/* 基本樣式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    position: relative;
    z-index: 999;
}

.navbar {
    display: flex;
    align-items: center;
    justify-content: space-evenly;
    padding: 0;
    flex-wrap: wrap;
}

.logo {
    margin: 20px 0;
}

.logo img,
.phone24hr img {
    width: 300px;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
}

.nav-menu {
    width: 100%;
    display: flex;
    list-style: none;
    gap: 20px;
    justify-content: center;
    background-color: #00417d;
    padding: 20px 0;
}

.nav-item,
.dropdown {
    position: relative;
}

.nav-link {
    text-decoration: none;
    color: #fff;
    font-size: 16px;
    transition: all 0.3s;
    white-space: nowrap;
}

/* 滑鼠滑過或點選主選單 */
.nav-link:hover,
.nav-link:active,
.nav-link.active {
    color: #000;
    background-color: #ffc700;
}


.nav-link:hover .dropdown-toggle-icon,
.nav-link:active .dropdown-toggle-icon,
.nav-link.active .dropdown-toggle-icon {
    color: #000;
}

/* 保留 hover 樣式在 nav-link 上，當 dropdown 整體被 hover */
.nav-item.dropdown:hover>.nav-link {
    background-color: #ffc700;
    color: #000;
}

.nav-item.dropdown:hover .dropdown-toggle-icon {

    color: #000;
}

.nav-item.active>.nav-link {
    background-color: #ffc700;
    color: #000;
}

.nav-item.active .dropdown-toggle-icon {
    color: #000;
}

/* 當前頁面：加上 active 時改變文字與箭頭顏色 */
/* .nav-link.active {
    color: #fff;
    background-color: #002e5b;
    font-weight: bold;
}

.nav-link.active .dropdown-toggle-icon {
    color: #fff;
} */

/* 向下箭頭icon */
.dropdown-toggle-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

.dropdown-toggle-icon {
    cursor: pointer;
    font-size: 14px;
    color: #fff;
    transition: color 0.3s;
}

/* 下拉選單動畫 */
/* .dropdown-menu {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 0;
    position: absolute;
    background: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    list-style: none;
    padding: 0;
    margin-top: 8px;
    z-index: 1000;
    min-width: 10em;
    防止文字換行 
    white-space: nowrap;
} */
.nav-item.dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
    padding: 10px 0;
    z-index: 1000;
    min-width: 10em;
    white-space: nowrap;
    opacity: 0;

}

/* hover 時觸發展開動畫 */
.nav-item.dropdown:hover .dropdown-menu {
    display: block;
    opacity: 1;
    transition: opacity 0.6s ease;
}


.dropdown-menu li a {
    padding: 10px 15px;
    text-decoration: none;
    color: #333;
    display: block;
}

.dropdown-menu li a:hover {
    background-color: #00417d;
    color: #fff;
}

@media (max-width: 1200px) {
    .nav-menu {
        gap: 0;
    }
}

/* --- 小於 1440px：手機版樣式 --- */
@media (max-width: 992px) {
    .navbar {
        justify-content: space-around;
        /* padding: 10px 20px; */
    }

    .phone24hr {
        display: none;
    }

    .menu-toggle {
        display: block;
    }
    .nav-item {
        width: 100%;
    }

    .nav-link {
        padding: 10px 20px;
        width: 100%;
    }

    .nav-menu {
        display: none;
        flex-direction: column;
        width: 100%;
        margin-top: 10px;
    }

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

    .dropdown-menu {
        position: static;
        box-shadow: none;
        padding-left: 16px;
    }

    .dropdown-menu.show {
        /* 給一個足夠大的值即可 */
        max-height: 500px;
        opacity: 1;
    }

    .dropdown-menu li a{
        padding: 0;
    }
    .dropdown-menu li a:hover{
        background-color: #fff;
        color: #00417d;
        font-weight: 700;
    }
    .dropdown-toggle-link {
        display: flex;
        justify-content: space-between;
        align-items: center;
        width: 100%;
        /* 撐滿整個 li */
        box-sizing: border-box;
        /* 確保 padding 不超出寬度 */
    }
}

/* --- 小於 400px：手機版樣式 --- */
@media (max-width: 500px) {
    .logo img {
        width: 200px;
    }
}