.bk-page{padding-bottom:64px}.bk-hero{isolation:isolate;color:#fff;background:radial-gradient(45% 80% at 82% 20%,#ffc47838,#0000 60%),repeating-linear-gradient(115deg,#ffffff09 0 2px,#0000 2px 46px),linear-gradient(115deg,#5f0c0c 0%,#8a1414 38%,#b31f1f 72%,#c9392a 100%);margin-top:-24px;position:relative;overflow:hidden}.bk-hero-inner{grid-template-columns:minmax(0,1fr) minmax(0,1fr);align-items:center;gap:24px;padding-block:56px 40px;display:grid}.bk-hero-kicker{color:var(--gold-light);letter-spacing:.04em;text-transform:uppercase;background:#ffffff1f;border:1px solid #ffffff40;border-radius:999px;align-items:center;gap:8px;padding:6px 14px;font-size:13px;font-weight:800;display:inline-flex}.bk-hero-kicker .icon{width:16px;height:16px}.bk-hero h1{color:#fff;text-transform:uppercase;margin:16px 0 0;font-size:clamp(22px,2.2vw,28px);font-weight:800;line-height:1.2}.bk-hero h1 span{background:linear-gradient(180deg, #fff6d5 0%, var(--gold-light) 40%, var(--gold) 100%);color:#0000;letter-spacing:-.01em;filter:drop-shadow(0 3px #5008088c);text-wrap:balance;-webkit-background-clip:text;background-clip:text;margin-top:4px;font-size:clamp(32px,3.8vw,52px);font-weight:900;line-height:1.05;display:block}.bk-hero-desc{color:#ffffffdb;max-width:520px;margin:14px 0 0;font-size:16px;line-height:1.65}.bk-hero-points{gap:10px;margin:20px 0 0;padding:0;list-style:none;display:grid}.bk-hero-points li{align-items:center;gap:10px;font-size:14.5px;font-weight:600;display:flex}.bk-hero-points .icon{background:linear-gradient(180deg, #fde68a, var(--gold));width:22px;height:22px;color:var(--red-deep);stroke-width:3px;border-radius:50%;flex:none;padding:4px}.bk-hero-actions{flex-wrap:wrap;gap:12px;margin-top:26px;display:flex}.bk-hero .cat-btn--primary{border-color:var(--gold-light);box-shadow:0 10px 24px #00000040}.bk-hero .bmc-hero-books{min-height:360px}.bk-hero .bmc-hero-books-stage{height:340px}.bk-catalog{margin-top:48px}.bk-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:24px;margin:0;padding:0;list-style:none;display:grid}.bk-grid>li{display:flex}.bk-card{background:#fff;border:1px solid #eef0f3;border-radius:20px;flex-direction:column;flex:1;scroll-margin-top:100px;transition:transform .25s,box-shadow .25s;display:flex;position:relative;overflow:hidden;box-shadow:0 8px 24px #01193d0f}.bk-card:hover{transform:translateY(-6px);box-shadow:0 20px 40px #01193d1f}.bk-card:target{box-shadow:0 0 0 3px var(--gold-light), 0 20px 40px #01193d1f}.bk-card.theme-toan{--bk-tint:linear-gradient(135deg, #eef4ff, #d6e4fd)}.bk-card.theme-vatly{--bk-tint:linear-gradient(135deg, #f3f4f6, #dfe3e8)}.bk-card.theme-hoahoc{--bk-tint:linear-gradient(135deg, #fdf2f2, #fbdcdc)}.bk-card.theme-sinhhoc{--bk-tint:linear-gradient(135deg, #effbf1, #d3f1da)}.bk-cover{background:var(--bk-tint,#f5f6f8);border-radius:14px;place-items:center;height:290px;margin:10px 10px 0;display:grid}.bk-book{aspect-ratio:800/1132;border-radius:3px 8px 8px 3px;width:172px;transition:transform .3s;position:relative;overflow:hidden;transform:perspective(700px)rotateY(-14deg);box-shadow:14px 18px 28px #01193d40,0 2px 6px #01193d1f}.bk-card:hover .bk-book{transform:perspective(700px)rotateY(-4deg)translateY(-4px)}.bk-book img{object-fit:cover;width:100%;height:100%;display:block}.bk-book:after{content:"";pointer-events:none;background:linear-gradient(90deg,#0000004d 0,#ffffff38 3px,#0000001a 8px,#0000 14px),linear-gradient(115deg,#fff3 0%,#0000 35%);position:absolute;inset:0}.bk-body{flex-direction:column;flex:1;padding:18px 18px 20px;display:flex}.bk-tags{flex-wrap:wrap;gap:6px;display:flex}.bk-subject,.bk-exam{letter-spacing:.02em;border-radius:999px;align-items:center;min-height:24px;padding:0 10px;font-size:11.5px;font-weight:800;display:inline-flex}.bk-subject{background:var(--red-soft);color:var(--red)}.bk-exam{background:var(--gold-soft);color:var(--gold-dark)}.bk-card h3{color:var(--navy);margin:12px 0 0;font-size:17px;font-weight:800;line-height:1.35}.bk-desc{color:#5b6474;margin:8px 0 0;font-size:14px;line-height:1.6}.bk-features{gap:6px;margin:12px 0 18px;padding:0;list-style:none;display:grid}.bk-features li{color:#334155;gap:8px;font-size:13.5px;line-height:1.45;display:flex}.bk-features .icon{width:16px;height:16px;color:var(--teal);stroke-width:2.5px;flex:none;margin-top:2px}.bk-actions{gap:10px;margin-top:auto;display:grid}.bk-actions .cat-btn{width:100%}@media (max-width:1180px){.bk-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (max-width:1100px){.bk-hero-inner{grid-template-columns:minmax(0,1fr);padding-block:40px 24px}}@media (max-width:820px){.bk-hero{margin-top:-16px}}@media (max-width:640px){.bk-hero-inner{padding-block:32px 16px}.bk-hero-actions{grid-template-columns:minmax(0,1fr);display:grid}.bk-hero .bmc-hero-books{min-height:0}.bk-grid{grid-template-columns:minmax(0,1fr)}.bk-cover{height:260px}.bk-book{width:150px}}@media (prefers-reduced-motion:reduce){.bk-card,.bk-book{transition:none}}