/* Top Performance Vietnam - Modern Professional Website Styles */

/* CSS Reset & Base Styles */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-color: #1a365d;
    --secondary-color: #2c5aa0;
    --accent-color: #e67e22;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    
    /* Text Colors */
    --text-primary: #1f2937;
    --text-secondary: #4e6280;
    --text-light: #6b7280;
    --text-muted: #9ca3af;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-light: #f3f4f6;
    --bg-dark: #111827;
    --bg-green: #ecfdf5;
    
    /* Border & Shadow */
    --border-light: #e5e7eb;
    --border-medium: #d1d5db;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 5rem;
    --spacing-5xl: 6rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-normal: 300ms ease-in-out;
    --transition-slow: 500ms ease-in-out;
    
    /* Z-index */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
}

/* Base Typography */
html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
    overflow-x: hidden;
    width: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
    max-width: 100%;
    touch-action: pan-y;
    overscroll-behavior-x: none;
}

/* Prevent any child from causing horizontal scroll on small screens */
*, *::before, *::after {
    box-sizing: border-box;
}

/* Media should not overflow viewport width */
img, video, canvas, svg {
    max-width: 100%;
    height: auto;
}

/* Typography Elements */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

/* Language-specific typography adjustments */
[lang="en"] .text-content,
[lang="en"] .card-content,
[lang="en"] .description {
    font-size: 0.95rem;
    line-height: 1.5;
}

[lang="vi"] .text-content,
[lang="vi"] .card-content,
[lang="vi"] .description {
    font-size: 0.95rem;
    line-height: 1.6;
}

[lang="ja"] .text-content,
[lang="ja"] .card-content,
[lang="ja"] .description {
    font-size: 0.95rem;
    line-height: 1.6;
}

[lang="ko"] .text-content,
[lang="ko"] .card-content,
[lang="ko"] .description {
    font-size: 0.95rem;
    line-height: 1.6;
}

[lang="zh-CN"] .text-content,
[lang="zh-CN"] .card-content,
[lang="zh-CN"] .description,
[lang="zh-TW"] .text-content,
[lang="zh-TW"] .card-content,
[lang="zh-TW"] .description {
    font-size: 1rem;
    line-height: 1.7;
}

h1 { 
    font-size: var(--font-size-5xl); 
    margin: var(--spacing-lg) 0; 
}
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
    line-height: 1.7;
}

a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.loading-screen.hidden {
    opacity: 0;
    visibility: hidden;
}

.loading-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top: 4px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

.loading-text {
    color: white;
    font-size: var(--font-size-lg);
    font-weight: 500;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Header Styles */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    z-index: var(--z-fixed);
    transition: all var(--transition-normal);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-lg);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

/* Logo Styles */
.logo {
    display: flex;
    align-items: center;
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo-img {
    height: 45px;
    width: auto;
    object-fit: contain;
}

/* Navigation Styles */
.nav-menu-wrapper {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    margin: 0;
    padding: 0;
}

.nav-link {
    font-weight: 500;
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    position: relative;
    white-space: nowrap;
    font-size: var(--font-size-sm);
}

.nav-link:hover {
    color: var(--secondary-color);
    background: rgba(44, 90, 160, 0.1);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--secondary-color);
    transition: width var(--transition-fast);
}

.nav-link:hover::after {
    width: 80%;
}

/* Language Switcher */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* Professional Language Dropdown */
.language-dropdown {
    position: relative;
}

.language-toggle {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 120, 120, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(120, 120, 120, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 120, 120, 0.1) 0%, transparent 50%);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xs) var(--spacing-md);
    cursor: pointer;
    font-size: var(--font-size-xs);
    color: var(--text-primary);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
    min-width: 110px;
}

.language-toggle:hover {
    background: linear-gradient(135deg, #f1f5f9 0%, #cbd5e1 100%);
    background-image: 
        radial-gradient(circle at 20% 80%, rgba(120, 120, 120, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(120, 120, 120, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 120, 120, 0.15) 0%, transparent 50%);
    box-shadow: var(--shadow);
    transform: translateY(-1px);
}

.language-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.language-icon {
    color: var(--secondary-color);
    font-size: 16px;
}

.current-lang {
    font-weight: 500;
    flex: 1;
    text-align: left;
}

.dropdown-arrow {
    color: var(--text-light);
    font-size: 12px;
    transition: transform var(--transition-fast);
}

.language-toggle[aria-expanded="true"] .dropdown-arrow {
    transform: rotate(180deg);
}

.language-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: white;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-dropdown);
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--transition-normal);
    overflow: hidden;
}

.language-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    border-bottom: 1px solid var(--bg-light);
}

.language-option:last-child {
    border-bottom: none;
}

.language-option:hover {
    background: var(--bg-light);
    color: var(--secondary-color);
}

.language-option.active {
    background: linear-gradient(135deg, var(--secondary-color) 0%, var(--primary-color) 100%);
    color: white;
}

.language-option.active:hover {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
}

.lang-name {
    font-weight: 500;
    font-size: var(--font-size-sm);
}

.lang-code {
    font-size: var(--font-size-xs);
    font-weight: 600;
    opacity: 0.8;
}

/* Contact Button */
.contact-btn {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white !important;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-lg);
    font-weight: 600;
    transition: all var(--transition-fast);
    box-shadow: var(--shadow);
    white-space: nowrap;
    font-size: var(--font-size-sm);
}

.contact-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    color: white !important;
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: var(--z-modal);
}

.hamburger-line {
    width: 25px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 3px 0;
    transition: var(--transition-normal);
    border-radius: 2px;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

.mobile-menu-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

/* Mobile Menu Overlay */
.mobile-menu-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-modal-backdrop);
}

.mobile-menu-overlay.active {
    opacity: 1;
    visibility: visible;
}

/* Main Content */
.main-content {
    margin-top: 80px;
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(26, 54, 93, 0.8), rgba(44, 90, 160, 0.6));
}

.hero-container {
    position: relative;
    z-index: 2;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    text-align: center;
    color: white;
}

.hero-content h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    margin-bottom: var(--spacing-xl);
    color: white;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-2xl);
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-xl);
    margin: var(--spacing-3xl) 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    display: block;
    color: white;
    margin-bottom: var(--spacing-sm);
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-lg);
    justify-content: center;
    margin-top: var(--spacing-3xl);
}

/* Buttons */
.btn-primary, .btn-secondary {
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: var(--font-size-lg);
    transition: all var(--transition-fast);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    border: none;
    cursor: pointer;
}

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

.btn-primary:hover {
    background: #d35400;
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
    color: white;
}

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

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

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: var(--spacing-2xl);
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-icon {
    width: 20px;
    height: 30px;
    border: 2px solid white;
    border-radius: 15px;
    position: relative;
}

.scroll-icon::after {
    content: '';
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 6px;
    background: white;
    border-radius: 1px;
    animation: scroll 2s infinite;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
    40% { transform: translateX(-50%) translateY(-10px); }
    60% { transform: translateX(-50%) translateY(-5px); }
}

@keyframes scroll {
    0% { opacity: 1; transform: translateX(-50%) translateY(0); }
    100% { opacity: 0; transform: translateX(-50%) translateY(12px); }
}

/* Section Styles */
.section {
    padding: var(--spacing-3xl) 0;
}

.section.bg-light {
    background: var(--bg-light);
}

.section.bg-green {
    background: var(--bg-green);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* 窄螢幕縮小邊界，為 hCaptcha 等固定寬度元件騰出空間 */
@media (max-width: 640px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    #contact .contact-form-wrapper {
        padding: var(--spacing-xl);
    }
}
@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    #contact .contact-form-wrapper {
        padding: var(--spacing-lg);
    }
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.section-title {
    color: var(--primary-color);
    margin-bottom: var(--spacing-lg);
    position: relative;
    text-align: center;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--accent-color);
    border-radius: 2px;
}

.section-subtitle {
    font-size: var(--font-size-lg);
    color: var(--text-light);
    line-height: 1.6;
}

/* Vietnam Advantage Section */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
}

.advantage-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-lg);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-lg);
    color: white;
    font-size: var(--font-size-2xl);
}

.advantage-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-xl);
}

/* Capabilities Section */
.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
}

.capability-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.capability-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--accent-color), #d35400);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: white;
    font-size: var(--font-size-xl);
}

.capability-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.capability-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.feature-tag {
    background: var(--bg-light);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
    border: 1px solid var(--border-light);
}

/* Certifications Section */
.cert-documents {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
    width: 100%;
}

.cert-doc-card {
    display: block;
    background: #ffffff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: box-shadow var(--transition-normal);
}

.cert-doc-card:hover {
    box-shadow: var(--shadow-xl);
}

.cert-doc-card img {
    width: 100%;
    height: 320px;
    object-fit: contain;
    background: #f8fafc;
    padding: 10px;
    display: block;
}

.cert-doc-caption {
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--primary-color);
    font-weight: 700;
    letter-spacing: 0.02em;
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
}

.cert-compliance-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-2xl);
    width: 100%;
}

.cert-card {
    background: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.cert-logo {
    width: 80px;
    height: auto;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: var(--bg-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.cert-logo img {
    max-width: 58px;
    max-height: 58px;
    object-fit: contain;
}

.cert-fallback {
    font-size: var(--font-size-lg);
    transition: color var(--transition-fast);
}

.cert-card-cpsia .cert-fallback { color: #DC2626; }
.cert-card-astm .cert-fallback { color: #1E40AF; }
.cert-card-cpsc .cert-fallback { color: #7C2D12; }

.cert-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.cert-benefits {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.benefit-tag {
    background: rgba(44, 90, 160, 0.1);
    color: var(--secondary-color);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    font-weight: 500;
}

/* Environmental Section */
.environmental-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-2xl);
    margin-top: var(--spacing-3xl);
}

.env-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.env-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--success-color);
}

.env-logo {
    width: 80px;
    height: auto;
    margin: 0 auto var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.env-logo img {
    max-width: 60px;
    max-height: 60px;
    object-fit: contain;
}

.env-fallback {
    font-size: var(--font-size-lg);
    transition: color var(--transition-fast);
}

/* Individual environmental certification colors to match PNG images */
.env-card:nth-child(1) .env-fallback {
    color: #22C55E; /* FSC - Green */
}

.env-card:nth-child(2) .env-fallback {
    color: #059669; /* CARB - Dark Green */
}

.env-card:nth-child(3) .env-fallback {
    color: #16A34A; /* GREENGUARD - Green */
}

.env-card h3 {
    color: var(--success-color);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-lg);
}

.env-benefits {
    margin-top: var(--spacing-lg);
    text-align: left;
    color: var(--text-secondary);
}

.env-benefits i {
    color: var(--success-color);
    margin-right: var(--spacing-sm);
}

.environmental-benefits {
    text-align: center;
    margin-top: var(--spacing-3xl);
    padding: var(--spacing-2xl);
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
}

/* About Section */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    margin-top: var(--spacing-3xl);
}

.about-image img {
        width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.about-cards {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

.about-card {
    padding: var(--spacing-xl);
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

.about-card:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.about-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-md);
    color: white;
    font-size: var(--font-size-lg);
}

.about-card h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
}

/* Expo Section */
.expo {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    padding: var(--spacing-5xl) 0;
    margin: var(--spacing-4xl) 0;
}

.expo-content {
    margin-top: var(--spacing-3xl);
}

.expo-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-2xl);
    padding: var(--spacing-3xl);
    background: white;
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-light);
    max-width: 1000px;
    margin: 0 auto;
}

.expo-icon {
    flex: 0 0 auto;
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 2rem;
}

.expo-details {
    flex: 1 1 auto;
}

.expo-info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

.expo-info-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.expo-info-item strong {
    color: var(--primary-color);
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.expo-info-item span {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 500;
}

.expo-cta {
    color: var(--secondary-color);
    font-size: 1.1rem;
    font-weight: 500;
    margin-bottom: var(--spacing-xl);
}

.expo-actions {
    display: flex;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.expo-actions .btn {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-lg);
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.expo-actions .btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Products Section */
.products-slider {
    margin-top: var(--spacing-3xl);
    overflow: hidden;
    border-radius: 20px;
}

/* No Products State */
.no-products-section {
    padding: 5rem 2rem;
    text-align: center;
    background: linear-gradient(135deg, 
        rgba(74, 144, 226, 0.95) 0%, 
        rgba(80, 200, 120, 0.95) 100%);
    border-radius: 24px;
    color: white;
    position: relative;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(74, 144, 226, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.no-products-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.05)" stroke-width="1"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    pointer-events: none;
}

.no-products-content {
    position: relative;
    z-index: 1;
}

.no-products-content h3 {
    font-size: 2.5rem;
    margin: 2rem 0 1.5rem;
    font-weight: 700;
    background: linear-gradient(45deg, #ffffff, #f0f8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    line-height: 1.2;
}

.no-products-content p {
    font-size: 1.2rem;
    margin: 1rem 0;
    opacity: 0.95;
    line-height: 1.7;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.no-products-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
    opacity: 0.9;
    background: rgba(255, 255, 255, 0.15);
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
    border: 3px solid rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    animation: glow 2s ease-in-out infinite alternate;
}

@keyframes glow {
    from {
        box-shadow: 0 0 20px rgba(255, 255, 255, 0.2),
                    0 0 40px rgba(74, 144, 226, 0.3);
    }
    to {
        box-shadow: 0 0 30px rgba(255, 255, 255, 0.4),
                    0 0 60px rgba(74, 144, 226, 0.5);
    }
}

.product-intro {
    margin-top: 3rem;
    padding-top: 3rem;
    border-top: 2px solid rgba(255, 255, 255, 0.2);
    position: relative;
}

.product-intro::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.8), transparent);
}

.product-intro p {
    max-width: 700px;
    margin: 1.5rem auto;
    font-size: 1.1rem;
    padding: 1.5rem 2rem;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    transition: all 0.3s ease;
}

.product-intro p:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
}

/* 響應式設計 */
@media (max-width: 1024px) {
    .no-products-section {
        padding: 4rem 2rem;
    }
    
    .no-products-content h3 {
        font-size: 2.2rem;
    }
    
    .product-intro p {
        padding: 1.2rem 1.5rem;
        max-width: 600px;
    }
}

@media (max-width: 768px) {
    /* Expo Section Mobile */
    .expo-card {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-2xl);
    }
    
    .expo-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .expo-info-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .expo-actions {
        justify-content: center;
    }
    
    .no-products-section {
        padding: 3.5rem 1.5rem;
        border-radius: 20px;
    }
    
    .no-products-content h3 {
        font-size: 1.8rem;
        margin: 1.5rem 0 1rem;
    }
    
    .no-products-content p {
        font-size: 1.1rem;
    }
    
    .no-products-icon {
        width: 100px;
        height: 100px;
        font-size: 3.5rem;
        margin-bottom: 1.5rem;
    }
    
    .product-intro {
        margin-top: 2.5rem;
        padding-top: 2.5rem;
    }
    
    .product-intro p {
        padding: 1rem 1.2rem;
        font-size: 1rem;
        margin: 1rem auto;
    }
}

@media (max-width: 480px) {
    .no-products-section {
        padding: 3rem 1rem;
    }
    
    .no-products-content h3 {
        font-size: 1.6rem;
    }
    
    .no-products-icon {
        width: 80px;
        height: 80px;
        font-size: 3rem;
    }
    
    .product-intro p {
        padding: 0.8rem 1rem;
        font-size: 0.95rem;
        border-radius: 12px;
    }
}

.product-card {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all var(--transition-normal);
    border: 1px solid var(--border-light);
}

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

.product-image {
    position: relative;
    overflow: hidden;
    height: 250px;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-overlay {
    position: absolute;
        top: 0;
        left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
        opacity: 0;
    transition: opacity var(--transition-normal);
    }
    
.product-card:hover .product-overlay {
        opacity: 1;
}

.product-btn {
    background: var(--accent-color);
    color: white;
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.product-btn:hover {
    background: #d35400;
    transform: scale(1.05);
}

.product-content {
    padding: var(--spacing-xl);
}

.product-content h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}

.product-code {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    font-family: 'Courier New', monospace;
    background: var(--bg-light);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    display: inline-block;
}

.product-features {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.feature {
    background: var(--bg-light);
    color: var(--text-secondary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* Swiper Customization */
.swiper-button-next,
.swiper-button-prev {
    color: var(--secondary-color);
    background: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    box-shadow: var(--shadow);
    margin-top: -25px;
}

.swiper-button-next::after,
.swiper-button-prev::after {
    font-size: var(--font-size-lg);
    font-weight: 700;
}

.swiper-pagination-bullet {
    background: var(--secondary-color);
    opacity: 0.3;
}

.swiper-pagination-bullet-active {
    opacity: 1;
}

/* Contact Section */
.contact-content {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr); /* minmax(0,1fr) 避免 grid 子項因 min-width:auto 造成 overflow */
    gap: var(--spacing-3xl);
    margin-top: var(--spacing-3xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
    min-width: 0; /* 允許在窄螢幕縮小，避免 grid 子項 min-width:auto 導致 overflow */
}

.contact-card {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    transition: all var(--transition-normal);
}

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

.contact-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
    color: white;
    font-size: var(--font-size-xl);
}

.contact-card h3 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
}

.contact-details p {
    margin-bottom: var(--spacing-sm);
    overflow-wrap: break-word;
    word-break: break-word;
}

/* Contact Form */
.contact-form-wrapper {
    background: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border-light);
    min-width: 0; /* 允許在窄螢幕縮小，避免 grid 子項 min-width:auto 導致 overflow */
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-lg) var(--spacing-md);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
    background: white;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-color);
    box-shadow: 0 0 0 3px rgba(44, 90, 160, 0.1);
}

.form-group label {
    position: absolute;
    top: 50%;
    left: var(--spacing-md);
    transform: translateY(-50%);
    background: white;
    padding: 0 var(--spacing-sm);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    pointer-events: none;
}

.form-group textarea + label {
    top: var(--spacing-lg);
    transform: none;
}

.form-group input:focus + label,
.form-group input:not(:placeholder-shown) + label,
.form-group textarea:focus + label,
.form-group textarea:not(:placeholder-shown) + label {
    top: 0;
    transform: translateY(-50%);
    font-size: var(--font-size-sm);
    color: var(--secondary-color);
}

.submit-btn {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: white;
    padding: var(--spacing-lg) var(--spacing-2xl);
    border: none;
    border-radius: var(--radius-lg);
    font-size: var(--font-size-lg);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-section h4 {
    color: white;
    margin-bottom: var(--spacing-lg);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

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

.footer-section ul li {
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.8);
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.footer-section ul li:hover {
    background: rgba(255, 255, 255, 0.05);
    padding-left: var(--spacing-sm);
}

.footer-section ul li i {
    margin-top: 2px;
    width: 16px;
    flex-shrink: 0;
    color: var(--accent-color);
    font-size: 14px;
}

.footer-section ul li span:first-of-type {
    font-weight: 500;
    color: rgba(255, 255, 255, 0.9);
    margin-right: var(--spacing-xs);
}

.footer-section ul li .contact-info-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

/* 專門為聯繫信息區塊優化 */
.footer-section[data-contact] ul li {
    background: rgba(255, 255, 255, 0.03);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    border-left: 3px solid transparent;
    transition: all var(--transition-normal);
}

.footer-section[data-contact] ul li:hover {
    background: rgba(255, 255, 255, 0.08);
    border-left-color: var(--accent-color);
    transform: translateX(5px);
}

/* 聯繫信息內容區塊樣式優化 */
.footer-section[data-contact] .contact-info-content span:first-child {
    font-weight: 600;
    color: rgba(255, 255, 255, 0.95);
    font-size: 0.9em;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-section[data-contact] .contact-info-content span:last-child {
    color: rgba(255, 255, 255, 0.85);
    font-weight: 400;
    line-height: 1.4;
}

/* 移動設備優化 */
@media (max-width: 768px) {
    .footer-section[data-contact] ul li {
        padding: var(--spacing-md);
        margin-bottom: var(--spacing-md);
    }
    
    .footer-section[data-contact] ul li i {
        font-size: 16px;
        width: 20px;
    }
    
    .footer-section[data-contact] .contact-info-content {
        gap: var(--spacing-sm);
    }
}

/* 為不同聯繫方式添加特殊圖標顏色 */
.footer-section[data-contact] ul li:nth-child(1) i {
    color: #10B981; /* 電話 - 綠色 */
}

.footer-section[data-contact] ul li:nth-child(2) i {
    color: #3B82F6; /* Email - 藍色 */
}

.footer-section[data-contact] ul li:nth-child(3) i {
    color: #EF4444; /* 地址 - 紅色 */
}

.footer-section[data-contact] ul li:nth-child(4) i {
    color: #8B5CF6; /* 網站 - 紫色 */
}

.footer-section a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-section a:hover {
    color: white;
}

.footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: var(--spacing-lg);
    object-fit: contain;
}

.social-links {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--accent-color);
    transform: translateY(-2px);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    padding-top: var(--spacing-xl);
}

.footer-bottom-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.6);
}

.footer-links {
    display: flex;
    gap: var(--spacing-lg);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: var(--font-size-sm);
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 50px;
    height: 50px;
    background: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
}

/* Simple modal overlay */
.modal-overlay { 
    position: fixed; inset: 0; background: rgba(0,0,0,.45); 
    opacity: 0; visibility: hidden; transition: all var(--transition-normal); 
    z-index: var(--z-modal);
}
.modal-overlay.show { opacity: 1; visibility: visible; }
.modal { transform: translateY(20px); transition: transform var(--transition-normal); }
.modal-overlay.show .modal { transform: translateY(0); }

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

.back-to-top:hover {
    background: var(--primary-color);
    transform: translateY(-2px);
}

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes zoomIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantage-grid,
    .capabilities-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }
    
    .contact-content {
        grid-template-columns: minmax(0, 1fr);
        gap: var(--spacing-2xl);
    }
}

/* Narrow Screen Navigation Adjustments */
@media (max-width: 1200px) {
    .nav-link {
        font-size: var(--font-size-xs);
        padding: 2px var(--spacing-xs);
    }
    
    .nav-menu {
        gap: var(--spacing-xs);
    }
    
    .nav-menu-wrapper {
        gap: var(--spacing-sm);
    }
    
    .language-toggle {
        min-width: 90px;
        padding: 2px var(--spacing-xs);
        font-size: 11px;
    }
    
    .contact-btn {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-xs);
    }
}

@media (max-width: 1000px) {
    .nav-link {
        font-size: 11px;
        padding: 1px 2px;
    white-space: nowrap;
    }
    
    .nav-menu {
        gap: 2px;
    }
    
    .nav-menu-wrapper {
        gap: 4px;
    }
    
    .language-toggle {
        min-width: 70px;
        padding: 2px 4px;
        font-size: 10px;
    }
    
    .contact-btn {
        padding: 3px 6px;
        font-size: 11px;
        white-space: nowrap;
    }
}

@media (max-width: 950px) {
    /* Force mobile menu at this width */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu-wrapper {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--spacing-2xl);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        z-index: var(--z-fixed);
        box-shadow: var(--shadow-lg);
        overflow-y: auto;
    }
    
    .nav-menu-wrapper.active {
        transform: translateX(0);
    }
    
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-2xl);
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        font-size: var(--font-size-lg);
        padding: var(--spacing-md);
        font-weight: 500;
        white-space: normal;
    }
    
    .nav-actions {
        flex-direction: column;
        gap: var(--spacing-lg);
        width: 100%;
    }
    
    .language-dropdown {
        order: -1;
        margin-bottom: var(--spacing-md);
    }
    
    .language-toggle {
        width: 100%;
        justify-content: center;
        min-width: auto;
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    .contact-btn {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-lg);
        font-weight: 600;
    }
}

@media (max-width: 850px) {
    /* Additional mobile optimizations */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu-wrapper {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--spacing-2xl);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        z-index: var(--z-fixed);
        box-shadow: var(--shadow-lg);
        overflow-y: auto;
    }
    
    .nav-menu-wrapper.active {
        transform: translateX(0);
    }
    
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-2xl);
        width: 100%;
        text-align: center;
    }
    
    .nav-link {
        font-size: var(--font-size-lg);
        padding: var(--spacing-md);
        font-weight: 500;
    }
    
    .nav-actions {
        flex-direction: column;
        gap: var(--spacing-lg);
        width: 100%;
    }
    
    .language-dropdown {
        order: -1;
        margin-bottom: var(--spacing-md);
    }
    
    .language-toggle {
        width: 100%;
        justify-content: center;
        min-width: auto;
        padding: var(--spacing-md);
        font-size: var(--font-size-base);
    }
    
    .contact-btn {
        padding: var(--spacing-md) var(--spacing-xl);
        font-size: var(--font-size-lg);
        font-weight: 600;
    }
}

@media (max-width: 768px) {
    /* Mobile Navigation */
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu-wrapper {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        height: calc(100vh - 80px);
        background: white;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        padding: var(--spacing-2xl);
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
        z-index: var(--z-modal);
        overflow-y: auto;
    }
    
    .nav-menu-wrapper.active {
        transform: translateX(0);
    }
    
    .nav-menu {
        flex-direction: column;
        gap: var(--spacing-lg);
        margin-bottom: var(--spacing-2xl);
        width: 100%;
        text-align: center;
    }
    
    .nav-actions {
        flex-direction: column;
        gap: var(--spacing-lg);
        width: 100%;
    }
    
    .language-dropdown {
        order: -1;
        margin-bottom: var(--spacing-md);
    }
    
    .language-toggle {
        width: 100%;
        justify-content: center;
    }
    
    .mobile-menu-overlay {
        display: block;
    }
    
    /* Hero adjustments */
    .hero-content h1 {
        font-size: clamp(2rem, 8vw, 3rem);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
    
    .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
    
    /* Grid adjustments */
    .advantage-grid,
    .capabilities-grid,
    .cert-documents,
    .cert-compliance-grid,
    .environmental-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
    
    /* Section padding */
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .container {
        padding: 0 var(--spacing-md);
    }
    
    /* Footer adjustments */
    .footer-bottom-content {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero-stats {
        grid-template-columns: 1fr;
    }
    
    .stat-item {
        padding: var(--spacing-lg);
    }
    
    .language-menu {
        position: fixed;
        top: auto;
        bottom: 80px;
        left: var(--spacing-md);
        right: var(--spacing-md);
        width: auto;
        min-width: auto;
    }
    
    .contact-btn {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: var(--font-size-base);
    }
}

/* Print Styles */
@media print {
    .header,
    .mobile-menu-toggle,
    .mobile-menu-overlay,
    .back-to-top,
    .contact-form,
    .swiper-button-next,
    .swiper-button-prev,
    .swiper-pagination {
        display: none !important;
    }
    
    .main-content {
        margin-top: 0;
    }
    
    .section {
        page-break-inside: avoid;
    }
    
    * {
        color: black !important;
        background: white !important;
    }
}

/* Accessibility Improvements */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* High contrast mode */
@media (prefers-contrast: high) {
    :root {
        --text-primary: #000000;
        --text-secondary: #333333;
        --border-light: #000000;
        --shadow: 0 0 0 1px #000000;
    }
}

/* Product Modal Styles */
.feature-tag {
    display: inline-block;
    padding: 4px 12px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 500;
    margin: 2px;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.feature-tag:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

/* Product Card Simplified Styles */
.product-content h3 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 8px 0 4px 0;
    line-height: 1.3;
}

.product-content .product-code {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 精選產品詳情內的商品照片區塊（Swiper：桌面 grid、手機 圓點分頁+無限循環） */
#productModal .product-modal-photos {
    overflow: visible;
}

#productModal .product-modal-swiper {
    overflow: hidden;
}

#productModal .product-modal-swiper .gallery-item {
    height: 100%;
    min-height: 140px;
}

/* 圓點分頁：手機顯示、桌面隱藏（由 breakpoints 動態切換） */
#productModal .product-modal-pagination {
    display: none;
    margin-top: 14px;
}
#productModal .product-modal-pagination .swiper-pagination-bullet {
    width: 8px;
    height: 8px;
    background: #999;
    opacity: 0.5;
    transition: opacity 0.2s, background 0.2s;
}
#productModal .product-modal-pagination .swiper-pagination-bullet-active {
    background: var(--accent-color);
    opacity: 1;
}

/* ≤640px：顯示圓點、固定高度、橫向滑動、填滿寬度、圓點緊貼圖片下方 */
@media (max-width: 640px) {
    #productModal .product-modal-photos {
        margin: 0 -20px;
    }
    #productModal .product-modal-swiper {
        height: 220px;
        padding-bottom: 36px;
        position: relative;
    }
    #productModal .product-modal-swiper .swiper-slide {
        height: 100%;
    }
    #productModal .product-modal-swiper .gallery-item {
        min-height: unset;
        border-radius: 0;
        aspect-ratio: unset;
    }
    #productModal .product-modal-pagination {
        display: block !important;
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        text-align: center;
        margin-top: 0;
    }
    #productModal .product-modal-pagination .swiper-pagination-bullet {
        width: 10px;
        height: 10px;
        margin: 0 5px;
    }
}

/* ===== NEW SECTIONS: About Hero, Who We Serve, Craft, Testing, Workplace, Product Types ===== */
.about-hero-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-2xl);
    align-items: center;
    margin-bottom: var(--spacing-2xl);
}
.about-factory-image img {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    object-fit: cover;
}
.about-lead-text p {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
    color: var(--text-secondary);
}

.who-we-serve .section-header { margin-bottom: var(--spacing-2xl); }
.who-we-serve-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 980px;
    margin: 0 auto;
}
.who-card {
    background: var(--bg-primary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--border-light);
}
.who-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}
.who-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}
.who-card h4 { margin-bottom: var(--spacing-sm); font-size: 1.125rem; }
.who-card p { font-size: 0.9375rem; color: var(--text-secondary); line-height: 1.5; }

.craft-section { background: var(--bg-secondary); }
.craft-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}
.craft-category {
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--border-light);
}
.craft-category h4 {
    margin-bottom: var(--spacing-md);
    color: var(--primary-color);
    font-size: 1.125rem;
}
.media-strip {
    display: grid;
    grid-auto-flow: column;
    grid-auto-columns: minmax(180px, 220px);
    gap: var(--spacing-sm);
    overflow-x: auto;
    padding-bottom: 6px;
    scroll-snap-type: x mandatory;
}
.media-strip::-webkit-scrollbar {
    height: 8px;
}
.media-strip::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 99px;
}
.media-strip img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: var(--radius-md);
    scroll-snap-align: start;
    transition: transform 0.2s;
}
.media-strip img:hover { transform: scale(1.02); }

.testing-content { margin-bottom: var(--spacing-xl); }
.testing-lead {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto;
}
.testing-gallery {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    max-width: 900px;
    margin: 0 auto;
}
.testing-gallery img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: transform 0.2s;
}
.testing-gallery img:hover { transform: scale(1.02); }

.workplace-content { margin-bottom: var(--spacing-xl); }
.workplace-lead {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--text-secondary);
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
}
.workplace-commitments {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}
.workplace-commit {
    text-align: center;
    padding: var(--spacing-lg);
}
.workplace-commit i {
    font-size: 2.5rem;
    color: var(--secondary-color);
    margin-bottom: var(--spacing-md);
}
.workplace-commit h4 { margin-bottom: var(--spacing-sm); }
.workplace-commit p { font-size: 0.9375rem; color: var(--text-secondary); }
.workplace-gallery {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    max-width: 980px;
    margin: 0 auto;
}
.workplace-gallery img {
    width: 100%;
    height: 220px;
    object-fit: cover;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
}

.product-gallery-section .section-header {
    margin-bottom: var(--spacing-xl);
}
.gallery-group {
    margin-top: var(--spacing-xl);
}
.gallery-group h4 {
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-lg);
}
.media-strip-product {
    grid-auto-columns: minmax(170px, 210px);
}

@media (max-width: 992px) {
    .about-hero-block { grid-template-columns: 1fr; }
    .who-we-serve-grid { grid-template-columns: 1fr; }
    .craft-grid { grid-template-columns: 1fr; }
    .cert-documents { grid-template-columns: 1fr; }
    .cert-compliance-grid { grid-template-columns: 1fr; }
    .testing-gallery { grid-template-columns: 1fr; }
    .workplace-commitments { grid-template-columns: 1fr; }
    .workplace-gallery { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .who-we-serve-grid { grid-template-columns: 1fr; }
    .testing-gallery { grid-template-columns: 1fr; }
}

/* =========================================================
   Craft & Product Gallery enhancement (incremental styles)
   ========================================================= */

/* Craft cards (replace old horizontal strips) */
.craft-grid-modern {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-lg);
}

.craft-card {
    background: #fff;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.craft-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.craft-card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-light);
    background: #fff;
}

.craft-card-desc {
    margin: 0;
    padding: 0 var(--spacing-md) var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.55;
}

.craft-card-header h4 {
    margin: 0;
    color: var(--primary-color);
    font-size: var(--font-size-lg);
}

.craft-icon {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: #fff;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 0.875rem;
    flex-shrink: 0;
}

.craft-swiper {
    width: 100%;
    aspect-ratio: 16 / 10;
    min-height: 180px;
    max-height: 400px;
    background: var(--bg-light);
}

.craft-swiper .swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Keep craft slider controls compact to avoid conflicting with global Swiper style */
.craft-swiper .swiper-button-next,
.craft-swiper .swiper-button-prev {
    width: 34px;
    height: 34px;
    margin-top: -17px;
    background: rgba(26, 54, 93, 0.82);
    color: #fff;
    border-radius: 999px;
    box-shadow: none;
    opacity: 0;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.craft-swiper .swiper-button-next::after,
.craft-swiper .swiper-button-prev::after {
    font-size: 12px;
    font-weight: 700;
}

.craft-card:hover .swiper-button-next,
.craft-card:hover .swiper-button-prev {
    opacity: 1;
}

.craft-swiper .swiper-pagination-bullet {
    background: #fff;
    opacity: 0.6;
}

.craft-swiper .swiper-pagination-bullet-active {
    background: var(--accent-color);
    opacity: 1;
}

/* Product categories tabbed gallery */
.product-gallery-tabs {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
    margin: var(--spacing-sm) 0 var(--spacing-xl);
}

.gallery-tab {
    border: 1px solid var(--border-medium);
    background: #fff;
    color: var(--text-secondary);
    border-radius: 999px;
    padding: 0.55rem 1rem;
    font-size: var(--font-size-sm);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.gallery-tab:hover {
    border-color: var(--secondary-color);
    color: var(--secondary-color);
}

.gallery-tab.active {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
    color: #fff;
    border-color: transparent;
    box-shadow: var(--shadow);
}

.product-gallery-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--spacing-md);
    align-items: stretch;
}

.gallery-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    min-height: 160px;
    box-shadow: var(--shadow);
    background: #fff;
    cursor: zoom-in;
    aspect-ratio: 4 / 3;
}

.gallery-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform var(--transition-slow);
}

.gallery-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    background: linear-gradient(to top, rgba(17, 24, 39, 0.5), rgba(17, 24, 39, 0.15));
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.gallery-item:hover img {
    transform: scale(1.06);
}

.gallery-item:hover .gallery-overlay {
    opacity: 1;
}

/* Scroll-lock class – prevents background scroll while lightbox is open */
html.lightbox-scroll-lock,
html.lightbox-scroll-lock body {
    overflow: hidden !important;
    overscroll-behavior: none;
    /* Keep position static so scroll offset is preserved naturally */
}

/* Lightbox for product gallery */
.lightbox-overlay {
    position: fixed;
    inset: 0;
    z-index: 2000;
    background: rgba(0, 0, 0, 0.92);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    overscroll-behavior: contain;
    touch-action: none;
}

.lightbox-overlay.active {
    display: flex;
}

.lightbox-content {
    max-width: min(1180px, 96vw);
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
}

.lightbox-image {
    max-width: 100%;
    max-height: 90vh;
    border-radius: var(--radius-md);
    box-shadow: 0 22px 60px rgba(0, 0, 0, 0.45);
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
    will-change: transform;
    transform-origin: center center;
    cursor: grab;
}

.lightbox-image:active {
    cursor: grabbing;
}

.lightbox-close {
    position: absolute;
    top: 16px;
    right: 22px;
    width: 42px;
    height: 42px;
    border: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.18);
    color: #fff;
    font-size: 1.65rem;
    line-height: 1;
    cursor: pointer;
    z-index: 2001;
}

.lightbox-close:hover {
    background: rgba(255, 255, 255, 0.28);
}

/* Lightbox navigation arrows */
.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border: 0;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #fff;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 2001;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.25s ease;
    opacity: 0.7;
}
.lightbox-prev { left: 16px; }
.lightbox-next { right: 16px; }
.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255, 255, 255, 0.3);
    opacity: 1;
    transform: translateY(-50%) scale(1.1);
}
.lightbox-prev:active,
.lightbox-next:active {
    transform: translateY(-50%) scale(0.95);
}

.lightbox-counter {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    z-index: 2001;
    pointer-events: none;
    user-select: none;
}

@media (max-width: 600px) {
    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }
    .lightbox-prev { left: 8px; }
    .lightbox-next { right: 8px; }
    .lightbox-counter { bottom: 14px; font-size: 0.78rem; }
}

/* Zoom hint on mobile */
@media (pointer: coarse) {
    .lightbox-image {
        cursor: zoom-in;
    }
}

@media (max-width: 1200px) {
    .product-gallery-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

@media (max-width: 992px) {
    .craft-grid-modern {
        grid-template-columns: 1fr;
    }
    /* Single-column craft cards can get very wide – cap the aspect ratio */
    .craft-swiper {
        aspect-ratio: 16 / 9;
        max-height: 420px;
    }
    .product-gallery-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .product-gallery-grid {
        grid-template-columns: 1fr;
    }
    .craft-swiper {
        aspect-ratio: 4 / 3;
        min-height: 200px;
        max-height: none;
    }
    .gallery-item {
        aspect-ratio: 4 / 3;
        min-height: 200px;
    }
}