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

body {
  font-family:aidianfengyahei,sans-serif;
  background: linear-gradient(135deg, #0f2027 0%, #203a43 50%, #2c5364 100%);
  color: #e0e0e0;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  line-height: 1.6;
}

.header {
  background: linear-gradient(to right, #0a3d62, #1e5799);
  color: #fff;
  padding: 1.2rem;
  text-align: center;
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
  position: relative;
  overflow: hidden;
}

.header::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(to right, rgba(0,255,255,0.7), rgba(0,150,255,0.7));
}

.container {
  max-width: 1200px;
  margin: 2rem auto;
  padding: 0 1.5rem;
  width: 100%;
}

.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  color: #4fc3f7;
  margin: 2rem 0 1.5rem;
  position: relative;
  padding-left: 1rem;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 4px;
  background: linear-gradient(to bottom, #4fc3f7, #2196f3);
  border-radius: 2px;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.8rem;
}

.card {
  background: rgba(30, 50, 70, 0.7);
  border: 1px solid rgba(100, 150, 200, 0.2);
  border-radius: 10px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1.2rem;
  transition: all 0.3s ease;
  cursor: pointer;
  backdrop-filter: blur(8px);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 25px rgba(0, 150, 255, 0.3);
  background: rgba(40, 70, 90, 0.8);
  border-color: rgba(100, 200, 255, 0.4);
}

.card-icon {
  background: linear-gradient(135deg, #2196f3, #00bcd4);
  color: #fff;
  border-radius: 10px;
  width: 50px;
  height: 50px;
  display: flex;
  justify-content: center;
  align-items: center;
  font-size: 1.5rem;
  flex-shrink: 0;
  box-shadow: 0 3px 6px rgba(0, 0, 0, 0.2);
}

.card h3 {
  color: #bbdefb;
  margin-bottom: 0.5rem;
  font-size: 1.2rem;
}

.card p {
  color: #90a4ae;
  font-size: 0.95rem;
}

.footer {
  background: linear-gradient(to right, #0a3d62, #1e5799);
  color: #fff;
  text-align: center;
  padding: 1.2rem;
  font-size: 0.9rem;
  margin-top: auto;
  position: relative;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(to right, rgba(0,255,255,0.7), rgba(0,150,255,0.7));
}

.download-btn {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  gap: 0.8rem;
  background: linear-gradient(to right, #ff9800, #ff5722);
  color: #fff;
  font-weight: 700;
  padding: 0.9rem 2rem;
  border-radius: 8px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 10px rgba(255, 152, 0, 0.3);
  text-decoration: none;
  margin: 2rem auto;
}

.download-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 15px rgba(255, 152, 0, 0.4);
  background: linear-gradient(to right, #ff5722, #ff9800);
}

.overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.85);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  animation: fadeIn 0.3s;
}

.popup {
  background: linear-gradient(145deg, #1e3c72, #2a5298);
  padding: 2.5rem;
  border-radius: 15px;
  width: 90%;
  max-width: 600px;
  text-align: center;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(100, 200, 255, 0.2);
  animation: slideIn 0.4s;
}

.popup h2 {
  margin: 0 0 1.5rem;
  color: #4fc3f7;
  font-size: 1.8rem;
}

.popup p {
  color: #bbdefb;
  margin-bottom: 1rem;
  line-height: 1.7;
  text-align: left;
}

.popup button {
  background: linear-gradient(to right, #00bcd4, #2196f3);
  color: #fff;
  border: none;
  padding: 0.8rem 2rem;
  border-radius: 8px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
  margin-top: 1.5rem;
  box-shadow: 0 3px 8px rgba(0, 150, 255, 0.3);
}

.popup button:hover {
  background: linear-gradient(to right, #2196f3, #00bcd4);
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(0, 150, 255, 0.4);
}

table {
  border-collapse: collapse;
  width: 100%;
  margin: 1rem auto;
  background: rgba(30, 50, 70, 0.6);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

th, td {
  padding: 12px 15px;
  text-align: left;
  border-bottom: 1px solid rgba(100, 150, 200, 0.2);
}

th {
  background: rgba(0, 100, 180, 0.5);
  color: #bbdefb;
  font-weight: 600;
}

tr:hover {
  background: rgba(50, 80, 110, 0.5);
}

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

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

.icp {
  font-size: 0.8rem;
  color: #fff;
  text-align: center;
  margin-top: 1rem;
}