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var(--color-shadow-dark);margin:0}.contact-social{height:50vh;display:flex;flex-direction:column;align-items:center;justify-content:start;padding:var(--spacing-2xl);font-size:var(--font-size-3xl)}.social-icons{display:flex;gap:var(--spacing-2xl);margin-bottom:var(--spacing-2xl)}.social-icon{display:flex;flex-direction:column;align-items:center;text-decoration:none;color:var(--color-text-primary);transition:all var(--transition-normal);padding:var(--spacing-md);border-radius:var(--border-radius-lg)}.social-icon:hover{transform:translateY(-5px);color:var(--color-text-primary);background:#ffffff1a}.social-icon svg{margin-bottom:var(--spacing-xs)}.social-icon span{font-size:var(--font-size-base);font-weight:var(--font-weight-semibold)}.instagram:hover{color:var(--color-text-primary);background:#e4405f4d}.xiaohongshu:hover{color:var(--color-text-primary);background:#ff24424d}.contact-email{text-align:center}.contact-email p{font-size:var(--font-size-xl);color:var(--color-text-primary);margin:0;font-weight:var(--font-weight-semibold)}@media(max-width:880px){:root{--header-height: 72px}.header-content{justify-content:space-between;position:relative}.brand-slo{justify-content:left}nav{display:flex;position:absolute;top:100%;left:0;right:0;background:var(--color-bg-primary);-webkit-backdrop-filter:var(--blur-md);backdrop-filter:var(--blur-md);flex-direction:column;gap:0;padding:var(--spacing-md) 0;z-index:100;box-shadow:var(--shadow-md);opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;transition:opacity var(--transition-normal),transform var(--transition-normal),visibility 0s linear var(--transition-normal)}nav a{display:block;padding:var(--spacing-md) var(--spacing-xl);text-align:center;border-bottom:1px solid var(--color-border-light)}nav a:last-child{border-bottom:none}nav a.active{background-color:var(--color-accent-light)}.mobile-menu-toggle{display:block;margin-left:auto}nav.mobile-expanded{opacity:1;visibility:visible;transform:translateY(0);pointer-events:auto;transition:opacity var(--transition-normal),transform var(--transition-normal),visibility 0s linear 0s}.brand{font-size:var(--font-size-xl)}.logo{height:40px}.hero-text{font-size:var(--font-size-xl)}.giant-title{font-size:var(--font-size-6xl);letter-spacing:-1px}.hero-subtitle{font-size:var(--font-size-xl)}.prev-arrow,.next-arrow{width:50px;height:50px;font-size:var(--font-size-4xl)}.prev-arrow{left:var(--spacing-lg)}.next-arrow{right:var(--spacing-lg)}}@media(max-width:480px){:root{--header-height: 62px}.giant-title{font-size:var(--font-size-4xl)}.hero-subtitle{font-size:var(--font-size-base)}.hero-section{min-height:60vh}.logo{height:30px}.contact-title{font-size:var(--font-size-4xl)}.social-icons{gap:var(--spacing-xl);flex-direction:column}.contact-social{height:auto;min-height:50vh;padding:var(--spacing-2xl) var(--spacing-md)}}.firmware-modal{position:fixed;top:0;left:0;width:100%;height:100%;background:#000c;display:flex;align-items:center;justify-content:center;z-index:10000}.firmware-modal .modal-content{background:var(--color-text-primary);border-radius:var(--border-radius-xl);width:80%;max-width:900px;max-height:80vh;overflow:hidden;display:flex;flex-direction:column;box-shadow:var(--shadow-lg)}.firmware-modal .modal-header{background:var(--color-accent);color:var(--color-text-primary);padding:var(--spacing-xl);text-align:center}.firmware-modal .modal-header h2{margin:0;font-size:var(--font-size-2xl);font-weight:var(--font-weight-semibold)}.firmware-modal .modal-body{display:grid;grid-template-columns:1fr 1fr;gap:var(--spacing-2xl);padding:var(--spacing-2xl);flex:1;overflow-y:auto}.firmware-modal .product-selection,.firmware-modal .tutorial-section{display:flex;flex-direction:column}.firmware-modal .product-selection h3,.firmware-modal .tutorial-section h3{margin:0 0 var(--spacing-xl) 0;font-size:var(--font-size-xl);color:var(--color-text-dark);font-weight:var(--font-weight-semibold)}.firmware-modal .product-list{display:flex;flex-direction:column;gap:var(--spacing-md)}.firmware-modal .product-item{display:flex;align-items:center;padding:var(--spacing-md);border:2px solid var(--color-border);border-radius:var(--border-radius-md);cursor:pointer;transition:all var(--transition-fast)}.firmware-modal .product-item:hover{border-color:var(--color-accent);background:#f8f9fa}.firmware-modal .product-item input[type=radio]{margin-right:var(--spacing-md);transform:scale(1.2)}.firmware-modal .product-item label{color:var(--color-text-dark);font-weight:var(--font-weight-medium);cursor:pointer;margin:0}.firmware-modal .tutorial-content{background:#f8f9fa;padding:var(--spacing-xl);border-radius:var(--border-radius-md);border-left:4px solid var(--color-accent)}.firmware-modal .tutorial-content p{margin:0 0 var(--spacing-lg) 0;color:#555;line-height:1.5}.firmware-modal .tutorial-content p:last-child{margin-bottom:0}.firmware-modal .modal-footer{padding:var(--spacing-xl);background:#f8f9fa;border-top:1px solid var(--color-border);text-align:right}.firmware-modal .continue-btn{background:var(--color-accent);color:var(--color-text-primary);border:none;padding:var(--spacing-md) var(--spacing-xl);border-radius:var(--border-radius-md);font-size:var(--font-size-base);font-weight:var(--font-weight-semibold);cursor:pointer;transition:background var(--transition-fast)}.firmware-modal .continue-btn:hover{background:#024d31}@media(max-width:768px){.firmware-modal .modal-body{grid-template-columns:1fr;gap:var(--spacing-xl)}.firmware-modal .modal-content{width:95%;max-height:90vh}}