:root{--pdp-ink:#171d27;--pdp-muted:#737b88;--pdp-line:#e8ebef;--pdp-blue:#2864ef;--pdp-header:72px;--pdp-tabs:62px}
html{scroll-behavior:auto}body.pdp{background:#f7f8fa;color:var(--pdp-ink);padding-bottom:0;font-family:BlogSans,sans-serif}.pdp button,.pdp a{touch-action:manipulation}.pdp button{font:inherit}.pdp a{color:inherit;text-decoration:none}.pdp button:disabled{cursor:default}.skip-link{position:fixed;top:-100px;left:15px;z-index:100;background:#fff;padding:15px}.skip-link:focus{top:10px}
.site-head{height:var(--pdp-header);background:#101722;color:#fff;border-bottom:1px solid #ffffff15}.head-inner{max-width:1200px;margin:auto;height:100%;padding:0 24px;display:flex;gap:40px;align-items:center}.brand{font-family:Georgia,serif;font-weight:700;letter-spacing:-1.2px;font-size:30px;display:flex;align-items:center;gap:15px}.brand span{font-family:BlogSans,sans-serif;font-size:11px;letter-spacing:0;color:#a3b5ca;font-weight:500}.head-inner nav{display:flex;gap:24px;margin-left:auto;font-size:14px;color:#c7d0db}.head-inner .icon-button{border-color:#ffffff40;color:#fff;background:#ffffff08;width:38px;height:38px}.icon-button{display:grid;place-items:center;width:48px;height:48px;background:#fff;border:1px solid var(--pdp-line);border-radius:7px;color:#505c70;font-size:24px!important;cursor:pointer}
.overview{background:#101722;color:#f4f7fc;padding:28px 24px 42px}.overview-inner{max-width:1168px;margin:auto}.tags{font-size:12px;color:#96b9f1;margin:0 0 14px;letter-spacing:.02em}.pdp .overview h1{font-size:26px;line-height:1.5;letter-spacing:-.04em;margin:0 0 15px;font-weight:700}.publisher{font-size:13px;color:#c2ccda;display:flex;align-items:center;gap:8px;margin:0 0 24px}.publisher-mark{width:22px;height:22px;border-radius:50%;display:inline-grid;place-items:center;background:#2864ef;color:#fff;font:bold 17px Georgia,serif}.format-label{color:#a7b7cf;font-size:11px;border:1px solid #465266;border-radius:3px;padding:2px 6px;margin-left:5px}
.preview-grid{display:grid;grid-template-columns:minmax(0,2.05fr) minmax(280px,1fr);gap:30px}.preview-stage{position:relative;min-height:410px;aspect-ratio:16/9;border-radius:10px;background:radial-gradient(ellipse at 80% 50%,#1b4982,transparent 70%),#0b1c35;overflow:hidden;isolation:isolate}.preview-caption{position:absolute;left:6%;top:15%;z-index:2;width:53%}.preview-caption>p:first-child{font-size:12px;color:#93c8ff;margin:0 0 20px}.pdp .preview-caption h2{font-size:clamp(25px,3vw,39px);font-weight:900;line-height:1.3;margin:0 0 20px;letter-spacing:-.05em}.preview-caption>p:last-child{font-size:14px;color:#d1e1f6;line-height:1.7;margin:0}.preview-stage>img{position:absolute;width:63%;height:100%;object-fit:contain;right:-7%;top:3%;z-index:1;filter:drop-shadow(0 20px 35px #0003)}.preview-stage.gif-preview>img{width:105%;height:67%;top:27%;right:-2.5%;opacity:.7;mask-image:linear-gradient(transparent,#000 20%,#000 85%,transparent)}.gif-preview .preview-caption{top:9%;width:90%}.gif-preview .preview-caption h2{font-size:30px;margin-bottom:10px}.gif-preview .preview-caption>p:first-child{margin-bottom:12px}.preview-bottom{position:absolute;inset:auto 5% 5%;display:flex;justify-content:space-between;align-items:center;font-size:11px;color:#9ab5da;z-index:3;gap:12px}.preview-bottom span:nth-child(2){margin-left:auto}.preview-bottom button{background:#122841;border:1px solid #93c8ff55;color:#d9eaff;border-radius:50%;width:28px;height:28px;cursor:pointer}
.preview-menu{padding:8px 0}.pdp .preview-menu h2{font-size:18px;margin:0 0 7px;font-weight:700;line-height:1.5;letter-spacing:-.035em}.menu-sub{font-size:12px;color:#90a0b8;margin:0 0 19px}.preview-list{display:grid;gap:4px}.preview-list button{display:flex;gap:13px;align-items:center;text-align:left;border:0;background:transparent;color:#c7d1df;padding:17px 13px;border-radius:6px;cursor:pointer;width:100%;min-height:66px}.preview-list button[aria-pressed=true]{background:#26364e;color:#fff;box-shadow:inset 3px 0 #71adff}.preview-list button>span{font-size:11px;color:#7b96bd;align-self:flex-start;padding-top:3px}.preview-list strong{display:block;font-size:14px;font-weight:600;line-height:1.4}.preview-list small{display:block;font-size:11px;color:#8c9eb8;margin-top:5px}.preview-list i{font-style:normal;color:#9cc5ff;margin-left:auto}.preview-cta{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #ffffff18;margin-top:18px;padding:18px 14px;color:#9bc7ff!important;font-size:13px;font-weight:700}
.product-layout{max-width:1168px;display:grid;grid-template-columns:minmax(0,740px) minmax(0,350px);gap:32px;align-items:start;margin:0 auto;padding:30px 0 60px}.content-column{min-width:0}.section-tabs{display:flex;background:#fff;border-bottom:1px solid var(--pdp-line);position:sticky;top:0;z-index:10;min-height:var(--pdp-tabs);align-items:stretch}.section-tabs a{padding:21px 17px;font-size:14px;color:#78808c;white-space:nowrap;position:relative;font-weight:500}.section-tabs a.active{color:var(--pdp-ink);font-weight:700}.section-tabs a.active:after{content:'';height:3px;background:var(--pdp-blue);position:absolute;bottom:0;left:15px;right:15px}.intro-section,.white-section{scroll-margin-top:78px}.section-head{padding:40px 26px 32px;background:#fff}.section-eyebrow{font-size:10px;letter-spacing:1.6px;color:#697d9f;font-weight:700;margin:0 0 15px}.pdp .section-head h2{font-size:25px;font-weight:700;line-height:1.5;letter-spacing:-.04em;margin:0 0 13px}.section-head>p:last-child{font-size:14px;color:#737e8e;line-height:1.7;margin:0}.pdp .detail{max-width:100%;margin:0;overflow:hidden;color:#fff}.pdp .detail .kicker{color:#89c9ff}.pdp .detail h2{margin-top:0}.white-section{margin-top:24px;padding:40px 28px;background:#fff;border-radius:8px}.pdp .white-section>h2{font-size:23px;line-height:1.4;font-weight:700;letter-spacing:-.04em;margin:0 0 15px}.section-description{font-size:14px;color:var(--pdp-muted);line-height:1.7;margin:0 0 26px}
.contents-list details,.faq-list details{border-bottom:1px solid var(--pdp-line);padding:0}.contents-list summary,.faq-list summary{list-style:none;padding:22px 28px 22px 0;font-weight:600;font-size:15px;line-height:1.5;cursor:pointer;position:relative}.contents-list summary::-webkit-details-marker,.faq-list summary::-webkit-details-marker{display:none}.contents-list summary:after,.faq-list summary:after{content:'+';position:absolute;right:2px;font-size:20px;font-weight:400;top:19px;color:#8c97a7}.contents-list details[open] summary:after,.faq-list details[open] summary:after{content:'−'}.contents-list summary span{color:#8796ad;font-size:12px;margin-right:15px}.contents-list ul{padding:0 0 22px 33px;margin:0;list-style:none;color:#697586;font-size:13px;line-height:2.2}.faq-list details p{font-size:14px;line-height:1.8;color:#697586;margin:0;padding:0 15px 23px 0}.purchase-guide dl{margin:25px 0;font-size:14px}.purchase-guide dl>div{display:grid;grid-template-columns:100px 1fr;border-bottom:1px solid var(--pdp-line);padding:16px 0;gap:15px}.purchase-guide dt{color:#8a93a0}.purchase-guide dd{margin:0;font-weight:600}.purchase-guide>p:last-child{font-size:13px;color:#7b8593;line-height:1.8}
.purchase-aside{position:sticky;top:24px;margin-top:16px}.purchase-card{border:1px solid #edf0f4;box-shadow:0 4px 25px #24395806;border-radius:10px;background:#fff;padding:26px}.card-publisher{display:flex;align-items:center;gap:7px;color:#5b687d;font-size:12px;margin:0 0 23px}.book-type{font-size:11px;color:#6382b2}.pdp .purchase-card h2{font-size:23px;line-height:1.4;letter-spacing:-.04em;font-weight:700;margin:10px 0 12px}.card-subtitle{color:#788292;line-height:1.7;font-size:14px;margin:0}.card-price{margin:28px 0 20px}.card-price strong{font-size:22px;line-height:1.4;display:block;letter-spacing:-.04em}.card-price small{display:block;font-size:11px;color:#8c96a5;margin-top:8px;line-height:1.6}.card-actions{display:flex;gap:8px}.buy-button{background:var(--pdp-blue);color:white;border:0;min-height:48px;flex:1;border-radius:7px;font-size:14px!important;font-weight:700!important;cursor:pointer;display:flex;align-items:center;justify-content:center}.buy-button:disabled{background:#e9edf4;color:#8b96a7}.wish[aria-pressed=true]{color:var(--pdp-blue);border-color:#c9d9ff;background:#f3f7ff}.contents-link{font-size:12px;display:flex;justify-content:space-between;padding:20px 0;color:#426aa3!important;font-weight:600}.card-meta{margin:8px 0 0;padding:5px 16px;background:#f8f9fb;border-radius:6px}.card-meta>div{display:grid;grid-template-columns:66px 1fr;gap:12px;padding:17px 0;border-bottom:1px solid #e9edf2;font-size:11px;line-height:1.8}.card-meta>div:last-child{border:0}.card-meta dt{color:#8a94a5}.card-meta dd{color:#5b6677;margin:0}.card-share{width:100%;background:none;border:0;color:#8a94a5;padding:23px 0 0;cursor:pointer;font-size:11px!important}
.site-foot{border-top:1px solid #e5e9ef;max-width:1168px;margin:auto;padding:40px 0 50px;font-size:12px;color:#778394}.site-foot strong{font:bold 25px Georgia,serif;color:#26344a;letter-spacing:-1px}.site-foot p{margin:12px 0 22px}.site-foot small{display:block;margin-top:25px;font-size:10px}.mobile-purchase{display:none}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);max-width:90%;padding:13px 20px;background:#17263bef;color:#fff;border-radius:8px;font-size:13px;z-index:50;box-shadow:0 5px 20px #0002;text-align:center}.toast[hidden]{display:none}
@media(max-width:1200px){.product-layout{margin:0 24px;grid-template-columns:minmax(0,2fr) minmax(290px,.95fr);gap:24px}.site-foot{margin:0 24px}.preview-stage{min-height:360px}}
@media(max-width:900px){.pdp{padding-bottom:88px!important}.head-inner{padding:0 20px;gap:15px}.brand{font-size:25px}.brand span{display:none}.head-inner nav{gap:15px;font-size:12px}.overview{padding:24px 20px 30px}.preview-grid{grid-template-columns:1fr}.preview-stage{min-height:0;aspect-ratio:16/9}.preview-menu{padding:0}.preview-menu h2,.preview-menu .menu-sub{display:none}.preview-list{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.preview-list button{padding:14px 10px}.preview-list button i{display:none}.preview-list strong{font-size:12px}.preview-list small{font-size:10px}.preview-cta{margin-top:12px}.product-layout{display:block;margin:0 auto;padding-top:0;padding-bottom:32px;max-width:740px}.purchase-aside{display:none}.section-tabs{overflow-x:auto;scrollbar-width:none}.section-tabs a{flex:1;text-align:center;padding:20px 13px;font-size:13px}.section-head{padding:32px 23px}.white-section{border-radius:0;margin-top:12px;padding:34px 23px}.pdp .white-section>h2{font-size:22px}.site-foot{margin:0;padding:35px 24px 50px}.mobile-purchase{display:flex;align-items:center;gap:10px;position:fixed;bottom:0;left:0;right:0;z-index:30;background:#fff;border-top:1px solid #e4e8ed;padding:10px 16px max(10px,env(safe-area-inset-bottom));box-shadow:0 -4px 20px #10253f08}.mobile-purchase .icon-button{width:42px;height:46px;flex-shrink:0}.mobile-purchase>div{min-width:0;flex:1}.mobile-purchase small{font-size:10px;color:#8190a4;display:block}.mobile-purchase strong{font-size:13px;display:block;margin-top:3px}.mobile-purchase .buy-button{flex:0 0 130px;min-height:46px;font-size:13px!important}.toast{bottom:92px}}
@media(max-width:480px){:root{--pdp-header:62px}.head-inner{padding:0 16px}.brand{font-size:24px}.head-inner nav a:first-child{display:none}.head-inner nav{font-size:11px;gap:8px}.head-inner .icon-button{width:32px;height:32px;font-size:21px!important}.overview{padding:21px 16px 25px}.tags{font-size:10px;line-height:1.7}.pdp .overview h1{font-size:20px;line-height:1.55;margin-bottom:14px}.publisher{font-size:11px;margin-bottom:20px}.preview-stage{aspect-ratio:1.5}.preview-caption{top:13%;left:6%;width:57%}.pdp .preview-caption h2{font-size:24px;line-height:1.35;margin-bottom:12px}.preview-caption>p:first-child{font-size:10px;margin-bottom:14px}.preview-caption>p:last-child{font-size:11px;line-height:1.7}.preview-stage>img{width:63%;right:-9%;top:3%}.preview-bottom{font-size:9px}.gif-preview .preview-caption h2{font-size:22px}.gif-preview .preview-caption>p:last-child{display:none}.preview-stage.gif-preview>img{height:75%;top:24%}.preview-list button{gap:8px}.preview-list button>span{font-size:9px}.preview-list strong{font-size:11px}.preview-list small{font-size:9px;line-height:1.5}.preview-cta{font-size:12px;padding:16px 10px}.section-tabs a{font-size:11px;padding:19px 9px}.pdp .section-head h2{font-size:22px}.section-head>p:last-child{font-size:12px}.contents-list summary,.faq-list summary{font-size:14px}.contents-list ul{font-size:12px;padding-left:30px}.faq-list details p{font-size:13px}.mobile-purchase{padding-left:12px;padding-right:12px;gap:8px}.mobile-purchase .buy-button{flex-basis:112px}.mobile-purchase strong{font-size:12px}}
.pdp .detail .scene.hero h2{font-size:clamp(28px,8.8cqw,76px)}
.preview-stage:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#0b1c3580,transparent 62%);z-index:1;pointer-events:none}
@media(max-width:360px){.preview-caption{width:63%;top:12%}.pdp .preview-caption h2{font-size:20px;margin-bottom:9px;line-height:1.3}.preview-caption>p:first-child{margin-bottom:10px;font-size:9px}.preview-caption>p:last-child{font-size:10px}.preview-bottom{font-size:8px}.gif-preview .preview-caption h2{font-size:19px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

/* Store detail shell: public preview and private reader remain separate. */
.store-detail{background:#fff;color:#17202c}.store-detail .site-head{height:72px;background:#fff;border-bottom:1px solid #edf0f5}.store-detail .head-inner{max-width:1200px;padding:0 24px;gap:30px}.store-detail .brand{color:#2563eb;font-size:27px;letter-spacing:-1.2px;font-weight:850}.store-detail .head-inner nav{margin:0;display:flex;gap:27px}.store-detail .head-inner nav a{color:#4b5563;font-size:14px;font-weight:650}.store-detail .account-button{margin-left:auto;color:#fff;background:#17202c;border:0;padding:11px 21px;font-size:12px!important;border-radius:7px}.store-main{max-width:1200px;margin:auto;padding:0 24px}.product-topbar{display:flex;align-items:center;justify-content:space-between;padding:26px 0;color:#9299a5;font-size:12px}.product-topbar button{background:none;border:0;color:#7b8798;font-size:22px;cursor:pointer}.store-detail .product-layout{display:grid;grid-template-columns:minmax(0,1fr) 360px;gap:38px;max-width:none;padding:0;margin:0}.store-detail .content-column{min-width:0}.book-hero{height:400px;background:linear-gradient(140deg,#f5f6f9,#fafbfc 50%,#e7eef9);border-radius:14px;display:grid;place-items:center}.store-book{width:213px;aspect-ratio:2/3;position:relative;transform:perspective(1100px) rotateY(-5deg);box-shadow:5px 6px 0 #e6e6e2,10px 10px 0 #2c3038}.store-book img{width:100%;height:100%;display:block;object-fit:cover}.store-book:after{content:'';position:absolute;inset:0;box-shadow:inset 3px 0 6px #0004}.store-detail .purchase-aside{padding:0;align-self:stretch;position:relative}.product-summary{position:sticky;top:95px;padding-bottom:20px;background:#fff}.summary-publisher{color:#2563eb;font-size:13px;margin:0 0 8px}.store-detail h1#product-title{font-size:25px;line-height:1.4;margin:0 0 9px;letter-spacing:-.04em;font-weight:750}.product-summary>p:not(.summary-publisher){font-size:12px;color:#8a95a5;line-height:1.7;margin:0 0 12px}.product-summary>span{font-size:10px;color:#647a9b}.store-detail .purchase-card{position:sticky;top:238px;border:1px solid #edf0f4;border-radius:14px;padding:24px;box-shadow:none;margin:0;background:#fff}.store-detail .card-price{margin:0 0 26px;padding:0;border:0}.store-detail .card-price strong{font-size:28px;color:#17202c;font-weight:750}.store-detail .option-label{font-size:13px;font-weight:700;line-height:1.5;margin:0 0 12px;color:#263347}.purchase-option{border:2px solid #3971db;border-radius:9px;background:#f5f8fe;padding:15px 13px;display:flex;align-items:center;gap:10px}.option-check{border-radius:50%;background:#3971db;color:#fff;width:17px;height:17px;text-align:center;line-height:17px;font-size:10px}.purchase-option strong{font-size:12px;font-weight:700;display:block}.purchase-option small{display:block;color:#8a97aa;font-size:10px;margin-top:5px;line-height:1.6}.price-total{border-top:1px solid #edf0f4;display:flex;align-items:center;justify-content:space-between;padding:18px 0;margin-top:20px;font-size:11px;font-weight:600}.price-total strong{font-size:15px;font-weight:700}.store-detail .card-actions{display:flex;gap:8px;margin:0 0 14px}.store-detail .card-actions .wish{width:48px;height:48px;color:#7a8899;border:1px solid #e6ebf3;font-size:23px!important;border-radius:5px}.store-detail .buy-button{height:48px;border-radius:5px;background:#2563eb;font-size:13px!important;flex:1}.store-detail .buy-button:disabled{background:#edf1f7;color:#8c99ae}.store-detail #price-note{font-size:10px;color:#9aa4b4;line-height:1.8;display:block}.store-detail .contents-link{position:sticky;top:605px;display:flex;justify-content:space-between;color:#7c8eaa;font-size:11px;padding:17px 3px;border:0}.book-at-glance{margin:30px 0 20px;padding:0}.book-at-glance h2,.store-detail .panel-heading{font-size:17px!important;line-height:1.5;letter-spacing:-.03em;margin:0 0 16px!important;font-weight:700!important;color:#263245}.book-at-glance h2:before,.store-detail .panel-heading:before{content:'';display:inline-block;width:3px;height:16px;background:#2563eb;margin-right:9px;vertical-align:-2px;border-radius:3px}.book-at-glance>div{display:flex;gap:10px;flex-wrap:wrap}.book-at-glance>div>span{padding:10px 15px;background:#f6f8fb;color:#73839a;font-size:11px;border-radius:6px}.store-detail .section-tabs{position:sticky;top:72px;display:grid;grid-template-columns:repeat(4,1fr);padding:0;background:#fffffff5;z-index:12;border-bottom:1px solid #e9edf4;backdrop-filter:blur(8px);margin:0 0 28px;gap:0;height:54px}.store-detail .section-tabs a{text-align:center;margin:0;display:grid;place-items:center;font-size:13px;color:#8c94a0;padding:0;white-space:nowrap;border-bottom:2px solid transparent;font-weight:600}.store-detail .section-tabs a.active{color:#2563eb;border-bottom-color:#2563eb}.store-detail .section-head{display:none}.store-detail .intro-section{padding:0;margin:0}.store-detail .white-section{padding:24px 0 35px;border:0;margin:0;background:#fff}.store-detail .intro-section>.white-section{margin-top:35px}.store-detail .white-section>h2{font-size:20px;margin:0 0 15px}.store-detail .section-description{font-size:12px;color:#8995a7}.store-detail .section-eyebrow{font-size:9px;color:#8a9cb8}.store-detail .detail{width:100%;max-width:none;margin:0;border-radius:8px;overflow:hidden}.store-detail .scene{max-width:none}.store-detail .contents-list{border:1px solid #e6edf7;border-radius:8px;overflow:hidden;margin-top:25px}.store-detail .contents-list details{border-bottom:1px solid #e9edf4;margin:0}.store-detail .contents-list details:last-child{border:0}.store-detail .contents-list summary{padding:18px;font-size:13px}.store-detail .contents-list ul{font-size:12px;line-height:2;padding-left:55px;color:#8694aa}.store-detail .faq-list summary{font-size:13px;padding:18px 0}.store-detail .faq-list p{font-size:12px;color:#8290a5}.lesson-reader-layout{margin-top:25px}.store-detail .lecture-menu{background:#f7f9fc;border:1px solid #e7edf5;border-radius:10px;padding:23px;color:#263b5b;margin-bottom:20px}.store-detail .lecture-menu h2{color:#263b5b;font-size:16px}.store-detail .lesson-row{color:#63738d;border-top:1px solid #e8edf5;font-size:12px!important;min-height:57px}.store-detail .lesson-row:hover,.store-detail .lesson-row[aria-pressed=true]{color:#2563eb}.store-detail .lesson-page-count{color:#637b9e}.store-detail .lesson-marker{color:#90a3c0}.store-detail .lesson-access-note{border-color:#e4eaf2;font-size:10px;color:#8794aa;margin:13px 0 0}.store-detail .preview-stage{background:#f5f7fa;aspect-ratio:auto;height:420px;min-height:420px;border:1px solid #e5ecf6;border-radius:10px}.reader-placeholder{height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;color:#a1acc0;padding:20px}.reader-placeholder>span{font-size:36px;color:#b5c4df}.reader-placeholder h3{font-size:15px;color:#8293af;font-weight:600}.reader-placeholder p{font-size:11px;line-height:1.8}.publisher-profile{display:flex;align-items:center;gap:17px;padding:25px;background:#f7f9fc;border-radius:10px}.publisher-profile .publisher-mark{width:48px;height:48px;font-size:30px}.publisher-profile strong{font-size:16px}.publisher-profile p{font-size:11px;color:#8a98ad;margin:8px 0 0}.publishing-info{margin:25px 0}.publishing-info>div{display:grid;grid-template-columns:100px 1fr;border-bottom:1px solid #eaf0f7;padding:17px;font-size:12px}.publishing-info dt{color:#92a0b5}.publishing-info dd{margin:0;color:#586d8c}.empty-reviews{text-align:center;padding:60px 20px;background:#f8fafc;border-radius:10px}.empty-reviews>span{font-size:30px;color:#aebfdc}.empty-reviews h3{font-size:16px;color:#677d9d}.empty-reviews p{font-size:12px;color:#95a2b6}.concept-intro{text-align:center;padding:32px;background:#f6f8fb;border-radius:10px}.concept-intro img{width:240px;max-width:70%;box-shadow:9px 12px 22px #10264a29}.concept-intro h2{font-size:21px!important;margin:25px 0 12px!important}.concept-intro p{font-size:12px;line-height:1.8;color:#8796ac}.store-detail .site-foot{margin-top:65px;background:#141d2b;color:#94a4bc;padding:35px 24px}.store-detail .site-foot>a:first-child{font-size:25px;font-weight:800;color:#fff;letter-spacing:-1px}.store-detail .site-foot p{font-size:11px}.store-detail .site-foot>a{font-size:11px}.store-detail .mobile-purchase{display:none}.tab-panel[hidden]{display:none!important}.store-detail .white-section[hidden]{display:none!important}
@media(max-width:900px){.store-main{padding:0 20px}.store-detail .product-layout{grid-template-columns:minmax(0,1fr) 300px;gap:24px}.book-hero{height:350px}.store-book{width:180px}.store-detail .purchase-card{padding:20px}.store-detail .card-price strong{font-size:24px}}
@media(max-width:700px){.store-detail .site-head{height:65px}.store-detail .head-inner{padding:0 20px;gap:16px}.store-detail .head-inner nav{display:none}.store-detail .brand{font-size:24px}.store-detail .account-button{font-size:11px!important;padding:9px 14px}.store-main{padding:0 18px}.product-topbar{padding:19px 0;font-size:11px}.store-detail .product-layout{display:flex;flex-direction:column;gap:0}.store-detail .content-column{display:contents}.book-hero{order:1;height:290px;border-radius:10px}.store-book{width:157px}.store-detail .purchase-aside{order:2;display:block;position:static;padding:23px 0 22px}.product-summary,.store-detail .purchase-card,.store-detail .contents-link{position:static}.product-summary{padding-bottom:16px}.store-detail h1#product-title{font-size:22px}.product-summary>p:not(.summary-publisher){font-size:11px;margin-bottom:8px}.store-detail .purchase-card{padding:18px;border-radius:10px}.store-detail .card-price{margin-bottom:16px}.store-detail .card-price strong{font-size:23px}.store-detail .price-total{padding:15px 0;margin-top:16px}.store-detail .purchase-aside>.contents-link{display:none}.book-at-glance{order:3;margin:5px 0 19px}.book-at-glance h2{font-size:15px!important}.book-at-glance>div{gap:7px}.book-at-glance>div>span{font-size:9px;padding:9px 10px}.store-detail .section-tabs{order:4;top:65px;margin-bottom:24px;height:50px}.store-detail .section-tabs a{font-size:11px}.store-detail .tab-panel{order:5}.store-detail .intro-section{margin:0}.store-detail .white-section{padding:0 0 25px}.store-detail .panel-heading{font-size:16px!important}.store-detail .mobile-purchase{display:flex;position:fixed;bottom:0;left:0;right:0;background:#fffffff5;backdrop-filter:blur(8px);padding:10px 15px;padding-bottom:max(10px,env(safe-area-inset-bottom));border-top:1px solid #e8edf5;z-index:30;gap:10px;align-items:center}.store-detail .mobile-purchase .wish{width:35px;height:35px;border:0;color:#8798b2;font-size:22px!important}.store-detail .mobile-purchase>div{flex:1;min-width:0}.store-detail .mobile-purchase small{display:block;font-size:9px;white-space:nowrap;text-overflow:ellipsis;overflow:hidden}.store-detail .mobile-purchase strong{font-size:12px;color:#526887}.store-detail .mobile-purchase .buy-button{flex:0 0 100px;height:40px;font-size:11px!important}.store-detail .site-foot{padding-bottom:100px;margin-top:40px}.concept-intro{padding:25px 17px}.concept-intro img{width:185px}.store-detail .lecture-menu{padding:18px}.store-detail .preview-stage{height:420px;min-height:420px}}

body.pdp.store-detail{background:#fff}.store-detail .brand{font-family:BlogSans,sans-serif}.store-detail h1#product-title{position:static;transform:none;text-shadow:none;width:auto;color:#17202c}.store-detail .mobile-purchase .store-title{position:static;transform:none;text-shadow:none;width:auto;color:#7a8aa3}

.store-detail .purchase-aside{top:auto;margin-top:0}.store-detail .purchase-card h2.option-label{font-size:13px;line-height:1.5;margin:0 0 12px;font-weight:700}
@media(max-width:700px){.store-detail .product-layout{align-items:stretch}.store-detail .book-hero{width:100%}.store-detail .tab-panel{width:100%}}

.best-reviews{margin:34px 0 25px}.reviews-heading{display:flex;align-items:center;gap:10px;margin-bottom:10px}.store-detail .reviews-heading h2{font-size:17px;line-height:1.5;font-weight:750;margin:0;letter-spacing:-.03em}.reviews-heading h2:before{content:'';display:inline-block;width:3px;height:17px;background:#2563eb;margin-right:8px;vertical-align:-2px;border-radius:3px}.demo-label{font-size:9px;line-height:1.4;padding:3px 6px;background:#f0f3f9;color:#8190a5;border-radius:4px;font-weight:500;white-space:nowrap}.reviews-demo-note{font-size:10px;color:#9aa6b7;line-height:1.8;margin:0 0 15px}.best-review-list{display:flex;flex-direction:column;gap:11px}.best-review-card{background:#f7f8fb;border-radius:10px;padding:17px 19px}.best-review-card>div{display:flex;align-items:center;gap:8px;font-size:11px;margin-bottom:6px}.best-review-card strong{font-weight:650;color:#4f617c}.best-review-card small{font-size:9px;color:#a1acbd}.review-stars{color:#e6ae13;font-size:15px;letter-spacing:1px;white-space:nowrap}.best-review-card p{font-size:12px;color:#8d99ac;line-height:1.85;margin:8px 0 0}.more-reviews{display:block;text-align:center;margin-top:20px;font-size:12px;color:#7a879a;text-decoration:underline;text-underline-offset:4px}.summary-rating{display:flex;align-items:center;gap:8px;margin-top:13px;font-size:11px;color:#96a0b2}.summary-rating strong{color:#263143;font-size:13px}.summary-rating .review-stars{font-size:17px;letter-spacing:0}.store-detail .purchase-card .card-price strong{font-size:31px}.purchase-option{gap:9px;justify-content:space-between;padding:17px 13px}.option-price{white-space:nowrap;font-size:15px;font-weight:750;color:#223046}.store-detail .price-total strong{font-size:19px}.store-detail .card-actions .wish{height:50px;width:50px}.store-detail .card-actions .buy-button{height:50px}.store-detail .card-actions .wish small{font-size:10px;color:#92a0b5;line-height:1}.store-detail .card-actions .wish{display:flex;flex-direction:column;justify-content:center;gap:2px}.store-detail .buy-button:not(:disabled){background:#2850cf;color:#fff;font-weight:700}.store-detail .card-actions .buy-button:not(:disabled){font-size:13px!important}.store-detail .price-total{padding:21px 0}.product-card[data-book] .catalog-status{font-size:15px!important;font-weight:750!important;color:#1d293a!important}.price-preview-note{font-size:9px;color:#93a1b5;margin-left:6px}
@media(max-width:700px){.best-reviews{order:3;margin:8px 0 24px}.store-detail .reviews-heading h2{font-size:15px}.best-review-card{padding:15px}.best-review-card p{font-size:11px}.store-detail .purchase-card .card-price strong{font-size:27px}.option-price{font-size:13px}.store-detail .price-total strong{font-size:17px}.summary-rating{font-size:10px;gap:6px}.summary-rating .review-stars{font-size:16px}.store-detail .mobile-purchase .buy-button{flex-basis:130px}.store-detail .mobile-purchase strong{font-size:13px}.product-card[data-book] .catalog-status{font-size:12px!important}}

.summary-rating .demo-label,.reviews-heading .demo-label{position:static;transform:none;margin:0}

.store-detail .purchase-sticky{position:sticky;top:90px;max-height:calc(100vh - 108px);overflow-y:auto;overflow-x:hidden;padding-right:6px;scrollbar-width:thin;scrollbar-color:#d7dce4 transparent}.store-detail .purchase-sticky .product-summary,.store-detail .purchase-sticky .purchase-card{position:static}.store-detail .sidebar-contents{padding:23px 0 0;margin-top:23px;margin-bottom:0;background:#fff;border:0;border-top:1px solid #edf0f4;border-radius:0;color:#171b23;display:block}.store-detail .sidebar-contents h2{font-size:16px!important;font-weight:600;color:#171b23;margin:0 0 7px!important;line-height:1.5}.store-detail .sidebar-contents .lesson-total-pages{font-size:11px;color:#9298a3;margin:0 0 13px}.store-detail .sidebar-contents .lesson-list{max-height:280px;padding:0 4px 0 0;overflow-y:auto;scrollbar-width:thin;scrollbar-color:#d6d9df #fff}.store-detail .sidebar-contents .lesson-row{display:grid;grid-template-columns:11px 31px minmax(0,1fr) 52px;gap:8px;min-height:57px;padding:12px 0;border:0;color:#313640;font-size:12px!important;background:#fff;text-align:left;font-weight:500}.store-detail .sidebar-contents .lesson-row:hover,.store-detail .sidebar-contents .lesson-row[aria-pressed=true]{background:#f6f7fa;color:#111}.store-detail .sidebar-contents .lesson-marker{font-size:19px;color:#b0b5be;text-align:center}.store-detail .sidebar-contents .lesson-number{font-size:11px;color:#818996}.store-detail .sidebar-contents .lesson-name{font-weight:500;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;color:inherit}.store-detail .sidebar-contents .lesson-page-count{font-size:11px;white-space:nowrap;color:#171b23;text-align:right}.store-detail .sidebar-contents .lesson-access-note{border:0;margin:14px 0 0;padding:0;font-size:10px;color:#9ba3b0}.store-detail .purchase-sticky .sidebar-contents .lesson-row:focus-visible{outline:2px solid #a7b1c1;outline-offset:-2px}
@media(max-width:700px){.store-detail .purchase-sticky{position:static;max-height:none;overflow:visible;padding:0}.store-detail .sidebar-contents{margin-top:23px;padding-top:20px}.store-detail .sidebar-contents .lesson-row{font-size:12px!important;min-height:56px}.store-detail .sidebar-contents .lesson-list{max-height:280px}}
.header-wishlist{font-size:26px;color:#4b5563;line-height:1;text-decoration:none;display:inline-flex;align-items:center;justify-content:center}.header-wishlist:hover{color:#2563eb}
.site-head .brand-logo{display:block;width:205px;height:60px;object-fit:contain}.site-foot .brand-logo{display:block;width:205px;height:60px;object-fit:contain;filter:brightness(0) invert(1)}@media(max-width:700px){.site-head .brand-logo{width:140px;height:45px}}
.store-detail .section-tabs{position:relative;top:auto;grid-template-columns:repeat(3,minmax(0,1fr));background:#fff;backdrop-filter:none;z-index:1}.store-detail .section-tabs a{min-width:0}.store-detail .section-tabs a.active:after{display:none}
@media(max-width:600px){.store-detail .site-head{height:94px}.store-detail .head-inner{flex-wrap:wrap;align-content:center;gap:0 12px}.store-detail .head-inner .brand{order:1}.store-detail .header-wishlist{order:2;margin-left:auto}.store-detail #account-button{order:3}.store-detail .head-inner nav{order:4;flex-basis:100%;margin-left:0;display:flex;height:27px;justify-content:center;align-items:center;gap:25px;margin-top:3px;font-size:11px}.store-detail .head-inner nav a:first-child{display:inline}.store-detail .site-head .brand-logo{width:145px;height:48px}}