/* 全局重置与基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', 'Helvetica', sans-serif;
}

:root {
    --primary: #005b96;
    --secondary: #0074d9;
    --light: #f8f9fa;
    --dark: #2d3436;
    --gray: #6c757d;
    --shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

body {
    background-color: var(--light);
    color: var(--dark);
    line-height: 1.7;
}

/* 导航栏 */
.navbar {
    background-color: var(--primary);
    padding: 1rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar .logo {
    color: white;
    font-size: 1.2rem;
    font-weight: bold;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #a8d1ff;
}

.language-switch {
    display: flex;
    gap: 1rem;
}

.language-switch a {
    color: white;
    text-decoration: none;
    padding: 0.3rem 0.8rem;
    border-radius: 4px;
    border: 1px solid transparent;
}

.language-switch a.active {
    background-color: var(--secondary);
    border-color: white;
}

/* 响应式导航 */
.hamburger {
    display: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 容器与卡片 */
.container {
    max-width: 1100px;
    margin: 2rem auto;
    padding: 0 5%;
}

.card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-bottom: 2rem;
}

.page-title {
    color: var(--primary);
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--secondary);
}

.card-title {
    color: var(--primary);
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

/* 表格样式 */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1rem 0;
}

.data-table th,
.data-table td {
    padding: 0.8rem;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

.data-table th {
    background-color: var(--primary);
    color: white;
}

/* 页脚 */
.footer {
    background-color: var(--primary);
    color: white;
    padding: 2rem 5%;
    margin-top: 3rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.footer-item h3 {
    font-size: 1rem;
    margin-bottom: 1rem;
    text-transform: uppercase;
}

.footer-item p,
.footer-item a {
    color: #e9ecef;
    text-decoration: none;
    font-size: 0.9rem;
}

.footer-item a:hover {
    color: #a8d1ff;
}

.copyright {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    font-size: 0.85rem;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .hamburger {
        display: block;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: var(--primary);
        padding: 1rem 5%;
        gap: 1rem;
        box-shadow: var(--shadow);
    }

    .nav-menu.show {
        display: flex;
    }

    .page-title {
        font-size: 1.5rem;
    }

    .card {
        padding: 1.5rem;
    }
}