3);
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-size: var(--text-base);
  font-weight: 600;
  transition: var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
}

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

.btn-primary:hover {
  background: #0056b3;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 123, 255, 0.4);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.15);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.25);
  border-color: #FFFFFF;
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

/* ========================================
   Product Showcase Grid - 产品网格
   ======================================== */
.products {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -0.02em;
}

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

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.product-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: var(--transition);
}

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

.product-image {
  width: 100%;
  height: 240px;
  background: var(--color-bg-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.product-info {
  padding: var(--spacing-md);
}

.product-name {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.product-model {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-sm);
}

.product-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.feature-tag {
  background: var(--color-bg-alt);
  color: var(--color-text-muted);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 500;
}

.product-actions {
  display: flex;
  gap: var(--spacing-sm);
}

.link-btn {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.link-btn:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.link-btn-primary {
  color: var(--color-primary);
  font-weight: 600;
}

.link-btn-primary:hover {
  color: #0056b3;
}

/* ========================================
   Technical Specs Table - 技术参数表
   ======================================== */
.specs {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg-alt);
}

.specs .section-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.specs .section-title,
.specs .section-subtitle {
  margin-bottom: 0;
}

/* 下载按钮样式 */
.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: #217346;
  color: white;
  border: none;
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  font-family: var(--font-family);
}

.download-btn:hover {
  background: #1a5c38;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(33, 115, 70, 0.3);
}

.download-btn:active {
  transform: translateY(0);
}

.download-btn svg {
  flex-shrink: 0;
}

.table-wrapper {
  max-height: 600px;
  overflow-x: auto;
  overflow-y: auto;
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  position: relative;
}

/* 自定义滚动条样式 */
.table-wrapper::-webkit-scrollbar {
  width: 8px;
  height: 10px;
}

.table-wrapper::-webkit-scrollbar-track {
  background: var(--color-bg-alt);
  border-radius: 4px;
}

.table-wrapper::-webkit-scrollbar-thumb {
  background: var(--color-primary);
  border-radius: 4px;
}

.table-wrapper::-webkit-scrollbar-thumb:hover {
  background: #0056b3;
}

.table-wrapper::-webkit-scrollbar-corner {
  background: var(--color-bg-alt);
}

.specs-table {
  border-collapse: collapse;
  font-size: var(--text-sm);
  width: 1500px;
}

.specs-table thead {
  background: var(--color-primary);
  color: white;
  position: sticky;
  top: 0;
  z-index: 20;
}

.specs-table th {
  padding: 16px 24px;
  text-align: center;
  font-weight: 600;
  font-size: var(--text-sm);
  white-space: nowrap;
  border-right: 1px solid rgba(255, 255, 255, 0.15);
  min-width: 120px;
}

.specs-table th:last-child {
  border-right: none;
}

/* 第一列参数名称 */
.specs-table th:first-child {
  text-align: left;
  min-width: 100px;
  position: sticky;
  left: 0;
  z-index: 25;
  background: var(--color-primary);
}

/* 产品列 */
.specs-table th:not(:first-child) {
  min-width: 120px;
}

.specs-table td {
  padding: 14px 24px;
  border-bottom: 1px solid var(--color-border);
  text-align: center;
  white-space: nowrap;
  font-size: var(--text-sm);
  border-right: 1px solid var(--color-border);
  min-width: 120px;
}

.specs-table td:last-child {
  border-right: none;
}

/* 第一列参数名称样式 - sticky固定 */
.specs-table td:first-child {
  font-weight: 600;
  color: var(--color-text);
  text-align: left;
  background: var(--color-bg);
  position: sticky;
  left: 0;
  z-index: 10;
  min-width: 100px;
  white-space: nowrap;
  /* border-right: 2px solid var(--color-primary); */
}

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

.specs-table tbody tr:nth-child(even) td:first-child {
  background: #F0F2F5;
}

.specs-table tbody tr:hover {
  background: #E8F4FF;
}

.specs-table tbody tr:hover td:first-child {
  background: #D8EEFF;
}

/* ========================================
   Application Scenarios - 应用场景
   ======================================== */
.scenarios {
  padding: var(--spacing-2xl) 0;
  background: var(--color-bg);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-lg);
}

.scenario-card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

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

.scenario-image {
  width: 100%;
  height: 240px;
  overflow: hidden;
}

.scenario-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

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

.scenario-content {
  padding: var(--spacing-md);
}

.scenario-title {
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-xs);
}

.scenario-desc {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ========================================
   Footer - 页脚
   ======================================== */
.footer {
  background: var(--color-bg-alt);
  border-top: 1px solid var(--color-border);
  padding: var(--spacing-2xl) 0 var(--spacing-md);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section {
  min-width: 200px;
}

.footer-title {
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
}

.contact-info p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--spacing-xs);
  line-height: 1.6;
}

.contact-info strong {
  color: var(--color-text);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

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

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

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

.footer-bottom p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}

/* ========================================
   响应式设计
   ======================================== */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
  .hero-title {
    font-size: var(--text-4xl);
  }
  
  .hero-content {
    max-width: 600px;
  }
}

/* Mobile Large (≤768px) */
@media (max-width: 768px) {
  .header-nav,
  .cta-button {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .header-nav.active {
    display: flex;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }
  
  .header-container {
    position: relative;
  }
  
  .cta-button.active {
    display: inline-block;
    position: absolute;
    top: calc(100% + 160px);
    left: var(--spacing-md);
    right: var(--spacing-md);
    text-align: center;
  }
  
  .hero {
    padding-top: 80px;
    min-height: 80vh;
  }
  
  .hero-container {
    padding: var(--spacing-xl) var(--spacing-md);
  }
  
  .hero-content {
    max-width: 100%;
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero-subtitle {
    font-size: var(--text-base);
  }
  
  .hero-buttons {
    justify-content: center;
    flex-wrap: wrap;
  }
  
  .section-title {
    font-size: var(--text-3xl);
  }
  
  .products-grid {
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
  }
  
  .scenarios-grid {
    grid-template-columns: 1fr;
  }
  
  .specs .section-header {
    flex-direction: column;
    align-items: flex-start;
  }
  
  .download-btn {
    width: 100%;
    justify-content: center;
  }
  
  .table-wrapper {
    max-height: 400px;
  }
  
  .specs-table {
    font-size: 12px;
  }
  
  .specs-table th,
  .specs-table td {
    padding: 10px 14px;
  }
  
  .specs-table th:first-child,
  .specs-table td:first-child {
    min-width: 80px;
    white-space: nowrap;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-links {
    align-items: center;
  }
}

/* Mobile Small (≤480px) */
@media (max-width: 480px) {
  :root {
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
  }
  
  .logo-text {
    font-size: var(--text-lg);
  }
  
  .hero-title {
    font-size: var(--text-2xl);
  }
  
  .hero-buttons {
    flex-direction: column;
    width: 100%;
  }
  
  .btn {
    width: 100%;
  }
  
  .product-card {
    min-width: 100%;
  }
  
  .product-actions {
    flex-direction: column;
    gap: var(--spacing-xs);
  }
}

/* 打印样式 */
@media print {
  .header,
  .cta-button,
  .hero-buttons {
    display: none;
  }
  
  .hero {
    padding-top: 0;
  }
}