:root {
    --main-text-color: #333;
    --sub-text-color: #666;
    --accent-color: #f7e031;
    --ink: #1c1c1c;
    --paper: #ffffff;
    --warm-paper: #f7f5ef;
    --line: #e7e1d5;
    --muted: #8b8476;
    --header-height: 60px;
    --button-radius: 16px;
    --quote-paper: #efede6;
    --quote-line: #d8d1c4;
    --code-paper: #151515;
    --code-ink: #f8f8f4;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--main-text-color);
    font-family: "Noto Sans JP", sans-serif;
    line-height: 1.85;
    -webkit-font-smoothing: antialiased;
}

body.menu-open {
    overflow: hidden;
}

a {
    color: inherit;
}

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 4px;
}

.column-header {
    position: fixed;
    inset: 0 0 auto;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    z-index: 100;
}

/* When logged in, drop the fixed header below the WordPress admin bar so the
   logo isn't clipped and no white gap appears beneath the header. */
.admin-bar .column-header {
    top: 32px;
}

@media screen and (max-width: 782px) {
    .admin-bar .column-header {
        top: 46px;
    }
}

.column-header-inner {
    width: min(1120px, calc(100% - 48px));
    height: 100%;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.column-logo {
    margin: 0;
    line-height: 0;
}

.column-logo-link,
.column-footer-logo {
    display: inline-block;
    line-height: 0;
}

.column-logo-img {
    height: 28px;
    width: auto;
}

.column-nav {
    display: flex;
    align-items: center;
    gap: 32px;
}

.column-nav-list {
    display: flex;
    align-items: center;
    gap: 28px;
    list-style: none;
    margin: 0;
    padding: 0;
}

.column-nav-list a,
.column-contact-link {
    text-decoration: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.column-contact-link {
    padding: 8px 22px;
    border-radius: var(--button-radius);
    background: var(--ink);
    color: #fff;
}

.column-menu-button {
    display: none;
    width: 36px;
    height: 36px;
    padding: 0;
    border: 0;
    background: transparent;
    cursor: pointer;
}

.column-menu-button span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 5px auto;
    background: var(--ink);
}

.column-mobile-menu {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 1px solid var(--line);
    z-index: 99;
}

.column-mobile-menu.is-open {
    display: block;
}

.column-mobile-menu ul {
    list-style: none;
    margin: 0;
    padding: 0;
}

.column-mobile-menu-list,
.column-footer-menu-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.column-mobile-menu a {
    display: block;
    padding: 17px 24px;
    border-bottom: 1px solid #f1eee7;
    text-decoration: none;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.14em;
}

.column-main {
    padding-top: var(--header-height);
}

.column-section {
    padding: 104px 0;
}

.column-section--warm {
    background: var(--warm-paper);
}

.column-section--index {
    padding-top: 92px;
    background: #fff;
}

.column-container {
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
}

.column-container--narrow {
    width: min(760px, calc(100% - 48px));
    margin: 0 auto;
}

.column-kicker {
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.26em;
    text-transform: uppercase;
}

.column-hero {
    position: relative;
    padding: 64px 0 84px;
    background: linear-gradient(180deg, #f7f5ef 0%, #fff 100%);
}

.column-hero-head {
    margin-bottom: 46px;
}

.column-hero-title-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(360px, 420px);
    gap: 48px;
    align-items: start;
}

.column-title {
    max-width: none;
    margin: 0;
    color: var(--ink);
    font-size: clamp(46px, 6vw, 82px);
    font-weight: 900;
    line-height: 1.12;
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.column-lead {
    max-width: none;
    margin: 0;
    color: #555;
    font-size: 13px;
    line-height: 2;
    letter-spacing: 0.04em;
}

.column-note-panel {
    border-left: 1px solid var(--line);
    padding-left: 34px;
}

.hero-article-panel {
    border-left: 0;
    padding-left: 0;
}

.hero-panel-label {
    margin: 0 0 18px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.22em;
}

.hero-magazine-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.48fr) minmax(320px, 0.52fr);
    gap: 28px;
    align-items: stretch;
}

.hero-main-story {
    display: grid;
    grid-template-columns: minmax(0, 0.58fr) minmax(300px, 0.42fr);
    min-height: 420px;
    border: 1px solid var(--line);
    background: #fff;
    color: inherit;
    text-decoration: none;
}

.hero-main-media,
.hero-story-thumb {
    margin: 0;
    overflow: hidden;
    background: #f3f0e8;
}

.hero-main-media img,
.hero-story-thumb img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-main-body {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 34px 34px 36px;
}

.hero-story-meta,
.hero-author-line {
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.hero-story-meta {
    margin: 0 0 12px;
}

.hero-main-title {
    margin: 0;
    color: var(--ink);
    font-size: clamp(28px, 2.8vw, 42px);
    font-weight: 900;
    line-height: 1.42;
    letter-spacing: 0.05em;
}

.hero-main-text {
    margin: 18px 0 0;
    color: var(--sub-text-color);
    font-size: 14px;
    line-height: 1.9;
    letter-spacing: 0.04em;
}

.hero-author-line {
    margin: 28px 0 0;
}

.hero-story-list {
    display: grid;
    gap: 16px;
}

.hero-story-card {
    display: grid;
    grid-template-columns: 116px minmax(0, 1fr);
    grid-template-rows: auto 1fr;
    gap: 8px 18px;
    align-items: start;
    min-height: 142px;
    padding: 18px;
    border: 1px solid var(--line);
    background: #fff;
    color: inherit;
    text-decoration: none;
}

.hero-story-thumb {
    grid-row: 1 / span 2;
    height: 104px;
}

.hero-story-card--text {
    display: flex;
    min-height: 126px;
    flex-direction: column;
    justify-content: center;
}

.hero-story-title {
    color: var(--ink);
    font-size: 15px;
    font-weight: 900;
    line-height: 1.7;
    letter-spacing: 0.05em;
}

.column-note-title {
    margin: 0 0 14px;
    color: var(--ink);
    font-size: 18px;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.column-note-text {
    margin: 0 0 24px;
    color: var(--sub-text-color);
    font-size: 14px;
    line-height: 2;
    letter-spacing: 0.04em;
}

.column-text-link,
.column-arrow-link {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    max-width: 100%;
    flex-wrap: wrap;
    text-decoration: none;
    color: var(--ink);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.16em;
}

.column-link-circle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 999px;
    background: var(--accent-color);
    font-size: 15px;
    transition: transform 0.22s ease, box-shadow 0.22s ease;
}

.column-arrow-link:hover .column-link-circle,
.column-arrow-link:focus-visible .column-link-circle {
    transform: translateX(4px);
    box-shadow: 0 10px 20px rgba(247, 224, 49, 0.28);
}

.column-section-heading {
    display: grid;
    grid-template-columns: minmax(0, 0.7fr) minmax(280px, 0.3fr);
    gap: 56px;
    align-items: end;
    margin-bottom: 46px;
}

.column-heading {
    margin: 0;
    color: var(--ink);
    font-size: clamp(28px, 3.2vw, 42px);
    font-weight: 900;
    line-height: 1.32;
    letter-spacing: 0.08em;
}

.column-heading-text {
    margin: 0;
    color: var(--sub-text-color);
    font-size: 14px;
    line-height: 2;
    letter-spacing: 0.04em;
}

.hub-grid {
    display: grid;
    grid-template-columns: minmax(0, 1.28fr) minmax(280px, 0.72fr);
    gap: 28px;
}

.hub-card,
.article-card,
.path-card,
.series-card,
.article-note-box,
.article-author,
.article-next-box,
.article-cta {
    background: #fff;
    border: 1px solid var(--line);
}

.hub-card {
    display: grid;
    min-height: 430px;
    padding: 42px;
    text-decoration: none;
}

.hub-card--primary {
    background: var(--ink);
    color: #fff;
    border-color: var(--ink);
    gap: 34px;
}

.hub-card-media,
.hub-card-thumb,
.article-card-thumb {
    margin: 0;
    overflow: hidden;
    border: 1px solid rgba(28, 28, 28, 0.1);
    background: #f3f0e8;
}

.hub-card-media {
    border-color: rgba(255, 255, 255, 0.16);
}

.hub-card-media img,
.hub-card-thumb img,
.article-card-thumb img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hub-card-media {
    height: 260px;
}

.hub-card-thumb {
    height: 118px;
    margin-bottom: 22px;
}

.hub-card--sub:nth-child(2) .hub-card-thumb img,
.article-card:nth-child(3) .article-card-thumb img {
    object-position: center top;
}

.hub-card-label,
.article-label {
    display: inline-flex;
    width: fit-content;
    margin: 0 0 18px;
    padding: 4px 12px;
    background: var(--accent-color);
    color: var(--ink);
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.18em;
}

.hub-card-title {
    margin: 0;
    font-size: clamp(25px, 3vw, 40px);
    font-weight: 900;
    line-height: 1.45;
    letter-spacing: 0.06em;
}

.hub-card-desc {
    max-width: 540px;
    margin: 24px 0 0;
    color: rgba(255, 255, 255, 0.72);
    font-size: 14px;
    line-height: 2;
    letter-spacing: 0.04em;
}

.hub-card-meta {
    align-self: end;
    margin: 44px 0 0;
    color: rgba(255, 255, 255, 0.64);
    font-size: 12px;
    letter-spacing: 0.12em;
}

.hub-subgrid {
    display: grid;
    gap: 18px;
}

.hub-card--sub {
    min-height: 0;
    padding: 28px;
}

.hub-card--sub .hub-card-title {
    font-size: 20px;
}

.hub-card--sub .hub-card-desc {
    color: var(--sub-text-color);
    margin-top: 14px;
}

.path-grid,
.theme-grid,
.series-grid,
.latest-grid {
    display: grid;
    gap: 20px;
}

.path-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.theme-grid,
.series-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.latest-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.latest-carousel {
    overflow: hidden;
}

.latest-grid--carousel {
    grid-auto-flow: column;
    grid-auto-columns: calc((100% - 40px) / 3);
    grid-template-columns: none;
    overflow-x: auto;
    overflow-y: hidden;
    padding-bottom: 8px;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.latest-grid--carousel::-webkit-scrollbar {
    display: none;
}

.latest-grid--carousel .article-card {
    scroll-snap-align: start;
}

.contents-heading {
    text-align: center;
    margin-bottom: 48px;
}

.contents-title {
    display: inline-flex;
    align-items: baseline;
    gap: 22px;
    margin: 0;
    color: var(--ink);
    font-size: clamp(28px, 3vw, 38px);
    font-weight: 900;
    line-height: 1.25;
    letter-spacing: 0.06em;
    white-space: nowrap;
}

.contents-title span {
    display: inline-flex;
    align-items: center;
    gap: 20px;
    color: var(--sub-text-color);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.contents-title span::before {
    content: "";
    width: 1px;
    height: 24px;
    background: var(--ink);
}

.contents-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    border-left: 1px solid var(--line);
    border-right: 1px solid var(--line);
}

.contents-card {
    display: grid;
    justify-items: center;
    align-content: start;
    min-height: 0;
    padding: 24px 28px;
    border-right: 1px solid var(--line);
    color: inherit;
    text-align: center;
    text-decoration: none;
}

.contents-card:last-child {
    border-right: 0;
}

.contents-card--soon {
    color: #77746c;
}

.contents-card-photo {
    width: min(168px, 100%);
    aspect-ratio: 1;
    margin: 0 0 18px;
    overflow: hidden;
    border-radius: 50%;
    background: #f3f0e8;
}

.contents-card-photo img {
    display: block;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.contents-card-count {
    margin: 0 0 10px;
    color: var(--muted);
    font-family: Arial, sans-serif;
    font-size: 10px;
    font-weight: 800;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.contents-card-title {
    margin: 0 0 10px;
    color: var(--ink);
    font-size: clamp(18px, 1.55vw, 22px);
    font-weight: 900;
    line-height: 1.4;
    letter-spacing: 0.04em;
    white-space: normal;
}

.contents-card-title::before {
    content: ">";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    margin-right: 8px;
    border: 2px solid var(--ink);
    border-radius: 50%;
    font-family: Arial, sans-serif;
    font-size: 13px;
    line-height: 1;
    transform: translateY(-1px);
}

.contents-card-text {
    margin: 0;
    color: var(--sub-text-color);
    font-size: 13px;
    line-height: 1.75;
    letter-spacing: 0.04em;
}

.path-card,
.series-card,
.article-card {
    padding: 28px;
    text-decoration: none;
}

.article-card-thumb {
    height: 156px;
    margin: -28px -28px 24px;
    border-width: 0 0 1px;
}

.path-card-title,
.series-card-title,
.article-card-title {
    margin: 0;
    color: var(--ink);
    font-weight: 900;
    line-height: 1.55;
    letter-spacing: 0.06em;
}

.path-card-title {
    font-size: 18px;
}

.series-card-title,
.article-card-title {
    font-size: 19px;
}

.path-card-text,
.series-card-text,
.article-card-excerpt {
    margin: 14px 0 0;
    color: var(--sub-text-color);
    font-size: 13px;
    line-height: 1.95;
    letter-spacing: 0.04em;
}

.theme-list {
    display: grid;
    gap: 0;
    border-top: 1px solid var(--line);
}

.theme-row {
    display: grid;
    grid-template-columns: 220px minmax(0, 1fr) auto;
    gap: 32px;
    align-items: center;
    padding: 30px 0;
    border-bottom: 1px solid var(--line);
    text-decoration: none;
}

.theme-row-title {
    margin: 0;
    color: var(--ink);
    font-size: 20px;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.theme-row-text {
    margin: 0;
    color: var(--sub-text-color);
    font-size: 14px;
    line-height: 1.9;
    letter-spacing: 0.04em;
}

.theme-row-arrow {
    width: 34px;
    height: 34px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 999px;
    background: var(--accent-color);
}

.article-card-meta,
.series-card-meta,
.article-meta {
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.16em;
}

.note-strip {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 36px 40px;
    background: var(--ink);
    color: #fff;
}

.note-strip-title {
    margin: 0 0 8px;
    font-size: 22px;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.note-strip-text {
    margin: 0;
    color: rgba(255, 255, 255, 0.7);
    font-size: 13px;
    line-height: 1.9;
    letter-spacing: 0.04em;
}

.note-strip .column-arrow-link {
    color: #fff;
    flex-shrink: 0;
}

.article-hero {
    padding: 92px 0 76px;
    background: var(--warm-paper);
}

.article-hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 0.64fr) minmax(320px, 0.36fr);
    gap: 56px;
    align-items: start;
    margin-top: 44px;
}

.article-hero-title-block {
    max-width: 1040px;
}

.article-title {
    margin: 0;
    color: var(--ink);
    font-size: clamp(30px, 3.6vw, 48px);
    font-weight: 900;
    line-height: 1.45;
    letter-spacing: 0.06em;
}

.article-lead {
    margin: 28px 0 0;
    color: #4f4f4f;
    font-size: 16px;
    line-height: 2.05;
    letter-spacing: 0.04em;
}

.article-lead--side {
    margin: 0 0 24px;
    color: #333;
}

.article-hero-side {
    padding: 4px 0 0 32px;
    border-left: 1px solid var(--line);
}

.article-side-label {
    margin: 0 0 10px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.2em;
}

.article-side-text {
    margin: 0 0 24px;
    color: var(--sub-text-color);
    font-size: 13px;
    line-height: 1.9;
    letter-spacing: 0.04em;
}

.article-cover {
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--line);
    background: #fff;
}

.article-cover--inline {
    max-width: none;
}

.article-cover img {
    display: block;
    width: 100%;
    height: min(420px, 38vw);
    min-height: 280px;
    object-fit: cover;
    object-position: center;
}

.article-visual {
    position: relative;
    min-height: 280px;
    margin: 44px 0 52px;
    overflow: hidden;
    border: 1px solid var(--line);
    background:
        linear-gradient(90deg, rgba(28, 28, 28, 0.045) 1px, transparent 1px),
        linear-gradient(0deg, rgba(28, 28, 28, 0.045) 1px, transparent 1px),
        #fff;
    background-size: 42px 42px;
}

.article-visual::before {
    content: "";
    position: absolute;
    inset: 36px;
    border: 1px solid rgba(28, 28, 28, 0.1);
}

.article-visual-node {
    position: absolute;
    z-index: 1;
    display: grid;
    place-items: center;
    width: 116px;
    height: 116px;
    border: 1px solid var(--ink);
    border-radius: 50%;
    background: #fff;
    color: var(--ink);
    font-size: 13px;
    font-weight: 900;
    letter-spacing: 0.18em;
}

.article-visual-node--child {
    left: 16%;
    top: 82px;
}

.article-visual-node--ai {
    right: 16%;
    top: 82px;
    background: var(--ink);
    color: #fff;
}

.article-visual-line {
    position: absolute;
    left: calc(16% + 116px);
    right: calc(16% + 116px);
    top: 140px;
    height: 1px;
    background: var(--ink);
}

.article-visual-question {
    position: absolute;
    z-index: 2;
    padding: 7px 12px;
    background: var(--accent-color);
    color: var(--ink);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: 0.08em;
}

.article-visual-question--one {
    left: 40%;
    top: 52px;
}

.article-visual-question--two {
    left: 48%;
    top: 132px;
}

.article-visual-question--three {
    left: 34%;
    bottom: 48px;
}

.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 760px) 260px;
    gap: 76px;
    align-items: start;
}

.article-layout > * {
    min-width: 0;
}

.article-body {
    min-width: 0;
    color: #333;
    font-size: 16px;
    line-height: 2.05;
    letter-spacing: 0.04em;
}

.article-body h2 {
    margin: 76px 0 22px;
    color: var(--ink);
    font-size: 28px;
    line-height: 1.45;
    letter-spacing: 0.07em;
}

.article-body h3 {
    margin: 46px 0 16px;
    color: var(--ink);
    font-size: 20px;
    line-height: 1.5;
    letter-spacing: 0.06em;
}

.article-body p {
    margin: 0 0 24px;
}

.article-body ul {
    margin: 0 0 28px;
    padding-left: 1.3em;
}

.article-body li {
    margin-bottom: 10px;
}

.article-body p,
.article-body li,
.article-body h2,
.article-body h3,
.article-body a,
.article-body summary,
.article-author p,
.article-cta p {
    overflow-wrap: anywhere;
}

.article-body > * {
    max-width: 100%;
}

.article-body img,
.article-body video,
.article-body iframe,
.article-body canvas,
.article-body svg,
.article-body .wp-block-image img,
.article-body .wp-block-cover,
.article-body .wp-block-embed iframe {
    max-width: 100%;
    height: auto;
}

.article-body pre,
.article-body code {
    max-width: 100%;
    overflow-x: auto;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.article-body code {
    display: inline-block;
    padding: 0.16em 0.5em;
    background: var(--code-paper);
    color: var(--code-ink);
}

.article-body pre {
    padding: 22px 24px;
    background: var(--code-paper);
    color: var(--code-ink);
}

.article-body pre code {
    display: block;
    padding: 0;
}

.article-body table {
    display: block;
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    border-collapse: collapse;
}

.article-body blockquote,
.article-body .wp-block-quote,
.article-body .wp-block-pullquote,
.article-body .wp-block-pullquote blockquote {
    margin: 36px 0;
    padding: 28px 30px;
    background: var(--quote-paper);
    border: 1px solid var(--quote-line);
}

.article-body blockquote,
.article-body .wp-block-quote {
    border-left: 4px solid var(--accent-color);
}

.article-body .wp-block-pullquote {
    text-align: left;
}

.article-body .wp-block-pullquote blockquote {
    margin: 0;
    padding: 0;
    border: 0;
    background: transparent;
}

.article-body blockquote p:last-child,
.article-body .wp-block-quote p:last-child,
.article-body .wp-block-pullquote p:last-child {
    margin-bottom: 0;
}

.article-body details {
    margin: 32px 0;
    padding: 20px 22px;
    background: #faf8f2;
    border: 1px solid var(--line);
}

.article-body summary {
    cursor: pointer;
    font-weight: 800;
    color: var(--ink);
}

.article-body summary + * {
    margin-top: 16px;
}

.faq-section {
    margin: 40px 0;
}

.faq-section h2 {
    margin-top: 0;
}

.faq-item {
    margin: 0 0 8px;
    padding: 0;
    border-radius: 4px;
}

.faq-item[open] {
    border-color: var(--accent-color);
}

.faq-question {
    padding: 18px 22px;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    flex-shrink: 0;
    font-size: 22px;
    font-weight: 400;
    color: var(--muted);
    line-height: 1;
}

.faq-item[open] .faq-question::after {
    content: '−';
}

.faq-answer {
    padding: 0 22px 18px;
    color: var(--sub-text-color);
}

.faq-answer p:last-child {
    margin-bottom: 0;
}

/* --- Article summary box --- */
.article-summary {
    margin: 0 0 52px;
    padding: 28px 32px;
    border: 1px solid var(--line);
}

.article-summary-title {
    margin: 0 0 18px;
    font-size: 14px;
    font-weight: 800;
    letter-spacing: 0.06em;
    color: var(--ink);
}

.article-summary ul {
    margin: 0;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.article-summary li {
    margin: 0;
    padding-left: 1.2em;
    position: relative;
    font-size: 15px;
    line-height: 1.75;
}

.article-summary li::before {
    content: '•';
    position: absolute;
    left: 0;
}

/* --- Inline highlight (bottom-third underline style) --- */
mark,
.highlight {
    background: linear-gradient(transparent 67%, var(--accent-color) 67%);
    padding: 0 0.1em;
    color: inherit;
    font-weight: 700;
}

/* --- In-article diagram (figure) --- */
.article-body .article-diagram {
    margin: 38px 0;
}

.article-body .article-diagram img {
    display: block;
    width: 100%;
    height: auto;
    border: 1px solid var(--line);
    border-radius: 8px;
}

/* --- Feature list (yellow dot, boxed) --- */
.article-body .feature-list {
    padding: 24px 28px;
    padding-left: 28px;
    list-style: none;
    background: var(--warm-paper);
    border: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.article-body .feature-list li {
    margin: 0;
    padding-left: 1.5em;
    position: relative;
    line-height: 1.75;
}

.article-body .feature-list li::before {
    content: '●';
    position: absolute;
    left: 0;
    color: var(--accent-color);
    font-size: 11px;
    top: 0.32em;
}

/* --- Callout box (left accent border) --- */
.callout {
    margin: 36px 0;
    padding: 24px 28px;
    background: var(--warm-paper);
    border-left: 3px solid var(--accent-color);
}

.callout-label {
    display: block;
    margin: 0 0 12px;
    font-size: 13px;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--ink);
}

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

/* --- TOC nav (heading list) --- */
.toc-nav-list {
    margin: 0 0 24px;
    padding: 0;
    list-style: none;
    display: flex;
    flex-direction: column;
}

.toc-nav-link {
    display: block;
    padding: 6px 0;
    font-size: 13px;
    color: var(--sub-text-color);
    text-decoration: none;
    line-height: 1.5;
    transition: color 0.15s;
}

.toc-nav-link:hover {
    color: var(--ink);
}

.toc-nav-link.is-active {
    color: var(--ink);
    font-weight: 700;
}

.marker {
    background: linear-gradient(transparent 58%, rgba(247, 224, 49, 0.72) 58%);
    font-weight: 700;
}

.article-bullet-list {
    padding: 24px 28px 22px;
    border: 1px solid var(--line);
    background: #fff;
    list-style: none;
}

.article-bullet-list li {
    position: relative;
    padding-left: 24px;
}

.article-bullet-list li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 0.82em;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--accent-color);
}

.article-insight {
    margin: 36px 0;
    padding: 24px 28px;
    border-left: 3px solid var(--accent-color);
    background: #faf8f2;
}

.article-insight-label {
    margin: 0 0 8px;
    color: var(--ink);
    font-size: 12px;
    font-weight: 900;
    letter-spacing: 0.16em;
}

.article-insight-text {
    margin: 0;
    color: #444;
    font-size: 15px;
    line-height: 1.95;
}

.article-summary {
    padding: 28px 30px;
    margin: 0 0 52px;
    background: #fff;
    border: 1px solid var(--line);
}

.article-summary-title {
    margin: 0 0 14px;
    color: var(--ink);
    font-size: 16px;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.article-summary ul {
    margin: 0;
}

.article-note-box,
.article-author,
.article-next-box,
.article-cta {
    padding: 28px 30px;
    margin-top: 52px;
    min-width: 0;
    overflow: hidden;
}

.article-note-box-title,
.article-author-title,
.article-next-title,
.article-cta-title {
    margin: 0 0 12px;
    color: var(--ink);
    font-size: 17px;
    font-weight: 900;
    letter-spacing: 0.08em;
}

.article-note-box p,
.article-author p,
.article-next-box p,
.article-cta p {
    margin: 0 0 18px;
    color: var(--sub-text-color);
    font-size: 14px;
    line-height: 1.95;
}

.article-author-top {
    display: grid;
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    min-height: 96px;
}

.article-author-media {
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    flex: 0 0 96px;
}

.article-author-photo {
    position: relative;
    display: block;
    margin: 0;
    width: 96px;
    max-width: 96px;
    min-width: 96px;
    height: 96px;
    max-height: 96px;
    overflow: hidden;
    border-radius: 999px;
    background: #f3f0e8;
    flex: 0 0 96px;
}

.article-author-photo img {
    position: absolute;
    inset: 0;
    display: block;
    width: 100% !important;
    height: 100% !important;
    max-width: none;
    object-fit: cover;
    object-position: center;
}

.article-author-meta {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 8px;
    min-width: 0;
    padding-top: 8px;
}

.article-author .article-author-title {
    margin: 0;
    color: var(--ink);
    font-size: 28px;
    font-weight: 900;
    line-height: 1;
    letter-spacing: 0.04em;
}

.article-author-body {
    display: block;
}

.article-author .article-author-name,
.article-author .article-author-role {
    margin: 0;
    color: var(--sub-text-color);
}

.article-author .article-author-name {
    font-size: 16px;
    line-height: 1.45;
    overflow-wrap: anywhere;
    margin-top: 6px;
}

.article-author .article-author-role {
    font-size: 16px;
    line-height: 1.45;
}

.article-author .article-author-body p {
    margin: 0;
    color: var(--sub-text-color);
    font-size: 14px;
    line-height: 1.95;
}

.article-author-footer {
    display: flex;
    justify-content: flex-end;
}

.article-author-footer .column-text-link {
    display: flex;
    width: fit-content;
    justify-content: flex-end;
    text-align: right;
}

.article-author {
    display: grid;
    row-gap: 24px;
}

.article-cta {
    margin-top: 24px;
    padding-top: 22px;
    padding-bottom: 20px;
}

.article-cta .article-cta-title {
    margin: 0 0 14px;
}

.article-cta .column-arrow-link {
    display: flex;
    width: fit-content;
    margin-left: auto;
    justify-content: flex-end;
    text-align: right;
}

.article-sidebar {
    position: sticky;
    top: 92px;
}

.toc {
    padding: 24px 0;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
}

.toc-title {
    margin: 0 0 16px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.2em;
}

.toc-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
}

.toc-share {
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--line);
}

.toc-share-title {
    margin: 0 0 14px;
    color: var(--muted);
    font-size: 11px;
    font-weight: 800;
    letter-spacing: 0.2em;
}

.toc-share-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.toc-share-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 24px;
    width: 24px;
    min-width: 24px;
    max-width: 24px;
    height: 24px;
    min-height: 24px;
    max-height: 24px;
    overflow: hidden;
    color: var(--ink);
    text-decoration: none;
    line-height: 0;
}

.toc-share-link svg {
    display: block;
    flex: 0 0 24px;
    width: 24px;
    min-width: 24px;
    max-width: 24px;
    height: 24px;
    min-height: 24px;
    max-height: 24px;
    fill: currentColor;
}

.toc-share-link:hover,
.toc-share-link:focus-visible {
    color: #4a4a4a;
}

.toc-list a {
    color: #555;
    text-decoration: none;
    font-size: 13px;
    line-height: 1.65;
}

.article-footer-nav {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    margin-top: 72px;
}

.column-footer {
    position: relative;
    overflow: hidden;
    background: var(--ink);
    color: #fff;
}

.column-footer-inner {
    width: min(1120px, calc(100% - 48px));
    margin: 0 auto;
    padding: 48px 0 28px;
}

.column-footer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding-bottom: 28px;
    margin-bottom: 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.column-footer-logo-img {
    height: 24px;
    width: auto;
    filter: invert(1);
}

.column-footer-nav ul {
    display: flex;
    gap: 28px;
    flex-wrap: wrap;
    justify-content: flex-end;
    list-style: none;
    margin: 0;
    padding: 0;
}

.column-footer-nav a {
    color: rgba(255, 255, 255, 0.62);
    text-decoration: none;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.18em;
}

.column-copyright {
    margin: 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.35);
    font-size: 10px;
    letter-spacing: 0.14em;
}

@media (max-width: 920px) {
    .column-main {
        padding-top: calc(var(--header-height) - 8px);
    }

    .column-hero {
        padding: 28px 0 56px;
    }

    .column-nav {
        display: none;
    }

    .column-menu-button {
        display: block;
    }

    .column-section-heading,
    .hub-grid,
    .article-hero-inner,
    .article-layout {
        grid-template-columns: 1fr;
    }

    .column-note-panel,
    .article-hero-side {
        padding-left: 0;
        border-left: 0;
        border-top: 1px solid var(--line);
        padding-top: 28px;
    }

    .column-hero-head {
        margin-bottom: 34px;
    }

    .column-hero-title-row,
    .hero-magazine-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .column-title {
        font-size: clamp(44px, 7.6vw, 62px);
        white-space: normal;
    }

    .column-lead {
        max-width: none;
        font-size: 17px;
        line-height: 1.95;
    }

    .hero-main-story {
        min-height: 0;
        grid-template-columns: 1fr;
        grid-template-rows: minmax(280px, 42vw) auto;
    }

    .hero-main-media {
        min-height: 280px;
    }

    .hero-main-body {
        padding: 28px 24px 30px;
    }

    .hero-story-meta,
    .hero-author-line {
        font-size: 13px;
    }

    .hero-main-title {
        font-size: 40px;
        line-height: 1.32;
    }

    .hero-main-text {
        font-size: 18px;
        line-height: 1.85;
    }

    .hero-story-title {
        font-size: 21px;
        line-height: 1.58;
    }

    .path-grid,
    .article-footer-nav {
        grid-template-columns: 1fr 1fr;
    }

    .latest-grid--carousel {
        grid-auto-columns: calc((100% - 20px) / 2);
    }

    .contents-grid {
        grid-template-columns: 1fr;
        border-top: 1px solid var(--line);
        border-right: 0;
    }

    .contents-heading {
        margin-bottom: 36px;
    }

    .contents-title {
        gap: 14px;
        font-size: 40px;
        line-height: 1.3;
        white-space: normal;
    }

    .contents-title span {
        font-size: 16px;
    }

    .contents-card {
        grid-template-columns: 128px minmax(0, 1fr);
        justify-items: start;
        align-items: center;
        min-height: 0;
        padding: 20px 0;
        border-bottom: 1px solid var(--line);
        border-right: 0;
        text-align: left;
        column-gap: 24px;
    }

    .contents-card-photo {
        width: 128px;
        margin: 0;
    }

    .contents-card-body {
        display: grid;
        gap: 6px;
    }

    .contents-card-count {
        margin-bottom: 0;
        font-size: 12px;
    }

    .contents-card-title {
        margin: 0;
        font-size: 30px;
    }

    .contents-card-text {
        margin: 0;
        font-size: 17px;
        line-height: 1.8;
    }

    .article-sidebar {
        position: static;
        order: -1;
    }

}

@media (max-width: 640px) {
    .column-header-inner,
    .column-container,
    .column-container--narrow,
    .column-footer-inner {
        width: calc(100% - 32px);
    }

    .column-main {
        padding-top: calc(var(--header-height) - 10px);
    }

    .column-section {
        padding: 76px 0;
    }

    .column-hero {
        padding: 22px 0 52px;
    }

    .column-title {
        font-size: 42px;
        white-space: normal;
    }

    .column-hero-title-row,
    .hero-magazine-grid {
        grid-template-columns: 1fr;
    }

    .column-hero-head {
        margin-bottom: 36px;
    }

    .hero-main-story {
        min-height: 0;
        grid-template-rows: 260px auto;
        grid-template-columns: 1fr;
    }

    .hero-main-media {
        height: 100%;
    }

    .hero-main-body {
        padding: 28px 22px;
    }

    .hero-story-card {
        grid-template-columns: 96px minmax(0, 1fr);
    }

    .hero-story-thumb {
        height: 92px;
    }

    .column-lead,
    .article-lead {
        font-size: 15px;
    }

    .column-lead {
        max-width: none;
        margin-top: 18px;
        font-size: 13px;
    }

    .hub-card,
    .path-card,
    .series-card,
    .article-card,
    .article-note-box,
    .article-author,
    .article-next-box,
    .article-cta {
        padding: 24px 20px;
    }

    .path-grid,
    .theme-grid,
    .series-grid,
    .article-footer-nav {
        grid-template-columns: 1fr;
    }

    .latest-grid--carousel {
        grid-auto-columns: 86%;
    }

    .contents-grid {
        grid-template-columns: 1fr;
        border-right: 0;
    }

    .contents-card {
        grid-template-columns: 96px minmax(0, 1fr);
        align-items: center;
        min-height: 0;
        padding: 18px 0;
        border-right: 0;
        column-gap: 16px;
    }

    .contents-card-photo {
        width: 96px;
        margin: 0;
    }

    .contents-title {
        display: grid;
        gap: 10px;
        white-space: normal;
    }

    .contents-title span {
        justify-content: center;
        font-size: 12px;
    }

    .contents-title span::before {
        display: none;
    }

    .contents-card-title {
        white-space: normal;
        font-size: 18px;
    }

    .contents-card-text {
        font-size: 12px;
        line-height: 1.65;
    }

    .theme-row {
        grid-template-columns: 1fr auto;
        gap: 16px;
    }

    .theme-row-text {
        grid-column: 1 / -1;
    }

    .note-strip {
        display: grid;
        padding: 28px 22px;
    }

    .article-title {
        font-size: 32px;
    }

    .article-body {
        font-size: 15px;
    }

    .article-body h2 {
        font-size: 24px;
    }

    .article-visual {
        min-height: 300px;
        margin: 34px 0 44px;
    }

    .article-visual-node {
        width: 88px;
        height: 88px;
        font-size: 11px;
    }

    .article-visual-node--child {
        left: 9%;
        top: 78px;
    }

    .article-visual-node--ai {
        right: 9%;
        top: 78px;
    }

    .article-visual-line {
        left: calc(9% + 88px);
        right: calc(9% + 88px);
        top: 122px;
    }

    .article-visual-question {
        font-size: 11px;
    }

    .article-visual-question--one {
        left: 34%;
        top: 38px;
    }

    .article-visual-question--two {
        left: 43%;
        top: 148px;
    }

    .article-visual-question--three {
        left: 16%;
        bottom: 42px;
    }

    .column-footer-top {
        align-items: flex-start;
        flex-direction: column;
    }

    .column-footer-nav ul {
        justify-content: flex-start;
    }

    .article-cta .column-arrow-link {
        width: 100%;
        justify-content: space-between;
    }

    .article-author-top {
        grid-template-columns: 1fr;
        gap: 16px;
        min-height: 0;
    }

    .article-author-photo {
        width: 88px;
        max-width: 88px;
        min-width: 88px;
        height: 88px;
        max-height: 88px;
    }

    .article-author .article-author-title {
        font-size: 24px;
    }

    .article-author-name {
        font-size: 17px;
    }

    .article-author-role {
        font-size: 15px;
    }
}