:root {
        color-scheme: light;
        --brand: #fe4a26;
        --brand-deep: #d63c12;
        --brand-chip: #c13710;
        --brand-tint: #ffe9e2;
        --brand-wash: #fff5f1;
        --ink: #201e1b;
        --ink-2: #57534c;
        --ink-3: #6e6960;
        --paper: #ffffff;
        --paper-warm: #faf8f5;
        --term: #f4f0ea;
        --line: #e8e3dc;
        --line-soft: #f0ece6;
        --line-strong: #d9d3ca;
      }
      * {
        box-sizing: border-box;
      }
      html {
        -webkit-text-size-adjust: 100%;
      }
      body {
        margin: 0;
        font-family: "Hiragino Sans", "Hiragino Kaku Gothic ProN", "BIZ UDPGothic",
          "Yu Gothic Medium", "Yu Gothic", "Noto Sans JP", Meiryo, sans-serif;
        font-size: 16px;
        line-height: 1.8;
        background: var(--paper);
        color: var(--ink);
        -webkit-font-smoothing: antialiased;
      }
      body::before {
        content: "";
        display: block;
        height: 4px;
        background: linear-gradient(90deg, var(--brand) 0 64px, var(--ink) 64px);
      }
      p {
        margin: 0;
        overflow-wrap: anywhere;
      }
      a {
        color: var(--brand-deep);
        text-decoration-thickness: 1px;
        text-underline-offset: 3px;
      }
      a:hover {
        text-decoration-thickness: 2px;
      }
      :focus-visible {
        outline: 2px solid var(--brand);
        outline-offset: 2px;
        border-radius: 2px;
      }
      .ui {
        background: var(--term);
        border-radius: 4px;
        padding: 1px 4px;
        font-weight: 600;
        font-size: 0.95em;
      }
      .brand-mark {
        display: inline-grid;
        grid-template-columns: 6px 6px;
        grid-auto-rows: 6px;
        gap: 1.5px;
        flex: none;
      }
      .brand-mark i {
        background: var(--ink);
        border-radius: 1px;
      }
      .brand-mark i:first-child {
        background: var(--brand);
        transform: skewX(-10deg);
      }
      .masthead {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 18px 0 14px;
        border-bottom: 1px solid var(--line);
      }
      .brand {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        min-width: 0;
        color: inherit;
        text-decoration: none;
      }
      .brand-name {
        font-size: 13px;
        font-weight: 800;
        letter-spacing: 0.05em;
        white-space: nowrap;
      }
      .brand-sub {
        font-size: 12px;
        color: var(--ink-3);
        letter-spacing: 0.06em;
        white-space: nowrap;
      }
      main {
        counter-reset: sec;
      }
      main > section {
        margin-top: 48px;
        counter-increment: sec;
      }
      main > section > h2 {
        display: flex;
        align-items: center;
        gap: 12px;
        margin: 0 0 20px;
        font-size: 17px;
        font-weight: 800;
        letter-spacing: 0.03em;
        font-feature-settings: "palt";
        line-height: 1.5;
        scroll-margin-top: 16px;
      }
      main > section > h2::before {
        content: counter(sec, decimal-leading-zero);
        font-size: 12.5px;
        font-weight: 800;
        letter-spacing: 0.1em;
        color: var(--brand-deep);
        font-variant-numeric: tabular-nums;
        transform: translateY(1px);
        flex: none;
      }
      main > section > h2::after {
        content: "";
        flex: 1 1 24px;
        height: 1px;
        background: var(--line);
        min-width: 24px;
      }
      .colophon {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        margin-top: 56px;
        padding-top: 16px;
        border-top: 1px solid var(--line);
        font-size: 11.5px;
        color: var(--ink-3);
        letter-spacing: 0.04em;
      }
      .colophon .brand-name {
        font-size: 11.5px;
        color: var(--ink-2);
      }
      .colophon-updated {
        font-variant-numeric: tabular-nums;
        white-space: nowrap;
      }
      .layout {
        display: grid;
        grid-template-columns: 200px minmax(0, 720px);
        gap: 48px;
        justify-content: center;
      }
      .content {
        min-width: 0;
      }
      .layout--single,
      html.embedded .layout {
        display: block;
        max-width: 720px;
        margin: 0 auto;
      }
      html.embedded .side {
        display: none;
      }
      .side {
        min-width: 0;
      }
      .side-inner {
        position: sticky;
        top: 20px;
        max-height: calc(100vh - 40px);
        overflow-y: auto;
        padding: 26px 0 8px;
      }
      .side-label {
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.14em;
        color: var(--ink-3);
        margin: 0 0 10px;
        padding-left: 10px;
      }
      .side-group + .side-group {
        margin-top: 2px;
      }
      .side-cat {
        display: block;
        font-size: 13.5px;
        font-weight: 700;
        color: var(--ink-2);
        text-decoration: none;
        padding: 7px 10px;
        border-radius: 6px;
        transition: background-color 0.15s ease, color 0.15s ease;
      }
      .side-cat:hover {
        color: var(--brand-deep);
        background: var(--paper-warm);
      }
      .side-group.is-current > .side-cat {
        color: var(--ink);
      }
      .side-list {
        list-style: none;
        margin: 2px 0 8px 10px;
        padding: 0 0 0 10px;
        border-left: 1px solid var(--line);
      }
      .side-link {
        display: block;
        font-size: 12.5px;
        font-weight: 500;
        line-height: 1.55;
        color: var(--ink-2);
        text-decoration: none;
        padding: 6px 10px;
        border-radius: 6px;
        position: relative;
        transition: background-color 0.15s ease, color 0.15s ease;
      }
      .side-link:hover {
        color: var(--brand-deep);
        background: var(--paper-warm);
      }
      .side-link.is-active {
        color: var(--brand-deep);
        font-weight: 700;
        background: var(--brand-wash);
      }
      .side-link.is-active::before {
        content: "";
        position: absolute;
        left: -11px;
        top: 6px;
        bottom: 6px;
        width: 2px;
        background: var(--brand);
      }
      @media (max-width: 999px) {
        .side {
          display: none;
        }
        .layout {
          display: block;
          max-width: 720px;
          margin: 0 auto;
        }
      }
      @media (prefers-reduced-motion: reduce) {
        * {
          transition: none !important;
          scroll-behavior: auto !important;
        }
      }


      html {
        scroll-behavior: smooth;
      }
      .page {
        max-width: 1040px;
        margin: 0 auto;
        padding: 0 28px 40px;
      }
      .hero {
        padding: 44px 0 8px;
      }
      .hero h1 {
        margin: 0;
        font-size: 36px;
        font-weight: 800;
        line-height: 1.3;
        letter-spacing: 0.02em;
        font-feature-settings: "palt";
      }
      .hero h1::after {
        content: "";
        display: block;
        width: 64px;
        height: 4px;
        background: var(--brand);
        margin-top: 16px;
      }
      .hero-lead {
        font-size: 15px;
        color: var(--ink-2);
        margin: 18px 0 24px;
        max-width: 44em;
      }
      .hero-kicker {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        margin-bottom: 10px;
        color: var(--brand-deep);
        font-size: 12px;
        font-weight: 800;
        letter-spacing: 0.12em;
      }
      .hero-kicker::before {
        content: "";
        width: 22px;
        height: 2px;
        background: var(--brand);
      }
      .search {
        position: relative;
        max-width: 560px;
      }
      .search-input {
        width: 100%;
        font: inherit;
        font-size: 15px;
        line-height: 1.5;
        padding: 13px 16px 13px 44px;
        border: 1.5px solid var(--line-strong);
        border-radius: 10px;
        background: var(--paper);
        color: var(--ink);
        transition: border-color 0.15s ease, box-shadow 0.15s ease;
      }
      .search-input::placeholder {
        color: var(--ink-3);
      }
      .search-input:focus {
        outline: none;
        border-color: var(--brand);
        box-shadow: 0 0 0 3px var(--brand-tint);
      }
      .search-icon {
        position: absolute;
        left: 15px;
        top: 50%;
        width: 16px;
        height: 16px;
        transform: translateY(-50%);
        border: 2px solid var(--ink-3);
        border-radius: 50%;
        pointer-events: none;
      }
      .search-icon::after {
        content: "";
        position: absolute;
        right: -5px;
        bottom: -4px;
        width: 7px;
        height: 2px;
        background: var(--ink-3);
        border-radius: 2px;
        transform: rotate(45deg);
      }
      .search-empty {
        margin: 24px 0 0;
        font-size: 14px;
        color: var(--ink-2);
      }
      .cat-jump {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        margin-top: 20px;
      }
      .cat-jump a {
        display: inline-block;
        font-size: 12.5px;
        font-weight: 700;
        color: var(--ink-2);
        text-decoration: none;
        border: 1px solid var(--line-strong);
        border-radius: 999px;
        padding: 7px 14px;
        transition: border-color 0.15s ease, color 0.15s ease, background-color 0.15s ease;
      }
      .cat-jump a:hover {
        border-color: var(--brand);
        color: var(--brand-deep);
        background: var(--brand-wash);
      }
      .sec-desc {
        margin: -8px 0 16px;
        font-size: 14px;
        color: var(--ink-2);
        max-width: 44em;
      }
      .sec-articles {
        list-style: none;
        margin: 0;
        padding: 0;
      }
      .sec-articles .feat {
        margin-bottom: 6px;
      }
      .feature {
        display: flex;
        align-items: center;
        gap: 16px;
        padding: 18px 20px;
        border: 1px solid var(--line);
        border-radius: 10px;
        text-decoration: none;
        color: var(--ink);
        background: var(--paper);
        transition: border-color 0.15s ease, background-color 0.15s ease;
      }
      .feature:hover {
        border-color: var(--brand);
        background: var(--brand-wash);
      }
      .feature-body {
        display: flex;
        flex-direction: column;
        gap: 5px;
        min-width: 0;
      }
      .feature-title {
        font-size: 16.5px;
        font-weight: 700;
        line-height: 1.55;
        letter-spacing: 0.01em;
        font-feature-settings: "palt";
      }
      .feature-summary {
        font-size: 13px;
        line-height: 1.75;
        color: var(--ink-2);
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
      }
      .card-meta {
        padding-top: 3px;
        font-size: 11.5px;
        color: var(--ink-3);
        font-variant-numeric: tabular-nums;
      }
      .card-meta .card-kind {
        color: var(--brand-deep);
        font-weight: 700;
      }
      .feature-arrow {
        margin-left: auto;
        color: var(--line-strong);
        font-size: 18px;
        flex: none;
        transition: color 0.15s ease, transform 0.15s ease;
      }
      .feature:hover .feature-arrow {
        color: var(--brand);
        transform: translateX(2px);
      }
      .sec-articles .row + .row {
        border-top: 1px solid var(--line-soft);
      }
      .rowlink {
        display: flex;
        align-items: baseline;
        gap: 14px;
        padding: 12px 4px;
        color: var(--ink);
        text-decoration: none;
      }
      .row-title {
        font-size: 14.5px;
        font-weight: 600;
        line-height: 1.6;
      }
      .row-meta {
        margin-left: auto;
        font-size: 12px;
        color: var(--ink-3);
        white-space: nowrap;
        font-variant-numeric: tabular-nums;
      }
      .rowlink:hover .row-title {
        color: var(--brand-deep);
        text-decoration: underline;
        text-underline-offset: 3px;
      }
      .search-count {
        margin: 12px 0 0;
        font-size: 13px;
        color: var(--ink-2);
      }
      main > section.journey-section {
        counter-increment: none;
        margin-top: 34px;
        padding: 24px;
        border: 1px solid #eadfd8;
        border-radius: 16px;
        background:
          radial-gradient(circle at 95% 4%, rgba(254, 74, 38, 0.12), transparent 35%),
          linear-gradient(145deg, #fffaf7, #fff 58%);
        box-shadow: 0 14px 40px rgba(73, 44, 31, 0.08);
      }
      main > section.journey-section > h2 {
        margin-bottom: 10px;
        padding: 0;
        border: 0;
        background: none;
        box-shadow: none;
        font-size: 21px;
      }
      main > section.journey-section > h2::before {
        content: "START";
        width: auto;
        min-width: 0;
        height: auto;
        padding: 4px 8px;
        border: 0;
        border-radius: 999px;
        background: var(--brand);
        color: #fff;
        font-size: 10px;
        letter-spacing: 0.1em;
      }
      .journey-lead {
        max-width: 46em;
        color: var(--ink-2);
        font-size: 14px;
      }
      .journey-instruction {
        display: inline-flex;
        margin: 10px 0 0;
        padding: 6px 10px;
        align-items: center;
        gap: 7px;
        border: 1px solid #d8e1e7;
        border-radius: 7px;
        background: #f5f8fa;
        color: var(--ink-2);
        font-size: 12px;
        font-weight: 700;
        line-height: 1.55;
      }
      .journey-instruction::before {
        content: "↗";
        color: var(--brand-chip);
        font-weight: 900;
      }
      .identity-callout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 12px 22px;
        align-items: center;
        margin-top: 18px;
        padding: 17px 18px;
        border: 1px solid #efb7a5;
        border-left: 5px solid var(--brand);
        border-radius: 12px;
        background: #fff3ee;
      }
      .identity-callout-label {
        margin: 0 0 4px;
        color: var(--brand-chip);
        font-size: 10.5px;
        font-weight: 900;
        letter-spacing: 0.08em;
      }
      .identity-callout h3 {
        margin: 0 0 5px;
        font-size: 16px;
        line-height: 1.45;
      }
      .identity-callout p:last-child {
        color: var(--ink-2);
        font-size: 12.5px;
        line-height: 1.65;
      }
      .identity-callout-actions {
        display: flex;
        flex-direction: column;
        gap: 7px;
        min-width: 200px;
      }
      .identity-callout-action-label {
        color: var(--ink-2);
        font-size: 10.5px;
        font-weight: 800;
        letter-spacing: 0.04em;
      }
      .identity-callout-actions a {
        display: flex;
        min-height: 44px;
        padding: 8px 11px 8px 12px;
        align-items: center;
        justify-content: space-between;
        gap: 10px;
        border: 1px solid #e7b09f;
        border-radius: 8px;
        background: #fff;
        color: var(--brand-chip);
        font-size: 12px;
        font-weight: 800;
        text-decoration: none;
        cursor: pointer;
        box-shadow: 0 2px 7px rgba(73, 44, 31, 0.06);
      }
      .identity-callout-actions a::after {
        content: "→";
        flex: 0 0 auto;
        font-size: 15px;
      }
      .identity-callout-actions a:hover {
        border-color: var(--brand);
        background: #fffaf7;
      }
      .identity-callout-actions a:focus-visible {
        outline: 3px solid rgba(254, 74, 38, 0.28);
        outline-offset: 2px;
      }
      .journey-flow {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 10px;
        margin: 20px 0 0;
        padding: 0;
        list-style: none;
      }
      .journey-step {
        position: relative;
        min-width: 0;
        padding: 16px 16px 15px 50px;
        border: 1px solid var(--line);
        border-radius: 12px;
        background: rgba(255, 255, 255, 0.94);
        cursor: default;
      }
      .journey-step--identity {
        grid-column: 1 / -1;
        border-color: #efb7a5;
        background: #fff3ee;
      }
      .journey-number {
        position: absolute;
        top: 15px;
        left: 15px;
        display: grid;
        width: 26px;
        height: 26px;
        place-items: center;
        border-radius: 50%;
        background: var(--ink);
        color: #fff;
        font-size: 12px;
        font-weight: 800;
        font-variant-numeric: tabular-nums;
      }
      .journey-step--identity .journey-number {
        background: var(--brand);
      }
      .journey-step h3 {
        margin: 0 0 5px;
        font-size: 15px;
        line-height: 1.45;
      }
      .journey-step p {
        color: var(--ink-2);
        font-size: 12.5px;
        line-height: 1.65;
      }
      .journey-links {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
        gap: 7px;
        margin-top: 12px;
        padding-top: 10px;
        border-top: 1px solid #eee3dc;
      }
      .journey-links-label {
        grid-column: 1 / -1;
        color: var(--ink-2);
        font-size: 10.5px;
        font-weight: 800;
        letter-spacing: 0.04em;
      }
      .journey-links a {
        display: flex;
        min-height: 44px;
        padding: 8px 10px 8px 11px;
        align-items: center;
        justify-content: space-between;
        gap: 9px;
        border: 1px solid #dbcfc7;
        border-radius: 8px;
        background: #fff;
        color: var(--brand-chip);
        font-size: 12px;
        font-weight: 800;
        line-height: 1.45;
        text-decoration: none;
        cursor: pointer;
        box-shadow: 0 2px 7px rgba(73, 44, 31, 0.055);
      }
      .journey-links a::after {
        content: "→";
        flex: 0 0 auto;
        font-size: 15px;
      }
      .journey-links a:hover {
        border-color: var(--brand);
        background: var(--brand-wash);
      }
      .journey-links a:focus-visible {
        outline: 3px solid rgba(254, 74, 38, 0.28);
        outline-offset: 2px;
      }
      .journey-priority {
        display: inline-block;
        margin-bottom: 6px;
        padding: 2px 7px;
        border-radius: 999px;
        background: #fff;
        color: var(--brand-chip);
        font-size: 10.5px;
        font-weight: 800;
      }
      .article-index-intro {
        margin: 48px 0 -18px;
        scroll-margin-top: 16px;
      }
      .article-index-kicker {
        color: var(--brand-deep);
        font-size: 11px;
        font-weight: 800;
        letter-spacing: 0.14em;
      }
      .article-index-intro h2 {
        margin: 4px 0 5px;
        font-size: 23px;
        line-height: 1.4;
      }
      .article-index-intro p:last-child {
        color: var(--ink-2);
        font-size: 14px;
      }
      .side-cat--journey {
        margin-bottom: 8px;
        background: var(--brand-wash);
        color: var(--brand-deep);
      }
      @media (max-width: 640px) {
        .page {
          padding: 0 18px 32px;
        }
        .hero h1 {
          font-size: 27px;
        }
        .row-meta {
          display: none;
        }
        main > section.journey-section {
          padding: 18px 15px;
        }
        main > section.journey-section > h2 {
          align-items: flex-start;
          font-size: 18px;
        }
        .journey-flow {
          grid-template-columns: 1fr;
        }
        .identity-callout {
          grid-template-columns: 1fr;
        }
        .identity-callout-actions {
          min-width: 0;
        }
        .identity-callout-actions a {
          min-height: 44px;
          align-content: center;
        }
        .journey-instruction {
          display: flex;
        }
        .journey-links {
          grid-template-columns: 1fr;
        }
        .journey-step--identity {
          grid-column: auto;
        }
      }