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a{display:block;color:var(--seal);font-weight:700;font-size:.88rem;text-decoration:none}.bt-sec{margin:0 0 30px}.bt-sec-h{display:flex;align-items:center;gap:10px;margin:0 0 4px;font-size:1.2rem}.bt-sec-note{margin:0 0 12px;color:var(--ink-soft);font-size:.9rem;line-height:1.5;max-width:72ch}.stamp{flex:none;width:30px;height:30px;display:inline-flex;align-items:center;justify-content:center;border-radius:6px;font-family:"Noto Serif SC",serif;font-weight:700;font-size:1rem;color:#fff}.stamp--exam{background:var(--seal);box-shadow:inset 0 0 0 2px #ffffff59}.stamp--plus{background:var(--jade);box-shadow:inset 0 0 0 2px #ffffff59}.stamp--sm{width:22px;height:22px;font-size:.75rem;border-radius:5px}.bt-skills{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.bt-skill{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px;display:flex;flex-direction:column;gap:8px}.bt-skill h3{margin:0;font-size:1rem;display:flex;justify-content:space-between;align-items:baseline}.bt-skill h3 small{font-weight:500;color:var(--ink-soft);font-size:.78rem}.part{display:grid;grid-template-columns:auto 1fr auto;gap:4px 10px;align-items:center;padding:9px 10px;border-radius:10px;background:var(--wash);text-decoration:none;color:inherit}.part:hover{background:#ece6d6}.part-no{font:700 .75rem Be Vietnam Pro,sans-serif;color:var(--seal);white-space:nowrap}.part-name{font-weight:600;font-size:.9rem;line-height:1.3}.part-go{font-size:.8rem;color:var(--seal);font-weight:700}.part-meta{grid-column:2 / 4;font-size:.76rem;color:var(--ink-soft);display:flex;gap:8px;align-items:center}.bar{flex:1;height:5px;border-radius:3px;background:#e1daca;overflow:hidden;max-width:90px}.bar i{display:block;height:100%;background:var(--jade)}.bt-mock{margin-top:12px;display:flex;flex-wrap:wrap;gap:10px;align-items:center;padding:12px 14px;border:1.5px dashed var(--seal);border-radius:12px;background:#fff9f7}.bt-mock p{margin:0;flex:1;min-width:220px;font-size:.9rem}.btn{display:inline-block;padding:9px 16px;border-radius:999px;font-weight:700;font-size:.88rem;text-decoration:none;border:1px solid var(--line);color:var(--ink);background:var(--card)}.btn--seal{background:var(--seal);border-color:var(--seal);color:#fff}.bt-stages{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin:0 0 10px}.stage{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:10px 12px;text-decoration:none;color:inherit}.stage b{display:block;font-size:.95rem}.stage span{font-size:.78rem;color:var(--ink-soft)}.stage.is-done{border-color:var(--jade)}.stage.is-done b:after{content:" ✓";color:var(--jade)}.bt-extra{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.extra{display:flex;gap:10px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:12px;text-decoration:none;color:inherit}.extra b{display:block;font-size:.93rem}.extra span{font-size:.8rem;color:var(--ink-soft);line-height:1.45}.extra em{display:block;margin-top:4px;font-style:normal;font-size:.72rem;font-weight:700;color:var(--jade)}@media (max-width:820px){.bt-skills,.bt-extra{grid-template-columns:1fr}.bt-stages,.bt-me{grid-template-columns:repeat(2,1fr)}}a:focus-visible{outline:2px solid #3F6C8C;outline-offset:2px}.bt-crumb{font-size:.82rem;color:var(--ink-soft);margin:0 0 6px}.bt-crumb a{color:var(--ink-soft)}.bt-legend{display:flex;flex-wrap:wrap;gap:14px;align-items:center;font-size:.82rem;color:var(--ink-soft);margin:0 0 18px}.bt-legend span{display:inline-flex;gap:6px;align-items:center}.part[aria-disabled=true]{opacity:.55;pointer-events:none}.part.is-weak{box-shadow:inset 3px 0 0 var(--seal)}.bt-lessons{list-style:none;padding:0;margin:10px 0 0;display:grid;grid-template-columns:repeat(2,1fr);gap:6px}.bt-lessons li{display:flex;align-items:stretch;background:var(--card);border:1px solid var(--line);border-radius:10px;overflow:hidden}.bt-lessons li>a:first-child{flex:1;display:flex;gap:10px;align-items:center;padding:8px 10px;text-decoration:none;color:var(--ink);min-width:0}.bt-ln{flex:none;width:26px;height:26px;border-radius:50%;background:var(--jade);color:#fff;display:inline-flex;align-items:center;justify-content:center;font-weight:700;font-size:.78rem}.bt-lt{font-size:.86rem;line-height:1.35}.bt-lt small{color:var(--ink-soft)}.bt-lr{flex:none;display:flex;align-items:center;padding:0 12px;font-weight:700;font-size:.8rem;color:var(--seal);text-decoration:none;border-left:1px solid var(--line)}.bt-lr:hover{background:#fbedeb}.bt-faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:10px 14px;margin:0 0 8px}.bt-faq summary{font-weight:600;cursor:pointer}.bt-faq p{margin:8px 0 0;line-height:1.6;color:var(--ink-soft)}.bt-upd{font-size:.78rem;color:var(--ink-soft)}.bt-lvcard{display:flex;flex-direction:column;gap:4px;background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px;text-decoration:none;color:var(--ink)}.bt-lvcard b{font-size:1.3rem}.bt-lvcard span{font-size:.85rem;color:var(--ink-soft)}.bt-lvcard em{font-style:normal;color:var(--seal);font-weight:700;font-size:.85rem}.bt .bt-levels{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}@media (max-width:820px){.bt-lessons,.bt .bt-levels{grid-template-columns:1fr}}