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tr:nth-child(2n),.product-price-table tr:nth-child(2n){background-color:#f8fafc}.product-spec-table tr:hover,.product-price-table tr:hover{background-color:#f1f5f9}.installation-guide{color:var(--text-dark)}.guide-intro{color:var(--text-light);margin-bottom:25px;font-size:15px}.step-list{flex-direction:column;gap:20px;display:flex}.step-item{background-color:var(--bg-light);border-left:4px solid var(--primary-color);border-radius:8px;align-items:flex-start;gap:20px;padding:20px;transition:transform .2s,box-shadow .2s;display:flex}.step-item:hover{transform:translate(4px);box-shadow:0 4px 12px #00000008}.step-number{background-color:var(--primary-color);color:#fff;border-radius:50%;flex-shrink:0;justify-content:center;align-items:center;width:32px;height:32px;font-size:14px;font-weight:700;display:flex}.step-content h5{color:var(--primary-color);margin-bottom:6px;font-size:16px;font-weight:700}.step-content p{color:#555;margin:0;font-size:14px;line-height:1.5}.distributors-network{flex-direction:column;gap:25px;display:flex}.network-desc{color:var(--text-dark);font-size:15px;line-height:1.6}.region-block{border:1px solid var(--border-color);background-color:#fff;border-radius:8px;padding:20px;box-shadow:0 2px 8px #00000005}.region-block h5{color:var(--primary-color);text-transform:uppercase;margin-bottom:6px;font-size:15px;font-weight:700}.region-info{color:var(--text-light);margin-bottom:12px;font-size:13px}.badge-list{flex-wrap:wrap;gap:8px;display:flex}.badge{color:#4a5568;background-color:#edf2f7;border:1px solid #e2e8f0;border-radius:20px;padding:6px 12px;font-size:13px;font-weight:500;transition:all .2s}.badge:hover{background-color:var(--primary-color);color:#fff;border-color:var(--primary-color);transform:translateY(-1px)}.faq-accordion{flex-direction:column;gap:15px;display:flex}.faq-item{border-bottom:1px solid var(--border-color);padding-bottom:15px}.faq-item:last-child{border-bottom:none;padding-bottom:0}.faq-question{color:var(--text-dark);margin-bottom:8px;font-size:16px;font-weight:700}.faq-answer{color:#555;font-size:14px;line-height:1.6}.faq-answer p{margin:0}.price-cta-block{border:1px solid #ffe3e3;border-left:4px solid var(--secondary-color);color:#2b2b2b;background-color:#fff9db;border-radius:8px;padding:20px}.price-cta-block p{margin-bottom:10px;font-size:15px}.price-cta-block p:last-child{margin-bottom:0}@media (max-width:768px){.tab-header-btn{padding:12px 16px;font-size:14px}.tab-content-panel{padding:20px}.step-item{gap:12px;padding:15px}}.floating-contact-container{z-index:9999;flex-direction:column;gap:16px;display:flex;position:fixed;bottom:25px;right:25px}.floating-btn{cursor:pointer;border-radius:50%;justify-content:center;align-items:center;width:56px;height:56px;text-decoration:none;transition:all .3s cubic-bezier(.175,.885,.32,1.275);display:flex;position:relative;box-shadow:0 4px 16px #00000040;color:#fff!important}.floating-btn:hover{transform:translateY(-5px)scale(1.05)}.btn-icon{z-index:2;justify-content:center;align-items:center;width:100%;height:100%;display:flex}.btn-call-float{background-color:#2ecc71}.btn-zalo-float{background-color:#0068ff}.btn-label{color:#fff;white-space:nowrap;opacity:0;visibility:hidden;pointer-events:none;background-color:#0f172ae6;border-radius:6px;padding:6px 12px;font-size:13px;font-weight:600;transition:all .3s;position:absolute;right:70px;transform:translate(10px);box-shadow:0 2px 10px #00000026}.btn-label:after{content:"";border:5px solid #0000;border-left-color:#0f172ae6;border-right-width:0;position:absolute;top:50%;right:-5px;transform:translateY(-50%)}.floating-btn:hover .btn-label{opacity:1;visibility:visible;transform:translate(0)}.pulse-ring{z-index:1;pointer-events:none;border-radius:50%;width:100%;height:100%;position:absolute;top:0;left:0}.pulse-ring.bg-call{background-color:#2ecc7166;animation:1.8s ease-out infinite pulse-ring-effect}.pulse-ring.bg-zalo{background-color:#0068ff66;animation:1.8s ease-out .9s infinite pulse-ring-effect}@keyframes pulse-ring-effect{0%{opacity:.8;transform:scale(1)}to{opacity:0;transform:scale(1.6)}}@media (max-width:768px){.floating-contact-container{gap:12px;bottom:20px;right:20px}.floating-btn{width:48px;height:48px}.btn-label{display:none}}