/* ============================================
   中科鹏达官网 - 科技感主题样式
   ============================================ */

/* CSS 变量定义 */
:root {
  /* 背景色 */
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: rgba(17, 24, 39, 0.8);
  
  /* 科技蓝 */
  --tech-blue: #00d4ff;
  --tech-blue-dark: #0891b2;
  --tech-blue-light: #67e8f9;
  
  /* 数据绿 */
  --data-green: #10b981;
  --data-green-glow: #34d399;
  
  /* 能量橙 */
  --energy-orange: #f59e0b;
  --energy-orange-glow: #fbbf24;
  
  /* 电光紫 */
  --electric-purple: #8b5cf6;
  --electric-pink: #ec4899;
  
  /* 文字 */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.7);
  --text-muted: rgba(255, 255, 255, 0.5);
  
  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  
  /* 圆角 */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* 动画 */
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  
  /* 阴影 */
  --shadow-glow: 0 0 30px rgba(0, 212, 255, 0.3);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
}

/* 重置与基础 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

/* 科技感背景网格 */
.tech-bg {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  background: 
    radial-gradient(ellipse at 20% 20%, rgba(0, 212, 255, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, rgba(16, 185, 129, 0.03) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 50%, rgba(139, 92, 246, 0.02) 0%, transparent 70%),
    var(--bg-primary);
}

.tech-bg::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;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* ============================================
   玻璃态卡片
   ============================================ */
.glass-card {
  background: rgba(17, 24, 39, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  transition: all 0.4s var(--ease-out-expo);
  position: relative;
  overflow: hidden;
}

.glass-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent, 
    rgba(0, 212, 255, 0.4), 
    transparent
  );
}

.glass-card:hover {
  transform: translateY(-4px);
  border-color: rgba(0, 212, 255, 0.3);
  box-shadow: 
    0 20px 40px rgba(0, 0, 0, 0.4),
    0 0 40px rgba(0, 212, 255, 0.1);
}

/* ============================================
   霓虹按钮
   ============================================ */
.neon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 1.75rem;
  background: linear-gradient(135deg, var(--tech-blue), var(--tech-blue-dark));
  border: none;
  border-radius: var(--radius-sm);
  color: #000;
  font-weight: 600;
  font-size: 0.95rem;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: all 0.3s var(--ease-out-expo);
  box-shadow: 
    0 0 20px rgba(0, 212, 255, 0.4),
    0 4px 12px rgba(0, 0, 0, 0.2);
  text-decoration: none;
}

.neon-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
  transition: left 0.5s;
}

.neon-btn:hover {
  transform: translateY(-2px);
  box-shadow: 
    0 0 30px rgba(0, 212, 255, 0.6),
    0 8px 24px rgba(0, 0, 0, 0.3);
}

.neon-btn:hover::before {
  left: 100%;
}

.neon-btn.secondary {
  background: transparent;
  border: 1px solid var(--tech-blue);
  color: var(--tech-blue);
  box-shadow: 0 0 15px rgba(0, 212, 255, 0.2);
}

.neon-btn.secondary:hover {
  background: rgba(0, 212, 255, 0.1);
  box-shadow: 0 0 25px rgba(0, 212, 255, 0.4);
}

/* ============================================
   数据展示框
   ============================================ */
.data-box {
  background: linear-gradient(135deg, 
    rgba(0, 212, 255, 0.08), 
    rgba(16, 185, 129, 0.04)
  );
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.data-box .label {
  font-size: 0.875rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
}

.data-box .value {
  font-size: 2rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--tech-blue), var(--data-green));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* 扫描线动画 */
@keyframes scan {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(100%); }
}

.scan-line::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--tech-blue), transparent);
  animation: scan 3s linear infinite;
}

/* ============================================
   标题样式
   ============================================ */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-xs);
  background: linear-gradient(135deg, var(--text-primary), var(--tech-blue));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-secondary);
  text-align: center;
  max-width: 600px;
  margin: 0 auto var(--spacing-xl);
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  color: var(--tech-blue);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--spacing-sm);
}

.section-tag::before {
  content: '';
  width: 20px;
  height: 2px;
  background: var(--tech-blue);
  box-shadow: 0 0 10px var(--tech-blue);
}

/* ============================================
   科技标签
   ============================================ */
.tech-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  padding: 0.375rem 0.875rem;
  background: rgba(0, 212, 255, 0.1);
  border: 1px solid rgba(0, 212, 255, 0.3);
  border-radius: 20px;
  font-size: 0.8rem;
  color: var(--tech-blue);
  font-weight: 500;
}

.tech-tag::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--tech-blue);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--tech-blue);
}

/* ============================================
   脉冲动画
   ============================================ */
@keyframes pulse-glow {
  0%, 100% { 
    box-shadow: 0 0 5px var(--tech-blue), 0 0 10px var(--tech-blue);
    opacity: 1;
  }
  50% { 
    box-shadow: 0 0 20px var(--tech-blue), 0 0 30px var(--tech-blue);
    opacity: 0.8;
  }
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background: var(--data-green);
  border-radius: 50%;
  animation: pulse-glow 2s ease-in-out infinite;
}

/* ============================================
   容器
   ============================================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-2xl) 0;
  position: relative;
}

/* ============================================
   渐变边框
   ============================================ */
.gradient-border {
  position: relative;
  background: var(--bg-secondary);
  border-radius: var(--radius-lg);
}

.gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  padding: 1px;
  background: linear-gradient(135deg, var(--tech-blue), var(--electric-purple), var(--data-green));
  -webkit-mask: 
    linear-gradient(#fff 0 0) content-box, 
    linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

/* ============================================
   浮动动画
   ============================================ */
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50% { transform: translateY(-10px); }
}

.float {
  animation: float 4s ease-in-out infinite;
}

/* ============================================
   网格布局
   ============================================ */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

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

@media (max-width: 1024px) {
  .grid-3, .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   响应式调整
   ============================================ */
@media (max-width: 768px) {
  :root {
    --spacing-2xl: 2.5rem;
    --spacing-xl: 2rem;
  }
  
  .section-title {
    font-size: 1.75rem;
  }
  
  .section-subtitle {
    font-size: 1rem;
  }
}

/* 隐藏滚动条但保留功能 */
::-webkit-scrollbar {
  width: 6px;
}

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

::-webkit-scrollbar-thumb {
  background: rgba(0, 212, 255, 0.3);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: rgba(0, 212, 255, 0.5);
}