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.bs{--bs-w:128px;--bs-h:178px;--bs-d:32px;--bs-plank:#3b2a62;--bs-plank-top:#56408a}.bs-offer-row{grid-template-columns:minmax(0,560px);justify-content:center;gap:14px;margin:0;padding:0;list-style:none;display:grid}.bs-offer{background:var(--vx-paper);border:1px solid var(--vx-hairline);box-shadow:var(--vx-shadow);border-radius:20px;align-items:center;gap:16px;padding:18px 20px;display:flex;position:relative;overflow:hidden}.bs-offer:before{content:"";background:var(--bs-accent,var(--vx-brand));width:4px;position:absolute;inset:0 auto 0 0}.bs-offer-student{--bs-accent:#6841b8;--bs-soft:#efe8fb}.bs-offer-book{--bs-accent:#c8962c;--bs-soft:#fbf1d9}.bs-offer-bundle{--bs-accent:#1f9d74;--bs-soft:#e2f4ec}.bs-offer-n{background:var(--bs-soft);width:74px;height:74px;color:var(--bs-accent);border-radius:18px;flex:none;place-items:center;line-height:1;display:grid}.bs-offer-n b{letter-spacing:-.02em;font-size:1.55rem;font-weight:900}.bs-offer-n small{margin-top:-10px;font-size:.72rem;font-weight:800}.bs-offer-copy{gap:4px;min-width:0;display:grid}.bs-offer-copy b{color:var(--vx-ink);flex-wrap:wrap;align-items:center;gap:6px;font-size:1.02rem;display:flex}.bs-offer-copy b i{background:var(--bs-accent);color:#fff;border-radius:99px;padding:2px 8px;font-size:.7rem;font-style:normal}.bs-offer-copy small{color:var(--vx-body);font-size:.86rem;line-height:1.55}.bs-offer.is-yours{border-color:var(--bs-accent);box-shadow:0 0 0 3px var(--bs-soft), var(--vx-shadow-lift)}.bs-offer-foot{color:var(--vx-quiet);margin:14px 2px 0;font-size:.86rem;line-height:1.7}.bs-offer-foot a{color:var(--vx-brand);font-weight:700}.bs-shelf{margin-top:clamp(44px,6vw,72px)}.bs-shelf-head{grid-template-columns:minmax(0,1fr) minmax(0,1.2fr);align-items:end;gap:6px 32px;margin-bottom:8px;display:grid}.bs-shelf-head p{letter-spacing:.08em;color:var(--vx-brand);grid-column:1;margin:0;font-size:.78rem;font-weight:800}.bs-shelf-head h3{color:var(--vx-ink);letter-spacing:-.01em;grid-column:1;margin:0;font-size:clamp(1.35rem,2.4vw,1.8rem)}.bs-shelf-head span{color:var(--vx-body);grid-area:1/2/span 2;font-size:.93rem;line-height:1.7}.bs-row{grid-template-columns:repeat(var(--n), minmax(0, 1fr));margin:0;padding:0;list-style:none;display:grid}.bs-shelf-exams .bs-row,.bs-shelf-topik .bs-row{max-width:780px;margin-inline:auto}.bs-shelf-topik .bs-row{max-width:780px}.bs-item{flex-direction:column;min-width:0;display:flex}.bs-stand{padding:34px 8px 20px;display:block;position:relative}.bs-stand:before{content:"";background:linear-gradient(180deg, var(--bs-plank-top) 0 5px, var(--bs-plank) 5px 100%);height:20px;position:absolute;bottom:0;left:0;right:0;box-shadow:0 16px 24px -14px #1c12348c}.bs-item:first-child .bs-stand:before{border-top-left-radius:4px;border-bottom-left-radius:6px}.bs-item:last-child .bs-stand:before{border-top-right-radius:4px;border-bottom-right-radius:6px}.bs-stand:after{content:"";width:calc(var(--bs-w) * .95);background:radial-gradient(closest-side,#140c2873,#0000);border-radius:50%;height:14px;transition:transform .5s,opacity .5s;position:absolute;bottom:17px;left:50%;transform:translate(-50%)}.bs-item:hover .bs-stand:after,.bs-item:focus-within .bs-stand:after{opacity:.6;transform:translate(-50%)scale(.8)}.bs-book{z-index:1;width:var(--bs-w);height:var(--bs-h);perspective:1100px;margin:0 auto;position:relative}.bs-3d{width:100%;height:100%;transform-style:preserve-3d;transition:transform .65s cubic-bezier(.2,.8,.2,1);position:relative;transform:rotateY(34deg)rotateX(4deg)}.bs-item:hover .bs-3d,.bs-item:focus-within .bs-3d{transform:rotateY(6deg)rotateX(2deg)translate3d(0,-14px,24px)}.bs-face{backface-visibility:hidden;position:absolute}.bs-cover{color:#fff;transform:translateZ(calc(var(--bs-d) / 2));background:linear-gradient(155deg, var(--c1) 0%, var(--c2) 100%);border-radius:2px 7px 7px 2px;flex-direction:column;padding:14px 12px 12px 16px;display:flex;inset:0;overflow:hidden;box-shadow:inset 4px 0 #0000002e,inset 7px 0 6px -4px #ffffff40}.bs-cover:before{content:"";pointer-events:none;background:radial-gradient(120% 60% at 90% 0,#ffffff47,#0000 55%),repeating-linear-gradient(135deg,#ffffff0d 0 2px,#0000 2px 9px);position:absolute;inset:0}.bs-cover:after{content:"";pointer-events:none;opacity:0;background:linear-gradient(90deg,#0000,#ffffff73,#0000);width:40%;transition:left .9s,opacity .3s;position:absolute;inset:-40% auto -40% -60%;transform:rotate(18deg)}.bs-item:hover .bs-cover:after,.bs-item:focus-within .bs-cover:after{opacity:1;left:130%}.bs-cover>span{position:relative}.bs-cover-top{letter-spacing:.14em;justify-content:space-between;align-items:center;font-size:.6rem;display:flex}.bs-cover-top b{font-weight:900}.bs-cover-top i{opacity:.75;font-style:normal}.bs-cover-mark{letter-spacing:-.04em;color:var(--mark,#fff);text-shadow:0 6px 16px #00000038;margin-top:auto;font-size:3.2rem;font-weight:900;line-height:.95}.bs-shelf-exams .bs-cover-mark{letter-spacing:0;font-size:2.05rem}.bs-cover-series{opacity:.82;margin-top:10px;font-size:.58rem;font-weight:700}.bs-cover-title{font-size:.95rem;font-weight:900}.bs-cover-band{background:var(--band,#f2d887);border-radius:2px;width:46%;height:4px;margin-top:10px}.bs-spine{top:0;left:calc((var(--bs-w) - var(--bs-d)) / 2);width:var(--bs-d);height:100%;transform:rotateY(-90deg) translateZ(calc(var(--bs-w) / 2));background:linear-gradient(90deg, var(--c2), var(--c1) 45%, var(--c2));place-items:center;display:grid;overflow:hidden}.bs-spine span{writing-mode:vertical-rl;letter-spacing:.06em;color:#ffffffd9;white-space:nowrap;font-size:.56rem;font-weight:800}.bs-pages{top:3px;left:calc((var(--bs-w) - var(--bs-d)) / 2);width:calc(var(--bs-d) - 2px);height:calc(100% - 6px);transform:rotateY(90deg) translateZ(calc(var(--bs-w) / 2 - 3px));background:repeating-linear-gradient(90deg,#fbf7ee 0 2px,#e8e1d1 2px 3px)}.bs-top{left:0;top:calc((var(--bs-h) - var(--bs-d)) / 2);width:calc(100% - 3px);height:var(--bs-d);transform:rotateX(90deg) translateZ(calc(var(--bs-h) / 2));background:repeating-linear-gradient(0deg,#fbf7ee 0 2px,#e3dccb 2px 3px)}.bs-back{transform:rotateY(180deg) translateZ(calc(var(--bs-d) / 2));background:var(--c2);border-radius:7px 2px 2px 7px;inset:0}.bs-tone-violet{--c1:#8a5fe0;--c2:#4b2a99}.bs-tone-teal{--c1:#2bb3a2;--c2:#0d6258}.bs-tone-coral{--c1:#f08a6c;--c2:#b2432f}.bs-tone-blue{--c1:#5b8ef0;--c2:#22418f}.bs-tone-amber{--c1:#f1bd4f;--c2:#a36b14;--band:#fff}.bs-tone-ink{--c1:#473477;--c2:#1b1233;--mark:#f2d887}.bs-tone-sand{--c1:#d9b37a;--c2:#8f6630;--band:#fff}.bs-tone-rose{--c1:#e17a9a;--c2:#9b3456}.bs-tone-emerald{--c1:#35b27d;--c2:#0f6a47}.bs-tone-red{--c1:#ec6070;--c2:#a1232f}.bs-tone-navy{--c1:#4a5fc4;--c2:#1b2566}.bs-card{background:var(--vx-paper);border:1px solid var(--vx-hairline);box-shadow:var(--vx-shadow);border-radius:18px;flex-direction:column;flex:1;margin:14px 6px 0;padding:16px 16px 14px;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s,border-color .35s;display:flex}.bs-item:hover .bs-card,.bs-item:focus-within .bs-card{box-shadow:var(--vx-shadow-lift);border-color:#dcd2ee;transform:translateY(-4px)}.bs-card-kicker{letter-spacing:.06em;color:var(--vx-quiet);margin:0;font-size:.68rem;font-weight:800}.bs-card h4{color:var(--vx-ink);margin:4px 0 0;font-size:1.08rem;line-height:1.3}.bs-card-bn{color:var(--vx-body);margin:2px 0 0;font-size:.82rem;line-height:1.5}.bs-price{border-top:1px dashed var(--vx-hairline);flex-wrap:wrap;align-items:baseline;gap:2px 8px;margin-top:12px;padding-top:12px;display:flex}.bs-price strong{color:var(--vx-ink);letter-spacing:-.01em;font-size:1.35rem;font-weight:900}.bs-price del{color:var(--vx-quiet);font-size:.85rem}.bs-price em{color:#1f9d74;flex-basis:100%;font-size:.72rem;font-style:normal;font-weight:800}.bs-offers{gap:3px;margin:8px 0 0;display:grid}.bs-offers div{justify-content:space-between;gap:8px;font-size:.74rem;display:flex}.bs-offers dt{color:var(--vx-quiet)}.bs-offers dd{color:var(--vx-brand);margin:0;font-weight:800}.bs-offers div+div dd{color:#a8781c}.bs-actions{gap:6px;margin-top:auto;padding-top:14px;display:grid}.bs-buy{color:#fff;background:var(--vx-brand);border-radius:999px;justify-content:center;align-items:center;gap:6px;min-height:40px;padding:8px 14px;font-size:.88rem;font-weight:800;text-decoration:none;transition:background .2s,transform .2s;display:inline-flex;box-shadow:0 8px 18px -10px #6841b8e6}.bs-buy:hover{background:var(--vx-brand-press);transform:translateY(-1px)}.bs-peek{text-align:center;color:var(--vx-brand);padding:4px;font-size:.8rem;font-weight:700;text-decoration:none}.bs-peek:hover{text-decoration:underline}.bs-buy:focus-visible,.bs-peek:focus-visible,.bs-offer-foot a:focus-visible{outline:2px solid var(--vx-brand);outline-offset:3px}.bs-boxset{color:#efe9fa;background:radial-gradient(70% 140% at 100% 0,#f2d88738,#0000 60%),linear-gradient(135deg,#2c2140,#1b1430);border-radius:22px;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:18px 28px;margin-top:22px;padding:20px 26px;display:grid;position:relative;overflow:hidden;box-shadow:0 24px 50px -28px #1c1234cc}.bs-boxset-stack{width:92px;height:70px;position:relative}.bs-boxset-stack i{left:calc(var(--i) * 14px);width:18px;height:calc(52px + var(--i) * 3px);background:linear-gradient(90deg, #0000002e, transparent 40%), hsl(calc(262 + var(--i) * 34) 58% 60%);transform:rotate(calc(var(--i) * 1deg - 2deg));transform-origin:bottom;border-radius:3px 3px 1px 1px;position:absolute;bottom:0;box-shadow:inset 0 6px #ffffff40}.bs-boxset-stack:after{content:"";background:#56408a;border-radius:3px;height:6px;position:absolute;bottom:-6px;left:-6px;right:-6px}.bs-boxset-tag{color:#2c2140;background:#f2d887;border-radius:99px;padding:3px 10px;font-size:.72rem;font-weight:800;display:inline-block}.bs-boxset h4{color:#fff;margin:8px 0 2px;font-size:1.2rem}.bs-boxset p{color:#cfc6e2;margin:0;font-size:.88rem}.bs-boxset-buy{justify-items:end;gap:2px;display:grid}.bs-boxset-buy del{color:#a99bc8;font-size:.85rem}.bs-boxset-buy strong{color:#fff;font-size:1.6rem;font-weight:900}.bs-buy-gold{color:#2c2140;background:#f2d887;margin-top:6px;box-shadow:0 10px 22px -12px #f2d887e6}.bs-buy-gold:hover{background:#f7e6b6}.bs-boxset .bs-buy:focus-visible{outline-color:#f2d887}.vx-live:not(.vx-still) .bs-row[data-reveal] .bs-book{opacity:0;transition:opacity .7s,transform .9s 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.bs-stand:before{border-top-right-radius:4px;border-bottom-right-radius:6px}.bs-shelf-levels .bs-item:nth-child(4) .bs-stand:before{border-top-left-radius:4px;border-bottom-left-radius:6px}.bs-shelf-levels .bs-item:nth-child(n+4){margin-top:18px}}@media (max-width:860px){.bs-offer-row,.bs-shelf-head{grid-template-columns:1fr}.bs-shelf-head span{grid-area:auto/1}.bs-boxset{grid-template-columns:auto minmax(0,1fr)}.bs-boxset-buy{grid-column:1/-1;grid-template-columns:auto auto 1fr;place-items:baseline start;gap:4px 12px}.bs-boxset-buy .bs-buy{justify-self:end;margin-top:0}}@media (max-width:620px){.bs{--bs-w:112px;--bs-h:156px;--bs-d:26px}.bs-offer{text-align:center;border-radius:16px;flex-direction:column;align-items:center;gap:8px;padding:14px 8px 12px}.bs-offer:before{width:auto;height:3px;inset:0 0 auto}.bs-offer-n{border-radius:14px;width:58px;height:58px}.bs-offer-n b{font-size:1.2rem}.bs-offer-copy b{justify-content:center;font-size:.85rem}.bs-offer-copy small{display:none}.bs-row,.bs-shelf-levels .bs-row,.bs-shelf-exams .bs-row,.bs-shelf-topik .bs-row{max-width:none;margin-inline:calc(-1 * var(--vx-gutter));padding:0 var(--vx-gutter) 10px;overscroll-behavior-x:contain;scroll-snap-type:x mandatory;scroll-padding-inline:var(--vx-gutter);scrollbar-width:none;display:flex;overflow-x:auto}.bs-row::-webkit-scrollbar{display:none}.bs-item,.bs-shelf-levels .bs-item:nth-child(n+3),.bs-shelf-exams .bs-item:nth-child(n+3){scroll-snap-align:start;flex:0 0 68%;margin-top:0}.bs-shelf-topik .bs-item{flex-basis:76%}.bs-item .bs-stand:before{border-radius:0!important}.bs-item:first-child .bs-stand:before{border-radius:4px 0 0 6px!important}.bs-item:last-child .bs-stand:before{border-radius:0 4px 6px 0!important}.bs-shelf-head:after{content:"সরিয়ে দেখুন  ←  →";color:var(--vx-quiet);margin-top:4px;font-size:.76rem;font-weight:700}.bs-cover-mark{font-size:2.7rem}.bs-shelf-exams .bs-cover-mark{font-size:1.7rem}.bs-card{margin:12px 5px 0;padding:14px 14px 12px}.bs-price strong{font-size:1.2rem}.bs-boxset{grid-template-columns:1fr;padding:20px}.bs-boxset-buy{grid-template-columns:auto 1fr}.bs-boxset-buy .bs-buy{grid-column:1/-1;justify-self:stretch}}@media (prefers-reduced-motion:reduce){.bs-3d,.bs-card,.bs-cover:after,.bs-stand:after,.bs-buy{transition:none}.bs-item:hover .bs-3d,.bs-item:focus-within .bs-3d{transform:rotateY(34deg)rotateX(4deg)}}
.vx-flow{counter-reset:flow;grid-template-columns:repeat(3,minmax(0,1fr));gap:clamp(14px,2vw,24px);margin:0;padding:0;list-style:none;display:grid;position:relative}.vx-flow:before{content:"";z-index:0;background:repeating-linear-gradient(90deg,#cdbdf0 0 10px,#0000 10px 18px);height:2px;position:absolute;top:118px;left:16%;right:16%}.vx-flow-step{z-index:1;border-radius:var(--vx-r-card);background:var(--vx-paper);border:1px solid var(--vx-hairline);box-shadow:var(--vx-shadow);flex-direction:column;align-items:flex-start;padding:26px clamp(20px,2.4vw,30px) 24px;transition:transform .35s cubic-bezier(.2,.8,.2,1),box-shadow .35s;display:flex;position:relative}.vx-flow-step:hover{transform:translateY(-6px);box-shadow:0 6px 14px #16131f0f,0 28px 60px -20px #6841b859}.vx-flow-art{background:var(--flow-bg);border-radius:18px;align-self:stretch;place-items:center;height:150px;margin:-8px -8px 18px;display:grid;overflow:hidden}.vx-flow-art .vx-art{width:auto;max-width:70%;height:118px}.vx-flow-1{--flow-bg:var(--vx-sand);--flow-n:var(--vx-gold)}.vx-flow-2{--flow-bg:var(--vx-mint);--flow-n:#b6e3c2}.vx-flow-3{--flow-bg:var(--vx-peri);--flow-n:#b9c1f3}.vx-flow-n{width:46px;height:46px;color:var(--vx-ink);background:var(--flow-n);border:4px solid var(--vx-paper);border-radius:14px;place-items:center;font-size:1.2rem;font-weight:900;display:grid;position:absolute;top:146px;right:22px;box-shadow:0 8px 18px -8px #16131f59}.vx-flow-step h3{margin:0 0 6px;font-size:clamp(1.2rem,1.9vw,1.45rem)}.vx-flow-step p{color:var(--vx-body);margin:0 0 16px;font-size:.95rem;line-height:1.7}.vx-flow-step .vx-more{margin-top:auto}.vx-benefits{grid-template-columns:repeat(4,minmax(0,1fr));gap:clamp(12px,1.6vw,18px)}.vx-benefit{padding:22px 22px 20px}.vx-benefit .vx-art{background:var(--vx-canvas);border-radius:22px;width:84px;height:84px;margin:0 0 18px;padding:10px}.vx-benefit:first-child .vx-art{background:var(--vx-peri)}.vx-benefit:nth-child(2) .vx-art{background:var(--vx-blush)}.vx-benefit:nth-child(3) .vx-art{background:var(--vx-sand)}.vx-benefit:nth-child(4) .vx-art{background:var(--vx-mint)}.vx-benefit h3{margin-bottom:8px;font-size:clamp(1.1rem,1.6vw,1.3rem)}.vx-benefit p{margin-bottom:16px;font-size:.92rem;line-height:1.7}.vx-faq-side{align-content:start;gap:26px;display:grid}.vx-help{border-radius:var(--vx-r-card);color:#e8e1f6;background:radial-gradient(80% 120% at 100% 0,#f2d88738,#0000 60%),linear-gradient(140deg,#3a2a66,#1f1638);padding:24px 24px 22px;position:relative;overflow:hidden}.vx-help-mark{color:#ffffff12;font-size:120px;font-weight:900;line-height:1;position:absolute;top:-18px;right:14px}.vx-help b{color:#fff;font-size:1.15rem;display:block;position:relative}.vx-help p{color:#cfc6e2;margin:6px 0 16px;font-size:.92rem;line-height:1.7;position:relative}.vx-help-btn{color:#2c2140;background:#f2d887;border-radius:999px;align-items:center;gap:6px;min-height:42px;padding:8px 18px;font-size:.9rem;font-weight:800;text-decoration:none;transition:background .2s,transform .2s;display:inline-flex;position:relative}.vx-help-btn:hover{background:#f7e6b6;transform:translateY(-2px)}.vx-help-btn:focus-visible{outline-offset:3px;outline:2px solid #f2d887}@media (max-width:1080px){.vx-benefits{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:860px){.vx-flow{grid-template-columns:1fr}.vx-flow:before{background:repeating-linear-gradient(#cdbdf0 0 10px,#0000 10px 18px);width:2px;height:auto;inset:40px auto 40px 38px}.vx-flow-step{grid-template-columns:104px minmax(0,1fr);align-items:start;column-gap:18px;padding:16px;display:grid}.vx-flow-art{grid-row:1/span 4;height:104px;margin:0}.vx-flow-art .vx-art{height:78px}.vx-flow-n{border-width:3px;width:38px;height:38px;font-size:1rem;top:84px;left:82px;right:auto}.vx-flow-step p{margin-bottom:10px}.vx-flow-step .vx-more{justify-self:start}}@media (max-width:560px){.vx-benefits{grid-template-columns:1fr}.vx-benefit{grid-template-columns:64px minmax(0,1fr);column-gap:16px;display:grid}.vx-benefit .vx-art{border-radius:18px;grid-row:1/span 3;width:64px;height:64px;padding:8px}.vx-flow-step{grid-template-columns:84px minmax(0,1fr);column-gap:14px}.vx-flow-art{height:84px}.vx-flow-art .vx-art{height:62px}.vx-flow-n{top:66px;left:66px}.vx-flow:before{left:58px}}@media (prefers-reduced-motion:reduce){.vx-flow-step,.vx-help-btn{transition:none}.vx-flow-step:hover{transform:none}}
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in-right{0%{border-color:var(--vx-hairline);color:inherit;background:#fff;transform:scale(.94)}}.vx-live:not(.vx-still) .in-card.is-in .in-timer:before{animation:1s steps(2,end) infinite in-blink}@keyframes in-blink{50%{opacity:.2}}.vx-live:not(.vx-still) .in-card.is-in .in-pairs .is-pick{animation:2.4s ease-in-out infinite in-pick}@keyframes in-pick{0%,to{box-shadow:0 0 0 3px #efe8fb}50%{box-shadow:0 0 0 6px #e3d6fb}}.vx-live:not(.vx-still) .in-card.is-in .in-xp{animation:.7s cubic-bezier(.3,1.6,.5,1) 1s both in-pop}@keyframes in-pop{0%{opacity:0;transform:scale(.4)}}@media (max-width:1080px){.in-lesson,.in-why{grid-column:1/-1}.in-exam,.in-game{grid-column:span 6}}@media (max-width:760px){.in-bento{grid-template-columns:1fr}.in-lesson,.in-exam,.in-game,.in-why{grid-column:1/-1}.in-lesson{grid-template-columns:1fr}.in-slide{transform:none}.in-card{border-radius:22px;gap:18px}.in-why ul{grid-template-columns:1fr}}@media (prefers-reduced-motion:reduce){.in-card,.in-link span{transition:none}.in-card:hover{transform:none}}.vx-live:not(.vx-still) .in-card.is-in:hover{transform:translateY(-4px)}