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

:root {
  --navy: #8B2500;
  --tech-blue: #E65100;
  --electric: #FF9800;
  --dark: #3E2723;
  --light-bg: #FDF6F0;
  --white: #FFFFFF;
  --gray: #6B7280;
  --text-dark: #3E2723;
  --gradient-primary: linear-gradient(135deg, #E57373 0%, #FFA726 100%);
  --gradient-accent: linear-gradient(135deg, #FF6D00 0%, #FFAB00 100%);
  --shadow-sm: 0 4px 6px rgba(139, 37, 0, 0.1);
  --shadow-md: 0 8px 25px rgba(139, 37, 0, 0.12);
  --shadow-lg: 0 20px 60px rgba(139, 37, 0, 0.15);
  --shadow-glow: 0 0 30px rgba(255, 109, 0, 0.3);
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 100px;
}

/* 确保锚点跳转时目标位置不被导航栏遮挡 */
section[id], footer[id] {
  scroll-margin-top: 100px;
}

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

/* ===== Navbar ===== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1rem 0;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  transition: all 0.3s ease;
  box-shadow: var(--shadow-sm);
}

.navbar.scrolled {
  padding: 0.75rem 0;
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
}

.nav-container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-family: 'Poppins', sans-serif;
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--navy);
  text-decoration: none;
}

.nav-logo-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.nav-logo-icon img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.nav-logo span {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2.5rem;
}

.nav-menu a {
  color: var(--text-dark);
  text-decoration: none;
  font-weight: 500;
  font-size: 0.95rem;
  transition: color 0.3s ease;
  position: relative;
}

.nav-menu a::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-accent);
  transition: width 0.3s ease;
}

.nav-menu a:hover {
  color: var(--tech-blue);
}

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

.nav-cta {
  background: var(--gradient-accent);
  color: white;
  padding: 0.6rem 1.5rem;
  border-radius: 25px;
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  transition: all 0.3s ease;
}

.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-glow);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 25px;
  height: 3px;
  background: var(--navy);
  border-radius: 3px;
  transition: all 0.3s ease;
}

/* ===== Hero Section ===== */
.hero {
  min-height: 100vh;
  background: linear-gradient(180deg, #FFF9F5 0%, #FFF3E8 50%, #FFE8D4 100%);
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 120px 0 80px;
}

.hero-bg-animation {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-bg-animation::before,
.hero-bg-animation::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
  animation: float 20s infinite ease-in-out;
}

.hero-bg-animation::before {
  width: 600px;
  height: 600px;
  background: var(--tech-blue);
  top: -200px;
  right: -100px;
}

.hero-bg-animation::after {
  width: 400px;
  height: 400px;
  background: var(--electric);
  bottom: -100px;
  left: -50px;
  animation-delay: -10s;
}

@keyframes float {
  0%, 100% { transform: translate(0, 0) rotate(0deg); }
  33% { transform: translate(50px, 50px) rotate(120deg); }
  66% { transform: translate(-30px, 30px) rotate(240deg); }
}

.particles {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 4px;
  height: 4px;
  background: rgba(255, 255, 255, 0.5);
  border-radius: 50%;
  animation: particleFloat 15s infinite linear;
}

@keyframes particleFloat {
  0% { transform: translateY(100vh) scale(0); opacity: 0; }
  10% { opacity: 1; }
  90% { opacity: 1; }
  100% { transform: translateY(-100vh) scale(1); opacity: 0; }
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 2rem;
  position: relative;
  z-index: 1;
}

.hero-content {
  text-align: center;
  color: var(--navy);
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background: rgba(255, 152, 0, 0.1);
  border: 1px solid rgba(255, 152, 0, 0.3);
  color: var(--electric);
  padding: 0.5rem 1.25rem;
  border-radius: 50px;
  font-size: 0.875rem;
  margin-bottom: 2rem;
  backdrop-filter: blur(10px);
  animation: fadeInDown 1s ease;
}

.hero-badge-dot {
  width: 8px;
  height: 8px;
  background: var(--electric);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.5; }
}

.hero h1 {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2.5rem, 6vw, 4.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  animation: fadeInUp 1s ease 0.2s both;
}

.hero h1 .highlight {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--gray);
  margin-bottom: 2.5rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  animation: fadeInUp 1s ease 0.4s both;
}

.hero-buttons {
  display: flex;
  gap: 1.25rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s ease 0.6s both;
}

.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 1rem 2.5rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1rem;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: white;
  box-shadow: 0 8px 25px rgba(255, 109, 0, 0.4);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 35px rgba(255, 109, 0, 0.5);
}

.btn-secondary {
  background: transparent;
  color: var(--electric);
  border: 2px solid var(--electric);
}

.btn-secondary:hover {
  background: rgba(255, 152, 0, 0.1);
  border-color: var(--electric);
  transform: translateY(-3px);
}

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

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

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 4rem;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 20px;
  backdrop-filter: blur(20px);
  border: 1px solid rgba(255, 152, 0, 0.2);
  box-shadow: 0 8px 32px rgba(255, 152, 0, 0.1);
  animation: fadeInUp 1s ease 0.8s both;
}

.hero-stat {
  text-align: center;
  min-width: 0;
}

.hero-stat .stat-number {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(1.8rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--electric);
  white-space: nowrap;
}

.hero-stat .stat-label {
  font-size: 0.95rem;
  color: var(--gray);
  margin-top: 0.35rem;
}

/* ===== Solutions Section ===== */
.section {
  padding: 6rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: inline-block;
  color: var(--tech-blue);
  font-weight: 600;
  font-size: 0.875rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.section-title {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--gray);
  max-width: 600px;
  margin: 0 auto;
}

.solutions {
  background: var(--light-bg);
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.solution-card {
  background: var(--white);
  border-radius: 24px;
  padding: 2.5rem;
  transition: all 0.4s ease;
  border: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
}

.solution-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.4s ease;
}

.solution-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.solution-card:hover::before {
  transform: scaleX(1);
}

.solution-icon {
  width: 72px;
  height: 72px;
  border-radius: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1.5rem;
  font-size: 2rem;
}

.solution-icon.rental {
  background: linear-gradient(135deg, #FFB74D 0%, #FFC107 100%);
  color: white;
}

.solution-icon.charging {
  background: linear-gradient(135deg, #FFA726 0%, #FFB74D 100%);
  color: white;
}

.solution-icon.used {
  background: linear-gradient(135deg, #FF8A65 0%, #FFA726 100%);
  color: white;
}

.solution-card h3 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.75rem;
}

.solution-card p {
  color: var(--gray);
  margin-bottom: 1.5rem;
  line-height: 1.7;
}

.solution-features {
  list-style: none;
  margin-bottom: 2rem;
}

.solution-features li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0;
  font-size: 0.9rem;
  color: var(--text-dark);
}

.solution-features li::before {
  content: '✓';
  color: var(--tech-blue);
  font-weight: bold;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(230, 81, 0, 0.1);
  border-radius: 50%;
  font-size: 0.75rem;
}

.solution-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--tech-blue);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  transition: gap 0.3s ease;
}

.solution-link:hover {
  gap: 0.75rem;
}

/* ===== Stats Section ===== */
.stats {
  background: linear-gradient(180deg, #FFF3E8 0%, #FFE8D4 100%);
  color: var(--navy);
  position: relative;
  overflow: hidden;
}

.stats::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23FF9800' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  position: relative;
  z-index: 1;
}

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

.stat-number {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  font-weight: 800;
  color: var(--electric);
  line-height: 1;
  white-space: nowrap;
}

.stat-suffix {
  font-size: 2rem;
  font-weight: 600;
  color: var(--electric);
}

.stat-item-label {
  margin-top: 0.75rem;
  font-size: 1rem;
  color: var(--gray);
}

/* ===== About Section ===== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-image {
  position: relative;
}

.about-image-placeholder {
  width: 100%;
  height: 400px;
  background: var(--gradient-primary);
  border-radius: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}

.about-image-placeholder::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 30%, rgba(255, 109, 0, 0.3), transparent 60%),
              radial-gradient(circle at 70% 70%, rgba(255, 171, 0, 0.2), transparent 60%);
}

.about-image-content {
  position: relative;
  z-index: 1;
  color: white;
  text-align: center;
}

.about-image-content .icon {
  font-size: 5rem;
  margin-bottom: 1rem;
  display: block;
}

.about-image-content p {
  font-size: 1.25rem;
  font-weight: 600;
}

.about-badge {
  position: absolute;
  bottom: -20px;
  right: -20px;
  background: var(--white);
  padding: 1.5rem 2rem;
  border-radius: 20px;
  box-shadow: var(--shadow-lg);
  text-align: center;
}

.about-badge .number {
  font-family: 'Poppins', sans-serif;
  font-size: 2.5rem;
  font-weight: 800;
  color: var(--tech-blue);
  line-height: 1;
}

.about-badge .label {
  font-size: 0.875rem;
  color: var(--gray);
}

.about-content h2 {
  font-family: 'Poppins', sans-serif;
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 1.5rem;
}

.about-content p {
  color: var(--gray);
  margin-bottom: 1.5rem;
  line-height: 1.8;
}

.about-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  margin-top: 2rem;
}

.about-feature {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.about-feature-icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--gradient-accent);
  color: white;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  font-size: 1.25rem;
}

.about-feature h4 {
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.about-feature p {
  font-size: 0.875rem;
  margin: 0;
}

/* ===== Timeline ===== */
.timeline {
  background: var(--light-bg);
}

.timeline-container {
  max-width: 800px;
  margin: 0 auto;
  position: relative;
}

.timeline-container::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--gradient-accent);
  transform: translateX(-50%);
  border-radius: 3px;
}

.timeline-item {
  display: flex;
  align-items: center;
  margin-bottom: 3rem;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row;
}

.timeline-item:nth-child(even) {
  flex-direction: row-reverse;
}

.timeline-content {
  width: calc(50% - 40px);
  background: var(--white);
  padding: 1.5rem;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
}

.timeline-dot {
  width: 30px;
  height: 30px;
  background: var(--gradient-accent);
  border-radius: 50%;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1;
  box-shadow: 0 0 0 5px var(--light-bg), 0 0 0 8px var(--gradient-accent);
}

.timeline-year {
  font-family: 'Poppins', sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--tech-blue);
  margin-bottom: 0.5rem;
}

.timeline-content h4 {
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.timeline-content p {
  font-size: 0.9rem;
  color: var(--gray);
  margin: 0;
}

/* ===== Partners ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1.5rem;
}

.partner-card {
  background: var(--light-bg);
  border-radius: 16px;
  padding: 2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  color: var(--navy);
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid transparent;
}

.partner-card:hover {
  background: var(--white);
  box-shadow: var(--shadow-md);
  border-color: var(--tech-blue);
  transform: translateY(-5px);
}

/* ===== Footer ===== */
.footer {
  background: var(--dark);
  color: var(--white);
  padding: 4rem 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-col h4 {
  font-family: 'Poppins', sans-serif;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  color: var(--white);
}

.footer-col ul {
  list-style: none;
}

.footer-col li {
  margin-bottom: 0.75rem;
}

.footer-col a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
  font-size: 0.9rem;
}

.footer-col a:hover {
  color: var(--electric);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  margin: 1rem 0;
  font-size: 0.9rem;
  line-height: 1.7;
}

.footer-brand .nav-logo {
  color: white;
}

.footer-brand .nav-logo span {
  -webkit-text-fill-color: var(--electric);
}

.footer-social {
  display: flex;
  gap: 1rem;
  margin-top: 1.5rem;
}

.footer-social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  text-decoration: none;
  transition: all 0.3s ease;
  font-size: 1.1rem;
}

.footer-social a:hover {
  background: var(--gradient-accent);
  transform: translateY(-3px);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 2rem 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.875rem;
}

/* ===== Scroll Animations ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.active {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .about-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }

  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }

  .nav-cta {
    display: none;
  }

  .hero {
    padding: 100px 0 60px;
  }

  .section {
    padding: 4rem 0;
  }

  .timeline-container::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(even) {
    flex-direction: row;
    padding-left: 50px;
  }

  .timeline-content {
    width: 100%;
  }

  .timeline-dot {
    left: 20px;
  }

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

  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .container {
    padding: 0 1.25rem;
  }
  
  .about-card {
    grid-template-columns: 1fr;
    padding: 1.5rem;
    gap: 1.5rem;
  }
  
  .about-intro-section {
    max-width: 100%;
  }
  
  .about-bottom-section {
    grid-template-columns: 1fr;
    max-width: 100%;
    gap: 1.5rem;
  }
  
  .about-cities-showcase {
    padding: 1rem;
  }
  
  .cities-showcase-title {
    font-size: 1.05rem;
  }
  
  .city-tag {
    padding: 3px 10px;
    font-size: 0.75rem;
  }
}

/* ===== About Company Card Layout ===== */
.about-company {
  background: var(--white);
}

.about-card {
  position: relative;
  background: var(--white);
  border: 2px solid rgba(139, 37, 0, 0.15);
  border-radius: 24px;
  padding: 3rem;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(139, 37, 0, 0.08);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: stretch;
}

/* 展业城市卡片展示 */
.about-cities-showcase {
  background: linear-gradient(135deg, #FFF8E1 0%, #FFE0B2 100%);
  border-radius: 20px;
  padding: 1.5rem;
  box-shadow: inset 0 2px 20px rgba(139, 37, 0, 0.1);
  position: relative;
  overflow: hidden;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.about-cities-showcase::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(255, 152, 0, 0.2) 0%, transparent 70%);
  pointer-events: none;
}

.cities-showcase-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 2px dashed rgba(139, 37, 0, 0.2);
  position: relative;
  z-index: 1;
}

.cities-showcase-title {
  font-family: 'Poppins', 'PingFang SC', sans-serif;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  letter-spacing: 0.1em;
}

.cities-count {
  background: var(--gradient-accent);
  color: var(--white);
  padding: 6px 14px;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.cities-regions {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: relative;
  z-index: 1;
  flex: 1;
}

.region-block {
  background: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
  padding: 1rem;
  transition: all 0.3s ease;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.region-block:hover {
  background: rgba(255, 255, 255, 0.95);
  transform: translateX(4px);
  box-shadow: 0 4px 15px rgba(139, 37, 0, 0.1);
}

.region-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.region-icon {
  font-size: 1.1rem;
}

.region-name {
  font-weight: 700;
  color: var(--navy);
  font-size: 0.95rem;
}

.region-count {
  background: var(--tech-blue);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 8px;
  border-radius: 10px;
  margin-left: auto;
}

.city-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-content: flex-start;
}

.city-tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  background: var(--white);
  border: 1px solid rgba(139, 37, 0, 0.15);
  border-radius: 16px;
  font-size: 0.8rem;
  color: var(--text-dark);
  transition: all 0.2s ease;
}

.city-tag:hover {
  background: var(--tech-blue);
  color: var(--white);
  border-color: var(--tech-blue);
  transform: scale(1.05);
}

.city-tag.core {
  background: var(--gradient-accent);
  color: var(--white);
  border-color: transparent;
  font-weight: 600;
}

.city-tag.core:hover {
  filter: brightness(1.1);
  transform: scale(1.05);
}

/* 地图容器 - 保留用于兼容 */
.about-map-container {
  position: relative;
  width: 100%;
  margin-bottom: 2.5rem;
}

.china-map-wrapper {
  position: relative;
  width: 100%;
  background: linear-gradient(135deg, #FFF8E1 0%, #FFE0B2 50%, #FFCCBC 100%);
  border-radius: 20px;
  overflow: hidden;
  box-shadow: inset 0 2px 20px rgba(139, 37, 0, 0.1);
}

.china-map-svg {
  width: 100%;
  height: auto;
  display: block;
}

/* 地图区域标签动画 */
@keyframes pulse {
  0% { transform: scale(1); opacity: 0.5; }
  50% { transform: scale(1.5); opacity: 0; }
  100% { transform: scale(1); opacity: 0.5; }
}

.about-map-bg {
  position: absolute;
  top: 0;
  right: 0;
  width: 60%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
  opacity: 0.8;
}

.about-map-bg svg {
  width: 100%;
  height: 100%;
}

.about-card-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.about-title {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1.5rem;
  padding-bottom: 0.75rem;
  border-bottom: 3px solid var(--tech-blue);
  display: inline-block;
  letter-spacing: 0.1em;
}

.about-intro-section {
  margin-bottom: 2rem;
  max-width: 100%;
  flex: 0 0 auto;
}

.about-honors-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  margin-top: 1rem;
}

.about-intro-text p {
  color: var(--text-dark);
  line-height: 2;
  margin-bottom: 1.25rem;
  font-size: 1rem;
  text-indent: 2em;
}

.highlight-orange {
  color: var(--tech-blue);
  font-weight: 700;
}

.about-bottom-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  max-width: 70%;
}

.about-subtitle {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1.25rem;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--tech-blue);
  display: inline-block;
  letter-spacing: 0.1em;
}

.about-honors-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  flex: 1;
}

.about-honors-list li {
  padding: 0.6rem 0;
  color: var(--text-dark);
  font-size: 0.95rem;
  padding-left: 1.2rem;
  position: relative;
  line-height: 1.8;
}

.about-honors-list li::before {
  content: '◆';
  position: absolute;
  left: 0;
  color: var(--tech-blue);
  font-size: 0.7rem;
}

.about-cities-list p {
  padding: 0.4rem 0;
  color: var(--text-dark);
  font-size: 0.9rem;
  line-height: 1.8;
}

.city-diamond {
  color: var(--tech-blue);
  font-weight: 700;
  margin-right: 4px;
}

/* ===== Partners Grid ===== */
.partners-section {
  background: var(--white);
}

.partners-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  justify-content: center;
}

.partner-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  border: 1px solid rgba(139, 37, 0, 0.15);
  border-radius: 6px;
  transition: all 0.2s ease;
  cursor: pointer;
  background: transparent;
}

.partner-item:hover {
  border-color: var(--electric);
  background: rgba(255, 152, 0, 0.04);
  box-shadow: 0 2px 8px rgba(255, 152, 0, 0.12);
  transform: translateY(-1px);
}

.partner-logo {
  width: 24px;
  height: 24px;
  object-fit: contain;
  filter: grayscale(70%);
  opacity: 0.7;
  transition: all 0.2s ease;
}

.partner-item:hover .partner-logo {
  filter: grayscale(0%);
  opacity: 1;
}

.partner-fallback {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 10px;
  font-weight: 600;
  border-radius: 3px;
}

.partner-name {
  font-size: 13px;
  color: var(--text-dark);
  font-weight: 500;
  white-space: nowrap;
  transition: color 0.2s ease;
}

.partner-item:hover .partner-name {
  color: var(--navy);
}

@media (max-width: 768px) {
  .partners-grid {
    gap: 8px;
  }
  
  .partner-item {
    padding: 5px 10px;
    gap: 6px;
  }
  
  .partner-logo,
  .partner-fallback {
    width: 20px;
    height: 20px;
    font-size: 9px;
  }
  
  .partner-name {
    font-size: 11px;
  }
}

/* ===== Corporate Culture ===== */
.culture-section {
  background: var(--light-bg);
}

.culture-card {
  display: flex;
  align-items: stretch;
  background: var(--white);
  border-radius: 24px;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.culture-left {
  flex: 0 0 280px;
  background: var(--gradient-primary);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 2rem;
  position: relative;
}

.culture-title-vertical {
  writing-mode: vertical-rl;
  text-orientation: upright;
  font-size: 3rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.5em;
  text-shadow: 0 2px 20px rgba(0,0,0,0.2);
}

.culture-tag {
  margin-top: 2rem;
  background: var(--white);
  color: var(--tech-blue);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  font-size: 0.85rem;
  font-weight: 600;
}

.culture-right {
  flex: 1;
  padding: 3rem;
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2rem;
}

.culture-item {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.culture-label {
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--dark);
  min-width: 100px;
}

.culture-desc {
  background: linear-gradient(135deg, #FFE0B2 0%, #FFCCBC 100%);
  border-radius: 12px;
  padding: 1rem 2rem;
  font-size: 1.1rem;
  color: var(--navy);
  font-weight: 600;
  letter-spacing: 0.05em;
  box-shadow: 0 4px 12px rgba(230, 81, 0, 0.15);
}

/* ===== News Section ===== */
.news-section {
  background: var(--white);
}

.news-card {
  background: var(--light-bg);
  border-radius: 20px;
  padding: 2.5rem;
  margin-bottom: 2rem;
  transition: all 0.3s ease;
}

.news-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
}

.news-tag {
  display: inline-block;
  background: var(--gradient-accent);
  color: var(--white);
  padding: 0.3rem 1rem;
  border-radius: 12px;
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 1rem;
}

.news-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 1rem;
  line-height: 1.4;
}

.news-content p {
  color: var(--text-dark);
  line-height: 1.9;
  margin-bottom: 1rem;
  font-size: 0.95rem;
}

.news-highlight {
  color: var(--tech-blue);
  font-weight: 600;
}

.news-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin-top: 1.5rem;
}

.news-gallery-item {
  background: var(--white);
  border-radius: 12px;
  padding: 1.5rem;
  text-align: center;
  border: 1px solid rgba(139, 37, 0, 0.08);
}

.news-gallery-item h4 {
  color: var(--tech-blue);
  font-size: 1rem;
  margin-bottom: 0.5rem;
}

.news-gallery-item p {
  color: var(--gray);
  font-size: 0.85rem;
}

/* ===== Responsive Updates ===== */
@media (max-width: 1024px) {
  .about-intro-section {
    max-width: 100%;
  }
  
  .about-bottom-section {
    max-width: 100%;
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .culture-card {
    flex-direction: column;
  }
  
  .culture-left {
    flex: none;
    padding: 2rem;
  }
  
  .culture-title-vertical {
    writing-mode: horizontal-tb;
    letter-spacing: 0.3em;
  }
}

@media (max-width: 768px) {
  .about-card {
    padding: 2rem 1.5rem;
  }
  
  .about-map-bg {
    width: 100%;
    opacity: 0.4;
  }
  
  .about-intro-section {
    max-width: 100%;
  }
  
  .about-bottom-section {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  
  .culture-right {
    padding: 2rem 1.5rem;
  }
  
  .culture-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.75rem;
  }
  
  .news-card {
    padding: 1.5rem;
  }
  
  .news-title {
    font-size: 1.25rem;
  }
  
  .qrcode-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ===== QR Code Section ===== */
.qrcode-section {
  background: var(--light-bg);
  padding: 4rem 0;
}

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

.qrcode-header {
  margin-bottom: 2rem;
}

.qrcode-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.qrcode-desc {
  color: var(--gray);
  font-size: 0.95rem;
}

.qrcode-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  margin-bottom: 2rem;
}

.qrcode-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  cursor: pointer;
}

.qrcode-box {
  position: relative;
  width: 180px;
  height: 180px;
  background: var(--white);
  border-radius: 16px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 20px rgba(139, 37, 0, 0.08);
  border: 2px solid rgba(139, 37, 0, 0.1);
  transition: all 0.3s ease;
  overflow: hidden;
}

.qrcode-box.clickable {
  cursor: pointer;
}

.qrcode-box:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 40px rgba(139, 37, 0, 0.2);
  border-color: var(--tech-blue);
}

.qrcode-box img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: transform 0.3s ease;
}

.qrcode-box:hover img {
  transform: scale(0.95);
}

.qrcode-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, #FFF3E0 0%, #FFE0B2 100%);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--tech-blue);
  flex-direction: column;
  gap: 0.5rem;
}

.qrcode-placeholder span {
  font-size: 0.75rem;
  color: var(--gray);
}

.qrcode-hover-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(139, 37, 0, 0.7);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  border-radius: 14px;
}

.qrcode-hover-overlay span {
  color: white;
  font-size: 0.9rem;
  font-weight: 600;
  padding: 8px 16px;
  border: 2px solid white;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.1);
}

.qrcode-box:hover .qrcode-hover-overlay {
  opacity: 1;
}

.app-box {
  padding: 0.75rem;
}

.app-download {
  display: flex;
  align-items: center;
  justify-content: space-around;
  width: 100%;
  height: 100%;
}

.app-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  color: var(--tech-blue);
  font-weight: 600;
}

.app-item img {
  width: 55px;
  height: 55px;
  object-fit: contain;
}

.app-divider {
  width: 1px;
  height: 60px;
  background: var(--gray);
  opacity: 0.3;
}

.qrcode-label h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 0.25rem;
}

.qrcode-label p {
  font-size: 0.85rem;
  color: var(--gray);
}

.qrcode-hint {
  margin-top: 1rem;
}

.qrcode-hint p {
  color: var(--gray);
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

/* ===== QR Modal ===== */
.qr-modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.8);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  padding: 20px;
  animation: fadeIn 0.3s ease;
}

.qr-modal.active {
  display: flex;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.qr-modal-content {
  background: white;
  border-radius: 20px;
  padding: 2.5rem;
  max-width: 400px;
  width: 100%;
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  animation: slideUp 0.3s ease;
}

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

.qr-modal-close {
  position: absolute;
  top: 15px;
  right: 20px;
  font-size: 2rem;
  color: var(--gray);
  cursor: pointer;
  line-height: 1;
  transition: color 0.3s;
  z-index: 10;
}

.qr-modal-close:hover {
  color: var(--navy);
}

.qr-modal-body {
  width: 240px;
  height: 240px;
  margin: 0 auto 1.5rem;
  background: var(--light-bg);
  border-radius: 16px;
  padding: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.qr-modal-body img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.qr-modal-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--gray);
  text-align: center;
}

.qr-modal-placeholder p {
  font-size: 0.85rem;
  margin: 0;
}

.qr-modal-title {
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 0.5rem;
}

.qr-modal-desc {
  text-align: center;
  color: var(--gray);
  margin-bottom: 1.5rem;
}

.qr-modal-tip {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  background: var(--light-bg);
  border-radius: 10px;
  padding: 0.75rem 1rem;
  color: var(--tech-blue);
  font-size: 0.85rem;
}

/* App modal specific */
.app-modal-body {
  display: flex;
  gap: 2rem;
  justify-content: center;
  margin-bottom: 1.5rem;
}

.app-modal-item {
  text-align: center;
}

.app-modal-item img {
  width: 120px;
  height: 120px;
  object-fit: contain;
  margin-bottom: 0.5rem;
}

.app-modal-item h4 {
  color: var(--navy);
  font-weight: 600;
  margin-bottom: 0.25rem;
}

.app-modal-item p {
  color: var(--gray);
  font-size: 0.85rem;
  margin: 0;
}

@media (max-width: 768px) {
  .qrcode-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .qrcode-box {
    width: 150px;
    height: 150px;
  }
  
  .qr-modal-content {
    padding: 1.5rem;
    max-width: 320px;
  }
  
  .qr-modal-body {
    width: 200px;
    height: 200px;
  }
  
  .app-modal-body {
    flex-direction: column;
    gap: 1.5rem;
    align-items: center;
  }
}