/* 工业科技风格CSS */
:root {
  --primary-color: #007acc;
  --secondary-color: #2c3e50;
  --accent-color: #e74c3c;
  --success-color: #27ae60;
  --warning-color: #f39c12;
  --light-gray: #ecf0f1;
  --dark-gray: #34495e;
  --border-color: #bdc3c7;
  --card-bg: #ffffff;
  --panel-bg: #f8f9fa;
}

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

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  background: linear-gradient(135deg, #1a2a3a 0%, #2c3e50 100%);
  color: #ecf0f1;
  min-height: 100vh;
  padding: 20px;
}

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

.header {
  text-align: center;
  margin-bottom: 30px;
  padding: 20px;
  background: rgba(0, 0, 0, 0.3);
  border-radius: 15px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
}

.header h1 {
  font-size: 2.5rem;
  margin-bottom: 10px;
  background: linear-gradient(45deg, #00c6ff, #0072ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.header p {
  font-size: 1.1rem;
  opacity: 0.8;
}

.main-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 25px;
}

@media (max-width: 1200px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

.card {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 15px;
  padding: 25px;
  backdrop-filter: blur(10px);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.card h2 {
  font-size: 1.5rem;
  margin-bottom: 20px;
  color: #00c6ff;
  display: flex;
  align-items: center;
  gap: 10px;
}

.card h2 i {
  font-size: 1.2rem;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 600;
  color: #ecf0f1;
}

.form-group input,
.form-group select {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: white;
  font-size: 14px;
  transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(0, 122, 204, 0.2);
}

.form-group input::placeholder {
  color: rgba(255, 255, 255, 0.5);
}

.transmission-type {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 15px;
  margin-bottom: 20px;
}

.transmission-btn {
  padding: 15px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.05);
  color: white;
  cursor: pointer;
  text-align: center;
  font-weight: 600;
  transition: all 0.3s ease;
}

.transmission-btn:hover {
  background: rgba(0, 198, 255, 0.2);
  border-color: #00c6ff;
}

.transmission-btn.active {
  background: rgba(0, 198, 255, 0.3);
  border-color: #00c6ff;
  color: #00c6ff;
}

.combination-section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-group {
  display: flex;
  gap: 15px;
  margin-top: 20px;
}

.btn {
  padding: 12px 25px;
  border: none;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  flex: 1;
}

.btn-primary {
  background: linear-gradient(45deg, #007acc, #005fa3);
  color: white;
}

.btn-primary:hover {
  background: linear-gradient(45deg, #0066b3, #004d8c);
  transform: translateY(-2px);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.1);
  color: white;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.results-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.result-card {
  background: rgba(39, 174, 96, 0.1);
  border: 1px solid rgba(39, 174, 96, 0.3);
  border-radius: 10px;
  padding: 20px;
  text-align: center;
}

.result-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
  color: #27ae60;
}

.result-card .value {
  font-size: 1.8rem;
  font-weight: 700;
  color: white;
}

.result-card .unit {
  font-size: 0.9rem;
  opacity: 0.7;
}

.warning {
  background: rgba(243, 156, 18, 0.1);
  border: 1px solid rgba(243, 156, 18, 0.3);
  color: #f39c12;
  padding: 15px;
  border-radius: 8px;
  margin-top: 20px;
  display: none;
}

.error {
  background: rgba(231, 76, 60, 0.1);
  border: 1px solid rgba(231, 76, 60, 0.3);
  color: #e74c3c;
  padding: 15px;
  border-radius: 8px;
  margin-top: 20px;
  display: none;
}

.guidance-section {
  margin-top: 20px;
  padding: 15px;
  background: rgba(0, 0, 0, 0.2);
  border-radius: 10px;
  border-left: 4px solid #00c6ff;
}

.guidance-section h4 {
  margin-bottom: 10px;
  color: #00c6ff;
}

.guidance-section ul {
  padding-left: 20px;
}

.guidance-section li {
  margin-bottom: 5px;
  line-height: 1.4;
}

.hidden {
  display: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .main-content {
    gap: 15px;
  }
  
  .card {
    padding: 15px;
  }
  
  .header h1 {
    font-size: 2rem;
  }
  
  .transmission-type {
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  }
  
  .btn-group {
    flex-direction: column;
  }
  
  .btn {
    flex: none;
  }
}