/* ========== 高端黑色科技风主题 ========== */
:root {
  --dark-primary: #0a0a0f;
  --dark-secondary: #12121a;
  --dark-tertiary: #1a1a25;
  --dark-card: #151520;
  --accent-purple: #8B5CF6;
  --accent-cyan: #06B6D4;
  --accent-blue: #3B82F6;
  --text-primary: #FFFFFF;
  --text-secondary: #A1A1AA;
  --text-muted: #71717A;
  --glow-purple: rgba(139, 92, 246, 0.4);
  --glow-cyan: rgba(6, 182, 212, 0.4);
  --border-dark: rgba(255, 255, 255, 0.08);
  --transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

.container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 40px;
}

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

/* ========== 背景光晕效果 ========== */
body::before {
  content: '';
  position: fixed;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: 
    radial-gradient(ellipse at 20% 20%, var(--glow-purple) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 80%, var(--glow-cyan) 0%, transparent 50%);
  opacity: 0.15;
  z-index: -1;
  animation: floatBg 20s ease-in-out infinite;
}

@keyframes floatBg {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  50% { transform: translate(-5%, 5%) rotate(5deg); }
}

/* ========== 头部导航 ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-dark);
  z-index: 1000;
  padding: 0 40px;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 15px;
}

.logo-img {
  height: 50px;
  width: auto;
  object-fit: contain;
}

.logo-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 26px;
  font-weight: bold;
  box-shadow: 0 0 30px var(--glow-purple);
  position: relative;
  overflow: hidden;
}

.logo-icon::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(45deg, transparent, rgba(255,255,255,0.2), transparent);
  transform: translateX(-100%);
  animation: shine 3s ease-in-out infinite;
}

@keyframes shine {
  0%, 100% { transform: translateX(-100%); }
  50% { transform: translateX(100%); }
}

.logo-text {
  display: flex;
  flex-direction: column;
  max-width: 280px;
}

.logo-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  background: linear-gradient(90deg, var(--text-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.logo-en {
  font-size: 9px;
  color: var(--text-muted);
  letter-spacing: 1px;
  text-transform: uppercase;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.nav {
  display: flex;
  gap: 40px;
}

.nav-link {
  position: relative;
  font-size: 15px;
  color: var(--text-secondary);
  padding: 10px 0;
  transition: var(--transition);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  transition: var(--transition);
  transform: translateX(-50%);
  box-shadow: 0 0 10px var(--glow-purple);
}

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

.mobile-menu-btn {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.mobile-menu-btn span {
  width: 28px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 80px;
  left: 0;
  right: 0;
  background: rgba(10, 10, 15, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-dark);
  padding: 20px 40px;
  z-index: 999;
}

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

.mobile-menu a {
  display: block;
  padding: 15px 0;
  border-bottom: 1px solid var(--border-dark);
  color: var(--text-secondary);
  font-size: 16px;
}

@media (max-width: 992px) {
  .nav { display: none; }
  .mobile-menu-btn { display: flex; }
  .header { padding: 0 20px; }
  .container { padding: 0 20px; }
}

/* ========== Banner轮播 ========== */
.banner {
  position: relative;
  height: 100vh;
  min-height: 700px;
  overflow: hidden;
  margin-top: 80px;
}

.banner-slider {
  position: relative;
  height: 100%;
}

.banner-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 1s ease;
}

.banner-slide.active {
  opacity: 1;
}

.banner-slide-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
}

.banner-slide-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(10, 10, 15, 0.9) 0%, rgba(30, 30, 50, 0.7) 50%, rgba(10, 10, 15, 0.85) 100%);
}

.banner-slide-content {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 40px;
}

.banner-slide-content h2 {
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--text-primary), var(--accent-purple), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: gradientFlow 5s ease infinite;
  background-size: 200% 200%;
}

@keyframes gradientFlow {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.banner-slide-content p {
  font-size: 20px;
  max-width: 700px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.banner-dots {
  position: absolute;
  bottom: 50px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 15px;
}

.banner-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.3);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
}

.banner-dot::before {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 1px solid transparent;
  transition: var(--transition);
}

.banner-dot.active {
  background: var(--accent-purple);
  box-shadow: 0 0 20px var(--glow-purple);
}

.banner-dot.active::before {
  border-color: var(--accent-purple);
}

.banner-arrows {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 30px;
  pointer-events: none;
}

.banner-arrow {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-dark);
  color: var(--text-primary);
  font-size: 24px;
  cursor: pointer;
  pointer-events: auto;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner-arrow:hover {
  background: var(--accent-purple);
  border-color: var(--accent-purple);
  box-shadow: 0 0 30px var(--glow-purple);
}

@media (max-width: 768px) {
  .banner {
    min-height: 500px;
  }
  .banner-slide-content h2 {
    font-size: 32px;
  }
  .banner-slide-content p {
    font-size: 16px;
  }
  .banner-arrow {
    width: 45px;
    height: 45px;
    font-size: 18px;
  }
}

/* ========== 统计数据 ========== */
.stats {
  background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.05), transparent);
  padding: 100px 0;
  position: relative;
}

.stats::before {
  content: '';
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, transparent, var(--accent-purple));
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
}

.stat-item {
  text-align: center;
  padding: 40px;
  background: var(--dark-card);
  border-radius: 20px;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  opacity: 0;
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-10px);
  border-color: rgba(139, 92, 246, 0.3);
  box-shadow: 0 20px 60px rgba(139, 92, 246, 0.2);
}

.stat-item:hover::before {
  opacity: 1;
}

.stat-number {
  font-size: 56px;
  font-weight: 800;
  background: linear-gradient(90deg, var(--text-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  margin-bottom: 10px;
  line-height: 1;
}

.stat-label {
  font-size: 16px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 3px;
}

@media (max-width: 992px) {
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
  }
  .stat-number {
    font-size: 42px;
  }
}

@media (max-width: 480px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== 通用区块 ========== */
.section {
  padding: 120px 0;
  position: relative;
}

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

.section-title {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 15px;
  position: relative;
  display: inline-block;
  background: linear-gradient(90deg, var(--text-primary), var(--accent-purple));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-title::after {
  content: '';
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 4px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 2px;
  box-shadow: 0 0 20px var(--glow-purple);
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 5px;
  margin-top: 40px;
}

/* ========== 产品中心 ========== */
.products-section {
  background: linear-gradient(180deg, transparent, rgba(6, 182, 212, 0.03), transparent);
}

.category-tabs {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 15px;
  margin-bottom: 60px;
}

.category-tab {
  padding: 14px 30px;
  border: 1px solid var(--border-dark);
  background: var(--dark-card);
  border-radius: 30px;
  cursor: pointer;
  transition: var(--transition);
  font-size: 14px;
  color: var(--text-secondary);
}

.category-tab:hover,
.category-tab.active {
  border-color: var(--accent-purple);
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.1));
  color: var(--text-primary);
  box-shadow: 0 0 30px rgba(139, 92, 246, 0.2);
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.product-card {
  background: var(--dark-card);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
  cursor: pointer;
  position: relative;
}

.product-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--glow-purple), var(--glow-cyan));
  opacity: 0;
  transition: var(--transition);
  z-index: 0;
}

.product-card:hover {
  transform: translateY(-10px) scale(1.02);
  border-color: rgba(139, 92, 246, 0.5);
  box-shadow: 0 30px 80px rgba(139, 92, 246, 0.3);
}

.product-card:hover::before {
  opacity: 0.1;
}

.product-image {
  height: 200px;
  background: linear-gradient(135deg, #1a1a25, #252535);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.product-image-placeholder {
  font-size: 64px;
  color: var(--accent-purple);
  opacity: 0.5;
  position: relative;
  z-index: 1;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: relative;
  z-index: 1;
}

.product-category {
  position: absolute;
  top: 15px;
  right: 15px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  color: white;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
  z-index: 2;
  box-shadow: 0 4px 15px rgba(139, 92, 246, 0.4);
}

.product-info {
  padding: 25px;
  position: relative;
  z-index: 1;
}

.product-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
  line-height: 1.4;
}

.product-model {
  font-size: 14px;
  color: var(--accent-cyan);
  margin-bottom: 12px;
  font-family: monospace;
}

.product-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 1200px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 992px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .products-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== 产品详情弹窗 ========== */
.modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 2000;
}

.modal.show {
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
}

.modal-content {
  position: relative;
  background: var(--dark-secondary);
  border-radius: 24px;
  max-width: 95%;
  max-height: 90vh;
  overflow: auto;
  z-index: 1;
  border: 1px solid var(--border-dark);
  box-shadow: 0 40px 100px rgba(0, 0, 0, 0.5);
}

.product-modal-content {
  width: 95vw;
  height: 95vh;
  max-width: 1400px;
  max-height: 95vh;
  overflow-y: auto;
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 45px;
  height: 45px;
  border: 1px solid var(--border-dark);
  background: var(--dark-card);
  border-radius: 50%;
  font-size: 28px;
  color: var(--text-secondary);
  cursor: pointer;
  transition: var(--transition);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.modal-close:hover {
  background: var(--accent-purple);
  border-color: var(--accent-purple);
  color: white;
  transform: rotate(90deg);
}

.product-detail {
  padding: 50px;
  max-height: calc(95vh - 40px);
  overflow-y: auto;
}

.product-detail-header {
  display: flex;
  gap: 80px;
  margin-bottom: 40px;
}

.product-detail-image {
  width: 600px;
  height: 450px;
  background: linear-gradient(135deg, #1a1a25, #252535);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  overflow: hidden;
  border: 1px solid var(--border-dark);
}

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

.product-detail-image-placeholder {
  font-size: 80px;
  color: var(--accent-purple);
  opacity: 0.4;
}

.product-detail-info {
  flex: 1;
}

.product-detail-info h3 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 10px;
  background: linear-gradient(90deg, var(--text-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.product-detail-info .model {
  color: var(--accent-cyan);
  font-size: 18px;
  font-family: monospace;
  margin-bottom: 20px;
}

.product-detail-info .category {
  display: inline-block;
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.1));
  color: var(--accent-purple);
  padding: 8px 20px;
  border-radius: 25px;
  font-size: 14px;
  margin-bottom: 25px;
  border: 1px solid rgba(139, 92, 246, 0.3);
}

.product-detail-info .description {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 15px;
}

.product-detail-section {
  margin-bottom: 35px;
  padding: 30px;
  background: var(--dark-card);
  border-radius: 16px;
  border: 1px solid var(--border-dark);
}

.product-detail-section h4 {
  font-size: 18px;
  color: var(--text-primary);
  margin-bottom: 15px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.product-detail-section h4::before {
  content: '';
  width: 4px;
  height: 20px;
  background: linear-gradient(180deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 2px;
}

.product-detail-section p,
.product-detail-section .content {
  color: var(--text-secondary);
  line-height: 1.9;
}

.product-detail-section p {
  white-space: normal;
}

.product-detail-section .content {
  white-space: normal;
}

@media (max-width: 768px) {
  .product-modal-content {
    width: 95%;
  }
  .product-detail {
    padding: 30px;
  }
  .product-detail-header {
    flex-direction: column;
  }
  .product-detail-image {
    width: 100%;
    height: 200px;
  }
}

/* ========== 新闻动态 ========== */
.news-section {
  background: linear-gradient(180deg, transparent, rgba(139, 92, 246, 0.03), transparent);
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 30px;
}

.news-card {
  background: var(--dark-card);
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
  cursor: pointer;
}

.news-card:hover {
  transform: translateY(-10px);
  border-color: rgba(6, 182, 212, 0.5);
  box-shadow: 0 30px 80px rgba(6, 182, 212, 0.2);
}

.news-image {
  height: 180px;
  background: linear-gradient(135deg, #1a1a25, #252535);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

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

.news-card:hover .news-image img {
  transform: scale(1.1);
}

.news-image-placeholder {
  font-size: 60px;
  color: var(--accent-cyan);
  opacity: 0.4;
}

.news-content {
  padding: 25px;
}

.news-date {
  font-size: 12px;
  color: var(--text-muted);
  margin-bottom: 12px;
}

.news-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 12px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-summary {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

@media (max-width: 1200px) {
  .news-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* ========== 新闻详情弹窗 ========== */
.news-modal-content {
  width: 95vw;
  height: 95vh;
  max-width: 1400px;
  max-height: 95vh;
  overflow-y: auto;
}

.news-detail {
  padding: 50px;
}

.news-detail-header {
  margin-bottom: 40px;
}

.news-detail-cover {
  width: 100%;
  height: 500px;
  margin-bottom: 40px;
  border-radius: 16px;
  overflow: hidden;
  border: 1px solid var(--border-dark);
}

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

.news-detail-meta {
  display: flex;
  gap: 20px;
  margin-bottom: 15px;
}

.news-detail-date {
  color: var(--accent-cyan);
  font-size: 14px;
}

.news-detail-category {
  background: linear-gradient(135deg, rgba(139, 92, 246, 0.2), rgba(6, 182, 212, 0.1));
  color: var(--accent-purple);
  padding: 4px 16px;
  border-radius: 20px;
  font-size: 13px;
}

.news-detail-title {
  font-size: 36px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin-bottom: 20px;
  background: linear-gradient(90deg, var(--text-primary), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.news-detail-summary {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.8;
  padding-bottom: 30px;
  border-bottom: 1px solid var(--border-dark);
}

.news-detail-body {
  margin-top: 30px;
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 2;
}

.news-detail-body p {
  margin-bottom: 20px;
}

.news-detail-body img {
  max-width: 100%;
  height: auto;
  border-radius: 12px;
  margin: 20px 0;
}

@media (max-width: 768px) {
  .news-modal-content {
    width: 95%;
    max-height: 85vh;
  }
  .news-detail {
    padding: 25px;
  }
  .news-detail-cover {
    height: 200px;
  }
  .news-detail-title {
    font-size: 24px;
  }
  .news-detail-summary {
    font-size: 15px;
  }
}

/* ========== 关于我们 ========== */
.about-section {
  background: linear-gradient(180deg, transparent, rgba(10, 10, 15, 1), var(--dark-primary));
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 80px;
}

.about-text .section-title {
  text-align: left;
  margin-bottom: 30px;
}

.about-text .section-title::after {
  left: 0;
  transform: none;
}

.about-description {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 2;
}

.about-image {
  position: relative;
}

.about-image-placeholder {
  width: 100%;
  height: 400px;
  background: linear-gradient(135deg, var(--dark-card), var(--dark-tertiary));
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-dark);
  position: relative;
  overflow: hidden;
}

.about-image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--glow-purple), var(--glow-cyan));
  opacity: 0.1;
}

.about-image-placeholder span {
  font-size: 48px;
  font-weight: 800;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  position: relative;
  z-index: 1;
}

.brands-section {
  margin-top: 80px;
}

.brands-title {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: center;
  margin-bottom: 40px;
}

.brands-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 30px;
}

.brand-item {
  background: var(--dark-card);
  border-radius: 16px;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
  min-height: 100px;
  overflow: hidden;
}

.brand-item:hover {
  border-color: rgba(139, 92, 246, 0.5);
  transform: translateY(-5px);
  box-shadow: 0 15px 40px rgba(139, 92, 246, 0.2);
}

.brand-item img {
  max-width: 90%;
  max-height: 70px;
  object-fit: contain;
  opacity: 0.9;
  transition: var(--transition);
  filter: grayscale(30%) brightness(1.1);
}

.brand-item:hover img {
  opacity: 1;
  filter: grayscale(0%) brightness(1.2);
}

.brand-item span {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
  text-align: center;
}

@media (max-width: 992px) {
  .about-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .about-text .section-title {
    text-align: center;
  }
  .about-text .section-title::after {
    left: 50%;
    transform: translateX(-50%);
  }
  .brands-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (max-width: 480px) {
  .brands-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========== 资料下载 ========== */
.downloads-section {
  background: linear-gradient(180deg, var(--dark-primary), rgba(6, 182, 212, 0.03), transparent);
}

.downloads-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.download-card {
  background: var(--dark-card);
  border-radius: 16px;
  padding: 30px;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 20px;
}

.download-card:hover {
  border-color: rgba(6, 182, 212, 0.5);
  transform: translateY(-5px);
  box-shadow: 0 20px 50px rgba(6, 182, 212, 0.15);
}

.download-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, rgba(6, 182, 212, 0.2), rgba(59, 130, 246, 0.1));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  flex-shrink: 0;
}

.download-info {
  flex: 1;
  min-width: 0;
}

.download-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.download-desc {
  font-size: 13px;
  color: var(--text-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.download-size {
  font-size: 12px;
  color: var(--accent-cyan);
  margin-top: 8px;
}

@media (max-width: 992px) {
  .downloads-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 480px) {
  .downloads-grid {
    grid-template-columns: 1fr;
  }
}

/* ========== 联系我们 ========== */
.contact-section {
  background: linear-gradient(180deg, transparent, var(--dark-primary));
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 25px;
  background: var(--dark-card);
  border-radius: 16px;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
}

.contact-item:hover {
  border-color: rgba(139, 92, 246, 0.3);
  transform: translateX(10px);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.contact-text h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

.contact-form {
  background: var(--dark-card);
  border-radius: 24px;
  padding: 40px;
  border: 1px solid var(--border-dark);
}

.contact-form h3 {
  font-size: 24px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 30px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 16px 20px;
  background: var(--dark-secondary);
  border: 1px solid var(--border-dark);
  border-radius: 12px;
  font-size: 15px;
  color: var(--text-primary);
  margin-bottom: 20px;
  transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: var(--accent-purple);
  box-shadow: 0 0 20px rgba(139, 92, 246, 0.2);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
  color: var(--text-muted);
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  color: white;
  border: none;
  padding: 16px 40px;
  border-radius: 12px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 10px 30px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 15px 40px rgba(139, 92, 246, 0.4);
}

@media (max-width: 992px) {
  .contact-content {
    grid-template-columns: 1fr;
    gap: 40px;
  }
}

/* ========== 页脚 ========== */
.footer {
  background: var(--dark-secondary);
  border-top: 1px solid var(--border-dark);
  padding: 60px 0 30px;
}

.footer-content {
  display: grid;
  grid-template-columns: 2fr repeat(3, 1fr);
  gap: 60px;
  margin-bottom: 50px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 25px;
  position: relative;
  padding-bottom: 15px;
}

.footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 30px;
  height: 3px;
  background: linear-gradient(90deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 2px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}

.footer-logo-img {
  height: 40px;
  width: auto;
  object-fit: contain;
}

.footer-logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: bold;
  flex-shrink: 0;
}

.footer-logo-text {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.3;
}

.footer-desc {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
}

.footer-col ul li {
  margin-bottom: 12px;
}

.footer-col ul li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: var(--accent-purple);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 30px;
  border-top: 1px solid var(--border-dark);
}

.footer-bottom p {
  font-size: 13px;
  color: var(--text-muted);
}

@media (max-width: 992px) {
  .footer-content {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }
}

@media (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
}

/* ========== 滚动条样式 ========== */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--dark-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--dark-tertiary);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent-purple);
}

/* ========== 微信公众号二维码 ========== */
.wechat-qr {
  margin-top: 25px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
}

.wechat-qr img {
  width: 100px;
  height: 100px;
  border-radius: 8px;
  border: 2px solid rgba(255, 255, 255, 0.1);
  transition: transform 0.3s ease;
  object-fit: cover;
  background: white;
}

.wechat-qr img:hover {
  transform: scale(1.1);
}

.wechat-qr span {
  display: block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--text-muted);
}

/* ========== 下载详情弹窗 ========== */
.download-modal-content {
  max-width: 1000px;
  width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
}

.download-modal-title {
  font-size: 24px;
  color: var(--text-primary);
  margin-bottom: 30px;
  padding-bottom: 20px;
  padding-right: 50px;
  border-bottom: 1px solid var(--border-dark);
  text-align: left;
}

.download-modal-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.download-modal-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 25px;
  background: var(--dark-card);
  border-radius: 12px;
  border: 1px solid var(--border-dark);
  transition: var(--transition);
}

.download-modal-item:hover {
  border-color: rgba(6, 182, 212, 0.5);
  transform: translateX(5px);
}

.download-modal-item-info {
  flex: 1;
  min-width: 0;
}

.download-modal-item-info h4 {
  font-size: 16px;
  color: var(--text-primary);
  margin-bottom: 8px;
}

.download-modal-item-info p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.download-modal-size {
  display: inline-block;
  margin-top: 8px;
  font-size: 12px;
  color: var(--accent-cyan);
}

.download-modal-btn {
  flex-shrink: 0;
  margin-left: 20px;
  padding: 10px 20px;
  background: linear-gradient(135deg, var(--accent-purple), var(--accent-cyan));
  color: white;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
}

.download-modal-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 5px 20px rgba(139, 92, 246, 0.4);
}

/* ========== 富文本样式 ========== */
.rich-text {
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 15px;
}

.rich-text p {
  margin-bottom: 12px;
}

.rich-text h1, .rich-text h2, .rich-text h3, .rich-text h4, .rich-text h5, .rich-text h6 {
  color: var(--text-primary);
  margin-top: 20px;
  margin-bottom: 12px;
  font-weight: 600;
}

.rich-text h1 { font-size: 28px; }
.rich-text h2 { font-size: 24px; }
.rich-text h3 { font-size: 20px; }
.rich-text h4 { font-size: 18px; }
.rich-text h5 { font-size: 16px; }
.rich-text h6 { font-size: 14px; }

.rich-text ul, .rich-text ol {
  margin: 12px 0;
  padding-left: 25px;
}

.rich-text li {
  margin-bottom: 8px;
  list-style: disc;
}

.rich-text ol li {
  list-style: decimal;
}

.rich-text strong {
  color: var(--accent-cyan);
  font-weight: 600;
}

.rich-text em {
  font-style: italic;
}

.rich-text u {
  text-decoration: underline;
}

.rich-text s, .rich-text strike {
  text-decoration: line-through;
}

.rich-text a {
  color: var(--accent-purple);
  text-decoration: underline;
}

.rich-text a:hover {
  color: var(--accent-cyan);
}

.rich-text img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 15px 0;
}

.rich-text blockquote {
  border-left: 4px solid var(--accent-purple);
  padding-left: 20px;
  margin: 15px 0;
  color: var(--text-muted);
  font-style: italic;
}

.rich-text code {
  background: var(--dark-tertiary);
  padding: 2px 6px;
  border-radius: 4px;
  font-family: 'Courier New', monospace;
  font-size: 14px;
  color: var(--accent-cyan);
}

.rich-text pre {
  background: var(--dark-tertiary);
  padding: 15px;
  border-radius: 8px;
  overflow-x: auto;
  margin: 15px 0;
}

.rich-text pre code {
  background: none;
  padding: 0;
}

.rich-text hr {
  border: none;
  border-top: 1px solid var(--border-dark);
  margin: 20px 0;
}

.rich-text table {
  width: 100%;
  border-collapse: collapse;
  margin: 15px 0;
}

.rich-text table td, .rich-text table th {
  border: 1px solid var(--border-dark);
  padding: 10px;
  text-align: left;
}

.rich-text table th {
  background: var(--dark-tertiary);
  color: var(--accent-cyan);
}

@media (max-width: 768px) {
  .download-modal-content {
    max-width: 95%;
  }
  .download-modal-item {
    flex-direction: column;
    align-items: flex-start;
  }
  .download-modal-btn {
    margin-left: 0;
    margin-top: 15px;
    width: 100%;
    text-align: center;
  }
}

/* ========== 更多按钮样式 ========== */
.btn-more {
  display: inline-block;
  padding: 12px 32px;
  border: 1px solid var(--accent-cyan);
  border-radius: 30px;
  color: var(--accent-cyan);
  font-size: 14px;
  font-weight: 500;
  transition: var(--transition);
  background: transparent;
}

.btn-more:hover {
  background: var(--accent-cyan);
  color: var(--dark-primary);
  box-shadow: 0 0 20px var(--glow-cyan);
  transform: translateY(-2px);
}

/* ========== 独立页面通用样式 ========== */
.page-header {
  padding: 120px 0 60px;
  background: linear-gradient(135deg, var(--dark-secondary) 0%, var(--dark-primary) 100%);
  text-align: center;
}

.page-header h1 {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 15px;
  background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.page-header p {
  font-size: 18px;
  color: var(--text-secondary);
}

.list-page-content {
  padding: 60px 0;
}

.list-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 30px;
}

.list-pagination {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  margin-top: 50px;
  padding-top: 30px;
  border-top: 1px solid var(--border-dark);
}

.list-pagination-btn {
  padding: 10px 20px;
  border: 1px solid var(--border-dark);
  border-radius: 8px;
  background: var(--dark-card);
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.list-pagination-btn:hover:not(:disabled) {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.list-pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.list-pagination-btn.active {
  background: var(--accent-cyan);
  color: var(--dark-primary);
  border-color: var(--accent-cyan);
}

.list-pagination-info {
  color: var(--text-muted);
  font-size: 14px;
  margin: 0 20px;
}

.category-filter {
  display: flex;
  gap: 15px;
  flex-wrap: wrap;
  justify-content: center;
  margin-bottom: 40px;
}

.category-filter-btn {
  padding: 10px 24px;
  border: 1px solid var(--border-dark);
  border-radius: 25px;
  background: transparent;
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: var(--transition);
}

.category-filter-btn:hover {
  border-color: var(--accent-cyan);
  color: var(--accent-cyan);
}

.category-filter-btn.active {
  background: var(--accent-cyan);
  color: var(--dark-primary);
  border-color: var(--accent-cyan);
}

/* ========== Toast提示 ========== */
.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.toast {
  padding: 15px 30px;
  background: rgba(30, 41, 59, 0.95);
  color: #fff;
  border-radius: 8px;
  font-size: 15px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  animation: toastIn 0.3s ease;
}

.toast.success {
  background: linear-gradient(135deg, #059669, #10b981);
}

.toast.error {
  background: linear-gradient(135deg, #dc2626, #ef4444);
}

.toast.info {
  background: linear-gradient(135deg, #2563eb, #3b82f6);
}

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

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

/* ========== 移动端补充适配 ========== */
@media (max-width: 768px) {
  .page-header {
    padding: 100px 0 40px;
  }
  .page-header h1 {
    font-size: 32px;
  }
  .page-header p {
    font-size: 14px;
  }
  .list-page-content {
    padding: 40px 0;
  }
  .list-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .category-filter {
    gap: 10px;
  }
  .category-filter-btn {
    padding: 8px 16px;
    font-size: 13px;
  }
  .list-pagination {
    flex-wrap: wrap;
    gap: 8px;
  }
  .list-pagination-btn {
    padding: 8px 16px;
    font-size: 13px;
  }
  .list-pagination-info {
    width: 100%;
    text-align: center;
    margin: 10px 0 0;
  }
}

@media (max-width: 480px) {
  .page-header h1 {
    font-size: 26px;
  }
  .logo-text .logo-name {
    font-size: 14px;
  }
  .logo-text .logo-en {
    font-size: 10px;
  }
  .product-modal-content,
  .news-modal-content {
    width: 100vw;
    height: 100vh;
    max-width: 100vw;
    max-height: 100vh;
    border-radius: 0;
  }
  .modal-close {
    top: 10px;
    right: 10px;
    width: 36px;
    height: 36px;
  }
}