:root {
  --paper: #f0ece4;
  --paper-deep: #ded7cc;
  --ink: #111716;
  --pine: #123a36;
  --pine-deep: #092723;
  --mint: #78b9aa;
  --copper: #c36c3f;
  --line: rgba(17, 23, 22, 0.18);
  --muted: #626660;
  --white: #fbfaf7;
  --sans: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  --serif: "Songti SC", "Noto Serif SC", STSong, Georgia, serif;
}

* {
  box-sizing: border-box;
}

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

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--sans);
  line-height: 1.75;
  overflow-wrap: anywhere;
}

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

figure,
p,
dl,
dd {
  margin: 0;
}

h1,
h2,
h3 {
  margin: 0;
  font-weight: 500;
  text-wrap: balance;
}

a {
  color: inherit;
}

.section-shell {
  width: min(1440px, calc(100% - 80px));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: minmax(320px, 0.8fr) minmax(620px, 1.2fr);
  align-items: stretch;
  min-height: 104px;
  color: var(--ink);
  background: rgba(240, 236, 228, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 15px 32px;
  border-right: 1px solid var(--line);
}

.brand-mark {
  width: 56px;
  height: 56px;
  object-fit: contain;
}

.brand-name {
  font-family: var(--serif);
  font-size: 25px;
  font-weight: 700;
  letter-spacing: 0.12em;
}

.brand-domain {
  margin-top: 3px;
  color: var(--muted);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.22em;
}

.primary-nav {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.primary-nav a {
  display: grid;
  place-items: center;
  min-height: 104px;
  padding: 12px;
  border-right: 1px solid var(--line);
  text-align: center;
  text-decoration: none;
  font-size: 14px;
  transition: color 180ms ease, background-color 180ms ease;
}

.primary-nav a:last-child {
  border-right: 0;
}

.primary-nav a:hover {
  color: var(--white);
  background: var(--pine);
}

.primary-nav a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--copper);
  outline-offset: -3px;
}

.cover {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(520px, 1.15fr);
  min-height: calc(100svh - 104px);
  color: var(--white);
  background: var(--pine-deep);
  overflow: hidden;
}

.cover::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 31%;
  background-image: linear-gradient(rgba(120, 185, 170, 0.08) 1px, transparent 1px), linear-gradient(90deg, rgba(120, 185, 170, 0.08) 1px, transparent 1px);
  background-size: 34px 34px;
  pointer-events: none;
}

.cover-copy {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(60px, 8vw, 140px) clamp(36px, 6vw, 104px);
}

.kicker,
.section-no {
  color: var(--copper);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.22em;
  text-transform: uppercase;
}

.cover h1 {
  max-width: 720px;
  margin-top: 24px;
  font-family: var(--serif);
  font-size: clamp(46px, 5.5vw, 92px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.cover h1 span {
  display: block;
  margin-top: 16px;
  color: var(--mint);
  font-size: 0.42em;
  line-height: 1.4;
  letter-spacing: 0.04em;
}

.tagline {
  margin-top: 34px;
  color: var(--white);
  font-family: var(--serif);
  font-size: clamp(19px, 2vw, 27px);
}

.cover-intro {
  max-width: 680px;
  margin-top: 22px;
  color: rgba(251, 250, 247, 0.7);
  font-size: 15px;
}

.cover-index {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 36px;
  padding-top: 20px;
  border-top: 1px solid rgba(251, 250, 247, 0.18);
  color: rgba(251, 250, 247, 0.72);
  font-size: 12px;
  letter-spacing: 0.1em;
}

.cover-index span::before {
  content: "＋";
  margin-right: 4px;
  color: var(--mint);
}

.cover-visual {
  position: relative;
  min-height: 620px;
  background: #0d1313;
}

.cover-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(9, 39, 35, 0.32), transparent 28%), linear-gradient(0deg, rgba(9, 39, 35, 0.22), transparent 42%);
  pointer-events: none;
}

.cover-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 54% center;
  filter: contrast(1.04);
}

.cover-number {
  position: absolute;
  right: 24px;
  bottom: 18px;
  z-index: 3;
  color: rgba(251, 250, 247, 0.74);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.24em;
}

.profile {
  display: grid;
  grid-template-columns: 0.75fr 1.15fr;
  gap: 5vw 8vw;
  padding-block: clamp(90px, 11vw, 170px);
}

.profile-heading {
  align-self: start;
  position: sticky;
  top: 148px;
}

.section-heading h2,
.creation-title-block h2,
.app-guide-head h2 {
  max-width: 790px;
  margin-top: 18px;
  font-family: var(--serif);
  font-size: clamp(38px, 5vw, 70px);
  line-height: 1.15;
}

.section-lead {
  margin-top: 20px;
  color: var(--pine);
  font-family: var(--serif);
  font-size: 21px;
}

.profile-statement {
  display: grid;
  gap: 22px;
  max-width: 780px;
  padding-top: 55px;
  color: #343a37;
  font-size: clamp(16px, 1.3vw, 19px);
}

.profile-ledger {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  margin-top: 22px;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.profile-ledger div {
  min-height: 160px;
  padding: 25px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.profile-ledger dt,
.footer-ledger dt {
  color: var(--muted);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.14em;
}

.profile-ledger dd {
  margin-top: 30px;
  font-family: var(--serif);
  font-size: 20px;
}

.works {
  padding-block: clamp(90px, 10vw, 150px);
  color: var(--white);
  background: var(--ink);
}

.works-head {
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  gap: 70px;
  align-items: end;
}

.works-intro {
  color: rgba(251, 250, 247, 0.64);
  font-size: 16px;
}

.reading-rail {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 70px;
  border-top: 1px solid rgba(251, 250, 247, 0.18);
  border-left: 1px solid rgba(251, 250, 247, 0.18);
}

.reading-rail article {
  min-height: 320px;
  padding: 28px;
  border-right: 1px solid rgba(251, 250, 247, 0.18);
  border-bottom: 1px solid rgba(251, 250, 247, 0.18);
}

.rail-no {
  color: var(--mint);
  font-family: var(--serif);
  font-size: 44px;
}

.reading-rail h3 {
  margin-top: 70px;
  font-size: 22px;
}

.reading-rail article > p:last-child {
  max-width: 340px;
  margin-top: 13px;
  color: rgba(251, 250, 247, 0.58);
  font-size: 14px;
}

.visual-essay {
  display: grid;
  grid-template-columns: 1.08fr 0.7fr 0.7fr;
  gap: 22px;
  align-items: start;
  margin-top: 130px;
}

.gallery-intro {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 0.5fr 1fr 0.9fr;
  gap: 30px;
  align-items: end;
  margin-bottom: 26px;
}

.gallery-intro h3 {
  max-width: 650px;
  font-family: var(--serif);
  font-size: clamp(30px, 4vw, 56px);
  line-height: 1.18;
}

.gallery-intro > p:last-child {
  color: rgba(251, 250, 247, 0.58);
  font-size: 14px;
}

.gallery-card {
  min-width: 0;
}

.gallery-card img {
  width: 100%;
  object-fit: cover;
  background: #1e2423;
}

.gallery-card--wide img {
  aspect-ratio: 4 / 3;
}

.gallery-card--portrait img {
  aspect-ratio: 4 / 5;
}

.gallery-card--offset {
  margin-top: 90px;
}

.gallery-card figcaption {
  padding-top: 16px;
  color: rgba(251, 250, 247, 0.62);
  font-size: 13px;
}

.gallery-card figcaption span {
  display: block;
  margin-bottom: 5px;
  color: var(--mint);
  font-size: 10px;
  font-weight: 760;
  letter-spacing: 0.18em;
}

.creation {
  display: grid;
  grid-template-columns: 0.78fr 1.22fr;
  gap: 7vw;
  padding-block: clamp(100px, 12vw, 180px);
}

.creation-title-block > p:last-child {
  max-width: 580px;
  margin-top: 24px;
  color: var(--muted);
}

.creation-grid {
  border-top: 1px solid var(--line);
}

.creation-grid article {
  display: grid;
  grid-template-columns: 120px 0.75fr 1fr;
  gap: 28px;
  padding: 31px 0;
  border-bottom: 1px solid var(--line);
}

.creation-label {
  color: var(--copper);
  font-size: 11px;
  font-weight: 760;
  letter-spacing: 0.14em;
}

.creation-grid h3 {
  font-family: var(--serif);
  font-size: 22px;
  line-height: 1.4;
}

.creation-grid article > p:last-child {
  color: var(--muted);
  font-size: 14px;
}

.source-note {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 32px;
  margin-top: 46px;
  padding: 28px 32px;
  color: var(--white);
  background: var(--pine);
}

.source-note-title {
  color: var(--mint);
  font-size: 12px;
  font-weight: 760;
  letter-spacing: 0.16em;
}

.source-note > p:last-child {
  color: rgba(251, 250, 247, 0.7);
}

.app-guide {
  padding-block: clamp(90px, 10vw, 150px);
  color: var(--white);
  background: var(--pine);
}

.app-guide-head {
  display: grid;
  grid-template-columns: 0.4fr 1fr 0.9fr;
  gap: 40px;
  align-items: end;
}

.app-guide-head .section-no {
  color: var(--mint);
}

.app-guide-head h2 {
  margin-top: 0;
}

.app-guide-head > p:last-child {
  color: rgba(251, 250, 247, 0.65);
}

.faq-list {
  margin-top: 65px;
  border-top: 1px solid rgba(251, 250, 247, 0.22);
}

.faq-list details {
  border-bottom: 1px solid rgba(251, 250, 247, 0.22);
}

.faq-list summary {
  position: relative;
  padding: 26px 62px 26px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--serif);
  font-size: clamp(19px, 2vw, 27px);
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 22px;
  color: var(--mint);
  font-family: var(--sans);
  font-size: 30px;
  font-weight: 300;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  max-width: 900px;
  padding: 0 62px 27px 0;
  color: rgba(251, 250, 247, 0.65);
}

.site-footer {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  gap: 70px;
  padding: 70px 40px 30px;
  background: var(--paper-deep);
}

.footer-name {
  font-family: var(--serif);
  font-size: 34px;
}

.footer-brand > p:last-child {
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.footer-ledger {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-top: 1px solid var(--line);
}

.footer-ledger div {
  padding: 18px 20px 10px 0;
  border-right: 1px solid var(--line);
}

.footer-ledger div:not(:first-child) {
  padding-left: 20px;
}

.footer-ledger div:last-child {
  border-right: 0;
}

.footer-ledger dd {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.copyright {
  grid-column: 1 / -1;
  margin-top: 35px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 11px;
}

@media (max-width: 1100px) {
  .site-header {
    grid-template-columns: 1fr;
  }

  .brand-lockup {
    min-height: 82px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .primary-nav a {
    min-height: 60px;
  }

  html {
    scroll-padding-top: 142px;
  }

  .cover {
    grid-template-columns: 1fr;
  }

  .cover-visual {
    min-height: min(64vw, 720px);
  }

  .profile-heading {
    position: static;
  }

  .works-head,
  .creation {
    grid-template-columns: 1fr;
  }

  .gallery-intro {
    grid-template-columns: 1fr 1.2fr;
  }

  .gallery-intro > p:last-child {
    grid-column: 2;
  }

  .app-guide-head {
    grid-template-columns: 1fr 1.2fr;
  }

  .app-guide-head > p:last-child {
    grid-column: 2;
  }
}

@media (max-width: 760px) {
  .section-shell {
    width: min(100% - 36px, 680px);
  }

  .site-header {
    position: relative;
  }

  .brand-lockup {
    padding-inline: 18px;
  }

  .brand-mark {
    width: 48px;
    height: 48px;
  }

  .brand-name {
    font-size: 21px;
  }

  .brand-domain {
    font-size: 8px;
    letter-spacing: 0.16em;
  }

  .primary-nav {
    display: flex;
    gap: 0;
    padding: 0 10px;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .primary-nav::-webkit-scrollbar {
    display: none;
  }

  .primary-nav a {
    flex: 0 0 auto;
    min-height: 54px;
    padding: 0 12px;
    border-right: 0;
    font-size: 12px;
  }

  html {
    scroll-padding-top: 18px;
  }

  .cover-copy {
    padding: 65px 24px 55px;
  }

  .cover h1 {
    font-size: clamp(42px, 14vw, 62px);
  }

  .cover-visual {
    min-height: 72vw;
  }

  .cover::before {
    width: 100%;
  }

  .profile {
    grid-template-columns: 1fr;
  }

  .profile-statement {
    padding-top: 0;
  }

  .profile-ledger {
    grid-template-columns: repeat(2, 1fr);
  }

  .profile-ledger div {
    min-height: 136px;
    padding: 20px;
  }

  .profile-ledger dd {
    margin-top: 22px;
    font-size: 17px;
  }

  .works-head {
    gap: 26px;
  }

  .reading-rail {
    grid-template-columns: 1fr;
    margin-top: 45px;
  }

  .reading-rail article {
    min-height: 220px;
  }

  .reading-rail h3 {
    margin-top: 30px;
  }

  .visual-essay {
    grid-template-columns: 1fr 1fr;
    margin-top: 85px;
  }

  .gallery-intro {
    grid-template-columns: 1fr;
  }

  .gallery-intro > p:last-child {
    grid-column: auto;
  }

  .gallery-card--wide {
    grid-column: 1 / -1;
  }

  .gallery-card--offset {
    margin-top: 45px;
  }

  .creation {
    gap: 50px;
  }

  .creation-grid article {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .source-note {
    grid-template-columns: 1fr;
  }

  .app-guide-head {
    grid-template-columns: 1fr;
  }

  .app-guide-head > p:last-child {
    grid-column: auto;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 38px;
    padding-inline: 20px;
  }

  .footer-ledger {
    grid-template-columns: 1fr;
  }

  .footer-ledger div,
  .footer-ledger div:not(:first-child) {
    padding: 16px 0;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }
}

@media (max-width: 480px) {
  .profile-ledger,
  .visual-essay {
    grid-template-columns: 1fr;
  }

  .gallery-card--wide {
    grid-column: auto;
  }

  .gallery-card--offset {
    margin-top: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}