* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    background: #f8f9fa;
    font-family: "Microsoft Yahei", sans-serif;
    line-height: 1.6;
}
.card {
    border-radius: 12px;
    border: none;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}
.btn {
    border-radius: 8px;
}
.table th {
    background: #f8f9fa;
    font-weight: 600;
}