* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { font-family: 'Microsoft YaHei', 'PingFang SC', Arial, sans-serif; color: #333; line-height: 1.6; background: #f8f8f8; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

header { background: rgba(255,255,255,0.95); box-shadow: 0 2px 10px rgba(0,0,0,0.1); position: fixed; top: 0; left: 0; right: 0; z-index: 1000; }
header .logo { float: left; padding: 10px 0; }
header .logo h1 { font-size: 24px; color: #5D4E37; font-weight: bold; }
header .logo p { font-size: 12px; color: #888; }
header .logo a { display: flex; align-items: center; text-decoration: none; }
header .logo .logo-img { height: 50px; width: auto; max-width: 200px; }
header nav { float: right; }
header nav ul { list-style: none; display: flex; }
header nav ul li { position: relative; }
header nav ul li a { display: block; padding: 20px 25px; color: #333; text-decoration: none; transition: all 0.3s; font-size: 15px; }
header nav ul li a:hover, header nav ul li a.active { color: #5D4E37; background: rgba(93,78,55,0.05); }
header nav ul li .sub-menu { display: none; position: absolute; top: 100%; left: 0; background: #fff; box-shadow: 0 5px 15px rgba(0,0,0,0.1); min-width: 200px; z-index: 100; }
header nav ul li .sub-menu li { border-bottom: 1px solid #eee; }
header nav ul li .sub-menu li:last-child { border-bottom: none; }
header nav ul li .sub-menu li a { padding: 12px 20px; }
header nav ul li:hover .sub-menu { display: block; }
header .mobile-menu-btn { display: none; float: right; margin: 15px; font-size: 24px; background: none; border: none; cursor: pointer; color: #5D4E37; }
header .mobile-nav { display: none; clear: both; padding: 10px 20px; border-top: 1px solid #eee; }
header .mobile-nav ul { list-style: none; }
header .mobile-nav ul li { margin-bottom: 10px; }
header .mobile-nav ul li a { display: block; padding: 10px; color: #333; text-decoration: none; }
header .mobile-nav ul li a.active { color: #5D4E37; font-weight: bold; }

.banner { margin-top: 70px; position: relative; overflow: hidden; }
.page-banner { margin-top: 70px; height: 200px; background: linear-gradient(135deg, rgba(93,78,55,0.7) 0%, rgba(139,115,85,0.7) 100%), url('/uploads/1782971598______________20260702135234_26_11.png'); background-size: cover; background-position: center; position: relative; display: flex; align-items: center; justify-content: center; }
.page-banner::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.3); }
.page-banner .banner-content { position: relative; z-index: 1; text-align: center; color: #fff; }
.page-banner .banner-content h1 { font-size: 32px; margin-bottom: 10px; }
.banner .banner-list { display: flex; transition: transform 0.5s ease; }
.banner .banner-list .banner-item { min-width: 100%; height: 500px; background-size: cover; background-position: center; position: relative; }
.banner .banner-list .banner-item::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.4); }
.banner .banner-list .banner-item .banner-content { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); text-align: center; color: #fff; }
.banner .banner-list .banner-item .banner-content h2 { font-size: 48px; margin-bottom: 20px; font-weight: bold; }
.banner .banner-list .banner-item .banner-content p { font-size: 18px; margin-bottom: 30px; }
.banner .banner-list .banner-item .banner-content a { display: inline-block; padding: 12px 30px; background: #5D4E37; color: #fff; text-decoration: none; border-radius: 5px; transition: background 0.3s; }
.banner .banner-list .banner-item .banner-content a:hover { background: #4A3E2E; }
.banner .banner-dots { position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%); display: flex; }
.banner .banner-dots span { width: 12px; height: 12px; background: rgba(255,255,255,0.5); border-radius: 50%; margin: 0 5px; cursor: pointer; transition: all 0.3s; }
.banner .banner-dots span.active { background: #fff; }
.banner .banner-arrow { position: absolute; top: 50%; transform: translateY(-50%); width: 40px; height: 40px; background: rgba(255,255,255,0.3); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 20px; cursor: pointer; transition: background 0.3s; }
.banner .banner-arrow:hover { background: rgba(255,255,255,0.5); }
.banner .banner-arrow.prev { left: 20px; }
.banner .banner-arrow.next { right: 20px; }

.section { padding: 60px 0; }
.section-title { text-align: center; margin-bottom: 40px; }
.section-title h2 { font-size: 32px; color: #5D4E37; margin-bottom: 10px; }
.section-title p { font-size: 16px; color: #888; }

.about { background: #fff; }
.about .about-content { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.about .about-content .about-text h3 { font-size: 24px; color: #5D4E37; margin-bottom: 20px; }
.about .about-content .about-text p { margin-bottom: 15px; color: #666; }
.about .about-content .about-image { height: 400px; background: linear-gradient(135deg, #8B7355 0%, #5D4E37 100%); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 48px; overflow: hidden; }
.about .about-content .about-image img { width: 100%; height: 100%; object-fit: cover; }

.product-tabs { display: flex; gap: 15px; justify-content: center; margin-bottom: 40px; flex-wrap: wrap; }
.product-tabs .tab-btn { padding: 16px 40px; border: 2px solid #ddd; background: #fff; border-radius: 40px; cursor: pointer; font-size: 17px; font-weight: 600; color: #666; transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1); position: relative; overflow: hidden; }
.product-tabs .tab-btn::before { content: ''; position: absolute; top: 50%; left: 50%; width: 0; height: 0; background: rgba(139, 115, 85, 0.1); border-radius: 50%; transform: translate(-50%, -50%); transition: width 0.6s ease, height 0.6s ease; }
.product-tabs .tab-btn:hover::before { width: 300px; height: 300px; }
.product-tabs .tab-btn:hover { border-color: #8B7355; color: #5D4E37; background: #fdf8f2; transform: translateY(-2px); box-shadow: 0 6px 20px rgba(93, 78, 55, 0.15); }
.product-tabs .tab-btn.active { background: linear-gradient(135deg, #8B7355 0%, #5D4E37 100%); border-color: #5D4E37; color: #fff; box-shadow: 0 10px 30px rgba(93, 78, 55, 0.45); transform: translateY(-4px); }
.product-tabs .tab-btn.active::before { background: rgba(255, 255, 255, 0.1); }

.product-grid-container { display: flex; flex-wrap: wrap; gap: 24px; }
.product-category-group { display: none; }
.product-category-group.active { display: flex; flex-wrap: wrap; gap: 24px; width: 100%; }

.product-grid-container .product-link { display: flex; flex-direction: column; width: calc(25% - 18px); text-decoration: none !important; }
.product-grid-container .product-link * { text-decoration: none !important; }
.product-grid-container .product-item { background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 15px rgba(0,0,0,0.06); transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; flex: 1; }
.product-grid-container .product-item:hover { transform: translateY(-8px); box-shadow: 0 12px 30px rgba(0,0,0,0.12); }
.product-grid-container .product-item .product-image { height: 220px; background: #fafafa; overflow: hidden; position: relative; }
.product-grid-container .product-item .product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.product-grid-container .product-item:hover .product-image img { transform: scale(1.05); }
.product-grid-container .product-item .product-image span { display: flex; align-items: center; justify-content: center; height: 100%; }
.product-grid-container .product-item .product-info { padding: 20px; text-align: center; flex: 1; display: flex; align-items: center; justify-content: center; }
.product-grid-container .product-item .product-info h3 { font-size: 16px; color: #5D4E37; margin-bottom: 0; font-weight: 600; line-height: 1.5; text-decoration: none; }
.product-grid-container .product-link:link h3,
.product-grid-container .product-link:visited h3,
.product-grid-container .product-link:hover h3,
.product-grid-container .product-link:active h3 { color: #5D4E37; text-decoration: none; }

.cases { background: #fff; }
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.case-item { display: block; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.05); transition: transform 0.3s, box-shadow 0.3s; text-decoration: none; }
.case-item:hover { transform: translateY(-5px); box-shadow: 0 10px 25px rgba(0,0,0,0.1); }
.case-item .case-image { height: 220px; background: #eee; background-size: cover; background-position: center; }
.case-item .case-info { padding: 20px; }
.case-item .case-info h3 { font-size: 18px; color: #333; margin-bottom: 10px; }
.case-item .case-info p { font-size: 14px; color: #888; line-height: 1.6; }
.case-item .case-info .view-detail { display: inline-block; margin-top: 10px; color: #5D4E37; font-size: 14px; }

.news { background: #f8f8f8; }
.news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.news-item { display: block; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.05); transition: transform 0.3s; text-decoration: none; }
.news-item:hover { transform: translateY(-3px); }
.news-item .news-image { height: 180px; background: #eee; background-size: cover; background-position: center; }
.news-item .news-info { padding: 20px; }
.news-item .news-info h3 { font-size: 18px; color: #333; margin-bottom: 10px; line-height: 1.4; }
.news-item .news-info p { font-size: 14px; color: #888; margin-bottom: 10px; }
.news-item .news-info .news-date { font-size: 12px; color: #aaa; }
.news-item.no-image { grid-column: span 3; display: flex; align-items: center; }
.news-item.no-image .news-info { flex: 1; }

.related-news-section h3 { font-size: 20px; color: #5D4E37; margin-bottom: 20px; }
.related-news-list { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.related-news-item { background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 2px 10px rgba(0,0,0,0.05); transition: transform 0.3s; }
.related-news-item:hover { transform: translateY(-3px); }
.related-news-item.has-image { display: flex; flex-direction: column; }
.related-news-item.has-image .related-news-image { height: 120px; background: #eee; background-size: cover; background-position: center; }
.related-news-item.has-image .related-news-info { padding: 12px; flex: 1; display: flex; flex-direction: column; }
.related-news-item.has-image .related-news-info h3 { font-size: 14px; color: #333; margin-bottom: 8px; line-height: 1.4; }
.related-news-item.has-image .related-news-date { font-size: 12px; color: #aaa; margin-top: auto; }
.related-news-item.no-image { grid-column: span 3; display: flex; align-items: center; padding: 15px 20px; }
.related-news-item.no-image .related-news-info h3 { font-size: 16px; color: #333; margin-bottom: 5px; }
.related-news-item.no-image .related-news-date { font-size: 12px; color: #aaa; }

.faqs { background: #fff; }
.faqs .faq-list { max-width: 800px; margin: 0 auto; }
.faqs .faq-list .faq-item { margin-bottom: 15px; border: 1px solid #eee; border-radius: 8px; overflow: hidden; }
.faqs .faq-list .faq-item .faq-question { padding: 20px; background: #fafafa; cursor: pointer; display: flex; justify-content: space-between; align-items: center; transition: background 0.3s; }
.faqs .faq-list .faq-item .faq-question:hover { background: #f5f5f5; }
.faqs .faq-list .faq-item .faq-question h4 { font-size: 16px; color: #333; }
.faqs .faq-list .faq-item .faq-question span { font-size: 20px; color: #5D4E37; transition: transform 0.3s; }
.faqs .faq-list .faq-item.active .faq-question span { transform: rotate(180deg); }
.faqs .faq-list .faq-item .faq-answer { padding: 0 20px; max-height: 0; overflow: hidden; transition: max-height 0.3s, padding 0.3s; }
.faqs .faq-list .faq-item.active .faq-answer { padding: 20px; max-height: 500px; }
.faqs .faq-list .faq-item .faq-answer p { color: #666; }

.contact-section { background: #5D4E37; color: #fff; }
.contact-section .contact-info { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; text-align: center; }
.contact-section .contact-info .info-item h3 { font-size: 18px; margin-bottom: 10px; }
.contact-section .contact-info .info-item p { font-size: 14px; opacity: 0.9; }

footer { background: #333; color: #ccc; padding: 40px 0; }
footer .footer-content { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
footer .footer-content .footer-item h3 { font-size: 18px; color: #fff; margin-bottom: 20px; }
footer .footer-content .footer-item ul { list-style: none; }
footer .footer-content .footer-item ul li { margin-bottom: 10px; }
footer .footer-content .footer-item ul li a { color: #ccc; text-decoration: none; transition: color 0.3s; }
footer .footer-content .footer-item ul li a:hover { color: #5D4E37; }
footer .footer-content .footer-item p { font-size: 14px; line-height: 1.8; }
footer .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid #444; margin-top: 20px; font-size: 14px; }
footer .footer-bottom a { color: #5D4E37; text-decoration: none; }

.breadcrumb { background: #f5f5f5; padding: 15px 0; }
.breadcrumb .container { display: flex; align-items: center; }
.breadcrumb .container a { color: #5D4E37; text-decoration: none; }
.breadcrumb .container span { margin: 0 10px; color: #888; }
.breadcrumb .container .current { color: #333; font-weight: bold; }

.page-content { padding: 40px 0; background: #fff; }
.page-content h1 { font-size: 32px; color: #5D4E37; margin-bottom: 30px; }
.page-content h2 { font-size: 24px; color: #333; margin: 30px 0 15px; }
.page-content p { margin-bottom: 15px; color: #666; line-height: 1.8; }
.page-content img { max-width: 100%; height: auto; border-radius: 8px; margin: 15px 0; }

.product-sidebar { width: 250px; flex-shrink: 0; }
.product-sidebar h3 { font-size: 18px; color: #5D4E37; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid #5D4E37; }
.product-sidebar ul { list-style: none; }
.product-sidebar ul li { margin-bottom: 5px; }
.product-sidebar ul li a { display: block; padding: 12px 15px; color: #333; text-decoration: none; border-radius: 5px; transition: background 0.3s; }
.product-sidebar ul li a:hover, .product-sidebar ul li a.active { background: #5D4E37; color: #fff; }
.product-sidebar .sub-cat { padding-left: 20px; }

.product-main { flex: 1; min-width: 0; }
.product-main .product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.product-main .product-grid .product-link { display: block; text-decoration: none !important; }
.product-main .product-grid .product-link * { text-decoration: none !important; }
.product-main .product-grid .product-item { background: #fff; border-radius: 12px; overflow: hidden; box-shadow: 0 4px 15px rgba(0,0,0,0.06); transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.35s cubic-bezier(0.4, 0, 0.2, 1); }
.product-main .product-grid .product-item:hover { transform: translateY(-8px); box-shadow: 0 12px 30px rgba(0,0,0,0.12); }
.product-main .product-grid .product-item .product-image { height: 220px; background: #fafafa; overflow: hidden; position: relative; }
.product-main .product-grid .product-item .product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.product-main .product-grid .product-item:hover .product-image img { transform: scale(1.05); }
.product-main .product-grid .product-item .product-image span { display: flex; align-items: center; justify-content: center; height: 100%; }
.product-main .product-grid .product-item .product-info { padding: 20px; text-align: center; }
.product-main .product-grid .product-item .product-info h3 { font-size: 16px; color: #5D4E37; margin-bottom: 0; font-weight: 600; line-height: 1.5; text-decoration: none; }
.product-main .product-grid .product-link:link h3,
.product-main .product-grid .product-link:visited h3,
.product-main .product-grid .product-link:hover h3,
.product-main .product-grid .product-link:active h3 { color: #5D4E37; text-decoration: none; }

.product-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.product-detail .product-images { position: relative; }
.product-detail .product-images .main-image { height: 450px; background: #fff; border: 1px solid #eee; border-radius: 10px; overflow: hidden; }
.product-detail .product-images .main-image img { width: 100%; height: 100%; object-fit: cover; }
.product-detail .product-images .thumbnails { display: flex; gap: 10px; margin-top: 15px; overflow-x: auto; }
.product-detail .product-images .thumbnails img { width: 80px; height: 80px; object-fit: cover; cursor: pointer; border: 2px solid transparent; border-radius: 5px; transition: border-color 0.3s; }
.product-detail .product-images .thumbnails img.active { border-color: #5D4E37; }
.product-detail .product-info h1 { font-size: 28px; margin-bottom: 20px; }
.product-detail .product-info .product-category { color: #888; margin-bottom: 20px; }
.product-detail .product-info .product-params { background: #f8f8f8; padding: 20px; border-radius: 8px; margin-bottom: 20px; }
.product-detail .product-info .product-params h3 { font-size: 16px; margin-bottom: 15px; }
.product-detail .product-info .product-params ul { list-style: none; }
.product-detail .product-info .product-params ul li { padding: 8px 0; border-bottom: 1px solid #eee; }
.product-detail .product-info .product-params ul li:last-child { border-bottom: none; }
.product-detail .product-info .product-params ul li span:first-child { color: #888; margin-right: 10px; }
.product-detail .product-info .geo-tags { margin-bottom: 20px; }
.product-detail .product-info .geo-tags span { display: inline-block; padding: 5px 12px; background: #5D4E37; color: #fff; border-radius: 20px; font-size: 12px; margin-right: 8px; }

.related-products { margin-top: 50px; padding-top: 30px; border-top: 1px solid #eee; }
.related-products h3 { font-size: 22px; color: #5D4E37; margin-bottom: 24px; text-align: center; }
.related-products .related-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.related-products .related-grid .product-link { display: block; text-decoration: none !important; }
.related-products .related-grid .product-link * { text-decoration: none !important; }
.related-products .related-grid .product-item { background: #fff; border-radius: 10px; overflow: hidden; box-shadow: 0 4px 12px rgba(0,0,0,0.06); transition: transform 0.3s ease, box-shadow 0.3s ease; }
.related-products .related-grid .product-item:hover { transform: translateY(-6px); box-shadow: 0 10px 25px rgba(0,0,0,0.12); }
.related-products .related-grid .product-item .product-image { height: 180px; background: #fafafa; overflow: hidden; }
.related-products .related-grid .product-item .product-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.35s ease; }
.related-products .related-grid .product-item:hover .product-image img { transform: scale(1.05); }
.related-products .related-grid .product-item .product-info { padding: 15px; text-align: center; }
.related-products .related-grid .product-item .product-info h3 { font-size: 15px; color: #5D4E37; margin-bottom: 0; font-weight: 600; line-height: 1.4; }

.case-detail .case-images { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; margin: 20px 0; }
.case-detail .case-images img { width: 100%; height: 200px; object-fit: cover; border-radius: 8px; cursor: pointer; transition: transform 0.3s; }
.case-detail .case-images img:hover { transform: scale(1.05); }
.case-detail .project-params { background: #f8f8f8; padding: 20px; border-radius: 8px; margin: 20px 0; }
.case-detail .project-params h3 { font-size: 18px; margin-bottom: 15px; }
.case-detail .project-params ul { list-style: none; }
.case-detail .project-params ul li { padding: 8px 0; border-bottom: 1px solid #eee; }
.case-detail .project-params ul li:last-child { border-bottom: none; }

.news-detail h1 { font-size: 32px; margin-bottom: 20px; }
.news-detail .news-meta { color: #888; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 1px solid #eee; }
.news-detail .news-meta span { margin-right: 20px; }
.news-detail .news-content { font-size: 16px; line-height: 1.8; color: #333; }
.news-detail .news-content img { max-width: 100%; height: auto; margin: 20px 0; }
.news-detail .news-content h2 { font-size: 22px; margin: 25px 0 15px; }
.news-detail .news-content h3 { font-size: 18px; margin: 20px 0 10px; }
.news-detail .news-content p { margin-bottom: 15px; }
.news-detail .news-nav { display: flex; justify-content: space-between; margin-top: 40px; padding-top: 20px; border-top: 1px solid #eee; }
.news-detail .news-nav a { color: #5D4E37; text-decoration: none; }
.news-detail .news-nav a:hover { text-decoration: underline; }

.contact-page { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-page .contact-info { background: #f8f8f8; padding: 30px; border-radius: 10px; }
.contact-page .contact-info h3 { font-size: 20px; color: #5D4E37; margin-bottom: 20px; }
.contact-page .contact-info .info-list { list-style: none; }
.contact-page .contact-info .info-list li { padding: 15px 0; border-bottom: 1px solid #eee; }
.contact-page .contact-info .info-list li:last-child { border-bottom: none; }
.contact-page .contact-info .info-list li span { color: #888; margin-right: 10px; }
.contact-page .contact-form { background: #fff; padding: 30px; border-radius: 10px; box-shadow: 0 2px 10px rgba(0,0,0,0.05); }
.contact-page .contact-form h3 { font-size: 20px; color: #5D4E37; margin-bottom: 20px; }
.contact-page .contact-form .form-group { margin-bottom: 20px; }
.contact-page .contact-form .form-group label { display: block; margin-bottom: 8px; color: #333; font-weight: bold; }
.contact-page .contact-form .form-group input, .contact-page .contact-form .form-group textarea { width: 100%; padding: 12px; border: 1px solid #ddd; border-radius: 5px; font-size: 14px; }
.contact-page .contact-form .form-group textarea { min-height: 150px; }
.contact-page .contact-form .btn { width: 100%; padding: 12px; background: #5D4E37; color: #fff; border: none; border-radius: 5px; font-size: 16px; cursor: pointer; transition: background 0.3s; }
.contact-page .contact-form .btn:hover { background: #4A3E2E; }

.category-filter { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 30px; }
.category-filter a { display: inline-block; padding: 10px 20px; border: 1px solid #ddd; background: #fff; border-radius: 5px; cursor: pointer; transition: all 0.3s; text-decoration: none; color: #333; }
.category-filter a:hover, .category-filter a.active { background: #5D4E37; color: #fff; border-color: #5D4E37; }

.pagination { display: flex; justify-content: center; margin-top: 40px; }
.pagination a { padding: 10px 15px; margin: 0 5px; background: #fff; border: 1px solid #ddd; border-radius: 5px; text-decoration: none; color: #333; transition: all 0.3s; }
.pagination a:hover, .pagination a.active { background: #5D4E37; color: #fff; border-color: #5D4E37; }
.pagination-info { padding: 10px 15px; margin: 0 5px; color: #999; font-size: 14px; }

.image-modal { display: none; position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.8); z-index: 2000; justify-content: center; align-items: center; }
.image-modal img { max-width: 90%; max-height: 90%; }
.image-modal .close { position: absolute; top: 20px; right: 20px; color: #fff; font-size: 30px; cursor: pointer; }

.loading { display: inline-block; width: 20px; height: 20px; border: 2px solid #5D4E37; border-top-color: transparent; border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

@media (max-width: 992px) {
    header nav { display: none; }
    header .mobile-menu-btn { display: block; }
    .about .about-content { grid-template-columns: 1fr; }
    .products .product-grid { grid-template-columns: repeat(2, 1fr); }
    .product-grid-container .product-link { width: calc(50% - 12px); }
    .product-tabs .tab-btn { padding: 14px 28px; font-size: 16px; }
    .case-grid { grid-template-columns: repeat(2, 1fr); }
    .news-list { grid-template-columns: repeat(2, 1fr); }
    .contact-section .contact-info { grid-template-columns: repeat(2, 1fr); }
    footer .footer-content { grid-template-columns: repeat(2, 1fr); }
    .product-sidebar { float: none; width: 100%; margin-right: 0; margin-bottom: 30px; }
    .product-sidebar ul { display: flex; flex-wrap: wrap; }
    .product-sidebar ul li { margin-right: 10px; }
    .product-main .product-grid { grid-template-columns: repeat(2, 1fr); }
    .product-detail { grid-template-columns: 1fr; }
    .related-products .related-grid { grid-template-columns: repeat(2, 1fr); }
    .case-detail .case-images { grid-template-columns: repeat(2, 1fr); }
    .contact-page { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .banner .banner-list .banner-item { height: 350px; }
    .banner .banner-list .banner-item .banner-content h2 { font-size: 28px; }
    .banner .banner-list .banner-item .banner-content p { font-size: 14px; }
    .products .product-grid { grid-template-columns: 1fr; }
    .product-grid-container .product-link { width: 100%; }
    .product-tabs .tab-btn { padding: 12px 20px; font-size: 15px; }
    .case-grid { grid-template-columns: 1fr; }
    .news-list { grid-template-columns: 1fr; }
    .contact-section { padding: 20px 0; }
    .contact-section .contact-info { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .contact-section .contact-info .info-item h3 { font-size: 14px; margin-bottom: 5px; }
    .contact-section .contact-info .info-item p { font-size: 12px; }
    footer .footer-content { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    footer .footer-content .footer-item ul { display: flex; flex-wrap: wrap; gap: 10px; }
    footer .footer-content .footer-item ul li { margin-bottom: 5px; }
    footer .footer-content .footer-item h3 { font-size: 15px; margin-bottom: 10px; }
    footer .footer-content .footer-item p { font-size: 12px; }
    footer { padding: 25px 0; }
    footer .footer-bottom { padding-top: 15px; margin-top: 15px; font-size: 12px; }
    .page-content .container { flex-direction: column; }
    .product-sidebar { width: 100%; margin-right: 0; margin-bottom: 20px; }
    .product-sidebar ul { display: flex; flex-wrap: wrap; gap: 8px; }
    .product-sidebar ul li { margin-bottom: 5px; }
    .product-sidebar ul li a { padding: 8px 15px; font-size: 14px; }
    .product-sidebar .sub-cat { padding-left: 0; }
    .product-main { width: 100%; }
    .product-main .product-grid { grid-template-columns: repeat(2, 1fr); gap: 15px; }
    .product-main .product-grid .product-item .product-image { height: 160px; }
    .product-main .product-grid .product-item .product-info { padding: 12px; }
    .product-main .product-grid .product-item .product-info h3 { font-size: 14px; }
    .related-products .related-grid { grid-template-columns: repeat(2, 1fr); }
    .case-detail .case-images { grid-template-columns: repeat(2, 1fr); }
    .page-content h1 { font-size: 24px; }
    .news-detail h1 { font-size: 24px; }
}

@media (max-width: 480px) {
    header .logo h1 { font-size: 20px; }
    .section { padding: 40px 0; }
    .section-title h2 { font-size: 24px; }
    .banner .banner-list .banner-item { height: 280px; }
    .breadcrumb { padding: 10px 0; }
}

img.lazy { opacity: 0; transition: opacity 0.3s; }
img.lazy.loaded { opacity: 1; }