@charset "UTF-8";

/* ========================================
   史冬瑞文 - 科技未来主题 CSS
   Cyberpunk / Tech Style v2.0
   ======================================== */

/* CSS 变量定义 */
:root {
  /* 主色调 - 霓虹科技蓝 */
  --tech-primary: #00f0ff;
  --tech-primary-dark: #00a8b3;
  --tech-secondary: #7000ff;
  --tech-accent: #ff00a0;
  --tech-success: #00ff88;
  --tech-warning: #ffcc00;
  
  /* 背景色 */
  --tech-bg-dark: #0a0a0f;
  --tech-bg-card: rgba(20, 20, 35, 0.8);
  --tech-bg-glass: rgba(255, 255, 255, 0.05);
  
  /* 文字色 */
  --tech-text-primary: #ffffff;
  --tech-text-secondary: rgba(255, 255, 255, 0.7);
  --tech-text-muted: rgba(255, 255, 255, 0.5);
  
  /* 边框 */
  --tech-border: rgba(0, 240, 255, 0.3);
  --tech-border-glow: 0 0 20px rgba(0, 240, 255, 0.5);
  
  /* 渐变 */
  --tech-gradient-primary: linear-gradient(135deg, #00f0ff 0%, #7000ff 100%);
  --tech-gradient-glow: linear-gradient(180deg, rgba(0, 240, 255, 0.1) 0%, transparent 100%);
  
  /* 阴影 */
  --tech-shadow-glow: 0 0 30px rgba(0, 240, 255, 0.3);
  --tech-shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  
  /* 动画时间 */
  --tech-transition-fast: 0.2s ease;
  --tech-transition-normal: 0.4s ease;
  --tech-transition-slow: 0.4s ease;
}

/* ========================================
   基础重置与全局样式
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

/* 科技网格背景 */
body::before {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: 
    linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
  background-size: 50px 50px;
  pointer-events: none;
  z-index: -1;
}

/* 扫描线效果 */
body::after {
  content: '';
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    180deg,
    transparent 50%,
    rgba(0, 240, 255, 0.02) 50%
  );
  background-size: 100% 4px;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.3;
}

/* ========================================
   页面加载动画
   ======================================== */
.tech-loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--tech-bg-dark);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 99999;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}

.tech-loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.tech-loader-content {
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.tech-loader-logo {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: 2px;
  color: var(--tech-primary);
  margin-bottom: 30px;
  animation: tech-pulse 2s ease-in-out infinite;
  white-space: nowrap;
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.5), 0 0 40px rgba(0, 240, 255, 0.3);
}

.tech-loader-subtitle {
  font-size: 14px;
  color: var(--tech-text-muted);
  letter-spacing: 4px;
  text-transform: uppercase;
  margin-bottom: 40px;
}

.tech-loader-progress {
  width: 300px;
  height: 2px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 2px;
  overflow: hidden;
  position: relative;
}

.tech-loader-bar {
  height: 100%;
  background: var(--tech-gradient-primary);
  width: 0%;
  transition: width 0.3s ease;
  box-shadow: 0 0 20px var(--tech-primary);
}

.tech-loader-text {
  margin-top: 20px;
  font-size: 12px;
  color: var(--tech-text-muted);
  font-family: 'Courier New', monospace;
}

.tech-loader-status {
  margin-top: 10px;
  font-size: 11px;
  color: var(--tech-primary);
  font-family: 'Courier New', monospace;
  letter-spacing: 2px;
}

@keyframes tech-pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.98); }
}

/* ========================================
   光标跟随效果
   ======================================== */
.tech-cursor {
  position: fixed;
  width: 20px;
  height: 20px;
  border: 2px solid var(--tech-primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 99998;
  transition: transform 0.1s ease, opacity 0.3s ease;
  mix-blend-mode: difference;
}

.tech-cursor-dot {
  position: fixed;
  width: 6px;
  height: 6px;
  background: var(--tech-primary);
  border-radius: 50%;
  pointer-events: none;
  z-index: 99998;
  transition: transform 0.05s ease;
}

.tech-cursor-trail {
  position: fixed;
  width: 40px;
  height: 40px;
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 50%;
  pointer-events: none;
  z-index: 99997;
  transition: transform 0.3s ease;
}

/* ========================================
   粒子背景
   ======================================== */
.tech-particles {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  overflow: hidden;
}

.tech-particle {
  position: absolute;
  width: 2px;
  height: 2px;
  background: var(--tech-primary);
  border-radius: 50%;
  opacity: 0.6;
  animation: tech-float 15s infinite linear;
}

@keyframes tech-float {
  0% {
    transform: translateY(100vh) rotate(0deg);
    opacity: 0;
  }
  10% {
    opacity: 0.6;
  }
  90% {
    opacity: 0.6;
  }
  100% {
    transform: translateY(-100vh) rotate(720deg);
    opacity: 0;
  }
}

/* ========================================
   导航栏样式
   ======================================== */
.tech-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 80px;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 240, 255, 0.1);
  z-index: 1000;
  transition: all var(--tech-transition-normal);
}

.tech-nav.scrolled {
  background: rgba(10, 10, 15, 0.95);
  box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.tech-nav-container {
  max-width: 1400px;
  height: 100%;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 40px;
}

/* Logo 区域 */
.tech-nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.tech-nav-logo img {
  height: 42px;
  filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
  transition: filter var(--tech-transition-fast);
}

.tech-nav-logo:hover img {
  filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.8));
}

.tech-nav-logo-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.tech-nav-logo-text .brand-name {
  font-size: 18px;
  font-weight: 700;
  background: var(--tech-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}

.tech-nav-logo-text .brand-slogan {
  font-size: 11px;
  color: var(--tech-text-muted);
  letter-spacing: 2px;
  font-weight: 500;
}

/* 导航菜单 */
.tech-nav-menu {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.tech-nav-item {
  position: relative;
}

.tech-nav-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 10px 16px;
  color: var(--tech-text-secondary);
  text-decoration: none;
  font-size: 14px;
  font-weight: 500;
  transition: all var(--tech-transition-fast);
  position: relative;
  overflow: hidden;
  border-radius: 8px;
}

.tech-nav-link .nav-icon {
  font-size: 16px;
  opacity: 0.8;
  transition: all var(--tech-transition-fast);
}

.tech-nav-link:hover {
  color: var(--tech-primary);
  background: rgba(0, 240, 255, 0.1);
}

.tech-nav-link:hover .nav-icon {
  opacity: 1;
  transform: scale(1.1);
}

.tech-nav-link.active {
  color: var(--tech-primary);
  background: rgba(0, 240, 255, 0.15);
}

.tech-nav-link.active .nav-icon {
  opacity: 1;
}

/* 下拉箭头 */
.tech-nav-link .dropdown-arrow {
  font-size: 10px;
  margin-left: 2px;
  transition: transform var(--tech-transition-fast);
}

.tech-nav-item:hover .dropdown-arrow {
  transform: rotate(180deg);
}

/* 联系我们按钮 */
.tech-nav-cta {
  margin-left: 20px;
}

.tech-nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  background: linear-gradient(135deg, #00f0ff 0%, #7000ff 100%);
  color: white;
  text-decoration: none;
  font-size: 14px;
  font-weight: 600;
  border-radius: 8px;
  transition: all var(--tech-transition-fast);
  box-shadow: 0 4px 15px rgba(0, 240, 255, 0.3);
  position: relative;
  overflow: hidden;
}

.tech-nav-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 ease;
}

.tech-nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(0, 240, 255, 0.5);
}

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

/* 下拉菜单 */
.tech-dropdown {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 200px;
  background: rgba(20, 20, 35, 0.98);
  backdrop-filter: blur(20px);
  border: 1px solid var(--tech-border);
  border-radius: 12px;
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transition: all var(--tech-transition-fast);
  box-shadow: var(--tech-shadow-glow);
}

.tech-dropdown::before {
  content: '';
  position: absolute;
  top: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 0;
  border-left: 6px solid transparent;
  border-right: 6px solid transparent;
  border-bottom: 6px solid rgba(20, 20, 35, 0.98);
}

.tech-nav-item:hover .tech-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.tech-dropdown-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  color: var(--tech-text-secondary);
  text-decoration: none;
  font-size: 14px;
  transition: all var(--tech-transition-fast);
  border-radius: 8px;
  white-space: nowrap;
}

.tech-dropdown-item:hover {
  background: rgba(0, 240, 255, 0.1);
  color: var(--tech-primary);
}

.tech-dropdown-item::before {
  content: '›';
  font-size: 14px;
  color: var(--tech-primary);
  opacity: 0;
  transition: all var(--tech-transition-fast);
  margin-right: -10px;
}

.tech-dropdown-item:hover::before {
  opacity: 1;
  margin-right: 0;
}

/* ========================================
   英雄区（Hero Section）
   ======================================== */
.tech-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding-top: 80px;
}

.tech-hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
}

.tech-hero-bg::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: 
    radial-gradient(ellipse at 20% 50%, rgba(0, 240, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(112, 0, 255, 0.15) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(255, 0, 160, 0.1) 0%, transparent 50%);
}

.tech-hero-content {
  text-align: center;
  max-width: 900px;
  padding: 0 40px;
  position: relative;
  z-index: 1;
}

.tech-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 20px;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--tech-border);
  border-radius: 30px;
  font-size: 13px;
  color: var(--tech-primary);
  letter-spacing: 2px;
  margin-bottom: 30px;
  animation: tech-glow 2s ease-in-out infinite;
}

@keyframes tech-glow {
  0%, 100% { box-shadow: 0 0 10px rgba(0, 240, 255, 0.3); }
  50% { box-shadow: 0 0 25px rgba(0, 240, 255, 0.6); }
}

.tech-hero-title {
  font-size: 64px;
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 24px;
  letter-spacing: 4px;
}

.tech-hero-title .gradient-text {
  background: var(--tech-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tech-hero-subtitle {
  font-size: 20px;
  color: var(--tech-text-secondary);
  margin-bottom: 40px;
  line-height: 1.8;
}

.tech-hero-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* ========================================
   按钮样式
   ======================================== */
.tech-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: all var(--tech-transition-fast);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.tech-btn-primary {
  background: var(--tech-gradient-primary);
  color: white;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.3);
}

.tech-btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 240, 255, 0.5);
}

.tech-btn-primary::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 ease;
}

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

.tech-btn-secondary {
  background: transparent;
  color: var(--tech-primary);
  border: 1px solid var(--tech-border);
}

.tech-btn-secondary:hover {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--tech-primary);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

.tech-btn-glow {
  animation: tech-btn-pulse 2s ease-in-out infinite;
}

@keyframes tech-btn-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(0, 240, 255, 0.4); }
  50% { box-shadow: 0 0 40px rgba(0, 240, 255, 0.7); }
}

/* ========================================
   卡片样式
   ======================================== */
.tech-card {
  background: var(--tech-bg-card);
  backdrop-filter: blur(10px);
  border: 1px solid var(--tech-border);
  border-radius: 16px;
  padding: 30px;
  transition: all var(--tech-transition-normal);
  position: relative;
  overflow: hidden;
}

.tech-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: var(--tech-gradient-glow);
  opacity: 0;
  transition: opacity var(--tech-transition-normal);
}

.tech-card:hover {
  transform: translateY(-10px);
  border-color: var(--tech-primary);
  box-shadow: var(--tech-shadow-glow);
}

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

.tech-card-icon {
  width: 60px;
  height: 60px;
  background: var(--tech-gradient-primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 28px;
  box-shadow: 0 4px 20px rgba(0, 240, 255, 0.3);
}

.tech-card-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--tech-text-primary);
}

.tech-card-desc {
  font-size: 14px;
  color: var(--tech-text-secondary);
  line-height: 1.7;
}

/* ========================================
   区块标题
   ======================================== */
.tech-section {
  padding: 120px 0;
  position: relative;
}

/* 板块间颜色过渡，替代亮线 */
.tech-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 200px;
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.02) 0%, transparent 100%);
  pointer-events: none;
}

.tech-section:nth-child(even) {
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.015) 0%, transparent 50%, rgba(112, 0, 255, 0.015) 100%);
}

.tech-section-header {
  text-align: center;
  margin-bottom: 80px;
}

.tech-section-label {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid var(--tech-border);
  border-radius: 20px;
  font-size: 12px;
  color: var(--tech-primary);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 20px;
}

.tech-section-title {
  font-size: 42px;
  font-weight: 800;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.tech-section-title .highlight {
  background: var(--tech-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.tech-section-desc {
  font-size: 18px;
  color: var(--tech-text-secondary);
  max-width: 600px;
  margin: 0 auto;
}

/* ========================================
   数据展示
   ======================================== */
.tech-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
  max-width: 1000px;
  margin: 0 auto;
}

.tech-stat-item {
  text-align: center;
  padding: 30px;
  background: var(--tech-bg-glass);
  border: 1px solid var(--tech-border);
  border-radius: 12px;
  transition: all var(--tech-transition-fast);
}

.tech-stat-item:hover {
  border-color: var(--tech-primary);
  transform: translateY(-5px);
}

.tech-stat-number {
  font-size: 48px;
  font-weight: 800;
  background: var(--tech-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1;
  margin-bottom: 10px;
}

.tech-stat-label {
  font-size: 14px;
  color: var(--tech-text-secondary);
  letter-spacing: 1px;
}

/* ========================================
   特性列表
   ======================================== */
.tech-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.tech-feature {
  display: flex;
  gap: 20px;
  padding: 25px;
  background: var(--tech-bg-glass);
  border-radius: 12px;
  border: 1px solid transparent;
  transition: all var(--tech-transition-fast);
}

.tech-feature:hover {
  border-color: var(--tech-border);
  background: rgba(0, 240, 255, 0.05);
}

.tech-feature-icon {
  width: 50px;
  height: 50px;
  min-width: 50px;
  background: var(--tech-gradient-primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
}

.tech-feature-content h4 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.tech-feature-content p {
  font-size: 14px;
  color: var(--tech-text-secondary);
  line-height: 1.6;
}

/* ========================================
   时间线
   ======================================== */
.tech-timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.tech-timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--tech-gradient-primary);
  transform: translateX(-50%);
}

.tech-timeline-item {
  display: flex;
  justify-content: flex-end;
  padding-right: 50%;
  position: relative;
  margin-bottom: 50px;
}

.tech-timeline-item:nth-child(even) {
  justify-content: flex-start;
  padding-right: 0;
  padding-left: 50%;
}

.tech-timeline-dot {
  position: absolute;
  left: 50%;
  top: 0;
  width: 16px;
  height: 16px;
  background: var(--tech-bg-dark);
  border: 3px solid var(--tech-primary);
  border-radius: 50%;
  transform: translateX(-50%);
  box-shadow: 0 0 20px var(--tech-primary);
}

.tech-timeline-content {
  background: var(--tech-bg-card);
  border: 1px solid var(--tech-border);
  border-radius: 12px;
  padding: 25px;
  max-width: 350px;
  margin: 0 30px;
}

.tech-timeline-date {
  font-size: 12px;
  color: var(--tech-primary);
  letter-spacing: 2px;
  margin-bottom: 8px;
}

.tech-timeline-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.tech-timeline-desc {
  font-size: 14px;
  color: var(--tech-text-secondary);
}

/* ========================================
   底部样式 - 新版4列布局
   ======================================== */
.tech-footer {
  background: linear-gradient(180deg, rgba(10, 10, 20, 0.98) 0%, rgba(5, 5, 15, 0.99) 100%);
  padding: 80px 0 30px;
  position: relative;
}

/* 顶部渐变过渡，替代亮线 */
.tech-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100px;
  background: linear-gradient(180deg, rgba(0, 240, 255, 0.03) 0%, transparent 100%);
  pointer-events: none;
}

.tech-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 80px;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

/* 品牌区域 */
.tech-footer-brand {
  max-width: 380px;
}

.tech-footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.tech-footer-logo img {
  height: 48px;
  filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.5));
}

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

.tech-footer-logo-text .brand-name {
  font-size: 20px;
  font-weight: 700;
  background: var(--tech-gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 1px;
}

.tech-footer-logo-text .brand-slogan {
  font-size: 12px;
  color: var(--tech-text-muted);
  letter-spacing: 2px;
  margin-top: 2px;
}

.tech-footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  line-height: 1.8;
  margin-bottom: 24px;
}

/* 联系信息 */
.tech-footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 24px;
}

.tech-footer-contact-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
}

.tech-footer-contact-icon {
  font-size: 14px;
  color: var(--tech-primary);
}

/* 社交图标 */
.tech-footer-social {
  display: flex;
  gap: 12px;
}

.tech-footer-social-link {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 18px;
  transition: all var(--tech-transition-fast);
}

.tech-footer-social-link:hover {
  background: rgba(0, 240, 255, 0.1);
  border-color: var(--tech-primary);
  color: var(--tech-primary);
  transform: translateY(-3px);
}

/* 链接列 */
.tech-footer-column {
  padding-top: 8px;
}

.tech-footer-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 24px;
  color: var(--tech-text-primary);
  letter-spacing: 1px;
}

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

.tech-footer-links li {
  margin-bottom: 14px;
}

.tech-footer-links a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  font-size: 14px;
  transition: all var(--tech-transition-fast);
  display: inline-block;
}

.tech-footer-links a:hover {
  color: var(--tech-primary);
  transform: translateX(4px);
}

/* 底部版权区域 */
.tech-footer-bottom {
  max-width: 1400px;
  margin: 60px auto 0;
  padding: 24px 40px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.tech-footer-copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

.tech-footer-icp {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  text-decoration: none;
  transition: all var(--tech-transition-fast);
}

.tech-footer-icp:hover {
  color: var(--tech-primary);
}

.tech-footer-icp img {
  width: 14px;
  height: 14px;
  opacity: 0.6;
}

/* ========================================
   滚动动画类
   ======================================== */
.tech-reveal {
  opacity: 0;
  transform: translateY(50px);
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.tech-reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.tech-reveal-left {
  opacity: 0;
  transform: translateX(-100px);
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.tech-reveal-left.active {
  opacity: 1;
  transform: translateX(0);
}

.tech-reveal-right {
  opacity: 0;
  transform: translateX(100px);
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.tech-reveal-right.active {
  opacity: 1;
  transform: translateX(0);
}

.tech-reveal-scale {
  opacity: 0;
  transform: scale(0.8);
  transition: all 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.tech-reveal-scale.active {
  opacity: 1;
  transform: scale(1);
}

/* 延迟类 */
.tech-delay-1 { transition-delay: 0.1s; }
.tech-delay-2 { transition-delay: 0.2s; }
.tech-delay-3 { transition-delay: 0.3s; }
.tech-delay-4 { transition-delay: 0.4s; }
.tech-delay-5 { transition-delay: 0.5s; }

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

@media (max-width: 768px) {
  .tech-nav-menu {
    display: none;
  }
  
  .tech-hero-title {
    font-size: 36px;
  }
  
  .tech-hero-subtitle {
    font-size: 16px;
  }
  
  .tech-section-title {
    font-size: 28px;
  }
  
  .tech-features {
    grid-template-columns: 1fr;
  }
  
  .tech-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .tech-footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  
  .tech-footer-bottom {
    flex-direction: column;
    gap: 20px;
    text-align: center;
  }
  
  .tech-timeline::before {
    left: 20px;
  }
  
  .tech-timeline-item,
  .tech-timeline-item:nth-child(even) {
    padding-left: 60px;
    padding-right: 0;
    justify-content: flex-start;
  }
  
  .tech-timeline-dot {
    left: 20px;
  }
}

/* ========================================
   特效元素
   ======================================== */
.tech-glow-text {
  text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
}

.tech-border-glow {
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.3), inset 0 0 20px rgba(0, 240, 255, 0.1);
}

.tech-gradient-border {
  position: relative;
  background: var(--tech-bg-card);
  border-radius: 16px;
}

.tech-gradient-border::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 16px;
  padding: 1px;
  background: var(--tech-gradient-primary);
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
}

/* 浮动动画 */
.tech-float {
  animation: tech-float-item 6s ease-in-out infinite;
}

@keyframes tech-float-item {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* 旋转光环 */
.tech-ring {
  position: absolute;
  border: 1px solid rgba(0, 240, 255, 0.2);
  border-radius: 50%;
  animation: tech-rotate 20s linear infinite;
}

@keyframes tech-rotate {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

/* 打字机效果 */
.tech-typewriter {
  overflow: hidden;
  border-right: 2px solid var(--tech-primary);
  white-space: nowrap;
  animation: tech-typing 3s steps(40, end), tech-blink-caret 0.75s step-end infinite;
}

@keyframes tech-typing {
  from { width: 0; }
  to { width: 100%; }
}

@keyframes tech-blink-caret {
  from, to { border-color: transparent; }
  50% { border-color: var(--tech-primary); }
}

/* 数字计数动画 */
.tech-counter {
  font-variant-numeric: tabular-nums;
}


/* ========================================
   返回顶部按钮
   ======================================== */
.tech-back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: rgba(0, 240, 255, 0.1);
  border: 1px solid rgba(0, 240, 255, 0.3);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech-primary);
  font-size: 20px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--tech-transition-fast);
  z-index: 9999;
  backdrop-filter: blur(10px);
}

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

.tech-back-to-top:hover {
  background: rgba(0, 240, 255, 0.2);
  border-color: var(--tech-primary);
  box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
  transform: translateY(-5px);
}

/* 底部响应式适配 */
@media (max-width: 1200px) {
  .tech-footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 50px;
  }
  
  .tech-footer-brand {
    max-width: 100%;
    grid-column: 1 / -1;
  }
}

@media (max-width: 768px) {
  .tech-footer {
    padding: 60px 0 20px;
  }
  
  .tech-footer-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    padding: 0 20px;
  }
  
  .tech-footer-brand {
    grid-column: 1;
  }
  
  .tech-footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
    padding: 20px 20px 0;
  }
  
  .tech-back-to-top {
    width: 44px;
    height: 44px;
    bottom: 20px;
    right: 20px;
    font-size: 18px;
  }
}