.page-contact {
  --contact-gap: 26px;
  background: var(--paper);
  color: var(--ink);
}

.page-contact .breadcrumb {
  padding: 22px 0 4px;
}

.page-contact .page-head {
  padding-bottom: 4px;
}

.page-contact .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--rock);
  text-transform: uppercase;
}

.page-contact .page-head__title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: 30px;
  line-height: 1.25;
  margin: 12px 0 14px;
  max-width: 20em;
  color: var(--ink);
}

.page-contact .page-head__sub {
  max-width: 46em;
  margin: 0;
}

/* ---------- 双栏主体 ---------- */
.page-contact .contact-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
  align-items: start;
}

/* ---------- 左侧联络窄栏 ---------- */
.page-contact .contact-rail {
  display: grid;
  gap: 16px;
}

.page-contact .rail-card {
  position: relative;
  padding: 20px 20px 22px 26px;
  background: var(--paper-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-organic);
  box-shadow: var(--shadow-1);
}

.page-contact .rail-card::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 22px;
  bottom: 22px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--gold), var(--gold-soft));
}

.page-contact .rail-card--deep {
  background: var(--deep);
  border-color: rgba(244, 239, 227, 0.18);
  color: var(--paper);
  box-shadow: var(--shadow-2);
}

.page-contact .rail-card--deep::before {
  background: linear-gradient(180deg, var(--gold), rgba(201, 162, 39, 0));
}

.page-contact .channel__kind {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--rock);
}

.page-contact .rail-card--deep .channel__kind {
  color: var(--gold);
}

.page-contact .channel__value {
  display: block;
  margin: 8px 0;
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: 0.02em;
  line-height: 1.5;
  color: var(--deep);
  overflow-wrap: anywhere;
}

.page-contact .rail-card--deep .channel__value {
  font-size: 15px;
  color: var(--paper);
}

.page-contact .channel__hint {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--rock);
}

.page-contact .rail-card--deep .channel__hint {
  color: var(--cream-soft);
}

.page-contact .rail-note {
  padding: 16px 18px;
  border: 1px dashed var(--line);
  border-radius: var(--radius-organic);
}

.page-contact .rail-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--rock);
}

/* ---------- 右侧信笺栏 ---------- */
.page-contact .letter {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-contact .figure {
  margin: 0;
}

.page-contact .figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  border-radius: var(--radius-m);
}

.page-contact .figure__cap {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  line-height: 1.6;
  color: var(--rock);
}

.page-contact .sheet {
  position: relative;
  overflow: hidden;
  padding: 24px 18px 30px;
  background: linear-gradient(180deg, #FBF7EE 0%, var(--paper) 100%);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-organic);
  box-shadow: var(--shadow-1);
}

.page-contact .sheet::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(180deg, var(--line-soft) 0 1px, transparent 1px 34px);
  opacity: 0.16;
  pointer-events: none;
}

.page-contact .sheet > * {
  position: relative;
  z-index: 1;
}

.page-contact .sheet__head {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding: 0 0 16px;
  border-bottom: 1px solid var(--gold-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--rock);
}

.page-contact .sheet-section {
  padding: 26px 0 4px;
  margin-top: 22px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .sheet-section:first-of-type {
  padding-top: 20px;
  margin-top: 18px;
  border-top: 0;
}

.page-contact .section-marker {
  display: flex;
  align-items: center;
  gap: 10px;
}

.page-contact .section-marker__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-contact .section-marker__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--rock);
  text-transform: uppercase;
}

.page-contact .section-marker__line {
  flex: 1 1 auto;
  height: 1px;
  background: linear-gradient(90deg, var(--gold-soft), transparent);
}

.page-contact .sheet-section h2 {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 22px;
  line-height: 1.3;
  margin: 12px 0 12px;
  color: var(--ink);
}

.page-contact .sheet-section p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .sheet-section a {
  color: var(--cinnabar);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .sheet-section a:hover {
  color: var(--cinnabar-2);
}

.page-contact .sheet-section a:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
  border-radius: 3px;
}

/* 清单 */
.page-contact .check-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.page-contact .check-list li {
  position: relative;
  padding: 10px 0 10px 26px;
  border-bottom: 1px dashed var(--line-soft);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
}

.page-contact .check-list li:last-child {
  border-bottom: 0;
}

.page-contact .check-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 18px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cinnabar);
}

/* 字段填写示意 */
.page-contact .field-sketch {
  display: block;
  width: 100%;
  height: auto;
  max-width: 620px;
  margin: 6px 0 22px;
}

.page-contact .field-sketch__label {
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  fill: var(--deep);
}

.page-contact .field-sketch__value {
  font-family: var(--font-mono);
  font-size: 13px;
  fill: var(--rock);
}

.page-contact .field-sketch__rule {
  stroke: var(--line);
  stroke-width: 1;
  stroke-dasharray: 4 4;
}

.page-contact .field-sketch__ring {
  fill: none;
  stroke: var(--cinnabar);
  stroke-width: 1.5;
}

.page-contact .field-sketch__tick {
  fill: none;
  stroke: var(--cinnabar);
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 信件示例 */
.page-contact .mail-sample {
  margin: 6px 0 20px;
  padding: 20px 18px 18px 20px;
  background: var(--paper-2);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius-s);
}

.page-contact .mail-sample__row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 14px;
  margin: 0 0 10px;
  padding-bottom: 10px;
  border-bottom: 1px dotted var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.6;
}

.page-contact .mail-sample__key {
  color: var(--rock);
  letter-spacing: 0.08em;
}

.page-contact .mail-sample__val {
  color: var(--deep);
  overflow-wrap: anywhere;
}

.page-contact .mail-sample__body {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .mail-sample__body p {
  margin: 0 0 8px;
  font-size: 15px;
}

.page-contact .mail-sample__body p:last-child {
  margin-bottom: 0;
}

/* 通信地址深色块 */
.page-contact .address-card {
  margin: 4px 0 20px;
  padding: 24px 22px;
  background: var(--deep);
  color: var(--paper);
  border-radius: var(--radius-organic);
  box-shadow: var(--shadow-2);
}

.page-contact .address-card__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-contact .address-card__value {
  margin: 0 0 12px;
  font-family: var(--font-head);
  font-size: 19px;
  line-height: 1.5;
  color: var(--paper);
}

.page-contact .address-card__note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--cream-soft);
}

/* 折叠问答 */
.page-contact .fold {
  border-top: 1px solid var(--line-soft);
}

.page-contact .fold:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .fold__head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

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

.page-contact .fold__head::after {
  content: "+";
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cinnabar);
}

.page-contact .fold[open] .fold__head::after {
  content: "–";
}

.page-contact .fold__head:hover {
  color: var(--cinnabar);
}

.page-contact .fold__head:focus-visible {
  outline: 2px solid var(--cinnabar);
  outline-offset: 2px;
  border-radius: 3px;
}

.page-contact .fold__body {
  padding: 0 0 20px;
}

.page-contact .fold__body p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--rock);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact {
    --contact-gap: 32px;
  }

  .page-contact .page-head__title {
    font-size: 38px;
  }

  .page-contact .letter {
    gap: 28px;
  }

  .page-contact .sheet {
    padding: 34px 34px 40px;
  }

  .page-contact .sheet-section h2 {
    font-size: 26px;
  }

  .page-contact .address-card__value {
    font-size: 21px;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-shell {
    grid-template-columns: minmax(0, 5fr) minmax(0, 8fr);
    gap: 56px;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 92px;
  }

  .page-contact .page-head__title {
    font-size: 44px;
  }

  .page-contact .sheet {
    padding: 40px 48px 48px;
  }
}