/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #171a20;
    background-color: #ffffff;
    font-weight: 400;
    letter-spacing: -0.01em;
}

.container {
    width: 100%;
    margin: 0 auto;
    padding: 0 20px;
}

/* 为大屏幕设备优化 */
@media (min-width: 1200px) {
    .container {
        padding: 0 30px;
    }
}

/* Technical Specifications and Downloads Section */
.tech-specs-section {
    padding: 60px 0;
    background: #ffffff;
    border-top: 1px solid #e5e7eb;
}

.tech-specs-section h2 {
    font-size: 2.5rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: 3rem;
    color: #1a202c;
    letter-spacing: -0.02em;
}

/* Tab Navigation */
.tech-tabs-nav {
    display: flex;
    justify-content: center;
    gap: 0;
    margin-bottom: 0;
    background: #f8fafc;
    margin-left: 0;
    margin-right: auto;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.tech-tab-btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    background: transparent;
    color: #64748b;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    letter-spacing: -0.01em;
}

.tech-tab-btn:hover {
    color: #334155;
    background: rgba(255, 255, 255, 0.5);
}

.tech-tab-btn.active {
    background: #339933;
    color: #ffffff;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    transform: translateY(-1px);
}

/* Tab Content */
.tech-tabs-content {

    margin: 0 auto;
}

.tech-tab-panel {
    display: none;
    animation: fadeInUp 0.4s ease-out;
}

.tech-tab-panel.active {
    display: block;
    border: 1px solid #339933;
}

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

/* Specifications Container */
.specs-container {
    background: #ffffff;
    border: 1px solid #e2e8f0;
    overflow: hidden;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.specs-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    border-bottom: 1px solid #e2e8f0;
    cursor: pointer;
    transition: background 0.3s ease;
}

.specs-header:hover {
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
}

.specs-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #1e293b;
    margin: 0;
    letter-spacing: -0.01em;
}

.specs-toggle {
    background: none;
    border: none;
    color: #64748b;
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.specs-toggle:hover {
    background: rgba(100, 116, 139, 0.1);
    color: #334155;
}

.specs-toggle svg {
    transition: transform 0.3s ease;
}

.specs-toggle[aria-expanded="false"] svg {
    transform: rotate(-90deg);
}

/* Specifications Content */
.specs-content {
    padding: 0;
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.specs-content.collapsed {
    max-height: 0;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid #f1f5f9;
    transition: background 0.2s ease;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-row:hover {
    background: #f8fafc;
}

.spec-label {
    font-weight: 500;
    color: #475569;
    font-size: 0.95rem;
    flex: 1;
    letter-spacing: -0.005em;
}

.spec-value {
    font-weight: 600;
    color: #1e293b;
    font-size: 0.95rem;
    text-align: right;
    flex: 1;
    letter-spacing: -0.005em;
}

/* Responsive Design */
@media (max-width: 768px) {
    .tech-specs-section {
        padding: 40px 0;
    }
    
    .tech-specs-section h2 {
        font-size: 2rem;
        margin-bottom: 2rem;
    }
    
    .tech-tabs-nav {
        flex-direction: column;
        gap: 4px;
        max-width: none;
        margin-bottom: 0;
        margin-left: 0;
    }
    
    .tech-tab-btn {
        padding: 14px 20px;
        font-size: 0.9rem;
    }
    
    .specs-header {
        padding: 16px 20px;
    }
    
    .specs-header h3 {
        font-size: 1.125rem;
    }
    
    .spec-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        padding: 14px 20px;
    }
    
    .spec-label,
    .spec-value {
        text-align: left;
        flex: none;
        width: 100%;
    }
    
    .spec-value {
        font-weight: 500;
        color: #64748b;
    }
}

@media (max-width: 480px) {
    .tech-tabs-nav {
        padding: 4px;
    }
    
    .tech-tab-btn {
        padding: 12px 16px;
        font-size: 0.85rem;
    }
    
    .specs-header {
        padding: 14px 16px;
    }
    
    .spec-row {
        padding: 12px 16px;
    }
}

/* Large Screen Optimizations */
@media (min-width: 1200px) {
    .tech-specs-section h2 {
        font-size: 2.75rem;
        margin-bottom: 3.5rem;
    }
    
    .tech-tabs-nav {
        margin-left: 0;
    }
    
    .tech-tab-btn {
        padding: 14px 24px;
        font-size: 1rem;
    }
    
   
    
    .specs-header {
        padding: 24px 28px;
    }
    
    .specs-header h3 {
        font-size: 1.375rem;
    }
    
    .spec-row {
        padding: 18px 28px;
    }
    
    .spec-label,
    .spec-value {
        font-size: 1rem;
    }
}

@media (min-width: 1600px) {
    .tech-specs-section {
        padding: 80px 0;
    }
    
    .tech-specs-section h2 {
        font-size: 3rem;
        margin-bottom: 4rem;
    }
    
    .tech-tabs-nav {

        margin-left: 0;
    }
    
}

/* Technical Specifications Downloads Section */

.download-buttons-row {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    max-width: 800px;
    margin: 0 auto;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 20px;
    min-width: 180px;
    justify-content: center;
    font-size: 0.875rem;
    font-weight: 500;
    white-space: nowrap;
}

.download-btn svg {
    flex-shrink: 0;
    transition: transform 0.3s ease;
}

.download-btn:hover svg {
    transform: translateY(2px);
}

/* Responsive Design for Download Buttons */
@media (max-width: 768px) {
    .tech-downloads-section {
        margin-top: 1rem;
    
    }
    
    .download-buttons-row {
        flex-direction: column;
        gap: 1rem;
        align-items: center;
    }
    
    .download-btn {
        min-width: 200px;
        padding: 14px 20px;
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .download-buttons-row {
        gap: 0.75rem;
    }
    
    .download-btn {
        min-width: 180px;
        padding: 12px 16px;
        font-size: 0.85rem;
    }
}

/* Large Screen Optimizations for Download Buttons */
@media (min-width: 1200px) {
    .tech-downloads-section {
        margin-top: 1rem;
        padding-top: 1rem;
    }
    
    .download-buttons-row {
        gap: 2rem;
        max-width: 900px;
    }
    
    .download-btn {
        padding: 14px 24px;
        min-width: 200px;
        font-size: 0.9rem;
    }
}

@media (min-width: 1600px) {
    .tech-downloads-section {
        margin-top: 1rem;
        padding-top: 1rem;
    }
    
    .download-buttons-row {
        gap: 2.5rem;
        max-width: 1000px;
    }
    
    .download-btn {
        padding: 16px 28px;
        min-width: 220px;
        font-size: 1rem;
    }
}

@media (min-width: 1600px) {
    .container {
        padding: 0 40px;
    }
}

@media (min-width: 1920px) {
    .container {
        padding: 0 60px;
    }
    
    /* 超大屏幕宽屏模式优化 */
    .products-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 1.5rem;
        max-width: 1800px;
        margin: 0 auto;
    }
    
    .products-grid-large {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
        max-width: 1800px;
        margin: 0 auto;
    }
    
    .product-card {
        min-height: 480px;
        border-radius: 8px;
    }
    
    .product-content {
        padding: 2.5rem;
    }
    
    .product-content h3 {
        font-size: 1.6rem;
        margin-bottom: 1.2rem;
    }
    
    .product-content p {
        font-size: 1.1rem;
        margin-bottom: 2rem;
        line-height: 1.6;
    }
    
    .product-content .btn {
        font-size: 1rem;
        padding: 0.75rem 2rem;
        min-width: 160px;
    }
}

/* 超宽屏幕优化 (2560px+) */
@media (min-width: 2560px) {
    .container {
        padding: 0 80px;
        max-width: 2400px;
        margin: 0 auto;
    }
    
    .products-grid {
        grid-template-columns: repeat(5, 1fr);
        gap: 2rem;
        max-width: 2200px;
    }
    
    .products-grid-large {
        grid-template-columns: repeat(4, 1fr);
        gap: 2rem;
        max-width: 2200px;
    }
    
    .product-card {
        min-height: 520px;
        border-radius: 12px;
    }
    
    .product-content {
        padding: 3rem;
    }
    
    .product-content h3 {
        font-size: 1.8rem;
        margin-bottom: 1.5rem;
    }
    
    .product-content p {
        font-size: 1.2rem;
        margin-bottom: 2.5rem;
        line-height: 1.7;
    }
    
    .product-content .btn {
        font-size: 1.1rem;
        padding: 1rem 2.5rem;
        min-width: 180px;
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 500;
    line-height: 1.2;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
    color: #171a20;
}

h1 {
    font-size: 3.5rem;
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.03em;
}

h2 {
    font-size: 2.75rem;
    font-weight: 500;
    text-align: center;
    margin-bottom: 3rem;
    line-height: 1.15;
}

h3 {
    font-size: 1.75rem;
    font-weight: 500;
    line-height: 1.25;
}

h4 {
    font-size: 1.375rem;
    font-weight: 500;
}

p {
    margin-bottom: 1rem;
    color: #5c5e62;
    font-size: 1rem;
    line-height: 1.5;
    font-weight: 400;
    letter-spacing: -0.005em;
}

/* Buttons - Tesla Style */
.btn {
    display: inline-block;
    padding: 8px 32px;
    border-radius: 4px;
    text-decoration: none;
    font-weight: 400;
    text-align: center;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border: 1px solid transparent;
    cursor: pointer;
    font-size: 0.875rem;
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    letter-spacing: 0.5px;
    text-transform: capitalize;
    min-width: 160px;
    position: relative;
    overflow: hidden;
}

/* Blue Primary Button - "Order Now" Style */
.btn.primary {
    background: #339933;
    color: white;
    border-color: #339933;
    font-weight: 600;
}

.btn.primary:hover {
    background: #006633;
    border-color: #006633;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(51, 153, 51, 0.4);
}

/* White Secondary Button - "Learn More" Style */
.btn.secondary {
    background: white;
    color: #171a20;
    border-color: #d1d5db;
    font-weight: 500;
}

.btn.secondary:hover {
    background: #f9fafb;
    border-color: #9ca3af;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.btn.outline {
    background: transparent;
    color: #171a20;
    border-color: #d1d5db;
    font-weight: 500;
}

.btn.outline:hover {
    background: #f9fafb;
    border-color: #3b82f6;
    color: #3b82f6;
    transform: translateY(-1px);
}

/* Header */
.header {
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.header.scrolled {
    background: rgba(255, 255, 255, 0.99);
    box-shadow: 0 1px 30px rgba(0, 0, 0, 0.08);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    max-width: 1200px;
    margin: 0 auto;
}

.logo img {
    height: 32px;
    width: auto;
    transition: all 0.3s ease;
}

.logo img:hover {
    opacity: 0.8;
}

.nav {
    display: flex;
    gap: 2.5rem;
    align-items: center;
}

/* 宽屏导航优化 */
@media (min-width: 1200px) {
    .nav {
        gap: 3rem;
    }
}

@media (min-width: 1600px) {
    .nav {
        gap: 3.5rem;
    }
}

.nav a {
    text-decoration: none;
    color: #171a20;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.5px;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    padding: 0.5rem 0;
}

.nav a:hover,
.nav a.active {
    color: #000;
    transform: translateY(-1px);
}

.nav a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #339933, #2d8a2d);
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    transform: translateX(-50%);
    border-radius: 1px;
}

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

.language-selector {
    position: relative;
    color: #5c5e62;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: color 0.3s ease;
}

.language-current {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.language-current:hover {
    background: rgba(0, 0, 0, 0.05);
    color: #171a20;
}

.language-current svg {
    width: 16px;
    height: 16px;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.language-current:hover svg {
    opacity: 1;
}

.dropdown-arrow {
    width: 12px !important;
    height: 12px !important;
    transition: transform 0.3s ease;
}

.language-selector.active .dropdown-arrow {
    transform: rotate(180deg);
}

.language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 8px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
    min-width: 120px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1001;
}

.language-selector.active .language-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.language-option {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

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

.language-option:hover {
    background: rgba(51, 153, 51, 0.05);
    color: #339933;
}

.language-option.active {
    background: rgba(51, 153, 51, 0.1);
    color: #339933;
    font-weight: 600;
}

.language-option span {
    display: block;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    transition: all 0.3s ease;
}

/* Main Banner Carousel - Style */
.main-banner {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
    background: #000;
}

.banner-carousel {
    position: relative;
    width: 100%;
    height: 100vh;
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transform: translateX(100%);
    transition: all 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    z-index: 1;
}

.banner-slide.active {
    opacity: 1;
    transform: translateX(0);
    z-index: 2;
}

.banner-slide.prev {
    transform: translateX(-100%);
}

.slide-background {
    width: 100%;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background-attachment: fixed;
    background-position: center center;
    background-repeat: no-repeat;
    background-size: cover;
}

/* slide-style Responsive Image Styles */
.slide-background.slide-responsive {
    background: none;
    overflow: hidden;
}

.slide-responsive-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.slide-responsive-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

.slide-gradient-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.3) 0%,
        rgba(0, 0, 0, 0.1) 30%,
        rgba(0, 0, 0, 0.1) 70%,
        rgba(0, 0, 0, 0.4) 100%
    );
    z-index: 1;
    pointer-events: none;
}

.banner-slide.active .slide-responsive-img {
    transform: scale(1.05);
}

.banner-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    width: 100%;
    height: 100vh;
    padding: 0 2rem;
    position: relative;
    z-index: 3;
}

.banner-text {
    max-width: 900px;
    margin: 0 auto;
    animation: slideUpFadeIn 1.5s ease-out 0.3s both;
}

/* 宽屏轮播图文本优化 */
@media (min-width: 1200px) {
    .banner-text {
        max-width: 1200px;
    }
}

@media (min-width: 1600px) {
    .banner-text {
        max-width: 1400px;
    }
}

@media (min-width: 1920px) {
    .banner-text {
        max-width: 1600px;
    }
}

.banner-text h1 {
    color: white;
    margin-bottom: 2rem;
    font-size: 5.5rem;
    font-weight: 600;
    line-height: 1.0;
    text-shadow: 0 8px 16px rgba(0, 0, 0, 0.4);
    letter-spacing: -0.04em;
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* 宽屏标题字体优化 */
@media (min-width: 1600px) {
    .banner-text h1 {
        font-size: 3.5rem;
    }
}

@media (min-width: 1920px) {
    .banner-text h1 {
        font-size: 3.5rem;
    }
}

.banner-text p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 3.5rem;
    line-height: 1.4;
    text-shadow: 0 4px 8px rgba(0, 0, 0, 0.3);
    font-weight: 400;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    letter-spacing: -0.01em;
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

/* 宽屏段落文本优化 */
@media (min-width: 1200px) {
    .banner-text p {
        max-width: 800px;
        font-size: 1.375rem;
    }
}

@media (min-width: 1600px) {
    .banner-text p {
        max-width: 900px;
        font-size: 1.5rem;
    }
}

.banner-buttons {
    display: flex;
    gap: 2rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: slideUpFadeIn 1.5s ease-out 0.6s both;
}

.banner-buttons .btn {
    padding: 0.5rem 2rem;
    font-weight: 500;
    font-size: 0.75rem;
    letter-spacing: 0.5px;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-radius: 4px;
    min-width: 180px;
    position: relative;
    overflow: hidden;
    text-transform: capitalize;
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    border: 3px solid transparent;
}

/* Blue Primary Button for Banner */
.banner-buttons .btn.primary {
    background: #339933;
    color: white;
    border-color: #339933;
    font-weight: 600;
}

.banner-buttons .btn.primary:hover {
    background: #006633;
    border-color: #006633;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(51, 153, 51, 0.4);
}

/* White Secondary Button for Banner */
.banner-buttons .btn.secondary {
    background: white;
    color: #171a20;
    border-color: #d1d5db;
    font-weight: 500;
}

.banner-buttons .btn.secondary:hover {
    background: #f9fafb;
    border-color: #f9fafb;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

/* slide-style animations */
.banner-slide.active .slide-background {
    animation: backgroundZoomIn 2.5s ease-out both;
}

.banner-slide:not(.active) .banner-text {
    animation: slideDownFadeOut 0.8s ease-in both;
}

.banner-slide:not(.active) .banner-buttons {
    animation: slideDownFadeOut 0.8s ease-in 0.1s both;
}

@keyframes backgroundZoomIn {
    from {
        opacity: 0;
        transform: scale(1.08);
        filter: blur(3px) brightness(0.8);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.04);
        filter: blur(1px) brightness(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
        filter: blur(0) brightness(1);
    }
}

@keyframes slideUpFadeIn {
    from {
        opacity: 0;
        transform: translateY(80px) scale(0.95);
        filter: blur(1px);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0);
    }
}

@keyframes slideDownFadeOut {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(-40px) scale(0.98);
    }
}

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

/* Parallax effect for background */
.slide-background {
    will-change: transform;
    backface-visibility: hidden;
    perspective: 1000px;
}

/* Enhanced button hover effects */
.banner-buttons .btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.banner-buttons .btn:hover::before {
    left: 100%;
}

/* Enhanced slide background overlay */
.slide-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        180deg,
        rgba(0, 0, 0, 0.1) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.5) 100%
    );
    z-index: 1;
}

.banner-content {
    position: relative;
    z-index: 2;
}

/* slide-style Carousel Controls - Removed unused carousel control styles */

/* slide-style Carousel Indicators */
.carousel-indicators {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.75rem;
    z-index: 10;
}

.indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    border: none;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.indicator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: transparent;
    transition: all 0.3s ease;
}

.indicator.active {
    background: white;
    transform: scale(1.25);
}

.indicator:hover::before {
    background: rgba(255, 255, 255, 0.1);
}

/* Product Features */
.product-features {
    padding: 30px 0;
    background: white;
}

/* Product Features Two-Column Overview */
.product-features-section{
    padding: 30px 0;

}
/* Alternate variant for Product Features section */
.product-features-section.alt {
    background: #f9fafb;
    border-top: 1px solid #eaeef2;
    border-bottom: 1px solid #eaeef2;
}
.product-features-section.alt .feature-icon {
    background: #eef3f7;
}
.product-features-section.alt .features-image {
    padding-left: 0;
    padding-right: 1rem;
    justify-content: flex-end;
}
.product-features-section .features-overview {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}
/* Alt variant: reverse columns using flex for the second section */
.product-features-section.alt .features-overview {
    display: flex;
    flex-direction: row-reverse;
    gap: 2rem;
    align-items: center;
}
@media (max-width: 768px) {
    .product-features-section.alt .features-overview {
        flex-direction: column;
    }
}

.product-features-section .features-overview-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.product-features-section .features-overview-content h2 {
    font-size: 2rem;
    letter-spacing: -0.02em;
    text-align: left;
    margin-bottom: 0.5rem;
}

.product-features-section .features-overview-content p {
    font-size: 1.125rem;
    line-height: 1.2;
    color: #333;
    margin-top: 0;
}

/* Removed unused .product-features-section .feature-list style */

.product-features-section .feature-item {
    align-items: flex-start;
}

.product-features-section .feature-item-content h3 {
    font-size: 1.125rem;
    margin: 0 0 0.25rem;
    color: #222;
    letter-spacing: -0.01em;
}

.product-features-section .feature-item-content p {
    font-size: 0.95rem;
    color: #555;
    line-height: 1.5;
}

@media (max-width: 768px) {
    .product-features-section .features-overview {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .product-features-section .features-image {
        min-height: 320px;
    }
}

.features-content {
    display: grid;
    grid-template-columns: 3fr 2fr;
    gap: 1rem;
    align-items: center;
}

/* 宽屏产品特性优化 */
@media (min-width: 1200px) {
    .features-content {
        gap: 1rem;
    }
}

@media (min-width: 1600px) {
    .features-content {
        gap: 1rem;
        grid-template-columns: 3fr 2fr;
    }
}

@media (min-width: 1920px) {
    .features-content {
        gap: 1rem;
    }
}

.features-text {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    min-height: 500px;
    display: flex;
    align-items: center;
}

.features-background-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    z-index: 1;
}

.features-text-content {

    position: relative;
    z-index: 2;
    background: transparent;
    color: white;
    padding: 10rem 0 0 1rem;
    border-radius: 10px;
    text-align: left;
    max-width: 500px;


}

/* 宽屏产品特性文本优化 */
@media (min-width: 1200px) {
    .features-text-content {
        max-width: 600px;
padding: 10rem 0 0 1rem;
    }
}

@media (min-width: 1600px) {
    .features-text-content {
        max-width: 700px;
padding: 10rem 0 0 1rem;
    }
}

.features-text-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    letter-spacing: -0.02em;
}

/* 宽屏产品特性标题优化 */
@media (min-width: 1200px) {
    .features-text-content h3 {
        font-size: 2rem;
    }
}

@media (min-width: 1600px) {
    .features-text-content h3 {
        font-size: 2rem;
    }
}

.features-text-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* 宽屏产品特性段落优化 */
@media (min-width: 1200px) {
    .features-text-content p {
        font-size: 1.25rem;
    }
}

@media (min-width: 1600px) {
    .features-text-content p {
        font-size: 1.375rem;
    }
}

.features-list {
    margin: 0.5rem 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.feature-icon {
    width: 50px;
    height: 50px;
    background: #f8f9fa;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-icon img {
    width: 30px;
    height: 30px;
}

.feature-item span {
    font-weight: 500;
    color: #333;
}

.features-buttons {
    display: flex;
    gap: 1rem;
}

.features-image {
    position: relative;
    min-height: 500px;
    border-radius: 10px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: flex-start;
    padding-left: 1rem;
}

.features-responsive-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.features-background-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.features-image-content {
    position: relative;
    z-index: 2;
    background: transparent;
    color: white;
    padding: 10rem 0 0;
    border-radius: 10px;
    text-align: left;
    max-width: 500px;
}

.features-image-content h3 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
    font-family: 'Gotham', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    letter-spacing: -0.02em;
}

.features-image-content p {
    font-size: 1.125rem;
    line-height: 1.6;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
}

.features-image-buttons {
    display: flex;
    gap: 1rem;
    justify-content: left;
    flex-wrap: wrap;
}

.features-image-buttons .btn {
    min-width: 160px;
}

.features-text-buttons {
    display: flex;
    gap: 1rem;
    justify-content: left;
    flex-wrap: wrap;
}

.features-text-buttons .btn {
    min-width: 160px;
}

/* 视频播放控制按钮 */
.video-controls {
    position: absolute;
    top: 2rem;
    right: 2rem;
    z-index: 10;
}

.video-play-pause-btn {
    background: hsla(0, 0%, 50%, 0.65);
    border: 0 solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
    color: white;
}

.video-play-pause-btn:hover {
    background: hsla(0, 0%, 50%, 0.1);
    border-color: rgba(255, 255, 255, 0.6);
    transform: scale(1.05);
}

.video-play-pause-btn:active {
    transform: scale(0.95);
}

/* 播放/暂停图标控制 */
.video-play-pause-btn .play-icon {
    display: none;
}

.video-play-pause-btn .pause-icon {
    display: block;
}

.video-play-pause-btn.paused .play-icon {
    display: block;
}

.video-play-pause-btn.paused .pause-icon {
    display: none;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .video-controls {
        top: 1rem;
        right: 1rem;
    }
    
    .video-play-pause-btn {
        width: 40px;
        height: 40px;
    }
    
    .video-play-pause-btn svg {
        width: 20px;
        height: 20px;
    }
}

/* Product Showcase */
.product-showcase {
    padding: 40px 0;
    background: #f8f9fa;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

/* 新增两列产品网格 */
.products-grid-large {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.product-card {
    position: relative;
    border-radius: 4px;
    overflow: hidden;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
    min-height: 300px;
    display: flex;
    align-items: flex-end;
    background-color: #ccc;
}

/* Picture元素样式 */
.product-responsive-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.product-background-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

/* 大尺寸产品卡样式 */
.product-card--large {
    min-height: 400px;
}

.product-card--large .product-content {
    padding: 2rem;
}

.product-card--large .product-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.product-card--large .product-content p {
    font-size: 1rem;
    margin-bottom: 1.5rem;
}

.product-content {
    position: relative;
    z-index: 2;
    padding: 1.5rem;
    text-align: center;
    width: 100%;
    border-radius: 0 0 8px 8px;
}

.product-content h3 {
    color: #fff;
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.product-content p {
    color: #fff;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    line-height: 1.4;
}

.product-content .btn {

    color: #333;

    transition: all 0.3s ease;
}

.product-content .btn:hover {
    background: #339933;
    color: white;
 
    transform: translateY(-2px);
}

/* Installation Solutions */
.installation-solutions {
    padding: 40px 0;
    background: white;
}

.solutions-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.5rem;
}

.solution-card {
    background: #f8f9fa;
    border-radius: 6px;
    padding: 0;
    text-align: center;
    transition: all 0.3s ease;
    min-height: 200px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
    position: relative;
    overflow: hidden;
}

.solution-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.solution-card h3 {
    color: #333;
    font-size: 1.25rem;
    background: rgba(255, 255, 255, 0.3);
    padding: 0.75rem 1rem;
    border-radius: 0;
    margin: 0;
    width: 100%;
    position: absolute;
    bottom: 0;
    left: 0;
    z-index: 2;
}

/* Project Cases */
.project-cases {
    padding: 48px 0; /* Tesla风格：桌面端padding */
    background: #f8f9fa;
    /* Tesla风格：CSS变量控制不同设备的padding */
    --tcl-section-padding-desktop-block-start: 48px;
    --tcl-section-padding-tablet-block-start: 40px;
    --tcl-section-padding-mobile-block-start: 24px;
}

.cases-container {
    position: relative;
    min-height: auto; /* 改为auto，让内容决定高度 */
    overflow: hidden;
    /* Tesla风格：容器适应性设计 */
    width: 100%;
    max-width: 100%;
    box-sizing: border-box;
    /* 确保在不同屏幕下都有合适的最小高度 */
    min-height: 600px; /* 桌面端最小高度 */
}
/* Tesla-style Freeflow Carousel */
.tcl-freeflow-carousel__container {
    position: relative;
    margin-top: 2rem;
    /* CSS Variables for Tesla-style control */
    --tcl-freeflow-carousel-container__slide--max-inline-size: 1024px;
    --tcl-freeflow-carousel-container__slide--block-size: 580px;
    --tcl-freeflow-carousel-slides--column-start: 0;
    --tcl-freeflow-carousel-container__slide--resized-block-size: 580px;
    --tcl-carousel-transition-duration: 0.6s;
    --tcl-carousel-transition-timing: cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.tcl-freeflow-carousel__wrapper {
    position: relative;
    width: 100%;
    max-width: 100vw;
    margin: 0 auto;
    overflow: visible;
    border-radius: 0;
    box-shadow: none;
    /* Tesla风格：显示多个slides预览 */
    display: block;
    padding: 0 2%; /* 减少padding，让图片可以更接近边缘 */
}

.tcl-freeflow-carousel__track {
    display: flex;
    transition: transform var(--tcl-carousel-transition-duration) var(--tcl-carousel-transition-timing);
    width: 100%;
    gap: 1.5rem; /* 减少间距，更接近Tesla风格 */
    align-items: center;
    justify-content: flex-start;
}

.tcl-freeflow-carousel__slide {
    flex: 0 0 80%; /* 所有slide统一占60%宽度 */
    width: 80%;
    opacity: 1; /* 移除透明度差异 */
    transition: all var(--tcl-carousel-transition-duration) ease-in-out;
    height: var(--tcl-freeflow-carousel-container__slide--block-size);
    box-sizing: border-box;
    transform: scale(1); /* 保持原始尺寸 */
    border-radius: 16px;
    overflow: hidden;
}

.tcl-freeflow-carousel__slide.active {
    opacity: 1;
    transform: scale(1);
    flex: 0 0 80%; /* 激活的slide保持相同尺寸 */
    width: 80%;
}

.tcl-freeflow-carousel__slide-content {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

/* Energy Card Styles (Tesla-inspired) */
.energy-card {
    background: transparent;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: none;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    height: 100%;
    position: relative;
    width: 100%;
}

.energy-card:hover {
    transform: none;
    box-shadow: none;
}

.energy-card__image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: transparent;
    z-index: 1;
    border-radius: 16px;
}

.energy-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Tesla-style responsive image styles */
.energy-card__image .tcl-react-image {
    width: 100%;
    height: 100%;
    max-width: 100%;
    max-height: 100%;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
    overflow: hidden;
}

.energy-card__image .tcl-react-media__asset {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    transition: transform 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.energy-card__image .tcl-media--rounded-corners {
    border-radius: 0;
}

.energy-card:hover .energy-card__image .tcl-react-media__asset {
    transform: scale(1); /* 保持原始尺寸 */
}

.energy-card:hover .energy-card__image img {
    transform: scale(1); /* 保持原始尺寸 */
}

.energy-card__content {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 2rem;
    background: transparent;
    border-top: none;
    z-index: 2;
}

.energy-card__title {
    font-size: 1.5rem;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 0.75rem;
    letter-spacing: -0.02em;
}

.energy-card__description {
    color: #ffffff;
    font-size: 1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
    font-weight: 400;
}

.energy-card__stats {
    display: flex;
    gap: 2rem;
    margin-top: 1rem;
}

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

.stat-value {
    font-size: 1.75rem;
    font-weight: 800;
    color: #ffffff;
    line-height: 1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: #ffffff;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Tesla-style Navigation */
.tcl-freeflow-carousel__navigation {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    pointer-events: none;
    z-index: 10;
}

.tcl-freeflow-carousel__nav-btn {
    position: absolute;
    background: rgba(255, 255, 255, 0.95);
    border: none;
    border-radius: 50%;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    pointer-events: auto;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.tcl-freeflow-carousel__nav-btn:hover {
    background: rgba(255, 255, 255, 1);
    transform: scale(1.1);
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.15);
}

.tcl-freeflow-carousel__nav-btn--prev {
    left: -28px;
}

.tcl-freeflow-carousel__nav-btn--next {
    right: -28px;
}

.tcl-freeflow-carousel__nav-btn svg {
    color: #333;
    transition: color 0.3s ease;
}

.tcl-freeflow-carousel__nav-btn:hover svg {
    color: #007bff;
}

/* Tesla-style Indicators */
.tcl-freeflow-carousel__indicators {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 2rem;
    padding:0 0 0.75rem 0;
}

.tcl-freeflow-carousel__indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    border: none;
    background: rgba(0, 0, 0, 0.2);
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
}

.tcl-freeflow-carousel__indicator::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: transparent;
    transition: all 0.3s ease;
}

.tcl-freeflow-carousel__indicator:hover::before {
    background: rgba(0, 123, 255, 0.1);
}

.tcl-freeflow-carousel__indicator.active {
    background: #007bff;
    transform: scale(1.25);
}

.tcl-freeflow-carousel__indicator.active::before {
    background: rgba(0, 123, 255, 0.2);
}

/* Responsive Design - Tesla Style */
/* Large Desktop (1201px+) */
@media (min-width: 1201px) {
    .tcl-freeflow-carousel__container {
        --tcl-freeflow-carousel-container__slide--block-size: 580px;
    }
    
    .tcl-freeflow-carousel__wrapper {
        max-width: 100vw;
        padding: 0 0.5%;
    }
    
    .tcl-freeflow-carousel__slide {
        flex: 0 0 55%;
        width: 55%;
    }
    
    .tcl-freeflow-carousel__slide.active {
        flex: 0 0 55%; /* 保持相同尺寸 */
        width: 55%;
    }
}

/* Extra Large Desktop (1600px+) */
@media (min-width: 1600px) {
    .cases-container {
        min-height: 650px; /* 大屏幕适当增加高度 */
    }
    
    .tcl-freeflow-carousel__container {
        --tcl-freeflow-carousel-container__slide--block-size: 640px;
    }
    
    .tcl-freeflow-carousel__wrapper {
        padding: 0 1%; /* 减少padding，让图片可以更接近边缘 */
    }
    
    .tcl-freeflow-carousel__slide {
        flex: 0 0 50%;
        width: 50%;
    }
    
    .tcl-freeflow-carousel__slide.active {
        flex: 0 0 50%; /* 保持相同尺寸 */
        width: 50%;
    }
}

/* Ultra Wide Desktop (2000px+) */
@media (min-width: 2000px) {
    .cases-container {
        min-height: 700px; /* 超大屏幕充分利用空间 */
    }
    
    .tcl-freeflow-carousel__container {
        --tcl-freeflow-carousel-container__slide--block-size: 700px;
    }
    
    .tcl-freeflow-carousel__wrapper {
        padding: 0 0.5%; /* 减少padding，让图片可以更接近边缘 */
    }
    
    .tcl-freeflow-carousel__slide {
        flex: 0 0 45%;
        width: 45%;
    }
    
    .tcl-freeflow-carousel__slide.active {
        flex: 0 0 45%; /* 保持相同尺寸 */
        width: 45%;
    }
}

@media (max-width: 1200px) {
    .cases-container {
        min-height: 550px; /* 中等屏幕适中高度 */
    }
    
    .tcl-freeflow-carousel__container {
        --tcl-freeflow-carousel-container__slide--block-size: 520px;
    }
    
    .tcl-freeflow-carousel__wrapper {
        padding: 0 0.5%;
    }
    
    .tcl-freeflow-carousel__slide {
        flex: 0 0 65%;
        width: 65%;
    }
    
    .tcl-freeflow-carousel__slide.active {
        flex: 0 0 65%; /* 保持相同尺寸 */
        width: 65%;
    }
    
    .tcl-freeflow-carousel__nav-btn--prev {
        left: 20px;
    }
    
    .tcl-freeflow-carousel__nav-btn--next {
        right: 20px;
    }
}

/* Tesla风格：平板设备响应式设置 */
@media (max-width: 1024px) and (min-width: 769px) {
    .project-cases {
        padding: var(--tcl-section-padding-tablet-block-start) 0;
    }
    
    .cases-container {
        min-height: 500px; /* 平板设备适中高度 */
    }
}

@media (max-width: 768px) {
    /* Tesla风格：移动端section padding */
    .project-cases {
        padding: var(--tcl-section-padding-mobile-block-start) 0;
    }
    
    .cases-container {
        min-height: 400px; /* 移动端紧凑高度 */
        /* 移动端优化：避免100vh在移动浏览器中的问题 */
        min-height: calc(100vh - 120px); /* 减去导航栏等空间 */
    }
    
    .tcl-freeflow-carousel__container {
        --tcl-freeflow-carousel-container__slide--block-size: 450px;
        margin-top: 1.5rem;
    }
    
    
    .tcl-freeflow-carousel__wrapper {
        /* Tesla风格：移动端适度的左右padding，保持视觉平衡 */
        padding: 0 16px; /* 16px左右padding，符合Tesla移动端设计 */
        overflow: hidden; /* 移动设备上恢复单项显示 */
    }
    
    .tcl-freeflow-carousel__track {
        gap: 10px; /* 移动端轮播间隙10px */
        justify-content: flex-start; /* 改为左对齐，便于精确控制定位 */
        /* Tesla风格：更流畅的移动端动画 */
        transition: transform 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }
    
    .tcl-freeflow-carousel__slide {
        /* Tesla风格：移动端slide占85%宽度，允许显示部分相邻slide */
        flex: 0 0 85%; 
        width: 85%; 
        opacity: 1; /* 移动端所有slide都显示，通过transform控制位置 */
        transform: scale(1);
        /* Tesla风格：移动端圆角设计 */
        border-radius: 8px;
        overflow: hidden;
    }
    
    .tcl-freeflow-carousel__slide.active {
        flex: 0 0 85%; 
        width: 85%; 
        opacity: 1;
        transform: scale(1);
        border-radius: 8px;
    }
    
    .tcl-freeflow-carousel__nav-btn {
        width: 48px;
        height: 48px;
    }
    
    .tcl-freeflow-carousel__nav-btn--prev {
        left: 10px;
    }
    
    .tcl-freeflow-carousel__nav-btn--next {
        right: 10px;
    }
    
    .energy-card__content {
        padding: 1.5rem;
    }
    
    .energy-card__title {
        font-size: 1.25rem;
    }
    
    .energy-card__description {
        font-size: 0.9rem;
    }
    
    .energy-card__stats {
        gap: 1.5rem;
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .cases-container {
        min-height: 350px; /* 超小屏幕更紧凑 */
        /* 超小屏幕优化：使用更保守的高度计算 */
        min-height: calc(100vh - 140px); /* 为小屏幕预留更多空间 */
    }
    
    .tcl-freeflow-carousel__container {
        --tcl-freeflow-carousel-container__slide--block-size: 400px;
    }
    
    .energy-card__content {
        padding: 1.25rem;
    }
    
    .energy-card__stats {
        flex-direction: column;
        gap: 1rem;
    }
}

/* Technology Advantages */
.technology-advantages {
    padding: 40px 0;
    background: white;
}

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

.tech-item {
    display: flex;
    flex-direction: column;
    text-align: left;
    padding: 0;
    background: #f8f9fa;
    transition: all 0.3s ease;
    overflow: hidden;
}

.tech-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.tech-icon {
    width: 100%;
    height: 120px;
    background: white;
    background-position: center;
    background-repeat: no-repeat;
    margin: 0;
    flex-shrink: 0;
}

.tech-item p {
    color: #333;
    font-weight: 500;
    margin: 0;
    padding: 0.5rem;
    text-align: center;
}

/* Customer Testimonials - Removed unused testimonial styles */

/* Contact Section */
.contact-section {
    padding: 40px 0;
    background: #f8f9fa;
}

.contact-section h2 {
    text-align: center;
    margin-bottom: 3rem;
    color: #333;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
    align-items: start;
}

.contact-form {
    order: 2;
    padding: 1.5rem;
}

.contact-form-inner {

    padding: 0.5rem;
  
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid #e9ecef;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: #fafafa;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #339933;
    background: white;
    box-shadow: 0 0 0 3px rgba(51, 153, 51, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Removed unused .contact-info style */

.contact-testimonials {
    order: 1;
    padding: 1rem 0;
    background-color: rgb(100, 100, 100);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    border: 1px solid #e9ecef;
}



.contact-testimonials h3 {
  color: #ffffff;
    margin-bottom: 1rem;
    font-size: 1.4rem;
    text-align: left;
    padding: 0 2rem;
}

.contact-testimonials .testimonial {
    margin-bottom: 2rem;
}

.contact-testimonials .testimonial blockquote {
    font-size: 1.1rem;
    line-height: 1.6;
    color: #555;
    font-style: italic;
    margin-bottom: 1rem;
    padding: 1.5rem;
    background: #f8f9fa;
    border-left: 4px solid #339933;
    border-radius: 8px;
}

.contact-testimonials .testimonial cite {
    display: block;
    text-align: right;
    color: #666;
    font-weight: 600;
    font-style: normal;
}

.contact-testimonials .testimonial-cta {
    text-align: center;
}

/* Testimonial Carousel in Contact Section */
.contact-testimonials .testimonial-carousel {
    position: relative;
    overflow: hidden;
}

.contact-testimonials .testimonial-track {
    display: flex;
    width: 100%;
    transition: transform 0.6s ease;
    will-change: transform;
}

.contact-testimonials .testimonial-slide {
    position: relative;
    min-height: 480px;
    flex: 0 0 100%;
    overflow: hidden;
}

.contact-testimonials .testimonial-slide picture {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
}

.contact-testimonials .testimonial-slide img.tcl-react-media__asset {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center center;
    transition: transform 0.3s ease;
}

.contact-testimonials .testimonial-slide::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0.15) 0%, rgba(0,0,0,0.35) 60%, rgba(0,0,0,0.5) 100%);
    z-index: 1;
}

.contact-testimonials .testimonial-content {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2;
    padding: 2rem 1.5rem;
    color: #fff;
    background: linear-gradient(transparent, rgba(0,0,0,0.1) 20%, rgba(0,0,0,0.4) 100%);
}

.contact-testimonials .testimonial-content blockquote {
    font-size: 1.1rem;
    line-height: 1.6;
    margin: 0 0 0.75rem;
    font-style: italic;
}

.contact-testimonials .testimonial-content cite {
    display: block;
    text-align: right;
    font-weight: 600;
    opacity: 0.9;
}

.contact-testimonials .testimonial-controls {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 0.5rem;
    z-index: 3;
}

.contact-testimonials .testimonial-btn {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.25);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.contact-testimonials .testimonial-btn:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: scale(1.04);
}

.contact-testimonials .testimonial-indicators {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    padding-top: 0.75rem;
    padding: 1rem;
}

.contact-testimonials .indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.25);
    border: none;
}

.contact-testimonials .indicator.active {
    background: #339933;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .contact-testimonials .testimonial-slide {
        min-height: 360px;
    }
    .contact-testimonials .testimonial-content blockquote {
        font-size: 1rem;
    }
}

/* Removed unused .contact-item styles */

/* Footer */
.footer {
    background: #333;
    color: white;
    padding: 60px 0 20px;
}

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

.footer-section h4 {
    color: white;
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

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

.footer-section ul li {
    margin-bottom: 0.1rem;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #339933;
}

.footer-logo img {
    height: 40px;
    width: auto;
    filter: brightness(0) invert(1);
}

.contact-details p {
    color: #ccc;
    margin-bottom: 0.5rem;
}

.contact-details strong {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #555;
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: #ccc;
    margin: 0;
}

/* Product Card Responsive Design */

/* Mobile Portrait (320px - 480px) */
@media (max-width: 480px) {
    .products-grid {
        grid-template-columns: 1fr;
        gap: 0.5rem;
    }
    
    .products-grid-large {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        margin-top: 1rem;
    }
    
    .container {
        padding: 0 20px;
    }
    
    .features-content {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .solutions-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .product-card {
        min-height: 250px;
    }
    
    .product-content {
        padding: 1rem;
    }
    
    .product-content h3 {
        font-size: 1.1rem;
        margin-bottom: 0.5rem;
    }
    
    .product-content p {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }
    
    .product-content .btn {
        font-size: 0.85rem;
        padding: 0.1rem 1rem;
    }
}

/* Mobile Landscape & Small Tablets (481px - 768px) */
@media (min-width: 481px) and (max-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
    }
    
    .products-grid-large {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        margin-top: 1.5rem;
    }
    
    .product-card {
        min-height: 280px;
    }
    
    .product-content {
        padding: 1.25rem;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }
    
    .contact-form {
        order: 2;
    }
    
    .contact-info {
        order: 3;
        padding: 1.8rem;
    }
    
    .contact-testimonials {
        order: 1;
        padding: 1.8rem;
    }
    
    .contact-testimonials h2 {
        font-size: 1.6rem;
        margin-bottom: 1.8rem;
    }
    
    .contact-form-inner {
        padding: 2rem;
    }
    
    .contact-item {
        margin-bottom: 2rem;
        padding: 1.2rem;
    }
    
    .product-content h3 {
        font-size: 1.15rem;
        margin-bottom: 0.5rem;
    }
    
    .product-content p {
        font-size: 0.875rem;
        margin-bottom: 0.875rem;
    }
}

/* Tablets Portrait (769px - 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }
    
    .products-grid-large {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.5rem;
        margin-top: 2rem;
    }
    
    .product-card {
        min-height: 320px;
    }
    
    .product-content {
        padding: 1.5rem;
    }
    
    .product-content h3 {
        font-size: 1.2rem;
        margin-bottom: 0.75rem;
    }
    
    .product-content p {
        font-size: 0.9rem;
        margin-bottom: 1rem;
    }
}

/* Desktop Small (1025px - 1200px) */
@media (min-width: 1025px) and (max-width: 1200px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }
    
    .product-card {
        min-height: 350px;
    }
    
    .product-content {
        padding: 1.75rem;
    }
    
    .product-content h3 {
        font-size: 1.3rem;
        margin-bottom: 0.75rem;
    }
    
    .product-content p {
        font-size: 0.95rem;
        margin-bottom: 1.25rem;
    }
}

/* Desktop Medium (1201px - 1600px) */
@media (min-width: 1201px) and (max-width: 1600px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
    }
    
    .product-card {
        min-height: 520px;
    }
    
    .product-content {
        padding: 2rem;
    }
    
    .product-content h3 {
        font-size: 1.4rem;
        margin-bottom: 1rem;
    }
    
    .product-content p {
        font-size: 1rem;
        margin-bottom: 1.5rem;
    }
}

/* Desktop Large (1601px - 1919px) */
@media (min-width: 1601px) and (max-width: 1919px) {
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 1rem;
        max-width: 1600px;
        margin: 0 auto;
    }
    
    .products-grid-large {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
        max-width: 1600px;
        margin: 0 auto;
    }
    
    .product-card {
        min-height: 450px;
        border-radius: 6px;
    }
    
    .product-content {
        padding: 2.5rem;
    }
    
    .product-content h3 {
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .product-content p {
        font-size: 1.1rem;
        margin-bottom: 1.75rem;
        line-height: 1.5;
    }
    
    .product-content .btn {
        font-size: 1rem;
        padding: 0.6rem 1.8rem;
        min-width: 150px;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }

    /* slide-style Banner Carousel Responsive */
    .banner-content {
        padding: 0 1.5rem;
        height: 100vh;
    }

    .banner-text {
        max-width: 100%;
    }

    .banner-text h1 {
        font-size: 4rem;
        margin-bottom: 1.5rem;
        line-height: 1.05;
        letter-spacing: -0.035em;
    }

    .banner-text p {
        font-size: 1.125rem;
        margin-bottom: 3rem;
        max-width: 500px;
        line-height: 1.4;
    }

    .banner-buttons {
        gap: 1.25rem;
        flex-direction: column;
        align-items: center;
    }

    .banner-buttons .btn {
        min-width: 260px;
        padding: 1.1rem 2.5rem;
        font-size: 0.95rem;
        letter-spacing: 0.6px;
    }

    .carousel-controls {
        padding: 0 1.5rem;
        opacity: 1;
    }

    .carousel-btn {
        width: 45px;
        height: 45px;
        background: rgba(0, 0, 0, 0.4);
    }

    .carousel-indicators {
        bottom: 2rem;
        gap: 0.6rem;
    }

    .indicator {
        width: 10px;
        height: 10px;
    }

    .nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 2rem 1.5rem;
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.12);
        border-top: 1px solid rgba(0, 0, 0, 0.08);
        gap: 0;
    }

    .nav.active {
        display: flex;
        animation: slideDown 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    .nav a {
        padding: 1rem 0;
        border-bottom: 1px solid rgba(0, 0, 0, 0.05);
        font-size: 16px;
        font-weight: 500;
        color: #171a20;
        text-align: center;
        transition: all 0.3s ease;
    }

    .nav a:last-child {
        border-bottom: none;
    }

    .nav a:hover {
        background: rgba(51, 153, 51, 0.05);
        color: #339933;
        transform: none;
    }

    .nav a::after {
        display: none;
    }

    .menu-toggle {
        display: flex;
        padding: 0.5rem;
        border-radius: 4px;
        transition: background 0.3s ease;
    }

    .menu-toggle:hover {
        background: rgba(0, 0, 0, 0.05);
    }

    .menu-toggle span {
        border-radius: 2px;
        transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

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

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

    .language-selector {
        display: none;
    }

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    h1 {
        font-size: 2.5rem;
    }

    h2 {
        font-size: 2rem;
    }

    .banner-content,
    .features-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .banner-text {
        order: 2;
        text-align: center;
    }

    /* Removed unused .banner-image style */

    .banner-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

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

    .solutions-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .tech-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-icon {
        height: 180px;
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }

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

    .main-banner {
        padding: 0 0 60px;
        min-height: 100vh;
    }

    .product-features,
    .product-showcase,
    .installation-solutions,
    .project-cases,
    .technology-advantages,
    .customer-testimonials,
    .contact-section {
        padding: 30px 0;
    }
}

@media (max-width: 480px) {
    h1 {
        font-size: 2rem;
    }

    /* slide-style Banner Carousel Mobile */
    .banner-content {
        padding: 0 1rem;
        height: 100vh;
    }

    .banner-text {
        max-width: 100%;
    }

    .banner-text h1 {
        font-size: 2.1rem;
        margin-bottom: 1.25rem;
        line-height: 1.1;
        letter-spacing: -0.03em;
    }

    .banner-text p {
        font-size: 1.0rem;
        margin-bottom: 2.5rem;
        line-height: 1.4;
        max-width: 400px;
    }

    .banner-buttons {
        gap: 1rem;
    }

    .banner-buttons .btn {
        min-width: 240px;
        padding: 1rem 2rem;
        font-size: 0.9rem;
        letter-spacing: 0.5px;
    }

    .carousel-controls {
        padding: 0 1rem;
        opacity: 1;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
        background: rgba(0, 0, 0, 0.5);
        border: 1px solid rgba(255, 255, 255, 0.3);
    }

    .carousel-indicators {
        bottom: 1.5rem;
        gap: 0.5rem;
    }

    .indicator {
        width: 6px;
        height: 6px;
    }

    .indicator.active {
        transform: scale(1.5);
    }

    /* Disable background attachment on mobile for better performance */
    .slide-background {
        background-attachment: scroll;
    }

    /* responsive image mobile optimization */
    .slide-responsive-img {
        background-attachment: scroll;
        transform: none;
        transition: none;
    }

    .banner-slide.active .slide-responsive-img {
        transform: scale(1.02);
        transition: transform 3s ease-out;
    }

    h2 {
        font-size: 1.75rem;
    }

    .banner-text p {
        font-size: 1.125rem;
    }

    .btn {
        padding: 10px 24px;
        font-size: 0.8rem;
        min-width: 140px;
        border-radius: 4px;
    }

    .product-card,
    .solution-card {
        padding: 1.5rem;
    }
    
    .tech-item {
        padding: 0;
    }
    
    .tech-icon {
        height: 150px;
        background-size: cover;
        background-position: center;
        background-repeat: no-repeat;
    }
    
    .tech-item p {
        padding: 1rem;
        font-size: 0.9rem;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .contact-form {
        order: 2;
    }
    
    .contact-info {
        order: 3;
        padding: 1.5rem;
    }
    
    .contact-testimonials {
        order: 1;
        padding: 1.5rem;
    }
    
    .contact-testimonials h2 {
        font-size: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .contact-testimonials .testimonial blockquote {
        font-size: 1rem;
        padding: 1rem;
    }
    
    .contact-form-inner {
        padding: 1.5rem;
    }
    
    .contact-item {
        margin-bottom: 1.5rem;
        padding: 1rem;
    }
    
    .contact-item h4 {
        font-size: 1rem;
    }

    .testimonial blockquote {
        font-size: 1.25rem;
    }

    /* Product Features Mobile Styles */
    .features-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .features-text {
        min-height: 400px;
        justify-content: center;
    }

    .features-text-content {
        padding: 2rem;
        max-width: 350px;
        text-align: center;
    }

    .features-text-content h2 {
        font-size: 1.75rem;
    }

    .features-text-content p {
        font-size: 1rem;
    }

    .features-image {
        min-height: 400px;
        order: -1;
        justify-content: center;
        padding-left: 1rem;
    }

    .features-image-content {
        padding: 2rem;
        max-width: 350px;
        text-align: center;
    }

    .features-image-content h3 {
        font-size: 1.5rem;
    }

    .features-image-content p {
        font-size: 1rem;
    }

    .features-image-buttons {
        flex-direction: column;
        align-items: center;
    }

    .features-image-buttons .btn {
        min-width: 200px;
    }
}

/* Tablet Styles */
@media (max-width: 768px) and (min-width: 600px) {
    .features-text {
        min-height: 450px;
        justify-content: center;
    }

    .features-text-content {
        padding: 2.5rem;
        max-width: 400px;
        text-align: center;
    }

    .features-text-content h2 {
        font-size: 2rem;
    }

    .features-image {
        min-height: 450px;
        justify-content: center;
        padding-left: 2rem;
    }

    .features-image-content {
        padding: 2.5rem;
        max-width: 380px;
        text-align: center;
    }

    .features-image-content h3 {
        font-size: 1.75rem;
    }
}

/* Animation Classes - Removed unused fade-in and slide-in animations */

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Product Hero Section Styles */
.banner-text {
    text-align: center;
}

.banner-text h1 {
    text-align: center;
}

.banner-text p {
    text-align: center;
}

.breadcrumb {
    text-align: center;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: white;
}

.breadcrumb span {
    color: white;
    font-weight: 500;
}

/* Product Highlights - 3 columns layout */
.product-highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 2.5rem 0;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.highlight-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    color: white;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.highlight-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.highlight-item svg {
    width: 32px;
    height: 32px;
    margin-bottom: 0.75rem;
    color: #339933;
}

.highlight-item span {
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.3;
}

/* Banner Buttons - 2 columns layout */
.banner-buttons {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    justify-content: center;
    max-width: 400px;
    margin: 0 auto;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .product-highlights {
        grid-template-columns: 1fr;
        gap: 1rem;
        margin: 2rem 0;
    }
    
    .banner-buttons {
        grid-template-columns: 1fr;
        max-width: 250px;
    }
    
    .highlight-item {
        padding: 0.75rem;
    }
    
    .highlight-item svg {
        width: 28px;
        height: 28px;
    }
    
    .highlight-item span {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .product-highlights {
        margin: 1.5rem 0;
    }
    
    .banner-buttons {
        gap: 1rem;
    }
}

/* New Independent Styles for Second Product Features Section */
.product-features-reversed {
    padding: 30px 0;
    background: #f5f7fa;
    border-top: 1px solid #e1e8ed;
    border-bottom: 1px solid #e1e8ed;
}

.product-features-reversed .container {
    margin: 0 auto;
}

.product-features-reversed .features-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

/* Text content on the left */
.product-features-reversed .features-text-section {
    order: 1;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.product-features-reversed .features-text-section h2 {
    font-size: 2.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    text-align: left;
    margin-bottom: 1rem;
    color: #1a202c;
}

.product-features-reversed .features-text-section > p {
    font-size: 1.2rem;
    line-height: 1.6;
    color: #4a5568;
    margin-bottom: 1.5rem;
}

.product-features-reversed .features-items-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.product-features-reversed .feature-row {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.product-features-reversed .feature-icon-wrapper {
    width: 52px;
    height: 52px;
    background: #e2e8f0;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    border: 1px solid #cbd5e0;
}

.product-features-reversed .feature-icon-wrapper img {
    width: 32px;
    height: 32px;
}

.product-features-reversed .feature-text-content {
    flex: 1;
}

.product-features-reversed .feature-text-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: 0 0 0.5rem;
    color: #2d3748;
    letter-spacing: -0.01em;
}

.product-features-reversed .feature-text-content p {
    font-size: 1rem;
    color: #718096;
    line-height: 1.6;
    margin: 0;
}

/* Image section on the right */
.product-features-reversed .features-image-section {
    order: 2;
    position: relative;
    min-height: 520px;
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #e2e8f0;
}

.product-features-reversed .features-responsive-picture {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.product-features-reversed .features-main-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* Mobile responsive styles - vertical stacking with natural order */
@media (max-width: 768px) {
    .product-features-reversed .features-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .product-features-reversed .features-text-section {
        order: 1; /* Text first on mobile */
    }
    
    .product-features-reversed .features-image-section {
        order: 2; /* Image second on mobile */
        min-height: 350px;
    }
    
    .product-features-reversed .features-text-section h2 {
        font-size: 1.875rem;
        text-align: center;
    }
    
    .product-features-reversed .features-text-section > p {
        font-size: 1.1rem;
        text-align: center;
    }
    
    .product-features-reversed .feature-row {
        gap: 0.875rem;
    }
    
    .product-features-reversed .feature-icon-wrapper {
        width: 48px;
        height: 48px;
    }
    
    .product-features-reversed .feature-icon-wrapper img {
        width: 28px;
        height: 28px;
    }
    
    .product-features-reversed .feature-text-content h3 {
        font-size: 1.125rem;
    }
    
    .product-features-reversed .feature-text-content p {
        font-size: 0.95rem;
    }
}

/* Tablet styles */
@media (max-width: 1024px) and (min-width: 769px) {
    .product-features-reversed .features-layout {
        gap: 2.5rem;
    }
    
    .product-features-reversed .features-image-section {
        min-height: 450px;
    }
    
    .product-features-reversed .features-text-section h2 {
        font-size: 2rem;
    }
    
    .product-features-reversed .features-text-section > p {
        font-size: 1.125rem;
    }
}

/* Technical Specifications */
.specifications-section {
    padding: 40px 0;
    background: white;
}

.specifications-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.spec-category {
    background: #f8f9fa;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    transition: all 0.3s ease;
}

.spec-category:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 24px rgba(0, 0, 0, 0.08);
}

.spec-media {
    position: relative;
    width: 100%;
    background: #fff;
}

.spec-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    align-items: flex-start;
    padding: 0.75rem 1rem;
    background: transparent;
}

.spec-overlay h3 {
    margin: 0;
    font-size: 1.25rem;
    color: #fff;
}

.spec-overlay p {
    margin: 0.25rem 0 0;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.9);
}

.spec-picture,
.spec-image {
    display: block;
    width: 100%;
    height: 100%;
}

.spec-image {
    object-fit: cover;
    object-position: center;
}

.spec-category h3 {
    font-size: 1.25rem;
    color: #ffffff;

}

/* Removed unused .spec-grid and .spec-item styles */

.spec-label {
    color: #555;
    font-weight: 500;
}

.spec-value {
    color: #171a20;
    font-weight: 600;
}

/* Responsive - Small phones */
@media (max-width: 480px) {
    .specifications-content {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    .spec-media {
        height: clamp(140px, 25vh, 240px);
    }
    .spec-category h3 {
        font-size: 1.1rem;    }
}

/* Responsive - Mobile & small tablets */
@media (min-width: 481px) and (max-width: 768px) {
    .specifications-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }
    .spec-media {
        height: clamp(160px, 28vh, 280px);
    }
}

/* Responsive - Tablets */
@media (min-width: 769px) and (max-width: 1024px) {
    .specifications-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* Wide screens */
@media (min-width: 1600px) {
    .specifications-content {
        gap: 1rem;
    }
}

/* ========================================
   NEW PRODUCT FEATURES SECTION STYLES
   ======================================== */

/* 重新设计的产品特性部分 - 独立样式 */
.product-features-section {
    padding: 30px 0;
    background: #ffffff;
}

.product-features-section .container {
    margin: 0 auto;
    padding: 0 60px;
}

/* 主要布局容器 */
.product-features-section .features-overview {
    display: flex;
    align-items: center;
    gap: 40px;
    min-height: 500px;
}

/* 图片部分 - 左侧 */
.product-features-section .features-image {
    flex: 1;
    position: relative;
    min-height: 500px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-features-section .features-responsive-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.product-features-section .features-background-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

/* 内容部分 - 右侧 */
.product-features-section .features-overview-content {
    flex: 1;
    padding: 20px 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.product-features-section .features-overview-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #171a20;
    margin-bottom: 16px;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.product-features-section .features-overview-content > p {
    font-size: 1.25rem;
    color: #555;
    line-height: 1.6;
    margin-bottom: 32px;
}

/* 特性列表 */
.product-features-section .features-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.product-features-section .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 0;
}

.product-features-section .feature-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.product-features-section .feature-icon img {
    width: 32px;
    height: 32px;
}

.product-features-section .feature-item-content {
    flex: 1;
}

.product-features-section .feature-item-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: #171a20;
    margin: 0 0 8px 0;
    line-height: 1.3;
}

.product-features-section .feature-item-content p {
    font-size: 1rem;
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 平板端适配 */
@media (max-width: 1024px) {
    .product-features-section {
        padding: 40px 0;
    }
    
    .product-features-section .features-overview {
        gap: 30px;
    }
    
    .product-features-section .features-overview-content h2 {
        font-size: 2.25rem;
    }
    
    .product-features-section .features-overview-content > p {
        font-size: 1.125rem;
    }
}

/* 移动端适配 - 垂直堆叠，顺序自然 */
@media (max-width: 768px) {
    .product-features-section {
        padding: 30px 0;
    }
    
    .product-features-section .container {
        padding: 0 16px;
    }
    
    .product-features-section .features-overview {
        flex-direction: column;
        gap: 30px;
        min-height: auto;
    }
    
    .product-features-section .features-image {
        width: 100%;
        min-height: 300px;
        order: 1; /* 图片在上 */
    }
    
    .product-features-section .features-overview-content {
        width: 100%;
        padding: 0;
        order: 2; /* 内容在下 */
    }
    
    .product-features-section .features-overview-content h2 {
        font-size: 2rem;
        text-align: center;
        margin-bottom: 12px;
    }
    
    .product-features-section .features-overview-content > p {
        font-size: 1.125rem;
        text-align: center;
        margin-bottom: 24px;
    }
    
    .product-features-section .features-list {
        gap: 20px;
    }
    
    .product-features-section .feature-item {
        gap: 12px;
    }
    
    .product-features-section .feature-icon {
        width: 50px;
        height: 50px;
    }
    
    .product-features-section .feature-icon img {
        width: 28px;
        height: 28px;
    }
    
    .product-features-section .feature-item-content h3 {
        font-size: 1.125rem;
    }
    
    .product-features-section .feature-item-content p {
        font-size: 0.95rem;
    }
}

/* 小屏手机适配 */
@media (max-width: 480px) {
    .product-features-section {
        padding: 20px 0;
    }
    
    .product-features-section .features-image {
        min-height: 250px;
    }
    
    .product-features-section .features-overview-content h2 {
        font-size: 1.75rem;
    }
    
    .product-features-section .features-overview-content > p {
        font-size: 1rem;
    }
    
    .product-features-section .feature-item-content h3 {
        font-size: 1rem;
    }
    
    .product-features-section .feature-item-content p {
        font-size: 0.9rem;
    }
}