body, html {
    margin: 0;
    padding: 0;
}

.header-image {
    width: 100%;
    height: auto;
    display: block;
}
.header-img-container {
    width: 100%;
    overflow: hidden;
    position: relative;
}

.container {
    display: flex;
    flex-direction: column;
}

.justified-text {
    text-align: justify;
    /* 设置文字两端对齐 */
}

/* 导航栏样式 */
.navbar {
    background-color: #006699;
    display: flex;
    justify-content: center;
    padding: 0;
    margin-top: 0;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* 导航栏内部容器 */
.navbar-container {
    display: flex;
    justify-content: center;
    align-items: center;
    font-weight: bold;
    flex-wrap: wrap;
}

.navbar a {
    font-size: 20px;
    color: white;
    text-align: center;
    padding: 18px 35px;
    text-decoration: none;
    display: block;
    transition: background-color 0.3s ease, transform 0.2s ease;
    white-space: nowrap;
}

.navbar a:hover,
.dropdown:hover .dropbtn {
    background-color: #005F8B;
    transform: translateY(-2px);
}

/* 下拉菜单容器 */
.dropdown {
    position: relative;
    display: inline-block;
}

/* 下拉菜单按钮 */
.dropdown .dropbtn {
    font-weight: bold;
    font-size: 20px;
    border: none;
    outline: none;
    color: white;
    padding: 18px 35px;
    background-color: inherit;
    font-family: inherit;
    margin: 0;
    display: block;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.2s ease;
    white-space: nowrap;
}

/* 隐藏的下拉菜单内容 */
.dropdown-content {
    display: none;
    position: absolute;
    background-color: #005F8B;
    min-width: 200px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.3);
    z-index: 1;
    border-radius: 0 0 8px 8px;
}

/* 下拉菜单中的链接 */
.dropdown-content a {
    float: none;
    color: white;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    text-align: left;
    position: relative;
    padding-left: 30px;
    font-size: 18px;
    transition: background-color 0.3s ease, padding-left 0.3s ease;
}

/* 添加小圆点和缩进 */
.dropdown-content a:before {
    content: '•\00a0\00a0';
    position: absolute;
    left: 10px;
    color: white;
}

/* 悬停时改变下拉链接的背景色 */
.dropdown-content a:hover {
    background-color: #004070;
    padding-left: 35px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.title {
    font-weight: bold;
}