/* 电商表格公式速查 */
.sf-page {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
}

.sf-breadcrumb {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
    padding-top: var(--spacing-lg);
}
.sf-breadcrumb a {
    color: var(--primary-color);
    text-decoration: none;
}
.sf-breadcrumb a:hover { text-decoration: underline; }
.sf-breadcrumb .sep { margin: 0 6px; color: var(--text-tertiary); }

/* Hero */
.sf-hero {
    background: var(--bg-secondary, #f8fafc);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    text-align: left;
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl) var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}
.sf-hero-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}
.sf-hero h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin: 0 0 8px;
    color: var(--text-primary);
}
.sf-hero-sub {
    color: var(--text-secondary);
    margin: 0 0 var(--spacing-md);
    font-size: 0.95rem;
}
.sf-hero-stats {
    display: flex;
    gap: var(--spacing-lg);
    font-size: 0.9rem;
    color: var(--text-secondary);
}
.sf-hero-stats strong {
    font-size: 1.1rem;
    margin-right: 4px;
    color: var(--text-primary);
}

.sf-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: var(--spacing-md);
}
.sf-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 0.78rem;
    font-weight: 500;
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary-color);
}
.sf-tag--fn {
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    background: rgba(15, 23, 42, 0.06);
    color: var(--text-primary);
}

/* 分类区块（索引页） */
.sf-section {
    margin-bottom: var(--spacing-2xl);
}
.sf-section-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: var(--spacing-md);
}
.sf-section-head i {
    font-size: 1.25rem;
}
.sf-section-head h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.sf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-md);
}
.sf-card {
    display: block;
    padding: var(--spacing-md) var(--spacing-lg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, box-shadow 0.15s;
}
.sf-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.1);
}
.sf-card h3 {
    font-size: 0.95rem;
    font-weight: 600;
    margin: 0 0 8px;
    color: var(--text-primary);
}
.sf-card-tags { margin-bottom: 6px; }
.sf-card-problem {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 详情页区块 */
.sf-block {
    margin-bottom: var(--spacing-xl);
}
.sf-block h2 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: 8px;
}
.sf-problem {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 迷你表格 */
.sf-table-wrap {
    overflow-x: auto;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}
.sf-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}
.sf-table th,
.sf-table td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.sf-table th {
    background: var(--bg-secondary);
    font-weight: 600;
    white-space: nowrap;
}
.sf-table--excel .sf-grid-corner,
.sf-table--excel .sf-grid-col,
.sf-table--excel .sf-grid-row {
    background: #eef2f7;
    color: var(--text-tertiary, #94a3b8);
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 0.72rem;
    font-weight: 500;
    text-align: center;
    padding: 6px 10px;
    user-select: none;
    white-space: nowrap;
}
.sf-table--excel .sf-grid-corner {
    width: 36px;
    min-width: 36px;
}
.sf-table--excel .sf-grid-row {
    width: 36px;
    min-width: 36px;
    border-right: 1px solid var(--border-color);
}
.sf-table--excel .sf-grid-axis .sf-grid-col {
    border-bottom: 1px solid var(--border-color);
}
.sf-table--excel th,
.sf-table--excel td {
    border-right: 1px solid var(--border-color);
}
.sf-table--excel tr > *:last-child {
    border-right: none;
}
.sf-table--excel thead tr:nth-child(2) th:not(.sf-grid-row) {
    background: var(--bg-secondary);
    font-weight: 600;
    text-align: left;
    font-size: 0.85rem;
    font-family: inherit;
    color: var(--text-primary);
}
.sf-table tr:last-child td { border-bottom: none; }
.sf-table td:last-child {
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    color: var(--primary-color);
}

/* 双表示例（跨表查找） */
.sf-tables-demo {
    display: flex;
    flex-direction: column;
}
.sf-table-panel + .sf-tables-connector,
.sf-tables-connector + .sf-table-panel {
    margin-top: 0;
}
.sf-table-label {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.sf-table-panel--target .sf-table-label::before,
.sf-table-panel--source .sf-table-label::before {
    content: '';
    width: 8px;
    height: 8px;
    border-radius: 2px;
    flex-shrink: 0;
}
.sf-table-panel--target .sf-table-label::before {
    background: var(--primary-color, #6366f1);
}
.sf-table-panel--source .sf-table-label::before {
    background: #0ea5e9;
}
.sf-tables-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 12px 0;
    color: var(--text-tertiary, #9ca3af);
    font-size: 0.8rem;
    gap: 4px;
}
.sf-tables-connector i {
    font-size: 1.1rem;
    color: var(--primary-color, #6366f1);
}
.sf-col--hl {
    background: rgba(99, 102, 241, 0.07);
}
.sf-table th.sf-col--hl {
    background: rgba(99, 102, 241, 0.13);
}
.sf-col--formula {
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    color: var(--primary-color, #6366f1);
    font-weight: 500;
}
.sf-cell-formula {
    display: block;
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 0.72rem;
    font-weight: 500;
    color: #1d6f42;
    word-break: break-all;
    line-height: 1.45;
}
.sf-tables-demo .sf-col--formula {
    color: inherit;
}
.sf-tables-demo .sf-col--formula .sf-cell-formula {
    color: #1d6f42;
}
.sf-tables-demo .sf-table td:last-child {
    font-family: inherit;
    color: inherit;
}

/* 函数语法 */
.sf-syntax-box {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary, #f8fafc);
    padding: 14px 16px;
}
.sf-syntax-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
}
.sf-syntax-item {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 12px;
    font-size: 0.88rem;
    line-height: 1.6;
    padding: 10px 0;
}
.sf-syntax-item + .sf-syntax-item {
    border-top: 1px dashed var(--border-color);
}
.sf-syntax-name {
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-primary);
    background: #fff;
    border: 1px solid var(--border-color);
    padding: 2px 8px;
    border-radius: 4px;
    flex-shrink: 0;
    min-width: 52px;
    text-align: center;
}
.sf-syntax-text {
    font-family: 'JetBrains Mono', 'Consolas', monospace;
    font-size: 0.84rem;
    color: var(--text-secondary);
}

/* 常见错误 / 格式说明 */
.sf-notes-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}
.sf-notes-card {
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-secondary, #f8fafc);
    padding: 14px 16px;
}
.sf-notes-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 10px;
}
.sf-notes-title i {
    font-size: 1rem;
    color: var(--text-secondary);
}
.sf-notes-list {
    margin: 0;
    padding-left: 1.1rem;
    font-size: 0.86rem;
    color: var(--text-secondary);
    line-height: 1.65;
}
.sf-notes-list li + li {
    margin-top: 6px;
}
@media (max-width: 640px) {
    .sf-notes-grid {
        grid-template-columns: 1fr;
    }
}

/* CTA */
.sf-cta-primary {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(139, 92, 246, 0.08));
    border: 1px solid rgba(99, 102, 241, 0.25);
    text-decoration: none;
    color: inherit;
    transition: border-color 0.15s, transform 0.15s;
}
.sf-cta-primary:hover {
    border-color: var(--primary-color);
    transform: translateY(-1px);
}
.sf-cta-icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: var(--primary-color);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
}
.sf-cta-body h3 {
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0 4px;
    color: var(--text-primary);
}
.sf-cta-body p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}
.sf-cta-arrow {
    margin-left: auto;
    align-self: center;
    color: var(--primary-color);
    font-size: 1.25rem;
}

.sf-cta-secondary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: var(--spacing-md);
    font-size: 0.88rem;
    color: var(--primary-color);
    text-decoration: none;
}
.sf-cta-secondary:hover { text-decoration: underline; }

/* 相关场景 */
.sf-related {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}
.sf-related a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    text-decoration: none;
    color: var(--text-primary);
    transition: border-color 0.15s;
}
.sf-related a:hover { border-color: var(--primary-color); }

.sf-back {
    margin-top: var(--spacing-xl);
    font-size: 0.9rem;
}
.sf-back a {
    color: var(--primary-color);
    text-decoration: none;
}
.sf-back a:hover { text-decoration: underline; }

@media (max-width: 640px) {
    .sf-hero h1 { font-size: 1.4rem; }
    .sf-cta-primary { flex-wrap: wrap; }
    .sf-cta-arrow { display: none; }
}