.tech-article {
    --article-ink: #242423;
    --article-muted: #686663;
    --article-line: #ded9d5;
    --article-note: #fff1eb;
    background: #fbfaf8;
    color: var(--article-ink);
}

.article-shell { width: min(calc(100% - 48px), 1160px); margin: 0 auto; }
.article-hero { padding: 132px 0 54px; border-bottom: 1px solid var(--article-line); background: #fff; }
.article-breadcrumb { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 28px; color: var(--article-muted); font-size: 13px; }
.article-breadcrumb a { text-decoration: underline; text-underline-offset: 3px; }
.article-breadcrumb a:hover { color: var(--primary); }
.article-label { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-size: 13px; font-weight: 800; letter-spacing: .04em; }
.article-label::before { content: ""; width: 24px; height: 2px; background: currentColor; }
.article-hero h1 { max-width: 920px; margin: 16px 0 20px; font-size: clamp(40px, 6.4vw, 76px); line-height: 1.06; letter-spacing: -.055em; text-wrap: balance; }
.article-deck { max-width: 780px; margin: 0; color: var(--article-muted); font-size: clamp(18px, 2vw, 22px); line-height: 1.75; }
.article-meta { display: flex; flex-wrap: wrap; gap: 9px 22px; margin-top: 28px; color: var(--article-muted); font-size: 13px; }
.article-meta span { display: inline-flex; align-items: center; gap: 7px; }
.article-meta span::before { content: ""; width: 5px; height: 5px; border-radius: 50%; background: var(--primary-container); }

.article-figure { margin: 42px 0 0; }
.article-figure-frame { overflow: hidden; border: 1px solid var(--article-line); border-radius: 20px; background: #fff; }
.article-figure img { width: 100%; }
.article-figure figcaption { display: flex; justify-content: space-between; gap: 20px; margin-top: 12px; color: var(--article-muted); font-size: 12px; line-height: 1.6; }

.article-layout { display: grid; grid-template-columns: 190px minmax(0, 760px); justify-content: center; gap: 66px; padding: 70px 0 96px; }
.article-toc { align-self: start; position: sticky; top: 112px; padding-top: 7px; }
.article-toc strong { display: block; margin-bottom: 12px; font-size: 12px; letter-spacing: .08em; text-transform: uppercase; }
.article-toc a { display: block; padding: 8px 0; border-bottom: 1px solid var(--article-line); color: var(--article-muted); font-size: 13px; line-height: 1.45; }
.article-toc a:hover { color: var(--primary); }

.article-body { min-width: 0; font-size: 17px; line-height: 1.92; }
.article-body > p:first-child { margin-top: 0; font-size: 20px; line-height: 1.8; color: var(--article-ink); }
.article-body p { margin: 0 0 23px; color: #454442; }
.article-body h2 { margin: 74px 0 24px; padding-top: 10px; font-size: clamp(29px, 4vw, 42px); line-height: 1.22; letter-spacing: -.04em; scroll-margin-top: 112px; }
.article-body h3 { margin: 38px 0 12px; font-size: 21px; line-height: 1.4; letter-spacing: -.02em; }
.article-body strong { color: var(--article-ink); }
.article-body a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; }
.article-body ul { margin: 0 0 26px; padding-left: 1.25em; }
.article-body li { margin-bottom: 9px; color: #454442; }

.editor-note { margin: 34px 0; padding: 22px 24px; border-left: 4px solid var(--primary-container); background: var(--article-note); color: #4c2d24; font-size: 16px; line-height: 1.8; }
.editor-note strong { display: block; margin-bottom: 4px; }

.architecture-path { display: grid; grid-template-columns: 1fr auto 1fr auto 1.15fr; align-items: stretch; gap: 10px; margin: 30px 0 38px; }
.path-node { display: grid; place-items: center; min-height: 112px; padding: 16px; border: 1px solid var(--article-line); border-radius: 14px; background: #fff; text-align: center; }
.path-node small { display: block; margin-bottom: 5px; color: var(--article-muted); font-size: 11px; }
.path-node b { font-size: 15px; line-height: 1.45; }
.path-node.vision { border-color: rgba(168,48,15,.34); background: #fff9f6; }
.path-node.brain { background: var(--article-ink); color: #fff; }
.path-arrow { display: grid; place-items: center; color: var(--primary); font-size: 22px; }

.spec-table { width: 100%; margin: 26px 0 36px; border-collapse: collapse; font-size: 14px; line-height: 1.55; }
.spec-table th, .spec-table td { padding: 14px 12px; border-bottom: 1px solid var(--article-line); text-align: left; vertical-align: top; }
.spec-table th { color: var(--article-muted); font-size: 12px; letter-spacing: .02em; }
.spec-table td:first-child { width: 25%; font-weight: 700; color: var(--article-ink); }

.field-log { margin: 28px 0 38px; border-top: 2px solid var(--article-ink); }
.field-record { display: grid; grid-template-columns: 156px 1fr; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--article-line); }
.field-number { font-family: 'Manrope', sans-serif; font-size: 31px; font-weight: 900; line-height: 1.08; letter-spacing: -.045em; color: var(--primary); }
.field-number small { display: block; margin-top: 7px; color: var(--article-muted); font-family: 'Inter', sans-serif; font-size: 11px; font-weight: 600; letter-spacing: .02em; }
.field-record h3 { margin: 0 0 8px; font-size: 19px; }
.field-record p { margin: 0 0 10px; font-size: 15px; line-height: 1.75; }
.field-record a { font-size: 13px; font-weight: 700; }

.route-list { margin: 30px 0 42px; padding: 0; list-style: none; border-top: 1px solid var(--article-line); }
.route-list li { display: grid; grid-template-columns: 160px 1fr; gap: 24px; margin: 0; padding: 20px 0; border-bottom: 1px solid var(--article-line); }
.route-list b { font-size: 15px; }
.route-list span { color: #4f4d4a; font-size: 15px; line-height: 1.7; }

.source-details { margin-top: 30px; padding: 20px 22px; border: 1px solid var(--article-line); border-radius: 14px; background: #fff; }
.source-details summary { cursor: pointer; font-weight: 800; }
.source-details ol { margin: 18px 0 0; padding-left: 1.3em; }
.source-details li { margin-bottom: 10px; color: var(--article-muted); font-size: 13px; line-height: 1.65; }
.article-back { margin-top: 64px; padding-top: 28px; border-top: 2px solid var(--article-ink); }
.article-back a { font-size: 14px; font-weight: 800; }

@media (max-width: 900px) {
    .article-layout { grid-template-columns: minmax(0, 760px); gap: 0; }
    .article-toc { display: none; }
}

@media (max-width: 640px) {
    .article-shell { width: min(calc(100% - 36px), 1160px); }
    .article-hero { padding-top: 102px; padding-bottom: 40px; }
    .article-hero h1 { font-size: clamp(38px, 12vw, 54px); }
    .article-deck { font-size: 17px; }
    .article-figure figcaption { display: block; }
    .article-layout { padding: 48px 0 72px; }
    .article-body { font-size: 16px; line-height: 1.88; }
    .article-body > p:first-child { font-size: 18px; }
    .article-body h2 { margin-top: 60px; }
    .architecture-path { grid-template-columns: 1fr; }
    .path-arrow { transform: rotate(90deg); min-height: 20px; }
    .field-record { grid-template-columns: 1fr; gap: 10px; }
    .field-number small { display: inline; margin-left: 8px; }
    .route-list li { grid-template-columns: 1fr; gap: 4px; }
    .spec-table { display: block; overflow-x: auto; white-space: nowrap; }
}