/* 全局样式 */
body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    background-color: #f4f6f9;
}

header {
    background: linear-gradient(90deg, #007BFF, #00A1FF);
    color: white;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.2);
}

nav {
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.navbar-nav .nav-link {
    font-weight: 500;
    transition: color 0.3s;
}

.navbar-nav .nav-link:hover {
    color: #0056b3;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 10px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(90deg, #007BFF, #0056b3);
    border: none;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(90deg, #0056b3, #003d80);
    transform: scale(1.05);
}

/* 表格样式 */
.table {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.table thead {
    background-color: #007BFF;
    color: white;
}

.table th, .table td {
    vertical-align: middle;
}

/* 页脚样式 */
footer {
    background: #343a40;
    color: #adb5bd;
    font-size: 0.9rem;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 响应式优化 */
@media (max-width: 768px) {
    header {
        text-align: center;
    }

    .card {
        margin-bottom: 20px;
    }
}