/**
 * 博客详情 — 极简文档风（白底、细线分割、无渐变装饰）
 */

.blog-article-v2 {
    --ba-fg: #171717;
    --ba-muted: #737373;
    --ba-border: #e5e5e5;
    --ba-bg: #ffffff;
    --ba-bg-sub: #fafafa;
    --ba-code-bg: #f5f5f5;
    --ba-link: #171717;
    --ba-link-underline: #a3a3a3;
    --ba-accent: #0f766e;
    --ba-mono: ui-monospace, "SF Mono", Menlo, Consolas, monospace;
    background-color: var(--ba-bg);
    color: var(--ba-fg);
    min-height: 100vh;
}

/* 顶栏：仅底部分割线 */
.blog-article-v2 .ba-doc-head {
    max-width: 72rem;
    margin: 0 auto;
    padding: 1.5rem 1.25rem 2rem;
    border-bottom: 1px solid var(--ba-border);
}

.blog-article-v2 .ba-crumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8125rem;
    color: var(--ba-muted);
    margin-bottom: 1.25rem;
}

.blog-article-v2 .ba-crumb a {
    color: var(--ba-muted);
    text-decoration: none;
}

.blog-article-v2 .ba-crumb a:hover {
    color: var(--ba-fg);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.blog-article-v2 .ba-crumb-sep {
    color: #d4d4d4;
    user-select: none;
}

.blog-article-v2 .ba-doc-head h1 {
    font-size: clamp(1.5rem, 3.5vw, 2rem);
    font-weight: 600;
    line-height: 1.35;
    letter-spacing: -0.025em;
    margin: 0 0 0.75rem;
    max-width: 42rem;
}

.blog-article-v2 .ba-meta-line {
    margin: 0;
    font-size: 0.875rem;
    color: var(--ba-muted);
    line-height: 1.5;
}

/* 主体：左目录 + 正文 */
.blog-article-v2 .ba-doc-body {
    max-width: 72rem;
    margin: 0 auto;
    padding: 0 1.25rem 4rem;
    display: block;
}

@media (min-width: 1024px) {
    .blog-article-v2 .ba-doc-body {
        display: grid;
        grid-template-columns: 11.5rem minmax(0, 1fr);
        gap: 3rem;
        padding-top: 2rem;
        align-items: start;
    }
}

.blog-article-v2 .ba-toc-sidebar {
    display: none;
}

@media (min-width: 1024px) {
    .blog-article-v2 .ba-toc-sidebar {
        display: block;
        position: sticky;
        top: 5.5rem;
        align-self: start;
    }
}

.blog-article-v2 .ba-toc {
    padding: 0;
    margin: 0;
    border: none;
    box-shadow: none;
    background: transparent;
}

.blog-article-v2 .ba-toc h2 {
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--ba-muted);
    margin: 0 0 0.75rem;
}

.blog-article-v2 .ba-toc ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.blog-article-v2 .ba-toc a {
    display: block;
    font-size: 0.8125rem;
    line-height: 1.45;
    color: var(--ba-muted);
    text-decoration: none;
    padding: 0.35rem 0;
    border-left: 2px solid transparent;
    padding-left: 0.65rem;
    margin-left: -0.65rem;
    transition: color 0.15s, border-color 0.15s;
}

.blog-article-v2 .ba-toc a:hover {
    color: var(--ba-fg);
    border-left-color: var(--ba-fg);
}

.blog-article-v2 .ba-doc-main {
    counter-reset: ba-section;
    min-width: 0;
    max-width: 40rem;
    padding-top: 1.5rem;
}

@media (min-width: 1024px) {
    .blog-article-v2 .ba-doc-main {
        padding-top: 0;
        border-left: 1px solid var(--ba-border);
        padding-left: 2.5rem;
        margin-left: -1px;
    }
}

.blog-article-v2 .ba-mobile-toc {
    margin-bottom: 1.75rem;
    padding-bottom: 1.25rem;
    border-bottom: 1px solid var(--ba-border);
}

@media (min-width: 1024px) {
    .blog-article-v2 .ba-mobile-toc {
        display: none;
    }
}

.blog-article-v2 .ba-mobile-toc .ba-toc h2 {
    margin-bottom: 0.5rem;
}

.blog-article-v2 .ba-mobile-toc .ba-toc ul {
    display: flex;
    flex-wrap: wrap;
    gap: 0.35rem 0.5rem;
}

.blog-article-v2 .ba-mobile-toc .ba-toc li {
    margin: 0;
}

.blog-article-v2 .ba-mobile-toc .ba-toc a {
    display: inline-block;
    padding: 0.35rem 0.65rem;
    margin: 0;
    border: 1px solid var(--ba-border);
    border-radius: 0.25rem;
    border-left-width: 1px;
    padding-left: 0.65rem;
    font-size: 0.8125rem;
    background: var(--ba-bg-sub);
}

.blog-article-v2 .ba-mobile-toc .ba-toc a:hover {
    border-color: #d4d4d4;
    background: #fff;
}

/* 导语 */
.blog-article-v2 .ba-lede {
    font-size: 1.0625rem;
    line-height: 1.75;
    color: #404040;
    margin: 0 0 2.5rem;
    padding: 0;
    border: none;
}

.blog-article-v2 .ba-lede a {
    color: var(--ba-link);
    text-decoration: underline;
    text-decoration-color: var(--ba-link-underline);
    text-underline-offset: 3px;
}

.blog-article-v2 .ba-lede a:hover {
    text-decoration-color: var(--ba-fg);
}

/* 章节 — CSS 自动编号 */
.blog-article-v2 .ba-section {
    margin-bottom: 2.5rem;
    scroll-margin-top: 5.5rem;
}

.blog-article-v2 .ba-section h2 {
    font-size: 1.0625rem;
    font-weight: 600;
    line-height: 1.4;
    margin: 0 0 0.85rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--ba-border);
    letter-spacing: -0.02em;
}

.blog-article-v2 .ba-section h2::before {
    counter-increment: ba-section;
    content: counter(ba-section) ". ";
    color: var(--ba-muted);
    font-weight: 500;
}

.blog-article-v2 .ba-prose {
    font-size: 0.9375rem;
    line-height: 1.75;
    color: #404040;
}

.blog-article-v2 .ba-prose p {
    margin: 0 0 1rem;
}

.blog-article-v2 .ba-prose strong {
    color: var(--ba-fg);
    font-weight: 600;
}

.blog-article-v2 .ba-prose ol,
.blog-article-v2 .ba-prose ul {
    margin: 0 0 1rem;
    padding-left: 1.25rem;
}

.blog-article-v2 .ba-prose li {
    margin-bottom: 0.45rem;
}

.blog-article-v2 .ba-prose a {
    color: var(--ba-fg);
    text-decoration: underline;
    text-decoration-color: var(--ba-link-underline);
    text-underline-offset: 3px;
}

.blog-article-v2 .ba-prose a:hover {
    text-decoration-color: var(--ba-fg);
}

.blog-article-v2 .ba-data-table-wrap {
    overflow-x: auto;
    margin: 0 0 1rem;
    border: 1px solid var(--ba-border);
    border-radius: 0.25rem;
}

.blog-article-v2 .ba-data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.8125rem;
    line-height: 1.5;
}

.blog-article-v2 .ba-data-table th,
.blog-article-v2 .ba-data-table td {
    padding: 0.55rem 0.65rem;
    text-align: left;
    vertical-align: top;
    border-bottom: 1px solid var(--ba-border);
}

.blog-article-v2 .ba-data-table th {
    font-weight: 600;
    color: var(--ba-fg);
    background: var(--ba-bg-sub);
    white-space: nowrap;
}

.blog-article-v2 .ba-data-table tr:last-child td {
    border-bottom: none;
}

.blog-article-v2 .ba-matrix {
    display: grid;
    gap: 0.65rem;
    margin: 1rem 0 0;
}

@media (min-width: 640px) {
    .blog-article-v2 .ba-matrix {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.blog-article-v2 .ba-matrix-card {
    border: 1px solid var(--ba-border);
    border-radius: 0.25rem;
    padding: 0.85rem 1rem;
    background: var(--ba-bg);
}

.blog-article-v2 .ba-matrix-card h3 {
    font-size: 0.8125rem;
    font-weight: 600;
    margin: 0 0 0.5rem;
    color: var(--ba-fg);
}

.blog-article-v2 .ba-matrix-card p {
    margin: 0;
    font-size: 0.8125rem;
    line-height: 1.6;
    color: #525252;
}

.blog-article-v2 .ba-code {
    font-family: var(--ba-mono);
    font-size: 0.84em;
    background: var(--ba-code-bg);
    color: #262626;
    padding: 0.12em 0.4em;
    border-radius: 0.2rem;
    border: 1px solid #ebebeb;
    white-space: pre-wrap;
    word-break: break-word;
}

/* 双栏对比：单框分割 */
.blog-article-v2 .ba-compare {
    display: grid;
    margin: 1.25rem 0 0;
    border: 1px solid var(--ba-border);
    border-radius: 0.25rem;
    overflow: hidden;
}

@media (min-width: 560px) {
    .blog-article-v2 .ba-compare {
        grid-template-columns: 1fr 1fr;
    }
}

.blog-article-v2 .ba-compare-card {
    padding: 1rem 1.1rem;
    background: var(--ba-bg);
    border: none;
    border-radius: 0;
    box-shadow: none;
    transition: none;
}

.blog-article-v2 .ba-compare-card:hover {
    transform: none;
    box-shadow: none;
}

.blog-article-v2 .ba-compare-card:first-child {
    border-bottom: 1px solid var(--ba-border);
}

@media (min-width: 560px) {
    .blog-article-v2 .ba-compare-card:first-child {
        border-bottom: none;
        border-right: 1px solid var(--ba-border);
    }
}

.blog-article-v2 .ba-compare-card h3 {
    font-size: 0.8125rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin: 0 0 0.75rem;
    color: var(--ba-fg);
    display: flex;
    align-items: center;
    gap: 0.45rem;
}

.blog-article-v2 .ba-compare-card h3 i {
    width: auto;
    height: auto;
    background: none;
    border: none;
    color: var(--ba-muted);
    font-size: 0.875rem;
}

.blog-article-v2 .ba-compare-card ul {
    margin: 0;
    padding: 0;
    list-style: none;
    font-size: 0.875rem;
    line-height: 1.55;
    color: #525252;
}

.blog-article-v2 .ba-compare-card li {
    padding: 0.45rem 0;
    border-top: 1px solid var(--ba-border);
}

.blog-article-v2 .ba-compare-card li:first-child {
    border-top: none;
    padding-top: 0;
}

.blog-article-v2 .ba-compare-card .ba-k {
    display: inline;
    font-size: inherit;
    font-weight: 600;
    text-transform: none;
    letter-spacing: 0;
    color: var(--ba-fg);
    margin-right: 0.25rem;
}

.blog-article-v2 .ba-compare-card .ba-k::after {
    content: "：";
}

/* 清单 */
.blog-article-v2 .ba-checklist {
    list-style: none;
    margin: 0.75rem 0 0;
    padding: 0;
    background: none;
    border: none;
}

.blog-article-v2 .ba-checklist li {
    position: relative;
    padding-left: 1rem;
    margin-bottom: 0.65rem;
    font-size: 0.9375rem;
    line-height: 1.65;
    color: #404040;
}

.blog-article-v2 .ba-checklist li::before {
    content: "—";
    position: absolute;
    left: 0;
    color: var(--ba-muted);
    font-weight: 400;
}

/* CTA */
.blog-article-v2 .ba-cta {
    margin-top: 3rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--ba-fg);
}

.blog-article-v2 .ba-cta-inner {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    padding: 0;
    background: none;
    border: none;
}

@media (min-width: 640px) {
    .blog-article-v2 .ba-cta-inner {
        flex-direction: row;
        align-items: flex-start;
        justify-content: space-between;
        gap: 1.5rem;
    }
}

.blog-article-v2 .ba-cta-inner p {
    margin: 0;
    font-size: 0.9375rem;
    line-height: 1.65;
    color: #404040;
    max-width: 28rem;
}

.blog-article-v2 .ba-cta-inner p strong {
    color: var(--ba-fg);
}

.blog-article-v2 .ba-cta-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    flex-shrink: 0;
}

.blog-article-v2 .ba-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 0.5rem 0.9rem;
    border-radius: 0.25rem;
    text-decoration: none;
    border: 1px solid var(--ba-fg);
    transition: background 0.15s, color 0.15s;
}

.blog-article-v2 .ba-btn--primary {
    background: var(--ba-fg);
    color: #fff;
}

.blog-article-v2 .ba-btn--primary:hover {
    background: #404040;
    border-color: #404040;
}

.blog-article-v2 .ba-btn--ghost {
    background: #fff;
    color: var(--ba-fg);
}

.blog-article-v2 .ba-btn--ghost:hover {
    background: var(--ba-bg-sub);
}

/* 悬浮 */
.blog-article-v2 .ba-float {
    position: fixed;
    bottom: 1.25rem;
    right: 1.25rem;
    z-index: 40;
}

.blog-article-v2 .ba-float a {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--ba-fg);
    color: #fff;
    font-size: 0.8125rem;
    font-weight: 600;
    padding: 0.55rem 0.95rem;
    border-radius: 0.25rem;
    text-decoration: none;
    border: 1px solid var(--ba-fg);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
}

.blog-article-v2 .ba-float a:hover {
    background: #262626;
}

/* zh-apple 覆盖 */
body.zh-apple.blog-article-v2 {
    background-color: var(--ba-bg) !important;
    background-image: none !important;
    background-attachment: scroll !important;
}

body.zh-apple.blog-article-v2 main#blog-detail-page {
    padding-top: 4rem !important;
}

@media (min-width: 768px) {
    body.zh-apple.blog-article-v2 main#blog-detail-page {
        padding-top: 4.5rem !important;
    }
}