:root{--primary:#e20001;--primary-light:#fff5f5;--primary-shadow:rgba(226, 0, 1, 0.08);--bg-page:#fafafa;--bg-card:#ffffff;--text-primary:#1c1c1c;--text-secondary:#6f6f6f;--text-muted:#b0b0b0;--border-light:#f0f0f0;--radius-card:20px;--radius-container:32px;--radius-pill:40px;--shadow-card:0 4px 16px rgba(0, 0, 0, 0.02),0 1px 4px rgba(0, 0, 0, 0.02);--shadow-hover:0 12px 32px var(--primary-shadow),0 4px 12px rgba(0, 0, 0, 0.04);--font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,sans-serif;--max-width:1200px;--nav-height:72px}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);background-color:var(--bg-page);color:var(--text-primary);line-height:1.6;padding-top:var(--nav-height)}a{text-decoration:none;color:inherit}ul{list-style:none}.site-header{position:fixed;top:0;left:0;right:0;z-index:1000;background:var(--primary);box-shadow:0 2px 20px rgba(226,0,1,.15)}.navbar{max-width:var(--max-width);margin:0 auto;padding:0 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rgba(255,255,255,.08)}.nav-menu.open{display:flex}.nav-links{flex-direction:column;width:100%;gap:2px}.nav-links a{width:100%;padding:10px 16px;text-align:center}.hero-content h1{font-size:32px}.hero-content p{font-size:16px}.product-grid{grid-template-columns:1fr;gap:16px}.features-grid{grid-template-columns:1fr;padding:0 16px;gap:20px}.process-steps{grid-template-columns:1fr;gap:16px}.guarantee-grid{grid-template-columns:1fr;padding:0 16px;gap:20px}.after-sale-grid{grid-template-columns:1fr}.faq-list{padding:0 16px}.section-title{font-size:24px}.filter-bar{gap:6px}.filter-btn{padding:4px 14px;font-size:13px}.product-body{padding:14px 16px 16px}.product-body h3{font-size:16px;min-height:44px}.product-price{font-size:20px}.faq-section,.features-section,.guarantee-section{padding:32px 0;border-radius:24px}.process-section{padding:32px 0}.hero-section{padding:40px 0 50px;border-radius:0 0 32px 32px}}@media (max-width:480px){.hero-content h1{font-size:26px}.hero-content 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8px;color:var(--text-muted)}.product-d-detail{background:var(--bg-card);border-radius:var(--radius-card);padding:30px;box-shadow:var(--shadow-card);border:1px solid var(--border-light);margin-bottom:60px;display:grid;grid-template-columns:1fr 1fr;gap:40px;transition:all .25s ease}.product-d-info,.purchase-options{border:none}.product-d-title{font-size:28px;font-weight:700;margin-bottom:15px;color:var(--text-primary);letter-spacing:-.3px;line-height:1.3}.product-d-price{font-size:32px;font-weight:700;color:var(--primary);margin-bottom:25px;display:flex;align-items:center;gap:8px}.product-d-price::before{content:'$';font-size:20px;font-weight:600}.product-d-specs{margin-bottom:25px;background:var(--bg-page);border-radius:var(--radius-card);padding:4px 0}.spec-row{display:flex;padding:14px 18px;border-bottom:1px solid var(--border-light);align-items:center}.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;font-size:14px}.spec-label i{color:var(--text-muted);font-size:13px;width:18px}.spec-value{flex:1;font-weight:600;color:var(--text-primary);font-size:14px}.spec-value.highlight{color:#10b981}.option-title{font-size:20px;font-weight:600;margin-bottom:25px;color:var(--text-primary);display:flex;align-items:center;gap:10px}.option-title i{color:var(--primary)}.form-group{margin-bottom:25px}.form-label{display:block;margin-bottom:10px;color:var(--text-secondary);font-weight:500;font-size:14px}.required{color:var(--primary)}.email-input{width:100%;padding:12px 18px;border:2px solid var(--border-light);border-radius:var(--radius-pill);font-size:15px;font-family:var(--font-family);transition:all .2s ease;background:var(--bg-page);color:var(--text-primary)}.email-input:focus{outline:0;border-color:var(--primary);box-shadow:0 0 0 4px 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0;font-size:16px;font-weight:600;color:var(--text-primary);outline:0;min-width:60px;font-family:var(--font-family)}.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:14px;color:var(--text-primary);margin-bottom:10px;font-weight:600}.payment-methods{display:flex;gap:10px;flex-wrap:wrap}.payment-method{flex:1;min-width:100px;padding:12px 10px;border:2px solid var(--border-light);border-radius:var(--radius-card);background:var(--bg-card);cursor:pointer;transition:all .2s ease;text-align:center;font-size:13px;font-weight:500;color:var(--text-secondary)}.payment-method.selected,.payment-method:hover{border-color:var(--primary);background:var(--primary-light);color:var(--text-primary);box-shadow:0 0 0 4px var(--primary-shadow)}.payment-method 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strong{color:var(--text-primary)}.related-products{margin-bottom:80px}.section-title{font-size:28px;font-weight:700;margin-bottom:12px;text-align:center;color:var(--text-primary);letter-spacing:-.3px;display:flex;align-items:center;justify-content:center;gap:10px}.section-title i{color:var(--primary)}.section-subtitle{font-size:15px;color:var(--text-secondary);text-align:center;margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.ks-product-card{background:var(--bg-card);border-radius:var(--radius-card);padding:24px 22px 26px;box-shadow:var(--shadow-card);transition:all .25s ease;border:1px solid var(--border-light);display:flex;flex-direction:column}.ks-product-card-title{font-size:17px;font-weight:600;margin-bottom:10px;color:var(--text-primary);display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:48px;line-height:1.4}.ks-product-card-description{color:var(--text-secondary);margin-bottom:14px;font-size:13px;line-height:1.6;flex-grow:1;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.ks-product-card-price{color:var(--primary);font-weight:700;font-size:22px;margin-bottom:16px;display:flex;align-items:center;gap:4px}.ks-product-card-price::before{content:'$';font-size:16px;font-weight:600}.ks-product-card-action{flex-grow:0}.ks-product-card-action .btn{padding:10px 20px;font-size:14px;flex:0 1 auto}.modal-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.6);backdrop-filter:blur(4px);-webkit-backdrop-filter:blur(4px);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(--bg-card);border-radius:var(--radius-container);max-width:900px;width:90%;max-height:90vh;overflow-y:auto;transform:scale(.95);transition:transform .3s ease;box-shadow:0 30px 80px rgba(0,0,0,.25)}.modal-overlay.active .modal-content{transform:scale(1)}.modal-header{padding:24px 30px;border-bottom:1px solid var(--border-light);display:flex;align-items:center;justify-content:space-between}.modal-title{font-weight:700;color:var(--text-primary);gap:10px;font-size:22px;display:flex;align-items:center}.modal-title i{color:var(--primary)}.close-btn{font-size:20px;width:40px;height:40px;border:none;background:var(--bg-page);border-radius:50%;cursor:pointer;display:flex;align-items:center;justify-content:center;color:var(--text-secondary);transition:all .3s ease}.close-btn:hover{background:var(--primary-light);color:var(--primary)}.modal-body{padding:30px;display:grid;grid-template-columns:1fr 1fr;gap:30px}.order-summary{background:var(--bg-page);padding:24px 26px;border-radius:var(--radius-card);border:1px solid var(--border-light)}.summary-title{font-size:17px;font-weight:600;color:var(--text-primary);margin-bottom:18px;gap:8px;display:flex;align-items:center}.summary-title i{color:var(--primary)}.summary-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid var(--border-light)}.summary-row:last-child{border-bottom:none;padding-top:14px;margin-top:6px;border-top:2px solid var(--border-light)}.summary-label{color:var(--text-secondary);font-size:14px}.summary-value{font-weight:600;color:var(--text-primary)}.summary-value.total{font-size:24px;color:var(--primary)}.summary-value.total::after{font-size:18px;content:' USDT'}.payment-title{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:15px;display:flex;align-items:center;gap:8px}.payment-title i{color:var(--primary)}.selected-payment{background:#f0fdf4;border:2px solid #10b981;padding:14px 18px;border-radius:var(--radius-card);display:flex;align-items:center;gap:14px;margin-bottom:18px}.selected-payment .payment-icon{font-size:28px;color:#10b981}.qr-section{text-align:center;padding:16px 0;margin-bottom:16px}.qr-code{width:180px;height:180px;margin:0 auto 14px;background:var(--bg-card);padding:12px;border-radius:var(--radius-card);display:flex;align-items:center;justify-content:center;font-size:13px;color:var(--text-muted);border:2px solid var(--border-light)}.address-section{background:var(--bg-card);border:2px solid var(--border-light);border-radius:var(--radius-card);padding:16px 18px;margin-bottom:16px;position:relative;transition:all .2s ease}.address-section:hover{border-color:var(--primary)}.address-label{font-size:13px;color:var(--text-secondary);margin-bottom:6px;display:flex;align-items:center;gap:5px}.address-label i{color:var(--primary)}.address-value{font-size:14px;word-break:break-all;color:var(--text-primary);line-height:1.5;padding-right:50px;width:90%}.copy-btn{position:absolute;right:12px;top:50%;transform:translateY(-50%);background:var(--primary);color:#fff;border:none;padding:6px 16px;border-radius:var(--radius-pill);font-size:13px;cursor:pointer;transition:all .2s ease;display:flex;align-items:center;gap:5px;font-family:var(--font-family);font-weight:500}.copy-btn:hover{background:#cc0001;transform:translateY(-50%) scale(1.02)}.copy-btn.copied{background:#10b981}.btn-confirm{background:var(--primary);color:#fff;padding:14px 26px;border:none;border-radius:var(--radius-pill);font-size:15px;cursor:pointer;transition:all .2s ease;font-weight:600;width:100%;display:flex;align-items:center;justify-content:center;gap:8px;font-family:var(--font-family);box-shadow:0 4px 16px rgba(226,0,1,.25)}.btn-confirm:hover:not(:disabled){background:#cc0001;box-shadow:0 8px 28px rgba(226,0,1,.3)}.btn-confirm:disabled{opacity:.6;cursor:not-allowed;transform:none}.countdown-section{background:var(--primary-light);padding:18px 22px;border-radius:var(--radius-card);margin-bottom:22px;text-align:center;border:1px solid rgba(226,0,1,.06)}.countdown-title{font-size:14px;color:var(--primary);margin-bottom:8px;font-weight:600;display:flex;align-items:center;justify-content:center;gap:6px}.countdown-timer{font-size:34px;font-weight:700;color:var(--primary);font-family:'Courier New',monospace;letter-spacing:2px}.countdown-timer.warning{animation:blink 1s ease-in-out infinite}@keyframes blink{0%,50%{opacity:1}100%,51%{opacity:.4}}.countdown-hint{font-size:12px;color:var(--text-secondary);margin-top:6px}.toast-container{position:fixed;top:20px;right:20px;z-index:9999;pointer-events:none}.toast{background:var(--bg-card);color:var(--text-primary);border-radius:var(--radius-card);box-shadow:0 8px 32px rgba(0,0,0,.12);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;border-left:4px solid var(--primary)}.toast.show{transform:translateX(0);opacity:1}.toast.success{border-left-color:#10b981}.toast.error{border-left-color:var(--primary)}.toast.warning{border-left-color:#f59e0b;background:linear-gradient(135deg,#fffbeb,#fef3c7)}.toast.info{border-left-color:#3b82f6;background:linear-gradient(135deg,#eff6ff,#dbeafe)}.toast-icon{margin-right:12px;flex-shrink:0;font-size:18px}.toast.success .toast-icon{color:#10b981}.toast.error .toast-icon{color:var(--primary)}.toast.warning .toast-icon{color:#f59e0b}.toast.info .toast-icon{color:#3b82f6}.toast-content{flex:1}.toast-title{font-weight:600;font-size:14px;margin-bottom:2px;color:var(--text-primary)}.toast-message{font-size:13px;line-height:1.4;color:var(--text-secondary)}.toast-close{position:absolute;top:8px;right:8px;background:0 0;border:none;font-size:18px;color:var(--text-muted);cursor:pointer;padding:4px;line-height:1;opacity:.6;transition:opacity .2s;font-family:var(--font-family)}.toast-close:hover{opacity:1}.toast-progress{position:absolute;bottom:0;left:0;height:3px;background:var(--primary);border-radius:0 0 var(--radius-card) var(--radius-card);transform-origin:left;animation:progress linear forwards}@keyframes progress{0%{transform:scaleX(1)}100%{transform:scaleX(0)}}@media (max-width:1024px){.product-grid{grid-template-columns:repeat(2,1fr)}}@media (max-width:768px){.breadcrumb{margin:20px 0;font-size:13px}.product-d-detail{grid-template-columns:1fr;gap:24px;padding:20px;border-radius:16px}.product-d-title{font-size:22px}.product-d-price{font-size:26px}.spec-label{flex:0 0 110px;font-size:13px}.feature-list{grid-template-columns:1fr}.action-buttons{flex-direction:column}.payment-methods{display:grid;grid-template-columns:repeat(3,1fr)}.payment-method{min-width:auto}.modal-body{grid-template-columns:1fr;gap:20px;padding:20px}.modal-header{padding:18px 20px}.modal-title{font-size:20px}.product-grid{grid-template-columns:1fr}.section-title{font-size:24px}.total-price{padding:14px 18px}.total-amount{font-size:24px}.container{padding:0 16px}}@media (max-width:480px){.product-d-title{font-size:19px}.product-d-price{font-size:22px}.spec-label{flex:0 0 100px;font-size:12px}.spec-value{font-size:13px}.description-d-title{font-size:18px}.modal-content{width:95%;max-height:95vh;margin:10px}.modal-body{padding:16px}.address-value{font-size:12px;padding-right:40px}.copy-btn{font-size:11px;padding:4px 12px}.quantity-selector{max-width:140px}.quantity-btn{width:38px;height:38px}.quantity-input{height:38px;font-size:14px}.btn{padding:12px 20px;font-size:14px}.ks-product-card{padding:18px 16px 20px}}