:root {
  color-scheme: light;
  --paper: #faf7f2;
  --white: #fff;
  --ink: #0b1b2e;
  --ink-soft: #263d55;
  --blue: #235b88;
  --blue-light: #e9f1f8;
  --teal: #2e7d6b;
  --mint: #e8f3ef;
  --cream-deep: #f0e8dc;
  --red: #b63e3e;
  --line: rgba(11, 27, 46, .18);
  --line-strong: rgba(11, 27, 46, .35);
  --muted: #40546a;
  --focus: #146caa;
  --content: 1160px;
}

*, *::before, *::after { box-sizing: border-box; }

html {
  min-width: 320px;
  scroll-behavior: smooth;
  scroll-padding-top: 112px;
}

body {
  margin: 0;
  min-width: 320px;
  overflow-x: hidden;
  background: var(--paper);
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Apple SD Gothic Neo", "Malgun Gothic", "Noto Sans CJK KR", sans-serif;
  font-size: 18px;
  line-height: 1.7;
  word-break: keep-all;
  overflow-wrap: break-word;
}

a { color: inherit; }
a, summary { touch-action: manipulation; }
a:focus-visible, summary:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 4px;
}

img { max-width: 100%; }
h1, h2, h3, p, dl, dd { margin-top: 0; }
h1, h2, h3 { line-height: 1.24; text-wrap: balance; }
p { text-wrap: pretty; }
.wrap { width: min(100% - 40px, var(--content)); margin-inline: auto; }
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: -100px;
  left: 20px;
  min-height: 48px;
  padding: 10px 16px;
  background: var(--ink);
  color: var(--white);
  font-weight: 700;
  text-decoration: none;
}
.skip-link:focus { top: 12px; }

.site-header {
  position: relative;
  z-index: 10;
  border-bottom: 1px solid var(--line);
  background: var(--paper);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 96px;
  gap: 24px;
}
.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  min-height: 48px;
  gap: 12px;
  color: var(--ink);
  font-size: 24px;
  font-weight: 780;
  letter-spacing: -.035em;
  text-decoration: none;
}
.brand-mark {
  display: grid;
  width: 48px;
  height: 52px;
  place-items: center;
  overflow: hidden;
  background: var(--white);
}
.brand-mark img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
}
.brand small {
  margin-left: 4px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  letter-spacing: 0;
}
.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 4px 12px;
}
.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 8px 10px;
  font-size: 16px;
  font-weight: 680;
  text-decoration: none;
  text-underline-offset: 6px;
}
.site-nav a:hover, .site-nav a:active { color: var(--blue); text-decoration: underline; }

.eyebrow, .card-label, .block-label, .preview-label {
  margin: 0 0 16px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: .085em;
}

.hero { border-bottom: 1px solid var(--line); }
.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(330px, .75fr);
  gap: clamp(40px, 7vw, 104px);
  align-items: end;
  padding-block: clamp(64px, 9vw, 124px);
}
.hero-copy { min-width: 0; }
.hero h1 {
  max-width: 15ch;
  margin-bottom: 24px;
  font-size: clamp(40px, 5.4vw, 72px);
  font-weight: 760;
  letter-spacing: -.065em;
}
.hero h1 span { color: var(--blue); }
.hero-description {
  max-width: 31em;
  margin-bottom: 12px;
  font-size: clamp(20px, 2.1vw, 24px);
  font-weight: 680;
  line-height: 1.58;
}
.hero-support { max-width: 38em; margin-bottom: 32px; color: var(--muted); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; }
.action {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  gap: 24px;
  padding: 12px 22px;
  border: 1px solid var(--ink);
  font-size: 17px;
  font-weight: 750;
  text-decoration: none;
  transition: background-color .15s ease, border-color .15s ease, color .15s ease;
}
.action-primary { background: var(--ink); color: var(--white); }
.action-primary:hover, .action-primary:active { border-color: var(--blue); background: var(--blue); }
.action-secondary { background: transparent; }
.action-secondary:hover, .action-secondary:active { background: var(--mint); }
.launch-note {
  max-width: 48em;
  margin: 28px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--teal);
  color: var(--muted);
  font-size: 16px;
}
.launch-note strong { color: var(--ink); }

.decision-preview {
  min-width: 0;
  border-top: 4px solid var(--red);
  background: var(--white);
  padding: clamp(24px, 3vw, 36px);
}
.decision-preview h2 { margin-bottom: 28px; font-size: clamp(27px, 2.7vw, 36px); letter-spacing: -.04em; }
.preview-list { margin-bottom: 18px; border-top: 1px solid var(--line); }
.preview-list > div {
  display: grid;
  grid-template-columns: minmax(100px, .7fr) minmax(0, 1.3fr);
  gap: 16px;
  padding-block: 14px;
  border-bottom: 1px solid var(--line);
}
.preview-list dt { color: var(--muted); font-size: 15px; }
.preview-list dd { margin: 0; font-size: 16px; font-weight: 720; }
.preview-help { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.55; }

.section { padding-block: clamp(72px, 8vw, 112px); }
.section-heading { max-width: 820px; margin-bottom: 40px; }
.section-heading h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -.05em;
}
.section-heading > p:last-child { margin-bottom: 0; color: var(--muted); }
.split-heading, .economy-heading, .install-heading {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(300px, .95fr);
  max-width: none;
  gap: 40px 72px;
  align-items: end;
}
.split-heading h2, .economy-heading h2, .install-heading h2 { margin-bottom: 0; }

.concern-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-block: 1px solid var(--line-strong);
}
.concern-card { min-width: 0; padding: 32px clamp(18px, 3vw, 36px) 36px 0; }
.concern-card + .concern-card { padding-left: clamp(18px, 3vw, 36px); border-left: 1px solid var(--line); }
.concern-card:last-child { padding-right: 0; }
.card-number { margin-bottom: 40px; color: var(--red); font-size: 15px; font-weight: 800; }
.concern-card h3 { margin-bottom: 14px; font-size: 25px; letter-spacing: -.035em; }
.concern-card p:last-child { margin-bottom: 0; color: var(--muted); }

.service-story {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(0, 1.15fr);
  gap: 40px 80px;
  margin-top: 72px;
  padding: clamp(32px, 5vw, 56px);
  background: var(--blue-light);
}
.service-story h3 { margin-bottom: 0; font-size: clamp(28px, 3.2vw, 40px); letter-spacing: -.045em; }
.plain-list { margin: 0; padding: 0; list-style: none; }
.plain-list li {
  display: grid;
  grid-template-columns: 145px minmax(0, 1fr);
  gap: 16px;
  padding-block: 18px;
  border-top: 1px solid var(--line);
}
.plain-list li:last-child { border-bottom: 1px solid var(--line); }
.plain-list strong { font-size: 16px; }
.plain-list span { color: var(--muted); }

.process-section { border-block: 1px solid var(--line); background: var(--white); }
.process-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: none;
}
.process-list > li { min-width: 0; padding: 0 clamp(18px, 3vw, 36px) 8px 0; }
.process-list > li + li { padding-left: clamp(18px, 3vw, 36px); border-left: 1px solid var(--line); }
.process-list > li:last-child { padding-right: 0; }
.step-number {
  display: grid;
  width: 48px;
  height: 48px;
  margin-bottom: 24px;
  place-items: center;
  border: 1px solid var(--ink);
  border-radius: 50%;
  font-weight: 800;
}
.process-list h3 { margin-bottom: 12px; font-size: 24px; letter-spacing: -.03em; }
.process-list p { margin: 0; color: var(--muted); }
.information-note {
  display: grid;
  grid-template-columns: minmax(220px, .7fr) minmax(0, 1.3fr);
  gap: 24px 48px;
  margin-top: 56px;
  padding-top: 28px;
  border-top: 3px solid var(--ink);
}
.information-note h3 { margin-bottom: 0; font-size: 23px; }
.information-note p { margin-bottom: 0; color: var(--muted); }

.article-section { border-top: 1px solid var(--line); background: var(--cream-deep); }
.article-layout { display: grid; gap: 40px; }
.article-intro { max-width: 820px; }
.article-intro h2 {
  margin-bottom: 18px;
  font-size: clamp(34px, 4vw, 52px);
  letter-spacing: -.05em;
}
.article-intro > p:last-child { max-width: 62ch; margin-bottom: 0; color: var(--muted); }
.article-context-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  border-block: 1px solid var(--line-strong);
}
.article-summary, .assetfit-interpretation { min-width: 0; padding: 36px clamp(24px, 4vw, 48px) 40px 0; }
.assetfit-interpretation { padding-right: 0; padding-left: clamp(24px, 4vw, 48px); border-left: 1px solid var(--line); }
.context-label { margin-bottom: 18px; color: var(--teal); font-size: 14px; font-weight: 800; letter-spacing: .07em; }
.article-context-grid h3 { margin-bottom: 18px; font-size: clamp(24px, 2.6vw, 32px); letter-spacing: -.035em; }
.article-summary h3 a { text-decoration-thickness: 1px; text-underline-offset: 7px; }
.article-summary h3 a:hover, .article-summary h3 a:active { color: var(--blue); }
.article-context-grid p { color: var(--muted); }
.article-boundary { margin-bottom: 0; font-size: 15px; font-weight: 700; }
.capability-guard { margin: 24px 0 0; padding-top: 20px; border-top: 1px solid var(--line); font-size: 16px; }
.capability-guard strong { display: block; margin-bottom: 4px; color: var(--ink); }

.economy-section { background: var(--ink); color: var(--paper); }
.economy-section .eyebrow, .economy-section .block-label { color: #8fc6b8; }
.economy-heading > p:last-child { color: #cfdae5; }
.economy-block { padding-top: 32px; border-top: 1px solid rgba(255, 255, 255, .3); }
.economy-block + .economy-block { margin-top: 64px; }
.economy-block-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 24px;
}
.economy-block-heading h3 { margin-bottom: 0; font-size: clamp(27px, 3vw, 36px); letter-spacing: -.04em; }
.economy-block-heading .block-label { margin-bottom: 8px; }
.economy-updated, .updated-at, .economy-block-heading time { color: #cfdae5; font-size: 14px; }
.indicator-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background: rgba(255, 255, 255, .28);
}
.indicator-card, .indicator-grid > article, .indicator-grid > div {
  min-width: 0;
  padding: 24px;
  background: var(--ink);
}
.indicator-card h4, .indicator-card h3, .indicator-grid h4, .indicator-grid h3 {
  margin: 0 0 10px;
  font-size: 17px;
}
.indicator-value, .indicator-grid .value {
  margin-bottom: 8px;
  color: var(--white);
  font-size: clamp(27px, 3vw, 36px);
  font-weight: 760;
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.indicator-grid p:last-child { margin-bottom: 0; color: #cfdae5; font-size: 14px; }
.indicator-grid a { text-underline-offset: 4px; }
.news-list { border-top: 1px solid rgba(255, 255, 255, .28); }
.news-item, .news-list > article, .news-list > a {
  display: grid;
  grid-template-columns: minmax(110px, .3fr) minmax(0, 1.7fr) auto;
  gap: 16px 28px;
  align-items: start;
  min-height: 80px;
  padding-block: 22px;
  border-bottom: 1px solid rgba(255, 255, 255, .28);
  color: inherit;
  text-decoration: none;
}
.news-item:hover h4, .news-list > a:hover { color: #b5dce8; }
.news-source, .news-list time { color: #aebfd0; font-size: 14px; }
.news-item h4, .news-item h3, .news-list h4, .news-list h3 { margin: 0; font-size: 19px; }
.news-item p, .news-list p { margin: 6px 0 0; color: #cfdae5; font-size: 16px; }

.install-section { border-bottom: 1px solid var(--line); }
.address-box { padding: 20px 24px; border: 1px solid var(--line-strong); background: var(--white); }
.address-box span { display: block; margin-bottom: 4px; color: var(--muted); font-size: 14px; }
.address-box strong { display: block; overflow-wrap: anywhere; font-size: 20px; }
.address-box p { margin: 8px 0 0; color: var(--red); font-size: 14px; font-weight: 700; }
.install-warning {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  gap: 20px 32px;
  margin-bottom: 32px;
  padding: 22px 24px;
  border-left: 4px solid var(--teal);
  background: var(--mint);
}
.install-warning p { margin: 0; }
.platform-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.platform-card {
  display: flex;
  min-width: 0;
  min-height: 100%;
  flex-direction: column;
  padding: clamp(24px, 3vw, 34px);
  border: 1px solid var(--line-strong);
  background: var(--white);
}
.platform-card h3 { margin-bottom: 14px; font-size: 26px; letter-spacing: -.03em; }
.platform-card > p:not(.card-label) { margin-bottom: 24px; color: var(--muted); }
.platform-status { margin: auto 0 24px; border-top: 1px solid var(--line); }
.platform-status > div {
  display: grid;
  grid-template-columns: minmax(96px, .85fr) minmax(0, 1.15fr);
  gap: 12px;
  padding-block: 10px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}
.platform-status dt { color: var(--muted); }
.platform-status dd { margin: 0; font-weight: 720; }
.platform-link {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  gap: 16px;
  color: var(--blue);
  font-weight: 760;
  text-underline-offset: 5px;
}
.platform-link:hover { color: var(--ink); }
.guide-details { margin-top: 48px; border-top: 2px solid var(--ink); }
.guide-details details { border-bottom: 1px solid var(--line-strong); }
.guide-details summary {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  min-height: 76px;
  gap: 16px;
  padding: 16px 52px 16px 0;
  cursor: pointer;
  font-size: 20px;
  font-weight: 750;
  list-style: none;
}
.guide-details summary::-webkit-details-marker { display: none; }
.guide-details summary small { color: var(--muted); font-size: 14px; font-weight: 600; }
.guide-details summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  color: var(--blue);
  font-size: 28px;
  font-weight: 500;
  transform: translateY(-50%);
}
.guide-details details[open] summary::after { content: "−"; }
.guide-method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  margin-bottom: 28px;
  background: var(--line);
}
.guide-method-grid.single-method { grid-template-columns: 1fr; }
.guide-method-grid section { min-width: 0; padding: 28px; background: var(--white); }
.guide-method-grid h3 { margin-bottom: 18px; font-size: 23px; letter-spacing: -.025em; }
.guide-method-grid ol { margin: 0; padding-left: 1.55em; }
.guide-method-grid li { margin-bottom: 12px; padding-left: .35em; }
.guide-method-grid li:last-child { margin-bottom: 0; }
.guide-method-grid li::marker { color: var(--teal); font-weight: 800; }
.download-toolbar {
  display: grid;
  grid-template-columns: minmax(260px, .75fr) minmax(0, 1.25fr);
  gap: 24px 48px;
  align-items: center;
  margin-top: 48px;
  padding: 28px;
  border-left: 4px solid var(--blue);
  background: var(--blue-light);
}
.download-toolbar h3 { margin-bottom: 8px; font-size: 24px; letter-spacing: -.025em; }
.download-toolbar p:last-child { margin-bottom: 0; color: var(--muted); }
.download-row { display: flex; flex-wrap: wrap; justify-content: flex-end; gap: 12px 28px; }
.download-link {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  min-height: 48px;
  gap: 6px 16px;
  padding-block: 8px;
  color: var(--blue);
  font-weight: 760;
  text-underline-offset: 5px;
}
.download-link:hover { color: var(--ink); }
.download-link span { color: var(--muted); font-size: 14px; font-weight: 500; }
.install-footnote { max-width: 78ch; margin: 20px 0 0; color: var(--muted); font-size: 15px; }

.faq-section { background: var(--white); }
.faq-layout { display: grid; grid-template-columns: minmax(240px, .65fr) minmax(0, 1.35fr); gap: 40px 80px; }
.faq-layout .section-heading { margin-bottom: 0; }
.faq-list { border-top: 2px solid var(--ink); }
.faq-list details { border-bottom: 1px solid var(--line); }
.faq-list summary {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 72px;
  padding: 16px 52px 16px 0;
  cursor: pointer;
  font-size: 19px;
  font-weight: 730;
  list-style: none;
}
.faq-list summary::-webkit-details-marker { display: none; }
.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 8px;
  top: 50%;
  color: var(--blue);
  font-size: 28px;
  font-weight: 500;
  transform: translateY(-50%);
}
.faq-list details[open] summary::after { content: "−"; }
.faq-list details p { max-width: 62ch; margin: -4px 52px 24px 0; color: var(--muted); }

.closing-section { background: var(--cream-deep); padding-block: clamp(56px, 7vw, 88px); }
.closing-inner { display: flex; align-items: end; justify-content: space-between; gap: 32px; }
.closing-inner h2 { margin-bottom: 0; font-size: clamp(34px, 4vw, 52px); letter-spacing: -.05em; }
.action-light { flex: 0 0 auto; background: var(--white); }
.action-light:hover, .action-light:active { background: var(--mint); }

.site-footer { padding-block: 48px; background: var(--ink); color: var(--paper); }
.footer-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(280px, .8fr);
  gap: 32px 64px;
  padding-bottom: 32px;
  border-bottom: 1px solid rgba(255, 255, 255, .28);
}
.footer-brand { margin-bottom: 12px; font-size: 24px; font-weight: 780; }
.footer-brand span { margin-left: 5px; font-size: 16px; font-weight: 520; }
.footer-description { max-width: 42ch; margin-bottom: 0; color: #cfdae5; font-size: 15px; }
.footer-operator p { margin: 0 0 8px; color: #cfdae5; font-size: 15px; }
.footer-operator a { display: inline-flex; align-items: center; min-height: 44px; color: var(--paper); text-underline-offset: 5px; }
.footer-notice { padding-top: 28px; }
.footer-notice p { max-width: 88ch; color: #cfdae5; font-size: 14px; }
.footer-notice .footer-address { margin-bottom: 0; color: var(--paper); }

@media (max-width: 940px) {
  html { scroll-padding-top: 136px; }
  .header-inner { align-items: flex-start; flex-direction: column; padding-block: 16px; gap: 8px; }
  .site-nav { justify-content: flex-start; width: 100%; }
  .hero-inner { grid-template-columns: 1fr; align-items: start; }
  .decision-preview { max-width: 680px; }
  .split-heading, .economy-heading, .install-heading { grid-template-columns: 1fr; align-items: start; gap: 20px; }
  .concern-grid, .process-list { grid-template-columns: 1fr; }
  .concern-card, .process-list > li { padding: 28px 0; }
  .concern-card + .concern-card, .process-list > li + li { padding-left: 0; border-top: 1px solid var(--line); border-left: 0; }
  .card-number { margin-bottom: 16px; }
  .service-story { grid-template-columns: 1fr; }
  .article-context-grid { grid-template-columns: 1fr; }
  .article-summary, .assetfit-interpretation { padding: 28px 0; }
  .assetfit-interpretation { border-top: 1px solid var(--line); border-left: 0; }
  .platform-grid { grid-template-columns: 1fr; }
  .download-toolbar { grid-template-columns: 1fr; }
  .download-row { justify-content: flex-start; }
  .faq-layout { grid-template-columns: 1fr; gap: 24px; }
  .indicator-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 700px) {
  .wrap { width: min(100% - 32px, var(--content)); }
  .brand { font-size: 21px; }
  .brand-mark { width: 42px; height: 45px; }
  .brand small { display: none; }
  .site-nav { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 0; }
  .site-nav a { justify-content: center; padding-inline: 4px; font-size: 14px; text-align: center; }
  .hero-inner { padding-block: 56px 72px; gap: 40px; }
  .hero h1 { font-size: clamp(36px, 10.5vw, 52px); }
  .hero-actions { display: grid; grid-template-columns: 1fr; }
  .action { width: 100%; }
  .decision-preview { padding: 24px; }
  .section { padding-block: 72px; }
  .section-heading { margin-bottom: 32px; }
  .service-story { margin-top: 48px; padding: 28px 24px; }
  .plain-list li { grid-template-columns: 1fr; gap: 4px; }
  .information-note, .install-warning { grid-template-columns: 1fr; gap: 10px; }
  .guide-method-grid { grid-template-columns: 1fr; }
  .guide-details summary { grid-template-columns: 1fr; gap: 2px; }
  .download-toolbar { padding: 24px; }
  .indicator-grid { grid-template-columns: 1fr; }
  .news-item, .news-list > article, .news-list > a { grid-template-columns: 1fr; gap: 6px; }
  .economy-block-heading { align-items: start; flex-direction: column; gap: 8px; }
  .closing-inner { align-items: stretch; flex-direction: column; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 374px) {
  .wrap { width: min(100% - 24px, var(--content)); }
  .site-nav a { font-size: 13px; }
  .hero h1 { font-size: 34px; }
  .preview-list > div { grid-template-columns: 1fr; gap: 2px; }
  .platform-card { padding: 22px 20px; }
}

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