/* CSS Variables */
:root {
  /* 主色调 - 公安蓝 */
  --primary-white: #FFFFFF;
  --primary-gray: #F8FAFC;
  --primary-blue: #003D79;
  --accent-blue: #0056A3;
  --accent-light-blue: #0066CC;
  
  /* 辅助色 */
  --text-primary: #0F172A;
  --text-secondary: #64748B;
  --text-light: #94A3B8;
  --border-light: #E2E8F0;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
  
  /* 间距 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
  --spacing-3xl: 96px;
  
  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset & Base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Microsoft YaHei', 'Segoe UI', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--primary-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-primary);
}

h1 {
  font-size: 48px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 36px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 24px;
}

h4 {
  font-size: 20px;
}

p {
  color: var(--text-secondary);
  line-height: 1.8;
}

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

/* Section */
.section {
  padding: var(--spacing-3xl) 0;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

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

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: all var(--transition-base);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

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

.logo {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.logo-icon {
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 16px;
  white-space: nowrap;
  text-decoration: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), filter var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.logo-icon:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
  filter: brightness(1.08);
}

.logo-icon:active {
  transform: translateY(0);
  filter: brightness(0.95);
}

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

.nav-menu {
  display: flex;
  gap: var(--spacing-lg);
  list-style: none;
}

.nav-link {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--text-primary);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent-blue);
  transition: width var(--transition-base);
}

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

.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.mobile-menu-btn span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  margin: 5px 0;
  transition: all var(--transition-fast);
}

/* Hero Section */
.hero {
  position: relative;
  height: 100vh;
  min-height: 700px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('https://images.unsplash.com/photo-1518770660439-4636190af475?w=1920&q=80');
  background-size: cover;
  background-position: center;
  opacity: 0.3;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.5) 0%, rgba(30, 41, 59, 0.3) 100%);
}

.hero-content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 900px;
  padding: 0 var(--spacing-md);
}

.hero-badge {
  display: inline-block;
  color: white;
  font-size: 56px;
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 0.6s ease;
  letter-spacing: -0.02em;
  line-height: 1.2;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.35), 0 4px 12px rgba(0, 0, 0, 0.25);
}

.hero-title {
  font-size: 48px;
  font-weight: 700;
  color: white;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  animation: fadeInUp 0.6s ease 0.1s both;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.35), 0 4px 12px rgba(0, 0, 0, 0.25);
}

.hero-subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-xl);
  line-height: 1.6;
  animation: fadeInUp 0.6s ease 0.2s both;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3), 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  animation: fadeInUp 0.6s ease 0.3s both;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-md);
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition-base);
}

.btn-primary {
  background: var(--accent-blue);
  color: white;
}

.btn-primary:hover {
  background: var(--accent-light-blue);
  transform: translateY(-2px);
  box-shadow: 0 10px 20px rgba(0, 86, 163, 0.3);
}

.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);
  border-color: rgba(255, 255, 255, 0.5);
}

/* Service Overview */
.service-overview {
  background: var(--primary-gray);
}

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

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

.service-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  cursor: pointer;
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  border-color: var(--accent-blue);
}

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-blue));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: white;
}

.service-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: var(--text-primary);
}

.service-desc {
  color: var(--text-secondary);
  line-height: 1.6;
}

/* About Section */
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.about-text h2 {
  margin-bottom: var(--spacing-md);
}

.about-text p {
  margin-bottom: var(--spacing-lg);
  font-size: 17px;
}

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

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

.stat-value {
  font-size: 48px;
  font-weight: 700;
  color: var(--accent-blue);
  line-height: 1;
  margin-bottom: var(--spacing-xs);
}

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

.about-image {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 4/3;
}

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

/* Products Section */
.products {
  background: var(--primary-gray);
}

.product-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.product-card {
  background: white;
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.product-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.product-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, rgba(15, 23, 42, 0.1), rgba(0, 86, 163, 0.1));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-md);
  color: var(--primary-blue);
}

.product-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.product-desc {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

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

.feature-tag {
  padding: 4px 12px;
  background: var(--primary-gray);
  border-radius: 100px;
  font-size: 13px;
  color: var(--text-secondary);
}

/* Cases Section */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.case-card {
  background: white;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.case-card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.case-image {
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--primary-gray);
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-base);
}

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

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

.case-category {
  display: inline-block;
  padding: 4px 12px;
  background: rgba(0, 86, 163, 0.1);
  color: var(--accent-blue);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.case-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.case-desc {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
}

.case-metrics {
  display: flex;
  gap: var(--spacing-md);
}

.metric {
  display: flex;
  flex-direction: column;
}

.metric-value {
  font-size: 18px;
  font-weight: 700;
  color: var(--accent-blue);
}

/* Contact Section */
.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-2xl);
  align-items: center;
}

.contact-info h2 {
  margin-bottom: var(--spacing-md);
}

.contact-info > p {
  margin-bottom: var(--spacing-xl);
}

.contact-qrcode {
  display: flex;
  justify-content: center;
  align-items: center;
  height: 100%;
}

.qrcode-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--primary-gray);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  width: 200px;
  height: 200px;
  justify-content: center;
}

.qrcode-card img {
  width: 120px;
  height: 120px;
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  background: white;
  padding: 6px;
}

.qrcode-text-large {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.contact-details {
  display: grid;
  gap: var(--spacing-lg);
}

.contact-item {
  display: flex;
  gap: var(--spacing-md);
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--primary-gray);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-blue);
  flex-shrink: 0;
}

.contact-label {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 4px;
}

.contact-value {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
}

/* Footer */
.footer {
  background: var(--primary-blue);
  color: white;
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
}

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

.footer-brand h3 {
  color: white;
  margin-bottom: var(--spacing-sm);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: var(--spacing-md);
}

.footer-section h4 {
  color: white;
  margin-bottom: var(--spacing-md);
  font-size: 16px;
}

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

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 14px;
}

/* 智能客服悬浮按钮 */
.chatbot-float {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 1001;
}

.chatbot-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 14px;
  background: linear-gradient(135deg, var(--primary-blue), var(--accent-light-blue));
  border: 3px solid rgba(255, 255, 255, 0.95);
  border-radius: 24px;
  cursor: pointer;
  box-shadow: 0 8px 24px rgba(0, 61, 121, 0.35);
  transition: all var(--transition-base);
  color: white;
  width: 100px;
  justify-content: center;
  text-decoration: none;
}

.chatbot-btn:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 61, 121, 0.45);
}

.chatbot-btn:active {
  transform: translateY(-1px);
}

.chatbot-icon {
  width: 68px;
  height: 68px;
  display: block;
}

.chatbot-label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  white-space: nowrap;
  color: #fff;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
  animation: chatbotLabelGlow 2.6s ease-in-out infinite;
}

/* 客服对话框 */
.chatbot-modal {
  position: fixed;
  bottom: 120px;
  right: 32px;
  width: 400px;
  height: 600px;
  max-width: calc(100vw - 64px);
  max-height: calc(100vh - 160px);
  background: white;
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.25);
  z-index: 1002;
  display: none;
  flex-direction: column;
  overflow: hidden;
  opacity: 0;
  transform: translateY(20px) scale(0.95);
  transition: opacity 0.25s ease, transform 0.25s ease;
}

.chatbot-modal.active {
  display: flex;
  opacity: 1;
  transform: translateY(0) scale(1);
}

@media (max-width: 768px) {
  .chatbot-float {
    bottom: 20px;
    right: 20px;
  }

  .chatbot-btn {
    width: 84px;
    padding: 8px 10px;
    border-radius: 20px;
  }

  .chatbot-icon {
    width: 56px;
    height: 56px;
  }

  .chatbot-label {
    font-size: 11px;
  }

  .chatbot-modal {
    bottom: 90px;
    right: 20px;
    left: 20px;
    width: auto;
    height: 70vh;
    max-width: none;
  }
}

/* ===== 智能客服按钮动态效果 ===== */
@keyframes chatbotFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}

@keyframes chatbotPulseRing {
  0% {
    transform: translate(-50%, -50%) scale(0.8);
    opacity: 0.65;
  }
  70% {
    transform: translate(-50%, -50%) scale(1.45);
    opacity: 0;
  }
  100% {
    transform: translate(-50%, -50%) scale(1.45);
    opacity: 0;
  }
}

@keyframes chatbotDotPulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(76, 217, 100, 0.7); }
  70% { box-shadow: 0 0 0 8px rgba(76, 217, 100, 0); }
}

@keyframes chatbotIconWiggle {
  0%, 100% { transform: rotate(0deg); }
  20% { transform: rotate(-6deg); }
  40% { transform: rotate(5deg); }
  60% { transform: rotate(-3deg); }
  80% { transform: rotate(2deg); }
}

@keyframes chatbotBlink {
  0%, 90%, 100% { transform: scaleY(1); }
  95% { transform: scaleY(0.1); }
}

@keyframes chatbotLabelGlow {
  0%, 100% { opacity: 0.85; text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3); }
  50% { opacity: 1; text-shadow: 0 1px 4px rgba(0, 0, 0, 0.45); }
}

/* 按钮：整体浮动 */
.chatbot-float .chatbot-btn {
  position: relative;
  z-index: 1;
  animation: chatbotFloat 3.5s ease-in-out infinite;
}

/* 外圈脉冲光环 */
.chatbot-pulse-ring {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 96px;
  height: 96px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 102, 204, 0.4) 0%, rgba(0, 102, 204, 0) 70%);
  transform: translate(-50%, -50%) scale(0.8);
  pointer-events: none;
  z-index: 0;
  animation: chatbotPulseRing 2.4s ease-out infinite;
}

/* 在线状态绿点 */
.chatbot-online-dot {
  position: absolute;
  top: 8px;
  right: 14px;
  width: 12px;
  height: 12px;
  background: #4cd964;
  border: 2px solid #fff;
  border-radius: 50%;
  z-index: 2;
  animation: chatbotDotPulse 2s infinite;
}

/* 图标容器：间歇摆动 */
.chatbot-icon-wrap {
  display: block;
  width: 68px;
  height: 68px;
  transform-origin: 50% 80%;
  animation: chatbotIconWiggle 5s ease-in-out infinite;
  animation-delay: 1.2s;
}

/* 眨眼 */
.chatbot-eye {
  transform-box: fill-box;
  transform-origin: center;
  animation: chatbotBlink 4.5s infinite;
}
.chatbot-eye:nth-of-type(2) {
  animation-delay: 0.12s;
}

/* 悬停：暂停浮动 + 图标放大 + 光环加速 */
.chatbot-btn:hover {
  animation-play-state: paused;
}
.chatbot-btn:hover .chatbot-icon-wrap {
  animation-play-state: paused;
  transform: scale(1.1);
  transition: transform 0.3s ease;
}
.chatbot-btn:hover ~ .chatbot-pulse-ring {
  animation-duration: 1.2s;
}

@media (max-width: 768px) {
  .chatbot-pulse-ring {
    width: 80px;
    height: 80px;
  }
  .chatbot-online-dot {
    top: 6px;
    right: 10px;
    width: 10px;
    height: 10px;
  }
  .chatbot-icon-wrap,
  .chatbot-icon {
    width: 56px;
    height: 56px;
  }
}

/* 尊重用户系统设置：减少动效 */
@media (prefers-reduced-motion: reduce) {
  .chatbot-float .chatbot-btn,
  .chatbot-pulse-ring,
  .chatbot-online-dot,
  .chatbot-icon-wrap,
  .chatbot-eye,
  .chatbot-label {
    animation: none !important;
  }
}

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

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

@media (max-width: 768px) {
  /* 全局 */
  h1 {
    font-size: 28px;
  }
  
  h2 {
    font-size: 24px;
  }

  h3 {
    font-size: 20px;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

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

  .section-title {
    font-size: 26px;
  }

  .section-subtitle {
    font-size: 15px;
  }

  /* 导航栏 */
  .header-content {
    height: 64px;
  }

  .logo {
    gap: var(--spacing-xs);
  }

  .logo-icon {
    padding: 6px 12px;
    font-size: 13px;
  }

  .nav-menu {
    display: none;
  }

  .mobile-menu-btn {
    display: block;
  }

  /* Hero */
  .hero {
    min-height: 100vh;
    padding: 80px 0 40px;
  }

  .hero-badge {
    font-size: 26px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-subtitle {
    font-size: 15px;
    margin-bottom: var(--spacing-lg);
  }

  .hero-cta {
    flex-direction: column;
    gap: var(--spacing-sm);
  }

  .btn {
    padding: 12px 24px;
    font-size: 15px;
    width: 100%;
    justify-content: center;
  }

  /* 关于我们 */
  .about-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }

  .about-text p {
    font-size: 15px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
  }

  .stat-value {
    font-size: 36px;
  }

  .about-image {
    order: -1;
  }

  /* 产品中心 */
  .product-grid {
    grid-template-columns: 1fr;
  }

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

  .product-title {
    font-size: 18px;
  }

  /* 案例展示 */
  .cases-grid {
    grid-template-columns: 1fr;
  }

  .case-content {
    padding: var(--spacing-lg);
  }

  .case-title {
    font-size: 18px;
  }

  .case-metrics {
    flex-wrap: wrap;
  }

  /* 联系我们 */
  .contact-content {
    grid-template-columns: 1fr;
  }

  .contact-info > p {
    margin-bottom: var(--spacing-lg);
  }

  .qrcode-card {
    width: 180px;
    height: 180px;
    padding: 12px;
  }

  .qrcode-card img {
    width: 100px;
    height: 100px;
  }

  .qrcode-text-large {
    font-size: 12px;
  }

  /* 页脚 */
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-badge {
    font-size: 22px;
  }

  .hero-title {
    font-size: 24px;
  }

  .hero-subtitle {
    font-size: 14px;
  }

  .section-title {
    font-size: 22px;
  }

  .about-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
  }

  .stat-value {
    font-size: 28px;
  }

  .stat-label {
    font-size: 12px;
  }

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

  .service-title {
    font-size: 17px;
  }
}