/* CSS 变量 - 设计系统 */
:root {
  /* 主色系 - 科技蓝 */
  --primary-50: #e6f1ff;
  --primary-100: #b3d4ff;
  --primary-200: #80b8ff;
  --primary-300: #4d9bff;
  --primary-400: #1a7fff;
  --primary-500: #0066cc;
  --primary-600: #0052a3;
  --primary-700: #003d7a;
  --primary-800: #002952;
  --primary-900: #001429;
  
  /* 辅助色 */
  --accent-cyan: #00d4ff;
  --accent-purple: #7b2cbf;
  --accent-green: #00c853;
  --accent-orange: #ff9100;
  
  /* 中性色 */
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  
  /* 间距 */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-2xl: 3rem;
  --spacing-3xl: 4rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 40px rgba(0, 102, 204, 0.3);
  
  /* 过渡 */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 350ms ease;
  
  /* 字体 */
  --font-sans: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --font-mono: 'SF Mono', 'Fira Code', monospace;
  
  /* 容器宽度 */
  --container-sm: 640px;
  --container-md: 768px;
  --container-lg: 1024px;
  --container-xl: 1280px;
  --container-2xl: 1440px;
}

/* 重置与基础样式 */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-sans);
  line-height: 1.6;
  color: var(--gray-800);
  background-color: var(--gray-50);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* 容器 */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}



/* ========================================
   头部导航
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-200);
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: var(--shadow-md);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

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

.logo img {
  height: 40px;
  width: auto;
}

.logo-text {
  font-size: 1.5rem;
  font-weight: 700;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}


.sup {
  position: relative;
  top: -11.8em;
  font-size: 0.6em;
}


/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.nav-item {
  position: relative;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-sm) 0;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gray-700);
  transition: color var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
  color: var(--primary-500);
}

.nav-link .arrow {
  width: 12px;
  height: 12px;
  transition: transform var(--transition-fast);
}

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

/* 下拉菜单 */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%) translateY(10px);
  min-width: 220px;
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  padding: var(--spacing-sm) 0;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.nav-item:hover .dropdown-menu {
  width: 240px;
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 0.875rem;
  color: var(--gray-600);
  transition: all var(--transition-fast);
}

.dropdown-item:hover {
  background: var(--primary-50);
  color: var(--primary-600);
  padding-left: var(--spacing-xl);
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  cursor: pointer;
}

.mobile-menu-btn span {
  width: 24px;
  height: 2px;
  background: var(--gray-700);
  border-radius: 2px;
  transition: all var(--transition-fast);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 移动端导航 */
@media (max-width: 1024px) {
  .mobile-menu-btn {
    display: flex;
  }
  
  .main-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: #ffffff;
    padding: var(--spacing-md);
    transform: translateX(100%);
    transition: transform var(--transition-base);
    box-shadow: -5px 0 20px rgba(0, 0, 0, 0.1);
  }
  
  .main-nav.active {
    transform: translateX(0);
  }
  
  .nav-item {
    background: #ffffff;
    margin-bottom: var(--spacing-xs);
    border-radius: var(--radius-lg);
    position: relative;
    z-index: 1;
   
  }
  
  .nav-link {
    padding: var(--spacing-md) var(--spacing-lg);
    justify-content: space-between;
    background: var(--primary-50);
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all 0.2s ease;
  }
  
  .nav-link.active {
    background: var(--primary-500);
    color: white;
  }
  
  .nav-item.has-dropdown .nav-link {
    cursor: pointer;
  }
  
  /* 浮动下拉菜单 - 移动端 */
  .dropdown-menu {
    position: static !important;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    background: #ffffff;
    margin-top: 0;
    margin-left: 0;
    margin-right: 0;
    width: 100%;
    box-shadow: none !important;
    border: none;
    overflow: hidden !important;
    z-index: 10;
    text-align: left;
    box-sizing: border-box;
    padding-left: var(--spacing-lg);
    max-height: 0;
    transition: max-height 0.3s ease;
  }
  
  .nav-item.dropdown-open .dropdown-menu,
  .nav-item:hover .dropdown-menu {
    display: block;
    max-height: 600px;
    width:800px;
    animation: none;
  }
  
  .nav-item.dropdown-open {
    background: transparent;
    padding-bottom: 0;
	
  }
  
  .nav-item.dropdown-open .nav-link {
    background: var(--primary-600);
    color: white;
    border-radius: var(--radius-lg);
  }
  
  .nav-item.dropdown-open .nav-link .arrow {
    filter: brightness(0) invert(1);
    transform: rotate(180deg);
  }
  
  @keyframes slideDown {
    from {
      opacity: 0;
      transform: translateY(-10px);
    }
    to {
      opacity: 1;
      transform: translateY(0);
    }
  }
  
  .dropdown-item {
    display: block;
    width:450px;
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    color: var(--gray-700);
    font-size: 0.9375rem;
    border: none;
    transition: all 0.3s ease;
    text-align: left;
    box-sizing: border-box;
    border-radius: 0;
  }
  
  .dropdown-item:last-child {
    border-bottom: none;
  }
  
  .dropdown-item:hover,

  .dropdown-item:active {
    background: var(--primary-50);
    color: var(--primary-700);
    padding-left: calc(var(--spacing-lg) + 0.5rem);
  }
  
  .dropdown-item.active {
    background: var(--primary-100);
    color: var(--primary-600);
    font-weight: 500;
  }
}


/* ========================================
   Hero 区域
   ======================================== */
.hero {
  position: relative;
  min-height: 50vh; /*top bar height */
  display: flex;
  align-items: center;
  padding-top: 64px;
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-700) 50%, var(--gray-900) 100%);
}

.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  overflow: hidden;
}

.hero-tech-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    linear-gradient(135deg, rgba(0, 20, 41, 0.15) 0%, rgba(0, 61, 122, 0.85) 50%, rgba(0, 20, 41, 0.15) 100%),
    url('/images/hero-bg.jpg') center/cover no-repeat;
  opacity: 0.5;
}

.hero-bg::before {
  content: '';
  position: absolute;
  width: 150%;
  height: 150%;
  top: -25%;
  left: -25%;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 102, 204, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 20%, rgba(0, 212, 255, 0.2) 0%, transparent 40%),
    radial-gradient(circle at 60% 80%, rgba(123, 44, 191, 0.15) 0%, transparent 40%);
  animation: heroGlow 20s ease-in-out infinite;
}

@keyframes heroGlow {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(30px, -30px) rotate(5deg); }
  66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

.hero-particles {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(2px 2px at 20% 30%, rgba(255, 255, 255, 0.3) 0%, transparent 100%),
    radial-gradient(2px 2px at 40% 70%, rgba(255, 255, 255, 0.2) 0%, transparent 100%),
    radial-gradient(1px 1px at 60% 20%, rgba(255, 255, 255, 0.4) 0%, transparent 100%),
    radial-gradient(2px 2px at 80% 60%, rgba(255, 255, 255, 0.25) 0%, transparent 100%);
  animation: particleFloat 30s linear infinite;
}

@keyframes particleFloat {
  0% { transform: translateY(0); }
  100% { transform: translateY(-100px); }
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding: var(--spacing-3xl) 0;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 50px;
  margin-bottom: var(--spacing-xl);
  backdrop-filter: blur(10px);
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--accent-cyan);
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.2); }
}

.hero-badge-text {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.9);
  font-weight: 500;
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 700;
  color: white;
  line-height: 1.2;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.hero-title-highlight {
  background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--primary-300) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255, 255, 255, 0.8);
  max-width: 800px;
  margin: 0 auto var(--spacing-2xl);
  line-height: 1.8;
}

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

/* 按钮样式 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  color: white;
  box-shadow: 0 4px 20px rgba(0, 102, 204, 0.4);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(0, 102, 204, 0.5);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--primary-500);
  border: 2px solid var(--primary-500);
}

.btn-outline:hover {
  background: var(--primary-500);
  color: white;
}

/* Hero 滚动提示 */
.hero-scroll {
  position: absolute;
  bottom: var(--spacing-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  color: rgba(255, 255, 255, 0.6);
  font-size: 0.75rem;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(10px); }
}

.hero-scroll-icon {
  width: 24px;
  height: 40px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  position: relative;
}

.hero-scroll-icon::after {
  content: '';
  position: absolute;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 8px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 2px;
  animation: scrollDot 2s ease-in-out infinite;
}

@keyframes scrollDot {
  0%, 100% { opacity: 1; top: 8px; }
  50% { opacity: 0.3; top: 16px; }
}

/* ========================================
   通用区块样式
   ======================================== */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-alt {
  background: white;
}

.section-dark {
  background: var(--gray-900);
  color: white;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--primary-50);
  color: var(--primary-600);
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-radius: 50px;
  margin-bottom: var(--spacing-md);
}

.section-title {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.section-dark .section-title {
  color: white;
}

.section-description {
  font-size: 1.125rem;
  color: var(--gray-600);
  max-width: 600px;
  margin: 0 auto;
  line-height: 1.7;
}

.section-dark .section-description {
  color: var(--gray-400);
}













/* ========================================
   卡片网格
   ======================================== */
.card-grid {
  display: grid;
  gap: var(--spacing-lg);
}

.card-grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

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

@media (max-width: 768px) {
  .card-grid-2,
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }
}

/* 卡片样式 */
.card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--gray-100);
}

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

.card-image {
  position: relative;
  height: 200px;  
  background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-50) 100%);
  overflow: hidden;
}

.card-image img {
  transition: transform var(--transition-slow);
}

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

.card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-image-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.card-image-icon svg {
  width: 40px;
  height: 40px;
  color: var(--primary-500);
}

.card-body {
  padding: var(--spacing-lg);
}

.card-tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--primary-50);
  color: var(--primary-600);
  font-size: 0.75rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  margin-bottom: var(--spacing-sm);
}

.card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.card-description {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  margin-top: var(--spacing-md);
  color: var(--primary-500);
  font-weight: 500;
  font-size: 0.9375rem;
}

.card-link:hover {
  color: var(--primary-600);
}

.card-link svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.card-link:hover svg {
  transform: translateX(4px);
}

/* ========================================
   特色卡片
   ======================================== */
.feature-card {
  padding: var(--spacing-xl);
  background: white;
  border-radius: var(--radius-xl);
  border: 1px solid var(--gray-100);
  transition: all var(--transition-base);
}

.feature-card:hover {
  border-color: var(--primary-200);
  box-shadow: var(--shadow-lg);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--primary-500) 0%, var(--primary-600) 100%);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-lg);
}

.feature-icon svg {
  width: 28px;
  height: 28px;
  color: white;
}

.feature-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.feature-description {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
}

/* ========================================
   数据统计
   ======================================== */
.stats-section {
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
  padding: var(--spacing-3xl) 0;
}

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

@media (max-width: 768px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.stat-item {
  text-align: center;
  color: white;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  margin-bottom: var(--spacing-xs);
  background: linear-gradient(135deg, white 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.9375rem;
  color: rgba(255, 255, 255, 0.8);
}

/* ========================================
   产品展示
   ======================================== */
.products-showcase {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 768px) {
  .products-showcase {
    grid-template-columns: 1fr;
  }
}

.product-card {
  position: relative;
  height: 210px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  cursor: pointer;
}

.product-card-bg {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
  transition: transform var(--transition-slow);
}

.product-card:hover .product-card-bg {
  transform: scale(1.1);
}

.product-card-content {
  position: relative;
  z-index: 1;
  height: 100%;
  padding: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  color: white;
  margin-top:20px;
  
  
}

.product-card-icon {
  position: absolute;
  top: var(--spacing-xl);
  right: var(--spacing-xl);
  width: 60px;
  height: 60px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(10px);
}

.product-card-icon svg {
  width: 30px;
  height: 30px;
  color: white;
}

.product-card-title {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  background:#004182;
  text-align:center;
  border-radius: var(--radius-xl);
  padding:10px;
}

.product-card-description {
  font-size: 0.8375rem;
  color: rgba(255, 255, 255, 0.8);
  background:#373737;
  opacity: 0;
  padding:3px;
   text-align:center;
  transform: translateY(10px);
  transition: all var(--transition-base);
   margin-bottom:20px;
}

.product-card:hover .product-card-description {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================
   新闻卡片
   ======================================== */
.news-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--gray-100);
}

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

.news-card-image {
  height: 200px;
  background: linear-gradient(135deg, var(--primary-100) 0%, var(--gray-100) 100%);
  overflow: hidden;
}

.news-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-card-body {
  padding: var(--spacing-lg);
}

.news-card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  font-size: 0.8125rem;
  color: var(--gray-500);
}

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

.news-card-category {
  padding: var(--spacing-xs) var(--spacing-sm);
  background: var(--primary-50);
  color: var(--primary-600);
  border-radius: var(--radius-sm);
  font-weight: 500;
}

.news-card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
  line-height: 1.4;
}

.news-card-title:hover {
  color: var(--primary-500);
}

.news-card-excerpt {
  font-size: 0.875rem;
  color: var(--gray-600);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ========================================
   表单样式
   ======================================== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--gray-700);
  margin-bottom: var(--spacing-sm);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-md);
  font-size: 1rem;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-lg);
  background: white;
  transition: all var(--transition-fast);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--primary-500);
  box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-error {
  font-size: 0.8125rem;
  color: #dc2626;
  margin-top: var(--spacing-xs);
}

/* ========================================
   页面横幅
   ======================================== */
.page-banner {
  position: relative;
  padding: calc(64px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-900) 100%);
  overflow: hidden;
}

.page-banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(0, 212, 255, 0.1) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(123, 44, 191, 0.1) 0%, transparent 40%);
}

.page-banner-content {
  position: relative;
  z-index: 1;
  text-align: center;
}

.page-banner-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-md);
}

.page-banner-description {
  font-size: 1.125rem;
  color: rgba(255, 255, 255, 0.8);
  max-width: 600px;
  margin: 0 auto;
}

/* 面包屑导航 */
.breadcrumb {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
  font-size: 0.875rem;
}

.breadcrumb a {
  color: rgba(255, 255, 255, 0.7);
}

.breadcrumb a:hover {
  color: white;
}

.breadcrumb span {
  color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-current {
  color: white;
  font-weight: 500;
}

/* ========================================
   产品详情页
   ======================================== */
.product-detail {
  padding: var(--spacing-3xl) 0;
}

.product-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-3xl);
  align-items: center;
  margin-bottom: var(--spacing-3xl);
}

@media (max-width: 768px) {
  .product-intro {
    grid-template-columns: 1fr;
  }
}

.product-image {
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--gray-100) 100%);
  padding: var(--spacing-xl);
}

.product-image img {
  width: 100%;
  border-radius: var(--radius-lg);
}

.product-info-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-bottom: var(--spacing-lg);
}

.product-info-desc {
  font-size: 1.125rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: var(--spacing-xl);
}

.product-features {
  display: grid;
  gap: var(--spacing-md);
}

.product-feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
}

.product-feature-icon {
  width: 24px;
  height: 24px;
  background: var(--primary-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.product-feature-icon svg {
  width: 14px;
  height: 14px;
  color: var(--primary-600);
}

.product-feature-text {
  font-size: 1rem;
  color: var(--gray-700);
}

/* 技术参数表格 */
.tech-specs {
  background: var(--gray-50);
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
}

.tech-specs-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-lg);
}

.tech-specs-table {
  width: 100%;
}

.tech-specs-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--gray-200);
}

.tech-specs-row:last-child {
  border-bottom: none;
}

.tech-specs-label {
  font-weight: 500;
  color: var(--gray-600);
}

.tech-specs-value {
  color: var(--gray-800);
}

/* ========================================
   案例展示
   ======================================== */

/* 案例筛选 */
.case-filters {
  margin-bottom: var(--spacing-2xl);
}

.filter-group {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.filter-label {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--gray-700);
}

.filter-buttons {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.filter-btn {
  padding: var(--spacing-xs) var(--spacing-lg);
  border: 2px solid var(--gray-200);
  background: white;
  color: var(--gray-600);
  font-size: 0.875rem;
  font-weight: 500;
  border-radius: 50px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover {
  border-color: var(--primary-400);
  color: var(--primary-500);
  background: var(--primary-50);
}

.filter-btn.active {
  border-color: var(--primary-500);
  background: var(--primary-500);
  color: white;
  box-shadow: 0 2px 8px rgba(0, 102, 204, 0.3);
}

.case-card {
  background: white;
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
}

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

.case-card-image {
  height: 240px;
  background: linear-gradient(135deg, var(--primary-100) 0%, var(--gray-100) 100%);
  position: relative;
  overflow: hidden;
}

.case-card-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-card-tag {
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-md);
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--primary-500);
  color: white;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: 50px;
}

.case-card-body {
  padding: var(--spacing-xl);
}

.case-card-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-sm);
}

.case-card-excerpt {
  font-size: 0.9375rem;
  color: var(--gray-600);
  line-height: 1.6;
  margin-bottom: var(--spacing-md);
}

.case-card-meta {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--gray-100);
  font-size: 0.8125rem;
  color: var(--gray-500);
}
/* ========================================
   联系我们
   ======================================== */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: var(--spacing-3xl);
}

@media (max-width: 768px) {
  .contact-section {
    grid-template-columns: 1fr;
  }
}

.contact-info {
  padding: var(--spacing-xl);
  background: linear-gradient(135deg, var(--primary-600) 0%, var(--primary-800) 100%);
  border-radius: var(--radius-xl);
  color: white;
}

.contact-info-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-info-icon svg {
  width: 20px;
  height: 20px;
  color: white;
}

.contact-info-label {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-xs);
}

.contact-info-value {
  font-size: 1rem;
  font-weight: 500;
}

.contact-form-card {
  background: white;
  border-radius: var(--radius-xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
}

.contact-form-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-bottom: var(--spacing-lg);
}

/* ========================================
   页脚
   ======================================== */
.footer {
  background: var(--gray-900);
  color: white;
  padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr 1.5fr;
  gap: var(--spacing-2xl);
  margin-bottom: var(--spacing-3xl);
}

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

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

.footer-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

.footer-brand img {
  height: 32px;
}

.footer-brand-text {
  font-size: 1.25rem;
  font-weight: 700;
}

.footer-description {
  font-size: 0.9375rem;
  color: var(--gray-400);
  line-height: 1.7;
  margin-bottom: var(--spacing-lg);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-social-link {
  width: 40px;
  height: 40px;
  background: var(--gray-800);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gray-400);
  transition: all var(--transition-fast);
}

.footer-social-link:hover {
  background: var(--primary-500);
  color: white;
}

.footer-social-link svg {
  width: 20px;
  height: 20px;
}

.footer-title {
  min-width:200px;
  font-size: 1rem;
  font-weight: 600;
  color: white;
  margin-bottom: var(--spacing-lg);
}

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

.footer-link {
  
  color: var(--gray-400);
  transition: color var(--transition-fast);
}

.footer-link:hover {
  color: white;
}

.footer-newsletter-text {
  font-size: 0.875rem;
  color: var(--gray-400);
  margin-bottom: var(--spacing-md);
}

.footer-newsletter-form {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-newsletter-input {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--gray-800);
  border: 1px solid var(--gray-700);
  border-radius: var(--radius-md);
  color: white;
  font-size: 0.875rem;
}

.footer-newsletter-input::placeholder {
  color: var(--gray-500);
}

.footer-newsletter-btn {
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--primary-500);
  color: white;
  border-radius: var(--radius-md);
  font-weight: 500;
  font-size: 0.875rem;
  transition: background var(--transition-fast);
}

.footer-newsletter-btn:hover {
  background: var(--primary-600);
}

.footer-bottom {
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--gray-800);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.footer-copyright {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.footer-legal {
  display: flex;
  gap: var(--spacing-lg);
}

.footer-legal-link {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.footer-legal-link:hover {
  color: white;
}

/* ========================================
   动画效果
   ======================================== */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: all 0.6s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: all 0.6s ease-out;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: all 0.6s ease-out;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

.scale-in {
  opacity: 0;
  transform: scale(0.9);
  transition: all 0.6s ease-out;
}

.scale-in.visible {
  opacity: 1;
  transform: scale(1);
}

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

/* ========================================
   工具类
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }
.mt-4 { margin-top: var(--spacing-xl); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }
.mb-4 { margin-bottom: var(--spacing-xl); }

.hidden { display: none; }

@media (max-width: 768px) {
  .mobile-hidden { display: none; }
  .mobile-show { display: block; }
}

@media (min-width: 769px) {
  .desktop-hidden { display: none; }
  .desktop-show { display: block; }
}

/* ========================================
   详情页样式
   ======================================== */
.detail-content {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xl) 0;
}

/* 详情头部 */
.detail-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--gray-200);
}

.detail-category {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  background: var(--primary-100);
  color: var(--primary-600);
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 500;
  margin-bottom: var(--spacing-md);
}

.detail-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--gray-900);
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
}

.detail-meta {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-lg);
  color: var(--gray-500);
  font-size: 0.9375rem;
}

.detail-date,
.detail-views {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.detail-date svg,
.detail-views svg {
  color: var(--gray-400);
}

/* 详情封面图 */
.detail-cover {
  margin-bottom: var(--spacing-xl);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.detail-cover img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform var(--transition-base);
}

.detail-cover:hover img {
  transform: scale(1.02);
}

/* 详情正文 */
.detail-body {
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--gray-700);
  margin-bottom: var(--spacing-xl);
}

.detail-summary {
  font-size: 1.1875rem;
  font-weight: 600;
  color: var(--gray-800);
  background: var(--gray-50);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-lg);
  border-left: 4px solid var(--primary-500);
  margin-bottom: var(--spacing-xl);
}

.detail-body h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--gray-900);
  margin-top: var(--spacing-2xl);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--primary-100);
}

.detail-body h3 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--gray-900);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
}

.detail-body p {
  margin-bottom: var(--spacing-md);
}

.detail-body ul,
.detail-body ol {
  margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-xl);
  color: var(--gray-700);
}

.detail-body li {
  margin-bottom: var(--spacing-sm);
  line-height: 1.8;
}

.detail-body ul li {
  list-style-type: disc;
}

.detail-body ol li {
  list-style-type: decimal;
}

.detail-body strong {
  color: var(--primary-600);
  font-weight: 600;
}

/* 案例引用 */
.case-quote {
  background: var(--gray-50);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl) var(--spacing-2xl);
  margin: var(--spacing-xl) 0;
  position: relative;
}

.case-quote::before {
  content: '"';
  font-size: 4rem;
  color: var(--primary-200);
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-lg);
  font-family: Georgia, serif;
  line-height: 1;
}

.case-quote p {
  font-style: italic;
  color: var(--gray-700);
  margin-bottom: var(--spacing-md);
  padding-left: var(--spacing-xl);
}

.quote-author {
  text-align: right;
  font-weight: 600;
  color: var(--primary-600);
  font-style: normal !important;
}

/* 项目参数 */
.case-specs {
  background: var(--primary-50);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  margin: var(--spacing-xl) 0;
}

.case-specs h3 {
  font-size: 1.375rem;
  font-weight: 600;
  color: var(--primary-700);
  margin-bottom: var(--spacing-lg);
}

.specs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: var(--spacing-md);
}

.spec-item {
  background: white;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.spec-label {
  font-size: 0.875rem;
  color: var(--gray-500);
}

.spec-value {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--primary-700);
}

/* 分享按钮 */
.detail-share {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-lg) 0;
  border-top: 1px solid var(--gray-200);
  border-bottom: 1px solid var(--gray-200);
  margin-bottom: var(--spacing-xl);
}

.detail-share span {
  color: var(--gray-500);
  font-size: 0.9375rem;
}

.share-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--gray-300);
  border-radius: var(--radius-md);
  background: white;
  color: var(--gray-600);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.share-btn:hover {
  border-color: var(--primary-500);
  background: var(--primary-50);
  color: var(--primary-600);
}

/* 导航按钮 */
.detail-navigation {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-lg);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.nav-btn.prev {
  background: var(--primary-50);
  color: var(--primary-700);
}

.nav-btn.prev:hover {
  background: var(--primary-100);
  color: var(--primary-600);
}

.nav-btn.back {
  background: var(--gray-100);
  color: var(--gray-700);
}

.nav-btn.back:hover {
  background: var(--gray-200);
  color: var(--gray-800);
}

/* 按钮文本样式 */
.btn-text {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  color: var(--primary-600);
  font-weight: 600;
  font-size: 0.9375rem;
  text-decoration: none;
  transition: all var(--transition-fast);
  margin-top: var(--spacing-md);
}

.btn-text:hover {
  color: var(--primary-700);
  gap: var(--spacing-sm);
}

.btn-text::after {
  content: '';
  width: 0;
  height: 0;
  border-left: 4px solid currentColor;
  border-top: 3px solid transparent;
  border-bottom: 3px solid transparent;
  transition: all var(--transition-fast);
}

.btn-text:hover::after {
  transform: translateX(4px);
}

/* 响应式设计 */
@media (max-width: 768px) {
  .detail-title {
    font-size: 1.5rem;
  }
  
  .detail-content {
    padding: var(--spacing-lg) 0;
  }
  
  .detail-navigation {
    flex-direction: column;
  }
  
  .nav-btn {
    width: 100%;
    justify-content: center;
  }
  
  .specs-grid {
    grid-template-columns: 1fr;
  }
}

/* 产品卡片图片样式 */
.product-card-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.product-card:hover .product-card-image {
  transform: scale(1.1);
  transition: transform var(--transition-slow);
}