@layer reset, base, layout, components, responsive;

@layer reset {
  *, *::before, *::after { box-sizing: border-box; }
  body, h1, h2, h3, p { margin: 0; }
  button, input { font: inherit; }
  button, a { -webkit-tap-highlight-color: transparent; touch-action: manipulation; }
  a { color: inherit; text-decoration: none; }
  button { cursor: pointer; }
  svg, img { display: block; }
  [hidden] { display: none !important; }
}
@layer base {
  :root {
    --paper: #f7f8f2;
    --surface: #fff;
    --ink: #253b32;
    --green: #294b3b;
    --muted: #5f6c63;
    --line: #d8ddd3;
    --lime: #ddebbe;
    --subtle: #eef1e8;
    --focus: #385e43;
    --radius: 10px;
    --ease: cubic-bezier(.2,.65,.3,1);
    --motion: 180ms;
    --gutter: clamp(22px, 5vw, 80px);
    --font: 'Helvetica Neue', Arial, 'PingFang TC', 'Microsoft JhengHei', sans-serif;
  }
  html { scroll-behavior: smooth; scroll-padding-top: 100px; }
  body { color: var(--ink); background: var(--paper); font-family: var(--font); font-size: 16px; line-height: 1.6; -webkit-font-smoothing: antialiased; }
  ::selection { color: var(--ink); background: var(--lime); }
  :focus-visible { outline: 3px solid var(--focus); outline-offset: 5px; border-radius: 3px; }
  h1, h2, h3 { font-weight: 500; line-height: 1.2; text-wrap: balance; }
  h1 { font-size: clamp(46px, 5.35vw, 82px); letter-spacing: -.065em; }
  h2 { font-size: clamp(30px, 3.1vw, 44px); letter-spacing: -.045em; }
  h3 { letter-spacing: -.025em; }
  p { text-wrap: pretty; }
  .icon { width: 22px; height: 22px; flex: 0 0 22px; }
  .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; border: 0; }
  .skip-link { position: fixed; left: 24px; top: -100px; padding: 12px 24px; z-index: 100; background: var(--ink); color: white; border-radius: 6px; }
  .skip-link:focus { top: 12px; }
  .eyebrow, .small-label { font-size: 11px; letter-spacing: .12em; font-weight: 600; }
  .eyebrow { margin-bottom: 16px; }
  .status-dot { display: inline-block; width: 7px; height: 7px; border-radius: 100%; background: var(--green); flex: 0 0 7px; }
}
@layer layout {
  .container { max-width: 1440px; padding-inline: var(--gutter); margin-inline: auto; }
  .site-header { border-bottom: 1px solid var(--line); background: var(--paper); }
  .header-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; min-height: 100px; }
  .brand { display: inline-flex; flex-shrink: 0; min-height: 44px; align-items: center; }
  .site-title { font-size: 23px; font-weight: 600; letter-spacing: -.035em; line-height: 1.2; }
  .header-inner > nav { display: flex; gap: 34px; align-items: center; }
  .header-inner > nav a { display: flex; align-items: center; min-height: 44px; color: var(--muted); font-size: 13px; }
  .header-inner > nav a:hover, .header-inner > nav a[aria-current] { color: var(--ink); }
  .header-inner > nav a[aria-current]::before { content: ''; width: 5px; height: 5px; border-radius: 50%; background: var(--green); margin-right: 8px; }
  .header-cta { display: inline-flex; align-items: center; gap: 20px; font-size: 13px; border: 1px solid #9da99a; padding: 10px 19px; min-height: 44px; border-radius: 5px; transition: background var(--motion); }
  .header-cta:hover { background: var(--lime); }
  .header-actions { display: flex; align-items: center; gap: 20px; }
  .language-switch { display: flex; align-items: center; gap: 4px; border: 1px solid #a7b09f; border-radius: 5px; padding: 3px; }
  .language-switch a { display: inline-flex; align-items: center; justify-content: center; min-width: 44px; min-height: 44px; padding-inline: 8px; font-size: 12px; color: var(--muted); border-radius: 3px; transition: background var(--motion), color var(--motion); }
  .language-switch a:hover { background: var(--lime); color: var(--ink); }
  .language-switch a[aria-current] { background: var(--green); color: white; }
  html:lang(zh-TW) h1, html:lang(zh-TW) h2, html:lang(zh-TW) h3 { letter-spacing: -.025em; line-height: 1.4; }
  html:lang(zh-TW) .hero h1 { line-height: 1.4; }
  .hero { padding-top: 44px; }
  .hero-eyebrow { display: flex; align-items: center; gap: 10px; font-size: 10px; font-weight: 600; letter-spacing: .15em; }
  .hero-edition { margin-left: auto; font-size: 10px; color: var(--muted); }
  .hero-content { display: grid; grid-template-columns: 1fr 300px; align-items: center; gap: 60px; padding-block: 54px 60px; }
  .hero h1 { max-width: 840px; }
  .headline-accent { color: #647b50; position: relative; white-space: nowrap; }
  .headline-accent > svg { position: absolute; bottom: -10px; left: 0; width: 100%; height: 16px; color: var(--lime); z-index: -1; }
  .hero-aside { padding-top: 16px; }
  .hero-aside .small-label { letter-spacing: .09em; font-size: 11px; text-transform: uppercase; }
  .hero-aside p { color: var(--muted); margin-block: 15px 28px; font-size: 15px; line-height: 1.8; max-width: 310px; }
  .hero-link { display: inline-flex; align-items: center; gap: 14px; font-size: 12px; font-weight: 500; }
  .round-button { display: grid; place-items: center; height: 43px; width: 43px; border-radius: 50%; background: var(--green); color: white; transition: background var(--motion), transform var(--motion); }
  .hero-link:hover .round-button { background: var(--ink); transform: translateY(3px); }
  .hero-bottom { display: flex; align-items: center; gap: 42px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); min-height: 90px; }
  .hero-stat { display: flex; align-items: center; gap: 13px; }
  .hero-stat strong { font-family: Georgia, serif; font-size: 36px; font-weight: 400; line-height: 1; }
  .hero-stat span { font-size: 11px; color: var(--muted); max-width: 65px; line-height: 1.4; }
  .hero-stat + .hero-stat { border-left: 1px solid var(--line); padding-left: 40px; }
  .hero-bottom > p { margin-left: auto; color: var(--muted); font-size: 12px; }
  .mini-star { font-size: 32px; margin-left: 6px; }
  .mini-star svg { width: 30px; height: 30px; }
  .featured-section { padding-top: 64px; padding-bottom: 82px; }
  .section-heading { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; margin-bottom: 32px; }
  .section-heading .eyebrow { color: var(--muted); font-size: 10px; margin-bottom: 12px; }
  .section-heading h2 { font-size: 34px; }
  .section-note { font-size: 12px; color: var(--muted); line-height: 1.7; max-width: 265px; }
  .featured-grid { display: grid; grid-template-columns: 1.25fr 1fr 1fr; gap: 24px; }
  .case-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 34px 26px; }
  .all-cases { padding-block: 72px 80px; border-block: 1px solid var(--line); background: #f1f3eb; scroll-margin-top: 20px; }
  .all-cases .section-heading { margin-bottom: 40px; }
  .approach { display: grid; grid-template-columns: 1fr 1fr; gap: 100px; padding-block: 100px; scroll-margin-top: 20px; }
  .approach-intro .eyebrow { color: var(--muted); }
  .approach-intro h2 { line-height: 1.2; max-width: 490px; }
  .approach-intro > p:not(.eyebrow) { margin-top: 24px; color: var(--muted); font-size: 14px; line-height: 1.8; max-width: 380px; }
  .approach-intro .text-link { margin-top: 32px; }
  .about-wrap { padding-bottom: 80px; scroll-margin-top: 20px; }
  .site-footer { padding-block: 0 24px; }
  .footer-main { display: flex; align-items: center; gap: 32px; padding-block: 28px 32px; }
  .footer-main > p { font-size: 12px; color: var(--muted); }
  .footer-main .back-top { margin-left: auto; font-size: 12px; display: flex; gap: 15px; align-items: center; min-height: 44px; }
  .back-top .icon { transform: rotate(180deg); width: 18px; }
  .footer-bottom { display: flex; justify-content: space-between; gap: 24px; padding-top: 22px; position: relative; color: var(--muted); font-size: 10px; }
  .footer-bottom::before { content: ''; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); border-top: 1px solid var(--line); }
}
@layer components {
  .case-card { min-width: 0; }
  .case-link { display: flex; flex-direction: column; height: 100%; border-radius: var(--radius); }
  .case-art { position: relative; overflow: hidden; border-radius: var(--radius); aspect-ratio: 600 / 350; background: var(--subtle); }
  .case-art > img { width: 100%; height: 100%; object-fit: cover; transition: transform 400ms var(--ease); }
  .featured-grid .case-art { aspect-ratio: auto; height: 230px; }
  .featured-grid .case-art > img { object-fit: cover; }
  .art-arrow { display: flex; align-items: center; justify-content: center; width: 34px; height: 34px; position: absolute; bottom: 15px; right: 15px; background: var(--surface); border-radius: 50%; color: var(--ink); transition: background var(--motion); }
  .art-arrow .icon { width: 18px; height: 18px; flex-basis: 18px; }
  .case-link:hover .case-art > img { transform: scale(1.035); }
  .case-link:hover .art-arrow { background: var(--lime); }
  .case-link:hover h3 { color: #547544; }
  .card-body { display: flex; flex-direction: column; flex: 1; padding-top: 17px; }
  .case-meta { display: flex; align-items: center; justify-content: space-between; font-size: 10px; color: var(--muted); margin-bottom: 10px; }
  .case-meta > span:first-child { display: inline-flex; align-items: center; gap: 6px; }
  .case-meta > span:first-child::before { content: ''; display: inline-block; height: 4px; width: 4px; border-radius: 50%; background: #647b50; }
  .case-number { font-variant-numeric: tabular-nums; letter-spacing: .1em; }
  .client { font-size: 12px; font-weight: 600; margin-bottom: 7px; }
  .case-card h3 { font-size: 24px; line-height: 1.3; max-width: 30ch; transition: color var(--motion); }
  .card-summary { font-size: 13px; color: var(--muted); margin-top: 14px; line-height: 1.7; }
  .card-bottom { display: flex; align-items: flex-end; justify-content: space-between; gap: 10px; margin-top: auto; padding-top: 23px; }
  .tags { display: flex; flex-wrap: wrap; gap: 6px; }
  .tags > span { display: inline-block; font-size: 9px; line-height: 1.5; padding: 4px 8px; border: 1px solid var(--line); border-radius: 4px; color: var(--muted); }
  .read-link { display: flex; gap: 8px; align-items: center; white-space: nowrap; font-size: 10px; }
  .read-link .icon { width: 16px; height: 16px; flex-basis: 16px; }
  .featured-card .read-link { display: none; }
  .index-card { background: var(--surface); border: 1px solid #e2e6dc; border-radius: var(--radius); overflow: hidden; transition: box-shadow var(--motion); }
  .index-card:hover { box-shadow: 0 8px 24px #253b320b; }
  .index-card:focus-within { outline: 3px solid var(--focus); outline-offset: 5px; }
  .index-card .case-art { border-radius: 0; }
  .index-card .card-body { padding: 22px 24px 24px; }
  .index-card h3 { font-size: 22px; }
  .filter-heading { display: flex; justify-content: space-between; align-items: center; gap: 24px; margin-bottom: 20px; }
  .filter-heading > .small-label { color: var(--muted); text-transform: uppercase; letter-spacing: .12em; }
  .search-form { display: flex; align-items: center; gap: 10px; border: 1px solid #a7b09f; border-radius: 5px; padding-left: 14px; min-height: 44px; width: 310px; background: #f9faf6; }
  .search-form > .icon { width: 17px; height: 17px; flex-basis: 17px; color: var(--muted); }
  .search-form:focus-within { outline: 2px solid var(--focus); outline-offset: 2px; }
  .search-form input { border: 0; width: 100%; min-width: 0; padding: 10px 0; outline: none; background: transparent; color: var(--ink); font-size: 12px; }
  .search-form input::-webkit-search-cancel-button { display: none; }
  .search-form input::placeholder { color: var(--muted); }
  .clear-search { border: 0; background: transparent; min-width: 44px; min-height: 44px; font-size: 23px; color: var(--ink); }
  .filters { display: flex; flex-wrap: wrap; gap: 8px; }
  .filter { display: flex; align-items: center; justify-content: center; gap: 9px; padding: 11px 14px; font-size: 11px; line-height: 1.4; border: 1px solid #c9d0c2; background: transparent; border-radius: 5px; color: #4c5e50; min-height: 44px; transition: color var(--motion), background var(--motion), border-color var(--motion); }
  .filter span { font-size: 9px; }
  .filter:hover { background: #e1e8d5; }
  .filter.is-active { border-color: var(--green); background: var(--green); color: white; }
  .catalog-meta { display: flex; justify-content: space-between; align-items: center; gap: 16px; font-size: 11px; color: var(--muted); padding-block: 24px; }
  .catalog-meta > span { font-size: 10px; }
  .source-note { margin-top: 32px; font-size: 11px; color: var(--muted); max-width: 780px; line-height: 1.8; }
  .button { display: inline-flex; align-items: center; justify-content: center; gap: 24px; padding: 14px 22px; border-radius: 5px; border: 1px solid var(--green); background: var(--green); color: white; min-height: 48px; font-size: 13px; transition: background var(--motion), transform var(--motion); }
  .button:hover { background: var(--ink); }
  .button:active { transform: scale(.98); }
  .empty-state { text-align: center; padding: 70px 20px; border: 1px dashed #a7b09f; border-radius: 10px; }
  .empty-mark { display: grid; place-items: center; width: 52px; height: 52px; border-radius: 50%; background: var(--lime); margin: 0 auto 20px; }
  .empty-state h3 { font-size: 28px; }
  .empty-state p { margin: 14px auto 24px; color: var(--muted); }
  .text-link { display: inline-flex; gap: 14px; align-items: center; font-size: 12px; min-height: 44px; }
  .text-link:hover { text-decoration: underline; text-underline-offset: 5px; }
  .approach-steps article { display: flex; gap: 24px; padding-block: 24px; border-top: 1px solid var(--line); }
  .approach-steps article:last-child { border-bottom: 1px solid var(--line); }
  .approach-steps article > span { font-family: Georgia, serif; font-size: 26px; font-style: italic; line-height: 1.3; color: #7c8d6a; }
  .approach-steps h3 { font-size: 20px; margin-bottom: 10px; }
  .approach-steps p { font-size: 13px; color: var(--muted); line-height: 1.8; max-width: 370px; }
  .about-panel { position: relative; overflow: hidden; display: flex; justify-content: space-between; align-items: center; gap: 32px; background: var(--green); color: var(--paper); border-radius: 12px; padding: 55px 64px; }
  .about-panel .eyebrow { font-size: 10px; color: #d5e1ca; }
  .about-panel h2 { font-size: 44px; line-height: 1.15; }
  .about-panel p:not(.eyebrow) { margin-top: 22px; color: #d4dfd1; font-size: 13px; line-height: 1.8; max-width: 440px; }
  .about-panel > div, .about-panel > a { position: relative; z-index: 1; }
  .button-light { background: var(--lime); color: var(--ink); border-color: var(--lime); white-space: nowrap; }
  .button-light:hover { background: #eaf3d6; }
  .button-light:focus-visible { outline-color: white; }
  .article-top { display: flex; justify-content: space-between; align-items: center; padding-top: 34px; gap: 20px; }
  .article-top .eyebrow { margin: 0; font-size: 10px; color: var(--muted); }
  .back-link { display: flex; align-items: center; gap: 10px; min-height: 44px; font-size: 12px; }
  .back-link:hover { text-decoration: underline; text-underline-offset: 4px; }
  .article-hero { display: grid; grid-template-columns: 1.1fr 1fr; align-items: center; gap: 70px; padding-block: 55px 64px; }
  .article-title > .eyebrow { color: var(--muted); font-size: 10px; margin-bottom: 24px; text-transform: uppercase; }
  .article-client { font-size: 16px; font-weight: 500; margin-bottom: 10px; }
  .article-title h1 { font-size: clamp(38px, 4vw, 59px); line-height: 1.08; letter-spacing: -.045em; }
  .article-summary { font-size: 15px; color: var(--muted); margin-block: 25px; max-width: 530px; line-height: 1.8; }
  .article-title .tags span { font-size: 11px; padding: 6px 10px; }
  .article-art { border-radius: var(--radius); overflow: hidden; }
  .article-art > img { width: 100%; height: auto; border-radius: var(--radius); }
  .article-art > p { color: var(--muted); font-size: 10px; text-align: right; padding-top: 10px; }
  .article-layout { display: grid; grid-template-columns: 250px minmax(0, 1fr); gap: 90px; padding-top: 50px; position: relative; }
  .article-layout::before { content: ''; position: absolute; top: 0; left: var(--gutter); right: var(--gutter); border-top: 1px solid var(--line); }
  .article-sidebar { align-self: start; position: sticky; top: 30px; }
  .article-sidebar > .eyebrow { font-size: 10px; color: var(--muted); }
  .article-sidebar nav { display: flex; flex-direction: column; }
  .article-sidebar nav a { display: flex; align-items: center; gap: 14px; min-height: 44px; font-size: 13px; }
  .article-sidebar nav a:hover { color: #5a7644; text-decoration: underline; text-underline-offset: 4px; }
  .article-sidebar nav a > span { color: var(--muted); font-size: 11px; }
  .article-facts { margin-top: 25px; padding-top: 20px; border-top: 1px solid var(--line); }
  .article-facts > span { font-size: 10px; color: var(--muted); }
  .article-facts > p { font-size: 12px; margin-block: 5px 18px; }
  .share-button { display: flex; align-items: center; gap: 15px; background: transparent; border: 1px solid #adb8a6; border-radius: 4px; padding: 10px 14px; color: var(--ink); font-size: 12px; min-height: 44px; }
  .share-button:hover { background: var(--lime); }
  .share-status { margin-top: 12px; font-size: 12px; color: var(--muted); }
  .article-content { max-width: 740px; padding-bottom: 30px; }
  .article-chapter { margin-bottom: 45px; scroll-margin-top: 35px; }
  .chapter-label { display: flex; align-items: center; gap: 16px; margin-bottom: 19px; }
  .chapter-label > span { font-size: 11px; color: #647b50; }
  .chapter-label h2 { font-size: 27px; letter-spacing: -.03em; }
  .article-chapter > p { font-size: 17px; line-height: 1.95; color: #47594e; }
  .metric-callout { padding: 30px 36px; margin: 10px 0 45px; background: #e9eedf; border-radius: 8px; }
  .metric-kind { display: block; font-size: 10px; letter-spacing: .08em; text-transform: uppercase; font-weight: 600; margin-bottom: 13px; }
  .metric-callout strong { display: block; font-family: Georgia, serif; font-size: 44px; font-weight: 400; line-height: 1.25; }
  .metric-callout .metric-comparison { display: flex; flex-wrap: wrap; align-items: baseline; gap: .2em; font-size: clamp(28px, 7vw, 44px); }
  .metric-comparison > span { white-space: nowrap; }
  .metric-label { display: block; font-size: 14px; margin-top: 6px; }
  .metric-callout p { font-size: 13px; line-height: 1.8; color: var(--muted); margin-top: 18px; max-width: 570px; }
  .delivery-panel { margin: 0 0 45px; padding: 30px 36px; border: 1px solid #cdd7c3; border-radius: 8px; background: #e9eedf; }
  .delivery-panel h3 { font-size: 23px; font-weight: 500; letter-spacing: -.025em; margin: 0 0 20px; }
  .delivery-panel ul, .implementation-details { margin: 0; padding: 0; list-style: none; }
  .delivery-panel li { position: relative; padding-left: 21px; font-size: 16px; line-height: 1.75; }
  .delivery-panel li + li { margin-top: 14px; padding-top: 14px; border-top: 1px solid #cdd7c3; }
  .delivery-panel li::before { content: ''; position: absolute; left: 0; top: .7em; width: 5px; height: 5px; border-radius: 50%; background: var(--green); }
  .delivery-panel li + li::before { top: calc(.7em + 14px); }
  .implementation-details { margin-top: 24px; border-left: 2px solid #b8c8a7; padding-left: 20px; }
  .implementation-details li { font-size: 15px; line-height: 1.85; color: #47594e; }
  .implementation-details li + li { margin-top: 14px; }
  .verification-intro { margin-bottom: 24px; }
  .verification-list { padding: 0; margin: 0; list-style: none; counter-reset: verification; }
  .verification-list li { counter-increment: verification; display: grid; grid-template-columns: 30px minmax(0, 1fr); gap: 14px; align-items: baseline; padding-block: 18px; border-top: 1px solid var(--line); font-size: 16px; line-height: 1.8; color: #47594e; }
  .verification-list li::before { content: counter(verification, decimal-leading-zero); font-size: 12px; font-variant-numeric: tabular-nums; color: #647b50; }
  .article-end { display: flex; align-items: center; gap: 12px; padding-block: 23px; border-top: 1px solid var(--line); font-size: 11px; color: var(--muted); }
  .related-section { padding-block: 55px 80px; }
  .not-found { min-height: 65vh; display: flex; flex-direction: column; align-items: flex-start; justify-content: center; gap: 24px; }
  .not-found h1 { font-size: 60px; }
}
@layer responsive {
  @media (min-width: 1600px) { .hero-content { padding-block: 74px 80px; } }
  @media (max-width: 1150px) {
    .header-inner > nav { gap: 20px; }
    .header-cta { display: none; }
    .hero-content { grid-template-columns: minmax(0, 1fr) 240px; gap: 35px; }
    .hero h1 { font-size: clamp(46px, 5.5vw, 65px); }
    .hero-aside p { font-size: 14px; }
    .featured-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 20px; }
    .featured-grid .case-art { height: auto; aspect-ratio: 600/350; }
    .case-grid { gap: 25px 20px; }
    .case-card h3 { font-size: 21px; }
    .index-card .card-body { padding: 18px; }
    .card-bottom { align-items: flex-start; flex-direction: column; }
    .approach { gap: 60px; }
    .about-panel { padding: 45px; }
    .article-layout { grid-template-columns: 210px minmax(0,1fr); gap: 55px; }
    .article-hero { gap: 40px; }
  }
  @media (max-width: 800px) {
    .header-inner { min-height: 82px; display: grid; grid-template-columns: 1fr auto; column-gap: 16px; row-gap: 5px; padding-block: 12px 5px; }
    .header-inner > nav { grid-column: 1 / -1; grid-row: 2; justify-content: center; gap: 28px; }
    .header-actions { justify-self: end; }
    .site-title { font-size: 22px; }
    .header-inner > nav a { font-size: 12px; }
    .hero { padding-top: 30px; }
    .hero-edition { display: none; }
    .hero-content { grid-template-columns: 1fr; gap: 32px; padding-block: 38px 42px; }
    .hero h1 { font-size: clamp(48px, 8.1vw, 68px); }
    .hero-aside { display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 12px 30px; padding: 0; }
    .hero-aside .small-label { display: none; }
    .hero-aside p { margin: 0; max-width: 390px; }
    .hero-link { align-self: end; font-size: 11px; }
    .hero-bottom { gap: 25px; }
    .hero-stat + .hero-stat { padding-left: 24px; }
    .hero-bottom > p { max-width: 200px; text-align: right; font-size: 11px; }
    .mini-star { display: none; }
    .featured-section { padding-block: 50px 60px; }
    .section-heading { gap: 25px; }
    .section-heading h2 { font-size: 30px; }
    .section-note { max-width: 190px; font-size: 11px; }
    .featured-grid { grid-template-columns: 1fr 1fr; gap: 26px 22px; }
    .featured-grid .case-card:first-child { grid-column: 1/-1; }
    .featured-grid .case-card:first-child .case-link { display: grid; grid-template-columns: 1fr 1fr; gap: 25px; align-items: center; }
    .featured-grid .case-card:first-child .card-body { padding: 0; }
    .case-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .all-cases { padding-block: 55px; }
    .catalog-meta > span { display: none; }
    .filter-heading { margin-bottom: 18px; }
    .filter-heading > .small-label { font-size: 10px; }
    .approach { gap: 40px; padding-block: 65px; }
    .approach-intro h2 { font-size: 34px; }
    .approach-steps article { gap: 15px; }
    .about-panel { padding: 36px; flex-direction: column; align-items: flex-start; }
    .about-panel h2 { font-size: 40px; }
    .about-wrap { padding-bottom: 40px; }
    .footer-main { flex-wrap: wrap; gap: 15px 25px; }
    .footer-main > p { order: 3; width: 100%; }
    .article-hero { grid-template-columns: 1fr; gap: 32px; padding-block: 35px 45px; }
    .article-title h1 { max-width: 800px; font-size: 48px; }
    .article-art { max-width: 600px; }
    .article-layout { display: block; padding-top: 30px; }
    .article-sidebar { position: static; display: flex; flex-wrap: wrap; gap: 10px 20px; padding-bottom: 30px; }
    .article-sidebar nav { flex-direction: row; flex-wrap: wrap; column-gap: 20px; width: 100%; }
    .article-sidebar > .eyebrow { margin: 0; }
    .article-facts { display: none; }
    .share-button { margin-top: 5px; }
    .article-content { max-width: none; }
    .related-section .case-grid { grid-template-columns: 1fr 1fr; }
    .related-section .case-card:last-child { grid-column: 1/-1; max-width: calc(50% - 10px); }
  }
  @media (max-width: 540px) {
    :root { --gutter: 22px; }
    html { scroll-padding-top: 25px; }
    .header-inner { min-height: 76px; gap: 15px; }
    .site-title { font-size: 21px; }
    .header-inner > nav { gap: 18px; }
    .header-inner .nav-about { display: none; }
    .header-inner > nav a[aria-current]::before { display: none; }
    .hero-eyebrow { font-size: 9px; letter-spacing: .13em; }
    .hero h1 { font-size: clamp(34px, 10.6vw, 57px); line-height: 1.13; letter-spacing: -.06em; }
    .hero-content { padding-top: 29px; gap: 24px; padding-bottom: 33px; }
    .hero-aside { display: block; }
    .hero-aside p { font-size: 15px; line-height: 1.7; }
    .hero-link { margin-top: 20px; font-size: 12px; }
    .hero-bottom { min-height: 83px; gap: 26px; flex-wrap: wrap; }
    .hero-stat strong { font-size: 32px; }
    .hero-stat + .hero-stat { padding-left: 25px; }
    .hero-bottom > p { display: none; }
    .hero-stat span { max-width: none; font-size: 10px; }
    .section-heading { display: block; margin-bottom: 25px; }
    .section-heading h2 { font-size: 30px; line-height: 1.15; }
    .section-note { margin-top: 16px; max-width: 280px; font-size: 12px; }
    .section-note br { display: none; }
    .featured-grid, .case-grid { display: grid; grid-template-columns: 1fr; gap: 30px; }
    .featured-grid .case-card:first-child .case-link { display: flex; gap: 0; align-items: stretch; }
    .featured-grid .case-card:first-child .card-body { padding-top: 17px; }
    .featured-grid .case-art { aspect-ratio: 600/350; }
    .case-card h3, .index-card h3 { font-size: 25px; }
    .client { font-size: 14px; }
    .case-meta { font-size: 11px; }
    .card-summary { font-size: 16px; line-height: 1.7; }
    .card-bottom { flex-direction: row; align-items: center; }
    .tags > span { font-size: 10px; }
    .index-card .card-body { padding: 22px; }
    .read-link { font-size: 11px; }
    .featured-section { padding-bottom: 50px; }
    .featured-card .read-link { display: flex; }
    .filter-heading { display: block; }
    .search-form { margin-top: 15px; width: 100%; }
    .search-form input { font-size: 16px; }
    .filters { gap: 8px; }
    .filter { padding-inline: 12px; font-size: 11px; }
    .catalog-meta { padding-block: 22px; font-size: 12px; }
    .source-note { font-size: 12px; }
    .approach { display: block; padding-block: 60px; }
    .approach-intro h2 { font-size: 37px; }
    .approach-intro > p:not(.eyebrow) { font-size: 16px; }
    .approach-steps { margin-top: 32px; }
    .approach-steps p { font-size: 16px; }
    .approach-steps h3 { font-size: 22px; }
    .about-panel { padding: 33px 25px; gap: 30px; }
    .about-panel h2 { font-size: 35px; }
    .about-panel p:not(.eyebrow) { font-size: 15px; }
    .about-panel .button { width: 100%; justify-content: space-between; }
    .footer-main .site-title { font-size: 23px; }
    .footer-bottom { flex-direction: column; gap: 6px; font-size: 11px; }
    .article-top { padding-top: 22px; }
    .article-top .eyebrow { font-size: 9px; }
    .back-link { font-size: 12px; }
    .article-title h1 { font-size: 39px; line-height: 1.14; }
    .article-title > .eyebrow { margin-bottom: 18px; }
    .article-summary { font-size: 16px; }
    .article-sidebar nav { column-gap: 15px; }
    .article-sidebar nav a { font-size: 12px; gap: 8px; }
    .article-chapter > p { font-size: 17px; line-height: 1.85; }
    .chapter-label { gap: 12px; }
    .chapter-label h2 { font-size: 26px; }
    .metric-callout, .delivery-panel { padding: 25px; }
    .metric-callout strong { font-size: 38px; }
    .metric-callout p { font-size: 14px; }
    .related-section .case-grid { grid-template-columns: 1fr; }
    .related-section .case-card:last-child { max-width: none; grid-column: auto; }
    .related-section .text-link { margin-top: 15px; }
    .not-found h1 { font-size: 42px; }
  }
  @media (max-width: 360px) {
    .header-inner > nav a[href$="/#approach"] { display: flex; }
    .hero-bottom { gap: 16px; }
    .hero-stat + .hero-stat { padding-left: 16px; }
    .card-bottom { flex-direction: column; align-items: flex-start; }
  }
  @media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; animation: none !important; }
  }
  @media print {
    .site-header, .site-footer, .article-sidebar, .article-top, .related-section, .article-art { display: none; }
    body { background: white; color: black; }
    .article-hero, .article-layout { display: block; padding: 25px 0; }
    .article-content { max-width: none; }
    .article-title h1 { font-size: 36px; }
    .metric-callout, .delivery-panel, .verification-list li { break-inside: avoid; }
  }
}