header {
    border-bottom: 1px solid #e5e7eb;
    margin-bottom: 1rem;
}

header nav a {
    font-size: 0.95rem;
}

@keyframes fadeIn {
from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.fade-in {
    animation: fadeIn 0.3s ease-out forwards;
}

#infoAlert {
    animation: fadeIn 0.5s ease-out;
}

/*p {
  line-height: 1.6; /* 行高为字体大小的1.6倍 */
/*  margin-bottom: 1em;
}*/