/* ===== 全局重置与变量 ===== */
:root {
  --color-primary: #e31b23;
  --color-primary-dark: #b8151c;
  --color-primary-light: #ff4a50;
  --color-secondary: #1a1a2e;
  --color-accent: #d4a017;
  --color-bg: #f8f9fa;
  --color-bg-alt: #ffffff;
  --color-text: #1a1a2e;
  --color-text-light: #555;
  --color-text-muted: #888;
  --color-border: rgba(0,0,0,0.08);
  --color-glass: rgba(255,255,255,0.7);
  --color-glass-border: rgba(255,255,255,0.3);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.12);
  --shadow-glow: 0 0 30px rgba(227,27,35,0.15);
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --max-width: 1200px;
  --header-height: 72px;
}

/* 暗色模式变量 */
body.dark-mode {
  --color-bg: #0f0f1a;
  --color-bg-alt: #1a1a2e;
  --color-text: #e8e8f0;
  --color-text-light: #b0b0c0;
  --color-text-muted: #707080;
  --color-border: rgba(255,255,255,0.08);
  --color-glass: rgba(26,26,46,0.8);
  --color-glass-border: rgba(255,255,255,0.1);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 20px rgba(0,0,0,0.4);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 30px rgba(227,27,35,0.25);
}

/* ===== 基础样式 ===== */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  overflow-x: hidden;
  transition: background var(--transition), color var(--transition);
  min-height: 100vh;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover, a:focus {
  color: var(--color-primary-dark);
}

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

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  transition: all var(--transition);
}

button:focus-visible, a:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2rem, 5vw, 3.5rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.5rem); margin-bottom: 1.5rem; }
h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }

section {
  padding: 4rem 1.5rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

@media (min-width: 768px) {
  section { padding: 5rem 2rem; }
}

/* ===== 渐变Banner背景 ===== */
#hero {
  background: linear-gradient(135deg, #1a1a2e 0%, #2d1b3d 30%, #4a1a2e 60%, #1a1a2e 100%);
  color: #fff;
  padding: 0;
  max-width: 100%;
  position: relative;
  overflow: hidden;
}

#hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 30% 50%, rgba(227,27,35,0.15) 0%, transparent 60%),
              radial-gradient(circle at 70% 30%, rgba(212,160,23,0.1) 0%, transparent 50%);
  animation: heroGlow 15s ease-in-out infinite alternate;
  pointer-events: none;
}

@keyframes heroGlow {
  0% { transform: translate(0, 0) rotate(0deg); }
  100% { transform: translate(5%, 3%) rotate(3deg); }
}

/* ===== 圆角卡片通用 ===== */
.card, .about-card, .product-card, .service-card, .team-card, .insight-card, 
.case-card, .knowledge-card, .feature-card, .solution-card, .testimonials-grid blockquote {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.card:hover, .about-card:hover, .product-card:hover, .service-card:hover, 
.team-card:hover, .insight-card:hover, .case-card:hover, .knowledge-card:hover,
.feature-card:hover, .solution-card:hover, .testimonials-grid blockquote:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  border-color: var(--color-primary);
}

/* ===== 毛玻璃效果 ===== */
.glass, .nav-brand, .nav-actions button, .cta-button, .slider-prev, .slider-next,
#back-to-top, .faq-item, .contact-form form, #search-bar {
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  background: var(--color-glass);
  border: 1px solid var(--color-glass-border);
}

/* ===== 响应式网格系统 ===== */
.about-grid, .products-grid, .services-grid, .team-grid, .insights-grid,
.case-grid, .knowledge-grid, .features-grid, .solutions-grid, .testimonials-grid,
.contact-grid {
  display: grid;
  gap: 1.5rem;
}

.about-grid, .services-grid, .features-grid, .solutions-grid {
  grid-template-columns: 1fr;
}

.products-grid, .team-grid, .insights-grid, .case-grid, .knowledge-grid {
  grid-template-columns: 1fr;
}

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

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

@media (min-width: 640px) {
  .about-grid, .services-grid, .features-grid, .solutions-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .products-grid, .team-grid, .insights-grid, .case-grid, .knowledge-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .about-grid, .services-grid, .features-grid, .solutions-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .products-grid, .team-grid, .insights-grid, .case-grid, .knowledge-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .testimonials-grid {
    grid-template-columns: repeat(3, 1fr);
  }
  .contact-grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* ===== Header & Navigation ===== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--color-glass);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition);
}

#main-navigation {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
  height: var(--header-height);
}

.nav-brand a {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-text);
}

.brand-text {
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: none;
  gap: 0.25rem;
}

.nav-links a {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  color: var(--color-text-light);
  font-weight: 500;
  font-size: 0.925rem;
  transition: all var(--transition);
}

.nav-links a:hover, .nav-links a:focus {
  color: var(--color-primary);
  background: rgba(227,27,35,0.08);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-actions button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
  transition: all var(--transition);
}

.nav-actions button:hover {
  background: rgba(227,27,35,0.12);
  color: var(--color-primary);
  transform: scale(1.05);
}

#mobile-menu-toggle {
  display: flex;
}

@media (min-width: 768px) {
  .nav-links { display: flex; }
  #mobile-menu-toggle { display: none; }
}

/* ===== 移动端菜单 ===== */
#mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--color-bg);
  z-index: 999;
  padding: 2rem 1.5rem;
  overflow-y: auto;
  animation: slideIn 0.3s ease;
}

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

#mobile-menu ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

#mobile-menu a {
  display: block;
  padding: 1rem 1.25rem;
  font-size: 1.125rem;
  font-weight: 500;
  border-radius: var(--radius-md);
  color: var(--color-text);
  transition: all var(--transition);
}

#mobile-menu a:hover {
  background: rgba(227,27,35,0.08);
  color: var(--color-primary);
  padding-left: 1.75rem;
}

/* ===== 搜索栏 ===== */
#search-bar {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--color-border);
  transition: all var(--transition);
}

#search-bar form {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

#search-bar input {
  flex: 1;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg-alt);
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color var(--transition);
}

#search-bar input:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(227,27,35,0.15);
}

#search-bar button {
  padding: 0.75rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-weight: 600;
  transition: all var(--transition);
}

#search-bar button:hover {
  background: var(--color-primary-dark);
  transform: scale(1.02);
}

/* ===== Hero / 轮播 ===== */
.hero-slider {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  opacity: 0;
  transform: scale(0.95);
  transition: all 0.6s ease;
  pointer-events: none;
}

.slide.active {
  opacity: 1;
  transform: scale(1);
  pointer-events: auto;
}

.slide-content {
  text-align: center;
  max-width: 700px;
  z-index: 1;
}

.slide-content h1, .slide-content h2 {
  font-size: clamp(2rem, 6vw, 4rem);
  margin-bottom: 1rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.slide-content p {
  font-size: 1.125rem;
  margin-bottom: 2rem;
  opacity: 0.9;
  line-height: 1.7;
}

.cta-button {
  display: inline-block;
  padding: 0.875rem 2.5rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.05rem;
  transition: all var(--transition);
  box-shadow: 0 4px 15px rgba(227,27,35,0.3);
  border: 1px solid rgba(255,255,255,0.2);
}

.cta-button:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px) scale(1.02);
  box-shadow: 0 8px 25px rgba(227,27,35,0.4);
  color: #fff;
}

.slider-prev, .slider-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  color: #fff;
  background: rgba(255,255,255,0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255,255,255,0.2);
  transition: all var(--transition);
  z-index: 2;
}

.slider-prev { left: 1rem; }
.slider-next { right: 1rem; }

.slider-prev:hover, .slider-next:hover {
  background: var(--color-primary);
  border-color: var(--color-primary);
  transform: translateY(-50%) scale(1.1);
}

.slider-dots {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 0.75rem;
  z-index: 2;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.3);
  border: 2px solid rgba(255,255,255,0.2);
  transition: all var(--transition);
  cursor: pointer;
}

.dot.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  transform: scale(1.2);
  box-shadow: 0 0 10px rgba(227,27,35,0.5);
}

.dot:hover {
  background: rgba(255,255,255,0.6);
}

/* ===== 时间线 ===== */
.timeline {
  position: relative;
  padding-left: 2rem;
  border-left: 3px solid var(--color-primary);
}

.timeline-item {
  position: relative;
  padding: 1.5rem 0 1.5rem 2rem;
  margin-bottom: 1rem;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: -2.5rem;
  top: 1.75rem;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--color-primary);
  border: 3px solid var(--color-bg);
  box-shadow: 0 0 0 3px var(--color-primary);
}

.timeline-item time {
  display: inline-block;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
  background: rgba(227,27,35,0.1);
  padding: 0.2rem 0.75rem;
  border-radius: var(--radius-sm);
}

.timeline-item p {
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 产品卡片 ===== */
.product-card {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.product-card img {
  border-radius: var(--radius-sm);
  width: 100%;
  height: 200px;
  object-fit: cover;
  transition: transform var(--transition);
}

.product-card:hover img {
  transform: scale(1.03);
}

.product-card .price {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-primary);
}

.product-card a {
  align-self: flex-start;
  padding: 0.5rem 1.25rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all var(--transition);
}

.product-card a:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(227,27,35,0.3);
  color: #fff;
}

/* ===== 团队卡片 ===== */
.team-card {
  text-align: center;
}

.team-card img {
  border-radius: 50%;
  margin: 0 auto 1rem;
  width: 120px;
  height: 120px;
  object-fit: cover;
  border: 3px solid var(--color-primary);
  transition: all var(--transition);
}

.team-card:hover img {
  transform: scale(1.05);
  box-shadow: 0 0 20px rgba(227,27,35,0.3);
}

/* ===== 资讯卡片 ===== */
.insight-card time {
  display: block;
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin: 0.5rem 0;
}

.insight-card a {
  display: inline-block;
  margin-top: 0.5rem;
  font-weight: 600;
  color: var(--color-primary);
}

/* ===== FAQ ===== */
.faq-item {
  margin-bottom: 0.75rem;
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}

.faq-item summary {
  padding: 1.25rem 1.5rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: all var(--transition);
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 1.5rem;
  font-weight: 300;
  transition: transform var(--transition);
  color: var(--color-primary);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  background: rgba(227,27,35,0.05);
  border-bottom: 1px solid var(--color-border);
}

.faq-item p {
  padding: 1.25rem 1.5rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ===== 快速入门步骤 ===== */
.howto-steps {
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.howto-steps li {
  counter-increment: step;
  padding: 1.25rem 1.5rem 1.25rem 3.5rem;
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  position: relative;
  transition: all var(--transition);
}

.howto-steps li:hover {
  transform: translateX(4px);
  border-color: var(--color-primary);
}

.howto-steps li::before {
  content: counter(step);
  position: absolute;
  left: 1rem;
  top: 1.25rem;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50%;
  font-weight: 700;
  font-size: 0.9rem;
}

/* ===== 联系表单 ===== */
.contact-form form {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding: 2rem;
  border-radius: var(--radius-md);
}

.contact-form label {
  font-weight: 600;
  font-size: 0.925rem;
}

.contact-form input, .contact-form textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: var(--color-bg);
  color: var(--color-text);
  font-size: 1rem;
  transition: border-color var(--transition);
}

.contact-form input:focus, .contact-form textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(227,27,35,0.12);
}

.contact-form button {
  padding: 0.875rem 2rem;
  background: var(--color-primary);
  color: #fff;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  align-self: flex-start;
  transition: all var(--transition);
}

.contact-form button:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(227,27,35,0.3);
}

/* ===== 用户评价 ===== */
.testimonials-grid blockquote {
  padding: 2rem;
  position: relative;
}

.testimonials-grid blockquote::before {
  content: '"';
  font-size: 4rem;
  line-height: 1;
  color: var(--color-primary);
  opacity: 0.2;
  position: absolute;
  top: 0.5rem;
  left: 1rem;
  font-family: Georgia, serif;
}

.testimonials-grid blockquote p {
  font-style: italic;
  line-height: 1.7;
  margin-bottom: 1rem;
}

.testimonials-grid blockquote footer {
  font-weight: 600;
  color: var(--color-text-muted);
  font-style: normal;
}

/* ===== Footer ===== */
#site-footer {
  background: var(--color-secondary);
  color: #ccc;
  padding: 3rem 1.5rem 1.5rem;
  margin-top: 2rem;
}

.footer-grid {
  display: grid;
  gap: 2rem;
  max-width: var(--max-width);
  margin: 0 auto;
}

@media (min-width: 768px) {
  .footer-grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
}

.footer-brand svg {
  margin-bottom: 0.75rem;
}

.footer-brand p {
  font-size: 1rem;
  color: #aaa;
}

.footer-links h3, .footer-legal h3, .footer-social h3 {
  color: #fff;
  font-size: 1rem;
  margin-bottom: 1rem;
}

.footer-links ul, .footer-legal ul, .footer-social ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.footer-links a, .footer-legal a, .footer-social a {
  color: #aaa;
  font-size: 0.9rem;
  transition: color var(--transition);
}

.footer-links a:hover, .footer-legal a:hover, .footer-social a:hover {
  color: var(--color-primary);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(255,255,255,0.08);
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: #777;
  margin-bottom: 0.25rem;
}

/* ===== 返回顶部 ===== */
#back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: none;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: #fff;
  box-shadow: 0 4px 15px rgba(227,27,35,0.3);
  z-index: 100;
  transition: all var(--transition);
  border: 1px solid rgba(255,255,255,0.2);
}

#back-to-top:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 8px 25px rgba(227,27,35,0.4);
  background: var(--color-primary-dark);
}

/* ===== 滚动动画 (IntersectionObserver) ===== */
section, .card, .product-card, .service-card, .team-card, .insight-card, 
.case-card, .knowledge-card, .testimonials-grid blockquote {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

section.visible, .card.visible, .product-card.visible, .service-card.visible, 
.team-card.visible, .insight-card.visible, .case-card.visible, 
.knowledge-card.visible, .testimonials-grid blockquote.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 错开动画延迟 */
.about-grid > *, .products-grid > *, .services-grid > *, .team-grid > *,
.insights-grid > *, .case-grid > *, .knowledge-grid > *, .features-grid > *,
.solutions-grid > *, .testimonials-grid > * {
  transition-delay: calc(var(--i, 0) * 0.1s);
}

/* ===== 暗色模式额外调整 ===== */
body.dark-mode .cta-button {
  box-shadow: 0 4px 15px rgba(227,27,35,0.4);
}

body.dark-mode .slide-content h1, 
body.dark-mode .slide-content h2 {
  text-shadow: 0 2px 30px rgba(0,0,0,0.5);
}

body.dark-mode .contact-form input,
body.dark-mode .contact-form textarea {
  background: var(--color-bg-alt);
}

/* ===== 响应式微调 ===== */
@media (max-width: 480px) {
  .hero-slider {
    min-height: 50vh;
  }
  .slider-prev, .slider-next {
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
  }
  .slider-prev { left: 0.5rem; }
  .slider-next { right: 0.5rem; }
  .slide-content {
    padding: 1rem;
  }
  .product-card img {
    height: 160px;
  }
}

@media (max-width: 640px) {
  #main-navigation {
    padding: 0 1rem;
  }
  .nav-actions button {
    width: 36px;
    height: 36px;
  }
  .timeline {
    padding-left: 1.5rem;
  }
  .timeline-item {
    padding-left: 1.5rem;
  }
  .timeline-item::before {
    left: -2rem;
    width: 12px;
    height: 12px;
  }
}

/* ===== 打印样式 ===== */
@media print {
  #site-header, #back-to-top, #mobile-menu, .slider-prev, .slider-next, 
  .slider-dots, .nav-actions, #search-bar {
    display: none !important;
  }
  body {
    background: #fff;
    color: #000;
  }
  .card, .about-card, .product-card, .service-card, .team-card, 
  .insight-card, .case-card, .knowledge-card, .feature-card, .solution-card {
    box-shadow: none;
    border: 1px solid #ddd;
    break-inside: avoid;
  }
  section {
    padding: 2rem 0;
  }
}