/* ===== 统一头部样式 ===== */
.top-header {
    width: 100%;
    background-color: white;
    border-radius: 8px 8px 0 0;
    padding: 15px 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 1px;
}

.logo-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 60px;
    vertical-align: middle;
}

.header-buttons {
    display: flex;
    gap: 15px;
}

.header-btn {
    padding: 8px 15px;
    background-color: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.header-btn:hover {
    background-color: #2980b9;
}

/* ===== 统一导航栏样式 ===== */
.navigation-bar {
    width: 100%;
    background-color: #34495e;
    border-radius: 0 0 8px 8px;
    padding: 0 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.nav-menu {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
    flex-wrap: wrap;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: block;
    padding: 12px 20px;
    color: white;
    text-decoration: none;
    font-size: 15px;
    transition: background-color 0.3s;
}

.nav-link:hover {
    background-color: #2c3e50;
}

@media (max-width: 768px) {
    .logo { height: 40px; }
    .nav-menu { justify-content: center; }
    .nav-link { padding: 10px 15px; font-size: 14px; }
}