:root {
  --ink: #173149;
  --ink-strong: #0f283f;
  --muted: #667b8e;
  --blue: #169bd2;
  --blue-dark: #087ead;
  --green: #2b8c78;
  --surface: #f3f8fa;
  --surface-green: #eef7f3;
  --line: #d9e6ec;
  --white: #ffffff;
  --content-width: 1200px;
  color-scheme: light;
  font-family: "Pretendard", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-synthesis: none;
  letter-spacing: 0;
}

* {
  box-sizing: border-box;
}

html {
  background: var(--white);
  color: var(--ink);
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: inherit;
  font-size: 17px;
  line-height: 1.75;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

img {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

a:focus-visible,
summary:focus-visible {
  outline: 3px solid rgba(22, 155, 210, 0.38);
  outline-offset: 4px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(23, 49, 73, 0.1);
  background: rgba(255, 255, 255, 0.96);
}

.site-header__inner {
  width: min(var(--content-width), calc(100% - 48px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.site-logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.site-logo img {
  width: auto;
  height: 28px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 30px;
  color: #4f6477;
  font-size: 14px;
  font-weight: 600;
}

.site-nav a {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover {
  color: var(--blue-dark);
  border-bottom-color: var(--blue);
}

.site-nav .site-nav__contact {
  min-height: 40px;
  padding: 0 19px;
  border: 0;
  border-radius: 6px;
  background: var(--blue);
  color: var(--white);
}

.site-nav .site-nav__contact:hover {
  border: 0;
  background: var(--blue-dark);
  color: var(--white);
}

.mobile-menu {
  display: none;
  position: relative;
}

.mobile-menu summary {
  width: 44px;
  height: 44px;
  display: grid;
  align-content: center;
  justify-items: center;
  gap: 5px;
  cursor: pointer;
  list-style: none;
}

.mobile-menu summary::-webkit-details-marker {
  display: none;
}

.mobile-menu summary span {
  width: 22px;
  height: 2px;
  background: var(--ink);
}

.mobile-menu nav {
  position: absolute;
  top: 52px;
  right: 0;
  width: min(280px, calc(100vw - 32px));
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 18px 45px rgba(15, 40, 63, 0.14);
}

.mobile-menu nav a {
  display: flex;
  min-height: 46px;
  padding: 0 12px;
  align-items: center;
  border-radius: 5px;
  font-size: 15px;
  font-weight: 600;
}

.mobile-menu nav a:hover {
  background: var(--surface);
  color: var(--blue-dark);
}

.article-header {
  width: min(var(--content-width), calc(100% - 48px));
  margin: 0 auto;
  padding: 88px 0 72px;
}

.article-header__copy {
  width: min(830px, 100%);
  margin-bottom: 48px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--blue-dark);
  font-size: 13px;
  font-weight: 800;
  line-height: 1.4;
}

h1,
h2,
p {
  letter-spacing: 0;
}

h1 {
  margin: 0;
  color: var(--ink-strong);
  font-size: clamp(40px, 5.2vw, 68px);
  font-weight: 800;
  line-height: 1.13;
}

.article-lead {
  max-width: 740px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 21px;
  line-height: 1.65;
}

.article-meta {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: #7b8d9b;
  font-size: 14px;
  line-height: 1.5;
}

.hero-media,
.article-media {
  margin: 0;
}

.hero-media img,
.article-media img {
  height: auto;
}

.hero-media img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
}

figcaption {
  margin-top: 10px;
  color: #7b8d9b;
  font-size: 13px;
  line-height: 1.55;
}

.article-layout {
  width: min(1050px, calc(100% - 48px));
  margin: 0 auto;
  padding: 24px 0 112px;
  display: grid;
  grid-template-columns: 190px minmax(0, 760px);
  gap: 96px;
  align-items: start;
}

.article-index {
  position: sticky;
  top: 108px;
  padding-top: 12px;
  border-top: 2px solid var(--ink);
}

.article-index p {
  margin: 0 0 16px;
  color: var(--ink-strong);
  font-size: 14px;
  font-weight: 800;
}

.article-index ol {
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
  list-style: none;
  counter-reset: section;
}

.article-index li {
  counter-increment: section;
}

.article-index a {
  min-height: 44px;
  display: grid;
  grid-template-columns: 25px 1fr;
  gap: 6px;
  align-items: center;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.45;
}

.article-index a::before {
  content: counter(section, decimal-leading-zero);
  color: var(--blue-dark);
  font-weight: 700;
}

.article-index a:hover {
  color: var(--ink);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-body {
  min-width: 0;
}

.article-section {
  scroll-margin-top: 92px;
  padding: 78px 0;
  border-top: 1px solid var(--line);
}

.article-section:first-child {
  padding-top: 10px;
  border-top: 0;
}

.section-number {
  margin: 0 0 15px;
  color: var(--blue-dark);
  font-size: 14px;
  font-weight: 800;
  line-height: 1;
}

.article-section h2 {
  margin: 0 0 28px;
  color: var(--ink-strong);
  font-size: 34px;
  font-weight: 800;
  line-height: 1.32;
}

.article-section > p:not(.section-number) {
  margin: 0 0 19px;
  color: #40586c;
  font-size: 18px;
  line-height: 1.85;
}

.article-media {
  margin-top: 38px;
}

.article-media img {
  width: 100%;
  border-radius: 8px;
  object-fit: cover;
  background: var(--surface);
}

.article-media--screen img {
  aspect-ratio: 1200 / 716;
  border: 1px solid #223248;
  object-fit: contain;
}

.notice {
  margin-top: 38px;
  padding: 26px 28px;
  border-left: 4px solid var(--green);
  background: var(--surface-green);
}

.notice strong {
  display: block;
  margin-bottom: 8px;
  color: #176b5a;
  font-size: 16px;
}

.notice p {
  margin: 0;
  color: #3f655d;
  font-size: 15px;
  line-height: 1.75;
}

.process-list {
  margin: 42px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--line);
  list-style: none;
}

.process-list li {
  min-width: 0;
  padding: 24px 20px 26px 0;
}

.process-list li + li {
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.process-list strong,
.process-list span {
  display: block;
}

.process-list strong {
  margin-bottom: 8px;
  color: var(--blue-dark);
  font-size: 16px;
}

.process-list span {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.65;
}

blockquote {
  margin: 38px 0;
  padding: 8px 0 8px 28px;
  border-left: 3px solid var(--blue);
  color: var(--ink-strong);
  font-size: 24px;
  font-weight: 700;
  line-height: 1.55;
}

.media-pair {
  margin-top: 38px;
  display: grid;
  gap: 20px;
}

.media-pair .article-media {
  margin-top: 0;
}

.text-link {
  width: fit-content;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--blue-dark);
  font-size: 15px;
  font-weight: 800;
}

.text-link:hover {
  text-decoration: underline;
  text-underline-offset: 5px;
}

.article-cta {
  background: var(--ink-strong);
  color: var(--white);
}

.article-cta__inner {
  width: min(1050px, calc(100% - 48px));
  min-height: 300px;
  margin: 0 auto;
  padding: 64px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
}

.article-cta .eyebrow {
  color: #55c4ef;
}

.article-cta h2 {
  margin: 0;
  font-size: 36px;
  line-height: 1.3;
}

.article-cta p:not(.eyebrow) {
  max-width: 600px;
  margin: 14px 0 0;
  color: #c4d2dc;
  font-size: 17px;
}

.primary-button {
  min-width: 182px;
  min-height: 50px;
  padding: 0 22px;
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  background: var(--blue);
  color: var(--white);
  font-size: 15px;
  font-weight: 800;
}

.primary-button:hover {
  background: #25afe3;
}

.site-footer {
  padding: 64px 0 28px;
  border-top: 1px solid var(--line);
  background: var(--white);
}

.site-footer__inner {
  width: min(var(--content-width), calc(100% - 48px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(260px, 1.5fr) 1fr 1fr;
  gap: 64px;
}

.site-footer__brand img {
  width: auto;
  height: 24px;
}

.site-footer__brand p,
.site-footer__contact p {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.site-footer nav,
.site-footer__contact {
  display: grid;
  align-content: start;
  gap: 10px;
}

.site-footer nav a,
.site-footer__contact a {
  width: fit-content;
  min-width: 44px;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  color: #536a7d;
  font-size: 13px;
  font-weight: 600;
}

.site-footer nav a:hover,
.site-footer__contact a:hover {
  color: var(--blue-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.site-footer__copyright {
  width: min(var(--content-width), calc(100% - 48px));
  margin: 48px auto 0;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: #8a9aa7;
  font-size: 12px;
}

@media (max-width: 960px) {
  .article-layout {
    width: min(760px, calc(100% - 48px));
    display: block;
  }

  .article-index {
    position: static;
    margin-bottom: 48px;
    padding: 22px 0;
    border-bottom: 1px solid var(--line);
  }

  .article-index ol {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-cta__inner {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 760px) {
  body {
    font-size: 16px;
  }

  .site-header__inner,
  .article-header,
  .article-layout,
  .article-cta__inner,
  .site-footer__inner,
  .site-footer__copyright {
    width: min(100% - 32px, var(--content-width));
  }

  .site-header__inner {
    min-height: 64px;
  }

  .site-nav {
    display: none;
  }

  .mobile-menu {
    display: block;
  }

  .article-header {
    padding: 56px 0 52px;
  }

  .article-header__copy {
    margin-bottom: 32px;
  }

  h1 {
    font-size: 40px;
  }

  .article-lead {
    margin-top: 22px;
    font-size: 18px;
  }

  .article-layout {
    padding-bottom: 72px;
  }

  .article-index {
    margin-bottom: 22px;
  }

  .article-index ol {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .article-section {
    padding: 58px 0;
  }

  .article-section h2 {
    margin-bottom: 22px;
    font-size: 28px;
  }

  .article-section > p:not(.section-number) {
    font-size: 17px;
    line-height: 1.8;
  }

  .process-list {
    grid-template-columns: 1fr;
  }

  .process-list li,
  .process-list li + li {
    padding: 20px 0;
    border-left: 0;
  }

  .process-list li + li {
    border-top: 1px solid var(--line);
  }

  blockquote {
    padding-left: 20px;
    font-size: 21px;
  }

  .notice {
    padding: 22px 20px;
  }

  .article-cta__inner {
    min-height: 0;
    padding: 54px 0;
    gap: 30px;
  }

  .article-cta h2 {
    font-size: 30px;
  }

  .primary-button {
    width: 100%;
  }

  .site-footer {
    padding-top: 48px;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 390px) {
  h1 {
    font-size: 36px;
  }

  .article-section h2,
  .article-cta h2 {
    font-size: 26px;
  }
}