.bk{--bk-navy:#12384f;--bk-ink:#0b1f2c;--bk-text:#2b3f4f;--bk-muted:#4a6073;--bk-line:#e3e9ef;--bk-field:#c9d5df;--bk-orange:#f26522;--bk-orange-ink:#c2410c;--bk-green:#166534;--bk-green-bg:#dcfce7;--bk-head:var(--font-poppins), "Poppins", system-ui, sans-serif;color:var(--bk-ink);font-family:var(--font-dm-sans), "DM Sans", system-ui, sans-serif;background:#f6f8fb;min-height:60vh;font-size:15px;line-height:1.5}.bk-wrap{box-sizing:border-box;max-width:1200px;margin:0 auto;padding:0 16px}@media (min-width:768px){.bk-wrap{padding:0 24px}}.bk-main{flex-direction:column;gap:20px;padding-top:20px;padding-bottom:40px;display:flex}.bk-head{font-family:var(--bk-head)}.bk-eyebrow{font-family:var(--bk-head);letter-spacing:.14em;color:#e2571a;font-size:12.5px;font-weight:700}.bk-h1{font-family:var(--bk-head);letter-spacing:-.02em;color:var(--bk-ink);margin:0;font-size:26px;font-weight:800;line-height:1.15}@media (min-width:768px){.bk-h1{font-size:36px}}.bk-lead{color:var(--bk-text);max-width:640px;margin:0}.bk-tap{transition:transform .15s,background .2s,color .2s}.bk-tap:active{transform:scale(.97)}.bk-fade{animation:.25s both bkFade}@keyframes bkFade{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}.bk-search{border:1px solid var(--bk-field);background:#fff;border-radius:12px;flex:260px;align-items:center;gap:8px;max-width:420px;height:46px;padding:0 12px;display:flex}.bk-search input{min-width:0;font:inherit;color:var(--bk-ink);background:0 0;border:0;outline:none;flex:auto;font-size:16px}.bk-search input::placeholder{color:#8a9aa8}.bk-search:focus-within{border-color:var(--bk-navy);box-shadow:0 0 0 3px #12384f1f}.bk-pill-ok{color:var(--bk-green);background:var(--bk-green-bg);border-radius:999px;align-items:center;gap:6px;padding:6px 12px;font-size:13.5px;font-weight:700;display:inline-flex}.bk-seg{background:#e8eef3;border-radius:12px;grid-template-columns:1fr 1fr;align-self:flex-start;gap:4px;padding:4px;display:inline-grid}.bk-seg button{cursor:pointer;min-height:40px;font-family:var(--bk-head);color:var(--bk-muted);background:0 0;border:0;border-radius:9px;padding:0 14px;font-size:13.5px;font-weight:600}.bk-seg button[aria-selected=true]{color:var(--bk-ink);background:#fff;box-shadow:0 2px 6px #12384f26}.bk-pass{background:var(--bk-navy);color:#fff;border-radius:18px;grid-template-columns:minmax(0,1fr);align-items:center;gap:16px;padding:16px 18px;display:grid}@media (min-width:768px){.bk-pass{grid-template-columns:minmax(0,1fr) auto}}.bk-pass-stack{flex:none;width:92px;height:70px;position:relative}.bk-pass-stack>div{width:40px;position:absolute}.bk-chips{flex-wrap:wrap;gap:8px;display:flex}.bk-chip{cursor:pointer;min-height:40px;color:var(--bk-text);font-family:var(--bk-head);background:#fff;border:1px solid #d5dee6;border-radius:999px;align-items:center;gap:6px;padding:0 14px;font-size:13.5px;font-weight:600;display:inline-flex}.bk-chip[aria-pressed=true]{background:var(--bk-navy);color:#fff;border-color:var(--bk-navy)}.bk-chip-dot{border-radius:999px;width:10px;height:10px}.bk-chip-n{opacity:.75;font-weight:500}.bk-banner{background:#fff1e8;border:1px solid #f9b48c;border-radius:14px;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;padding:12px 14px;font-size:14.5px;display:flex}.bk-strike{color:var(--bk-muted);text-decoration:line-through}.bk-btn{cursor:pointer;min-height:44px;font-family:var(--bk-head);border:0;border-radius:10px;justify-content:center;align-items:center;gap:6px;padding:0 16px;font-size:14px;font-weight:700;text-decoration:none;display:inline-flex}.bk-btn-o{background:var(--bk-orange);color:#fff}.bk-btn-o:hover{color:#fff;background:#e2571a}.bk-btn-on{background:var(--bk-green-bg);color:var(--bk-green)}.bk-btn-ghost{color:var(--bk-navy);border:1px solid var(--bk-field);background:#fff;font-weight:600}.bk-btn-navy{background:var(--bk-navy);color:#fff}.bk-btn[disabled]{cursor:not-allowed;opacity:.65}.bk-btn:focus-visible,.bk-chip:focus-visible,.bk-seg button:focus-visible{outline:2px solid var(--bk-orange);outline-offset:2px}.bk-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;display:grid}@media (min-width:768px){.bk-grid{grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}}@media (min-width:1100px){.bk-grid{grid-template-columns:repeat(4,minmax(0,1fr))}}.bk-card{border:1px solid var(--bk-line);background:#fff;border-radius:16px;flex-direction:column;gap:10px;min-width:0;padding:8px;transition:transform .2s,box-shadow .2s;display:flex}@media (min-width:768px){.bk-card{padding:12px}.bk-card:hover{transform:translateY(-3px);box-shadow:0 14px 28px #12384f1f}}.bk-card-cover{border-radius:12px;padding:8px 10px;display:block}@media (min-width:768px){.bk-card-cover{padding:14px 22px}}.bk-card-series{letter-spacing:.08em;text-transform:uppercase;font-size:11.5px;font-weight:800}.bk-card-title{font-family:var(--bk-head);color:var(--bk-ink);font-size:13.5px;font-weight:700;line-height:1.3;text-decoration:none}.bk-card-title:hover{color:var(--bk-orange-ink)}@media (min-width:768px){.bk-card-title{font-size:15px}}.bk-meta{color:var(--bk-muted);font-size:12.5px}.bk-price{font-family:var(--bk-head);font-size:20px;font-weight:700}.bk-student{color:var(--bk-green);font-size:12.5px;font-weight:700}.bk-card-btns{grid-template-columns:1fr;gap:8px;display:grid}@media (min-width:768px){.bk-card-btns{grid-template-columns:1fr 1fr}}.bk-card-btns .bk-btn{padding:0 8px;font-size:13.5px}.bk-form{flex-direction:column;gap:8px;display:flex}.bk-form label{flex-direction:column;gap:4px;font-size:12.5px;font-weight:700;display:flex}.bk-field{border:1px solid var(--bk-field);background:#fff;border-radius:10px;min-height:44px;display:flex;overflow:hidden}.bk-field:focus-within{border-color:var(--bk-navy)}.bk-field.bk-bad{border-color:#b91c1c}.bk-cc{color:var(--bk-muted);border-right:1px solid var(--bk-field);align-items:center;padding:0 8px;font-size:13.5px;display:flex}.bk-field input,.bk-field textarea{min-width:0;font:inherit;color:var(--bk-ink,#0b1f2c);background:0 0;border:0;outline:none;flex:auto;padding:0 10px;font-size:16px;font-weight:400}.bk-field input::placeholder,.bk-field textarea::placeholder{color:#8a9aa8}.bk-err{color:#b91c1c;font-size:12px}.bk-ok{color:var(--bk-green);background:#f0fdf4;border-radius:10px;padding:8px 10px;font-size:13px}.bk-ok a{color:#15803d;font-weight:700}.bk-hp{width:1px;height:1px;position:absolute;left:-9999px;overflow:hidden}.bk-steps{grid-template-columns:minmax(0,1fr);gap:12px;display:grid}@media (min-width:768px){.bk-steps{grid-template-columns:repeat(3,minmax(0,1fr))}}.bk-step{border:1px solid var(--bk-line);background:#fff;border-radius:14px;align-items:flex-start;gap:12px;padding:14px;display:flex}.bk-step-n{color:#e2571a;width:32px;height:32px;font-family:var(--bk-head);background:#fff1e8;border-radius:10px;flex:none;justify-content:center;align-items:center;font-weight:800;display:flex}.bk-cart{z-index:30;background:var(--bk-ink);color:#fff;padding-bottom:env(safe-area-inset-bottom);position:sticky;bottom:0;box-shadow:0 -8px 20px #0b1f2c2e}.bk-cart-row{align-items:center;gap:12px;padding-top:10px;padding-bottom:10px;display:flex}.bk-cart-sum{min-width:0;color:inherit;text-align:left;cursor:pointer;font:inherit;background:0 0;border:0;flex:auto;padding:0}.bk-cart-sum strong{font-family:var(--bk-head);font-size:17px;line-height:1.2;display:block}.bk-cart-sum span{color:#c3d0da;font-size:12.5px}.bk-cart-list{border-bottom:1px solid #ffffff1f;flex-direction:column;gap:6px;margin:0;padding:10px 0;font-size:14px;list-style:none;display:flex}.bk-cart-list li{justify-content:space-between;align-items:center;gap:8px;display:flex}.bk-cart-list button{color:#f9b48c;cursor:pointer;min-height:36px;font:inherit;background:0 0;border:0;font-size:13px;text-decoration:underline}.bk-cart-note{color:#fde68a;padding-top:8px;font-size:12.5px}.bk-hero{grid-template-columns:minmax(0,1fr);gap:20px;display:grid}@media (min-width:900px){.bk-hero{grid-template-columns:320px minmax(0,1fr);align-items:start;gap:32px}}.bk-panel{border:1px solid var(--bk-line);background:#fff;border-radius:16px;flex-direction:column;gap:12px;padding:16px;display:flex}.bk-h2{font-family:var(--bk-head);color:var(--bk-ink);margin:0;font-size:20px;font-weight:800}.bk-list{flex-direction:column;gap:8px;margin:0;padding:0;list-style:none;display:flex}.bk-list li{align-items:flex-start;gap:8px;display:flex}.bk-chapters{counter-reset:ch;flex-direction:column;margin:0;padding:0;list-style:none;display:flex}.bk-chapters li{border-top:1px solid var(--bk-line);gap:12px;padding:10px 0;display:flex}.bk-chapters li:first-child{border-top:0}.bk-ch-n{width:28px;height:28px;color:var(--bk-navy);font-family:var(--bk-head);background:#e8f0f6;border-radius:8px;flex:none;justify-content:center;align-items:center;font-size:13px;font-weight:700;display:flex}.bk-two{grid-template-columns:minmax(0,1fr);gap:20px;display:grid}@media (min-width:900px){.bk-two{grid-template-columns:minmax(0,1fr) 360px;align-items:start}}.bk-course{border:1px solid var(--bk-line);color:inherit;background:#fff;border-radius:14px;align-items:center;gap:12px;padding:10px;text-decoration:none;display:flex}.bk-course:hover{border-color:var(--bk-field)}.bk-course img{object-fit:cover;background:#e8eef3;border-radius:8px;flex:none;width:72px;height:54px}.bk-rel{border:1px solid var(--bk-line);color:var(--bk-ink,#0b1f2c);background:#fff;border-radius:14px;align-items:center;gap:12px;max-width:520px;padding:12px;text-decoration:none;display:flex}.bk-rel:hover{border-color:#c9d5df}.bk-rel-cover{flex:none;width:56px}.bk-cover{aspect-ratio:2/3;background:#fbf7f2;border-radius:4px;width:100%;position:relative;overflow:hidden;box-shadow:0 6px 16px #0b1f2c24;container-type:inline-size}.bk-cover img{object-fit:cover;width:100%;height:100%;display:block}.bk-cover-top{height:62%;position:absolute;top:0;left:0;right:0}.bk-cover-no{font-family:var(--bk-head);color:#0000;-webkit-text-stroke:.6cqw var(--bk-acc,#f26522);font-size:46cqw;font-weight:800;line-height:1;position:absolute;top:8%;left:6%}.bk-cover-bottom{background:#fbf7f2;flex-direction:column;gap:2cqw;padding:5cqw 7cqw;display:flex;position:absolute;inset:62% 0 0}.bk-cover-title{font-family:var(--bk-head);font-size:8.5cqw;font-weight:800;line-height:1.05}.bk-cover-foot{letter-spacing:.1em;color:#1e2a33;border-top:.4cqw solid #1e2a33;justify-content:space-between;margin-top:auto;padding-top:2cqw;font-size:4cqw;font-weight:700;display:flex}@media (prefers-reduced-motion:reduce){.bk-fade{animation:none}.bk-card,.bk-tap{transition:none}.bk-card:hover{transform:none}}