/* Blog article — upgraded detail layout */
.bd {
    background: #F5F7FA;
    color: #0F172A;
    font-family: Inter, system-ui, -apple-system, "Segoe UI", sans-serif;
    font-size: 15px;
    line-height: 1.5;
}
.bd * { box-sizing: border-box; }
.bd-progress {
    position: fixed;
    top: var(--shell-header-h, 68px);
    left: 0;
    height: 3px;
    width: 0;
    background: #F58220;
    z-index: 399;
    pointer-events: none;
}
.bd-w { max-width: 1200px; margin: 0 auto; padding: 0 24px 64px; }
.bd-hero {
    padding: 26px 0 18px;
    background: linear-gradient(180deg, #EAF1FD, #F5F7FA);
}
.bd-hero .bd-w { padding-bottom: 0; }
.bd-crumb { font-size: 13px; color: #5B6577; }
.bd-crumb a:hover { color: #1557BF; }
.bd-tag {
    display: inline-block;
    background: #fff;
    border: 1px solid #E3E8F0;
    color: #1557BF;
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.03em;
    margin: 10px 0;
}
.bd-tag:hover { color: #1557BF; border-color: #1557BF; }
.bd-hero h1 {
    margin: 0 0 12px;
    max-width: 860px;
    font-family: Inter, system-ui, sans-serif;
    font-size: 38px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.025em;
    color: #0F172A;
}
.bd-meta { display: flex; gap: 14px; flex-wrap: wrap; color: #5B6577; font-size: 14px; align-items: center; }
.bd-meta span + span::before { content: "·"; margin-right: 14px; }

.bd-lay {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 32px;
    padding: 8px 0 8px;
    align-items: start;
}
.bd-card {
    background: #fff;
    border: 1px solid #E3E8F0;
    border-radius: 20px;
    overflow: hidden;
}
.bd-cover {
    height: 380px;
    background: linear-gradient(135deg, #EAF1FD, #EEF2F8);
}
.bd-cover img { width: 100%; height: 380px; object-fit: cover; display: block; }
.bd-body { padding: 36px 44px 40px; }
.bd-prose { max-width: 820px; }
.bd-take {
    background: #EAF1FD;
    border: 1px solid #E3E8F0;
    border-radius: 14px;
    padding: 18px 22px;
    margin-bottom: 28px;
}
.bd-take b {
    display: block;
    margin-bottom: 6px;
    color: #1557BF;
    font-size: 13px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.bd-take p { margin: 0; font-size: 15px; color: #0F172A; line-height: 1.6; }
.bd-prose h2 {
    font-family: Inter, system-ui, sans-serif;
    font-size: 25px;
    font-weight: 800;
    letter-spacing: -0.015em;
    color: #0F172A;
    margin: 34px 0 10px;
    scroll-margin-top: 100px;
    line-height: 1.25;
}
.bd-prose h3 {
    font-family: Inter, system-ui, sans-serif;
    font-size: 20px;
    font-weight: 700;
    color: #0F172A;
    margin: 24px 0 8px;
}
.bd-prose p { font-size: 17px; line-height: 1.75; color: #0F172A; margin: 0 0 16px; }
.bd-prose a { color: #1557BF; font-weight: 600; border-bottom: 1px solid transparent; }
.bd-prose a:hover { color: #1557BF; border-bottom-color: #1557BF; }
.bd-prose ul, .bd-prose ol {
    list-style: none;
    padding: 0;
    margin: 16px 0 20px;
    display: grid;
    gap: 8px;
}
.bd-prose li {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    min-height: 48px;
    padding: 12px 16px;
    border: 1px solid #E3E8F0;
    border-radius: 12px;
    background: #F5F7FA;
    font-size: 16px;
    line-height: 1.5;
    color: #0F172A;
}
.bd-prose li::before {
    content: "";
    width: 8px;
    height: 8px;
    margin-top: 8px;
    border-radius: 50%;
    background: #1557BF;
    flex: none;
}
.bd-mobile-toc { display: none; margin-bottom: 20px; }
.bd-mobile-toc summary { font-weight: 700; cursor: pointer; color: #0F172A; }

.bd-inline {
    margin: 30px 0 0;
    background: linear-gradient(135deg, #0B1F4A, #16357C);
    color: #fff;
    border-radius: 16px;
    padding: 26px;
    display: flex;
    justify-content: space-between;
    gap: 16px;
    align-items: center;
    flex-wrap: wrap;
}
.bd-inline h3 {
    margin: 0 0 4px;
    font-family: Inter, system-ui, sans-serif;
    font-size: 20px;
    font-weight: 800;
    color: #fff;
}
.bd-inline p { margin: 0; color: #C7D3EE; font-size: 15px; }
.bd-share {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    padding-top: 20px;
    border-top: 1px solid #E3E8F0;
    margin-top: 30px;
    font-size: 14px;
    color: #5B6577;
}

.bd a.bd-btn,
.bd button.bd-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
    padding: 0 18px;
    border-radius: 10px;
    border: 1.5px solid #E3E8F0;
    background: #fff;
    font-family: inherit;
    font-weight: 600;
    font-size: 14px;
    color: #0F172A;
    cursor: pointer;
    text-decoration: none;
}
.bd a.bd-btn:hover,
.bd button.bd-btn:hover { border-color: #1557BF; color: #1557BF; }
.bd a.bd-btn--pri,
.bd button.bd-btn--pri,
.bd a.bd-btn--pri:hover,
.bd button.bd-btn--pri:hover {
    background: #1557BF;
    border-color: #1557BF;
    color: #fff;
}
.bd a.bd-btn--acc,
.bd button.bd-btn--acc,
.bd a.bd-btn--acc:hover,
.bd button.bd-btn--acc:hover {
    background: #F58220;
    border-color: #F58220;
    color: #1A1000;
    font-weight: 700;
}
.bd-share .bd-btn { height: 38px; padding: 0 14px; font-size: 13px; border-radius: 8px; }

.bd-side { position: sticky; top: 92px; display: grid; gap: 16px; align-content: start; }
.bd-box { background: #fff; border: 1px solid #E3E8F0; border-radius: 16px; padding: 20px; }
.bd-box h2 {
    margin: 0 0 12px;
    font-family: Inter, system-ui, sans-serif;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: #5B6577;
}
.bd-toc { display: grid; gap: 2px; }
.bd-toc a {
    padding: 8px 12px;
    border-left: 3px solid #E3E8F0;
    font-size: 14px;
    color: #5B6577;
    font-weight: 500;
}
.bd-toc a:hover { color: #1557BF; }
.bd-toc a.is-on {
    border-color: #1557BF;
    color: #1557BF;
    font-weight: 700;
    background: #EAF1FD;
    border-radius: 0 8px 8px 0;
}
.bd-links { display: grid; gap: 8px; }
.bd-links a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 14px;
    border: 1px solid #E3E8F0;
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    color: #0F172A;
}
.bd-links a:hover { border-color: #1557BF; color: #1557BF; }
.bd-guide {
    background: linear-gradient(135deg, #0B1F4A, #16357C);
    color: #fff;
    border-radius: 16px;
    padding: 22px;
}
.bd-guide h2 {
    color: #fff;
    text-transform: none;
    letter-spacing: 0;
    font-size: 18px;
    font-weight: 800;
    margin: 0 0 6px;
}
.bd-guide p { color: #C7D3EE; font-size: 14px; margin: 0 0 14px; }
.bd-guide .bd-btn { width: 100%; }

.bd-pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 20px; }
.bd-pager a {
    border: 1px solid #E3E8F0;
    background: #fff;
    border-radius: 14px;
    padding: 16px 20px;
    display: block;
    color: #0F172A;
}
.bd-pager a:hover { border-color: #1557BF; color: #0F172A; }
.bd-pager small { color: #5B6577; display: block; margin-bottom: 4px; font-size: 13px; }
.bd-pager b { font-size: 15px; line-height: 1.4; }
.bd-pager a.is-next { text-align: right; }
.bd-rel { padding: 32px 0 8px; }
.bd-rel h2 {
    font-family: Inter, system-ui, sans-serif;
    font-size: 26px;
    font-weight: 800;
    margin: 0 0 16px;
    letter-spacing: -0.02em;
    color: #0F172A;
}
.bd-rel-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.bd-rel-card {
    background: #fff;
    border: 1px solid #E3E8F0;
    border-radius: 14px;
    overflow: hidden;
    display: block;
    color: #0F172A;
    transition: 0.2s;
}
.bd-rel-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(11, 31, 74, 0.12);
    border-color: #1557BF;
    color: #0F172A;
}
.bd-rel-card img { width: 100%; height: 130px; object-fit: cover; display: block; background: #EEF2F8; }
.bd-rel-card div { padding: 14px; }
.bd-rel-card small { color: #5B6577; display: block; margin-bottom: 4px; }
.bd-rel-card b { font-size: 15px; line-height: 1.4; display: block; }

.bd-cta {
    background: #1557BF;
    color: #fff;
    border-radius: 20px;
    padding: 36px;
    text-align: center;
    margin-top: 36px;
}
.bd-cta h2 {
    margin: 0 0 6px;
    font-family: Inter, system-ui, sans-serif;
    font-size: 28px;
    font-weight: 800;
    color: #fff;
}
.bd-cta p { margin: 0 0 20px; color: rgba(255, 255, 255, 0.9); }
.bd-cta-row { display: flex; gap: 12px; justify-content: center; flex-wrap: wrap; }
.bd-cta .bd-btn:not(.bd-btn--acc),
.bd-cta .bd-btn:not(.bd-btn--acc):hover {
    color: #0F172A;
    background: #fff;
    border-color: #fff;
}

@media (max-width: 1000px) {
    .bd-lay { grid-template-columns: 1fr; }
    .bd-side { position: static; }
    .bd-side-toc { display: none; }
    .bd-mobile-toc { display: block; }
    .bd-rel-grid { grid-template-columns: 1fr 1fr; }
    .bd-body { padding: 26px 22px; }
    .bd-cover, .bd-cover img { height: 260px; }
}
@media (max-width: 640px) {
    .bd-w { padding: 0 14px 48px; }
    .bd-hero h1 { font-size: 28px; }
    .bd-rel-grid, .bd-pager { grid-template-columns: 1fr; }
    .bd-pager a.is-next { text-align: left; }
    .bd-cta { padding: 24px; }
    .bd-cta h2 { font-size: 24px; }
}