.page-contact {
  --letter-paper: #F7F1E4;
  --letter-line: rgba(223, 211, 188, 0.95);
  --contact-gap: clamp(1.5rem, 3vw, 3rem);
  background: var(--paper);
  color: var(--text-ink);
}

.page-contact .breadcrumb {
  padding-top: clamp(1.1rem, 2.4vw, 1.8rem);
}

/* ---------- hero ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(1.6rem, 4vw, 3rem) 0 clamp(2.4rem, 5vw, 4.2rem);
  background:
    radial-gradient(120% 90% at 88% 8%, rgba(87, 175, 174, 0.16), transparent 62%),
    linear-gradient(180deg, var(--ink) 0%, #123043 72%, #16394c 100%);
  color: var(--paper);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: auto -6% -55% 42%;
  height: 78%;
  border-radius: 50%;
  border: 1px dashed rgba(192, 139, 62, 0.32);
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .coordinate-line {
  color: var(--tide);
}

.page-contact .contact-hero__eyebrow {
  margin: clamp(1.4rem, 3vw, 2.4rem) 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--brass);
}

.page-contact .contact-hero__title {
  margin: 0 0 1.1rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.1rem, 6.6vw, 4.3rem);
  line-height: 1.16;
  letter-spacing: 0.01em;
  max-width: 22ch;
}

.page-contact .contact-hero__title br {
  display: none;
}

.page-contact .contact-hero__lede {
  max-width: 46ch;
  color: rgba(243, 237, 224, 0.86);
}

.page-contact .contact-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
  margin-top: clamp(1.4rem, 3vw, 2.2rem);
}

/* ---------- letter split ---------- */
.page-contact .letter {
  padding-top: clamp(2.4rem, 5vw, 4rem);
}

.page-contact .letter__grid {
  display: grid;
  gap: var(--contact-gap);
  grid-template-columns: 1fr;
}

.page-contact .letter__aside {
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-contact .letter__card {
  background:
    repeating-linear-gradient(180deg, transparent 0 5px, rgba(223, 211, 188, 0.28) 5px 6px),
    var(--letter-paper);
  border: 1px dashed var(--paper-line);
  border-left: 3px solid var(--ochre);
  border-radius: 2px;
  padding: 1.1rem 1.15rem 1.2rem;
  box-shadow: 0 10px 24px rgba(11, 34, 49, 0.06);
}

.page-contact .letter__card--clock {
  border-left-color: var(--tide-deep);
}

.page-contact .letter__card-label {
  margin: 0 0 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--graphite);
  text-transform: uppercase;
}

.page-contact .letter__mail,
.page-contact .letter__phone,
.page-contact .letter__clock {
  margin: 0 0 0.7rem;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 3.3vw, 1.22rem);
  letter-spacing: 0.02em;
  line-height: 1.4;
  color: var(--text-ink);
  word-break: break-word;
}

.page-contact .letter__phone {
  color: var(--ochre);
}

.page-contact .letter__clock {
  color: var(--tide-deep);
}

.page-contact .letter__hint {
  margin: 0;
  font-size: 0.83rem;
  line-height: 1.7;
  color: var(--graphite);
}

.page-contact .letter__copy {
  padding: 0.45rem 0.95rem;
  font-size: 0.84rem;
}

.page-contact .letter__copy[data-copied="true"] {
  border-color: var(--tide-deep);
  color: var(--tide-deep);
}

.page-contact .letter__body {
  min-width: 0;
}

.page-contact .letter__body .prose a {
  color: var(--tide-deep);
}

.page-contact .letter__body .section-head {
  margin-top: 0;
}

/* routing list */
.page-contact .routing {
  list-style: none;
  margin: clamp(1.6rem, 3vw, 2.2rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--letter-line);
}

.page-contact .routing__item {
  display: grid;
  gap: 0.35rem;
  padding: 1.15rem 0 1.2rem;
  border-bottom: 1px solid var(--letter-line);
  transition: transform 0.25s ease, background-color 0.25s ease;
}

.page-contact .routing__tag {
  justify-self: start;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  color: var(--ochre);
  border: 1px solid rgba(166, 67, 42, 0.34);
  border-radius: 999px;
  padding: 0.2rem 0.6rem;
}

.page-contact .routing__title {
  margin: 0.2rem 0 0;
  font-family: var(--font-display);
  font-size: 1.16rem;
  font-weight: 700;
  color: var(--text-ink);
}

.page-contact .routing__text {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.78;
  color: var(--graphite);
}

.page-contact .routing__text a {
  color: var(--tide-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- request ---------- */
.page-contact .tide {
  background:
    linear-gradient(160deg, var(--harbor) 0%, var(--ink) 58%, #0e2a3b 100%);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.page-contact .tide::before {
  content: "";
  position: absolute;
  top: -14%;
  left: -8%;
  width: 46%;
  height: 130%;
  background: radial-gradient(circle at 30% 40%, rgba(87, 175, 174, 0.2), transparent 68%);
  pointer-events: none;
}

.page-contact .tide .shell {
  position: relative;
  z-index: 1;
}

.page-contact .section-head--ondark .section-head__title {
  color: var(--paper);
}

.page-contact .section-head--ondark .section-head__index {
  color: var(--coral);
}

.page-contact .section-head--ondark .section-head__note {
  color: rgba(243, 237, 224, 0.7);
}

.page-contact .tide__grid {
  display: grid;
  gap: var(--contact-gap);
  grid-template-columns: 1fr;
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-contact .prose--ondark {
  color: rgba(243, 237, 224, 0.86);
  max-width: 52ch;
}

.page-contact .steps {
  list-style: none;
  margin: clamp(1.4rem, 3vw, 2rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1.1rem;
  counter-reset: step;
}

.page-contact .steps__item {
  position: relative;
  padding-left: 1.2rem;
  border-left: 2px solid rgba(87, 175, 174, 0.4);
}

.page-contact .steps__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--tide);
  margin-bottom: 0.25rem;
}

.page-contact .steps__title {
  margin: 0 0 0.3rem;
  font-family: var(--font-display);
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .steps__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.76;
  color: rgba(243, 237, 224, 0.76);
}

.page-contact .tide__figure {
  margin: 0;
  border: 1px solid rgba(87, 175, 174, 0.28);
  background: rgba(243, 237, 224, 0.05);
  padding: 0.6rem;
  border-radius: 3px;
}

.page-contact .tide__figure .frame__cap {
  color: rgba(243, 237, 224, 0.66);
}

.page-contact .tide__figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  border-radius: 2px;
}

/* mail template */
.page-contact .mail-template {
  margin-top: clamp(1.6rem, 3.4vw, 2.4rem);
  border: 1px solid var(--glass-line);
  background: var(--glass);
  border-radius: 3px;
  overflow: hidden;
}

.page-contact .mail-template__summary {
  cursor: pointer;
  padding: 0.95rem 1.1rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.1em;
  color: var(--tide);
  list-style: none;
}

.page-contact .mail-template__summary::-webkit-details-marker {
  display: none;
}

.page-contact .mail-template__summary::before {
  content: "+ ";
  color: var(--brass);
}

.page-contact .mail-template[open] .mail-template__summary::before {
  content: "– ";
}

.page-contact .mail-template__body {
  padding: 0 1.1rem 1.2rem;
}

.page-contact .mail-template__pre {
  margin: 0 0 0.8rem;
  padding: 1rem;
  background: rgba(11, 34, 49, 0.55);
  border: 1px dashed rgba(223, 211, 188, 0.3);
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.85;
  color: var(--paper);
  white-space: pre-wrap;
  overflow-x: auto;
}

.page-contact .mail-template__note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: rgba(243, 237, 224, 0.72);
}

/* ---------- prepare ---------- */
.page-contact .prepare__grid {
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-contact .prepare__card {
  background: var(--letter-paper);
  border-top: 3px solid var(--ochre);
  padding: 1.3rem 1.2rem 1.4rem;
}

.page-contact .prepare__card:nth-child(2) {
  border-top-color: var(--tide-deep);
}

.page-contact .prepare__card:nth-child(3) {
  border-top-color: var(--brass);
}

.page-contact .prepare__label {
  margin: 0 0 0.35rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
  color: var(--graphite);
}

.page-contact .prepare__title {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 700;
  color: var(--text-ink);
}

.page-contact .prepare__list {
  margin: 0;
  padding-left: 1.1rem;
  display: grid;
  gap: 0.5rem;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--graphite);
}

.page-contact .prepare__list li::marker {
  color: var(--ochre);
}

.page-contact .prepare__foot {
  margin: clamp(1.5rem, 3vw, 2.1rem) 0 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--graphite);
  border-left: 3px solid var(--tide);
  padding-left: 1rem;
}

.page-contact .prepare__foot a {
  color: var(--tide-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- cooperation ---------- */
.page-contact .coop__grid {
  margin-top: clamp(1.4rem, 3vw, 2rem);
}

.page-contact .coop__card {
  padding: 1.3rem 1.2rem 1.4rem;
  border: 1px solid var(--glass-line);
  color: var(--paper);
}

.page-contact .coop__card .tag {
  display: inline-block;
  margin-bottom: 0.7rem;
}

.page-contact .coop__title {
  margin: 0 0 0.55rem;
  font-family: var(--font-display);
  font-size: 1.14rem;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .coop__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: rgba(243, 237, 224, 0.78);
}

.page-contact .coop__foot {
  margin: clamp(1.5rem, 3vw, 2rem) 0 0;
  padding-top: 1.1rem;
  border-top: 1px solid rgba(87, 175, 174, 0.28);
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(243, 237, 224, 0.8);
  max-width: 68ch;
}

/* ---------- address ---------- */
.page-contact .address {
  padding-bottom: clamp(2.6rem, 5vw, 4.2rem);
  background:
    linear-gradient(180deg, var(--paper) 0%, #EFE7D8 100%);
}

.page-contact .address__list {
  margin: clamp(1.3rem, 3vw, 2rem) 0 0;
  padding: 0;
  border-top: 1px solid var(--letter-line);
}

.page-contact .address__row {
  display: grid;
  gap: 0.25rem;
  padding: 0.85rem 0;
  border-bottom: 1px dashed var(--letter-line);
}

.page-contact .address__key {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--graphite);
  text-transform: uppercase;
}

.page-contact .address__val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 2.6vw, 1.08rem);
  letter-spacing: 0.02em;
  color: var(--text-ink);
  word-break: break-word;
}

.page-contact .address__val[data-selectable]::selection,
.page-contact .address__val[data-selectable] *::selection {
  background: var(--tide);
  color: var(--ink);
}

.page-contact .address__note {
  margin: clamp(1.3rem, 3vw, 1.9rem) 0 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--graphite);
}

.page-contact .address__note a {
  color: var(--tide-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .address__sign {
  margin: 1.4rem 0 0;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 3vw, 1.5rem);
  font-weight: 700;
  color: var(--ochre);
  letter-spacing: 0.06em;
}

/* ---------- focus states ---------- */
.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--tide);
  outline-offset: 3px;
}

/* ---------- responsive ---------- */
@media (min-width: 720px) {
  .page-contact .contact-hero__title br {
    display: inline;
  }

  .page-contact .address__row {
    grid-template-columns: minmax(9rem, 14rem) 1fr;
    align-items: baseline;
    gap: 1.2rem;
  }

  .page-contact .routing__item {
    grid-template-columns: minmax(6.5rem, 8rem) 1fr;
    align-items: start;
    column-gap: 1.2rem;
  }

  .page-contact .routing__tag {
    grid-row: span 2;
    align-self: start;
  }
}

@media (min-width: 960px) {
  .page-contact .letter__grid {
    grid-template-columns: minmax(240px, 32%) 1fr;
    align-items: start;
    gap: clamp(2rem, 4.5vw, 4.2rem);
  }

  .page-contact .letter__aside {
    position: sticky;
    top: calc(var(--header-h) + 1.5rem);
  }

  .page-contact .tide__grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: start;
    gap: clamp(2rem, 4vw, 3.4rem);
  }

  .page-contact .coop__grid {
    gap: clamp(1.2rem, 2.4vw, 1.8rem);
  }
}
<<<END>>>