/* ================================
   新井泵浦 - 專業公司網站樣式
   設計：深藍青色漸變，水流意象
   ================================ */

/* ===== CSS 變數 ===== */
:root {
    --color-primary: #0EA5E9;
    --color-primary-dark: #0369A1;
    --color-primary-light: #38BDF8;
    --color-accent: #06B6D4;
    --color-dark: #0F172A;
    --color-dark-2: #1E293B;
    --color-gray: #64748B;
    --color-gray-light: #94A3B8;
    --color-bg: #F8FAFC;
    --color-bg-2: #F1F5F9;
    --color-white: #FFFFFF;
    --gradient-primary: linear-gradient(135deg, #0EA5E9 0%, #0369A1 100%);
    --gradient-primary-light: linear-gradient(135deg, #38BDF8 0%, #0EA5E9 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
    --shadow-primary: 0 8px 30px rgba(14, 165, 233, 0.3);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: 'Noto Sans TC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--color-dark);
    background: var(--color-white);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 導航欄 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom-color: rgba(14, 165, 233, 0.1);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-icon {
    display: flex;
    transition: transform var(--transition);
}

.nav-logo:hover .logo-icon {
    transform: rotate(10deg) scale(1.05);
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-dark);
}

.logo-subtitle {
    font-size: 0.7rem;
    color: var(--color-primary);
    letter-spacing: 2px;
    font-weight: 500;
}

.nav-menu {
    display: flex;
    gap: 36px;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-dark-2);
    position: relative;
    transition: color var(--transition);
    padding: 4px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition);
    border-radius: 2px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 26px;
    height: 3px;
    background: var(--color-dark);
    border-radius: 3px;
    transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
}

/* ===== 語言切換 ===== */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-right: 12px;
}

.lang-switch-btn {
    background: none;
    border: none;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-gray-light);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: all var(--transition);
    font-family: inherit;
}

.lang-switch-btn:hover {
    color: var(--color-primary);
}

.lang-switch-btn.active {
    color: var(--color-primary);
    background: rgba(14, 165, 233, 0.08);
}

.lang-switch-divider {
    font-size: 0.75rem;
    color: var(--color-gray-light);
    user-select: none;
}

/* ===== Hero 首屏 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: linear-gradient(180deg, #F0F9FF 0%, #FFFFFF 50%, #F0F9FF 100%);
    padding-top: 80px;
}

.hero-bg {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
}

.wave-animation {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 320px;
}

.wave {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.wave1 {
    animation: wave-move 8s ease-in-out infinite;
}

.wave2 {
    animation: wave-move 10s ease-in-out infinite reverse;
}

.wave3 {
    animation: wave-move 12s ease-in-out infinite;
}

@keyframes wave-move {
    0%, 100% { transform: translateX(0); }
    50% { transform: translateX(-50px); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 40px 24px;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(14, 165, 233, 0.08);
    border: 1px solid rgba(14, 165, 233, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--color-primary-dark);
    font-weight: 500;
    margin-bottom: 28px;
    animation: fadeInDown 0.8s ease;
}

.badge-icon {
    font-size: 1.1rem;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    line-height: 1.15;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.hero-title-line {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-title-highlight {
    font-size: clamp(1.2rem, 3vw, 2rem);
    font-weight: 500;
    color: var(--color-gray);
    animation: fadeInUp 0.8s ease 0.4s both;
}

.hero-description {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--color-gray);
    line-height: 1.9;
    margin-bottom: 40px;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
    animation: fadeInUp 0.8s ease 0.8s both;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 36px;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 40px rgba(14, 165, 233, 0.4);
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-3px);
}

.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    animation: fadeInUp 0.8s ease 1s both;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-top: 6px;
}

.stat-divider {
    width: 1px;
    height: 50px;
    background: linear-gradient(to bottom, transparent, var(--color-primary-light), transparent);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    font-size: 0.75rem;
    color: var(--color-gray-light);
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow {
    width: 20px;
    height: 20px;
    border-right: 2px solid var(--color-gray-light);
    border-bottom: 2px solid var(--color-gray-light);
    transform: rotate(45deg);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== 區段通用 ===== */
section {
    padding: 100px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 3px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 16px;
}

.section-line {
    width: 60px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 4px;
    margin: 0 auto 20px;
}

.section-subtitle {
    font-size: 1.1rem;
    color: var(--color-gray);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 公司簡介 ===== */
.about {
    background: var(--color-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-text {
    padding-right: 20px;
}

.about-icon-wrapper {
    margin-bottom: 24px;
}

.about-text h3 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.about-founding {
    font-size: 1.1rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 20px;
}

.about-description {
    font-size: 1.05rem;
    color: var(--color-gray);
    line-height: 1.9;
    margin-bottom: 16px;
}

.about-description strong {
    color: var(--color-primary-dark);
    font-weight: 700;
}

.about-features {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

.feature-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(14, 165, 233, 0.08);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-primary-dark);
    transition: all var(--transition);
}

.feature-tag:hover {
    background: var(--color-primary);
    color: var(--color-white);
    transform: translateY(-2px);
}

.about-visual {
    display: flex;
    justify-content: center;
}

.visual-card {
    background: linear-gradient(145deg, #F0F9FF, #E0F2FE);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    transition: transform var(--transition);
}

.visual-card:hover {
    transform: translateY(-8px);
}

.visual-header {
    display: flex;
    gap: 8px;
    padding: 16px;
    background: rgba(255, 255, 255, 0.5);
}

.visual-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.visual-dot.red { background: #EF4444; }
.visual-dot.yellow { background: #F59E0B; }
.visual-dot.green { background: #10B981; }

.visual-body {
    padding: 32px;
    text-align: center;
    background: rgba(255, 255, 255, 0.3);
}

.visual-card-photo .visual-body {
    padding: 16px 16px 24px;
}

.visual-photo-body img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-sm);
    object-fit: contain;
    max-height: 380px;
}

.pump-illustration {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.visual-label {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.label-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
}

.label-sub {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
}

/* ===== 營業項目 ===== */
.products {
    background: var(--color-bg);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--color-white);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition);
    transform-origin: left;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.2);
}

.product-card:hover::before {
    transform: scaleX(1);
}

.product-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #F0F9FF, #E0F2FE);
    border-radius: var(--radius-md);
    transition: all var(--transition);
}

.product-card:hover .product-icon {
    background: var(--gradient-primary-light);
    transform: scale(1.1) rotate(5deg);
}

.product-title {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 12px;
}

.product-desc {
    font-size: 0.9rem;
    color: var(--color-gray);
    line-height: 1.7;
}

/* ===== 產品型錄 ===== */
.catalog {
    background: var(--color-white);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.catalog-item {
    background: var(--color-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border: 2px solid transparent;
    cursor: pointer;
}

.catalog-item:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(14, 165, 233, 0.2);
}

.catalog-image {
    width: 100%;
    height: 220px;
    overflow: hidden;
    background: var(--color-bg);
}

.catalog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.catalog-item:hover .catalog-image img {
    transform: scale(1.05);
}

.catalog-info {
    padding: 20px;
}

.catalog-info h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.catalog-subtitle {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 600;
    margin-bottom: 10px;
}

.catalog-desc {
    font-size: 0.88rem;
    color: var(--color-gray);
    line-height: 1.7;
    margin-bottom: 14px;
}

.catalog-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.catalog-tags span {
    padding: 4px 10px;
    background: var(--color-bg-2);
    border-radius: 20px;
    font-size: 0.75rem;
    color: var(--color-primary-dark);
    font-weight: 500;
}

/* ===== 圖片燈箱 ===== */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    z-index: 2000;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lightbox.active {
    display: flex;
    opacity: 1;
}

.lightbox img {
    max-width: 90%;
    max-height: 80vh;
    object-fit: contain;
    border-radius: 4px;
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
    animation: fadeInUp 0.3s ease;
}

.lightbox-caption {
    color: var(--color-gray-light);
    margin-top: 16px;
    font-size: 1rem;
    text-align: center;
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 2.5rem;
    color: var(--color-white);
    background: none;
    border: none;
    cursor: pointer;
    transition: color var(--transition);
    z-index: 2001;
}

.lightbox-close:hover {
    color: var(--color-primary-light);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 2.5rem;
    color: var(--color-white);
    background: rgba(255, 255, 255, 0.1);
    border: none;
    cursor: pointer;
    padding: 16px 12px;
    transition: background var(--transition);
    border-radius: 4px;
    z-index: 2001;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255, 255, 255, 0.25);
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

/* ===== 核心優勢 ===== */
.advantages {
    background: var(--color-dark);
    color: var(--color-white);
}

.advantages .section-title {
    color: var(--color-white);
}

.advantages .section-subtitle {
    color: var(--color-gray-light);
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 24px;
}

.advantage-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 36px 28px;
    position: relative;
    overflow: hidden;
    transition: all var(--transition);
}

.advantage-card:hover {
    background: rgba(14, 165, 233, 0.1);
    border-color: rgba(14, 165, 233, 0.3);
    transform: translateY(-6px);
}

.advantage-number {
    position: absolute;
    top: 16px;
    right: 20px;
    font-size: 3rem;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.05);
    line-height: 1;
}

.advantage-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--color-white);
}

.advantage-card p {
    font-size: 0.9rem;
    color: var(--color-gray-light);
    line-height: 1.8;
}

/* ===== 聯絡我們 ===== */
.contact {
    background: var(--color-bg);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: stretch;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
    padding: 24px;
    background: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.contact-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
}

.line-card {
    background: linear-gradient(135deg, #06C755, #05a647);
    color: var(--color-white);
    cursor: pointer;
}

.line-card:hover {
    background: linear-gradient(135deg, #05b34f, #04963f);
    transform: translateX(8px) translateY(-2px);
    box-shadow: 0 8px 24px rgba(6, 199, 85, 0.3);
}

.line-card .contact-label,
.line-card .contact-value {
    color: var(--color-white);
}

.line-card .contact-line-sub {
    font-size: 0.8rem;
    opacity: 0.9;
    margin-top: 4px;
}

.line-icon {
    background: rgba(255, 255, 255, 0.2) !important;
    color: white !important;
}

.contact-icon {
    width: 48px;
    height: 48px;
    min-width: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #F0F9FF, #E0F2FE);
    border-radius: var(--radius-sm);
    color: var(--color-primary);
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 0.8rem;
    color: var(--color-gray-light);
    font-weight: 500;
}

.contact-value {
    font-size: 1.05rem;
    color: var(--color-dark);
    font-weight: 600;
}

a.contact-value:hover {
    color: var(--color-primary);
}

.contact-map {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    min-height: 450px;
    background: var(--color-white);
}

.contact-map iframe {
    display: block;
    width: 100%;
    height: 100%;
    min-height: 450px;
}


/* ===== 頁尾 ===== */
.footer {
    background: var(--color-dark);
    color: var(--color-gray-light);
    padding: 64px 0 24px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr;
    gap: 48px;
    margin-bottom: 40px;
}

.footer-brand {
    max-width: 400px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.footer-logo-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-white);
    display: block;
}

.footer-logo-sub {
    font-size: 0.8rem;
    color: var(--color-primary-light);
}

.footer-description {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-gray-light);
}

.footer-links h4,
.footer-contact h4 {
    color: var(--color-white);
    font-size: 1.05rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-links a {
    display: block;
    color: var(--color-gray-light);
    font-size: 0.9rem;
    margin-bottom: 12px;
    transition: all var(--transition);
}

.footer-links a:hover {
    color: var(--color-primary-light);
    transform: translateX(6px);
}

.footer-contact p {
    font-size: 0.9rem;
    margin-bottom: 12px;
    line-height: 1.7;
}

.footer-line {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 4px;
    padding: 8px 16px;
    background: rgba(6, 199, 85, 0.2);
    border-radius: 50px;
    color: var(--color-primary-light);
    font-size: 0.85rem;
    font-weight: 500;
    transition: all var(--transition);
}

.footer-line:hover {
    background: rgba(6, 199, 85, 0.35);
    color: var(--color-white);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 24px;
    text-align: center;
}

.footer-bottom p {
    font-size: 0.85rem;
    color: var(--color-gray);
}

/* ===== 回到頂部 ===== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-primary);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-primary);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--transition);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 36px rgba(14, 165, 233, 0.4);
}

/* ===== 動畫 ===== */
.fade-in {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ===== 響應式設計 ===== */
@media (max-width: 1024px) {
    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-text {
        padding-right: 0;
        text-align: center;
    }

    .about-icon-wrapper {
        display: flex;
        justify-content: center;
    }

    .about-features {
        justify-content: center;
    }

    .catalog-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: 1fr 1fr;
    }

    .footer-brand {
        grid-column: 1 / -1;
    }
}

@media (max-width: 768px) {
    section {
        padding: 64px 0;
    }

    .lang-switch {
        margin-right: auto;
        margin-left: 16px;
        order: -1;
    }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        width: 100%;
        background: var(--color-white);
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        box-shadow: var(--shadow-lg);
        transform: translateY(-150%);
        transition: transform var(--transition);
        border-top: 1px solid rgba(14, 165, 233, 0.1);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .nav-toggle {
        display: flex;
    }

    .hero {
        padding-top: 60px;
    }

    .hero-stats {
        gap: 20px;
    }

    .stat-divider {
        height: 40px;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .products-grid {
        grid-template-columns: 1fr;
    }

    .catalog-grid {
        grid-template-columns: 1fr;
    }

    .advantages-grid {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .contact-map {
        min-height: 300px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 44px;
        height: 44px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .nav-container {
        padding: 12px 16px;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: row;
        gap: 12px;
    }

    .stat-divider {
        height: 30px;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .stat-label {
        font-size: 0.75rem;
    }

    .product-card {
        padding: 28px 20px;
    }

    .scroll-indicator {
        display: none;
    }
}

/* ===== 無障礙 ===== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}

:focus-visible {
    outline: 3px solid var(--color-primary);
    outline-offset: 2px;
    border-radius: 4px;
}