:root {
      --ink: #06131f;
      --ink-rgb: 6, 19, 31;
      --paper: #ffffff;
      --page: #f8f7f2;
      --surface: #ffffff;
      --surface-rgb: 255, 255, 255;
      --line: #dbe3ea;
      --muted: #4b5563;
      --signal: #0b63ce;
      --card-gradient:
        radial-gradient(ellipse at 8% 0%, rgba(6, 19, 31, 0.052) 0%, rgba(6, 19, 31, 0.016) 34%, rgba(6, 19, 31, 0) 62%),
        linear-gradient(145deg, #ffffff 0%, #f8f7f2 58%, #e7edf2 100%);
      --card-hover-gradient: linear-gradient(145deg, #f8fbff 0%, #ffffff 58%, #eaf2fb 100%);
      --footer-gradient: linear-gradient(180deg, #eef2f5 0%, #f8f7f2 62%);
      --reveal-ease: cubic-bezier(0.2, 0.84, 0.2, 1);
      --reveal-duration: 0.72s;
      --font-sans: HelveticaNeue, "Helvetica Neue", Helvetica, Arial,
        "游ゴシック体", YuGothic, "游ゴシック Medium", "Yu Gothic Medium",
        "游ゴシック", "Yu Gothic", "ヒラギノ角ゴ ProN W3", "Hiragino Kaku Gothic ProN",
        "ヒラギノ角ゴ Pro W3", "Hiragino Kaku Gothic Pro", "MS ゴシック", "MS Gothic",
        sans-serif;
      --font-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
      font-family: var(--font-sans);
      color: var(--ink);
      background: var(--paper);
    }

    html[data-color-mode="light"] { color-scheme: light; }

    html[data-color-mode="dark"] {
      color-scheme: dark;
      --ink: #edf4fa;
      --ink-rgb: 237, 244, 250;
      --page: #07121c;
      --surface: #0d1b28;
      --surface-rgb: 13, 27, 40;
      --line: #2b4154;
      --muted: #afbdc9;
      --signal: #7cbcff;
      --card-gradient:
        radial-gradient(ellipse at 8% 0%, rgba(124, 188, 255, 0.11) 0%, rgba(124, 188, 255, 0.03) 34%, rgba(7, 18, 28, 0) 62%),
        linear-gradient(145deg, #13283a 0%, #0d1b28 58%, #091722 100%);
      --card-hover-gradient: linear-gradient(145deg, #17334a 0%, #102538 58%, #0b1c2a 100%);
      --footer-gradient: linear-gradient(180deg, #0d1b28 0%, #07121c 62%);
      background: var(--page);
    }

    * { box-sizing: border-box; }

    html {
      overflow-x: hidden;
    }

    body {
      margin: 0;
      font-size: 16px;
      line-height: 1.8;
      font-feature-settings: "palt";
      -webkit-font-smoothing: antialiased;
      word-wrap: break-word;
      background: var(--page);
      overflow-x: hidden;
    }

    a { color: inherit; text-decoration: none; }
    img { display: block; max-width: 100%; height: auto; }

    .site-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 18px;
      min-height: 62px;
      padding: 14px clamp(20px, 4vw, 58px) 10px;
      background: var(--page);
      box-shadow: inset 0 -1px 0 rgba(var(--ink-rgb), 0.08);
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 7px;
    }

    .brand-symbol { width: 40px; }
    .brand-wordmark { width: 96px; }

    .back-link {
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 780;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .back-link:hover,
    .back-link:focus-visible {
      color: var(--signal);
      outline: none;
    }

    main {
      width: min(100%, 1160px);
      max-width: 1160px;
      margin: 0 auto;
      padding: clamp(40px, 7vw, 88px) clamp(20px, 4vw, 40px) clamp(60px, 9vw, 120px);
    }

    .breadcrumb {
      margin: 0;
      color: var(--muted);
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 780;
      letter-spacing: 0.06em;
    }

    .breadcrumb a {
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .breadcrumb a:hover,
    .breadcrumb a:focus-visible {
      color: var(--signal);
      outline: none;
    }

    .research-toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 18px;
    }

    .color-mode-toggle {
      display: inline-flex;
      flex: 0 0 auto;
      align-items: center;
      gap: 8px;
      min-height: 36px;
      padding: 7px 11px;
      border: 1px solid rgba(var(--ink-rgb), 0.4);
      background: var(--surface);
      color: var(--ink);
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 820;
      letter-spacing: 0.06em;
      text-transform: uppercase;
      cursor: pointer;
    }

    .color-mode-toggle:hover,
    .color-mode-toggle:focus-visible {
      border-color: var(--signal);
      color: var(--signal);
      outline: 2px solid var(--signal);
      outline-offset: 2px;
    }

    .color-mode-toggle-icon {
      position: relative;
      width: 12px;
      height: 12px;
      border: 1px solid currentColor;
      border-radius: 50%;
    }

    .color-mode-toggle-icon::after {
      position: absolute;
      inset: 2px 2px 2px 5px;
      border-radius: 0 999px 999px 0;
      background: currentColor;
      content: "";
    }

    .section-label {
      color: var(--signal);
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 780;
      letter-spacing: 0.1em;
      text-transform: uppercase;
    }

    h1 {
      margin: 14px 0 10px;
      font-size: clamp(28px, 4vw, 40px);
      font-weight: 820;
      line-height: 1.2;
      letter-spacing: 0.02em;
    }

    .research-lead {
      max-width: 760px;
      margin: 0 0 44px;
      color: var(--ink);
    }

    .research-lead a {
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .research-lead a:hover,
    .research-lead a:focus-visible {
      color: var(--signal);
      outline: none;
    }

    .ai2040-project {
      position: relative;
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: end;
      margin: 0 0 44px;
      padding: clamp(22px, 4vw, 42px);
      overflow: hidden;
      border: 1px solid var(--ink);
      background:
        radial-gradient(circle at 88% 34%, rgba(11, 99, 206, 0.72), transparent 31%),
        linear-gradient(135deg, #02080d 0%, #071928 72%, #0b63ce 170%);
      color: #f8f7f2;
      text-decoration: none;
    }

    .ai2040-project::after {
      content: "2040";
      position: absolute;
      right: clamp(18px, 4vw, 48px);
      top: 50%;
      color: rgba(248, 247, 242, 0.08);
      font-family: var(--font-mono);
      font-size: clamp(96px, 18vw, 220px);
      font-weight: 850;
      letter-spacing: -0.12em;
      line-height: 0.8;
      transform: translateY(-50%);
      pointer-events: none;
    }

    .ai2040-project-copy {
      position: relative;
      z-index: 1;
      display: grid;
      gap: 12px;
      max-width: 720px;
    }

    .ai2040-project-kicker {
      margin: 0;
      color: #7cbcff;
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 820;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .ai2040-project h2 {
      margin: 0;
      color: #f8f7f2;
      font-size: clamp(28px, 4vw, 50px);
      line-height: 1.05;
    }

    .ai2040-project p:last-child {
      max-width: 620px;
      margin: 0;
      color: rgba(248, 247, 242, 0.76);
      font-size: 14px;
      line-height: 1.7;
    }

    .ai2040-project-cta {
      position: relative;
      z-index: 1;
      white-space: nowrap;
      color: #f8f7f2;
      font-size: 13px;
      font-weight: 820;
      letter-spacing: 0.04em;
    }

    .ai2040-project:hover,
    .ai2040-project:focus-visible {
      border-color: #7cbcff;
      outline: none;
    }

    .ai2040-project:hover .ai2040-project-cta,
    .ai2040-project:focus-visible .ai2040-project-cta {
      color: #7cbcff;
    }

    @media (max-width: 700px) {
      .ai2040-project {
        grid-template-columns: 1fr;
        align-items: start;
      }
    }

    .translation-archive {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      gap: 24px;
      align-items: center;
      margin: -20px 0 44px;
      padding: clamp(20px, 3vw, 30px);
      border: 1px solid rgba(var(--ink-rgb), 0.42);
      border-left: 5px solid var(--signal);
      background: var(--surface);
    }

    .translation-archive-copy {
      display: grid;
      gap: 8px;
      max-width: 760px;
    }

    .translation-archive-kicker {
      margin: 0;
      color: var(--signal);
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 820;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .translation-archive h2 {
      margin: 0;
      font-size: clamp(21px, 3vw, 29px);
      line-height: 1.3;
    }

    .translation-archive-copy > p:last-child {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .translation-archive-link {
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      padding: 9px 14px;
      border: 1px solid var(--ink);
      background: var(--ink);
      color: var(--paper);
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 820;
      letter-spacing: 0.03em;
      white-space: nowrap;
    }

    .translation-archive-link:hover,
    .translation-archive-link:focus-visible {
      border-color: var(--signal);
      background: var(--signal);
      color: var(--paper);
      outline: none;
    }

    @media (max-width: 700px) {
      .translation-archive {
        grid-template-columns: 1fr;
        align-items: start;
        margin-top: -18px;
      }

      .translation-archive-link {
        justify-content: space-between;
        width: 100%;
        white-space: normal;
      }
    }

    .explore-panel {
      display: grid;
      grid-template-columns: minmax(0, 0.92fr) minmax(280px, 0.58fr);
      gap: clamp(18px, 4vw, 40px);
      align-items: start;
      margin: 0 0 44px;
      padding: clamp(18px, 3vw, 28px) 0;
      border-top: 1px solid rgba(var(--ink-rgb), 0.24);
      border-bottom: 1px solid rgba(var(--ink-rgb), 0.24);
    }

    .explore-search {
      display: grid;
      gap: 14px;
      min-width: 0;
    }

    .explore-search label {
      color: var(--signal);
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 820;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .explore-input-wrap {
      display: grid;
      grid-template-columns: minmax(0, 1fr) auto;
      min-height: 54px;
      border: 1px solid var(--ink);
      background: var(--surface);
    }

    .explore-input-wrap input {
      width: 100%;
      min-width: 0;
      border: 0;
      padding: 13px 16px;
      background: transparent;
      color: var(--ink);
      font: inherit;
      font-size: 17px;
      line-height: 1.3;
      outline: none;
    }

    .explore-input-wrap button {
      min-width: 52px;
      border: 0;
      border-left: 1px solid var(--ink);
      background: #06131f;
      color: var(--paper);
      font-family: var(--font-mono);
      font-size: 18px;
      font-weight: 820;
      cursor: pointer;
    }

    .explore-input-wrap:focus-within {
      box-shadow: 0 0 0 3px rgba(11, 99, 206, 0.16);
      border-color: var(--signal);
    }

    .explore-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .explore-chip {
      min-height: 34px;
      padding: 7px 11px;
      border: 1px solid rgba(var(--ink-rgb), 0.4);
      background: rgba(var(--surface-rgb), 0.72);
      color: var(--ink);
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 820;
      letter-spacing: 0.04em;
      text-transform: uppercase;
      cursor: pointer;
    }

    .explore-chip:hover,
    .explore-chip:focus-visible,
    .explore-chip.is-active {
      border-color: var(--signal);
      background: var(--signal);
      color: var(--paper);
      outline: none;
    }

    .explore-summary {
      display: grid;
      gap: 12px;
      min-width: 0;
      padding-top: 4px;
    }

    .explore-summary p {
      margin: 0;
      color: var(--muted);
      font-size: 14px;
      line-height: 1.65;
    }

    .explore-count {
      color: var(--ink);
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 820;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .explore-empty {
      display: none;
      margin: 20px 0 0;
      padding: 18px;
      border: 1px solid var(--ink);
      background: var(--surface);
      color: var(--muted);
      font-size: 14px;
    }

    .explore-empty.is-visible {
      display: block;
    }

    .reading-guide {
      display: grid;
      grid-template-columns: minmax(180px, 220px) minmax(0, 1fr);
      gap: 18px;
      align-items: stretch;
      margin: 0 0 28px;
      padding: 16px 0;
      border-top: 1px solid rgba(var(--ink-rgb), 0.22);
      border-bottom: 1px solid rgba(var(--ink-rgb), 0.22);
    }

    .reading-guide h2 {
      margin: 0;
      font-size: clamp(20px, 2vw, 26px);
      font-weight: 820;
      line-height: 1.08;
      letter-spacing: 0.01em;
      display: flex;
      align-items: center;
    }

    .reading-guide-list {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      border-top: 1px solid var(--ink);
      border-left: 1px solid var(--ink);
    }

    .reading-guide-list a {
      display: grid;
      gap: 6px;
      min-height: 88px;
      padding: 12px 14px;
      border-right: 1px solid var(--ink);
      border-bottom: 1px solid var(--ink);
      background: var(--surface);
      text-decoration: none;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .reading-guide-list a:hover,
    .reading-guide-list a:focus-visible {
      background: #06131f;
      color: var(--signal);
      outline: none;
    }

    .reading-guide-list a:hover span,
    .reading-guide-list a:focus-visible span {
      color: var(--paper);
    }

    .reading-guide-list b {
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 780;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .reading-guide-list span {
      color: var(--ink);
      font-size: 15px;
      font-weight: 760;
      line-height: 1.45;
    }

    .theme-guide {
      margin: 0 0 28px;
      border-top: 1px solid rgba(var(--ink-rgb), 0.22);
      border-bottom: 1px solid rgba(var(--ink-rgb), 0.22);
    }

    .theme-guide-summary {
      display: grid;
      grid-template-columns: auto minmax(0, 1fr) auto;
      gap: 14px 20px;
      align-items: center;
      min-height: 78px;
      padding: 14px 0;
      color: var(--ink);
      cursor: pointer;
      list-style: none;
    }

    .theme-guide-summary::-webkit-details-marker { display: none; }

    .theme-guide-summary:focus-visible {
      outline: 2px solid var(--signal);
      outline-offset: 4px;
    }

    .theme-guide-heading {
      display: grid;
      gap: 3px;
    }

    .theme-guide-title {
      font-size: clamp(20px, 2vw, 26px);
      font-weight: 820;
      line-height: 1.15;
      letter-spacing: 0.01em;
    }

    .theme-guide-summary-note {
      color: var(--muted);
      font-size: 13px;
      line-height: 1.45;
    }

    .theme-guide-summary-action {
      display: inline-flex;
      align-items: center;
      justify-content: flex-end;
      gap: 10px;
      min-height: 44px;
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 820;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .theme-guide-summary-action::before { content: "7テーマを見る"; }
    .theme-guide[open] .theme-guide-summary-action::before { content: "閉じる"; }

    .theme-guide-summary-arrow {
      display: grid;
      place-items: center;
      width: 34px;
      height: 34px;
      border: 1px solid currentColor;
      transition: transform 0.2s ease;
    }

    .theme-guide[open] .theme-guide-summary-arrow { transform: rotate(180deg); }

    .theme-guide-content {
      padding: 0 0 18px;
    }

    .theme-index {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(min(280px, 100%), 1fr));
      gap: 0;
      margin: 0;
      padding: 0;
      list-style: none;
      border-top: 1px solid var(--ink);
      border-left: 1px solid var(--ink);
    }

    .theme-card {
      display: grid;
      gap: 10px;
      padding: 16px;
      border-right: 1px solid var(--ink);
      border-bottom: 1px solid var(--ink);
      background: var(--surface);
    }

    .theme-card-head {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 12px;
      text-decoration: none;
      color: var(--ink);
    }

    .theme-card-head:hover .theme-card-title,
    .theme-card-head:focus-visible .theme-card-title {
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .theme-card-title {
      font-size: 17px;
      font-weight: 800;
      line-height: 1.35;
    }

    .theme-card-count {
      flex: none;
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 780;
      letter-spacing: 0.06em;
      color: rgba(var(--ink-rgb), 0.7);
    }

    .theme-card-desc {
      margin: 0;
      font-size: 13px;
      line-height: 1.6;
      color: rgba(var(--ink-rgb), 0.78);
    }

    .theme-card-picks {
      margin: 0;
      padding: 0;
      list-style: none;
      display: grid;
      gap: 6px;
    }

    .theme-card-picks a {
      font-size: 13.5px;
      line-height: 1.5;
      color: var(--ink);
      text-decoration: none;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

    .theme-card-picks a::before {
      content: "→ ";
      color: rgba(var(--ink-rgb), 0.55);
    }

    .theme-card-picks a:hover,
    .theme-card-picks a:focus-visible {
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .news-sections {
      display: grid;
      gap: clamp(34px, 5vw, 58px);
    }

    .news-category {
      display: grid;
      gap: 18px;
    }

    .news-category-head {
      display: flex;
      flex-wrap: wrap;
      align-items: baseline;
      gap: 12px 22px;
      padding-bottom: 14px;
      border-bottom: 1px solid rgba(var(--ink-rgb), 0.22);
    }

    .news-category-label {
      color: var(--signal);
      font-family: var(--font-mono);
      font-size: 12px;
      font-weight: 780;
      letter-spacing: 0.08em;
      text-transform: uppercase;
    }

    .news-category-head :is(h2, h3) {
      margin: 0;
      font-size: clamp(20px, 2vw, 26px);
      font-weight: 820;
      line-height: 1.08;
      letter-spacing: 0.01em;
    }

    .news-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(min(270px, 100%), 1fr));
      border-top: 1px solid var(--ink);
      border-left: 1px solid var(--ink);
    }

    .news-item {
      display: grid;
      min-height: 260px;
      padding: 18px;
      border-right: 1px solid var(--ink);
      border-bottom: 1px solid var(--ink);
      background: var(--card-gradient);
    }

    .news-item[hidden] { display: none; }

    .news-item.is-filtered-out,
    .catalog-card.is-collapsed,
    .catalog-card.is-filtered-out {
      display: none;
    }

    .news-thumb {
      display: block;
      margin-bottom: 14px;
      overflow: hidden;
      border: 1px solid rgba(var(--ink-rgb), 0.18);
      background: rgba(var(--ink-rgb), 0.05);
    }

    .news-thumb img {
      display: block;
      width: 100%;
      aspect-ratio: 16 / 9;
      height: auto;
      object-fit: cover;
      transition: transform 0.32s ease;
    }

    .news-item:hover .news-thumb img,
    .news-item:focus-within .news-thumb img {
      transform: scale(1.035);
    }

    .news-item time,
    .news-source {
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 780;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .news-item time { color: var(--signal); }

    .news-meta {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 8px;
    }

    .news-tag {
      display: inline-flex;
      align-items: center;
      padding: 0 6px;
      border: 1px solid var(--ink);
      color: var(--ink);
      font-family: var(--font-mono);
      font-size: 9px;
      font-weight: 780;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .news-topic-tags,
    .archive-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 5px;
    }

    .news-topic-tags {
      margin-top: 9px;
    }

    .news-topic-tags span,
    .archive-tags span {
      display: inline-flex;
      align-items: center;
      min-height: 22px;
      padding: 2px 7px;
      border: 1px solid rgba(var(--ink-rgb), 0.34);
      background: rgba(var(--surface-rgb), 0.72);
      color: var(--ink);
      font-family: var(--font-mono);
      font-size: 9px;
      font-weight: 820;
      letter-spacing: 0.06em;
      line-height: 1.1;
      text-transform: uppercase;
    }

    .news-item h3 {
      margin: 12px 0 10px;
      font-size: 17px;
      font-weight: 820;
      line-height: 1.34;
      letter-spacing: 0.01em;
    }

    .news-item h3 a { overflow-wrap: anywhere; }

    .news-item h3 a:hover,
    .news-item h3 a:focus-visible {
      color: var(--signal);
      outline: none;
    }

    .news-summary {
      margin: 0 0 12px;
      color: var(--muted);
      font-size: 13.5px;
      line-height: 1.6;
      font-weight: 450;
    }

    .news-source {
      align-self: end;
      color: var(--ink);
    }

    .news-actions[hidden] { display: none; }

    .research-cta {
      display: grid;
      grid-template-columns: minmax(0, 1fr) minmax(280px, 360px);
      gap: clamp(24px, 5vw, 54px);
      align-items: center;
      max-width: 980px;
      margin: 48px auto 0;
      padding: clamp(28px, 5vw, 48px);
      border: 1px solid var(--ink);
      border-top: 4px solid var(--signal);
      background: var(--ink);
      color: var(--paper);
    }

    .research-cta-copy {
      display: grid;
      gap: 10px;
    }

    .research-cta-kicker {
      margin: 0;
      color: #7cbcff;
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 820;
      letter-spacing: 0.12em;
      text-transform: uppercase;
    }

    .research-cta h2 {
      margin: 0;
      color: var(--paper);
      font-size: clamp(24px, 3vw, 34px);
      line-height: 1.25;
    }

    .research-cta-description {
      margin: 0;
      color: rgba(248, 247, 242, 0.76);
      font-size: 14px;
      line-height: 1.7;
    }

    .research-cta-actions {
      display: grid;
      gap: 14px;
    }

    .research-cta-primary {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      min-height: 52px;
      padding: 12px 16px;
      border: 1px solid var(--signal);
      background: var(--signal);
      color: var(--paper);
      font-size: 14px;
      font-weight: 820;
      line-height: 1.45;
      text-decoration: none;
      transition: background 0.2s ease, border-color 0.2s ease;
    }

    .research-cta-primary:hover,
    .research-cta-primary:focus-visible {
      border-color: #7cbcff;
      background: #084f9f;
      outline: 2px solid #7cbcff;
      outline-offset: 3px;
    }

    .research-cta-secondary {
      margin: 0;
      color: rgba(248, 247, 242, 0.72);
      font-size: 13px;
      line-height: 1.65;
    }

    .research-cta-secondary a {
      color: var(--paper);
      font-weight: 760;
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .research-cta-secondary a:hover,
    .research-cta-secondary a:focus-visible {
      color: #7cbcff;
      outline: none;
    }

    .site-footer {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      gap: 10px 16px;
      padding: 18px clamp(20px, 4vw, 58px);
      background: var(--footer-gradient);
      box-shadow: inset 0 1px 0 rgba(var(--ink-rgb), 0.08);
      color: var(--muted);
      font-family: var(--font-mono);
      font-size: 11px;
      font-weight: 850;
      letter-spacing: 0.04em;
      text-transform: uppercase;
    }

    .site-footer a:hover,
    .site-footer a:focus-visible {
      color: var(--signal);
      outline: none;
    }

    .article-catalog {
      margin-top: clamp(34px, 5vw, 58px);
      display: grid;
      gap: 18px;
    }

    .archive-list {
      list-style: none;
      margin: 0;
      padding: 0;
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      border-top: 1px solid var(--ink);
      border-left: 1px solid var(--ink);
    }

    .archive-list li {
      display: flex;
      flex-direction: column;
      min-height: 300px;
      border-right: 1px solid var(--ink);
      border-bottom: 1px solid var(--ink);
      background: var(--card-gradient);
    }

    .archive-thumb {
      display: block;
      overflow: hidden;
      border-bottom: 1px solid rgba(var(--ink-rgb), 0.2);
      background: rgba(var(--ink-rgb), 0.05);
    }

    .archive-thumb img {
      display: block;
      width: 100%;
      aspect-ratio: 16 / 9;
      height: auto;
      object-fit: cover;
      transition: transform 0.32s ease;
    }

    .catalog-card:hover .archive-thumb img,
    .catalog-card:focus-within .archive-thumb img {
      transform: scale(1.035);
    }

    .archive-card-body {
      display: grid;
      align-content: start;
      gap: 9px;
      padding: 14px;
      flex: 1;
    }

    .archive-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 4px 10px;
      align-items: center;
    }

    .archive-list time,
    .archive-kind {
      color: var(--muted);
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 780;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }

    .archive-list time { color: var(--signal); }

    .archive-kind {
      display: inline-flex;
      align-items: center;
      padding: 0 6px;
      border: 1px solid var(--ink);
      color: var(--ink);
      font-size: 9px;
    }

    .archive-title {
      font-size: 15px;
      font-weight: 820;
      line-height: 1.42;
      overflow-wrap: anywhere;
    }

    .archive-title:hover,
    .archive-title:focus-visible {
      color: var(--signal);
      outline: none;
    }

    .archive-source {
      color: var(--muted);
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 780;
      letter-spacing: 0.05em;
      text-transform: uppercase;
    }

    .catalog-actions {
      display: flex;
      justify-content: center;
      padding-top: 20px;
    }

    .catalog-more {
      position: relative;
      display: inline-grid;
      grid-template-columns: auto auto;
      grid-template-areas:
        "kicker arrow"
        "main arrow";
      align-items: center;
      gap: 2px 18px;
      min-width: min(100%, 360px);
      min-height: 74px;
      padding: 14px 18px;
      border: 1px solid var(--ink);
      background:
        linear-gradient(90deg, var(--signal) 0 4px, transparent 4px),
        var(--card-gradient);
      color: var(--ink);
      text-align: left;
      cursor: pointer;
      transition:
        border-color 0.22s ease,
        background-color 0.22s ease,
        color 0.22s ease,
        transform 0.22s ease;
    }

    .catalog-more::after {
      content: "";
      position: absolute;
      inset: 6px;
      border: 1px solid rgba(var(--ink-rgb), 0.12);
      pointer-events: none;
    }

    .catalog-more:hover,
    .catalog-more:focus-visible {
      border-color: var(--signal);
      background:
        linear-gradient(90deg, var(--signal) 0 4px, transparent 4px),
        var(--card-hover-gradient);
      color: var(--signal);
      outline: none;
      transform: translateY(-2px);
    }

    .catalog-more-kicker,
    .catalog-more-count {
      font-family: var(--font-mono);
      font-size: 10px;
      font-weight: 820;
      letter-spacing: 0.08em;
      line-height: 1;
      text-transform: uppercase;
    }

    .catalog-more-kicker {
      grid-area: kicker;
      color: var(--signal);
    }

    .catalog-more-main {
      grid-area: main;
      display: flex;
      flex-wrap: wrap;
      align-items: baseline;
      gap: 8px;
      font-size: 16px;
      font-weight: 850;
      letter-spacing: 0.01em;
      line-height: 1.25;
    }

    .catalog-more-count {
      color: var(--muted);
    }

    .catalog-more-arrow {
      grid-area: arrow;
      display: grid;
      place-items: center;
      width: 38px;
      height: 38px;
      margin-left: auto;
      border: 1px solid currentColor;
      font-family: var(--font-mono);
      font-size: 18px;
      line-height: 1;
      transition: transform 0.22s ease;
    }

    .catalog-more:hover .catalog-more-arrow,
    .catalog-more:focus-visible .catalog-more-arrow {
      transform: translateY(2px);
    }

    .catalog-more[hidden] {
      display: none;
    }

    html[data-color-mode="dark"] body {
      background: var(--page);
      color: var(--ink);
    }

    html[data-color-mode="dark"] .site-header {
      background: #091722;
      box-shadow: inset 0 -1px 0 rgba(var(--ink-rgb), 0.16);
    }

    html[data-color-mode="dark"] .site-header .brand-lockup,
    html[data-color-mode="dark"] .site-header .brand-symbol,
    html[data-color-mode="dark"] .site-header .brand-wordmark {
      filter: brightness(0) invert(1);
    }

    html[data-color-mode="dark"] .site-header .nav-menu {
      border-color: rgba(var(--ink-rgb), 0.42);
      background: var(--surface);
      box-shadow: 0 18px 34px rgba(0, 0, 0, 0.42);
    }

    html[data-color-mode="dark"] .site-header .nav-group:hover .nav-trigger,
    html[data-color-mode="dark"] .site-header .nav-group:focus-within .nav-trigger,
    html[data-color-mode="dark"] .site-header .nav-group.is-open .nav-trigger,
    html[data-color-mode="dark"] .site-header .nav-direct:hover,
    html[data-color-mode="dark"] .site-header .nav-direct:focus-visible {
      border-color: rgba(124, 188, 255, 0.52);
    }

    html[data-color-mode="dark"] .site-header .translate-slot select {
      border-color: rgba(var(--ink-rgb), 0.3);
      background-color: rgba(var(--surface-rgb), 0.92);
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='6' height='4' viewBox='0 0 6 4'%3E%3Cpath d='M0 0h6L3 4z' fill='%23edf4fa'/%3E%3C/svg%3E");
    }

    html[data-color-mode="dark"] .site-header .translate-slot select:hover,
    html[data-color-mode="dark"] .site-header .translate-slot select:focus-visible,
    html[data-color-mode="dark"] .site-header .translate-slot option {
      background-color: var(--surface);
    }

    html[data-color-mode="dark"] .translation-archive {
      background: var(--surface);
    }

    html[data-color-mode="dark"] .translation-archive-link,
    html[data-color-mode="dark"] .explore-input-wrap button {
      border-color: #0b63ce;
      background: #0b63ce;
      color: #ffffff;
    }

    html[data-color-mode="dark"] .explore-input-wrap,
    html[data-color-mode="dark"] .explore-empty,
    html[data-color-mode="dark"] .reading-guide-list a,
    html[data-color-mode="dark"] .theme-card {
      background: var(--surface);
    }

    html[data-color-mode="dark"] .reading-guide-list a:hover,
    html[data-color-mode="dark"] .reading-guide-list a:focus-visible {
      background: #143149;
    }

    html[data-color-mode="dark"] .news-item,
    html[data-color-mode="dark"] .archive-list li {
      background: var(--card-gradient);
    }

    html[data-color-mode="dark"] .research-cta {
      border-color: #2b4154;
      border-top-color: #7cbcff;
      background:
        radial-gradient(circle at 90% 20%, rgba(11, 99, 206, 0.42), transparent 38%),
        #06131f;
      color: #ffffff;
    }

    html[data-color-mode="dark"] .research-cta h2,
    html[data-color-mode="dark"] .research-cta-primary,
    html[data-color-mode="dark"] .research-cta-secondary a {
      color: #ffffff;
    }

    html[data-color-mode="dark"] .site-footer {
      background: var(--footer-gradient);
    }

    @media (max-width: 1020px) {
      .archive-list {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }
    }

    @media (max-width: 760px) {
      .site-header {
        align-items: flex-start;
        padding: 16px 20px 12px;
      }

      .brand-symbol { width: 36px; }
      .brand-wordmark { width: 96px; }

      .back-link {
        margin-left: auto;
        padding-top: 9px;
        font-size: 10px;
      }

      main {
        padding: 42px 20px 72px;
      }

      h1 {
        font-size: clamp(32px, 10vw, 42px);
      }

      .research-lead {
        margin-bottom: 30px;
      }

      .explore-panel {
        grid-template-columns: 1fr;
        gap: 18px;
        margin-bottom: 34px;
      }

      .explore-input-wrap {
        grid-template-columns: minmax(0, 1fr) 48px;
      }

      .explore-input-wrap input {
        font-size: 16px;
      }

      .explore-tags {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .explore-chip {
        min-width: 0;
        width: 100%;
      }

      .reading-guide,
      .theme-guide {
        margin-bottom: 24px;
      }

      .reading-guide {
        grid-template-columns: 1fr;
        gap: 12px;
        padding: 16px 0;
      }

      .reading-guide-list,
      .news-list {
        grid-template-columns: 1fr;
      }

      .reading-guide-list a {
        grid-template-columns: auto minmax(0, 1fr);
        align-items: center;
        gap: 12px;
        min-height: 0;
        padding: 12px 14px;
      }

      .reading-guide-list span { font-size: 13px; }

      .theme-guide-summary {
        grid-template-columns: auto minmax(0, 1fr);
        gap: 10px 14px;
      }

      .theme-guide-summary-action {
        grid-column: 1 / -1;
        justify-content: space-between;
        width: 100%;
        padding-top: 8px;
        border-top: 1px solid rgba(var(--ink-rgb), 0.14);
      }

      .research-cta {
        grid-template-columns: 1fr;
        gap: 24px;
      }

      .news-category-head {
        align-items: flex-start;
      }

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

      .archive-list li { min-height: 0; }

      .archive-card-body {
        gap: 7px;
        padding: 10px;
      }

      .archive-title {
        font-size: 13px;
        line-height: 1.4;
        display: -webkit-box;
        -webkit-box-orient: vertical;
        -webkit-line-clamp: 3;
        overflow: hidden;
      }

      .archive-tags { display: none; }

      .archive-list time,
      .archive-kind { font-size: 9px; }
    }