/* 基础样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Roboto, sans-serif;
}

/* 导航栏样式 */
.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 2rem;
    background-color: #2563eb;
    color: white;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.nav-logo {
    font-size: 1.2rem;
    font-weight: 600;
}

.nav-menu {
    display: flex;
    gap: 1.5rem;
}

.nav-menu a {
    color: white;
    text-decoration: none;
    padding: 0.3rem 0.5rem;
    border-radius: 4px;
    transition: background-color 0.2s;
}

.nav-menu a:hover {
    background-color: #1d4ed8;
}

/* 卡片通用样式 */
.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    padding: 1.2rem;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #1e293b;
}

/* 按钮样式 */
.btn {
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: none;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background-color: #2563eb;
    color: white;
}

.btn-primary:hover {
    background-color: #1d4ed8;
}

.btn-secondary {
    background-color: #f1f5f9;
    color: #1e293b;
}

.btn-secondary:hover {
    background-color: #e2e8f0;
}