/* 全局变量与重置 */
:root {
  --primary: #e94560;
  --secondary: #533483;
  --accent: #0f3460;
  --bg: #ffffff;
  --text: #1a1a2e;
  --card-bg: #f8f9fa;
  --border: #e0e0e0;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --radius: 16px;
  --transition: 0.3s ease;
  --gradient-primary: linear-gradient(135deg, #e94560, #533483);
  --gradient-banner1: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
  --gradient-banner2: linear-gradient(135deg, #0f3460 0%, #533483 50%, #e94560 100%);
  --gradient-banner3: linear-gradient(135deg, #e94560 0%, #533483 50%, #1a1a2e 100%);
  --glass-bg: rgba(255, 255, 255, 0.1);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
}
.dark-mode {
  --bg: #1a1a2e;
  --text: #f0f0f0;
  --card-bg: #16213e;
  --border: #2a2a4a;
  --shadow: 0 4px 20px rgba(0,0,0,0.3);
  --glass-bg: rgba(22, 33, 62, 0.7);
  --glass-border: rgba(255, 255, 255, 0.1);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  transition: background var(--transition), color var(--transition);
  overflow-x: hidden;
}

/* 容器 */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* 通用区块 */
.section { padding: 80px 0; opacity: 0; transform: translateY(30px); transition: opacity 0.6s ease, transform 0.6s ease; }
.section.visible { opacity: 1; transform: translateY(0); }
.section-title {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 50px;
  position: relative;
  color: var(--primary);
  font-weight: 700;
  letter-spacing: -0.5px;
}
.section-title::after {
  content: '';
  display: block;
  width: 80px;
  height: 4px;
  background: var(--gradient-primary);
  margin: 15px auto 0;
  border-radius: 2px;
  transition: width 0.3s ease;
}
.section-title:hover::after { width: 120px; }

/* 按钮 */
.btn-primary {
  display: inline-block;
  padding: 14px 36px;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: 50px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  top: 0; left: -100%;
  width: 100%; height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: left 0.5s ease;
}
.btn-primary:hover::before { left: 100%; }
.btn-primary:hover {
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 25px rgba(233,69,96,0.4);
}

/* 头部 - 毛玻璃效果 */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--glass-bg);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--glass-border);
  transition: background var(--transition), border-color var(--transition);
  box-shadow: 0 2px 20px rgba(0,0,0,0.05);
}
.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo { display: flex; align-items: center; transition: transform 0.3s ease; }
.logo:hover { transform: scale(1.05); }
.main-nav ul { display: flex; list-style: none; gap: 8px; }
.main-nav a {
  padding: 8px 16px;
  text-decoration: none;
  color: var(--text);
  border-radius: 8px;
  font-size: 0.95rem;
  font-weight: 500;
  transition: background var(--transition), color var(--transition), transform 0.2s ease;
  position: relative;
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 2px; left: 50%;
  width: 0; height: 2px;
  background: var(--primary);
  transition: all 0.3s ease;
  transform: translateX(-50%);
}
.main-nav a:hover::after,
.main-nav a.active::after { width: 60%; }
.main-nav a:hover, .main-nav a.active { background: var(--primary); color: #fff; }
.main-nav a:hover::after, .main-nav a.active::after { background: #fff; }
.header-actions { display: flex; gap: 10px; align-items: center; }
.header-actions button {
  background: none;
  border: none;
  color: var(--text);
  cursor: pointer;
  padding: 8px;
  border-radius: 8px;
  transition: background var(--transition), transform 0.2s ease;
}
.header-actions button:hover { background: var(--card-bg); transform: scale(1.1); }
.menu-toggle { display: none; }

/* 搜索栏 */
.search-bar {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px 12px;
  display: none;
  animation: slideDown 0.3s ease;
}
.search-bar.active { display: flex; gap: 10px; }
@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to { opacity: 1; transform: translateY(0); }
}
.search-bar input {
  flex: 1;
  padding: 10px 16px;
  border: 2px solid var(--border);
  border-radius: 8px;
  font-size: 1rem;
  background: var(--card-bg);
  color: var(--text);
  transition: border-color 0.3s ease;
}
.search-bar input:focus { outline: none; border-color: var(--primary); }
.search-bar button {
  padding: 10px 24px;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: 8px;
  cursor: pointer;
  transition: transform 0.2s ease;
}
.search-bar button:hover { transform: scale(1.05); }

/* 英雄区 - 渐变Banner */
.hero { padding-top: 80px; min-height: 80vh; position: relative; overflow: hidden; }
.hero-slider { position: relative; height: 80vh; }
.slide {
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.8s ease, transform 0.8s ease;
  pointer-events: none;
  transform: scale(1.05);
}
.slide.active { opacity: 1; pointer-events: auto; transform: scale(1); }
.slide-bg { position: absolute; inset: 0; }
.slide-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: #fff;
  padding: 40px;
  max-width: 700px;
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius);
  border: 1px solid var(--glass-border);
  box-shadow: var(--glass-shadow);
  animation: fadeInUp 1s ease;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.slide-content h1, .slide-content h2 {
  font-size: 3rem;
  margin-bottom: 20px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.3);
  font-weight: 800;
  letter-spacing: -1px;
}
.slide-content p { font-size: 1.2rem; margin-bottom: 30px; opacity: 0.9; }
.slider-controls {
  position: absolute;
  bottom: 30px;
  left: 0; right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 20px;
  z-index: 3;
}
.slider-controls button {
  background: var(--glass-bg);
  backdrop-filter: blur(5px);
  border: 1px solid var(--glass-border);
  color: #fff;
  font-size: 2rem;
  width: 50px; height: 50px;
  border-radius: 50%;
  cursor: pointer;
  transition: all var(--transition);
}
.slider-controls button:hover { background: rgba(255,255,255,0.3); transform: scale(1.1); }
.dots { display: flex; gap: 10px; }
.dots span {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.4);
  cursor: pointer;
  transition: all var(--transition);
}
.dots span.active { background: #fff; transform: scale(1.2); }
.dots span:hover { background: rgba(255,255,255,0.7); }

/* 面包屑 */
.breadcrumb-section {
  padding: 15px 0;
  background: var(--card-bg);
  border-bottom: 1px solid var(--border);
}
.breadcrumb-section ol {
  list-style: none;
  display: flex;
  gap: 10px;
  font-size: 0.9rem;
}
.breadcrumb-section a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
.breadcrumb-section a:hover { color: var(--secondary); text-decoration: underline; }

/* 关于我们 */
.about-content p {
  margin-bottom: 20px;
  font-size: 1.05rem;
  line-height: 1.8;
  text-align: justify;
}

/* 网格布局 - 圆角卡片 */
.story-grid, .culture-grid, .team-grid, .products-grid, .advantages-grid, .services-grid, .solutions-grid, .industries-grid, .stats-grid, .cases-grid, .partners-grid, .testimonials-grid, .news-grid, .contact-grid, .footer-grid {
  display: grid;
  gap: 30px;
}
.story-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.story-item, .culture-card, .team-card, .product-card, .advantage-card, .service-card, .solution-card, .industry-card, .stat-card, .case-card, .partner-card, .testimonial-card, .news-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.story-item::before, .culture-card::before, .team-card::before, .product-card::before, .advantage-card::before, .service-card::before, .solution-card::before, .industry-card::before, .stat-card::before, .case-card::before, .partner-card::before, .testimonial-card::before, .news-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 4px;
  background: var(--gradient-primary);
  transform: scaleX(0);
  transition: transform 0.3s ease;
  transform-origin: left;
}
.story-item:hover::before, .culture-card:hover::before, .team-card:hover::before, .product-card:hover::before, .advantage-card:hover::before, .service-card:hover::before, .solution-card:hover::before, .industry-card:hover::before, .stat-card:hover::before, .case-card:hover::before, .partner-card:hover::before, .testimonial-card:hover::before, .news-card:hover::before { transform: scaleX(1); }
.story-item:hover, .culture-card:hover, .team-card:hover, .product-card:hover, .advantage-card:hover, .service-card:hover, .solution-card:hover, .industry-card:hover, .stat-card:hover, .case-card:hover, .partner-card:hover, .testimonial-card:hover, .news-card:hover {
  transform: translateY(-5px) scale(1.02);
  box-shadow: 0 12px 40px rgba(0,0,0,0.12);
}
.story-item h3, .culture-card h3, .team-card h3, .product-card h3, .advantage-card h3, .service-card h3, .solution-card h3, .industry-card h3, .news-card h3 {
  margin: 15px 0 10px;
  color: var(--primary);
  font-weight: 600;
}
.stat-card { background: var(--gradient-primary); color: #fff; }
.stat-number { font-size: 2.5rem; font-weight: 700; }
.stat-card p { color: rgba(255,255,255,0.9); }

/* 产品、服务等网格 */
.products-grid { grid-template-columns: repeat(auto-fit, minmax(250px, 1fr)); }
.advantages-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.services-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.solutions-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.industries-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.stats-grid { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.cases-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.partners-grid { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); }
.testimonials-grid { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.news-grid { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.news-card a { color: var(--primary); text-decoration: none; font-weight: 600; transition: color 0.2s ease; }
.news-card a:hover { color: var(--secondary); text-decoration: underline; }

/* FAQ 手风琴 */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { margin-bottom: 10px; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: box-shadow 0.3s ease; }
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question {
  width: 100%;
  padding: 18px 24px;
  background: var(--card-bg);
  border: none;
  text-align: left;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--border); }
.faq-icon { font-size: 1.5rem; transition: transform var(--transition); }
.faq-item.active .faq-icon { transform: rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0 24px; background: var(--bg); }
.faq-item.active .faq-answer { max-height: 300px; padding: 18px 24px; }

/* HowTo 步骤 */
.howto-steps { display: flex; gap: 20px; justify-content: center; flex-wrap: wrap; }
.step {
  display: flex;
  align-items: center;
  gap: 15px;
  background: var(--card-bg);
  padding: 20px 30px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: all var(--transition);
}
.step:hover { transform: translateY(-3px); box-shadow: 0 8px 25px rgba(0,0,0,0.1); }
.step-number {
  width: 40px; height: 40px;
  background: var(--gradient-primary);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.2rem;
  flex-shrink: 0;
}

/* 联系表单 */
.contact-grid { grid-template-columns: 1fr 1fr; }
.contact-info { display: flex; flex-direction: column; gap: 20px; }
.info-item { display: flex; align-items: center; gap: 15px; font-size: 1.05rem; transition: transform 0.2s ease; }
.info-item:hover { transform: translateX(5px); }
.contact-form { display: flex; flex-direction: column; gap: 15px; }
.contact-form input, .contact-form textarea {
  padding: 14px 18px;
  border: 2px solid var(--border);
  border-radius: 10px;
  font-size: 1rem;
  background: var(--card-bg);
  color: var(--text);
  transition: border-color var(--transition), box-shadow 0.3s ease;
}
.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(233,69,96,0.1);
}

/* 页脚 */
.footer {
  background: var(--card-bg);
  border-top: 1px solid var(--border);
  padding: 60px 0 20px;
}
.footer-grid { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.footer-col h3 { margin-bottom: 20px; color: var(--primary); font-weight: 600; }
.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a { color: var(--text); text-decoration: none; transition: color var(--transition); }
.footer-col a:hover { color: var(--primary); padding-left: 5px; }
.footer-bottom { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); text-align: center; font-size: 0.9rem; }
.footer-bottom a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
.footer-bottom a:hover { color: var(--secondary); }

/* 返回顶部 */
#backToTop {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px; height: 50px;
  background: var(--gradient-primary);
  color: #fff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(233,69,96,0.3);
  z-index: 999;
  transition: all var(--transition);
}
#backToTop:hover { transform: scale(1.1) translateY(-3px); box-shadow: 0 6px 20px rgba(233,69,96,0.5); }

/* 响应式 - 平板 */
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: block;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    padding: 20px;
    border-bottom: 1px solid var(--border);
    animation: slideDown 0.3s ease;
  }
  .main-nav.open ul { flex-direction: column; gap: 5px; }
  .menu-toggle { display: block; }
  .slide-content h1, .slide-content h2 { font-size: 2rem; }
  .section-title { font-size: 1.8rem; }
  .contact-grid { grid-template-columns: 1fr; }
  .howto-steps { flex-direction: column; align-items: stretch; }
  .section { padding: 60px 0; }
}

/* 响应式 - 手机 */
@media (max-width: 480px) {
  .hero { min-height: 60vh; }
  .hero-slider { height: 60vh; }
  .slide-content { padding: 20px; }
  .slide-content h1, .slide-content h2 { font-size: 1.6rem; }
  .slide-content p { font-size: 1rem; }
  .section-title { font-size: 1.5rem; }
  .section { padding: 40px 0; }
  .btn-primary { padding: 12px 28px; font-size: 1rem; }
  .header-inner { padding: 10px 15px; }
  .container { padding: 0 15px; }
}

/* 滚动动画增强 */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
.section.visible .story-item,
.section.visible .culture-card,
.section.visible .team-card,
.section.visible .product-card,
.section.visible .advantage-card,
.section.visible .service-card,
.section.visible .solution-card,
.section.visible .industry-card,
.section.visible .stat-card,
.section.visible .case-card,
.section.visible .partner-card,
.section.visible .testimonial-card,
.section.visible .news-card {
  animation: fadeIn 0.6s ease forwards;
}
.section.visible .story-item:nth-child(1),
.section.visible .culture-card:nth-child(1),
.section.visible .team-card:nth-child(1),
.section.visible .product-card:nth-child(1),
.section.visible .advantage-card:nth-child(1),
.section.visible .service-card:nth-child(1),
.section.visible .solution-card:nth-child(1),
.section.visible .industry-card:nth-child(1),
.section.visible .stat-card:nth-child(1),
.section.visible .case-card:nth-child(1),
.section.visible .partner-card:nth-child(1),
.section.visible .testimonial-card:nth-child(1),
.section.visible .news-card:nth-child(1) { animation-delay: 0.1s; }
.section.visible .story-item:nth-child(2),
.section.visible .culture-card:nth-child(2),
.section.visible .team-card:nth-child(2),
.section.visible .product-card:nth-child(2),
.section.visible .advantage-card:nth-child(2),
.section.visible .service-card:nth-child(2),
.section.visible .solution-card:nth-child(2),
.section.visible .industry-card:nth-child(2),
.section.visible .stat-card:nth-child(2),
.section.visible .case-card:nth-child(2),
.section.visible .partner-card:nth-child(2),
.section.visible .testimonial-card:nth-child(2),
.section.visible .news-card:nth-child(2) { animation-delay: 0.2s; }
.section.visible .story-item:nth-child(3),
.section.visible .culture-card:nth-child(3),
.section.visible .team-card:nth-child(3),
.section.visible .product-card:nth-child(3),
.section.visible .advantage-card:nth-child(3),
.section.visible .service-card:nth-child(3),
.section.visible .solution-card:nth-child(3),
.section.visible .industry-card:nth-child(3),
.section.visible .stat-card:nth-child(3),
.section.visible .case-card:nth-child(3),
.section.visible .partner-card:nth-child(3),
.section.visible .testimonial-card:nth-child(3),
.section.visible .news-card:nth-child(3) { animation-delay: 0.3s; }
.section.visible .story-item:nth-child(4),
.section.visible .team-card:nth-child(4) { animation-delay: 0.4s; }