.lesson-link[data-v-9b5f5b52]{height:100%;color:inherit;text-decoration:none;display:block}.lesson-card[data-v-9b5f5b52]{border:1px solid var(--color-item-border);background:var(--color-surface);height:100%;min-height:13rem;box-shadow:var(--shadow-card);cursor:pointer;border-radius:.55rem;flex-direction:column;display:flex;overflow:hidden}.lesson-card[data-v-9b5f5b52]:hover{border-color:var(--overlay-hover-border);box-shadow:var(--shadow-hover);transform:translateY(-3px)}.lesson-card.active[data-v-9b5f5b52]{border-color:var(--color-primary);box-shadow:0 0 0 1px var(--overlay-hover-border),var(--shadow-card)}.lesson-cover[data-v-9b5f5b52]{background:linear-gradient(135deg,var(--color-primary),var(--color-primary-strong));justify-content:flex-end;align-items:flex-start;min-height:12rem;display:flex;position:relative;overflow:hidden}.lesson-cover[data-v-9b5f5b52]:after{background:linear-gradient(180deg,transparent,var(--color-surface));content:"";height:15%;position:absolute;inset:auto 0 0}.lesson-cover .image[data-v-9b5f5b52]{-o-object-fit:cover;object-fit:cover;opacity:0;width:100%;height:12rem;transition:opacity .35s}.lesson-cover .image.is-loaded[data-v-9b5f5b52]{opacity:1}.lesson-cover .image-skeleton[data-v-9b5f5b52]{z-index:0;background:linear-gradient(100deg,var(--color-surface-soft) 30%,var(--color-elevated) 50%,var(--color-surface-soft) 70%);background-size:200% 100%;animation:1.2s ease-in-out infinite lesson-cover-shimmer-9b5f5b52;position:absolute;inset:0}@keyframes lesson-cover-shimmer-9b5f5b52{0%{background-position:150% 0}to{background-position:-150% 0}}.lesson-count[data-v-9b5f5b52]{z-index:1;color:var(--color-text-inverse);box-shadow:var(--shadow-item);background:#0d1b2ab8;border:1px solid #ffffff2e;border-radius:999px;align-items:center;gap:.5rem;padding:.25rem .55rem;font-size:.68rem;font-weight:800;display:flex;position:absolute;top:.5rem;right:.5rem}.lesson-body[data-v-9b5f5b52]{background:var(--custom-box-one);flex-direction:column;flex:1;gap:.5rem;padding:.75rem;display:flex}.lesson-title[data-v-9b5f5b52]{color:var(--color-text);font-size:.92rem;font-weight:850;line-height:1.35}.lesson-subtitle[data-v-9b5f5b52],.lesson-title[data-v-9b5f5b52]{-webkit-line-clamp:2;-webkit-box-orient:vertical;margin:0;display:-webkit-box;overflow:hidden}.lesson-subtitle[data-v-9b5f5b52]{min-height:1.15rem;color:var(--color-text-muted);font-size:.78rem;line-height:1.4}.progress-wrap[data-v-9b5f5b52]{gap:.35rem;display:grid}.progress-track[data-v-9b5f5b52]{background:var(--color-border-subtle);border-radius:999px;height:.35rem;display:block;overflow:hidden}.progress-fill[data-v-9b5f5b52]{border-radius:inherit;background:linear-gradient(90deg,var(--color-primary),var(--color-accent));width:38%;height:100%;box-shadow:0 0 .7rem var(--overlay-hover-border);display:block}.progress-text[data-v-9b5f5b52]{color:var(--color-text-subtle);font-size:.68rem;font-weight:800}.lesson-cta[data-v-9b5f5b52]{background:linear-gradient(180deg,var(--color-primary),var(--color-primary-strong));width:100%;color:var(--color-text-inverse);cursor:pointer;border:0;border-radius:.4rem;margin-top:auto;padding:.48rem .7rem;font-size:.78rem;font-weight:850}@media (width<=768px){.lesson-card[data-v-9b5f5b52]{min-height:12.5rem}}.vocal-node[data-v-46bf53ee]{--tree-depth-1-bg:#101f35;--tree-depth-2-bg:#13243b;--tree-depth-3-bg:#162943;--tree-depth-4-bg:#192e4b;--tree-depth-1-border:#2b4366;--tree-depth-2-border:#314c73;--tree-depth-3-border:#375580;--tree-depth-4-border:#3d5f8d;border:1px solid var(--color-item-border);background:var(--color-surface-soft);border-radius:.65rem;padding:.75rem}html.light .vocal-node[data-v-46bf53ee]{--tree-depth-1-bg:#f6faff;--tree-depth-2-bg:#f1f7fe;--tree-depth-3-bg:#ebf4fd;--tree-depth-4-bg:#e4f0fc;--tree-depth-1-border:#d7e5f6;--tree-depth-2-border:#cddff3;--tree-depth-3-border:#c2d8f0;--tree-depth-4-border:#b7d2ed}.vocal-node.no-frame[data-v-46bf53ee]{box-shadow:none;background:0 0;border:0;border-radius:0;padding:0}.vocal-node.highlight[data-v-46bf53ee]{border-color:var(--overlay-hover-border);box-shadow:0 0 0 1px var(--overlay-hover)}.node-head[data-v-46bf53ee]{width:100%;color:var(--color-text);background:0 0;border:0;justify-content:space-between;align-items:center;gap:.7rem;padding:0;display:flex}.node-head.clickable[data-v-46bf53ee]{cursor:pointer}.head-main[data-v-46bf53ee]{align-items:center;gap:.45rem;min-width:0;display:flex}.arrow[data-v-46bf53ee]{color:var(--color-primary-strong);transition:transform .2s;transform:rotate(-90deg)}.arrow.open[data-v-46bf53ee]{transform:rotate(0)}.node-name[data-v-46bf53ee]{text-align:left;font-size:.92rem;font-weight:800;line-height:1.35}.node-count[data-v-46bf53ee]{border:1px solid var(--color-item-border);background:var(--wash-primary);color:var(--color-text-muted);border-radius:999px;flex-shrink:0;padding:.22rem .55rem;font-size:.68rem;font-weight:800}.node-description[data-v-46bf53ee]{color:var(--color-text-muted);margin:.45rem 0 0;font-size:.82rem;line-height:1.45}.node-body[data-v-46bf53ee]{gap:.75rem;margin-top:.75rem;display:grid}.branch-list[data-v-46bf53ee]{gap:.65rem;display:grid}.lesson-grid[data-v-46bf53ee]{grid-template-columns:repeat(3,minmax(0,1fr));gap:.75rem;display:grid}.load-wrap[data-v-46bf53ee]{justify-content:center;display:flex}.load-more[data-v-46bf53ee]{border:1px solid var(--color-item-border);background:var(--color-surface-soft);color:var(--color-text);cursor:pointer;border-radius:.55rem;padding:.65rem 1rem;font-size:.8rem;font-weight:800}.load-more[data-v-46bf53ee]:hover{border-color:var(--overlay-hover-border)}.tree-reveal-enter-active[data-v-46bf53ee],.tree-reveal-leave-active[data-v-46bf53ee]{transition:opacity .2s,transform .2s}.tree-reveal-enter-from[data-v-46bf53ee],.tree-reveal-leave-to[data-v-46bf53ee]{opacity:0;transform:translateY(-4px)}@media (width<=1180px){.lesson-grid[data-v-46bf53ee]{grid-template-columns:repeat(2,minmax(0,1fr))}}@media (width<=768px){.vocal-node[data-v-46bf53ee]{border-radius:.55rem;padding:.65rem}.lesson-grid[data-v-46bf53ee]{grid-template-columns:1fr}}.group-section[data-v-9773ec01]{border:1px solid var(--color-item-border);background:radial-gradient(circle at 90% 0,var(--wash-primary),transparent 34%),var(--color-surface);box-shadow:var(--shadow-card);border-radius:.65rem;margin-bottom:0;padding:1rem}.group-header[data-v-9773ec01]{justify-content:space-between;align-items:flex-start;gap:.9rem;margin-bottom:.9rem;display:flex}.group-info[data-v-9773ec01]{gap:.35rem;display:grid}.group-title[data-v-9773ec01]{color:var(--color-text);align-items:center;gap:.55rem;margin:0;font-size:clamp(1.15rem,1.7vw,1.55rem);font-weight:850;line-height:1.2;display:flex}.group-description[data-v-9773ec01]{color:var(--color-text-muted);margin:0;font-size:.88rem;line-height:1.5}.group-toggle[data-v-9773ec01]{border:1px solid var(--color-item-border);background:var(--color-surface-soft);width:2.4rem;height:2.4rem;color:var(--color-primary-strong);cursor:pointer;border-radius:.5rem;flex-shrink:0}.group-toggle[data-v-9773ec01]:hover{border-color:var(--overlay-hover-border);box-shadow:var(--shadow-hover)}.toggle-icon[data-v-9773ec01]{font-size:1.35rem;transition:transform .2s;display:inline-flex;transform:rotate(-90deg)}.toggle-icon.open[data-v-9773ec01]{transform:rotate(0)}.section-reveal-enter-active[data-v-9773ec01],.section-reveal-leave-active[data-v-9773ec01]{transition:opacity .2s,transform .2s}.section-reveal-enter-from[data-v-9773ec01],.section-reveal-leave-to[data-v-9773ec01]{opacity:0;transform:translateY(-4px)}@media (width<=768px){.group-section[data-v-9773ec01]{border-radius:.55rem;padding:.8rem}.group-header[data-v-9773ec01]{margin-bottom:.7rem}}