:root{--sf-blue:#2479ff;--sf-purple:#7550fa;--sf-text:#263550;--sf-muted:#8693ab;--sf-line:#edf1f8;--sf-orange:#ff5139}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;min-width:320px;background:linear-gradient(120deg,#f3f8ff 0%,#eff5ff 55%,#f7f3ff 100%);color:var(--sf-text);font:15px/1.65 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}button,input,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}a{color:inherit;text-decoration:none}button,a,input{outline-offset:4px}a:focus-visible,button:focus-visible,input:focus-visible{outline:3px solid #91b9ff}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}img{max-width:100%}.sf-shell{width:calc(100% - 96px);max-width:1800px;margin:auto}
.sf-header{background:#fff;box-shadow:0 3px 25px rgba(65,104,167,.025)}.sf-header-inner{min-height:86px;display:flex;align-items:center;justify-content:space-between;gap:30px;padding-top:15px;padding-bottom:15px}.sf-brand{min-width:0;display:flex;align-items:center;font-size:24px;font-weight:800;color:#2876ef;letter-spacing:.5px;line-height:1.4}.sf-brand img{display:block;max-width:220px;max-height:54px;object-fit:contain}.sf-brand-text{max-width:680px;overflow-wrap:anywhere}.sf-nav{display:flex;gap:36px;align-items:center;flex-shrink:0}.sf-nav a{font-size:16px;color:#53647e;white-space:nowrap}.sf-nav a:hover,.sf-nav a[aria-current=page]{color:var(--sf-blue)}.sf-breadcrumb{display:flex;gap:17px;align-items:center;min-height:56px;margin:28px 0 24px;padding:13px 23px;background:#fff;border:1px solid #eaf0fa;border-radius:17px;color:#8998b1;box-shadow:0 8px 28px rgba(55,102,168,.025);font-size:14px}.sf-breadcrumb a{color:var(--sf-blue);white-space:nowrap}.sf-breadcrumb .sf-current{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.sf-breadcrumb .fa{margin-right:6px}
.sf-product-layout{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:26px;align-items:start}.sf-main{min-width:0}.sf-card{background:#fff;border:1px solid #edf2fb;border-radius:24px;box-shadow:0 18px 42px rgba(49,91,155,.075);overflow:hidden}.sf-product-hero{padding:27px;display:grid;grid-template-columns:minmax(250px,.95fr) minmax(0,1.75fr);align-items:center;gap:40px;background:radial-gradient(ellipse at 100% 0%,#eaf3ff 0%,transparent 27%),#fff}.sf-product-picture{display:flex;align-items:center;justify-content:center;aspect-ratio:1/1;border:1px solid #eaf0fe;border-radius:20px;background:linear-gradient(135deg,#f4f8ff,#f0f1ff);padding:24px;overflow:hidden}.sf-product-picture img{display:block;max-height:410px;width:100%;height:100%;object-fit:contain}.sf-product-info{min-width:0}.sf-badge{display:inline-flex;align-items:center;gap:6px;padding:5px 13px;border-radius:25px;background:#eaf3ff;color:#2683ff;font-size:13px;font-weight:700}.sf-product-title{font-size:23px;line-height:1.55;color:#2468c9;margin:25px 0 21px;font-weight:750;overflow-wrap:anywhere}.sf-intro{font-size:15px;color:var(--sf-muted);margin:0 0 22px;line-height:1.9}.sf-price-box{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:19px 23px;border-radius:18px;background:linear-gradient(115deg,#f4f7ff,#f6f1ff);margin-bottom:22px}.sf-price-caption{color:#8c9ab1;font-size:16px;margin-right:13px}.sf-price-value{color:var(--sf-orange);white-space:nowrap;font-weight:750;font-size:43px;line-height:1.3;letter-spacing:-.8px}.sf-price-value small{font-size:22px;margin-right:4px}.sf-stock{padding-left:23px;border-left:1px solid #e4e5f7;white-space:nowrap;text-align:center;color:var(--sf-muted);font-size:14px}.sf-stock strong{display:block;color:var(--sf-blue);font-size:23px;line-height:1.4;letter-spacing:.5px}.sf-quantity-row{display:flex;gap:18px;align-items:center;flex-wrap:wrap}.sf-quantity-label{font-weight:650;white-space:nowrap}.sf-stepper{display:flex;height:48px;border:1px solid #e0e8f6;border-radius:11px;overflow:hidden;background:#fff}.sf-stepper button{width:45px;border:0;background:#fff;color:#71829f;font-size:22px;line-height:1}.sf-stepper button:hover{background:#f2f6ff;color:var(--sf-blue)}.sf-stepper input{width:70px;min-width:0;border:0;border-left:1px solid #e5eaf4;border-right:1px solid #e5eaf4;text-align:center;color:#263550;background:#fff;font-size:17px;-moz-appearance:textfield}.sf-stepper input::-webkit-inner-spin-button,.sf-stepper input::-webkit-outer-spin-button{-webkit-appearance:none;margin:0}.sf-quantity-limit{font-size:14px;color:#91a0b9}.sf-quantity-note{min-height:24px;margin:12px 0 0;color:#8090a9;font-size:13px}.sf-quantity-note.sf-error{color:#db4e3c}.sf-total-preview{margin:9px 0 20px;color:#8b98ad;font-size:13px}.sf-total-preview strong{color:var(--sf-orange);font-size:16px;margin-left:5px}.sf-purchase-actions{display:flex;flex-wrap:wrap;gap:15px;margin-top:19px}.sf-button{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:58px;padding:13px 27px;border:1px solid #e0e8f7;border-radius:12px;background:#fff;color:#75849f;font-size:17px;transition:background .18s,box-shadow .18s,transform .18s;text-align:center}.sf-button:hover{background:#f7faff}.sf-button-primary{background:linear-gradient(110deg,#167dff,#7950fa);border-color:transparent;min-width:200px;color:#fff;font-weight:700;box-shadow:0 11px 25px rgba(67,103,236,.22)}.sf-button-primary:hover{background:linear-gradient(110deg,#086fe9,#6b41e9);box-shadow:0 13px 30px rgba(67,103,236,.26);transform:translateY(-1px)}.sf-discounts{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}.sf-discount{font-size:12px;padding:4px 10px;border-radius:6px;background:#fff5ee;color:#d97742}.sf-discount[aria-current=true]{background:#fff0e5;box-shadow:0 0 0 1px #ffd2b4}
.sf-section{margin-top:25px}.sf-section-heading{margin:0;padding:20px 29px;border-bottom:1px solid var(--sf-line);font-size:19px;font-weight:750;display:flex;align-items:center;gap:11px}.sf-section-heading:before{content:"";display:block;width:4px;height:22px;background:linear-gradient(var(--sf-blue),var(--sf-purple));border-radius:3px}.sf-section-body{padding:27px 30px 33px;line-height:1.95;overflow-wrap:anywhere}.sf-product-notice{padding:17px 20px;margin:0 0 23px;background:#f5f8ff;border:1px solid #eaf0fb;border-radius:13px;color:#637590}.sf-product-notice>:first-child{margin-left:0!important}.sf-product-notice p{margin:0 0 6px}.sf-rich-text{color:#4e5f78;min-height:100px;overflow-x:auto}.sf-rich-text img,.sf-product-notice img{max-width:100%!important;height:auto!important}.sf-rich-text iframe,.sf-rich-text video{max-width:100%}.sf-rich-text p{margin-top:0;margin-bottom:15px}.sf-rich-text table{max-width:100%;border-collapse:collapse}.sf-rich-text th,.sf-rich-text td{border:1px solid #e6ebf4;padding:8px}.sf-empty-detail{color:#7e8da5}.sf-help-note{margin-top:27px;padding-top:19px;border-top:1px solid var(--sf-line);font-size:14px;color:#8491a6}.sf-help-note a{color:var(--sf-blue)}.sf-aside{display:grid;gap:22px;min-width:0}.sf-aside-title{margin:0;padding:18px 20px;font-size:19px;border-bottom:1px solid var(--sf-line)}.sf-aside-title .fa{color:var(--sf-orange);margin-right:7px}.sf-support-link{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;margin:18px;padding:24px 12px;border-radius:17px;min-height:190px;background:linear-gradient(120deg,#eef6ff,#f5f0ff);transition:background .18s}.sf-support-link:hover{background:linear-gradient(120deg,#e4f0ff,#eee6ff)}.sf-support-link .fa{font-size:65px;line-height:1.3;color:#21b96c}.sf-support-link strong{font-size:19px;margin-top:5px}.sf-support-link span{font-size:13px;color:#8391a8}.sf-related-list{padding:3px 18px 7px}.sf-related-item{display:flex;align-items:center;gap:13px;padding:17px 0;border-bottom:1px solid var(--sf-line)}.sf-related-item:last-child{border-bottom:0}.sf-related-image{width:68px;height:68px;flex:0 0 68px;border-radius:12px;background:#f1f5fc;display:flex;align-items:center;justify-content:center;padding:6px}.sf-related-image img{width:100%;height:100%;object-fit:contain}.sf-related-copy{min-width:0}.sf-related-name{display:-webkit-box;-webkit-box-orient:vertical;-webkit-line-clamp:2;overflow:hidden;font-size:13px;color:#61708a;line-height:1.55}.sf-related-item:hover .sf-related-name{color:var(--sf-blue)}.sf-related-price{font-weight:750;color:var(--sf-orange);font-size:16px}.sf-footer{text-align:center;color:#97a3b6;font-size:12px;padding:36px 20px}
.sf-contact-intro{padding:33px 36px;background:radial-gradient(ellipse at 100% 0%,#e9f2ff 0%,transparent 50%),#fff}.sf-contact-intro h1{margin:13px 0 10px;font-size:30px;line-height:1.5}.sf-contact-intro p{margin:0;color:var(--sf-muted);max-width:760px}.sf-contact-layout{display:grid;grid-template-columns:minmax(0,1fr) 350px;gap:26px;margin-top:25px;align-items:start}.sf-contact-methods{display:grid;grid-template-columns:1fr 1fr;gap:24px}.sf-contact-card{padding:30px;position:relative}.sf-contact-icon{width:62px;height:62px;display:flex;align-items:center;justify-content:center;border-radius:18px;font-size:34px;margin-bottom:22px;background:#e9fbf1;color:#1bb46b}.sf-contact-icon.sf-qq{background:#ebf3ff;color:#3181ef}.sf-contact-icon.sf-phone{background:#f2edff;color:#8451e6}.sf-contact-card h2{font-size:20px;margin:0 0 6px}.sf-contact-card p{margin:0;color:var(--sf-muted);font-size:14px}.sf-contact-value{display:block;margin:21px 0;font-size:25px;font-weight:750;color:#2d68bd;letter-spacing:.5px;overflow-wrap:anywhere;user-select:all}.sf-contact-card .sf-button{font-size:15px;min-height:47px;padding:10px 21px}.sf-contact-card .sf-button-primary{min-width:0}.sf-contact-actions{display:flex;gap:10px;flex-wrap:wrap}.sf-contact-checklist{list-style:none;padding:0;margin:0;counter-reset:sf-step}.sf-contact-checklist li{counter-increment:sf-step;position:relative;padding:0 0 21px 39px;color:#71829b;font-size:14px}.sf-contact-checklist li:last-child{padding-bottom:0}.sf-contact-checklist li:before{content:counter(sf-step);position:absolute;left:0;top:1px;border-radius:9px;width:26px;height:26px;background:#eef4ff;color:var(--sf-blue);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:700}.sf-contact-checklist strong{display:block;color:#41536e;margin-bottom:3px}.sf-contact-notice{margin:24px 0 0;padding:17px 21px;border:1px solid #e4ebf8;border-radius:14px;background:rgba(255,255,255,.75);font-size:13px;color:#7b8ca6}.sf-contact-notice .fa{margin-right:6px;color:#5d8ae7}.sf-toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:1000;max-width:calc(100% - 32px);padding:12px 22px;border-radius:12px;background:#263b60;color:#fff;box-shadow:0 8px 30px #263b6026;font-size:14px;text-align:center}.sf-toast:empty{display:none}
@media(min-width:1600px){.sf-product-hero{gap:42px;padding:28px}.sf-product-title{font-size:24px}.sf-product-info{padding:3px 3px 3px 0}.sf-price-box{margin-top:24px;margin-bottom:24px}}
@media(max-width:1250px){.sf-shell{width:calc(100% - 48px)}.sf-product-layout{grid-template-columns:minmax(0,1fr) 260px;gap:20px}.sf-product-hero{grid-template-columns:minmax(210px,.9fr) minmax(0,1.2fr);gap:25px;padding:23px}.sf-product-title{font-size:20px;margin:18px 0}.sf-price-box{padding:16px;gap:12px}.sf-price-value{font-size:34px}.sf-price-caption{font-size:14px;display:block;margin:0 0 4px}.sf-stock{padding-left:16px}.sf-price-value small{font-size:18px}.sf-quantity-row{gap:12px}.sf-button{min-height:52px;padding:12px 19px;font-size:15px}.sf-button-primary{min-width:165px}.sf-nav{gap:23px}.sf-brand-text{max-width:550px}.sf-contact-layout{grid-template-columns:minmax(0,1fr) 300px}.sf-contact-card{padding:25px}.sf-contact-value{font-size:22px}}
@media(max-width:1000px){.sf-product-layout,.sf-contact-layout{grid-template-columns:1fr}.sf-product-hero{grid-template-columns:minmax(230px,.85fr) minmax(0,1.25fr);gap:30px}.sf-aside{grid-template-columns:1fr 1fr}.sf-support-link{min-height:186px}.sf-header-inner{gap:18px}.sf-brand{font-size:20px}.sf-brand-text{max-width:400px}.sf-nav{gap:18px}.sf-nav a{font-size:14px}.sf-contact-layout{gap:24px}.sf-contact-value{font-size:25px}}
@media(max-width:700px){.sf-shell{width:calc(100% - 28px)}.sf-header-inner{min-height:76px;flex-wrap:wrap;justify-content:center;gap:13px;padding:14px 0}.sf-brand{justify-content:center;font-size:18px;width:100%;text-align:center}.sf-brand-text{max-width:100%}.sf-brand img{max-width:190px;max-height:43px}.sf-nav{width:100%;justify-content:space-between;gap:10px}.sf-nav a{font-size:13px}.sf-breadcrumb{margin:17px 0;gap:11px;min-height:47px;padding:10px 15px;border-radius:13px;font-size:12px}.sf-card{border-radius:18px}.sf-product-hero{grid-template-columns:1fr;gap:22px;padding:19px}.sf-product-picture{aspect-ratio:4/3;max-height:310px;padding:23px}.sf-product-picture img{max-height:260px}.sf-product-title{font-size:20px;margin:15px 0}.sf-badge{font-size:12px}.sf-intro{font-size:13px;margin-bottom:18px}.sf-price-box{padding:17px 18px;margin-bottom:18px}.sf-price-caption{display:inline;font-size:13px}.sf-price-value{font-size:35px}.sf-stock{font-size:12px}.sf-stock strong{font-size:20px}.sf-quantity-label{font-size:14px}.sf-stepper{height:44px}.sf-stepper button{width:40px}.sf-stepper input{width:58px;font-size:16px}.sf-quantity-limit{font-size:12px}.sf-purchase-actions{gap:10px;margin-top:16px;flex-wrap:nowrap}.sf-purchase-actions .sf-button{flex:1;min-width:0;padding:12px 8px;font-size:15px;min-height:51px}.sf-total-preview{margin-bottom:14px}.sf-section{margin-top:18px}.sf-section-heading{font-size:17px;padding:17px 19px;gap:9px}.sf-section-body{padding:21px 19px;font-size:14px}.sf-aside{grid-template-columns:1fr;gap:18px}.sf-aside-title{font-size:17px;padding:16px 19px}.sf-support-link{margin:15px;min-height:150px;padding:16px}.sf-support-link .fa{font-size:49px}.sf-support-link strong{font-size:17px}.sf-related-list{padding:0 19px}.sf-related-item{padding:15px 0}.sf-related-image{width:61px;height:61px;flex-basis:61px}.sf-related-name{font-size:14px}.sf-footer{padding:28px 20px}.sf-contact-intro{padding:24px 22px}.sf-contact-intro h1{font-size:25px}.sf-contact-intro p{font-size:14px}.sf-contact-layout{margin-top:18px;gap:18px}.sf-contact-methods{grid-template-columns:1fr;gap:18px}.sf-contact-card{padding:25px}.sf-contact-icon{width:54px;height:54px;font-size:29px;margin-bottom:16px}.sf-contact-value{margin:17px 0;font-size:25px}.sf-contact-notice{margin-top:18px}.sf-contact-checklist li{font-size:13px}.sf-contact-card .sf-button{font-size:14px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important}}

/* Desktop product spacing */
@media(min-width:701px){#product-page .sf-product-title{margin:18px 0 12px}#product-page .sf-intro{margin-bottom:16px}#product-page .sf-price-box{margin-top:16px;margin-bottom:18px}#product-page .sf-section{margin-top:20px}#product-page .sf-section-heading{padding-top:16px;padding-bottom:16px}#product-page .sf-section-body{padding-top:19px;padding-bottom:27px}}