:root {
  --story-paper: #f4f1eb;
  --story-white: #fffefb;
  --story-ink: #171a1f;
  --story-body-color: #35383c;
  --story-muted: #6f706d;
  --story-red: #a52b31;
  --story-red-soft: #f0ddda;
  --story-green: #244c3f;
  --story-line: #d7d2c8;
  --story-title: clamp(2.4rem, 5vw, 4.6rem);
  --story-dek: clamp(1.18rem, 2vw, 1.5rem);
  --story-body: 1.08rem;
  --story-width: 1180px;
  --reading-width: 720px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; background: var(--story-paper); }
body { margin: 0; color: var(--story-ink); background: var(--story-paper); font-family: "Noto Sans TC", "PingFang TC", "Microsoft JhengHei", ui-sans-serif, system-ui, sans-serif; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; height: auto; }
button, input, textarea, select { font: inherit; }
:focus-visible { outline: 3px solid var(--story-red); outline-offset: 3px; }

.reading-progress { position: fixed; z-index: 100; inset: 0 auto auto 0; width: 100%; height: 3px; background: var(--story-red); transform: scaleX(0); transform-origin: left; }
.demo-disclosure { min-height: 38px; padding: 8px 24px; display: flex; justify-content: center; align-items: center; gap: 12px; color: white; background: var(--story-red); font-size: 12px; letter-spacing: .02em; text-align: center; }
.demo-disclosure strong { padding: 2px 7px; border: 1px solid rgba(255,255,255,.72); font-size: 11px; letter-spacing: .08em; }

.story-header { min-height: 76px; padding: 10px max(24px, calc((100vw - var(--story-width)) / 2)); display: flex; justify-content: space-between; align-items: center; border-bottom: 1px solid var(--story-ink); background: var(--story-white); }
.story-masthead { display: grid; grid-template-columns: auto auto; align-items: baseline; column-gap: 8px; }
.story-masthead span { grid-row: 1 / 3; padding-right: 9px; border-right: 3px solid var(--story-red); font-family: Georgia, serif; font-size: 26px; font-weight: 700; letter-spacing: -.03em; }
.story-masthead strong { font-size: 13px; letter-spacing: .08em; }
.story-masthead small { color: var(--story-muted); font-size: 12px; letter-spacing: .12em; }
.story-header nav { display: flex; align-items: center; gap: 24px; font-size: 13px; font-weight: 650; }
.story-header nav a { min-height: 44px; display: inline-flex; align-items: center; border-bottom: 2px solid transparent; }
.story-header nav a:hover { border-color: var(--story-red); }
.story-nav-cta { padding-inline: 15px; color: white; background: var(--story-ink); white-space: nowrap; }

.breadcrumbs { width: min(calc(100% - 48px), 980px); margin: 0 auto; padding-top: 24px; display: flex; flex-wrap: wrap; gap: 7px; color: var(--story-muted); font-size: 12px; }
.breadcrumbs a:hover { color: var(--story-red); }
.breadcrumbs b { color: var(--story-ink); }
.article-header { width: min(calc(100% - 48px), 980px); margin: 0 auto; padding: clamp(36px, 5vw, 62px) 0 40px; }
.article-category { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.article-category span { padding: 5px 8px; border: 1px solid var(--story-line); color: var(--story-red); font-size: 12px; font-weight: 750; letter-spacing: .07em; }
.article-header h1 { max-width: 980px; margin: 0; font-family: "Noto Serif TC", "Songti TC", "PMingLiU", serif; font-size: var(--story-title); line-height: 1.18; letter-spacing: -.04em; font-weight: 800; text-wrap: balance; }
.article-dek { max-width: 820px; margin: 28px 0 0; color: var(--story-body-color); font-family: "Noto Serif TC", "Songti TC", serif; font-size: var(--story-dek); line-height: 1.65; font-weight: 650; }
.article-meta { margin-top: 32px; padding-top: 14px; display: flex; flex-wrap: wrap; gap: 10px 24px; border-top: 1px solid var(--story-line); color: var(--story-muted); font-size: 12px; }
.article-meta p { margin: 0; }
.article-meta b { margin-right: 6px; color: var(--story-ink); }

.story-hero { width: min(calc(100% - 32px), 1280px); margin: 0 auto; }
.story-hero img { width: 100%; height: auto; aspect-ratio: 16 / 9; object-fit: cover; background: #ddd8cf; }
.story-hero figcaption { padding: 10px 0 0; display: flex; justify-content: space-between; gap: 18px; color: var(--story-muted); font-size: 12px; line-height: 1.55; }
.story-hero figcaption span { color: var(--story-red); font-weight: 750; }

.answer-summary { width: min(calc(100% - 48px), 960px); margin: 66px auto 0; padding: 32px 36px; display: grid; grid-template-columns: 190px 1fr; gap: 6px 42px; border-top: 4px solid var(--story-red); background: var(--story-white); box-shadow: 0 12px 30px rgba(24, 25, 23, .05); }
.answer-summary > p:first-child { grid-row: 1 / 4; margin: 0; color: var(--story-red); font-size: 11px; font-weight: 800; letter-spacing: .12em; }
.answer-summary h2 { margin: 0; font-family: "Noto Serif TC", "Songti TC", serif; font-size: clamp(1.65rem, 3vw, 2.3rem); line-height: 1.35; }
.answer-summary > p:nth-of-type(2) { margin: 14px 0 0; color: var(--story-body-color); font-family: "Noto Serif TC", "Songti TC", serif; font-size: 1.05rem; line-height: 1.85; }
.answer-summary dl { margin: 24px 0 0; display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); border-top: 1px solid var(--story-line); border-left: 1px solid var(--story-line); }
.answer-summary dl div { padding: 12px 14px; border-right: 1px solid var(--story-line); border-bottom: 1px solid var(--story-line); }
.answer-summary dt { color: var(--story-muted); font-size: 11px; }
.answer-summary dd { margin: 5px 0 0; font-size: 13px; font-weight: 700; line-height: 1.5; }

.story-layout { width: min(calc(100% - 48px), 970px); margin: 0 auto; padding-top: 72px; display: grid; grid-template-columns: 180px minmax(0, var(--reading-width)); gap: 70px; }
.story-rail { position: sticky; top: 20px; align-self: start; border-top: 3px solid var(--story-red); }
.rail-label { margin: 10px 0 16px; color: var(--story-red); font-size: 11px; font-weight: 800; letter-spacing: .09em; }
.story-rail dl { margin: 0; }
.story-rail dl div { padding: 13px 0; border-top: 1px solid var(--story-line); }
.story-rail dt { font-family: Georgia, "Noto Serif TC", serif; font-size: 22px; font-weight: 700; }
.story-rail dd { margin: 4px 0 0; color: var(--story-muted); font-size: 12px; line-height: 1.55; }
.approval-note { margin-top: 20px; padding: 12px; color: #68423d; background: var(--story-red-soft); font-size: 12px; line-height: 1.65; }

.article-body { min-width: 0; color: var(--story-body-color); font-family: "Noto Serif TC", "Songti TC", "PMingLiU", serif; }
.article-body > p, .article-body section > p { margin: 0 0 24px; font-size: var(--story-body); line-height: 1.95; letter-spacing: .005em; }
.article-body .lead { color: var(--story-ink); font-size: 1.24rem; line-height: 1.82; font-weight: 650; }
.article-body section { margin-top: 68px; }
.section-number { margin-bottom: 9px !important; color: var(--story-red); font-family: ui-sans-serif, system-ui, sans-serif !important; font-size: 11px !important; font-weight: 800; letter-spacing: .11em !important; }
.article-body h2 { margin: 0 0 24px; color: var(--story-ink); font-size: clamp(1.75rem, 3vw, 2.25rem); line-height: 1.4; letter-spacing: -.025em; }
.article-body blockquote { margin: 46px 0; padding: 26px 0; border-block: 1px solid var(--story-red); color: var(--story-ink); font-size: clamp(1.45rem, 3vw, 2rem); line-height: 1.55; font-weight: 700; }
.article-body blockquote cite { margin-top: 14px; display: block; color: var(--story-muted); font-family: ui-sans-serif, system-ui, sans-serif; font-size: 11px; font-style: normal; font-weight: 500; }

.concept-panel { margin: 42px 0 8px; padding: 24px; border: 1px solid #b9c4cf; background: #edf1f4; font-family: ui-sans-serif, system-ui, sans-serif; }
.concept-panel__top { display: flex; justify-content: space-between; gap: 18px; color: #37526c; font-size: 10px; font-weight: 800; letter-spacing: .1em; }
.concept-panel__top small { letter-spacing: 0; }
.concept-panel h3 { margin: 24px 0 20px; color: var(--story-ink); font-family: "Noto Serif TC", serif; font-size: 1.45rem; line-height: 1.5; }
.concept-prompt, .concept-response { padding: 16px 18px; border-radius: 4px; }
.concept-prompt { width: 88%; margin-left: auto; background: #d8e5ee; }
.concept-response { width: 92%; margin-top: 12px; background: white; }
.concept-prompt b, .concept-response b { color: #37526c; font-size: 11px; }
.concept-prompt p { margin: 6px 0 0; font-size: 14px; line-height: 1.6; }
.concept-response ul { margin: 10px 0 0; padding-left: 18px; }
.concept-response li { margin: 7px 0; color: var(--story-body-color); font-size: 13px; line-height: 1.5; }
.concept-note { margin: 16px 0 0 !important; color: #5c6670; font-family: ui-sans-serif, system-ui, sans-serif; font-size: 11px !important; line-height: 1.6 !important; }

.value-grid { width: min(calc(100% - 32px), 1180px); margin: 90px auto 0; padding: 52px; color: white; background: var(--story-green); }
.value-heading { display: grid; grid-template-columns: 180px 1fr; gap: 36px; align-items: start; }
.value-heading p { margin: 4px 0 0; color: #b8d1c7; font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.value-heading h2 { max-width: 760px; margin: 0; font-family: "Noto Serif TC", serif; font-size: clamp(2rem, 4vw, 3.2rem); line-height: 1.3; }
.value-cards { margin-top: 42px; display: grid; grid-template-columns: repeat(3, 1fr); border: 1px solid rgba(255,255,255,.3); }
.value-cards article { padding: 24px; border-right: 1px solid rgba(255,255,255,.3); }
.value-cards article:last-child { border-right: 0; }
.value-cards span { color: #b8d1c7; font-family: Georgia, serif; font-size: 13px; }
.value-cards small { margin-top: 26px; display: block; color: #b8d1c7; font-size: 11px; }
.value-cards h3 { margin: 7px 0 12px; font-family: "Noto Serif TC", serif; font-size: 1.45rem; }
.value-cards p { margin: 0; color: #edf4f1; font-size: 13px; line-height: 1.75; }

.evidence-box { width: min(calc(100% - 48px), 960px); margin: 82px auto 0; padding: 34px; display: grid; grid-template-columns: 1fr 1.5fr; gap: 42px; border: 1px solid var(--story-red); background: var(--story-white); }
.evidence-box > div > p { margin: 0; color: var(--story-red); font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.evidence-box h2 { margin: 16px 0 0; font-family: "Noto Serif TC", serif; font-size: clamp(1.7rem, 3vw, 2.35rem); line-height: 1.4; }
.evidence-box ul { margin: 0; padding: 0; list-style: none; }
.evidence-box li { padding: 12px 0; border-top: 1px solid var(--story-line); color: var(--story-body-color); font-size: 13px; line-height: 1.6; }
.evidence-box li:first-child { border-top: 0; }
.evidence-box li span { margin-right: 8px; color: var(--story-red); font-weight: 800; }

.article-conclusion { width: min(calc(100% - 48px), var(--reading-width)); margin: 82px auto 0; color: var(--story-body-color); font-family: "Noto Serif TC", serif; }
.article-conclusion > p { margin: 0 0 24px; font-size: var(--story-body); line-height: 1.9; }
.article-conclusion blockquote { margin: 36px 0; color: var(--story-ink); font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.35; font-weight: 800; }

.faq-section { width: min(calc(100% - 48px), 960px); margin: 86px auto 0; }
.faq-section > p { margin: 0; color: var(--story-red); font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.faq-section > h2 { margin: 15px 0 28px; font-family: "Noto Serif TC", serif; font-size: clamp(2rem, 4vw, 3rem); }
.faq-list { border-top: 1px solid var(--story-ink); }
.faq-list article { padding: 24px 0; display: grid; grid-template-columns: 1fr 1.6fr; gap: 38px; border-bottom: 1px solid var(--story-line); }
.faq-list h3 { margin: 0; font-size: 1rem; line-height: 1.6; }
.faq-list p { margin: 0; color: var(--story-body-color); font-family: "Noto Serif TC", serif; font-size: 15px; line-height: 1.8; }

.reuse-section { margin-top: 86px; padding: 68px max(24px, calc((100vw - 1080px) / 2)); background: var(--story-white); }
.reuse-intro { display: grid; grid-template-columns: 180px 1fr; gap: 6px 36px; }
.reuse-intro p { grid-row: 1 / 3; margin: 5px 0 0; color: var(--story-red); font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.reuse-intro h2 { margin: 0; font-family: "Noto Serif TC", serif; font-size: clamp(2rem, 4vw, 3.2rem); }
.reuse-intro span { margin-top: 8px; color: var(--story-muted); font-size: 14px; }
.reuse-list { margin-top: 40px; display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1px solid var(--story-line); border-left: 1px solid var(--story-line); }
.reuse-list article { padding: 20px; border-right: 1px solid var(--story-line); border-bottom: 1px solid var(--story-line); }
.reuse-list b { color: var(--story-red); font-size: 11px; }
.reuse-list h3 { margin: 26px 0 8px; font-family: "Noto Serif TC", serif; font-size: 1.25rem; }
.reuse-list p { margin: 0; color: var(--story-muted); font-size: 13px; line-height: 1.65; }

.related-stories { width: min(calc(100% - 48px), 1080px); margin: 0 auto; padding: 74px 0; }
.related-stories > div:first-child { display: grid; grid-template-columns: 180px 1fr; gap: 36px; }
.related-stories > div:first-child p { margin: 5px 0 0; color: var(--story-red); font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.related-stories h2 { margin: 0; font-family: "Noto Serif TC", serif; font-size: clamp(2rem, 4vw, 3.1rem); }
.related-stories > div:nth-child(2) { margin-top: 38px; display: grid; grid-template-columns: repeat(3, 1fr); border-block: 1px solid var(--story-ink); }
.related-stories > div:nth-child(2) a { min-height: 190px; padding: 22px; display: flex; flex-direction: column; border-right: 1px solid var(--story-line); }
.related-stories > div:nth-child(2) a:last-child { border-right: 0; }
.related-stories span { color: var(--story-red); font-size: 12px; font-weight: 700; }
.related-stories b { margin-top: 28px; font-family: "Noto Serif TC", serif; font-size: 1.22rem; line-height: 1.5; }
.related-stories small { margin-top: auto; color: var(--story-muted); }
.related-all { margin: 24px 0 0 auto; width: fit-content; padding-bottom: 4px; display: block; border-bottom: 1px solid var(--story-ink); font-size: 13px; font-weight: 700; }

.story-cta { padding: 76px max(24px, calc((100vw - 920px) / 2)); color: white; background: var(--story-ink); text-align: center; }
.story-cta > p { color: #efb0a1; font-size: 11px; font-weight: 800; letter-spacing: .1em; }
.story-cta h2 { max-width: 860px; margin: 22px auto 0; font-family: "Noto Serif TC", serif; font-size: clamp(2.2rem, 4.5vw, 3.5rem); line-height: 1.3; }
.story-cta > a { width: min(100%, 440px); min-height: 54px; margin: 34px auto 0; padding: 0 18px; display: flex; justify-content: space-between; align-items: center; color: var(--story-ink); background: white; font-size: 14px; font-weight: 750; }
.story-cta > a:hover { background: #f0d9da; }
.story-cta > small { display: block; margin-top: 18px; color: #a9a9a9; font-size: 11px; }
.story-footer { min-height: 66px; padding: 16px max(24px, calc((100vw - var(--story-width)) / 2)); display: flex; justify-content: space-between; align-items: center; color: #999; background: var(--story-ink); border-top: 1px solid #444; font-size: 11px; letter-spacing: .06em; }

@media (max-width: 860px) {
  .story-header { padding-inline: 18px; }
  .story-header nav a:not(.story-nav-cta) { display: none; }
  .answer-summary { grid-template-columns: 1fr; }
  .answer-summary > p:first-child { grid-row: auto; }
  .story-layout { grid-template-columns: 1fr; gap: 34px; padding-top: 54px; }
  .story-rail { position: static; }
  .story-rail dl { display: grid; grid-template-columns: repeat(3, 1fr); }
  .story-rail dl div { padding-right: 10px; }
  .value-heading, .evidence-box, .reuse-intro, .related-stories > div:first-child { grid-template-columns: 1fr; }
  .value-cards { grid-template-columns: 1fr; }
  .value-cards article { border-right: 0; border-bottom: 1px solid rgba(255,255,255,.3); }
  .value-cards article:last-child { border-bottom: 0; }
  .reuse-list { grid-template-columns: repeat(2, 1fr); }
  .related-stories > div:nth-child(2) { grid-template-columns: 1fr; }
  .related-stories > div:nth-child(2) a { border-right: 0; border-bottom: 1px solid var(--story-line); }
  .related-stories > div:nth-child(2) a:last-child { border-bottom: 0; }
}

@media (max-width: 560px) {
  .demo-disclosure { align-items: flex-start; flex-direction: column; gap: 4px; padding: 9px 16px; text-align: left; }
  .story-header { min-height: 68px; }
  .story-masthead span { font-size: 23px; }
  .story-masthead strong { font-size: 11px; letter-spacing: .06em; white-space: nowrap; }
  .story-masthead small { display: none; }
  .story-nav-cta { padding-inline: 12px; font-size: 12px; }
  .breadcrumbs, .article-header { width: min(calc(100% - 32px), 980px); }
  .article-header { padding: 36px 0 32px; }
  .article-header h1 { font-size: 2.35rem; line-height: 1.24; }
  .article-dek { font-size: 1.18rem; }
  .article-meta { margin-top: 24px; }
  .story-hero { width: 100%; }
  .story-hero figcaption { padding-inline: 16px; flex-direction: column; gap: 4px; }
  .answer-summary { width: min(calc(100% - 32px), 960px); margin-top: 48px; padding: 25px 20px; }
  .answer-summary dl { grid-template-columns: 1fr; }
  .story-layout { width: min(calc(100% - 32px), 970px); }
  .story-rail dl { grid-template-columns: 1fr; }
  .article-body section { margin-top: 52px; }
  .article-body h2 { font-size: 1.75rem; }
  .concept-panel { padding: 17px; }
  .concept-prompt, .concept-response { width: 100%; }
  .value-grid { width: 100%; margin-top: 64px; padding: 50px 16px; }
  .evidence-box { width: min(calc(100% - 32px), 960px); padding: 26px 20px; }
  .faq-section { width: min(calc(100% - 32px), 960px); }
  .faq-list article { grid-template-columns: 1fr; gap: 12px; }
  .reuse-section, .story-cta { padding: 58px 16px; }
  .reuse-list { grid-template-columns: 1fr; }
  .related-stories { width: min(calc(100% - 32px), 1080px); }
  .story-cta h2 { font-size: 2.2rem; }
  .story-footer { align-items: flex-start; flex-direction: column; gap: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}