/* ===== 全域設定 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* 主色調 */
    --primary-color: #1e3a5f;        /* 深藍 - 水的沉穩 */
    --secondary-color: #d4af37;      /* 金色 - 尊貴 */
    --accent-color: #4a90e2;         /* 亮藍 - 清新 */
    --water-blue: #5dade2;           /* 水藍 */
    
    /* 中性色 */
    --white: #ffffff;
    --light-gray: #f8f9fa;
    --medium-gray: #e9ecef;
    --dark-gray: #495057;
    --black: #212529;
    
    /* 功能色 */
    --success: #28a745;
    --warning: #ffc107;
    --danger: #dc3545;
    
    /* 字體 */
    --font-primary: 'Noto Sans TC', sans-serif;
    --font-serif: 'Noto Serif TC', serif;
    
    /* 間距 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 3rem;
    --spacing-xl: 4rem;
    
    /* 圓角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 陰影 */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
    --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.25);
}

body {
    font-family: var(--font-primary);
    color: var(--black);
    line-height: 1.7;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== 導航列 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(30, 58, 95, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-md);
}

.navbar.scrolled {
    background: rgba(30, 58, 95, 1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.nav-brand h1 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--white);
    margin: 0;
}

.nav-brand .tagline {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin: 0;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-menu a {
    color: var(--white);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: var(--secondary-color);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width 0.3s ease;
}

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

.nav-menu .cta-btn {
    background: linear-gradient(135deg, var(--secondary-color), #f4d03f);
    color: var(--primary-color);
    padding: 0.6rem 1.5rem;
    border-radius: 25px;
    font-weight: 700;
}

.nav-menu .cta-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(212, 175, 55, 0.4);
}

.nav-menu .cta-btn::after {
    display: none;
}

/* ===== 主視覺 Banner ===== */
.hero-banner {
    height: 100vh;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.9), rgba(74, 144, 226, 0.8)),
                url('https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1600') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    margin-top: 0;
}

.hero-overlay {
    width: 100%;
    text-align: center;
}

.hero-content {
    animation: fadeInUp 1s ease;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.title-main {
    font-family: var(--font-serif);
    font-size: 4rem;
    font-weight: 900;
    color: var(--white);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
}

.title-sub {
    font-size: 2rem;
    color: var(--secondary-color);
    font-weight: 700;
}

.hero-description {
    font-size: 1.3rem;
    color: var(--white);
    margin: 2rem 0;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    margin: 3rem 0;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 4rem;
    margin-top: 4rem;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--secondary-color);
    font-family: var(--font-serif);
}

.stat-label {
    font-size: 1.1rem;
    color: var(--white);
    margin-top: 0.5rem;
}

/* ===== 按鈕樣式 ===== */
.btn {
    display: inline-block;
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 50px;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--secondary-color), #f4d03f);
    color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(212, 175, 55, 0.4);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(212, 175, 55, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: var(--white);
}

.btn-white {
    background: var(--white);
    color: var(--primary-color);
}

.btn-white:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-small {
    padding: 0.6rem 1.5rem;
    font-size: 0.95rem;
}

.btn-large {
    padding: 1.2rem 3rem;
    font-size: 1.2rem;
}

/* ===== 區塊標題 ===== */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-family: var(--font-serif);
    font-size: 2.8rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--dark-gray);
}

/* ===== 情緒價值區 ===== */
.why-section {
    padding: 6rem 0;
    background: var(--light-gray);
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.scenario-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.scenario-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.scenario-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.scenario-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-weight: 700;
}

.scenario-story {
    color: var(--dark-gray);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.scenario-benefit {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.benefit-tag {
    background: var(--accent-color);
    color: var(--white);
    padding: 0.4rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* ===== FOMO 緊急感區 ===== */
.urgency-banner {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    padding: 3rem 0;
    color: var(--white);
}

.urgency-content h2 {
    font-size: 2.5rem;
    font-weight: 900;
    text-align: center;
    margin-bottom: 2rem;
    color: var(--white);
}

.urgency-items {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 2rem;
}

.urgency-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.1);
    padding: 1.5rem 2rem;
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.urgency-icon {
    font-size: 2.5rem;
}

.urgency-item p {
    font-size: 1.1rem;
    margin: 0;
}

.urgency-item strong {
    color: var(--secondary-color);
    font-size: 1.3rem;
}

/* ===== 優勢區塊 ===== */
.advantages-section {
    padding: 6rem 0;
}

.advantage-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 6rem;
}

.advantage-block.right {
    direction: rtl;
}

.advantage-block.right > * {
    direction: ltr;
}

.advantage-number {
    font-size: 6rem;
    font-weight: 900;
    color: var(--secondary-color);
    opacity: 0.3;
    font-family: var(--font-serif);
    line-height: 1;
    margin-bottom: 1rem;
}

.advantage-content h3 {
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.advantage-story {
    color: var(--dark-gray);
    line-height: 1.9;
    font-size: 1.1rem;
}

.advantage-story p {
    margin-bottom: 1.2rem;
}

.story-highlight {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-color);
}

.story-emphasis {
    background: linear-gradient(120deg, rgba(212, 175, 55, 0.1) 0%, rgba(212, 175, 55, 0.2) 100%);
    padding: 1.5rem;
    border-left: 4px solid var(--secondary-color);
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-style: italic;
}

.advantage-features {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--light-gray);
    padding: 1.5rem;
    border-radius: var(--radius-md);
}

.feature-icon {
    font-size: 2.5rem;
}

.feature-item h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.3rem;
}

.feature-item p {
    color: var(--dark-gray);
    margin: 0;
}

/* 水質差異比較 */
.water-difference {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-top: 2rem;
}

.diff-card {
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.diff-card.bad {
    background: linear-gradient(135deg, #f5f5f5, #e0e0e0);
    border: 2px solid #ccc;
}

.diff-card.good {
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border: 2px solid var(--accent-color);
}

.diff-card h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
}

.diff-card ul {
    list-style: none;
    padding: 0;
}

.diff-card li {
    padding: 0.5rem 0;
    color: var(--dark-gray);
}

/* 客製化選項 */
.customization-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin-top: 2rem;
}

.custom-item {
    background: var(--white);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.custom-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.custom-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.custom-item h4 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.custom-item p {
    color: var(--dark-gray);
    margin: 0;
}

/* 圖片佔位符 */
.image-placeholder {
    width: 100%;
    background: linear-gradient(135deg, var(--medium-gray), var(--light-gray));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 0;
    box-shadow: var(--shadow-md);
    overflow: hidden;
    position: relative;
}
}

.image-placeholder p {
    color: var(--dark-gray);
    font-size: 1.1rem;
    line-height: 1.8;
}

/* 圖片樣式 - 確保不變形不破版 */
.image-placeholder img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* 南投山水 & 客製化圖 - 正方形 */
.advantage-img-1,
.advantage-img-2 {
    aspect-ratio: 1/1;
}

/* 成功案例圖 - 超寬橫幅 */
.case-img {
    aspect-ratio: 12/5;
}

/* 公司形象照 - 直立 */
.about-img {
    aspect-ratio: 4/5;
}

.advantage-img-1 {
    background: linear-gradient(135deg, rgba(93, 173, 226, 0.2), rgba(46, 213, 115, 0.2));
}

.advantage-img-2 {
    background: linear-gradient(135deg, rgba(255, 195, 113, 0.2), rgba(244, 208, 63, 0.2));
}

.case-study-banner {
    margin-top: 4rem;
}

.case-img {
    height: 400px;
    background: linear-gradient(135deg, rgba(212, 175, 55, 0.2), rgba(244, 208, 63, 0.2));
}

/* ===== 商品方案 ===== */
.products-section {
    padding: 6rem 0;
    background: var(--light-gray);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.price-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    box-shadow: var(--shadow-md);
    position: relative;
    transition: all 0.3s ease;
}

.price-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.price-card.featured {
    border: 3px solid var(--secondary-color);
    transform: scale(1.05);
}

.price-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: var(--accent-color);
    color: var(--white);
    padding: 0.5rem 1.5rem;
    border-radius: 20px;
    font-weight: 700;
    font-size: 0.9rem;
}

.price-badge.hot {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    animation: pulse 2s infinite;
}

.price-card h3 {
    font-size: 1.8rem;
    color: var(--primary-color);
    margin: 1rem 0;
    font-weight: 700;
}

.price-amount {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin: 1.5rem 0;
}

.currency {
    font-size: 1.2rem;
    color: var(--dark-gray);
}

.amount {
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--primary-color);
    font-family: var(--font-serif);
    margin: 0 0.3rem;
}

.unit {
    font-size: 1.2rem;
    color: var(--dark-gray);
}

.price-total {
    text-align: center;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.save-label {
    text-align: center;
    color: var(--success);
    font-weight: 700;
    margin-bottom: 1.5rem;
}

.price-features {
    list-style: none;
    padding: 0;
    margin: 2rem 0;
}

.price-features li {
    padding: 0.8rem 0;
    border-bottom: 1px solid var(--medium-gray);
    color: var(--dark-gray);
}

.price-card .btn {
    width: 100%;
    margin-top: 1rem;
}

/* 大量訂購優惠 */
.bulk-discount {
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-top: 3rem;
}

.bulk-discount h3 {
    font-size: 2rem;
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 2rem;
}

.discount-table {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.discount-row {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1.5fr 1.5fr;
    gap: 1rem;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    background: var(--light-gray);
    align-items: center;
}

.discount-row.header {
    background: var(--primary-color);
    color: var(--white);
    font-weight: 700;
}

.discount-row > div {
    text-align: center;
}

.discount-row .save {
    color: var(--success);
    font-weight: 700;
    font-size: 1.1rem;
}

.discount-note {
    text-align: center;
    margin-top: 2rem;
    font-size: 1.1rem;
    color: var(--dark-gray);
}

/* ===== 年底送禮 Banner ===== */
.gift-banner {
    position: relative;
    height: 400px;
    margin: 4rem 0;
}

.gift-img {
    height: 100%;
    margin: 0;
    background: linear-gradient(135deg, rgba(231, 76, 60, 0.2), rgba(212, 175, 55, 0.2));
}

.gift-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(30, 58, 95, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
}

.gift-overlay .container {
    text-align: center;
    color: var(--white);
}

.gift-overlay h2 {
    font-size: 2.5rem;
    font-weight: 900;
    margin-bottom: 1rem;
}

.gift-overlay p {
    font-size: 1.3rem;
    margin-bottom: 2rem;
}

/* ===== 運費說明 ===== */
.shipping-section {
    padding: 6rem 0;
    background: var(--white);
}

.shipping-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.shipping-card {
    background: var(--light-gray);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.shipping-card.free {
    background: linear-gradient(135deg, #d4edda, #c3e6cb);
    border: 2px solid var(--success);
}

.shipping-card.paid {
    background: linear-gradient(135deg, #fff3cd, #ffeeba);
    border: 2px solid var(--warning);
}

.shipping-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.shipping-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.shipping-areas {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin: 1.5rem 0;
}

.area-tag {
    background: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    color: var(--primary-color);
}

.shipping-desc {
    font-size: 1.1rem;
    color: var(--dark-gray);
    margin: 1rem 0;
}

.shipping-example {
    font-size: 0.95rem;
    color: var(--dark-gray);
    font-style: italic;
}

.shipping-note {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: var(--radius-md);
    border-left: 4px solid var(--accent-color);
}

.shipping-note p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.shipping-note ul {
    margin-left: 2rem;
    color: var(--dark-gray);
}

.shipping-note li {
    margin: 0.5rem 0;
}

.note-highlight {
    color: var(--warning);
    font-weight: 700;
}

/* ===== 訂購流程 ===== */
.process-section {
    padding: 6rem 0;
    background: var(--light-gray);
}

.process-steps {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.step-item {
    flex: 1;
    min-width: 150px;
    text-align: center;
    position: relative;
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 900;
    margin: 0 auto 1rem;
}

.step-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.step-item h3 {
    font-size: 1.2rem;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.step-item p {
    color: var(--dark-gray);
    font-size: 0.95rem;
    line-height: 1.6;
}

.step-arrow {
    font-size: 2rem;
    color: var(--accent-color);
    font-weight: 700;
}

.process-note {
    text-align: center;
    margin-top: 3rem;
    font-size: 1.1rem;
    color: var(--dark-gray);
}

/* ===== 關於我們 ===== */
.about-section {
    padding: 6rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-description {
    font-size: 1.1rem;
    color: var(--dark-gray);
    line-height: 1.9;
    margin-bottom: 1.5rem;
}

.about-values {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 3rem;
}

.value-item {
    background: var(--light-gray);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    text-align: center;
}

.value-item h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
}

.value-item p {
    color: var(--dark-gray);
    margin: 0;
}

.about-img {
    height: 600px;
    background: linear-gradient(135deg, rgba(30, 58, 95, 0.2), rgba(74, 144, 226, 0.2));
}

/* 認證標章 */
.certifications {
    margin-top: 4rem;
    text-align: center;
}

.certifications h3 {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 2rem;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.cert-item {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.cert-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.cert-item p {
    color: var(--dark-gray);
    font-weight: 600;
    margin: 0;
}

/* ===== 訂購表單 ===== */
.order-section {
    padding: 6rem 0;
    background: var(--light-gray);
}

.order-form {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.form-group {
    margin-bottom: 2rem;
}

.form-group label {
    display: block;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 2px solid var(--medium-gray);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-primary);
    transition: border 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.form-notice {
    background: var(--light-gray);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
}

.form-notice p {
    margin: 0.5rem 0;
    color: var(--dark-gray);
}

/* ===== 聯絡我們 ===== */
.contact-section {
    padding: 6rem 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.contact-card {
    background: var(--light-gray);
    padding: 3rem 2rem;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.contact-card h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.contact-info {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--accent-color);
    margin: 1rem 0;
}

.contact-time {
    color: var(--dark-gray);
    font-size: 0.95rem;
}

/* ===== Footer ===== */
.footer {
    background: var(--primary-color);
    color: var(--white);
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand h3 {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--secondary-color);
}

.footer-links h4,
.footer-contact h4 {
    margin-bottom: 1rem;
}

.footer-links ul {
    list-style: none;
}

.footer-links a {
    color: var(--white);
    text-decoration: none;
    line-height: 2;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--secondary-color);
}

.footer-contact p {
    line-height: 2;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.7);
}

/* ===== 匯款資訊彈窗 ===== */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    animation: fadeIn 0.3s ease;
}

.modal-content {
    background-color: var(--white);
    margin: 5% auto;
    padding: 0;
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    animation: slideDown 0.4s ease;
}

.close-modal {
    color: var(--dark-gray);
    float: right;
    font-size: 2rem;
    font-weight: bold;
    cursor: pointer;
    padding: 1rem;
    transition: color 0.3s ease;
}

.close-modal:hover {
    color: var(--danger);
}

.modal-header {
    background: linear-gradient(135deg, var(--success), #20c997);
    color: var(--white);
    padding: 2rem;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    text-align: center;
}

.modal-header h2 {
    margin: 0 0 0.5rem 0;
    font-size: 2rem;
}

.modal-body {
    padding: 2rem;
}

.payment-info {
    background: var(--light-gray);
    padding: 2rem;
    border-radius: var(--radius-md);
    margin-bottom: 2rem;
}

.payment-item {
    display: flex;
    justify-content: space-between;
    padding: 1rem 0;
    border-bottom: 1px solid var(--medium-gray);
}

.payment-item:last-child {
    border-bottom: none;
}

.payment-label {
    font-weight: 600;
    color: var(--dark-gray);
}

.payment-value {
    font-weight: 700;
    color: var(--primary-color);
}

.payment-item.highlight {
    background: rgba(74, 144, 226, 0.1);
    padding: 1rem;
    border-radius: var(--radius-sm);
}

.payment-item.total {
    background: rgba(212, 175, 55, 0.2);
    padding: 1rem;
    border-radius: var(--radius-sm);
    font-size: 1.2rem;
}

.payment-notice {
    background: #fff3cd;
    border-left: 4px solid var(--warning);
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    margin-bottom: 2rem;
}

.payment-notice p {
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.payment-notice ul {
    margin-left: 1.5rem;
    margin-top: 1rem;
}

.payment-notice li {
    margin: 0.5rem 0;
}

.payment-actions {
    display: flex;
    gap: 1rem;
}

.payment-actions .btn {
    flex: 1;
}

/* ===== 返回頂部按鈕 ===== */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: var(--primary-color);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    font-weight: 900;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
}

/* ===== 動畫 ===== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

/* ===== 響應式設計 ===== */
@media (max-width: 1024px) {
    .advantage-block {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .title-main {
        font-size: 2.5rem;
    }
    
    .title-sub {
        font-size: 1.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .urgency-items {
        flex-direction: column;
    }
    
    .water-difference {
        grid-template-columns: 1fr;
    }
    
    .customization-options {
        grid-template-columns: 1fr;
    }
    
    .pricing-grid {
        grid-template-columns: 1fr;
    }
    
    .process-steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .about-values {
        grid-template-columns: 1fr;
    }
    
    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .discount-row {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .discount-row > div {
        text-align: left;
    }
    
    .shipping-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }
    
    .section-header h2 {
        font-size: 2rem;
    }
    
    .btn {
        padding: 0.8rem 1.5rem;
        font-size: 1rem;
    }
}