.blog-shell {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr);
    gap: 52px;
    max-width: 1180px;
    margin: 0 auto;
    padding: 46px 36px 80px;
}

.blog-sidebar {
    position: sticky;
    top: 88px;
    align-self: start;
    padding-right: 22px;
    border-right: 1px solid var(--border);
}

.blog-sidebar-label,
.blog-eyebrow {
    font-family: 'Arial Rounded MT Bold', Verdana, Arial, sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.11em;
    font-weight: 700;
}

.blog-sidebar-label {
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 0.72rem;
}

.blog-fold {
    border-bottom: 1px solid #e8e8e8;
}

.blog-fold:first-of-type {
    border-top: 1px solid #e8e8e8;
}

.blog-fold summary {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    padding: 14px 2px;
    color: var(--strong);
    font-family: 'Arial Rounded MT Bold', Verdana, Arial, sans-serif;
    font-size: 0.92rem;
    font-weight: 700;
    line-height: 1.35;
    list-style: none;
    cursor: pointer;
    user-select: none;
}

.blog-fold summary::-webkit-details-marker {
    display: none;
}

.blog-fold summary:hover {
    color: var(--accent);
}

.blog-fold summary:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
    border-radius: 2px;
}

.blog-chevron {
    color: var(--muted);
    font-family: Arial, sans-serif;
    font-size: 1.35rem;
    font-weight: 400;
    line-height: 1;
    transform: rotate(0deg);
    transition: transform 0.2s ease, color 0.2s ease;
}

.blog-fold[open] .blog-chevron {
    color: var(--accent);
    transform: rotate(90deg);
}

.blog-post-links {
    margin: -2px 0 14px;
    padding: 0 0 0 13px;
    list-style: none;
    border-left: 2px solid #e5ecfa;
}

.blog-post-links li {
    margin: 0;
}

.blog-post-links a,
.blog-placeholder {
    display: block;
    padding: 6px 10px;
    font-size: 0.9rem;
    line-height: 1.4;
}

.blog-post-links a {
    border-radius: 4px;
}

.blog-post-links a:hover,
.blog-post-links a:focus-visible {
    background: var(--feature-bg);
    text-decoration: none;
}

.blog-post-links a:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 1px;
}

.blog-placeholder {
    color: var(--muted);
    font-style: italic;
}

.blog-content {
    min-width: 0;
    max-width: 800px;
    font-family: Georgia, 'Noto Serif SC', 'Songti SC', SimSun, serif;
}

.blog-header {
    position: relative;
    padding: 8px 0 34px;
    border-bottom: 1px solid var(--border);
}

.blog-header::after {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 72px;
    height: 3px;
    background: var(--accent);
    content: '';
}

.blog-eyebrow {
    margin: 0 0 12px;
    color: var(--accent);
    font-size: 0.72rem;
}

.blog-header h1 {
    margin: 0 0 16px;
    color: var(--strong);
    font-size: clamp(2.2rem, 5vw, 3.35rem);
    line-height: 1.12;
    letter-spacing: 0.02em;
}

.blog-header > p:last-child {
    max-width: 610px;
    margin: 0;
    color: #555;
    font-size: 1.05rem;
    letter-spacing: 0.04em;
}

.blog-intro {
    padding-top: 32px;
}

.blog-lead {
    max-width: 730px;
    margin: 0 0 34px;
    color: #3f3f3f;
    font-size: 1.06rem;
    line-height: 1.95;
}

.blog-note {
    display: grid;
    grid-template-columns: 52px minmax(0, 1fr);
    gap: 24px;
    margin: 0;
    padding: 36px 0 40px;
    border-top: 1px solid var(--border);
}

.blog-note > div:last-child {
    max-width: 640px;
}

.blog-note-number {
    color: var(--accent);
    font-family: 'Arial Rounded MT Bold', Verdana, Arial, sans-serif;
    font-size: 0.88rem;
    font-variant-numeric: tabular-nums;
    font-weight: 700;
    letter-spacing: 0.1em;
    line-height: 1.4;
}

.blog-note-label,
.blog-closing-kicker {
    font-family: 'Arial Rounded MT Bold', Verdana, Arial, sans-serif;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.blog-note-label {
    margin: 0 0 9px;
    color: var(--accent);
    font-size: 0.7rem;
}

.blog-note h2 {
    margin: 0 0 16px;
    padding: 0;
    border: 0;
    color: var(--strong);
    font-size: clamp(1.25rem, 2vw, 1.45rem);
    line-height: 1.45;
    letter-spacing: 0.01em;
}

.blog-note p:not(.blog-note-label) {
    margin: 0 0 14px;
    color: var(--text);
    font-size: 1rem;
    line-height: 1.9;
}

.blog-note p:last-child {
    margin-bottom: 0;
}

.blog-closing {
    margin: 10px 0 0 76px;
    max-width: 640px;
    padding: 24px 0 0;
    border-top: 1px solid var(--strong);
}

.blog-closing-kicker {
    margin: 0 0 10px;
    color: var(--accent);
    font-size: 0.7rem;
}

.blog-closing p:last-child {
    margin: 0;
    color: var(--text);
    font-size: 0.98rem;
    line-height: 1.9;
}

@media (max-width: 720px) {
    .blog-shell {
        display: block;
        padding: 30px 20px 50px;
    }

    .blog-sidebar {
        position: static;
        margin-bottom: 42px;
        padding: 0;
        border-right: 0;
    }

    .blog-content {
        max-width: none;
    }

    .blog-header h1 {
        font-size: 2.35rem;
    }

    .blog-intro {
        padding-top: 26px;
    }

    .blog-lead {
        font-size: 1rem;
        line-height: 1.85;
    }

    .blog-note {
        grid-template-columns: 1fr;
        gap: 7px;
        padding: 28px 0 32px;
    }

    .blog-note-number {
        font-size: 0.72rem;
    }

    .blog-note h2 {
        font-size: 1.2rem;
    }

    .blog-closing {
        margin: 6px 0 0;
        padding: 21px 0 0;
    }
}