.page-contact {
  --contact-grid: rgba(23, 54, 43, 0.55);
  --contact-tint: rgba(52, 229, 192, 0.06);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-top: 40px;
  padding-bottom: 8px;
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 32px;
  margin-top: 28px;
}

.page-contact .contact-hero__kicker {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  margin: 0 0 14px;
  text-transform: uppercase;
}

.page-contact .contact-hero h1 {
  font-family: var(--serif);
  font-weight: 600;
  font-size: clamp(1.9rem, 6.4vw, 3.2rem);
  line-height: 1.22;
  letter-spacing: 0.01em;
  margin: 0 0 18px;
  color: var(--text);
}

.page-contact .contact-hero__lede {
  max-width: 46ch;
  color: var(--muted);
  margin: 0;
}

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

.page-contact .contact-hero__figure .frame__media {
  border: 1px solid var(--line);
}

.page-contact .contact-hero__figure .frame__media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  display: block;
}

.page-contact .contact-hero__figure .frame__shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(4, 16, 12, 0.25) 0%, rgba(4, 16, 12, 0.72) 100%);
}

.page-contact .contact-hero__figure .frame__media {
  position: relative;
  overflow: hidden;
}

.page-contact .contact-hero__figure .frame__caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--tick);
}

/* 锚点导航 */
.page-contact .contact-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  margin-top: 34px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-contact .contact-jump__link {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .contact-jump__link:hover,
.page-contact .contact-jump__link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--orange);
}

.page-contact .contact-jump__link.is-current {
  color: var(--cyan);
  border-bottom-color: var(--orange);
}

/* ---------- 渠道面板 ---------- */
.page-contact .channels__grid {
  display: grid;
  gap: 16px;
}

.page-contact .channels__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-contact .contact-card {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px 24px;
}

.page-contact .contact-card--mail {
  border-left: 3px solid var(--cyan);
  background: linear-gradient(160deg, var(--contact-tint) 0%, rgba(12, 33, 26, 0) 62%), var(--panel);
}

.page-contact .contact-card--phone {
  border-left: 3px solid var(--orange);
}

.page-contact .contact-card__idx {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--tick);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.page-contact .contact-card__title {
  font-family: var(--sans);
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 14px;
}

.page-contact .contact-mail__value {
  font-family: var(--mono);
  font-size: clamp(1rem, 4.4vw, 1.7rem);
  letter-spacing: -0.01em;
  color: var(--cyan);
  margin: 0 0 16px;
  word-break: break-all;
  line-height: 1.3;
}

.page-contact .contact-phone__value {
  display: inline-block;
  font-family: var(--narrow);
  font-size: clamp(2rem, 9vw, 3rem);
  letter-spacing: -0.01em;
  line-height: 1;
  color: var(--white);
  text-decoration: none;
  margin: 0 0 16px;
  border-bottom: 2px solid var(--line);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .contact-phone__value:hover,
.page-contact .contact-phone__value:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

.page-contact .contact-addr__value {
  font-size: 17px;
  line-height: 1.6;
  color: var(--text);
  margin: 0 0 14px;
}

.page-contact .contact-card__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

.page-contact .contact-card__actions {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
  margin: 20px 0 16px;
}

.page-contact .contact-copy__status {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--cyan);
  min-height: 1em;
}

.page-contact .contact-card__note {
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--tick);
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}

.page-contact .contact-card__figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--panel);
  padding: 10px;
}

.page-contact .contact-card__figure .frame__media {
  position: relative;
  overflow: hidden;
}

.page-contact .contact-card__figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  display: block;
}

.page-contact .contact-card__figure .frame__caption {
  margin-top: 10px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--tick);
}

.page-contact .panel__foot {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  font-size: 11.5px;
  letter-spacing: 0.05em;
  color: var(--tick);
}

/* ---------- 来函类型 ---------- */
.page-contact .filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
}

.page-contact .letter-list {
  display: grid;
  gap: 14px;
}

.page-contact .letter-item {
  position: relative;
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 20px 22px;
}

.page-contact .letter-item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 42px;
  height: 2px;
  background: var(--orange);
}

.page-contact .letter-item__num {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--tick);
  margin: 6px 0 10px;
}

.page-contact .letter-item__title {
  font-family: var(--serif);
  font-size: 19px;
  font-weight: 600;
  color: var(--text);
  margin: 0 0 10px;
}

.page-contact .letter-item__desc {
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0 0 16px;
}

.page-contact .letter-fields {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 7px;
}

.page-contact .letter-fields li {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--text);
  padding-left: 18px;
  position: relative;
}

.page-contact .letter-fields li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 响应节奏与合作对接 ---------- */
.page-contact .followup {
  display: grid;
  gap: 20px;
}

.page-contact .info-block {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px 22px 28px;
}

.page-contact .info-block--coop {
  border-top: 2px solid var(--cyan);
}

.page-contact .info-block--timing {
  border-top: 2px solid var(--orange);
}

.page-contact .info-block__kicker {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--tick);
  margin: 0 0 12px;
  text-transform: uppercase;
}

.page-contact .info-block__title {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 4.6vw, 1.7rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--text);
  margin: 0 0 20px;
}

.page-contact .info-block__lede {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 0 22px;
}

.page-contact .info-block__foot {
  font-size: 13px;
  line-height: 1.7;
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.page-contact .timing-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .timing-list li {
  display: grid;
  gap: 6px;
}

.page-contact .timing-list__time {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--cyan);
}

.page-contact .timing-list__text {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .coop-steps {
  list-style: none;
  counter-reset: coop;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .coop-steps li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
}

.page-contact .coop-steps__num {
  font-family: var(--narrow);
  font-size: 26px;
  line-height: 1;
  color: var(--orange);
  letter-spacing: -0.01em;
  padding-top: 2px;
}

.page-contact .coop-steps h3 {
  font-family: var(--sans);
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text);
  margin: 0 0 6px;
}

.page-contact .coop-steps p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

/* ---------- 站点信息 ---------- */
.page-contact .site-info {
  background-color: var(--panel);
  background-image:
    linear-gradient(var(--contact-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid) 1px, transparent 1px);
  background-size: 36px 36px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 24px 20px;
}

.page-contact .site-info__list {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .site-info__row {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .site-info__row:last-child {
  border-bottom: 0;
}

.page-contact .site-info__row dt {
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--tick);
  padding-top: 3px;
}

.page-contact .site-info__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--text);
}

.page-contact .site-info__note {
  margin: 18px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 索引 ---------- */
.page-contact .contact-index {
  margin-top: 32px;
}

.page-contact .contact-index .index-list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "num title"
    "num note";
  gap: 4px 14px;
  align-items: baseline;
}

.page-contact .contact-index .index-list__num {
  grid-area: num;
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--tick);
}

.page-contact .contact-index .index-list__title {
  grid-area: title;
}

.page-contact .contact-index .index-list__note {
  grid-area: note;
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding-top: 64px;
  }

  .page-contact .contact-hero__grid {
    grid-template-columns: 1fr 1.1fr;
    align-items: end;
    gap: 48px;
  }

  .page-contact .contact-jump {
    gap: 4px 32px;
  }

  .page-contact .channels__grid {
    grid-template-columns: repeat(12, 1fr);
    gap: 18px;
  }

  .page-contact .contact-card--mail {
    grid-column: span 7;
    padding: 30px 28px 32px;
    display: flex;
    flex-direction: column;
  }

  .page-contact .channels__aside {
    grid-column: span 5;
  }

  .page-contact .contact-card__actions {
    margin-top: auto;
  }

  .page-contact .followup {
    grid-template-columns: 5fr 7fr;
    gap: 24px;
    align-items: start;
  }

  .page-contact .info-block {
    padding: 32px 30px 34px;
  }

  .page-contact .letter-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .letter-item:first-child {
    grid-column: span 2;
    max-width: 62%;
  }

  .page-contact .site-info {
    padding: 30px 34px;
  }

  .page-contact .site-info__row {
    grid-template-columns: 130px 1fr;
    padding: 14px 0;
  }

  .page-contact .contact-index {
    margin-top: 48px;
  }
}

@media (min-width: 1200px) {
  .page-contact .contact-mail__value {
    font-size: 2rem;
  }

  .page-contact .letter-item:first-child {
    max-width: 58%;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-jump__link,
  .page-contact .contact-phone__value {
    transition: none;
  }
}