/* ========================================
   About Us Page - Premium Design with Images
   ======================================== */

/* Hero Section with Background Image */
.about-hero {
    position: relative;
    min-height: calc(100vh - 110px); /* 减去 header 高度 */
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.about-hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.about-hero-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.9) 0%, rgba(30, 41, 59, 0.85) 100%);
    z-index: 1;
}

.about-hero-inner {
    position: relative;
    z-index: 2;
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
    padding: 120px var(--spacing-lg) 80px;
}



.about-hero-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.about-hero-desc {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-2xl);
}

/* Hero Stats - Enhanced with Icons */
.about-hero-stats {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin-top: var(--spacing-lg);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: rgba(255, 220, 100, 0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 220, 100, 0.2);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
    cursor: default;
}

.stat-item:hover {
    background: rgba(255, 220, 100, 0.15);
    border-color: rgba(255, 220, 100, 0.3);
    transform: translateY(-4px);
}

.stat-icon-wrapper {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    border-radius: var(--radius-lg);
    flex-shrink: 0;
}

.stat-icon-wrapper i {
    font-size: 1.5rem;
    color: #fff;
}

.stat-content {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.stat-num {
    font-size: 2.25rem;
    font-weight: 700;
    color: #fff;
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.75);
    margin-top: 6px;
    max-width: 140px;
    line-height: 1.4;
}

.stat-divider {
    width: 1px;
    height: 60px;
    background: rgba(255, 255, 255, 0.15);
    align-self: center;
}

/* Quick Navigation */
.about-quick-nav {
    background: var(--bg-base);
    border-bottom: 1px solid var(--border-default);
}

.quick-nav-inner {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) 0;
    overflow-x: auto;
    scrollbar-width: none;
}

.quick-nav-inner::-webkit-scrollbar { display: none; }

.quick-nav-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--text-secondary);
    white-space: nowrap;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.quick-nav-item:hover,
.quick-nav-item.active {
    color: var(--primary);
    background: var(--primary-light);
}

.quick-nav-item i { font-size: 14px; }

/* Main Content */
.about-main { 
    background: var(--bg-base);
}

.about-main .container {
    max-width: 1400px;
    padding-left: var(--spacing-2xl);
    padding-right: var(--spacing-2xl);
}

@media (max-width: 1024px) {
    .about-main .container {
        padding-left: var(--spacing-lg);
        padding-right: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .about-main .container {
        padding-left: var(--spacing-md);
        padding-right: var(--spacing-md);
    }
}

/* Section Base */
.about-section {
    padding: 100px 0;
    border-bottom: 1px solid var(--border-default);
    scroll-margin-top: 80px;
}

/* Override smooth scroll for instant anchor navigation */
html:has(.about-main) {
    scroll-behavior: auto;
}

.about-section.section-alt { background: var(--bg-secondary); }

/* Section Grid with Image */
.section-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-grid.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-grid-reverse { direction: rtl; }
.section-grid-reverse > * { direction: ltr; }

/* Section Content */
.section-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    background: var(--primary);
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 700;
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-size: var(--font-size-section-title);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.section-lead {
    font-size: var(--font-size-section-lead);
    color: var(--primary);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.section-text {
    margin-bottom: var(--spacing-xl);
}

.section-text p {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
}

.section-text p:last-child { margin-bottom: 0; }

/* Section Image */
.section-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-wrapper img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    display: block;
}

.image-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-xl);
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, transparent 100%);
}

.overlay-content { text-align: left; }

.overlay-year {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.overlay-text {
    display: block;
    font-size: var(--font-size-sm);
    color: rgba(255,255,255,0.8);
    margin-top: 4px;
}

.image-badge {
    position: absolute;
    bottom: var(--spacing-lg);
    left: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 16px;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-md);
    color: #fff;
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.image-badge i {
    color: var(--primary);
}

.image-badge-gold {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
}

.image-badge-gold i { color: #fff; }

.image-stats {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.stat-circle {
    width: 120px;
    height: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(255,255,255,0.95);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-xl);
    text-align: center;
}

.stat-circle-dark {
    background: rgba(15, 23, 42, 0.95);
}

.stat-circle .stat-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.stat-circle .stat-label {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 4px;
}

.stat-circle-dark .stat-label { color: rgba(255,255,255,0.7); }

/* Section Highlights */
.section-highlights {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 500;
}

.highlight-item i {
    color: var(--success);
    font-size: 16px;
}


/* Capability Grid */
.capability-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.capability-item {
    text-align: center;
    padding: var(--spacing-md);
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
}

.capability-num {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.capability-unit {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-left: 2px;
}

.capability-label {
    display: block;
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
    margin-top: 4px;
}

/* ========================================
   Production Strength Section - Enhanced
   ======================================== */

/* Production Stats Row */
.production-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.production-stat-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    transition: all var(--transition-fast);
}

.production-stat-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.production-stat-num {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.production-stat-unit {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-left: 4px;
}

.production-stat-label {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

/* Production Lines Section */
.production-lines {
    margin-bottom: var(--spacing-2xl);
}

.production-lines-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

.production-lines-title i {
    color: var(--primary);
}

/* ========================================
   Carousel Component - Shared Styles
   ======================================== */

.carousel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.carousel-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.carousel-title i {
    color: var(--primary);
}

.carousel-nav {
    display: flex;
    gap: var(--spacing-sm);
}

.carousel-btn {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-btn:hover {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.carousel-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.carousel-btn:disabled:hover {
    background: var(--bg-base);
    border-color: var(--border-default);
    color: var(--text-secondary);
}

.carousel-container {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-xl);
}

.carousel-track {
    display: flex;
    transition: transform 0.4s ease;
}

.carousel-slide {
    flex: 0 0 calc(50% - var(--spacing-md));
    margin-right: var(--spacing-md);
}

/* Override global carousel-slide styles from style.css */
#production-lines-carousel .carousel-slide,
#factory-gallery-carousel .carousel-slide {
    position: relative;
    display: block;
    opacity: 1;
    visibility: visible;
    min-height: auto;
    width: auto;
    transform: none;
    top: auto;
    left: auto;
}

.carousel-slide:last-child {
    margin-right: 0;
}

/* Carousel Dots */
.carousel-dots {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: var(--radius-full);
    background: var(--border-default);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot:hover {
    background: var(--text-secondary);
}

.carousel-dot.active {
    background: var(--primary);
    width: 28px;
}

/* Production Line Card */
.production-line-card {
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-fast);
    cursor: pointer;
    height: 100%;
}

.production-line-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.production-line-image {
    position: relative;
    height: 520px;
    overflow: hidden;
}

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

.production-line-card:hover .production-line-image img {
    transform: scale(1.05);
}

.production-line-content {
    padding: var(--spacing-lg);
}

.production-line-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.production-line-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.production-line-specs {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.spec-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.spec-tag i {
    color: var(--primary);
    font-size: 12px;
}

/* Factory Gallery Section */
.factory-gallery {
    margin-top: var(--spacing-xl);
}

/* Gallery Card (for carousel) */
.gallery-card {
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all var(--transition-fast);
    cursor: pointer;
    height: 100%;
}

.gallery-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

.gallery-card-image {
    position: relative;
    height: 520px;
    overflow: hidden;
}

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

.gallery-card:hover .gallery-card-image img {
    transform: scale(1.05);
}

.gallery-card-content {
    padding: var(--spacing-lg);
}

.gallery-card-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.gallery-card-desc {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin: 0;
}

/* Gallery Card - Image Only (no text) */
.gallery-card-image-only {
    position: relative;
    height: 520px;
    overflow: hidden;
    border-radius: var(--radius-xl);
    border: 1px solid var(--border-default);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.gallery-card-image-only:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-lg);
}

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

.gallery-card-image-only:hover img {
    transform: scale(1.05);
}

/* Responsive - Production Section */
@media (max-width: 1024px) {
    .production-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .carousel-slide {
        flex: 0 0 calc(50% - var(--spacing-sm));
        margin-right: var(--spacing-md);
    }
    
    .production-line-image {
        height: 420px;
    }
    
    .gallery-card-image {
        height: 420px;
    }
    
    .gallery-card-image-only {
        height: 420px;
    }
}

@media (max-width: 768px) {
    .production-stats {
        grid-template-columns: 1fr 1fr;
        gap: var(--spacing-md);
    }
    
    .production-stat-item {
        padding: var(--spacing-md);
    }
    
    .production-stat-num {
        font-size: 2rem;
    }
    
    .carousel-slide {
        flex: 0 0 100%;
        margin-right: var(--spacing-md);
    }
    
    .carousel-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .production-line-image {
        height: 320px;
    }
    
    .production-line-specs {
        flex-direction: column;
    }
    
    .gallery-card-image {
        height: 320px;
    }
    
    .gallery-card-image-only {
        height: 320px;
    }
}

@media (max-width: 480px) {
    .production-stats {
        grid-template-columns: 1fr;
    }
    
    .production-stat-item {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-sm);
        text-align: left;
    }
}

/* Process Steps */
.process-steps {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.process-step {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    border-left: 3px solid var(--primary);
}

.step-num {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    font-size: var(--font-size-sm);
    font-weight: 700;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.step-text {
    font-size: var(--font-size-sm);
    color: var(--text-primary);
    font-weight: 500;
}

/* Certification Grid */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.cert-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.cert-item:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.cert-icon {
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.cert-icon i { font-size: 18px; }

.cert-name {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

/* Certification Images Grid - Unified 4-column grid */
.cert-images-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    max-width: 1200px;
    margin: 0 auto;
}

/* Hide the row wrappers, use flat grid */
.cert-images-row {
    display: contents;
}

.cert-image-item {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    background: var(--bg-base);
    aspect-ratio: 4 / 3;
}

.cert-image-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

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

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

/* ========================================
   Certifications Section - New Design
   ======================================== */

.cert-section {
    position: relative;
    overflow: hidden;
    background: #fff;
}

.cert-section .container {
    position: relative;
    z-index: 2;
}

.cert-section .section-header-center {
    margin-bottom: var(--spacing-xl);
}

.cert-section .section-badge {
    background: var(--primary);
}

/* Marquee Auto-scroll - Full width */
.cert-marquee-wrapper {
    position: relative;
    overflow: hidden;
    padding: var(--spacing-xl) 0;
    padding-top: calc(var(--spacing-xl) + 8px); /* Extra space for hover effect */
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    width: 100vw;
}

/* Edge fade effect */
.cert-marquee-wrapper::before,
.cert-marquee-wrapper::after {
    content: '';
    position: absolute;
    top: 0;
    bottom: 0;
    width: 150px;
    z-index: 10;
    pointer-events: none;
}

.cert-marquee-wrapper::before {
    left: 0;
    background: linear-gradient(to right, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
}

.cert-marquee-wrapper::after {
    right: 0;
    background: linear-gradient(to left, rgba(255, 255, 255, 1) 0%, rgba(255, 255, 255, 0) 100%);
}

.cert-marquee {
    width: 100%;
    overflow: hidden;
}

.cert-marquee-track {
    display: flex;
    gap: var(--spacing-xl);
    animation: cert-scroll 50s linear infinite;
    width: max-content;
}

.cert-marquee-track:hover {
    animation-play-state: paused;
}

@keyframes cert-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

/* Certificate Frame - Simple border style with primary color */
.cert-frame {
    flex-shrink: 0;
    position: relative;
    width: 320px;
    padding: 24px;
    border: 2px solid rgba(var(--primary-rgb), 0.6);
    border-radius: 0;
    background: rgba(var(--primary-rgb), 0.08);
    backdrop-filter: blur(8px);
    transition: all var(--transition-fast);
    cursor: pointer;
    overflow: hidden;
}

.cert-frame:hover {
    border-color: var(--primary);
    background: rgba(var(--primary-rgb), 0.15);
}

.cert-frame img {
    width: 100%;
    aspect-ratio: 4 / 3;
    object-fit: cover;
    border-radius: 0;
    display: block;
}

/* Responsive - Certifications */
@media (max-width: 1024px) {
    .cert-frame {
        width: 280px;
        padding: 20px;
    }
    
    .cert-marquee-track {
        gap: var(--spacing-lg);
    }
}

@media (max-width: 768px) {
    .cert-frame {
        width: 240px;
        padding: 16px;
    }
    
    .cert-marquee-track {
        gap: var(--spacing-md);
        animation-duration: 40s;
    }
    
    .cert-marquee-wrapper::before,
    .cert-marquee-wrapper::after {
        width: 80px;
    }
}

@media (max-width: 480px) {
    .cert-frame {
        width: 200px;
        padding: 12px;
    }
    
    .cert-marquee-wrapper::before,
    .cert-marquee-wrapper::after {
        width: 50px;
    }
}

/* Certification Lightbox */
.cert-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.cert-lightbox.active {
    opacity: 1;
    visibility: visible;
}

.cert-lightbox-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.92);
    cursor: pointer;
}

.cert-lightbox-content {
    position: relative;
    z-index: 1;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-lightbox-img-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-lightbox-img-wrapper img {
    max-width: 85vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.cert-lightbox-close {
    position: fixed;
    top: 20px;
    right: 20px;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-full);
    color: #fff;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 10;
}

.cert-lightbox-close:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.cert-lightbox-prev,
.cert-lightbox-next {
    position: fixed;
    top: 50%;
    transform: translateY(-50%);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    border-radius: var(--radius-full);
    color: #fff;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all var(--transition-fast);
    z-index: 10;
}

.cert-lightbox-prev {
    left: 20px;
}

.cert-lightbox-next {
    right: 20px;
}

.cert-lightbox-prev:hover,
.cert-lightbox-next:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-50%) scale(1.1);
}

.cert-lightbox-counter {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 20px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    color: #fff;
    font-size: var(--font-size-sm);
    font-weight: 500;
    z-index: 10;
}

/* Lightbox Responsive */
@media (max-width: 768px) {
    .cert-lightbox-prev,
    .cert-lightbox-next {
        width: 44px;
        height: 44px;
        font-size: 1rem;
    }
    
    .cert-lightbox-prev {
        left: 10px;
    }
    
    .cert-lightbox-next {
        right: 10px;
    }
    
    .cert-lightbox-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
    }
    
    .cert-lightbox-img-wrapper img {
        max-width: 95vw;
        max-height: 80vh;
    }
}

/* Delivery Timeline */
.delivery-timeline {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.delivery-phase {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
}

.phase-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius-md);
    font-size: 14px;
}

.phase-info { display: flex; flex-direction: column; }

.phase-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
}

.phase-time {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

.delivery-connector {
    width: 24px;
    height: 2px;
    background: var(--border-default);
}

/* Packaging Features */
.packaging-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.pkg-feature {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    color: var(--text-primary);
}

.pkg-feature i {
    color: var(--primary);
    font-size: 16px;
}

/* Service Cards */
.service-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-md);
}

.service-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
    cursor: pointer;
}

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

.service-card i {
    font-size: 1.5rem;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.service-title {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.service-desc {
    font-size: var(--font-size-xs);
    color: var(--text-secondary);
}

/* Global Section - Centered Header */
.section-header-center {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.section-header-center.visible {
    opacity: 1;
    transform: translateY(0);
}

.section-header-center .section-badge {
    margin: 0 auto var(--spacing-md);
}

.section-header-center .section-lead {
    max-width: 600px;
    margin: 0 auto;
}

/* Global Section with Map Background */
.global-section {
    position: relative;
    overflow: hidden;
}

.global-section-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.global-section-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.global-section-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.92) 0%, rgba(248, 250, 252, 0.95) 100%);
    z-index: 1;
}

.global-section .container {
    position: relative;
    z-index: 2;
}

/* Global Stats Grid */
.global-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
}

.global-stat-card {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    background: var(--bg-base);
    border: 1px solid var(--border-default);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.global-stat-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.global-stat-card .stat-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--primary-light);
    color: var(--primary);
    border-radius: var(--radius-lg);
    font-size: 1.5rem;
    flex-shrink: 0;
}

.global-stat-card .stat-info {
    display: flex;
    flex-direction: column;
}

.global-stat-card .stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.global-stat-card .stat-text {
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
    margin-top: 4px;
}


/* CTA Section with Background Image */
.about-cta {
    position: relative;
    padding: 100px 0;
    overflow: hidden;
}

.about-cta-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 0;
}

.about-cta-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-cta-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(30, 41, 59, 0.88) 100%);
    z-index: 1;
}

.about-cta .container {
    position: relative;
    z-index: 2;
}

.cta-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.cta-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: #fff;
    margin-bottom: var(--spacing-sm);
}

.cta-desc {
    font-size: var(--font-size-base);
    color: rgba(255, 255, 255, 0.8);
}

.cta-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.btn-cta-primary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 14px 28px;
    background: var(--primary);
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-cta-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 14px 28px;
    background: transparent;
    color: #fff;
    font-size: var(--font-size-base);
    font-weight: 600;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-cta-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .section-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
    
    .section-grid-reverse { direction: ltr; }
    
    .image-wrapper img { height: 350px; }
    
    .global-stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .about-hero { min-height: calc(100vh - 60px); } /* 移动端 header 更小 */
    
    .about-hero-inner { padding: 100px var(--spacing-md) 60px; }
    
    .about-hero-stats { 
        gap: var(--spacing-md);
        flex-direction: column;
        align-items: center;
    }
    
    .stat-item {
        width: 100%;
        max-width: 320px;
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .stat-icon-wrapper {
        width: 48px;
        height: 48px;
    }
    
    .stat-icon-wrapper i {
        font-size: 1.25rem;
    }
    
    .stat-num { font-size: 1.75rem; }
    
    .stat-divider { display: none; }
    
    .quick-nav-inner {
        justify-content: flex-start;
        padding: var(--spacing-sm);
    }
    
    .quick-nav-item span { display: none; }
    
    .quick-nav-item {
        padding: 10px 12px;
    }
    
    .quick-nav-item i { font-size: 16px; }
    
    .about-section { padding: 60px 0; }
    
    .section-title { font-size: var(--font-size-2xl); }
    
    .image-wrapper img { height: 280px; }
    
    .stat-circle {
        width: 100px;
        height: 100px;
    }
    
    .stat-circle .stat-value { font-size: 1.5rem; }
    
    .capability-grid { grid-template-columns: 1fr; }
    
    .capability-item {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
        text-align: left;
    }
    
    .cert-grid { grid-template-columns: 1fr; }
    
    .delivery-timeline {
        flex-direction: column;
        align-items: stretch;
    }
    
    .delivery-connector {
        width: 2px;
        height: 16px;
        margin: 0 auto;
    }
    
    .packaging-features { grid-template-columns: 1fr; }
    
    .service-cards { grid-template-columns: 1fr; }
    
    .global-stats-grid { grid-template-columns: 1fr 1fr; }
    
    .cta-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-actions { justify-content: center; }
}

@media (max-width: 480px) {
    .about-hero-stats {
        gap: var(--spacing-sm);
    }
    
    .stat-item {
        max-width: 100%;
    }
    
    .stat-label {
        max-width: none;
    }
    
    .global-stats-grid { grid-template-columns: 1fr; }
    
    .global-stat-card {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .btn-cta-primary,
    .btn-cta-secondary {
        width: 100%;
        justify-content: center;
    }
}

/* Animation - Respect reduced motion */
@media (prefers-reduced-motion: no-preference) {
    .section-grid,
    .section-header-center {
        transition: opacity 0.6s ease, transform 0.6s ease;
    }
    
    .service-card:hover { transform: translateY(-4px); }
    .btn-cta-primary:hover { transform: translateY(-2px); }
}

@media (prefers-reduced-motion: reduce) {
    .section-grid,
    .section-header-center {
        opacity: 1;
        transform: none;
        transition: none;
    }
    
    .service-card:hover,
    .btn-cta-primary:hover { transform: none; }
}