*{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;line-height:1.6;color:#1e293b;background:#fff}img{max-width:100%;height:auto}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.site-header{background:#fff;box-shadow:0 4px 20px rgba(0,0,0,.02);position:sticky;top:0;z-index:100;backdrop-filter:blur(8px);background:rgba(255,255,255,.85)}.header-flex{display:flex;justify-content:space-between;align-items:center;height:70px}.logo a{display:flex;align-items:center;gap:8px;text-decoration:none;font-weight:700;font-size:1.5rem;letter-spacing:-.5px}.logo-icon{font-size:2rem}.logo-text{color:#0f172a}.logo-text span{color:#06c}.main-nav ul{display:flex;gap:32px;list-style:none}.main-nav a{text-decoration:none;font-weight:500;color:#334155;font-size:1rem;transition:color .2s}.main-nav a:hover{color:#06c}.main-nav .highlight{background:#06c;color:#fff;padding:8px 20px;border-radius:40px;font-weight:600}.main-nav .highlight:hover{background:#004999;color:#fff}.hamburger{display:none;flex-direction:column;gap:6px;background:0 0;border:none;cursor:pointer;padding:8px}.hamburger span{width:26px;height:2px;background:#1e293b;transition:.3s}.hero{background:linear-gradient(145deg,#f8fafc 0,#fff 100%);padding:60px 0;border-bottom:1px solid #eef2f6}.hero-content{max-width:700px;margin:0 auto;text-align:center}.hero h1{font-size:2.6rem;font-weight:800;line-height:1.2;letter-spacing:-1px;background:linear-gradient(135deg,#06c,#4f9eff);-webkit-background-clip:text;-webkit-text-fill-color:transparent;margin-bottom:16px}.hero p{font-size:1.25rem;color:#475569;max-width:600px;margin:0 auto}.filter-section{padding:40px 0 20px}.filter-title{font-size:1.2rem;font-weight:600;margin-bottom:16px;color:#0f172a}.filter-buttons{display:flex;flex-wrap:wrap;gap:12px}.filter-btn{padding:10px 22px;border:1px solid #e2e8f0;border-radius:40px;background:#fff;font-size:.95rem;font-weight:500;color:#334155;cursor:pointer;transition:all .2s ease}.filter-btn.active,.filter-btn:hover{background:#06c;border-color:#06c;color:#fff}.product-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:24px;margin:40px 0}.product-card{background:#fff;border-radius:24px;padding:24px;box-shadow:0 10px 25px -5px rgba(0,0,0,.05),0 8px 10px -6px rgba(0,0,0,.02);border:1px solid #f1f5f9;transition:transform .2s,box-shadow .2s;display:flex;flex-direction:column}.product-card:hover{box-shadow:0 20px 35px -10px rgba(0,102,204,.15)}.product-category-badge{display:inline-block;background:#eef2ff;color:#06c;font-size:.7rem;font-weight:600;padding:4px 10px;border-radius:40px;margin-bottom:14px;align-self:flex-start}.product-card h3{font-size:1.35rem;font-weight:700;margin-bottom:8px;color:#0f172a}.product-desc{color:#64748b;font-size:.9rem;margin-bottom:16px;line-height:1.5;flex:1}.product-meta{display:flex;justify-content:space-between;align-items:center;margin-bottom:20px;font-size:.95rem}.stock{color:#10b981;font-weight:600;display:flex;align-items:center;gap:4px}.stock:before{content:"✓";font-weight:700}.price{font-size:1.6rem;font-weight:800;color:#0f172a}.price small{font-size:1.2rem;font-weight:700;color:#64748b}.btn-buy{display:block;text-align:center;background:#06c;color:#fff;padding:14px 0;border-radius:60px;font-weight:600;text-decoration:none;transition:background .2s;border:none;margin-top:8px}.btn-buy:hover{background:#004999}.features{padding:70px 0;background:#f8fafc}.features h2{font-size:2rem;font-weight:800;text-align:center;margin-bottom:50px;color:#0f172a}.features-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:30px}.feature-item{text-align:center;background:#fff;padding:30px 20px;border-radius:32px;box-shadow:0 10px 25px -5px rgba(0,0,0,.02)}.feature-icon{font-size:2.8rem;margin-bottom:16px}.feature-item h3{font-size:1.25rem;margin-bottom:10px;color:#0f172a}.feature-item p{color:#475569;font-size:.95rem}.faq-section{padding:70px 0;background:#fff}.faq-section h2{font-size:2rem;font-weight:800;text-align:center;margin-bottom:50px;color:#0f172a}.faq-grid{max-width:800px;margin:0 auto}.faq-item{border-bottom:1px solid #e2e8f0}.faq-question{width:100%;text-align:left;padding:22px 0;background:0 0;border:none;font-size:1.15rem;font-weight:600;color:#0f172a;cursor:pointer;display:flex;justify-content:space-between;align-items:center}.faq-question .icon{font-size:1.5rem;color:#06c;transition:transform .2s}.faq-item.active .icon{transform:rotate(45deg)}.faq-answer{padding:0 0 22px 0;color:#475569;line-height:1.7;display:none}.faq-item.active .faq-answer{display:block}.site-footer{padding:30px 0;text-align:center;color:#64748b;border-top:1px solid #eef2f6;font-size:.9rem}@media (max-width:768px){.hamburger{display:flex}.main-nav{position:fixed;top:70px;left:0;width:100%;background:#fff;padding:20px;box-shadow:0 10px 20px rgba(0,0,0,.05);transform:translateY(-150%);opacity:0;transition:.3s;pointer-events:none;border-top:1px solid #eef2f6}.main-nav.active{transform:translateY(0);opacity:1;pointer-events:auto}.main-nav ul{flex-direction:column;gap:16px;align-items:center}.hero h1{font-size:2rem}.features-grid{grid-template-columns:repeat(2,1fr);gap:16px}.product-grid{grid-template-columns:1fr}}@media (max-width:480px){.filter-buttons{flex-wrap:nowrap;overflow-x:auto;padding-bottom:10px;-webkit-overflow-scrolling:touch}.filter-btn{flex-shrink:0}.features-grid{grid-template-columns:1fr}}:root{--primary-blue:#0066cc;--hover-blue:#004999;--light-blue:#e6f0ff;--bg-color:#ffffff;--card-bg:#ffffff;--text-primary:#1e293b;--text-secondary:#64748b;--border-color:#e2e8f0;--price-red:#dc2626;--success-green:#10b981;--transition:all 0.3s ease;--card-radius:24px;--btn-radius:60px;--shadow:0 10px 25px -5px rgba(0, 0, 0, 0.05),0 8px 10px -6px rgba(0, 0, 0, 0.02);--shadow-hover:0 20px 35px -10px rgba(0, 102, 204, 0.15);--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:1px;--bs-card-border-color:#f1f5f9;--bs-card-border-radius:24px;--bs-card-box-shadow:0 10px 25px -5px rgba(0, 0, 0, 0.05),0 8px 10px -6px rgba(0, 0, 0, 0.02);--bs-card-inner-border-radius:24px;--bs-card-cap-padding-y:15px;--bs-card-cap-padding-x:30px;--bs-card-cap-bg:rgba(100, 116, 139, 0.03);--bs-card-bg:#ffffff;--bs-card-img-overlay-padding:1rem;--bs-card-group-margin:12px}.breadcrumb{margin:30px 0;font-size:.95rem;color:var(--text-secondary)}.breadcrumb a{color:var(--primary-blue);text-decoration:none;transition:var(--transition)}.breadcrumb a:hover{color:var(--hover-blue);text-decoration:underline}.breadcrumb span{margin:0 8px;color:var(--text-secondary)}.product-d-detail{background:var(--card-bg);border-radius:var(--card-radius);padding:var(--bs-card-spacer-y) var(--bs-card-spacer-x);box-shadow:var(--shadow);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:2.2rem;font-weight:800;line-height:1.2;letter-spacing:-1px;margin-bottom:20px;color:var(--text-primary);background:linear-gradient(135deg,var(--primary-blue),#4f9eff);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.product-d-price{font-size:2.5rem;font-weight:800;color:var(--text-primary);margin-bottom:30px}.product-d-price:before{content:'$';font-size:1.5rem;font-weight:500;color:var(--text-secondary);margin-right:4px}.product-d-specs{margin-bottom:30px;background:var(--light-blue);padding:20px;border-radius:var(--card-radius)}.spec-row{display:flex;padding:12px 0;border-bottom:1px solid rgba(0,102,204,.1)}.spec-row:last-child{border-bottom:none}.spec-label{flex:0 0 140px;color:var(--text-secondary);font-weight:500;display:flex;align-items:center;gap:8px}.spec-label i{color:var(--primary-blue);width:20px}.spec-value{flex:1;font-weight:600;color:var(--text-primary)}.spec-value.highlight{color:var(--success-green)}.option-title{font-size:1.5rem;font-weight:700;margin-bottom:25px;color:var(--text-primary)}.form-group{margin-bottom:25px}.form-label{display:block;margin-bottom:10px;color:var(--text-secondary);font-weight:500;font-size:.95rem}.required{color:var(--price-red)}.email-input{width:100%;padding:14px 18px;border:1px solid var(--border-color);border-radius:var(--btn-radius);font-size:1rem;transition:var(--transition)}.email-input:focus{outline:0;border-color:var(--primary-blue);box-shadow:0 0 0 4px rgba(0,102,204,.1)}.email-hint{margin-top:8px;font-size:.85rem;color:var(--text-secondary);display:flex;align-items:center;gap:5px}.email-hint i{color:var(--primary-blue)}.quantity-selector{display:flex;align-items:center;background:#fff;border-radius:var(--btn-radius);border:1px solid var(--border-color);overflow:hidden;transition:var(--transition);max-width:180px}.quantity-selector:focus-within{border-color:var(--primary-blue);box-shadow:0 0 0 4px rgba(0,102,204,.1)}.quantity-btn{width:48px;height:48px;line-height:48px;border:none;background:var(--light-blue);color:var(--text-primary);cursor:pointer;display:flex;align-items:center;justify-content:center;font-size:1rem;transition:var(--transition)}.quantity-btn:hover{background:var(--primary-blue);color:#fff}.quantity-btn:disabled{opacity:.5;cursor:not-allowed}.quantity-input{flex:1;height:48px;text-align:center;border:none;background:0 0;font-size:1rem;font-weight:600;color:var(--text-primary);outline:0;min-width:70px}.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:25px}.payment-label{font-size:.95rem;color:var(--text-primary);margin-bottom:12px;font-weight:600}.payment-methods{display:flex;gap:10px;flex-wrap:wrap}.payment-method{flex:1;padding:16px 8px;border:2px solid var(--border-color);border-radius:var(--card-radius);background:#fff;cursor:pointer;transition:var(--transition);text-align:center;font-size:.85rem;font-weight:600}.payment-method.selected,.payment-method:hover{border-color:var(--primary-blue);background:var(--light-blue)}.payment-method input[type=radio]{display:none}.payment-icon{margin-bottom:8px}.payment-icon img{border-radius:12px;width:48px;height:48px;object-fit:contain}.total-price{background:linear-gradient(135deg,var(--light-blue),#d9e9ff);padding:20px;border-radius:var(--card-radius);margin-bottom:25px;display:flex;justify-content:space-between;align-items:center}.total-label{font-size:1rem;color:var(--primary-blue);font-weight:600;display:flex;align-items:center;gap:6px}.total-label i{color:var(--primary-blue)}.total-amount{font-size:2rem;font-weight:800;color:var(--text-primary)}.total-amount:before{content:'$';font-size:1.2rem;font-weight:500;color:var(--text-secondary);margin-right:2px}.action-buttons{display:flex;gap:15px}.btn{padding:16px 28px;border:none;border-radius:var(--btn-radius);font-size:1.1rem;cursor:pointer;transition:var(--transition);font-weight:600;flex:1;text-align:center;text-decoration:none;display:inline-block}.btn-primary{background:var(--primary-blue);color:#fff}.btn-primary:hover{background:var(--hover-blue);box-shadow:var(--shadow-hover)}.btn-primary:disabled{opacity:.6;cursor:not-allowed;transform:none}.btn-secondary{background:linear-gradient(135deg,#f8fafc,#f1f5f9);color:var(--text-primary)}.btn-secondary:hover{background:linear-gradient(135deg,#f1f5f9,#e2e8f0)}.product-d-description{grid-column:1/-1;margin-top:30px}.description-d-title{font-size:1.8rem;font-weight:700;margin-bottom:25px;color:var(--text-primary);display:flex;align-items:center;gap:10px}.description-d-title i{color:var(--primary-blue)}.description-d-content{line-height:1.8;color:var(--text-secondary)}.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:1.4rem;color:var(--text-primary);margin:30px 0 15px;font-weight:600;display:flex;align-items:center;gap:10px}.description-d-content h3 i{color:var(--primary-blue)}.description-d-content strong{color:var(--text-primary)}.security-notice{background:linear-gradient(135deg,var(--light-blue),#d9e9ff);padding:20px;border-radius:var(--card-radius);margin-top:30px;display:flex;align-items:center;gap:15px}.security-icon{font-size:1.8rem;color:var(--primary-blue)}.security-text{flex:1;color:var(--text-primary);font-size:.95rem;line-height:1.6}.related-products{margin-bottom:80px}.section-title{font-size:2.2rem;font-weight:800;margin-bottom:15px;text-align:center;color:var(--text-primary);letter-spacing:-1px}.section-subtitle{font-size:1.1rem;color:var(--text-secondary);text-align:center;margin-bottom:40px;max-width:600px;margin-left:auto;margin-right:auto}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:30px}.ks-product-card{background:var(--card-bg);border-radius:var(--card-radius);padding:var(--bs-card-spacer-y) var(--bs-card-spacer-x);box-shadow:var(--shadow);transition:var(--transition);border:var(--bs-card-border-width) solid var(--bs-card-border-color);display:flex;flex-direction:column}.ks-product-card:hover{box-shadow:var(--shadow-hover)}.ks-product-card-title{font-size:1.3rem;font-weight:700;margin-bottom:15px;color:var(--text-primary);flex-grow:0;display:flex;align-items:center;gap:8px}.ks-product-card-description{color:var(--text-secondary);margin-bottom:15px;font-size:.95rem;line-height:1.6;flex-grow:1}.ks-product-card-price{color:var(--text-primary);font-weight:800;font-size:1.5rem;margin-bottom:15px;flex-grow:0}.ks-product-card-price:before{content:'$';font-size:1rem;font-weight:500;color:var(--text-secondary);margin-right:2px}.ks-product-card-action{flex-grow:0}.ks-product-card-action .btn-primary{display:block;padding:12px 20px;font-size:1rem}.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:#fff;border-radius:32px;max-width:900px;width:90%;max-height:90vh;overflow-y:auto;transform:scale(.9);transition:transform .3s ease;box-shadow:0 20px 60px rgba(0,0,0,.3)}.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:700;color:var(--text-primary);gap:10px;font-size:24px;display:flex;align-items:center}.modal-title i{color:var(--primary-blue)}.close-btn{font-size:24px;width:40px;height:40px;border:none;background:var(--light-blue);border-radius:50%;cursor:pointer;justify-content:center;color:var(--text-secondary);transition:all .3s;display:flex;align-items:center}.close-btn:hover{background:var(--primary-blue);color:#fff;transform:rotate(90deg)}.modal-body{padding:30px;display:grid;grid-template-columns:repeat(2,1fr);gap:30px}.order-summary{background:var(--light-blue);padding:25px;border-radius:24px}.summary-title{font-size:18px;font-weight:600;color:var(--text-primary);margin-bottom:20px;gap:8px;display:flex;align-items:center}.summary-title i{color:var(--primary-blue)}.summary-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid rgba(0,102,204,.1)}.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(0,102,204,.2)}.summary-label{width:120px;color:var(--text-secondary);font-size:14px}.summary-value{font-weight:600;color:var(--text-primary)}.summary-value.total{font-size:24px;color:var(--text-primary)}.payment-title{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:15px;display:flex;align-items:center;gap:8px}.selected-payment{background:#f0fdf4;border:2px solid var(--success-green);padding:15px;border-radius:16px;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:#fff;padding:10px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:14px;color:#999;border:1px solid var(--border-color)}.address-section{background:#fff;border:2px solid var(--border-color);border-radius:16px;padding:15px;margin-bottom:15px;position:relative}.address-label{font-size:13px;color:var(--text-secondary);margin-bottom:8px;display:flex;align-items:center;gap:5px}.address-label i{color:var(--primary-blue)}.address-value{font-size:14px;word-break:break-all;color:var(--text-primary);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:#fff;border:none;padding:8px 15px;border-radius:40px;font-size:13px;cursor:pointer;transition:all .3s;display:flex;align-items:center;gap:5px}.copy-btn:hover{background:#059669}.copy-btn.copied{background:#059669}.btn-confirm{background:var(--primary-blue);color:#fff;padding:15px 25px;border:none;border-radius:60px;font-size:1rem;cursor:pointer;transition:var(--transition);font-weight:600;width:100%;display:flex;align-items:center;justify-content:center;gap:8px}.btn-confirm:hover:not(:disabled){background:var(--hover-blue);transform:translateY(-2px);box-shadow:var(--shadow-hover)}.btn-confirm:disabled{opacity:.6;cursor:not-allowed}.countdown-section{background:linear-gradient(135deg,#fee2e2,#fecaca);padding:20px;border-radius:16px;margin-bottom:25px;text-align:center}.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}.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:#fff;color:#fff;border-radius:12px;box-shadow:0 4px 20px rgba(0,0,0,.15);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:#10b981}.toast.error{background:#ef4444}.toast.warning{background:linear-gradient(135deg,#fffbeb,#fef3c7)}.toast.info{background:linear-gradient(135deg,var(--light-blue),#d9e9ff)}.toast.info .toast-icon{color:var(--primary-blue)}.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:#fff;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:#10b981}.toast.error .toast-progress{background:#ef4444}.toast.warning .toast-progress{background:#f59e0b}.toast.info .toast-progress{background:var(--primary-blue)}@keyframes blink{0%,50%{opacity:1}51%,to{opacity:.3}}@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:1.8rem}.product-d-price{font-size:2rem}.spec-label{flex:0 0 100px;font-size:.9rem}.spec-value{font-size:.9rem}.description-d-title{font-size:1.5rem}.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}}