.solutions-hero {
  background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('https://via.placeholder.com/1920x600/0d1b2a/ffffff?text=解决方案') center/cover;
  color: white;
  text-align: center;
  padding: 100px 20px;
}

.solutions-hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
}

.solutions-hero p {
  font-size: 1.3rem;
  max-width: 800px;
  margin: 0 auto;
}

.solution-tabs {
  display: flex;
  justify-content: center;
  gap: 1rem;
  margin: 3rem auto;
  max-width: 1000px;
  flex-wrap: wrap;
}

.tab-btn {
  padding: 12px 24px;
  background: #334e68;
  border: none;
  border-radius: 50px;
  color: white;
  font-size: 1rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.tab-btn.active, .tab-btn:hover {
  background: #00b4d8;
}

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  margin: 4rem 0;
}

.solution-card {
  background: white;
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.solution-icon {
  height: 80px;
  background: #00b4d8;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 2.5rem;
}

.solution-info {
  padding: 1.5rem;
}

.solution-info h3 {
  font-size: 1.4rem;
  color: #0d1b2a;
  margin-bottom: 0.8rem;
}

.solution-info p {
  color: #555;
  line-height: 1.6;
}

.results {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px dashed #ddd;
  font-size: 0.9rem;
  color: #00b4d8;
}

.case-study {
  padding: 5rem 0;
  background: #0d1b2a;
  color: white;
  text-align: center;
}

.case-study h2 {
  color: white;
}

.case-study p {
  max-width: 800px;
  margin: 1rem auto;
  opacity: 0.9;
}

.cta-btn {
  display: inline-block;
  margin-top: 2rem;
  padding: 15px 35px;
  background: #00b4d8;
  color: white;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
}

.cta-btn:hover {
  background: #0096c7;
  transform: translateY(-3px);
}