/* =========================================
   CSS 變數參數化設計
========================================= */
:root {
    --color-brown:          #40220f; /* 深咖啡色 */
    --color-brown-light:    #6a3906; /* 淺咖啡色 */
    --color-gold:           #ffd700; /* 金色 */
    --color-white:          #ffffff; /* 純白色 */
    --color-black:          #000000; /* 純黑色 */
    --color-dark-blue:      #0f172a; /* 深藍色 */
    --color-cream:          #fffdf5; /* 奶油色/米白色 */
    --color-cream-dark:     #f2ebd9; /* 深奶油色/淺沙色 */
    --color-text-main:      #2c241b; /* 深棕灰色 */
    --color-text-sub:       #5d554a; /* 灰褐色 */

    --radius-sm:            0.5rem;
    --radius-md:            1rem;
    --radius-lg:            2rem;

    --ease-brand:           cubic-bezier(.25, .46, .45, .94); 
    --duration-fast:        0.2s;
    --duration-normal:      0.4s;
    --transition-base:      all var(--duration-normal) var(--ease-brand);

    --glass-shadow:         0 12px 40px rgba(0, 51, 102, 0.08);
}

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

img, video, iframe, canvas {
    display: block;
    max-width: 100%;
    height: auto;
}

/* =========================================
   圖片載入失敗佔位符 (Image Fallback / Placeholder)
========================================= */
img {
    position: relative;
    color: transparent; 
}

img::before {
    content: attr(alt);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-cream-dark); /* 預留區底色 */
    color: var(--color-text-sub);              /* 提示文字顏色 */
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: capitalize; /* 讓英文首字母自動大寫 */
    border: 2px dashed #d5c8a8; /* 用優雅的虛線框標示這是圖片預留區 */
    border-radius: inherit;     /* 圓角自動跟隨外框 (如 var(--radius-md)) */
    box-sizing: border-box;
    text-align: center;
    padding: 1rem;
    z-index: 2;
}

/* 確保預設的破圖圖示被徹底遮蓋 */
img::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-cream-dark);
    z-index: 1;
}

body {
    font-family: "Roboto", "Helvetica Neue", "Inter", "PingFang TC", "Microsoft JhengHei", sans-serif;
    color: var(--color-text-main);
    background: var(--color-cream);
    line-height: 1.6;
}

body.menu-open {
    overflow: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 auto;
}

/* =========================================
   導航列 (Primary Navigation)
========================================= */
.primary-nav {
    position: fixed;
    top: 0;
    z-index: 1000;
    width: 100%;
    background-color: transparent;
    transition: background-color var(--duration-normal) var(--ease-brand), 
                box-shadow var(--duration-normal) var(--ease-brand);
}

.primary-nav.scrolled {
    background: var(--color-brown);
    box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.15);
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: clamp(0.75rem, 3vw, 1rem) 1.25rem;
}

.logo img {
    height: clamp(2rem, 5vw, 2.75rem);
}

/* 防止視窗縮放時觸發過場動畫閃爍 */
body.resize-animation-stopper .nav-links,
body.resize-animation-stopper .icon-bar {
    transition: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-links a {
    color: var(--color-white);
    font-weight: 500;
    font-size: 1.05rem;
    position: relative;
    padding: 0.5rem 0;
    text-shadow: 0 0 1px rgba(255,255,255,0.8);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-gold);
    transition: width 0.3s ease;
}

.nav-links a:hover::after {
    width: 100%;
}

.primary-nav.scrolled .nav-links a:hover {
    color: var(--color-gold);
}

/* =========================================
   漢堡按鈕與全螢幕選單
========================================= */
.menu-toggle {
    display: none;
    padding: 0.5rem;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 1002; 
    margin-right: 0.5rem; 
}

.icon-bar {
    display: block;
    width: 1.5rem;
    height: 3px;
    margin: 5px 0;
    background: var(--color-white);
    border-radius: 2px;
    transition: transform var(--duration-fast) ease-in-out, opacity var(--duration-fast) ease-in-out;
}

.menu-toggle.active .icon-bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}
.menu-toggle.active .icon-bar:nth-child(2) {
    opacity: 0;
}
.menu-toggle.active .icon-bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

@media (max-width: 48rem) {
    .menu-toggle { display: block; }
    .logo { position: absolute; left: 50%; transform: translateX(-50%); }
    
    .nav-links {
        position: fixed;
        top: 0; left: 0;
        width: 100vw; height: 100vh;
        background-color: var(--color-brown);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        z-index: 1001; 
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.5s ease, visibility 0.5s ease;
    }

    .nav-links.active {
        opacity: 1;
        visibility: visible;
    }
    
    .nav-links a {
        font-size: clamp(1.5rem, 5vw, 2rem); 
        padding: 0.75rem 0;
    }
}

/* =========================================
   Hero Section
========================================= */
.hero-section {
    position: relative;
    width: 100%;
    background-color: var(--color-cream);
}

.hero-img {
    width: 100%;
	height: auto;
    aspect-ratio: 1920 / 700;
    object-fit: cover;
}

.notice-bar {
    width: 100%;
    background-color: #a0522d; 
    color: var(--color-white);
    padding: 1rem 0;
}

.notice-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 0 1rem;
}

.notice-tag {
    background-color: var(--color-gold);
    color: var(--color-brown);
    padding: 0.2rem 0.6rem;
    border-radius: 4px;
    font-weight: 700;
    
    /* 防止在手機版被擠壓與換行 */
    flex-shrink: 0;      
    white-space: nowrap; 
}

/* 針對公告文字的細節設定 */
.notice-text {
    line-height: 1.5;
    text-align: left;
}

/* 手機版RWD */
@media (max-width: 48rem) {
    .hero-section { 
        padding-top: 4rem; 
        background-color: var(--color-brown); 
        
        /* 確保內部元素在手機版乖乖由上往下排好，絕不重疊 */
        display: flex;
        flex-direction: column;
    }
    
    .hero-img { 
        min-height: auto;
    }

    /* 手機版多行公告時，讓黃色標籤對齊第一行文字的頂部會更好看 */
    .notice-content {
        align-items: flex-start;
    }
    .notice-tag {
        margin-top: 3px;
    }
}

/* =========================================
   Content Section
========================================= */
.content-section { 
    padding: 2rem 3rem; 
}

.section-heading {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    position: relative;
    text-align: center;
    color: var(--color-brown);
}
.section-heading::after {
    content: ''; 
    display: block; 
    width: 60px; 
    height: 4px;
    background-color: var(--color-gold); 
    margin: 0.5rem auto 0; 
    border-radius: 2px;
}
.section-context {
    text-align: center;
    color: #a0522d;
    font-size: 1.5rem;
    margin-bottom: 3rem;
}

/* Grid 基礎設定 */
.bento-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

/* 外層：處理 GSAP 動畫初始狀態 */
.bento-item {
    display: block;
    opacity: 0; 
    transform: translateY(30px);
}

/* 內層 Article：垂直排列，上圖下文 */
.bento-item article {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    border: 1px solid rgba(64, 34, 15, 0.05);
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.bento-item:hover article {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(64, 34, 15, 0.15);
}

/* --- 圖片區塊 --- */
.bento-img-wrapper {
    width: 100%;
    aspect-ratio: 16 / 9;
    overflow: hidden;
    position: relative;
}

.bento-img-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.bento-item:hover .bento-img-wrapper img {
    transform: scale(1.05);
}

/* --- 內容文字區塊 --- */
.bento-content { 
    padding: 2rem; 
    display: flex; 
    flex-direction: column; 
    flex-grow: 1; 
}

.bento-title {
    font-size: 1.4rem;
    color: var(--color-brown);
    margin-bottom: 0.75rem;
}

.bento-desc {
    font-size: 1rem;
    color: var(--color-text-sub);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.bento-link {
    font-weight: 700;
    color: var(--color-brown-light);
    display: inline-block;
    transition: transform 0.3s ease, color 0.3s ease;
}

.bento-item:hover .bento-link {
    color: var(--color-gold);
    transform: translateX(5px);
}

/* --- RWD --- */
@media (min-width: 48rem) {
    .bento-grid {
        /* 平板尺寸：一行 2 個 */
        grid-template-columns: repeat(2, 1fr);
        padding: 0 1.5rem;
    }
}

@media (min-width: 64rem) {
    .bento-grid {
        /* 電腦尺寸：一行 3 個 */
        grid-template-columns: repeat(3, 1fr);
        padding: 0 1.5rem;
    }
}

/* =========================================
   Floating UI (FAB & Back To Top)
========================================= */
.side-fab-group {
	position: fixed;
	right: 1.25rem;
	bottom: 1.875rem; 
	display: flex;
	flex-direction: column;
	gap: 1rem;
	z-index: 998;
	align-items: flex-end; 
	opacity: 0;
	visibility: hidden;
	transform: translateY(20px);
	transition: all var(--duration-normal) ease;
}

.side-fab-group.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.fab-item {
    display: flex;
    align-items: center;
    justify-content: flex-end; 
    width: 3rem; height: 3rem;
    padding: 0 0.75rem; 
    background: var(--color-gold); 
    color: var(--color-brown);
    box-shadow: 0 0.25rem 0.5rem rgba(0, 0, 0, 0.4);
    border-radius: 2rem; 
    cursor: pointer; border: none;
    overflow: hidden; white-space: nowrap;
    transition: width 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275), background-color var(--duration-normal) ease;
}

.fab-item svg {
	width: 1.5rem;
	height: 1.5rem;
	flex-shrink: 0;
	transition: transform 0.3s ease;
}

.fab-item::before {
	content: attr(title);
	margin-right: 0.75rem;
	font-size: 0.95rem;
	font-weight: 600;
	opacity: 0;
	transform: translateX(10px);
	transition: all 0.3s ease;
}

.back-to-top {
    fill: none;
    stroke: currentColor;
    stroke-width: 2.5;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* --- RWD --- */
@media (min-width: 48rem) {
	.fab-item:hover {
		width: 9rem;
		background-color: #ffe066;
	}

	.fab-item:hover::before {
		opacity: 1;
		transform: translateX(0);
		transition-delay: 0.1s;
	}

	/* BackToTop 不延展寬度 */
	.fab-item.back-to-top:hover {
		width: 3rem;
		background-color: #ffe066;
		transform: translateY(-4px);
	}

	.fab-item.back-to-top::before {
		display: none;
	}
}

@media (max-width: 48rem) {
	.fab-item {
		width: 2.75rem;
		height: 2.75rem;
		justify-content: center;
		padding: 0;
	}

	.fab-item::before {
		display: none;
	}

	.side-fab-group {
		bottom: 1.25rem;
		right: 0.9375rem;
	}
}

/* =========================================
   Footer
========================================= */
footer {
	background-color: var(--color-brown);
	color: var(--color-white);
	padding-top: 1rem;
}

.footer-grid {
	display: grid;
	grid-template-columns: 1fr 300px;
	gap: 3rem;
	padding-bottom: 1rem;
	align-items: start;
}

.footer-heading {
	color: var(--color-gold);
	font-size: 1.25rem;
	margin-bottom: 1.5rem;
}

.footer-contact p {
	margin-bottom: 0.8rem;
	color: rgba(255, 255, 255, 0.9);
}

.nhi-logo-wrapper {
	margin-top: 1rem;
	display: inline-block;
}

.footer-bottom {
	background-color: rgba(0, 0, 0, 0.2);
	padding: 1rem 0;
}

.copyright-row {
	display: flex;
	justify-content: space-between;
	align-items: center;
	font-size: 0.9rem;
	color: rgba(255, 255, 255, 0.6);
}

/* --- RWD 響應式設定 --- */
@media (max-width: 48rem) {
	.footer-grid {
		grid-template-columns: 1fr;
		gap: 2.5rem;
		text-align: center;
	}

	.copyright-row {
		flex-direction: column;
		gap: 0.5rem;
	}
}