/* 元域科技官网 - 样式表 */
/* 设计风格：新能源/绿色科技 - 深色主题 */

/* ========== CSS变量定义 ========== */
:root {
  /* 颜色系统 */
  --primary-dark: #0A1628;
  --primary-mid: #1A2A4A;
  --primary-blue: #00D4FF;
  --accent-green: #00E676;
  --text-light: #FFFFFF;
  --text-muted: #B0B0B0;
  --text-dark: #1A1A1A;
  
  /* 渐变色 */
  --gradient-primary: linear-gradient(135deg, #0A1628 0%, #1A2A4A 100%);
  --gradient-blue: linear-gradient(135deg, #00D4FF 0%, #0099CC 100%);
  --gradient-green: linear-gradient(135deg, #00E676 0%, #00C853 100%);
  
  /* 间距系统 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;
  
  /* 过渡效果 */
  --transition-fast: 0.3s ease;
  --transition-smooth: 0.5s ease;
  
  /* 阴影 */
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.3);
  --shadow-glow-blue: 0 0 20px rgba(0, 212, 255, 0.3);
  --shadow-glow-green: 0 0 20px rgba(0, 230, 118, 0.3);
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
}

/* ========== 基础重置 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
  background: var(--primary-dark);
  color: var(--text-light);
  line-height: 1.6;
  overflow-x: hidden;
}

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

ul {
  list-style: none;
}

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

/* ========== 通用容器 ========== */
.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ========== 通用标题样式 ========== */
.section-title {
  font-size: 3rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-lg);
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  text-align: center;
  max-width: 600px;
  margin: -24px auto var(--spacing-lg);
}

/* ========== 导航栏 ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
  background: rgba(10, 22, 40, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  transition: var(--transition-smooth);
}

.header.scrolled {
  padding: var(--spacing-xs) 0;
  background: rgba(10, 22, 40, 0.98);
}

.nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.25rem;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

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

.nav-link {
  position: relative;
  font-size: 1rem;
  color: var(--text-light);
  padding: var(--spacing-xs) 0;
  transition: var(--transition-fast);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-blue);
  transition: var(--transition-fast);
}

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

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

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
}

.menu-toggle span {
  width: 25px;
  height: 3px;
  background: var(--text-light);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* ========== Hero区域 ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 80px;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 50%, rgba(0, 230, 118, 0.1) 0%, transparent 50%);
  pointer-events: none;
}

/* 动态网格背景 */
.hero-grid {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
}

.hero-badge {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary-blue);
  margin-bottom: var(--spacing-md);
}

.hero-title {
  font-size: 4rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

.hero-title .highlight {
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
  max-width: 600px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
  border: none;
}

.btn-primary {
  background: var(--gradient-blue);
  color: var(--text-light);
  box-shadow: var(--shadow-glow-blue);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--text-light);
  border: 2px solid var(--primary-blue);
}

.btn-secondary:hover {
  background: rgba(0, 212, 255, 0.1);
}

/* ========== 数据统计 ========== */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}

.stat-item {
  text-align: center;
  padding: var(--spacing-md);
  background: rgba(26, 42, 74, 0.5);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 212, 255, 0.1);
  transition: var(--transition-fast);
}

.stat-item:hover {
  transform: translateY(-5px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: var(--shadow-glow-blue);
}

.stat-number {
  font-size: 3rem;
  font-weight: 700;
  font-family: 'Orbitron', 'Rajdhani', sans-serif;
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-top: var(--spacing-xs);
}

/* ========== 业务板块 ========== */
.business-section {
  padding: var(--spacing-xl) 0;
  background: var(--primary-mid);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.business-card {
  position: relative;
  padding: var(--spacing-lg);
  background: var(--primary-dark);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.1);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.business-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-blue);
  opacity: 0;
  transition: var(--transition-fast);
}

.business-card:hover {
  transform: translateY(-10px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: var(--shadow-card);
}

.business-card:hover::before {
  opacity: 1;
}

.business-card-icon {
  width: 80px;
  height: 80px;
  background: var(--gradient-blue);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  margin-bottom: var(--spacing-md);
}

.business-card-icon.green {
  background: var(--gradient-green);
}

.business-card h3 {
  font-size: 1.75rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-light);
}

.business-card p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}

.business-features {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
}

.business-feature {
  padding: 6px 14px;
  background: rgba(0, 212, 255, 0.1);
  border-radius: 50px;
  font-size: 0.875rem;
  color: var(--primary-blue);
}

/* ========== 优势展示 ========== */
.features-section {
  padding: var(--spacing-xl) 0;
}

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

.feature-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: rgba(26, 42, 74, 0.3);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 212, 255, 0.05);
  transition: var(--transition-smooth);
}

.feature-item:hover {
  transform: translateY(-5px);
  background: rgba(26, 42, 74, 0.5);
  border-color: rgba(0, 212, 255, 0.2);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  background: rgba(0, 212, 255, 0.1);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.feature-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--text-muted);
}

/* ========== 页脚 ========== */
.footer {
  background: var(--primary-mid);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  border-top: 1px solid rgba(0, 212, 255, 0.1);
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  margin-bottom: var(--spacing-sm);
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.footer-section h4 {
  font-size: 1rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text-light);
}

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

.footer-links a {
  color: var(--text-muted);
  font-size: 0.875rem;
  transition: var(--transition-fast);
}

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

.footer-contact p {
  color: var(--text-muted);
  font-size: 0.875rem;
  margin-bottom: var(--spacing-xs);
}

.footer-bottom {
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.875rem;
}

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

.footer-bottom a:hover {
  text-decoration: underline;
}

/* ========== 页面通用样式 ========== */
.page-header {
  padding: 160px 0 var(--spacing-xl);
  text-align: center;
  position: relative;
  background: var(--gradient-primary);
}

.page-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
}

.page-header h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
  position: relative;
}

.page-header p {
  color: var(--text-muted);
  font-size: 1.125rem;
  max-width: 600px;
  margin: 0 auto;
  position: relative;
}

/* ========== 关于页面 ========== */
.about-content {
  padding: var(--spacing-xl) 0;
}

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  margin-bottom: var(--spacing-xl);
}

.about-intro-text h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
  background: linear-gradient(90deg, var(--primary-blue), var(--accent-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.about-intro-text p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

.about-intro-visual {
  position: relative;
  height: 400px;
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.1), rgba(0, 230, 118, 0.1));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(0, 212, 255, 0.2);
}

.about-intro-visual::before {
  content: '';
  position: absolute;
  width: 200px;
  height: 200px;
  background: var(--gradient-blue);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.3;
}

.vision-mission {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.vision-card,
.mission-card {
  padding: var(--spacing-lg);
  background: var(--primary-mid);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.vision-card h3,
.mission-card h3 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-sm);
  color: var(--primary-blue);
}

.vision-card p,
.mission-card p {
  color: var(--text-muted);
  line-height: 1.8;
}

/* ========== 服务页面 ========== */
.services-content {
  padding: var(--spacing-xl) 0;
}

.service-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: center;
  margin-bottom: var(--spacing-xl);
  padding: var(--spacing-lg);
  background: rgba(26, 42, 74, 0.3);
  border-radius: var(--radius-lg);
}

.service-detail:nth-child(even) {
  direction: rtl;
}

.service-detail:nth-child(even) > * {
  direction: ltr;
}

.service-detail h2 {
  font-size: 2rem;
  margin-bottom: var(--spacing-md);
}

.service-detail p {
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
  line-height: 1.8;
}

.service-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.service-list li {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  color: var(--text-muted);
}

.service-list li::before {
  content: '✓';
  color: var(--accent-green);
  font-weight: bold;
}

/* ========== 联系页面 ========== */
.contact-content {
  padding: var(--spacing-xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background: rgba(26, 42, 74, 0.3);
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: var(--gradient-blue);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  flex-shrink: 0;
}

.contact-item h4 {
  font-size: 1rem;
  margin-bottom: 4px;
}

.contact-item p {
  color: var(--text-muted);
  font-size: 0.875rem;
}

.contact-form {
  background: rgba(26, 42, 74, 0.3);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(0, 212, 255, 0.1);
}

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-group label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--primary-dark);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius-sm);
  color: var(--text-light);
  font-size: 1rem;
  transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-blue);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-muted);
  opacity: 0.6;
}

/* ========== 动画 ========== */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.animate-fadeInUp {
  animation: fadeInUp 0.6s ease forwards;
}

.animate-delay-1 { animation-delay: 0.1s; }
.animate-delay-2 { animation-delay: 0.2s; }
.animate-delay-3 { animation-delay: 0.3s; }
.animate-delay-4 { animation-delay: 0.4s; }

/* ========== 响应式设计 ========== */
@media (max-width: 1200px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(10, 22, 40, 0.98);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-smooth);
  }
  
  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .menu-toggle {
    display: flex;
  }
  
  .hero-title {
    font-size: 2.5rem;
  }
  
  .hero-description {
    font-size: 1rem;
  }
  
  .stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .stat-number {
    font-size: 2rem;
  }
  
  .business-grid {
    grid-template-columns: 1fr;
  }
  
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .about-intro {
    grid-template-columns: 1fr;
  }
  
  .about-intro-visual {
    height: 250px;
  }
  
  .vision-mission {
    grid-template-columns: 1fr;
  }
  
  .service-detail {
    grid-template-columns: 1fr;
  }
  
  .service-detail:nth-child(even) {
    direction: ltr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  
  .footer-brand {
    max-width: 100%;
  }
  
  .footer-brand .logo {
    justify-content: center;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .page-header h1 {
    font-size: 2rem;
  }
}

/* ========== 滚动条美化 ========== */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--primary-dark);
}

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

::-webkit-scrollbar-thumb:hover {
  background: var(--primary-blue);
}