/* ========== 172号卡帮助中心 全局样式 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', sans-serif;
  background-color: #f5f7fc;
  color: #1e293b;
  line-height: 1.5;
}

.main-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 60px;
}

.page-header {
  text-align: center;
  margin-bottom: 48px;
}

.page-header h1 {
  font-size: 2.2rem;
  font-weight: 700;
  background: linear-gradient(135deg, #1e2b3c, #2c4b6e);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 12px;
}

.page-header p {
  color: #5b6e8c;
  font-size: 1rem;
}

.welcome-banner {
  background: linear-gradient(98deg, #eef4ff, #ffffff);
  border-left: 5px solid #4A90E2;
  padding: 16px 24px;
  border-radius: 16px;
  margin-bottom: 40px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.welcome-banner i {
  font-size: 1.6rem;
  color: #4A90E2;
}

.section-title {
  margin-top: 48px;
  margin-bottom: 20px;
  font-size: 1.6rem;
  font-weight: 600;
  border-left: 5px solid #4A90E2;
  padding-left: 16px;
  color: #0f2b3d;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-title:first-of-type {
  margin-top: 0;
}

.section-icon {
  color: #4A90E2;
  font-size: 1.4rem;
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 16px;
  margin-bottom: 8px;
}

.card {
  background: #ffffff;
  border-radius: 16px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
  padding: 16px 20px;
  transition: all 0.25s ease;
  border: 1px solid #edf2f7;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px -10px rgba(0, 0, 0, 0.12);
  border-color: #d0dfef;
}

.card a {
  text-decoration: none;
  color: #1e2f41;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 0.95rem;
}

.card a i {
  font-size: 1.25rem;
  color: #4A90E2;
  width: 28px;
}

.footer {
  margin-top: 56px;
  padding-top: 24px;
  border-top: 1px solid #e2e8f0;
  text-align: center;
  font-size: 0.75rem;
  color: #6c86a3;
}

@media (max-width: 768px) {
  .main-container {
    padding: 24px 16px 40px;
  }
  .page-header h1 {
    font-size: 1.6rem;
  }
  .section-title {
    font-size: 1.35rem;
    margin-top: 36px;
  }
  .card-grid {
    grid-template-columns: 1fr;
  }
}