/* 卖点提炼框架 */
.sp-tool-panel {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    overflow: hidden;
    min-height: 0;
}

.sp-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-muted, #f9fafb);
    flex-shrink: 0;
}

.sp-toolbar-left { display: flex; align-items: center; gap: 8px; }

.sp-title {
    font-size: 0.9rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
}

.sp-title i { color: #10b981; }

.sp-badge {
    font-size: 0.68rem;
    font-weight: 600;
    padding: 2px 7px;
    border-radius: 10px;
    background: rgba(16, 185, 129, 0.1);
    color: #059669;
}

.sp-toolbar-right { display: flex; align-items: center; gap: 6px; }

.sp-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px 10px;
    font-size: 0.78rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    cursor: pointer;
}

.sp-btn:hover { border-color: #10b981; color: #059669; }

.sp-btn-primary {
    background: linear-gradient(135deg, #10b981, #059669);
    border-color: transparent;
    color: #fff !important;
}

.sp-canvas-wrap {
    flex: 1;
    overflow: auto;
    padding: 16px;
    background-color: #f3f4f6;
    background-image: radial-gradient(circle, #d1d5db 1px, transparent 1px);
    background-size: 20px 20px;
    min-height: 480px;
}

.sp-board {
    max-width: 1200px;
    margin: 0 auto;
    background: #fff;
    border-radius: 14px;
    box-shadow: 0 4px 24px rgba(15, 23, 42, 0.08);
    padding: 24px 20px;
    min-width: 720px;
}

.sp-map-title {
    margin: 0 0 4px;
    font-size: 1.35rem;
    font-weight: 700;
    outline: none;
}

.sp-map-subtitle {
    margin: 0 0 20px;
    font-size: 0.82rem;
    color: #6b7280;
    outline: none;
}

.sp-columns {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 14px;
}

.sp-col {
    position: relative;
    min-height: 360px;
    border-radius: 12px;
    padding: 16px 14px 36px;
    display: flex;
    flex-direction: column;
}

.sp-col-feature { background: linear-gradient(180deg, #ecfdf5, #f0fdf4); }
.sp-col-benefit { background: linear-gradient(180deg, #eff6ff, #f0f9ff); }
.sp-col-proof { background: linear-gradient(180deg, #fff7ed, #ffedd5); }
.sp-col-copy { background: linear-gradient(180deg, #eef2ff, #f5f3ff); }

.sp-col-head {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
}

.sp-letter {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1;
}

.sp-letter-feature { color: #059669; }
.sp-letter-benefit { color: #2563eb; }
.sp-letter-proof { color: #d97706; }
.sp-letter-copy { color: #6366f1; }

.sp-col-name {
    margin: 0;
    font-size: 0.92rem;
    font-weight: 700;
    outline: none;
}

.sp-col-desc {
    margin: 4px 0 0;
    font-size: 0.72rem;
    color: #6b7280;
    outline: none;
}

.sp-notes {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
}

.sp-note {
    position: relative;
    padding: 8px 10px 8px 18px;
    font-size: 0.78rem;
    line-height: 1.5;
    background: rgba(255, 255, 255, 0.72);
    border-radius: 8px;
    outline: none;
    cursor: text;
}

.sp-note::before {
    content: '•';
    position: absolute;
    left: 8px;
    top: 8px;
    font-weight: 700;
}

.sp-note:focus {
    background: #fff;
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.3);
}

.sp-btn-add-note {
    position: absolute;
    right: 10px;
    bottom: 10px;
    width: 26px;
    height: 26px;
    border: 1px dashed #cbd5e1;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.85);
    cursor: pointer;
    opacity: 0.55;
}

.sp-col:hover .sp-btn-add-note { opacity: 1; }

@media (max-width: 960px) {
    .sp-columns { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .sp-columns { grid-template-columns: 1fr; }
}