.b-hero {
    overflow-x: clip;
    padding: calc(var(--nav-h) + clamp(28px, 5vh, 56px)) 0 clamp(64px, 8vw, 104px);
    background: radial-gradient(900px 560px at 80% 20%, #FFFFFF 0%, rgba(255, 255, 255, 0) 70%), var(--mist);
}
.b-hero-row { margin-top: 22px; display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 32px clamp(40px, 6vw, 96px); align-items: end; }
.b-title { font-size: clamp(44px, 6vw, 84px); line-height: .98; letter-spacing: -.045em; font-weight: 600; }
.b-lead { margin-top: 20px; max-width: 32em; font-size: clamp(18px, 1.5vw, 21px); line-height: 1.55; color: var(--ink-2); }
.b-topics { display: grid; gap: 10px; }
.b-topics li { display: flex; align-items: center; gap: 14px; font-size: 15px; font-weight: 500; color: var(--ink-2); }
.b-topics .icon { width: 44px; height: 44px; border-radius: 13px; }
.b-topics .ic { width: 28px; height: 28px; }

.blead { margin-top: clamp(40px, 5vw, 64px); }
.bcard-link { display: block; }
.bcard-art { display: grid; }
.bcard-body { display: flex; flex-direction: column; }
.bcard-body .post-meta { margin-top: 22px; flex-wrap: wrap; }
.bcard-title { margin-top: 8px; font-size: 21px; line-height: 1.25; letter-spacing: -.022em; font-weight: 600; text-wrap: balance; transition: color .25s; }
.bcard-excerpt { margin-top: 10px; font-size: 15px; line-height: 1.6; color: var(--ink-2); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.bcard-link:hover .bcard-title { color: var(--cobalt); }
.bcard-link:hover .post-art svg { transform: scale(1.035) translateY(-2px); }
.bcard-lead .bcard-link {
    display: grid;
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(28px, 4vw, 56px);
    align-items: center;
    padding: clamp(14px, 1.6vw, 20px);
    border-radius: 30px;
    background: #FFFFFF;
    box-shadow: 0 0 0 1px rgba(14, 26, 43, .05), 0 30px 70px -40px rgba(14, 26, 43, .35);
    transition: box-shadow .4s var(--ease-out), transform .4s var(--ease-out);
}
.bcard-lead .bcard-link:hover { transform: translateY(-2px); box-shadow: 0 0 0 1px rgba(14, 26, 43, .06), 0 40px 80px -40px rgba(14, 26, 43, .42); }
.bcard-lead .bcard-art { aspect-ratio: 16 / 10; border-radius: 22px; }
.bcard-lead .bcard-body { padding-right: clamp(8px, 2vw, 28px); }
.bcard-lead .post-meta { margin-top: 0; }
.bcard-lead .bcard-title { margin-top: 12px; font-size: clamp(26px, 2.8vw, 38px); line-height: 1.1; letter-spacing: -.032em; }
.bcard-lead .bcard-excerpt { margin-top: 14px; font-size: 17px; -webkit-line-clamp: 4; }
.bcard-go { margin-top: 22px; font-size: 16px; font-weight: 600; color: var(--cobalt); }

.b-all, .a-related { padding-block: clamp(72px, 9vw, 128px); }
.b-all-head { display: flex; align-items: baseline; justify-content: space-between; gap: 24px; }
.b-all-head h2 { font-size: clamp(32px, 3.6vw, 48px); letter-spacing: -.035em; font-weight: 600; line-height: 1.05; }
.b-all-head p { font-size: 15px; color: var(--ink-3); }
.bgrid { margin-top: clamp(36px, 4vw, 56px); display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 56px clamp(24px, 3vw, 40px); }
.closing-art { display: grid; place-items: center; }
.closing-art .icon { width: 84px; height: 84px; border-radius: 26px; }
.closing-art .ic { width: 54px; height: 54px; }

.a-progress { position: fixed; top: var(--nav-h); left: 0; right: 0; z-index: 49; height: 2px; pointer-events: none; }
.a-progress span { display: block; height: 100%; background: var(--cobalt); transform-origin: 0 50%; transform: scaleX(var(--p, 0)); }
.a-head {
    overflow-x: clip;
    padding: calc(var(--nav-h) + clamp(24px, 4vh, 48px)) 0 clamp(48px, 6vw, 80px);
    background: radial-gradient(900px 560px at 85% 30%, #FFFFFF 0%, rgba(255, 255, 255, 0) 70%), var(--mist);
}
.a-head-grid { display: grid; grid-template-columns: minmax(0, 7fr) minmax(0, 5fr); gap: 40px clamp(40px, 6vw, 88px); align-items: center; }
.a-meta { margin-top: 24px; display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 14px; color: var(--ink-3); }
.a-cat { color: var(--cobalt); font-weight: 600; }
.a-title { margin-top: 14px; font-size: clamp(36px, 4.6vw, 64px); line-height: 1.03; letter-spacing: -.04em; font-weight: 600; text-wrap: balance; }
.a-dek { margin-top: 20px; max-width: 34em; font-size: clamp(18px, 1.5vw, 21px); line-height: 1.55; color: var(--ink-2); }
.a-byline { margin-top: 28px; display: flex; align-items: center; gap: 12px; font-size: 14px; }
.a-byline img { width: 36px; height: 36px; padding: 4px; border-radius: 50%; background: #FFFFFF; box-shadow: 0 0 0 1px rgba(14, 26, 43, .08); }
.a-byline > span { display: flex; flex-direction: column; line-height: 1.35; }
.a-byline strong { font-weight: 600; }
.a-byline > span > span { color: var(--ink-3); }
.a-head-art { aspect-ratio: 5 / 4; border-radius: 28px; box-shadow: 0 0 0 1px rgba(14, 26, 43, .05), 0 40px 80px -46px rgba(14, 26, 43, .4); background: radial-gradient(120% 90% at 50% 0%, #FFFFFF 0%, #F7F8FA 80%); }

.a-body {
    display: grid;
    grid-template-columns: minmax(0, 3.2fr) minmax(0, 8fr);
    gap: 48px clamp(40px, 6vw, 96px);
    padding-top: clamp(48px, 6vw, 88px);
    padding-bottom: clamp(56px, 7vw, 96px);
    align-items: start;
}
.a-toc { position: sticky; top: calc(var(--nav-h) + 32px); }
.a-toc-box summary { list-style: none; font-size: 13px; font-weight: 600; color: var(--ink-3); cursor: default; }
.a-toc-box summary::-webkit-details-marker { display: none; }
.a-toc ol { margin-top: 14px; border-left: 1px solid var(--line); }
.a-toc li a {
    display: block;
    margin-left: -1px;
    padding: 7px 0 7px 16px;
    border-left: 2px solid transparent;
    font-size: 14px;
    line-height: 1.4;
    color: var(--ink-2);
    transition: color .2s, border-color .3s;
}
.a-toc li a:hover { color: var(--ink); }
.a-toc li a.is-current { color: var(--cobalt); border-left-color: var(--cobalt); font-weight: 600; }
.a-toc-cta { margin-top: 32px; padding: 18px; border-radius: 18px; background: var(--mist); }
.a-toc-cta p { font-size: 14px; line-height: 1.45; color: var(--ink-2); margin-bottom: 12px; }

.a-prose { max-width: 42rem; font-size: 18px; line-height: 1.75; color: var(--ink-2); }
.a-prose > h2 {
    margin-top: 64px;
    font-size: clamp(26px, 2.4vw, 32px);
    line-height: 1.15;
    letter-spacing: -.03em;
    font-weight: 600;
    color: var(--ink);
    scroll-margin-top: calc(var(--nav-h) + 24px);
}
.a-prose > h2:first-child { margin-top: 0; }
.a-prose h3 { margin-top: 36px; font-size: 21px; line-height: 1.3; letter-spacing: -.018em; font-weight: 600; color: var(--ink); }
.a-prose h4 { margin-top: 28px; font-size: 18px; font-weight: 600; color: var(--ink); }
.a-prose p { margin-top: 18px; }
.a-prose h2 + p, .a-prose h3 + p, .a-prose h4 + p { margin-top: 14px; }
.a-prose strong { color: var(--ink); font-weight: 600; }
.a-prose a { color: var(--cobalt); text-decoration: underline; text-decoration-color: rgba(35, 70, 232, .3); text-underline-offset: 3px; }
.a-prose a:hover { text-decoration-color: currentColor; }
.a-prose ul, .a-prose ol { margin-top: 18px; padding: 0; }
.a-prose ul li { position: relative; margin-top: 10px; padding-left: 28px; }
.a-prose ul li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: .7em;
    width: 12px;
    height: 8px;
    border-radius: 50%;
    border: 1.5px solid var(--cobalt);
    background: var(--cobalt-wash);
}
.a-prose ol { counter-reset: li; }
.a-prose ol li { position: relative; margin-top: 10px; padding-left: 36px; counter-increment: li; }
.a-prose ol li::before {
    content: counter(li);
    position: absolute;
    left: 0;
    top: .3em;
    display: grid;
    place-items: center;
    width: 24px;
    height: 17px;
    border-radius: 50%;
    background: var(--ink);
    color: #FFFFFF;
    font-size: 11px;
    font-weight: 600;
    line-height: 1;
}
.table-wrap { margin-top: 24px; overflow-x: auto; border-radius: 18px; box-shadow: 0 0 0 1px var(--line); }
.a-prose table { width: 100%; min-width: 520px; border-collapse: collapse; font-size: 15px; line-height: 1.5; }
.a-prose th { padding: 14px 16px; text-align: left; font-weight: 600; color: var(--ink); background: var(--mist); }
.a-prose td { padding: 13px 16px; border-top: 1px solid var(--line); vertical-align: top; }
.a-prose tr:hover td { background: #FAFBFC; }

.a-cta {
    margin: 48px 0 8px;
    display: grid;
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 24px;
    align-items: center;
    padding: 20px;
    border-radius: 24px;
    background: var(--mist);
}
.a-cta-art { display: flex; align-items: center; justify-content: center; height: 150px; padding: 14px; border-radius: 16px; background: #FFFFFF; }
.a-cta-art svg { height: 100%; width: auto; overflow: visible; }
.a-cta-title { margin: 0; font-size: 22px; font-weight: 600; letter-spacing: -.02em; color: var(--ink); }
.a-prose .a-cta-text { margin-top: 6px; font-size: 16px; line-height: 1.55; }
.a-cta .btn { margin-top: 16px; text-decoration: none; color: #FFFFFF; }

.a-foot { margin-top: 56px; padding-top: 24px; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 16px; }
.a-tags { display: flex; flex-wrap: wrap; gap: 8px; margin: 0; }
.a-prose .a-tags li { margin: 0; padding: 6px 12px; border-radius: 999px; background: var(--mist); font-size: 13px; color: var(--ink-2); line-height: 1.3; }
.a-prose .a-tags li::before { content: none; }
.a-share { display: flex; align-items: center; gap: 10px; }
.a-copied { font-size: 13px; color: var(--cobalt); font-weight: 500; }
.a-related { background: var(--mist); }

@media (max-width: 1080px) {
    .bgrid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 900px) {
    .b-hero-row, .bcard-lead .bcard-link, .a-head-grid, .a-body { grid-template-columns: minmax(0, 1fr); }
    .b-topics { grid-template-columns: repeat(3, minmax(0, 1fr)); }
    .b-topics li { flex-direction: column; align-items: flex-start; gap: 8px; font-size: 13px; }
    .bcard-lead .bcard-body { padding: 0 6px 10px; }
    .a-head-art { aspect-ratio: 16 / 9; }
    .a-toc { position: static; }
    .a-toc-box { padding: 14px 18px; border-radius: 16px; background: var(--mist); }
    .a-toc-box summary { display: flex; align-items: center; justify-content: space-between; cursor: pointer; font-size: 15px; color: var(--ink); }
    .a-toc-box summary::after { content: ""; width: 8px; height: 8px; margin-right: 4px; border-right: 1.8px solid var(--ink-2); border-bottom: 1.8px solid var(--ink-2); transform: translateY(-2px) rotate(45deg); transition: transform .3s var(--ease-out); }
    .a-toc-box[open] summary::after { transform: translateY(2px) rotate(-135deg); }
    .a-toc ol { border: 0; }
    .a-toc li a { padding-left: 0; border: 0; }
    .a-toc-cta { display: none; }
}
@media (max-width: 640px) {
    .bgrid { grid-template-columns: minmax(0, 1fr); gap: 44px; }
    .crumbs li[aria-current] { display: none; }
    .a-prose { font-size: 17px; }
    .a-cta { grid-template-columns: minmax(0, 1fr); }
    .a-cta-art { height: 120px; }
}