:root{--primary-color:#4a6cf7;--primary-dark:#3151d7;--secondary-color:#34a853;--accent-color:#fbbc04;--text-dark:#1e293b;--text-light:#64748b;--bg-light:#f8fafc;--white:#ffffff;--shadow-sm:0 4px 6px -1px rgb(0 0 0 / 0.1);--shadow-md:0 10px 15px -3px rgb(0 0 0 / 0.1);--shadow-lg:0 24px 48px -12px rgb(0 0 0 / 0.25);--radius-sm:12px;--radius-md:20px;--radius-lg:28px;--radius-xl:40px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Google Sans','Helvetica Neue',sans-serif;color:var(--text-dark);line-height:1.5;background-color:var(--white);-webkit-font-smoothing:antialiased}.container{max-width:1280px;margin:0 auto;padding:0 24px}section{padding:80px 0}@media (max-width:768px){section{padding:60px 0}}.site-header{position:sticky;top:0;background:rgba(255,255,255,.98);backdrop-filter:blur(8px);border-bottom:1px solid #eef2f6;box-shadow:var(--shadow-sm);z-index:100}.header-container{display:flex;justify-content:space-between;align-items:center;height:72px}.logo a{display:flex;align-items:center;gap:12px;text-decoration:none}.logo-icon{display:flex;align-items:center;justify-content:center;width:40px;height:40px;background:linear-gradient(135deg,#4285f4,#34a853,#fbbc04,#ea4335);color:#fff;font-weight:700;font-size:24px;border-radius:12px;box-shadow:var(--shadow-sm)}.logo-text{font-size:20px;font-weight:600;color:var(--text-dark);letter-spacing:-.02em}.main-nav ul{display:flex;gap:32px;list-style:none}.nav-link{text-decoration:none;color:var(--text-dark);font-weight:500;font-size:16px;transition:color .2s}.nav-link:hover{color:var(--primary-color)}.mobile-menu-toggle{display:none;flex-direction:column;gap:6px;background:0 0;border:none;cursor:pointer;padding:8px}.mobile-menu-toggle span{width:24px;height:2px;background-color:var(--text-dark);transition:.2s;border-radius:2px}@media (max-width:768px){.main-nav{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;border-bottom:1px solid #eef2f6;box-shadow:var(--shadow-md);padding:24px}.main-nav.active{display:block}.main-nav ul{flex-direction:column;gap:20px}.mobile-menu-toggle{display:flex}}.hero{background:linear-gradient(145deg,#f9fbfd 0,#fff 100%);overflow:hidden}.hero .container{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}@media (max-width:992px){.hero .container{grid-template-columns:1fr;text-align:center}}.hero-title{font-size:clamp(36px, 5vw, 52px);font-weight:700;line-height:1.2;margin-bottom:24px;background:linear-gradient(135deg,var(--primary-color),#1e3a8a);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero-subtitle{font-size:18px;color:var(--text-light);margin-bottom:32px;max-width:540px}@media (max-width:992px){.hero-subtitle{margin-left:auto;margin-right:auto}}.hero-image{position:relative;padding:20px}.hero-card{background:#fff;border-radius:var(--radius-lg);padding:24px;box-shadow:var(--shadow-lg);max-width:400px;margin:0 auto}.hero-chat{display:flex;flex-direction:column;gap:16px}.chat-message{display:flex;align-items:flex-start;gap:12px}.chat-avatar{width:40px;height:40px;background:linear-gradient(135deg,#4285f4,#34a853);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#fff;font-weight:600}.chat-bubble{background:#f1f3f4;border-radius:18px;padding:12px 16px;max-width:80%;font-size:14px}.chat-bubble.self{background:var(--primary-color);color:#fff;margin-left:auto}.filter-section{background:var(--bg-light)}.section-header{text-align:center;max-width:600px;margin:0 auto 48px}.section-title{font-size:clamp(28px, 4vw, 36px);font-weight:700;margin-bottom:16px;color:var(--text-dark)}.section-subtitle{font-size:18px;color:var(--text-light)}.category-filter{display:flex;flex-wrap:wrap;justify-content:center;gap:12px;margin-bottom:48px}.filter-btn{padding:12px 24px;border:1px solid #e2e8f0;background:#fff;border-radius:var(--radius-xl);font-weight:500;font-size:16px;color:var(--text-dark);cursor:pointer;transition:all .2s;box-shadow:var(--shadow-sm)}.filter-btn.active,.filter-btn:hover{background:var(--primary-color);border-color:var(--primary-color);color:#fff;box-shadow:var(--shadow-md)}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:32px;margin-top:32px}.product-card{background:#fff;border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);border:1px solid #eef2f6;transition:all .3s ease}.product-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.product-category-badge{display:inline-block;padding:6px 12px;background:rgba(74,108,247,.1);color:var(--primary-color);border-radius:40px;font-size:12px;font-weight:600;margin-bottom:16px}.product-title{font-size:22px;font-weight:700;margin-bottom:12px}.product-desc{color:var(--text-light);font-size:14px;margin-bottom:20px;min-height:60px}.product-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px}.stock{color:var(--secondary-color);font-size:14px;font-weight:600;background:rgba(52,168,83,.1);padding:4px 12px;border-radius:40px}.price{font-size:24px;font-weight:700;color:var(--text-dark)}.price small{font-size:14px;font-weight:400;color:var(--text-light)}.buy-btn{display:block;text-align:center;padding:14px;background:var(--primary-color);color:#fff;text-decoration:none;border-radius:var(--radius-xl);font-weight:600;transition:background .2s}.buy-btn:hover{background:var(--primary-dark)}.product-table{background:#fff;border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}.product-table 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24px;font-size:32px;color:var(--primary-color)}.feature-title{font-size:22px;font-weight:700;margin-bottom:16px}.feature-desc{color:var(--text-light)}.faq-section{background:var(--bg-light)}.faq-grid{max-width:800px;margin:0 auto;display:flex;flex-direction:column;gap:16px}.faq-item{background:#fff;border-radius:var(--radius-md);overflow:hidden;box-shadow:var(--shadow-sm);border:1px solid #eef2f6}.faq-question{padding:20px 24px;font-weight:600;font-size:18px;cursor:pointer;display:flex;justify-content:space-between;align-items:center}.faq-question::after{content:'\002B';font-size:24px;font-weight:300;transition:transform .2s}.faq-item.active .faq-question::after{content:'\2212'}.faq-answer{padding:0 24px;max-height:0;overflow:hidden;transition:max-height .3s ease-out;color:var(--text-light);border-top:0 solid #eef2f6}.faq-item.active .faq-answer{padding:24px;max-height:300px;border-top-width:1px}.site-footer{background:#202124;color:#9aa0a6;padding:20px 0}.footer-content{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:24px}.copyright{font-size:14px}.footer-links a{color:#9aa0a6;text-decoration:none;margin-left:24px;font-size:14px}.footer-links a:hover{color:#fff}@media (max-width:768px){.footer-content{flex-direction:column;text-align:center}.footer-links a{margin:0 12px}}:root{--primary-color:#4a6cf7;--primary-dark:#3151d7;--secondary-color:#34a853;--accent-color:#fbbc04;--text-dark:#1e293b;--text-light:#64748b;--bg-light:#f8fafc;--white:#ffffff;--shadow-sm:0 4px 6px -1px rgb(0 0 0 / 0.1);--shadow-md:0 10px 15px -3px rgb(0 0 0 / 0.1);--shadow-lg:0 24px 48px -12px rgb(0 0 0 / 0.25);--radius-sm:12px;--radius-md:20px;--radius-lg:28px;--radius-xl:40px;--price-red:#ef4444;--success-green:#22c55e;--border-color:#eef2f6;--bs-card-spacer-y:30px;--bs-card-spacer-x:30px;--bs-card-title-spacer-y:0.5rem;--bs-card-title-color:#1e293b;--bs-card-subtitle-color:#64748b;--bs-card-border-width:0px;--bs-card-border-color:#eef2f6;--bs-card-border-radius:28px;--bs-card-box-shadow:0 4px 6px -1px rgb(0 0 0 / 0.1);--bs-card-inner-border-radius:20px;--bs-card-cap-padding-y:15px;--bs-card-cap-padding-x:30px;--bs-card-cap-bg:rgba(74, 108, 247, 0.03);--bs-card-bg:#ffffff;--bs-card-img-overlay-padding:1rem;--bs-card-group-margin:12px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,'Google Sans','Helvetica Neue',sans-serif;color:var(--text-dark);line-height:1.5;background-color:var(--bg-light);-webkit-font-smoothing:antialiased}.container{max-width:1280px;margin:0 auto;padding:0 24px}.breadcrumb{margin:30px 0;font-size:.9rem;color:var(--text-light)}.breadcrumb a{color:var(--primary-color);text-decoration:none;transition:all .2s}.breadcrumb a:hover{color:var(--primary-dark);text-decoration:underline}.breadcrumb span{margin:0 8px;color:var(--text-light)}.product-d-detail{background:var(--white);border-radius:var(--radius-lg);padding:var(--bs-card-spacer-y) var(--bs-card-spacer-x);box-shadow:var(--shadow-sm);border:1px solid var(--border-color);margin-bottom:60px;display:grid;grid-template-columns:1fr 1fr;gap:40px}.product-d-info,.purchase-options{border:none}.product-d-title{font-size:1.8rem;font-weight:700;margin-bottom:15px;color:var(--text-dark)}.product-d-price{font-size:2.2rem;font-weight:700;color:var(--price-red);margin-bottom:25px}.product-d-specs{margin-bottom:25px}.spec-row{display:flex;padding:12px 0;border-bottom:1px solid var(--border-color)}.spec-row:last-child{border-bottom:none}.spec-label{flex:0 0 140px;color:var(--text-light);font-weight:500;display:flex;align-items:center;gap:8px}.spec-value{flex:1;font-weight:600;color:var(--text-dark)}.spec-value.highlight{color:var(--success-green)}.option-title{font-size:1.3rem;font-weight:600;margin-bottom:25px;color:var(--text-dark)}.form-group{margin-bottom:25px}.form-label{display:block;margin-bottom:10px;color:var(--text-light);font-weight:500;font-size:.95rem}.required{color:var(--price-red)}.email-input{width:100%;padding:12px 15px;border:1px solid var(--border-color);border-radius:var(--radius-xl);font-size:1rem;transition:all .2s}.email-input:focus{outline:0;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(74,108,247,.1)}.email-hint{margin-top:8px;font-size:.85rem;color:var(--text-light);display:flex;align-items:center;gap:5px}.quantity-selector{display:flex;align-items:center;background:var(--white);border-radius:var(--radius-xl);border:1px solid var(--border-color);overflow:hidden;transition:all .2s;max-width:150px}.quantity-selector:focus-within{border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(74,108,247,.1)}.quantity-btn{width:40px;height:40px;line-height:40px;border:none;background:rgba(74,108,247,.1);color:var(--text-dark);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:all .2s}.quantity-btn:hover{background:rgba(74,108,247,.2)}.quantity-btn:disabled{opacity:.5;cursor:not-allowed}.quantity-input{flex:1;height:40px;text-align:center;border:none;background:0 0;font-size:1rem;font-weight:600;color:var(--text-dark);outline:0;min-width:60px}.quantity-input::-webkit-inner-spin-button,.quantity-input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.quantity-input[type=number]{-moz-appearance:textfield}.payment-section{margin-bottom:20px}.payment-label{font-size:.95rem;color:var(--text-dark);margin-bottom:8px;font-weight:600}.payment-methods{display:flex;gap:8px;flex-wrap:wrap}.payment-method{flex:1;min-width:120px;padding:12px 8px;border:1px solid var(--border-color);border-radius:var(--radius-md);background:var(--white);cursor:pointer;transition:all .2s;text-align:center;font-size:.85rem;font-weight:600}.payment-method.selected,.payment-method:hover{border-color:var(--primary-color);background:rgba(74,108,247,.1)}.payment-method input[type=radio]{display:none}.payment-icon{margin-bottom:5px}.payment-icon>img{border-radius:10px}.total-price{background:linear-gradient(135deg,rgba(251,188,4,.1),rgba(251,188,4,.2));padding:15px;border-radius:var(--radius-md);margin-bottom:25px;display:flex;justify-content:space-between;align-items:center;border:1px solid rgba(251,188,4,.3)}.total-label{font-size:1rem;color:#92400e;font-weight:500}.total-amount{font-size:1.8rem;font-weight:700;color:#92400e}.action-buttons{display:flex;gap:15px}.btn{padding:15px 25px;border:none;border-radius:var(--radius-xl);font-size:1rem;cursor:pointer;transition:all .2s;font-weight:600;flex:1;text-align:center;text-decoration:none;display:inline-block}.btn-primary{background:linear-gradient(135deg,var(--primary-color),var(--primary-dark));color:#fff}.btn-primary:hover{box-shadow:var(--shadow-md)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-secondary{background:linear-gradient(135deg,#f5f7fa,#e9ecef);color:var(--text-dark)}.btn-secondary:hover{background:linear-gradient(135deg,#e9ecef,#dee2e6)}.product-d-description{grid-column:1/-1;margin-top:20px}.description-d-title{font-size:1.5rem;margin-bottom:25px;color:var(--text-dark);display:flex;align-items:center;gap:10px}.description-d-content{line-height:1.8;color:var(--text-light)}.description-d-content p{margin-bottom:20px;font-size:1.05rem;line-height:1.8}.description-d-content ol,.description-d-content ul{margin:20px 0;padding-left:25px}.description-d-content li{margin-bottom:10px;line-height:1.6}.description-d-content h3{font-size:1.3rem;color:var(--text-dark);margin:25px 0 15px;font-weight:600;display:flex;align-items:center;gap:10px}.description-d-content strong{color:var(--text-dark)}.feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:15px;margin:20px 0}.feature-item{display:flex;align-items:center;gap:10px;padding:15px;background:rgba(74,108,247,.05);border-radius:var(--radius-md)}.feature-icon{color:var(--success-green);font-size:1.2rem}.security-notice{background:linear-gradient(135deg,rgba(52,168,83,.1),rgba(52,168,83,.2));padding:20px;border-radius:var(--radius-md);margin-top:30px;display:flex;align-items:center;gap:15px;border:1px solid rgba(52,168,83,.3)}.security-icon{font-size:1.5rem;color:var(--secondary-color)}.security-text{flex:1;color:var(--secondary-color);font-size:.95rem;line-height:1.6}.related-products{margin-bottom:80px}.section-title{font-size:1.8rem;font-weight:700;margin-bottom:15px;text-align:center;color:var(--text-dark)}.section-subtitle{font-size:1.1rem;color:var(--text-light);text-align:center;margin-bottom:30px;max-width:600px;margin-left:auto;margin-right:auto}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:25px}.ks-product-card{background:var(--white);border-radius:var(--radius-lg);padding:var(--bs-card-spacer-y) var(--bs-card-spacer-x);box-shadow:var(--shadow-sm);transition:all .3s;border:1px solid var(--border-color);display:flex;flex-direction:column}.ks-product-card:hover{box-shadow:var(--shadow-lg);border-color:var(--primary-color)}.ks-product-card-title{font-size:1.2rem;font-weight:600;margin-bottom:15px;color:var(--text-dark);flex-grow:0;display:flex;align-items:center;gap:8px}.ks-product-card-description{color:var(--text-light);margin-bottom:15px;font-size:.95rem;line-height:1.6;flex-grow:1}.ks-product-card-price{color:var(--price-red);font-weight:600;font-size:1.3rem;margin-bottom:15px;flex-grow:0}.ks-product-card-action{flex-grow:0}.ks-product-card-action .btn-primary{display:inline-block;width:100%;text-decoration:none}.modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.7);z-index:2000;opacity:0;transition:opacity .3s ease}.modal-overlay.active{display:flex;align-items:center;justify-content:center;opacity:1}.modal-content{background:var(--white);border-radius:var(--radius-lg);max-width:900px;width:90%;max-height:90vh;overflow-y:auto;transform:scale(.9);transition:transform .3s ease;box-shadow:var(--shadow-lg)}.modal-overlay.active .modal-content{transform:scale(1)}.modal-header{padding:25px 30px;border-bottom:1px solid var(--border-color);display:flex;align-items:center;justify-content:space-between}.modal-title{font-weight:600;color:var(--text-dark);gap:10px;font-size:24px;display:flex;align-items:center}.close-btn{font-size:24px;width:40px;height:40px;border:none;background:var(--bg-light);border-radius:50%;cursor:pointer;justify-content:center;color:var(--text-light);transition:all .3s;display:flex;align-items:center}.close-btn:hover{background:var(--border-color);color:var(--text-dark);transform:rotate(90deg)}.modal-body{padding:30px;display:grid;grid-template-columns:repeat(2,1fr);gap:30px}.order-summary{background:linear-gradient(135deg,var(--bg-light),#e9ecef);padding:25px;border-radius:var(--radius-md)}.summary-title{font-size:18px;font-weight:600;color:var(--text-dark);margin-bottom:20px;gap:8px;display:flex;align-items:center}.summary-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid rgba(0,0,0,.08)}.summary-row-clear-bt{border-bottom:none}.summary-row:last-child{border-bottom:none;padding-top:15px;margin-top:5px;border-top:2px solid rgba(0,0,0,.1)}.summary-label{width:120px;color:var(--text-light);font-size:14px}.summary-value{font-weight:600;color:var(--text-dark)}.summary-value.total{font-size:24px;color:var(--price-red)}.payment-title{font-size:16px;font-weight:600;color:var(--text-dark);margin-bottom:15px;display:flex;align-items:center;gap:8px}.selected-payment{background:rgba(34,197,94,.1);border:2px solid var(--success-green);padding:15px;border-radius:var(--radius-md);display:flex;align-items:center;gap:15px;margin-bottom:20px}.selected-payment .payment-icon{font-size:2rem;color:var(--success-green)}.qr-section{text-align:center;padding:20px;margin-bottom:20px}.qr-code{width:200px;height:200px;margin:0 auto 15px;background:var(--white);padding:10px;border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;font-size:14px;color:var(--text-light);border:1px solid var(--border-color)}.address-section{background:var(--white);border:2px solid var(--border-color);border-radius:var(--radius-md);padding:15px;margin-bottom:15px;position:relative}.address-label{font-size:13px;color:var(--text-light);margin-bottom:8px;display:flex;align-items:center;gap:5px}.address-value{font-size:14px;word-break:break-all;color:var(--text-dark);line-height:1.4;padding-right:40px;width:85%}.copy-btn{position:absolute;right:10px;top:50%;transform:translateY(-50%);background:var(--success-green);color:var(--white);border:none;padding:8px 15px;border-radius:var(--radius-xl);font-size:13px;cursor:pointer;transition:all .3s;display:flex;align-items:center;gap:5px}.copy-btn:hover{background:#05a050}.copy-btn.copied{background:#4caf50}.btn-confirm{background:linear-gradient(135deg,var(--success-green),#05a050);color:var(--white);padding:15px 25px;border:none;border-radius:var(--radius-xl);font-size:1rem;cursor:pointer;transition:all .2s;font-weight:600;width:100%;display:flex;align-items:center;justify-content:center;gap:8px}.btn-confirm:hover:not(:disabled){transform:translateY(-2px);box-shadow:0 5px 15px rgba(34,197,94,.4)}.btn-confirm:disabled{opacity:.6;cursor:not-allowed}.countdown-section{background:linear-gradient(135deg,rgba(239,68,68,.1),rgba(239,68,68,.2));padding:20px;border-radius:var(--radius-md);margin-bottom:25px;text-align:center;border:1px solid rgba(239,68,68,.3)}.countdown-title{font-size:14px;color:#991b1b;margin-bottom:10px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:5px}.countdown-timer{font-size:36px;font-weight:700;color:#dc2626;font-family:Courier New,monospace;letter-spacing:2px}.countdown-timer.warning{animation:blink 1s ease-in-out infinite}@keyframes blink{0%,50%{opacity:1}51%,to{opacity:.3}}.countdown-hint{font-size:12px;color:#7f1d1d;margin-top:8px}.toast-container{position:fixed;top:20px;right:20px;z-index:9999;pointer-events:none}.toast{background:var(--white);color:var(--white);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);padding:16px 20px;margin-bottom:10px;min-width:300px;max-width:400px;display:flex;align-items:center;transform:translateX(100%);opacity:0;transition:all .3s cubic-bezier(.4, 0, .2, 1);pointer-events:auto;position:relative}.toast.show{transform:translateX(0);opacity:1}.toast.success{background:var(--success-green)}.toast.error{background:var(--price-red)}.toast.warning{border-left-color:#f59e0b;background:linear-gradient(135deg,#fffbeb,#fef3c7)}.toast.info{border-left-color:var(--primary-color);background:linear-gradient(135deg,#eff6ff,#dbeafe)}.toast.info .toast-icon{color:var(--primary-color)}.toast-icon{margin-right:12px;flex-shrink:0}.toast-content{flex:1}.toast-title{font-weight:600;font-size:14px;margin-bottom:2px;color:#374151}.toast-message{font-size:13px;line-height:1.4}.toast-close{position:absolute;top:8px;right:8px;background:0 0;border:none;font-size:18px;color:var(--white);cursor:pointer;padding:4px;line-height:1;opacity:.7;transition:opacity .2s}.toast-close:hover{opacity:1}.toast-progress{position:absolute;bottom:0;left:0;height:3px;background:rgba(0,0,0,.1);border-radius:0 0 8px 8px;transform-origin:left;animation:progress linear}.toast.success .toast-progress{background:var(--success-green)}.toast.error .toast-progress{background:var(--price-red)}.toast.warning .toast-progress{background:#f59e0b}.toast.info .toast-progress{background:var(--primary-color)}@keyframes progress{0%{transform:scaleX(1)}to{transform:scaleX(0)}}@media (max-width:1024px){.product-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:768px){.breadcrumb{margin:20px 0}.product-d-detail{grid-template-columns:1fr;gap:20px}.feature-list{grid-template-columns:1fr}.action-buttons{flex-direction:column}.payment-methods{display:grid;grid-template-columns:repeat(2,1fr)}.payment-method{min-width:auto}.modal-body{grid-template-columns:1fr;gap:20px}.product-grid{grid-template-columns:1fr}}@media (max-width:480px){.product-d-title{font-size:1.5rem}.product-d-price{font-size:1.8rem}.spec-label{flex:0 0 120px;font-size:.9rem}.spec-value{font-size:.9rem}.description-d-title{font-size:1.3rem}.modal-content{width:95%;max-height:95vh;margin:10px}.modal-header{padding:20px}.modal-title{font-size:20px}.modal-body{padding:20px}.address-value{font-size:12px}}