/* ===== 数字划消训练 ===== */
#ncApp .nc-hero { text-align: center; padding: 12px 10px 0; }
#ncApp .nc-hero h1 { font-size: 30px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#ncApp .nc-hero p { font-size: 15px; color: var(--c-text-sub); line-height: 1.7; }

#ncApp .nc-bar { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin: 18px 0; }
#ncApp .nc-tab {
    border: 2px solid var(--c-primary); background: transparent; color: var(--c-primary);
    border-radius: 999px; padding: 8px 16px; font-size: 14px; font-weight: 700;
    cursor: pointer; transition: background .15s, color .15s;
}
#ncApp .nc-tab.is-on { background: var(--c-primary); color: #fff; }

#ncApp .nc-panel {
    max-width: 680px; margin: 0 auto; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: var(--radius-md);
    padding: 22px 18px; box-shadow: var(--shadow-md); text-align: center;
}
#ncApp .nc-task {
    display: inline-block; margin-bottom: 14px; padding: 10px 20px; border-radius: 999px;
    background: var(--c-primary-soft); border: 1px solid var(--c-border);
    font-size: 17px; font-weight: 800; color: var(--c-primary);
}
#ncApp .nc-task b { font-size: 22px; }
#ncApp .nc-hud { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-bottom: 16px; }
#ncApp .nc-chip {
    background: var(--c-surface-soft); border: 1px solid var(--c-border); border-radius: 999px;
    padding: 7px 14px; font-size: 14px; font-weight: 700; color: var(--c-text-sub);
}
#ncApp .nc-chip b { color: var(--c-primary); font-size: 17px; }

#ncApp .nc-grid { display: grid; gap: 4px; margin: 0 auto; max-width: 560px; }
#ncApp .nc-cell {
    aspect-ratio: 1 / 1; border: 1px solid var(--c-border); border-radius: 7px;
    background: var(--c-surface-soft); color: var(--c-text);
    font-size: clamp(13px, 2.6vw, 20px); font-weight: 800; cursor: pointer;
    display: flex; align-items: center; justify-content: center;
    font-variant-numeric: tabular-nums; transition: .12s; user-select: none; padding: 0;
}
#ncApp .nc-cell:hover { border-color: var(--c-primary); }
#ncApp .nc-cell.mark { background: var(--c-primary-soft); color: var(--c-primary); text-decoration: line-through; border-color: var(--c-primary); }
#ncApp .nc-cell.ok { background: var(--c-primary-soft); color: var(--c-primary); }
#ncApp .nc-cell.bad { background: #fff0f0; color: #e03131; border-color: #e03131; text-decoration: line-through; }
#ncApp .nc-cell.miss { border-color: var(--c-accent-green); background: #e9fbf1; color: var(--c-primary); animation: ncBlink 1s ease 2; }
@keyframes ncBlink { 0%,100% { opacity: 1; } 50% { opacity: .35; } }

#ncApp .nc-msg { font-size: 17px; font-weight: 800; min-height: 26px; margin-top: 16px; color: var(--c-text); }
#ncApp .nc-msg.ok { color: var(--c-primary); }
#ncApp .nc-msg.bad { color: #e03131; }

#ncApp .nc-ctrl { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; margin-top: 18px; }
#ncApp .nc-btn {
    border: none; border-radius: 999px; padding: 12px 20px; font-size: 15px; font-weight: 700;
    color: #fff; cursor: pointer; background: linear-gradient(135deg, var(--c-primary), var(--c-accent-cyan));
    box-shadow: var(--shadow-md);
}
#ncApp .nc-btn.gray { background: var(--c-surface-2); color: var(--c-text); box-shadow: none; border: 1px solid var(--c-border); }
#ncApp .nc-btn:disabled { opacity: .5; cursor: default; }

#ncApp .nc-stat {
    max-width: 680px; margin: 18px auto 0; background: var(--c-surface);
    border: 1px solid var(--c-border); border-radius: var(--radius-md);
    padding: 14px 18px; box-shadow: var(--shadow-md); text-align: center;
    font-size: 14px; line-height: 1.9; color: var(--c-text-sub);
}
#ncApp .nc-stat b { color: var(--c-primary); font-size: 17px; }

#ncApp .nc-ai, #ncApp .nc-info { max-width: 720px; margin: 30px auto 0; }
#ncApp .nc-ai h2, #ncApp .nc-info h2 { font-size: 20px; font-weight: 800; color: var(--c-text); margin-bottom: 10px; }
#ncApp .nc-ai p { font-size: 14px; color: var(--c-text-sub); line-height: 1.8; margin-bottom: 14px; }
#ncApp .nc-ai-row { display: flex; gap: 10px; flex-wrap: wrap; }
#ncApp .nc-out {
    margin-top: 14px; background: var(--c-surface-soft); border: 1px solid var(--c-border);
    border-radius: var(--radius-sm); padding: 16px 18px;
    font-size: 15px; line-height: 1.85; color: var(--c-text); white-space: pre-wrap;
}
#ncApp .nc-info ul { list-style: disc; padding-left: 22px; margin-bottom: 24px; }
#ncApp .nc-info li { font-size: 14px; line-height: 1.9; color: var(--c-text-sub); margin-bottom: 8px; }
#ncApp .nc-info li b { color: var(--c-text); }

@media (max-width: 560px) {
    #ncApp .nc-hero h1 { font-size: 24px; }
    #ncApp .nc-grid { gap: 3px; }
}