:root{--page-max:1200px;--page-gutter:24px;scrollbar-gutter:stable;--ink:#293b4a;--navy:#2e4252;--red:#8b352f;--red-dark:#702722;--paper:#f7f5ef;--line:#dddcd5;--muted:#74808a;--white:#fff;--gold:#a78d65;color-scheme:light;font-family:"Microsoft YaHei","PingFang SC",system-ui,sans-serif;font-size:14px;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{margin:0;padding-bottom:31px}a{color:inherit;text-decoration:none}a:hover{color:var(--red)}button,input,select{font:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #b08e52;outline-offset:3px}img{max-width:100%;height:auto}svg{stroke:currentColor;fill:none;stroke-width:1.7}h1,h2,h3,p{margin-top:0}button{border:0}h1,h2,h3{font-weight:600}h1{font-size:25px;line-height:1.6}h2{font-size:21px}h3{font-size:15px}.wrap{width:min(var(--page-max),calc(100% - 2 * var(--page-gutter)));margin-inline:auto}.visually-hidden{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden}.skip-link{position:fixed;left:15px;top:-60px;z-index:90;background:var(--white);padding:12px}.skip-link:focus{top:10px}
.info-bar{border-bottom:1px solid var(--line);background:#f0eee7;font-size:12px;line-height:31px}.info-bar .wrap{display:flex;justify-content:space-between;gap:12px}.info-bar a{margin-left:20px;color:var(--red)}.masthead{display:flex;justify-content:space-between;align-items:center;gap:40px;padding-block:16px}.brand{display:flex;gap:12px;align-items:center;flex-shrink:0}.brand img{width:68px;height:auto;object-fit:contain;background:transparent}.brand strong{display:block;font-family:"Songti SC","SimSun",serif;font-size:28px;letter-spacing:3px;color:var(--ink)}.brand small{display:block;font-size:11px;margin-top:7px;letter-spacing:1px;color:var(--muted)}.brand i{font-style:normal;color:var(--gold);margin:0 5px}.search-area{width:490px;max-width:50%}.search-field{display:flex;align-items:center;border:1px solid #b5bdc1;border-radius:3px;background:white;overflow:hidden}.search-field:focus-within{outline:2px solid #a78d6580;outline-offset:2px}.search-field svg{margin:0 12px;flex-shrink:0;color:var(--muted)}.search-field input{min-width:0;width:100%;border:0;outline:none;background:transparent;height:40px;padding:0 5px}.search-field button{white-space:nowrap;flex-shrink:0;align-self:stretch;padding:0 25px;background:var(--navy);color:#fff;letter-spacing:2px}.search-field button:hover{background:var(--red)}.search-hints{display:flex;gap:16px;padding-top:8px;font-size:11px;color:#6e777c}.search-hints span{color:#989b98}.nav-band{background:var(--navy);color:white}.main-nav{display:grid;grid-template-columns:repeat(10,minmax(0,1fr));align-items:stretch;min-height:44px}.main-nav #primary-links{display:contents}.main-nav a{display:flex;align-items:center;justify-content:center;gap:8px;min-width:0;padding:13px 6px;white-space:nowrap;font-size:14px}.main-nav a:hover,.main-nav a[aria-current=page]{background:#20313e;color:#fff}.main-nav .category-entry{background:var(--red)}.main-nav .category-entry:hover{background:var(--red-dark)}.subnav{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:9px 18px;padding:12px 17px;background:#eeede7;border:1px solid var(--line);border-top:0;font-size:11px;line-height:1.9;margin-bottom:20px}.subnav-group{display:flex;gap:9px;align-items:flex-start;min-width:0}.subnav-group>a{font-weight:600;white-space:nowrap;color:var(--red)}.subnav-group div{display:flex;flex-wrap:wrap;gap:0 9px}
.section{margin-bottom:28px}.section-heading{border-bottom:2px solid var(--navy);display:flex;align-items:center;justify-content:space-between;gap:10px;padding:0 0 11px}.section-heading h1,.section-heading h2{margin:0;font-size:20px;font-family:"Songti SC","SimSun",serif;font-weight:700}.section-heading h2::before{content:"";display:inline-block;width:4px;height:17px;background:var(--red);margin-right:10px;vertical-align:-1px}.section-heading small{font-family:Georgia,serif;font-size:13px;color:#8c9394;font-weight:400;letter-spacing:1px;margin-left:12px}.section-heading>a{font-size:12px;color:var(--muted)}.section-description{font-size:12px;color:var(--muted);line-height:1.8;margin:10px 0}.product-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:13px;margin-top:14px}.product-card{background:white;border:1px solid var(--line);min-width:0;transition:border-color .15s,box-shadow .15s}.product-card:hover{border-color:#b6a383;box-shadow:0 3px 12px #273d4c09}.book-cover{display:flex;align-items:center;justify-content:center;background:#fcfbf7;margin:10px 10px 0;padding:9px;height:184px;border-bottom:1px solid #f0eee8;position:relative}.book-cover img{width:100%;height:100%;object-fit:contain}.cover-missing{display:flex;align-items:center;justify-content:center;border:1px solid var(--line);background:#f3f0e7;color:var(--muted);font-family:"SimSun",serif;width:100%;height:100%;min-height:80px;font-size:14px;letter-spacing:2px}.card-copy{padding:12px}.card-copy h3{margin:0;line-height:1.65;font-size:13px;font-weight:400;height:43px;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.card-copy .format{display:block;color:#8a8e8e;font-size:10px;letter-spacing:.5px;margin:8px 0}.card-bottom{border-top:1px solid #eeeae3;padding-top:9px;display:flex;align-items:center;justify-content:space-between;gap:4px}.price{color:var(--red);font-family:Georgia,"Microsoft YaHei",serif;font-size:20px;font-weight:700;white-space:nowrap}.price small{font-size:12px;margin-right:4px}.card-bottom a{font-size:11px;color:var(--muted)}.card-bottom a:hover{color:var(--red)}.recommendation-strip{margin:12px 0 0;display:flex;gap:14px;font-size:12px;background:#f0ece2;padding:10px 14px;border-left:3px solid var(--gold);line-height:1.7}.recommendation-strip b{white-space:nowrap;color:var(--red)}.recommendation-strip span{display:flex;gap:15px;flex-wrap:wrap}.breadcrumb{font-size:12px;color:var(--muted);margin:0 0 16px;display:flex;gap:9px;flex-wrap:wrap;line-height:1.8}.breadcrumb a{color:var(--ink)}.content-columns{display:grid;grid-template-columns:218px minmax(0,1fr);gap:24px;margin-bottom:30px}.sidebar{background:#f0eee7;border:1px solid var(--line);align-self:start}.sidebar>summary{font-size:17px;font-weight:600;padding:13px 15px;border-bottom:2px solid var(--navy);list-style:none;pointer-events:none}.tree{padding:2px 13px 12px}.tree-group{border-bottom:1px solid #d9d8d0;padding:9px 0}.tree-group:last-child{border:0}.tree-title{display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:600;padding:4px 2px}.tree ul{margin:3px 0 0;padding:0;list-style:none}.tree li a{display:flex;align-items:center;justify-content:space-between;gap:5px;padding:6px 8px;font-size:12px}.tree li a::before{content:"·";color:#a18c6b}.tree li a span:first-child{flex:1}.tree a[aria-current=page]{background:#e6dbcf;color:var(--red)}.tree-count{color:#8b8d88;font-size:10px;font-variant-numeric:tabular-nums}.content{min-width:0}.list-top{display:flex;justify-content:space-between;gap:10px;align-items:center;border-bottom:2px solid var(--navy);padding:0 0 13px}.list-top h1{font-size:22px;font-family:"SimSun",serif;margin:0}.list-top p{font-size:12px;margin:0;color:var(--muted)}.filter-chips{display:flex;flex-wrap:wrap;gap:7px;margin:12px 0}.filter-chips a{border:1px solid var(--line);padding:5px 10px;background:white;font-size:12px}.filter-chips a:hover,.filter-chips a[aria-current=page]{border-color:var(--red);color:var(--red)}.product-row{display:grid;grid-template-columns:88px minmax(0,1fr) 115px;gap:18px;align-items:center;background:#fff;border-bottom:1px solid var(--line);padding:16px}.row-cover{height:114px;background:#fcfbf7;border:1px solid #ece9e1;padding:5px;display:flex;align-items:center;justify-content:center}.row-cover img{width:100%;height:100%;object-fit:contain}.row-copy h2{font-size:14px;line-height:1.8;margin:0 0 10px;font-weight:500}.row-copy p{font-size:11px;line-height:1.8;color:var(--muted);margin:0;display:flex;gap:7px 15px;flex-wrap:wrap}.row-action{text-align:right}.row-action .price{display:block;font-size:20px;margin-bottom:13px}.small-button,.button{display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--line);background:#fff;min-height:32px;padding:7px 13px;font-size:12px;border-radius:2px}.small-button:hover,.button:hover{border-color:var(--red);color:var(--red)}.primary{background:var(--red);border-color:var(--red);color:#fff}.primary:hover{background:var(--red-dark);color:#fff}.pagination{display:flex;gap:5px;align-items:center;justify-content:center;flex-wrap:wrap;padding:23px 0}.pagination a,.pagination span{min-width:32px;padding:7px 10px;text-align:center;font-size:12px}.pagination a{border:1px solid var(--line);background:white}.pagination a[aria-current=page]{background:var(--navy);border-color:var(--navy);color:white}.pagination .disabled{color:#aaa}
.product-summary{display:grid;grid-template-columns:290px minmax(0,1fr);gap:28px;background:#fff;padding:20px;border:1px solid var(--line)}.detail-cover{height:355px;background:#fcfbf7;display:flex;align-items:center;justify-content:center;padding:12px;border:1px solid #ece9e1}.detail-cover img{width:100%;height:100%;object-fit:contain}.product-info h1{font-size:20px;line-height:1.7;margin:0 0 16px}.eyebrow{font-size:11px;color:var(--gold);letter-spacing:2px;display:block;margin:0 0 9px}.detail-price{padding:13px 0;border-block:1px solid #e9e5dd;display:flex;align-items:center;gap:23px;margin-bottom:14px}.detail-price>span{font-size:12px;color:var(--muted)}.detail-price .price{font-size:31px;color:var(--red)}.facts{display:grid;grid-template-columns:85px minmax(0,1fr);gap:10px 6px;font-size:12px;line-height:1.7;margin:0 0 18px}.facts dt{color:var(--muted)}.facts dd{margin:0;overflow-wrap:anywhere}.purchase-box{border-top:1px solid #e9e5dd;padding-top:16px}.purchase-box .button{font-size:15px;padding:11px 30px;min-height:44px}.payment-methods{font-size:12px;color:var(--muted);margin:10px 0 0}.payment-methods span{display:inline-block;margin:0 9px 0 0}.product-details{margin-top:23px;background:#fff;border:1px solid var(--line)}.detail-heading{font-size:16px;margin:0;background:#efeee7;border-bottom:1px solid var(--line);padding:12px 18px}.detail-body{padding:22px;font-size:14px;line-height:1.9;overflow-wrap:anywhere}.detail-body img{display:block;max-width:100%!important;height:auto!important;margin:14px auto}.detail-body table{display:block;overflow:auto;max-width:100%;border-collapse:collapse}.detail-body td,.detail-body th{border:1px solid var(--line);padding:8px}.detail-body p{margin:8px 0}.empty,.loading,.error-box{padding:44px 20px;text-align:center;background:#fff;border:1px solid var(--line);line-height:1.9;color:var(--muted)}.empty h2{color:var(--ink);font-size:20px}.empty .button,.error-box .button{margin-top:12px}.help-page{width:100%;margin:0 0 32px;padding:28px;background:white;border:1px solid var(--line);line-height:1.9}.help-page h2{font-size:18px;margin-top:28px}.contact-block{display:flex;gap:32px;align-items:center}.contact-block img{width:180px;height:180px}.contact-block a{color:var(--red)}.footer{border-top:3px solid var(--navy);background:#efede6;margin-top:35px}.footer-top{display:flex;justify-content:space-between;gap:28px;padding-block:28px;font-size:12px}.footer-top strong{font-family:"SimSun",serif;font-size:20px}.footer-top p{color:var(--muted);margin:8px 0 0;font-size:11px}.footer nav{display:flex;gap:20px;align-items:center}.footer-contact{display:flex;flex-direction:column;gap:6px}.footer-contact span{color:var(--muted);font-size:11px}.preview-bar{position:fixed;bottom:0;left:0;right:0;z-index:25;height:31px;background:#293b4af0;color:#fff;display:flex;align-items:center;justify-content:center;gap:9px;font-size:11px;letter-spacing:.5px}.preview-dot{width:5px;height:5px;background:#d7b57c;border-radius:100%}.preview-detail{color:#c7ced2}dialog{padding:32px;max-width:460px;width:calc(100% - 32px);border:1px solid var(--line);border-radius:5px;color:var(--ink);box-shadow:0 20px 80px #0004}dialog::backdrop{background:#1b28396b}dialog p{font-size:14px;line-height:1.9;color:var(--muted)}.dialog-close{position:absolute;right:10px;top:6px;font-size:25px;background:transparent;color:var(--muted)}dialog h2{font-size:22px}
@media(min-width:1440px){.book-cover{height:196px}}
@media(max-width:1199px){.main-nav a{font-size:13px}.product-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.subnav{grid-template-columns:repeat(3,minmax(0,1fr))}.brand strong{font-size:25px}.search-area{width:430px}.content-columns{grid-template-columns:190px minmax(0,1fr);gap:18px}.product-summary{grid-template-columns:220px minmax(0,1fr);gap:20px;padding:16px}.detail-cover{height:290px}.search-hints{gap:12px}}
@media(max-width:850px){:root{--page-gutter:16px}.main-nav{grid-template-columns:repeat(5,minmax(0,1fr))}.masthead{gap:20px}.brand img{width:52px}.brand strong{font-size:23px;letter-spacing:1px}.brand small{font-size:10px;letter-spacing:0}.search-area{max-width:48%}.search-hints a:nth-last-child(-n+2){display:none}.search-field button{padding-inline:17px}.product-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.book-cover{height:180px}.content-columns{grid-template-columns:174px minmax(0,1fr);gap:15px}.product-summary{grid-template-columns:1fr}.detail-cover{height:300px;max-width:280px;margin:auto;width:100%}.product-row{grid-template-columns:70px minmax(0,1fr);gap:13px;padding:13px}.row-cover{grid-row:span 2;height:97px}.row-action{grid-column:2;display:flex;align-items:center;gap:18px;justify-content:space-between;text-align:left}.row-action .price{font-size:18px;margin:0}.row-copy h2{font-size:13px;margin-bottom:7px}.row-copy p{font-size:10px;gap:4px 10px}.footer nav{display:grid;grid-template-columns:1fr 1fr;gap:8px 18px}}
@media(max-width:600px){:root{--page-gutter:12px}.info-bar{font-size:10px;line-height:29px}.info-bar a{margin-left:0}.info-bar a:not(:last-child){display:none}.masthead{display:block;padding:11px 0 12px}.brand{gap:9px}.brand img{width:50px}.brand strong{font-size:24px}.brand small{margin-top:4px}.search-area{width:100%;max-width:none;margin-top:12px}.search-field input{height:38px;font-size:12px}.search-hints{font-size:10px;gap:13px}.search-hints a:nth-last-child(-n+2){display:block}.main-nav{grid-template-columns:repeat(4,minmax(0,1fr))}.main-nav>a{grid-column:span 2}.main-nav a{padding:11px 6px;font-size:12px}#primary-links a{padding:9px 3px;font-size:11px}.subnav{grid-template-columns:1fr 1fr;padding:9px;gap:5px 10px;font-size:10px;margin-bottom:17px}.subnav-group{gap:7px}.subnav-group div a:nth-child(n+3){display:none}.subnav-group div{gap:0 7px}.section-heading{padding-bottom:9px}.section-heading h1,.section-heading h2{font-size:18px}.section-heading small{font-size:10px;letter-spacing:0;margin-left:7px}.section-heading>a{font-size:10px}.section-description{font-size:10px}.product-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:9px;margin-top:10px}.book-cover{height:160px;margin:7px 7px 0;padding:6px}.card-copy{padding:9px}.card-copy h3{font-size:12px;height:40px}.card-copy .format{font-size:9px}.price{font-size:18px}.card-bottom a{font-size:10px}.section{margin-bottom:24px}.recommendation-strip{font-size:10px;padding:8px;gap:9px}.recommendation-strip span{gap:7px}.content-columns{display:block}.sidebar{margin-bottom:17px}.sidebar>summary{pointer-events:auto;cursor:pointer;font-size:14px;display:flex;justify-content:space-between;padding:10px 13px}.sidebar>summary::after{content:'展开 / 收起';font-size:11px;font-weight:400;color:var(--muted)}.tree{display:grid;grid-template-columns:1fr 1fr;gap:0 12px}.tree-group{min-width:0}.tree-title{font-size:12px}.tree li a{font-size:11px;padding:5px}.tree-count{font-size:9px}.breadcrumb{font-size:10px;margin-bottom:12px}.list-top h1{font-size:19px}.list-top p{font-size:10px}.product-row{grid-template-columns:66px minmax(0,1fr);padding:12px;gap:9px 12px}.row-cover{height:95px}.row-action .price{font-size:17px}.row-action .small-button{font-size:10px;padding:5px 9px;min-height:28px}.filter-chips a{font-size:10px;padding:4px 8px}.pagination{gap:4px}.pagination a,.pagination span{font-size:11px;min-width:26px;padding:6px 7px}.product-summary{padding:14px;gap:20px}.detail-cover{height:275px;max-width:240px}.product-info h1{font-size:18px}.product-details{margin-top:18px}.detail-body{padding:14px;font-size:13px}.help-page{padding:20px}.contact-block{display:block}.contact-block img{display:block;margin:0 auto 20px}.footer-top{flex-wrap:wrap;gap:22px;padding-block:20px}.footer-top>div:first-child{flex-basis:100%}.footer-top strong{font-size:20px}.footer nav{font-size:11px}.footer-contact{font-size:11px}.preview-bar{font-size:10px;gap:5px}.preview-detail{font-size:9px}.loading{padding:30px 15px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

.product-disclaimer{margin-top:18px;padding:18px 22px;border:1px solid var(--line);background:#f0eee7;color:#626d73;font-size:12px;line-height:1.9;overflow-wrap:anywhere}.product-disclaimer h2{font-size:14px;font-weight:600;color:var(--ink);margin:0 0 10px}.product-disclaimer p{margin:0;text-indent:0;text-align:left}.product-disclaimer p+p{margin-top:10px}
@media(max-width:600px){.product-disclaimer{padding:14px;font-size:12px}.product-disclaimer h2{font-size:13px}}

/* Scoped product transaction refinement; other page layouts remain frozen. */
.product-info .detail-facts{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));margin:20px 0 0;border:1px solid var(--line);font-size:12px;line-height:1.65}
.product-info .detail-facts>div{min-width:0;border-right:1px solid var(--line)}
.product-info .detail-facts>div:last-child{border-right:0}
.product-info .detail-facts dt{margin:0;padding:9px 11px;background:#efeee7;border-bottom:1px solid var(--line);color:#657078}
.product-info .detail-facts dd{margin:0;padding:11px;overflow-wrap:anywhere;min-height:43px;color:var(--ink)}
.product-info .purchase-box{border-top:0;padding-top:20px}
.product-info .detail-trade-row{display:flex;align-items:flex-end;justify-content:space-between;flex-wrap:wrap;gap:14px}
.product-info .preview-payment-options{border:0;margin:0;padding:0;min-width:0;flex:1 1 230px}
.product-info .preview-payment-options legend{padding:0;margin:0 0 8px;font-size:12px;color:var(--muted)}
.product-info .payment-options{display:flex;gap:8px;flex-wrap:wrap}
.product-info .payment-options label{display:flex;align-items:center;gap:7px;border:1px solid var(--line);padding:10px;min-height:44px;cursor:pointer;font-size:12px;white-space:nowrap;flex:1}
.product-info .payment-options label:hover{border-color:var(--navy)}
.product-info .payment-options label:has(input:checked){border-color:var(--navy);background:#f1f3f2;box-shadow:inset 0 0 0 1px var(--navy)}
.product-info .payment-options label:focus-within{outline:2px solid var(--gold);outline-offset:2px}
.product-info .payment-options input{accent-color:var(--navy);width:15px;height:15px;margin:0;flex-shrink:0}
.product-info .detail-trade-row>.button{min-height:44px;padding:10px 22px;white-space:nowrap}
.product-info .consult-description{margin:0;font-size:12px;color:var(--muted);align-self:center}
@media(max-width:600px){.product-info .detail-facts{grid-template-columns:repeat(2,minmax(0,1fr))}.product-info .detail-facts>div:nth-child(2){border-right:0}.product-info .detail-facts>div:nth-child(-n+2){border-bottom:1px solid var(--line)}.product-info .detail-trade-row{display:block}.product-info .detail-trade-row>.button{width:100%;margin-top:12px}.product-info .payment-options label{justify-content:center}.product-info .detail-facts dt,.product-info .detail-facts dd{padding:9px 11px}}