* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.4);
}

.logo {
    margin-left: 20px;
}

.logo img {
    display: block;
    width: 130px;
    height: 60px;
}

nav ul {
    list-style: none;
    display: flex;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: #FFD400;
    text-decoration: none;
    font-size: 18px;
    padding: 5px 10px;
    transition: color 0.3s ease;
}

/* 悬停效果 */
nav ul li a:hover {
    color: #FF5400;
}

/* 选中状态 */
nav ul li a.active {
    color: #FF5400; /* 选中的菜单项颜色（例如金色） */
    font-weight: bold;
    border-bottom: 3px solid #FFDFB7;
}