/* 现代化设计变量 */
:root {
  /* 颜色系统 */
  --bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  --bg-soft: #ffffff;
  --card: rgba(255, 255, 255, 0.9);
  --card-hover: rgba(255, 255, 255, 0.95);
  --card-border: rgba(255, 255, 255, 0.2);
  --line: rgba(148, 163, 184, 0.2);
  --text: #1e293b;
  --text-soft: #475569;
  --muted: #64748b;
  --light-muted: #94a3b8;
  
  /* 中医主题色 */
  --primary: #dc2626;
  --primary-light: #ef4444;
  --primary-dark: #b91c1c;
  --primary-50: #fef2f2;
  --primary-100: #fee2e2;
  --primary-500: #ef4444;
  --primary-600: #dc2626;
  --primary-700: #b91c1c;
  --primary-900: #7f1d1d;
  
  /* 渐变 */
  --gradient-primary: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
  --gradient-bg: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  --gradient-card: linear-gradient(145deg, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.7) 100%);
  --gradient-hero: linear-gradient(135deg, #dc2626 0%, #b91c1c 50%, #7f1d1d 100%);
  
  /* 阴影系统 */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1), 0 1px 2px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07), 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1), 0 4px 6px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.1), 0 10px 10px rgba(0, 0, 0, 0.04);
  --shadow-2xl: 0 25px 50px rgba(0, 0, 0, 0.15);
  --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-glow: 0 0 20px rgba(220, 38, 38, 0.3);
  
  /* 圆角系统 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;
  
  /* 间距系统 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;
  
  /* 毛玻璃效果 */
  --glass-blur: backdrop-filter: blur(20px) saturate(180%);
  --glass-border: 1px solid rgba(255, 255, 255, 0.125);
  
  /* 动画 */
  --transition-fast: 0.15s ease-out;
  --transition-base: 0.25s ease-out;
  --transition-slow: 0.5s ease-out;
  --bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
}

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

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

html,
body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--gradient-bg);
  background-attachment: fixed;
  line-height: 1.7;
  font-size: 16px;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
  border-radius: var(--radius-md);
}

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

a:hover {
  transform: translateY(-1px);
}

.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0 0 var(--spacing-sm);
  line-height: 1.2;
  font-weight: 700;
  letter-spacing: -0.025em;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
  margin: 0 0 var(--spacing-sm);
  color: var(--text-soft);
}

/* 选中效果 */
::selection {
  background: var(--primary-100);
  color: var(--primary-900);
}

::-moz-selection {
  background: var(--primary-100);
  color: var(--primary-900);
}

/* 现代化头部导航 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.85);
  var(--glass-blur);
  border-bottom: var(--glass-border);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
}

.site-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(90deg, 
    rgba(255,255,255,0.9) 0%, 
    rgba(255,255,255,0.95) 50%, 
    rgba(255,255,255,0.9) 100%);
  z-index: -1;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  position: relative;
  min-height: 80px;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  transition: transform var(--transition-fast);
  height: 100%;
}

.brand:hover {
  transform: scale(1.02);
}

.brand-logo {
  height: 52px;
  width: auto;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  display: block;
  object-fit: contain;
  flex-shrink: 0;
}

.brand-logo:hover {
  transform: scale(1.05);
}

.brand-name {
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text);
  font-size: 1.25rem;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  line-height: 1.2;
  display: flex;
  align-items: center;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  height: 100%;
  justify-content: flex-end;
}

.site-nav a {
  position: relative;
  padding: 12px 20px;
  border-radius: var(--radius-full);
  color: var(--text-soft);
  font-size: 15px;
  font-weight: 500;
  transition: all var(--transition-base);
  overflow: hidden;
}

.site-nav a::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
  opacity: 0;
  transition: opacity var(--transition-fast);
  z-index: -1;
}

.site-nav a:hover {
  color: var(--primary-600);
  transform: translateY(-2px);
}

.site-nav a:hover::before {
  opacity: 1;
}

.site-nav .nav-cta {
  color: white;
  background: var(--gradient-primary);
  box-shadow: var(--shadow-glow);
  border: none;
  position: relative;
  overflow: hidden;
}

.site-nav .nav-cta::before {
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, rgba(255,255,255,0.1) 100%);
}

.site-nav .nav-cta:hover {
  color: white;
  transform: translateY(-3px);
  box-shadow: 0 0 30px rgba(220, 38, 38, 0.4), var(--shadow-xl);
}

.site-nav .nav-icon {
  width: 44px;
  height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border-radius: var(--radius-full);
}

/* 现代化版块布局 */
.section-hero {
  padding: var(--spacing-2xl) 0 var(--spacing-xl);
  position: relative;
  overflow: hidden;
}

.section-intro,
.section-platforms,
.section-products,
.section-videos,
.section-contact {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-intro::before,
.section-platforms::before,
.section-products::before,
.section-videos::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  opacity: 0.6;
}

.section-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.03em;
  text-align: center;
  background: linear-gradient(135deg, var(--text) 0%, var(--text-soft) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  position: relative;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -12px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
}

.section-subtitle {
  color: var(--muted);
  margin-bottom: var(--spacing-xl);
  text-align: center;
  font-size: 1.125rem;
  line-height: 1.8;
  /* max-width: 600px; */
  /* margin-left: auto; */
  margin-right: auto;
}

/* 现代化网格系统 */
.grid {
  display: grid;
  gap: var(--spacing-lg);
}

/* 现代化卡片组件 */
.card {
  background: var(--gradient-card);
  border: var(--glass-border);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transition: all var(--transition-base);
  position: relative;
  backdrop-filter: blur(20px);
}

.card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255,255,255,0.5) 50%, 
    transparent 100%);
  z-index: 1;
}

.card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl);
  background: var(--card-hover);
}

.card-body {
  padding: var(--spacing-lg);
  position: relative;
  z-index: 2;
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-sm);
  font-weight: 700;
  color: var(--text);
  line-height: 1.3;
}

/* 现代化按钮组件 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  border: none;
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255,255,255,0.3) 50%, 
    transparent 100%);
  transition: left 0.6s ease;
  z-index: 1;
}

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

.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-xl);
}

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

.btn-primary:hover {
  box-shadow: 0 0 40px rgba(220, 38, 38, 0.5), var(--shadow-xl);
  transform: translateY(-4px) scale(1.05);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.1);
  color: var(--primary-600);
  border: 2px solid var(--primary-600);
  backdrop-filter: blur(10px);
}

.btn-outline:hover {
  background: var(--primary-600);
  color: white;
  border-color: var(--primary-600);
}

.actions {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-top: var(--spacing-md);
}

/* 现代化媒体容器 */
.media {
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
  border-radius: var(--radius-xl);
}

.media > img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.media:hover > img {
  transform: scale(1.1);
}

.media-16x9 {
  aspect-ratio: 16 / 9;
}

/* 现代化轮播组件 */
.carousel {
  position: relative;
  border-radius: var(--radius-2xl);
  overflow: hidden;
  box-shadow: var(--shadow-2xl);
  background: var(--gradient-card);
  backdrop-filter: blur(20px);
  border: var(--glass-border);
}

.carousel::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, 
    rgba(220,38,38,0.1) 0%, 
    rgba(185,28,28,0.05) 50%, 
    rgba(127,29,29,0.1) 100%);
  z-index: 1;
  pointer-events: none;
}

.slides {
  display: flex;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  position: relative;
  z-index: 2;
}

.slide {
  min-width: 100%;
  position: relative;
}

.slide-caption {
  position: absolute;
  left: var(--spacing-xl);
  bottom: var(--spacing-xl);
  color: white;
  text-shadow: 0 4px 20px rgba(0,0,0,0.7);
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(20px);
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255,255,255,0.2);
  max-width: 500px;
}

.slide-caption h2 {
  font-size: 1.875rem;
  font-weight: 800;
  margin-bottom: var(--spacing-sm);
  color: white;
}

.slide-caption p {
  font-size: 1.125rem;
  color: rgba(255,255,255,0.9);
  line-height: 1.6;
}

.carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(20px);
  color: var(--text);
  border: var(--glass-border);
  display: grid;
  place-items: center;
  cursor: pointer;
  font-size: 1.25rem;
  font-weight: 700;
  transition: all var(--transition-base);
  z-index: 10;
  box-shadow: var(--shadow-lg);
}

.carousel-btn:hover {
  background: white;
  transform: translateY(-50%) scale(1.1);
  color: var(--primary-600);
  box-shadow: var(--shadow-xl);
}

.carousel-btn.prev {
  left: var(--spacing-lg);
}

.carousel-btn.next {
  right: var(--spacing-lg);
}

.carousel-dots {
  position: absolute;
  left: 0;
  right: 0;
  bottom: var(--spacing-lg);
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  z-index: 10;
}

.carousel-dots button {
  width: 12px;
  height: 12px;
  padding: 0;
  border-radius: var(--radius-full);
  border: 2px solid rgba(255,255,255,0.5);
  background: rgba(255,255,255,0.3);
  cursor: pointer;
  transition: all var(--transition-base);
  backdrop-filter: blur(10px);
}

.carousel-dots button:hover {
  background: rgba(255,255,255,0.6);
  border-color: rgba(255,255,255,0.8);
  transform: scale(1.2);
}

.carousel-dots button.active {
  background: var(--primary-600);
  border-color: var(--primary-600);
  width: 32px;
  border-radius: 12px;
  box-shadow: 0 0 20px rgba(220,38,38,0.5);
}

/* 现代化介绍卡片 */
.intro-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.intro-card {
  background: var(--gradient-card);
  border: var(--glass-border);
  border-radius: var(--radius-2xl);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(20px);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.intro-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-primary);
  z-index: 1;
}

.intro-card::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100px;
  height: 100px;
  background: radial-gradient(circle, rgba(220,38,38,0.1) 0%, transparent 70%);
  border-radius: 50%;
  transition: all var(--transition-slow);
}

.intro-card:hover {
  transform: translateY(-12px) rotateX(5deg);
  box-shadow: var(--shadow-2xl);
}

.intro-card:hover::after {
  top: -30%;
  right: -30%;
  background: radial-gradient(circle, rgba(220,38,38,0.2) 0%, transparent 70%);
}

.intro-card h3 {
  font-size: 1.375rem;
  margin-bottom: var(--spacing-sm);
  color: var(--text);
  font-weight: 700;
  position: relative;
  z-index: 2;
}

.intro-card p {
  color: var(--text-soft);
  line-height: 1.7;
  font-size: 1rem;
  position: relative;
  z-index: 2;
}

/* 现代化平台链接卡片 */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.platform-card {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  align-items: center;
  gap: var(--spacing-lg);
  background: var(--gradient-card);
  border: var(--glass-border);
  padding: var(--spacing-xl);
  border-radius: var(--radius-2xl);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.platform-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(255,255,255,0.1) 0%, 
    rgba(255,255,255,0.05) 50%, 
    rgba(255,255,255,0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 1;
}

.platform-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl);
}

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

.platform-icon {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-xl);
  display: grid;
  place-items: center;
  font-weight: 800;
  font-size: 2rem;
  color: white;
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  position: relative;
  z-index: 2;
}

.platform-card:hover .platform-icon {
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-xl);
}

.platform-card.douyin .platform-icon {
  background: linear-gradient(135deg, #000000 0%, #434343 100%);
}

.platform-card.xhs .platform-icon {
  background: linear-gradient(135deg, #ff2442 0%, #ff6b6b 100%);
}

.platform-info {
  position: relative;
  z-index: 2;
}

.platform-info h3 {
  margin-bottom: var(--spacing-xs);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
}

.platform-info p {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.platform-cta {
  color: var(--primary-600);
  font-weight: 700;
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  position: relative;
  z-index: 2;
  transition: all var(--transition-fast);
}

.platform-card:hover .platform-cta {
  color: var(--primary-700);
  transform: translateX(4px);
}

/* 现代化产品卡片 */
.products-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.product-card {
  background: var(--gradient-card);
  border: var(--glass-border);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform var(--transition-base);
  z-index: 1;
}

.product-card:hover {
  transform: translateY(-12px) rotateY(2deg);
  box-shadow: var(--shadow-2xl);
}

.product-card:hover::before {
  transform: scaleX(1);
}

.product-card .card-body {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  padding: var(--spacing-xl);
}

.product-card .card-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: var(--spacing-sm);
}

.product-card .media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-xl);
}

.product-card .media::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, 
    rgba(220,38,38,0.1) 0%, 
    transparent 50%, 
    rgba(185,28,28,0.1) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.product-card:hover .media::after {
  opacity: 1;
}

/* 现代化视频卡片 */
.videos-grid {
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
}

.video-card {
  position: relative;
  background: var(--gradient-card);
  border: var(--glass-border);
  backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg);
  transition: all var(--transition-base);
  overflow: hidden;
}

.video-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, 
    rgba(220,38,38,0.05) 0%, 
    rgba(185,28,28,0.02) 50%, 
    rgba(127,29,29,0.05) 100%);
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: 1;
}

.video-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-2xl);
}

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

.video-card .media {
  position: relative;
  overflow: hidden;
}

.video-card .media::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, 
    transparent 0%, 
    rgba(0,0,0,0.2) 100%);
  transition: all var(--transition-base);
}

.video-card:hover .media::after {
  background: linear-gradient(180deg, 
    transparent 0%, 
    rgba(0,0,0,0.4) 100%);
}

.play-badge {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 80px;
  height: 80px;
  background: rgba(0,0,0,0.7);
  backdrop-filter: blur(20px);
  color: white;
  font-size: 2rem;
  border-radius: var(--radius-full);
  display: grid;
  place-items: center;
  box-shadow: var(--shadow-xl);
  border: 3px solid rgba(255,255,255,0.3);
  transition: all var(--transition-base);
  z-index: 5;
}

.video-card:hover .play-badge {
  transform: translate(-50%, -50%) scale(1.2);
  background: rgba(220,38,38,0.9);
  box-shadow: 0 0 40px rgba(220,38,38,0.6), var(--shadow-xl);
  border-color: rgba(255,255,255,0.6);
}

.video-card .card-body {
  position: relative;
  z-index: 2;
  padding: var(--spacing-lg);
}

.video-card .card-title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--text);
  line-height: 1.4;
}

/* 现代化联系我们区域 */
.section-contact {
  background: linear-gradient(135deg, 
    rgba(248,250,252,0.9) 0%, 
    rgba(241,245,249,0.9) 50%, 
    rgba(248,250,252,0.9) 100%);
  border-top: var(--glass-border);
  backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}

.section-contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at 20% 50%, 
    rgba(220,38,38,0.05) 0%, 
    transparent 50%),
  radial-gradient(circle at 80% 50%, 
    rgba(185,28,28,0.05) 0%, 
    transparent 50%);
  z-index: 1;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: var(--spacing-2xl);
  align-items: center;
  position: relative;
  z-index: 2;
}

.contact-info {
  position: relative;
}

.contact-info .section-title {
  text-align: left;
  margin-bottom: var(--spacing-lg);
}

.contact-info .section-subtitle {
  text-align: left;
  margin-bottom: var(--spacing-xl);
  font-size: 1.125rem;
  line-height: 1.8;
  color: var(--text-soft);
}

.contact-info .actions {
  margin-top: var(--spacing-lg);
}

.contact-qr {
  text-align: center;
  position: relative;
}

.contact-qr::before {
  content: '';
  position: absolute;
  top: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 280px;
  height: 280px;
  background: radial-gradient(circle, 
    rgba(220,38,38,0.1) 0%, 
    rgba(220,38,38,0.05) 50%, 
    transparent 70%);
  border-radius: 50%;
  z-index: 1;
}

.contact-qr img {
  width: 240px;
  height: 240px;
  margin: 0 auto var(--spacing-md);
  border-radius: var(--radius-2xl);
  box-shadow: var(--shadow-2xl);
  border: 4px solid rgba(255,255,255,0.8);
  backdrop-filter: blur(10px);
  position: relative;
  z-index: 2;
  transition: all var(--transition-base);
}

.contact-qr img:hover {
  transform: scale(1.05) rotate(2deg);
  box-shadow: 0 25px 50px rgba(220,38,38,0.2), var(--shadow-2xl);
}

.qr-tip {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
  position: relative;
  z-index: 2;
}

/* 现代化页脚 */
.site-footer {
  border-top: var(--glass-border);
  background: rgba(255,255,255,0.9);
  backdrop-filter: blur(20px);
  position: relative;
}

.site-footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    var(--primary-600) 50%, 
    transparent 100%);
  opacity: 0.3;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl) 0;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 500;
}

/* 现代化响应式设计 */
@media (max-width: 1024px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .intro-grid,
  .platform-grid,
  .products-grid,
  .videos-grid {
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 80px;
    padding: 0 var(--spacing-md);
    justify-content: space-between;
  }
  
  .brand {
    flex-shrink: 0;
  }
  
  .brand-logo {
    height: 40px;
  }
  
  .brand-name {
    display: none;
  }
  
  .site-nav {
    justify-content: flex-end;
    width: auto;
    flex-shrink: 0;
  }
  
  .site-nav a:not(.nav-cta) {
    display: none;
  }
  
  .site-nav .nav-cta {
    display: inline-flex;
  }
  
  .section-title {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
  }
  
  .section-subtitle {
    font-size: 1rem;
    margin-bottom: var(--spacing-lg);
  }
  
  .contact-inner {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    text-align: center;
  }
  
  .contact-info .section-title,
  .contact-info .section-subtitle {
    text-align: center;
  }
  
  .contact-info .actions {
    justify-content: center;
  }
  
  .container {
    padding: 0 var(--spacing-md);
  }
  
  .section-intro,
  .section-platforms,
  .section-products,
  .section-videos,
  .section-contact {
    padding: var(--spacing-2xl) 0;
  }
  
  .intro-grid,
  .platform-grid,
  .products-grid,
  .videos-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .carousel-btn {
    width: 44px;
    height: 44px;
  }
  
  .carousel-btn.prev {
    left: var(--spacing-sm);
  }
  
  .carousel-btn.next {
    right: var(--spacing-sm);
  }
  
  .slide-caption {
    left: var(--spacing-md);
    bottom: var(--spacing-md);
    padding: var(--spacing-md);
    max-width: calc(100% - var(--spacing-xl));
  }
  
  .contact-qr img {
    width: 200px;
    height: 200px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 var(--spacing-sm);
  }
  
  .brand-logo {
    height: 36px;
  }
  
  .site-nav .nav-icon {
    width: 40px;
    height: 40px;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .btn {
    padding: 12px 20px;
    font-size: 0.85rem;
  }
  
  .card-body {
    padding: var(--spacing-md);
  }
  
  .intro-card,
  .platform-card {
    padding: var(--spacing-md);
  }
  
  .platform-card {
    grid-template-columns: 60px 1fr;
    gap: var(--spacing-md);
  }
  
  .platform-cta {
    grid-column: 1 / -1;
    margin-top: var(--spacing-sm);
    text-align: center;
  }
  
  .platform-icon {
    width: 60px;
    height: 60px;
    font-size: 1.5rem;
  }
}

/* 现代化入场动画 */
.reveal {
  opacity: 0;
  transform: translateY(40px) scale(0.95);
  filter: blur(10px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              filter 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0) scale(1);
  filter: blur(0);
}

/* 交错动画 */
.intro-card:nth-child(1) { transition-delay: 0.1s; }
.intro-card:nth-child(2) { transition-delay: 0.2s; }
.intro-card:nth-child(3) { transition-delay: 0.3s; }

.product-card:nth-child(1) { transition-delay: 0.1s; }
.product-card:nth-child(2) { transition-delay: 0.2s; }
.product-card:nth-child(3) { transition-delay: 0.3s; }
.product-card:nth-child(4) { transition-delay: 0.4s; }

.video-card:nth-child(1) { transition-delay: 0.1s; }
.video-card:nth-child(2) { transition-delay: 0.2s; }
.video-card:nth-child(3) { transition-delay: 0.3s; }

.platform-card:nth-child(1) { transition-delay: 0.1s; }
.platform-card:nth-child(2) { transition-delay: 0.2s; }

/* 现代化悬浮返回顶部按钮 */
.fab-to-top {
  position: fixed;
  right: var(--spacing-lg);
  bottom: var(--spacing-xl);
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--gradient-primary);
  color: white;
  display: grid;
  place-items: center;
  border: none;
  box-shadow: var(--shadow-glow), var(--shadow-xl);
  transform: translateY(20px) scale(0.8);
  opacity: 0;
  pointer-events: none;
  transition: all var(--transition-base);
  z-index: 1000;
  font-size: 1.25rem;
  font-weight: 700;
  backdrop-filter: blur(20px);
  border: 2px solid rgba(255,255,255,0.2);
}

.fab-to-top::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(45deg, 
    rgba(255,255,255,0.2) 0%, 
    transparent 50%, 
    rgba(255,255,255,0.1) 100%);
  border-radius: inherit;
  opacity: 0;
  transition: opacity var(--transition-fast);
}

.fab-to-top:hover::before {
  opacity: 1;
}

.fab-to-top.is-show {
  opacity: 1;
  transform: translateY(0) scale(1);
  pointer-events: auto;
}

.fab-to-top:hover {
  transform: translateY(-4px) scale(1.1);
  box-shadow: 0 0 50px rgba(220,38,38,0.6), var(--shadow-2xl);
  border-color: rgba(255,255,255,0.4);
}

/* 性能优化 */
.card,
.btn,
.carousel-btn,
.fab-to-top {
  will-change: transform;
}

/* 无障碍优化 */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    transition-delay: 0ms !important;
  }
  
  .reveal {
    transform: none !important;
    opacity: 1 !important;
    filter: none !important;
  }
}

/* 暗色模式支持准备 */
@media (prefers-color-scheme: dark) {
  /* 预留暗色模式变量，可根据需要启用 */
}