.back-to-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    transition: 0.5s;
    z-index: 99;
}


/*** Button Start ***/
.btn {
    font-weight: 600;
    transition: .5s;
}

.btn.btn-light {
    color: var(--frontend-theme);
    border: none;
}

    .btn.btn-light:hover {
        color: var(--bs-white);
        background: var(--frontend-theme);
    }


/*** Topbar Start ***/ 
/*** Topbar End ***/


/*** Navbar Start ***/
/*=============================================
  原版 - 白色背景導航列 (預設)
=============================================*/
.nav-bar {
    background: var(--bs-white);
    transition: 0.3s;
}

.navbar-light .navbar-brand img {
    max-height: 60px;
    transition: .5s;
}

.nav-bar .navbar-light .navbar-brand img {
    max-height: 88px;
}

.navbar .navbar-nav .nav-item .nav-link {
    padding: 0;
}

.navbar .navbar-nav .nav-link {
    font-size: 15px;
    font-weight: 500;
}

.navbar .navbar-nav .nav-item {
    display: flex;
    align-items: center;
    padding: 15px;
}

.navbar-light .navbar-nav .nav-item:hover,
.navbar-light .navbar-nav .nav-item.active,
.navbar-light .navbar-nav .nav-item:hover .nav-link,
.navbar-light .navbar-nav .nav-item.active .nav-link {
    color: var(--frontend-theme);
    font-weight: 770; 
    text-decoration: underline;
    text-underline-offset: 6px; /* 底線離文字距離 */
    text-decoration-thickness: 3px; /* 底線粗細 */
}

@media (max-width: 991px) {
    .navbar {
        padding: 10px 0;
    }

    .navbar .navbar-nav .nav-link {
        padding: 0;
    }

    .navbar .navbar-nav .nav-item {
        display: flex;
        padding: 10px;
        flex-direction: column;
        justify-content: start;
        align-items: start;
    }

    .navbar .navbar-nav {
        width: 100%;
        display: flex;
        margin-top: 20px;
        padding-bottom: 20px;
        background: var(--bs-light);
        border-radius: 10px;
    }

        /* 手機選單限制高度可滾動 */
        .navbar .navbar-collapse {
            max-height: calc(100vh - 120px);
            overflow-y: auto;
            overscroll-behavior: contain;
            -webkit-overflow-scrolling: touch;
        }

    .navbar.navbar-expand-lg .navbar-toggler {
        padding: 8px 15px;
        border: 1px solid var(--frontend-theme);
        color: var(--frontend-theme);
    }
}

/* v20260325-003: 導覽列/下拉選單字體一致 */
@media (min-width: 992px) {
    .navbar {
        padding: 10px 0;
    }

    .navbar .navbar-nav {
        width: 100%;
        display: flex;
        justify-content: space-evenly;
        align-items: center;
        background: #fff;
        border-radius: 10px;
    }

    .navbar .nav-item .dropdown-menu:not(.frontend-dropdown-menu) {
        display: block;
        visibility: hidden;
        top: 100%;
        transform: rotateX(-75deg);
        transform-origin: 0% 0%;
        transition: .5s;
        opacity: 0;
    }

    .navbar .nav-item:hover .dropdown-menu:not(.frontend-dropdown-menu) {
        transform: rotateX(0deg);
        visibility: visible;
        margin-top: 20px;
        transition: .5s;
        opacity: 1;
    }
}

/*=============================================
  透明版-導航列
=============================================*/
.nav-bar.nav-bar-transparent {
    background: transparent;
    position: fixed;
    top: 0px;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: background 0.3s ease;
}

/* 透明版 - 滾動後變白色背景 */
.nav-bar.nav-bar-transparent.scrolled {
    background: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

/* 透明版 - 頁面頂部時白色文字 */
.nav-bar.nav-bar-transparent .navbar-light .nav-link {
    color: rgba(255, 255, 255, 0.95) !important;
    font-weight: 500;
    font-size: 18px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.nav-bar.nav-bar-transparent .navbar-light .nav-link:hover,
.nav-bar.nav-bar-transparent .navbar-light .nav-link.active {
    color: #ffffff !important;
}

.nav-bar.nav-bar-transparent .navbar-light .navbar-nav .nav-item:hover,
.nav-bar.nav-bar-transparent .navbar-light .navbar-nav .nav-item.active,
.nav-bar.nav-bar-transparent .navbar-light .navbar-nav .nav-item:hover .nav-link,
.nav-bar.nav-bar-transparent .navbar-light .navbar-nav .nav-item.active .nav-link {
    color: #ffffff !important;
    font-weight: 770;
    transform: translateY(-1px) scale(1.03);
    text-shadow: 0 0 12px rgba(0,0,0,.18);
    text-decoration: underline;
    text-underline-offset: 6px;
    text-decoration-thickness: 3px;
}

/* 透明版 - 滾動後文字變色 */
.nav-bar.nav-bar-transparent.scrolled .navbar-light .nav-link {
    color: #000 !important;
    text-shadow: none;
}

.nav-bar.nav-bar-transparent.scrolled .navbar-light .nav-link:hover,
.nav-bar.nav-bar-transparent.scrolled .navbar-light .nav-link.active {
    color: var(--frontend-theme) !important;
}

.nav-bar.nav-bar-transparent.scrolled .navbar-light .navbar-nav .nav-item:hover,
.nav-bar.nav-bar-transparent.scrolled .navbar-light .navbar-nav .nav-item.active,
.nav-bar.nav-bar-transparent.scrolled .navbar-light .navbar-nav .nav-item:hover .nav-link,
.nav-bar.nav-bar-transparent.scrolled .navbar-light .navbar-nav .nav-item.active .nav-link {
    color: var(--frontend-theme) !important;
    text-shadow: none;
}

/* 透明版 - 漢堡選單按鈕（頁面頂部白色） */
.nav-bar.nav-bar-transparent .navbar-light .navbar-toggler {
    border-color: rgba(255, 255, 255, 0.7);
}

.nav-bar.nav-bar-transparent .navbar-light .navbar-toggler .fa-bars {
    color: #ffffff;
}

/* 透明版 - 滾動後漢堡選單按鈕變綠色 */
.nav-bar.nav-bar-transparent.scrolled .navbar-light .navbar-toggler {
    border-color: var(--frontend-theme);
}

.nav-bar.nav-bar-transparent.scrolled .navbar-light .navbar-toggler .fa-bars {
    color: var(--frontend-theme);
}

/* 透明版 - 手機版 */
@media (max-width: 991px) {
    .nav-bar.nav-bar-transparent .navbar .navbar-nav {
        background: var(--frontend-theme);
    }

    .nav-bar.nav-bar-transparent .navbar.navbar-expand-lg .navbar-toggler {
        border: 1px solid rgba(255, 255, 255, 0.7);
        color: #ffffff;
    }

    /* 手機版滾動後 */
    .nav-bar.nav-bar-transparent.scrolled .navbar .navbar-nav {
        background: var(--bs-light);
    }

    .nav-bar.nav-bar-transparent.scrolled .navbar.navbar-expand-lg .navbar-toggler {
        border: 1px solid var(--frontend-theme);
        color: var(--frontend-theme);
    }
}

/* 透明版 - 桌面版 */
@media (min-width: 992px) {
    .nav-bar.nav-bar-transparent .navbar .navbar-nav {
        background: transparent;
    }

    /* 桌面版滾動後下拉選單 */
}
/*** Navbar End ***/


/*** copyright Start ***/
.copyright {
    background: var(--frontend-theme);
    border-top: 1px solid rgba(255, 255, 255, .08);
}
/*** copyright end ***/


/*--------------------------------------------------------------
# Robot_service button
--------------------------------------------------------------*/
/* bottom-to-top */
/*a.move-top {
    width: 100px;
    height: 100px;*/  
    /*background: url(../img/p-a.png) no-repeat center #fff;
    background-size: cover;
    display: inline-block;
    position: fixed;
    bottom: 13%;
    right: 2%;
    z-index: 999;
    -webkit-border-radius: 50%;
    -o-border-radius: 50%;
    -ms-border-radius: 50%;
    -moz-border-radius: 50%;
    border-radius: 50%;
    border: 3px solid #fff;
}*/

.transparent {
    opacity: 0.9;
}