* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  user-select: none;
  -webkit-user-select: none;
  -moz-user-select: none;
}
a {
  text-decoration: none;
  color: var(--color-gray-3);
}
#particles-js {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: -1;
  background: linear-gradient(
    135deg,
    var(--color-gray-1) 0%,
    var(--color-gray-2) 100%
  );
}

html {
  scroll-behavior: smooth;
  max-width: 100vw;
  overflow-x: auto;
}

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "SF Pro Display", var(--font-family-zh);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-normal);
  color: var(--color-gray-4);
  background: linear-gradient(135deg, #f8fafc 0%, #e8f4f8 100%);
  line-height: 1.6;
  overflow-x: hidden;
}

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

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

.section.bg-gray {
  background: transparent;
}

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

.section-title {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-5);
  margin-bottom: var(--spacing-xs);
}

.showcase-content .section-title {
  color: white;
}

.section-subtitle {
  font-size: var(--font-size-body);
  color: var(--color-gray-3);
}

.showcase-content .section-subtitle {
  color: rgba(255, 255, 255, 0.8);
}

.video-subtitle {
  color: var(--color-white) !important;
  font-size: 24px;
  font-weight: var(--font-weight-medium);
}

.card {
  background: var(--color-gray-2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(66, 66, 66, 0.5);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  padding: var(--spacing-md);
  transition: all var(--transition-normal);
}

.card:hover {
  background: var(--color-gray-2);
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-primary-light-1);
  transform: translateY(-2px);
}

.card.highlight {
  border: 1px solid var(--color-primary);
  background: var(--color-gray-2);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.btn {
  display: inline-block;
  padding: 12px 28px;
  font-size: var(--font-size-btn);
  font-weight: var(--font-weight-medium);
  border-radius: var(--radius-btn);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  text-align: center;
}

.btn-primary {
  background: rgba(0, 168, 232, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-white);
  box-shadow: var(--shadow-btn-hover);
  border: 1px solid rgba(66, 66, 66, 0.5);
}

.btn-primary:hover {
  background: rgba(64, 196, 255, 0.8);
  box-shadow: var(--shadow-btn-hover);
  transform: translateY(-1px);
}

.btn-primary:active {
  background: rgba(2, 136, 209, 0.8);
  transform: scale(0.98);
}

.btn-primary:disabled {
  background: rgba(0, 168, 232, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-white);
  cursor: not-allowed;
  box-shadow: none;
  border: 1px solid rgba(66, 66, 66, 0.5);
}

.btn-secondary {
  background: rgba(0, 168, 232, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-white);
  box-shadow: var(--shadow-btn-hover);
  border: 1px solid rgba(66, 66, 66, 0.5);
}

.btn-secondary:hover {
  background: rgba(64, 196, 255, 0.8);
  box-shadow: var(--shadow-btn-hover);
  transform: translateY(-1px);
}

.btn-secondary:active {
  background: rgba(2, 136, 209, 0.8);
  transform: scale(0.98);
}

.btn-secondary:disabled {
  background: rgba(0, 168, 232, 0.5);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-white);
  cursor: not-allowed;
  box-shadow: none;
  border: 1px solid rgba(66, 66, 66, 0.5);
}

.btn-text {
  background-color: transparent;
  color: var(--color-primary);
  padding: 0;
  font-size: var(--font-size-body);
}

.btn-text:hover {
  color: var(--color-primary-light-1);
  text-decoration: underline;
}

.btn-text:active {
  color: var(--color-primary-dark-1);
}

.btn-text:disabled {
  color: var(--color-gray-3);
  cursor: not-allowed;
  text-decoration: none;
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(30, 30, 30, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(66, 66, 66, 0.5);
  box-shadow: var(--shadow-nav);
  z-index: 1000;
  height: var(--navbar-height);
  transition: all var(--transition-normal);
}

.navbar.scrolled {
  background: rgba(30, 30, 30, 0.9);
  box-shadow: var(--shadow-card);
}

.navbar-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--navbar-height);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  font-size: 22px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
}

.logo-text {
  font-weight: var(--font-weight-normal);
}

.logo i {
  font-size: 24px;
  color: var(--color-white);
}

.logo-image {
  width: 24px;
  height: 24px;
  object-fit: contain;
}

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

.nav-link {
  text-decoration: none;
  font-size: var(--font-size-body);
  color: #ddd;
  padding: 8px 0;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link:hover {
  color: var(--color-primary-light-1);
}

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

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

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

.theme-toggle {
  background: none;
  border: none;
  font-size: 20px;
  color: var(--color-gray-5);
  cursor: pointer;
  padding: var(--spacing-xs);
  border-radius: var(--radius-btn);
  transition: all var(--transition-normal);
}

.theme-toggle:hover {
  background: var(--color-gray-2);
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-gray-5);
  cursor: pointer;
}

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  margin-top: var(--navbar-height);
  overflow: hidden;
  background: linear-gradient(
    135deg,
    var(--color-gray-6) 0%,
    var(--color-gray-5) 100%
  );
}

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

.hero-video {
  position: absolute;
  top: 50%;
  left: 50%;
  min-width: 100%;
  min-height: 100%;
  width: auto;
  height: auto;
  transform: translate(-50%, -50%);
  object-fit: cover;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  padding: 0 var(--spacing-md);
}

.hero-title {
  font-size: 48px;
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
  animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
  font-size: 20px;
  color: rgba(255, 255, 255, 0.8);
  margin-bottom: var(--spacing-lg);
  animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease-out 0.4s backwards;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-lg);
  left: 50%;
  transform: translateX(-50%);
  color: rgba(255, 255, 255, 0.6);
  font-size: 24px;
  animation: bounce-centered 2s infinite;
}

.video-scroll {
  position: relative;
  margin-top: 20px;
  text-align: center;
  color: var(--color-gray-4);
  font-size: 20px;
  opacity: 0.7;
  animation: bounce 2s infinite;
}

.video-scroll i {
  animation: bounce 2s infinite;
}

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

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

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

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
}

.advantage-card {
  text-align: center;
}

.advantage-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-md);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    var(--color-primary-light-2) 0%,
    var(--color-primary) 100%
  );
  border-radius: 50%;
  font-size: 36px;
  color: var(--color-white);
}

.showcase-section {
  padding-top: 0;
  position: relative;
}

.showcase-video-container {
  padding: 0;
  overflow: hidden;
  position: relative;
}

.showcase-video {
  width: 100%;
  height: auto;
  display: block;
  border-radius: 15px;
}

.showcase-header {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 30px 20px 40px;
  background: linear-gradient(to bottom, rgba(0, 0, 0, 0.8), transparent);
  z-index: 10;
}

.showcase-header .section-subtitle {
  font-size: 20px;
}

.showcase-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 30px 20px 30px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
  border-radius: 0 0 15px 15px;
}

.advantage-combined {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.advantage-item {
  text-align: left;
}

.advantage-item h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: white;
  margin-bottom: 4px;
}

.advantage-item p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 15px;
  margin: 0;
}

.space-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-md);
  background: rgba(30, 30, 30, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(66, 66, 66, 0.3);
  border-radius: var(--radius-card);
  transition: all var(--transition-normal);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.stat-card:hover {
  transform: translateY(-2px);
  background: rgba(30, 30, 30, 0.7);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border-color: var(--color-primary-light-1);
}

.stat-number {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.stat-label {
  font-size: var(--font-size-small);
  color: var(--color-gray-4);
  font-weight: 500;
}

.city-gallery {
  margin: var(--spacing-xl) 0;
}

.city-slider {
  position: relative;
  padding: var(--spacing-md);
  overflow: hidden;
  background: rgba(30, 30, 30, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(66, 66, 66, 0.3);
  border-radius: var(--radius-card);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.slider-track {
  display: flex;
  align-items: center;
  padding: 20px 0;
  transition: transform 0.5s ease-out;
  width: 100%;
}

.city-slide {
  flex: 0 0 68%;
  position: relative;
  transition: all 0.5s ease-out;
  opacity: 0.4;
  transform: scale(0.8);
  min-width: 0;
}

.city-slide.prev-slide,
.city-slide.next-slide {
  opacity: 0.4;
  transform: scale(0.8);
}

.city-slide.prev-slide::after,
.city-slide.next-slide::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(255, 255, 255, 0.5);
  border-radius: var(--radius-card);
}

.city-slide.active {
  opacity: 1;
  transform: scale(1);
}

.city-slide.active::after {
  content: none;
}

.city-slide img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  background-color: rgba(0, 0, 0, 0.05);
  display: block;
  border-radius: var(--radius-card);
}

.slider-arrows {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
}

.city-caption-center {
  text-align: center;
  margin-top: var(--spacing-md);
  position: relative;
}

.city-caption-center .city-name {
  font-size: 24px;
  color: var(--color-white);
  font-weight: var(--font-weight-semibold);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
  transition: all var(--transition-normal);
  letter-spacing: 1px;
  position: relative;
  bottom: 0;
  left: -15%;
  transform: none;
  display: inline-block;
  background: transparent;
  padding: 0;
  border-radius: 0;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  box-shadow: none;
  z-index: 10;
  text-align: center;
  overflow: visible;
}

.city-slide img {
  width: 100%;
  height: auto;
  aspect-ratio: 16/9;
  object-fit: cover;
  border-radius: var(--radius-card);
  transition: all var(--transition-normal);
}

.city-caption-center .city-name::before {
  content: "数字孪生城市底座：";
  font-size: var(--font-size-body);
  color: var(--color-primary-light-1);
  font-weight: 500;
  margin-right: var(--spacing-xs);
  position: relative;
  z-index: 1;
}

.city-caption-center .city-name:hover {
  transform: translateY(-2px);
}

.city-caption-center .city-name.active {
  animation: fadeInUp 0.5s ease-out;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.city-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 20px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: white;
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
}

.slider-dots {
  position: absolute;
  bottom: 16px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 10;
}

.slider-dots .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.slider-dots .dot.active {
  background: white;
  width: 24px;
  border-radius: 5px;
}

.slider-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border: none;
  background: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(15px);
  -webkit-backdrop-filter: blur(15px);
  border-radius: 50%;
  color: var(--color-white);
  font-size: 14px;
  cursor: pointer;
  z-index: 10;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.showcase-section .slider-arrow {
  display: none;
}

.slider-arrow:hover {
  background: rgba(255, 255, 255, 0.5);
  transform: translateY(-50%) scale(1.05);
}

.slider-arrow.prev {
  left: 30px;
}

.slider-arrow.next {
  right: 30px;
}

.lod-timeline {
  max-width: 100%;
  margin: 0 auto;
  position: relative;
  display: flex;
  gap: var(--spacing-md);
  overflow-x: auto;
  padding: var(--spacing-lg) 0;
  scrollbar-width: none;
  -ms-overflow-style: none;
}

.lod-timeline::-webkit-scrollbar {
  display: none;
}

.lod-item {
  flex: 0 0 200px;
  position: relative;
  transition: all var(--transition-normal);
  cursor: pointer;
  height: 420px;
}

.lod-item:hover {
  transform: translateY(-5px);
}

.lod-content {
  opacity: 0.7;
  transition: all var(--transition-normal);
  position: relative;
  background: none;
  border: none;
  box-shadow: none;
  padding: 0;
  height: 100%;
}

.lod-item:hover .lod-content {
  opacity: 1;
}

.lod-item.active .lod-content {
  opacity: 1;
}

.lod-image {
  width: 100%;
  height: 100%;
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all var(--transition-normal);
  box-shadow: var(--shadow-card);
  position: relative;
}

.lod-image::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  border-radius: var(--radius-card);
  transition: all var(--transition-normal);
  z-index: 1;
}

.lod-item:hover .lod-image::before {
  background: transparent;
}

.lod-item.active .lod-image::before {
  background: transparent;
}

.lod-item:hover .lod-image {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
  transform: scale(1.02);
}

.lod-item.active .lod-image {
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
  transform: scale(1.02);
}

.lod-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-card);
  transition: all var(--transition-normal);
}

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

.lod-item.active .lod-image img {
  transform: scale(1.05);
}

.lod-content .lod-text {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--spacing-md);
  background: linear-gradient(
    to bottom,
    rgba(0, 0, 0, 0.6),
    transparent,
    rgba(0, 0, 0, 0.6)
  );
  color: var(--color-white);
  border-radius: var(--radius-card);
  transition: all var(--transition-normal);
  opacity: 0;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  z-index: 2;
}

.lod-item:hover .lod-content .lod-text {
  opacity: 1;
}

.lod-item.active .lod-content .lod-text {
  opacity: 1;
}

.lod-content h3 {
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-medium);
  color: var(--color-white);
  margin-bottom: var(--spacing-xs);
  transition: all var(--transition-normal);
}

/* 行业案例布局 */
.cases-layout {
  display: flex;
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
  align-items: flex-start;
}

.cases-sidebar {
  flex: 0 0 180px;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
  align-self: stretch;
  overflow-y: auto;
  max-height: 100%;
}

.cases-content {
  flex: 1;
}

.cases-menu {
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  height: 100%;
  padding-top: 0;
}

.cases-menu-item {
  padding: 8px 12px;
  background: rgba(30, 30, 30, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(66, 66, 66, 0.3);
  border-radius: var(--radius-btn);
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  font-size: var(--font-size-small);
  font-weight: 500;
  color: var(--color-gray-4);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.cases-menu-item:hover {
  transform: translateY(-2px);
  background: rgba(30, 30, 30, 0.7);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border-color: var(--color-primary-light-1);
  color: var(--color-white);
}

.cases-menu-item.active {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
  border: 1px solid var(--color-primary);
}

.cases-content {
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 0;
}

.case-item {
  display: none;
}

.case-item.active {
  display: block;
  animation: fadeInUp 0.5s ease-out;
}

.case-image {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  margin-bottom: 0;
  aspect-ratio: 16/9;
  width: 100%;
}

.case-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transform: scale(1);
  transition: transform var(--transition-normal);
}

.case-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: transparent;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-end;
  gap: var(--spacing-md);
  opacity: 1;
  padding: var(--spacing-lg) var(--spacing-lg) calc(var(--spacing-lg) * 2);
  text-align: center;
}

/*.case-image:hover img {
    transform: scale(1.2);
}*/

.case-overlay h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-white);
  margin-bottom: var(--spacing-md);
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.8);
}

.case-overlay p {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-body);
  line-height: 1.6;
  margin-bottom: var(--spacing-lg);
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.8);
  max-width: 80%;
}

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

.case-btn {
  padding: 8px 20px;
  background: rgba(0, 168, 232, 0.8);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  color: var(--color-white);
  border: none;
  border-radius: var(--radius-btn);
  font-size: var(--font-size-small);
  font-weight: 500;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  align-items: center;
  gap: 8px;
  height: 36px;
}

.case-btn:hover {
  background: rgba(64, 196, 255, 0.8);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 168, 232, 0.3);
}

.case-info {
  display: none;
}

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

.case-stat {
  text-align: center;
  padding: var(--spacing-md);
  background: rgba(66, 66, 66, 0.2);
  border-radius: var(--radius-card);
  transition: all var(--transition-normal);
}

.case-stat:hover {
  background: rgba(66, 66, 66, 0.3);
  transform: translateY(-2px);
}

.case-stat .stat-number {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.case-stat .stat-label {
  font-size: var(--font-size-small);
  color: var(--color-gray-4);
  font-weight: 500;
}

.lod-content p {
  color: rgba(255, 255, 255, 0.9);
  font-size: 12px;
  transition: all var(--transition-normal);
  line-height: 1.5;
  letter-spacing: 0.5px;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
}

.product-card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.product-icon {
  width: 70px;
  height: 70px;
  margin-bottom: var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(
    135deg,
    var(--color-primary) 0%,
    var(--color-primary-light-1) 100%
  );
  border-radius: var(--radius-btn);
  font-size: 32px;
  color: var(--color-white);
}

.product-card h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-5);
  margin-bottom: var(--spacing-sm);
}

.product-name {
  font-size: var(--font-size-small);
  color: var(--color-primary);
  font-weight: var(--font-weight-medium);
}

.product-card p {
  flex: 1;
  margin-bottom: var(--spacing-md);
}

.product-card .btn-text {
  align-self: flex-start;
}

.product-video {
  width: 100%;
  margin-bottom: var(--spacing-sm);
  border-radius: 8px;
  overflow: hidden;
}

.product-video video {
  width: 100%;
  height: 160px;
  object-fit: cover;
  display: block;
  border-radius: 8px;
}

.cases-map-container {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 16px;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.04);
  padding: var(--spacing-md);
  overflow: hidden;
}

.cases-map {
  position: relative;
  width: 100%;
  min-height: 500px;
}

.cases-map canvas {
  display: block;
  width: 100%;
  height: auto;
}

.map-legend {
  position: absolute;
  bottom: var(--spacing-sm);
  right: var(--spacing-sm);
  background: rgba(255, 255, 255, 0.9);
  padding: var(--spacing-sm);
  border-radius: var(--radius-btn);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
  font-size: var(--font-size-small);
}

.legend-item i {
  margin-right: 6px;
}

.legend-item:first-child i {
  color: var(--color-primary);
}

.legend-item:last-child i {
  color: var(--color-primary-light-2);
}

.culture-card {
  text-align: center;
  padding: 0 !important;
  background: none !important;
  border: none !important;
  box-shadow: none !important;
  transition: none !important;
}

.culture-card:hover {
  transform: none !important;
  box-shadow: none !important;
  background: none !important;
}

.culture-card h3 {
  font-size: var(--font-size-h3);
  font-weight: var(--font-weight-semibold);
  color: var(--color-gray-5);
  margin-bottom: var(--spacing-lg);
}

.values-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
  text-align: left;
}

.value-item {
  padding: var(--spacing-md);
  background: rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-card);
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}

.value-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
}

.value-item h4 {
  font-size: var(--font-size-h4);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.value-item p {
  font-size: var(--font-size-base);
  color: var(--color-gray-4);
  line-height: 1.6;
}

.values-summary {
  font-size: var(--font-size-base);
  color: var(--color-gray-4);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.footer {
  background: rgba(30, 30, 30, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  color: var(--color-gray-3);
  padding: var(--spacing-md) 0 var(--spacing-xs);
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1.5fr;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-column h3 {
  font-size: var(--font-size-h3);
  color: var(--color-white);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 2px solid rgba(255, 255, 255, 0.2);
}

.footer-contact-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  color: var(--color-gray-3);
  font-size: var(--font-size-body);
  line-height: 1.6;
}

.contact-item i {
  color: var(--color-primary);
  font-size: 18px;
  margin-top: 2px;
  min-width: 20px;
}

.footer-qrcode-wrapper {
  display: flex;
  justify-content: flex-start;
  align-items: flex-start;
}

.footer-qrcode {
  text-align: center;
}

.footer-qrcode-img {
  width: 280px;
  height: auto;
  border-radius: 8px;
  display: block;
  margin-bottom: var(--spacing-xs);
  margin-left: auto;
  margin-right: auto;
}

.qrcode-placeholder {
  width: 80px;
  height: 80px;
  background: var(--color-white);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-xs);
  margin-left: auto;
  margin-right: auto;
}

.qrcode-placeholder i {
  font-size: 32px;
  color: var(--color-gray-5);
}

.footer-qrcode p {
  color: var(--color-gray-3);
  font-size: var(--font-size-small);
  margin: 0;
}

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

.footer-links .link-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-md);
}

.footer-link {
  color: var(--color-gray-3);
  font-size: var(--font-size-body);
  transition: color var(--transition-fast);
  text-decoration: none;
}

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

.footer-bottom {
  padding: 20px 0;
  /* padding-top: var(--spacing-lg); */
}

.footer-bottom-content {
  display: flex;
  justify-content: center;
  align-items: center;
}

.footer-bottom-content p {
  color: var(--color-gray-3);
  margin: 0;
}

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

.footer-cert span {
  color: var(--color-gray-3);
  font-size: var(--font-size-small);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.footer-cert i {
  color: var(--color-primary);
}

.toast-container {
  position: fixed;
  top: var(--spacing-lg);
  right: var(--spacing-md);
  z-index: 2000;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xs);
}

.toast {
  min-width: 300px;
  padding: 16px 20px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 255, 255, 0.9);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
  from {
    transform: translateX(100%);
    opacity: 0;
  }
  to {
    transform: translateX(0);
    opacity: 1;
  }
}

.toast.success {
  background-color: var(--color-success);
  color: var(--color-white);
}

.toast.error {
  background-color: var(--color-error);
  color: var(--color-white);
}

.toast.warning {
  background-color: var(--color-warning);
  color: var(--color-white);
}

/* 留言表单样式 */
.message-form-wrapper {
  margin-bottom: var(--spacing-md);
}

.message-form {
  margin-top: var(--spacing-sm);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-sm);
}

.form-group {
  display: flex;
  flex-direction: column;
}

.form-input,
.form-textarea {
  padding: 0.6rem 0.8rem;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 6px;
  color: #ffffff;
  font-size: 0.9rem;
  transition:
    border-color 0.3s,
    background 0.3s;
}

.form-input:focus,
.form-textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  background: rgba(255, 255, 255, 0.12);
}

.form-input::placeholder,
.form-textarea::placeholder {
  color: var(--color-gray-4);
}

.form-textarea {
  resize: vertical;
  min-height: 80px;
}

.btn-full {
  width: 100%;
  margin-top: var(--spacing-xs);
}

@media (max-width: 968px) {
  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  .form-row {
    grid-template-columns: 1fr;
  }
  /* 案例板块移动端适配 */
  .cases-layout {
    flex-direction: column;
    gap: 12px;
    margin-top: var(--spacing-lg);
  }
  .cases-sidebar {
    flex: 0 0 auto;
    width: 100%;
    overflow-x: auto;
    overflow-y: visible;
    max-height: none;
    align-self: flex-start;
    padding-bottom: 4px;
  }
  .cases-menu {
    flex-direction: row;
    flex-wrap: nowrap;
    gap: 6px;
    height: auto;
  }
  .cases-menu-item {
    padding: 4px 8px;
    font-size: 12px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .cases-content {
    width: 100%;
  }
  .case-item {
    margin-bottom: 0;
  }
  .case-image {
    aspect-ratio: 4/3;
  }
  .case-overlay {
    padding: 16px 16px 24px;
    gap: 8px;
  }
  .case-overlay h3 {
    font-size: 18px;
    margin-bottom: 4px;
  }
  .case-overlay p {
    font-size: 13px;
    line-height: 1.5;
  }
  /* 产品区域移动端适配 */
  .products-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  .product-card {
    min-height: 280px;
  }
  /* 导航栏移动端适配 */
  .navbar-content {
    padding: var(--spacing-xs) 0;
  }
  .nav-link {
    font-size: 14px;
    padding: 6px 8px;
  }
  /* hero区域移动端适配 */
  .hero-title {
    font-size: 34px;
    white-space: nowrap;
    line-height: 1.2;
  }
  .hero-subtitle {
    font-size: 16px;
  }
  .hero-description {
    font-size: 14px;
    line-height: 1.6;
  }
  /* section标题移动端适配 */
  .section-title {
    font-size: 28px;
  }
  .section-subtitle {
    font-size: 18px;
  }
  /* about区域移动端适配 */
  .about-cards {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }
  .culture-card p {
    font-size: 14px;
    line-height: 1.7;
  }
  .value-item h4 {
    font-size: 16px;
  }
  .value-item p {
    font-size: 13px;
  }
  /* showcase-header移动端适配 - 文字和图片分开 */
  .showcase-section {
    padding-top: 0;
  }
  .showcase-video-container {
    border-radius: 12px;
    overflow: hidden;
  }
  .showcase-header {
    position: relative;
    padding: 16px 16px 8px;
    background: rgba(30, 30, 30, 0.8);
  }
  .showcase-header .section-subtitle {
    font-size: 18px;
    line-height: 1.4;
  }
  .showcase-content {
    position: relative;
    padding: 8px 16px 16px;
    background: rgba(30, 30, 30, 0.8);
    border-radius: 0 0 12px 12px;
  }
  .advantage-combined {
    grid-template-columns: 1fr;
    gap: var(--spacing-sm);
  }
  .advantage-item h3 {
    font-size: 15px;
    margin-bottom: 2px;
  }
  .advantage-item p {
    font-size: 13px;
    line-height: 1.5;
  }
  /* lod-timeline移动端竖向排版 */
  .lod-timeline {
    flex-direction: column;
    gap: var(--spacing-md);
    overflow-x: visible;
  }
  .lod-item {
    flex: 0 0 auto;
    height: auto;
  }
  .lod-content {
    min-height: 200px;
    opacity: 1 !important;
  }
  .lod-image {
    height: 200px;
  }
  .lod-image img {
    height: 200px;
  }
  .lod-content .lod-text {
    opacity: 1;
  }
  .lod-image::before {
    background: transparent !important;
  }
  .lod-item:hover .lod-content,
  .lod-item.active .lod-content {
    opacity: 1;
  }
  .lod-item:hover .lod-image::before,
  .lod-item.active .lod-image::before {
    background: transparent;
  }
  .lod-item:hover .lod-image,
  .lod-item.active .lod-image {
    transform: none;
    box-shadow: var(--shadow-card);
  }
  .lod-item:hover .lod-image img,
  .lod-item.active .lod-image img {
    transform: none;
  }
  /* product-tab按钮移动端适配 */
  .products-section .product-tabs {
    justify-content: center;
  }
  .products-section .product-tab {
    padding: 6px 10px;
    font-size: 10px;
    min-width: auto;
    width: auto;
    max-width: none;
    text-align: center;
    flex-shrink: 0;
  }
  .products-section .product-tab .product-name {
    font-size: 9px;
    max-width: 120px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    display: block;
    margin-top: 2px;
  }
  /* product-info移动端适配 */
  .products-section .product-info {
    padding: var(--spacing-md) var(--spacing-md);
  }
  .products-section .product-info p {
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
  }
  .products-section .product-info .btn {
    font-size: 13px;
    padding: 8px 16px;
  }
  /* city-slider移动端适配 - 全屏图片布局 */
  .city-slider {
    position: relative;
    padding: 0;
    background: rgba(30, 30, 30, 0.6);
    border-radius: 12px;
    overflow: hidden;
  }
  .slider-track {
    width: 100%;
  }
  .city-slide {
    flex: 0 0 100%;
    position: relative;
  }
  .city-slide img {
    width: 100%;
    height: auto;
    aspect-ratio: 16/9;
    border-radius: 0;
    object-fit: cover;
  }
  .city-caption-center {
    position: relative;
    top: auto;
    left: auto;
    right: auto;
    transform: none;
    text-align: center;
    z-index: 10;
    margin-top: 0;
    padding: var(--spacing-sm);
    background: rgba(30, 30, 30, 0.8);
  }
  .city-caption-center .city-name {
    font-size: 16px;
    text-align: center;
    width: auto;
    background: transparent;
    padding: 0;
    border-radius: 0;
    display: inline;
    margin: 0 auto;
  }
  .city-caption-center .city-name::before {
    font-size: 12px;
    content: "数字孪生城市：";
  }
  .city-slider .slider-arrow {
    display: none;
  }
}

.toast.info {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* 产品平台部分样式 */
.products-section .product-tabs {
  display: flex;
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
  margin-bottom: var(--spacing-lg);
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--spacing-sm);
  padding-right: var(--spacing-md);
  padding-left: 1px;
  justify-content: center;
  scroll-behavior: smooth;
}

.products-section .product-tab-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.products-section .product-tab {
  padding: var(--spacing-md) var(--spacing-lg);
  background: rgba(30, 30, 30, 0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(66, 66, 66, 0.3);
  border-radius: var(--radius-card);
  cursor: pointer;
  transition: all var(--transition-normal);
  white-space: nowrap;
  font-size: var(--font-size-body);
  font-weight: 500;
  color: var(--color-gray-4);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  position: relative;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.products-section .product-tab:hover {
  transform: translateY(-2px);
  background: rgba(30, 30, 30, 0.7);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  border-color: var(--color-primary-light-1);
  color: var(--color-white);
}

.products-section .product-tab.active {
  background: var(--color-primary);
  color: var(--color-white);
  box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
  border: 1px solid var(--color-primary);
}

.products-section .product-tab .product-name {
  font-size: var(--font-size-small);
  color: var(--color-gray-4);
  font-weight: 500;
  white-space: nowrap;
}

.products-section .product-tab.active .product-name {
  color: var(--color-white);
}

.products-section .product-content {
  margin-top: var(--spacing-md);
}

.products-section .product-item {
  display: none;
}

.products-section .product-item.active {
  display: block;
}

.products-section .product-main {
  position: relative;
  width: 100%;
  display: flex;
  flex-direction: column;
  background: rgba(20, 20, 20, 0.6);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: all var(--transition-normal);
}

.products-section .product-main:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.16);
}

.products-section .product-video {
  position: relative;
  width: 100%;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.products-section .product-video video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.products-section .product-image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(
    135deg,
    var(--color-primary-light) 0%,
    var(--color-primary) 100%
  );
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-size: 64px;
}

.products-section .product-info {
  position: relative;
  background: rgba(30, 30, 30, 0.8);
  padding: var(--spacing-lg) var(--spacing-lg);
  color: var(--color-white);
}

.products-section .product-info-content {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.products-section .product-info p {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-body);
  line-height: 1.7;
  text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.products-section .product-info .btn-text {
  color: var(--color-white);
  font-weight: 500;
  transition: all var(--transition-normal);
  border: 1px solid rgba(255, 255, 255, 0.8);
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-btn);
  display: inline-block;
  align-self: flex-start;
}

.products-section .product-info .btn-text:hover {
  background: rgba(255, 255, 255, 0.2);
  transform: translateX(4px);
}

@media (max-width: 991px) {
  .nav-menu {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .nav-menu.mobile-open {
    display: flex;
    position: fixed;
    top: var(--navbar-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    padding: var(--spacing-md);
    gap: var(--spacing-sm);
    height: 300px;
  }

  .hero-title {
    font-size: 34px;
    white-space: nowrap;
  }

  .hero-subtitle {
    font-size: 18px;
  }

  .footer-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
}

@media (max-width: 767px) {
  .section {
    padding: var(--spacing-xl) 0;
  }

  .advantage-grid {
    grid-template-columns: 1fr;
  }

  .products-grid {
    grid-template-columns: 1fr;
  }

  .culture-grid {
    grid-template-columns: 1fr;
  }

  .lod-timeline::before {
    left: 40px;
  }

  .lod-item::before {
    left: 33px;
  }

  .lod-level {
    width: 80px;
    font-size: var(--font-size-body);
  }

  .coverage-map {
    height: 250px;
  }

  .cases-map {
    min-height: 350px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn {
    width: 100%;
  }
}