.page-contact {
  overflow-x: hidden;
}

/* ==================== 首屏 ==================== */
.page-contact .contact-hero {
  position: relative;
  padding: 32px 0 56px;
  color: var(--on-dark);
  background: linear-gradient(180deg, var(--c-ink) 0%, var(--c-rampart) 100%);
}

.page-contact .contact-hero .breadcrumb__link {
  color: var(--on-dark-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.page-contact .contact-hero .breadcrumb__link:hover,
.page-contact .contact-hero .breadcrumb__link:focus-visible {
  color: var(--c-flame);
}

.page-contact .contact-hero .breadcrumb__link[aria-current="page"] {
  color: var(--on-dark);
  pointer-events: none;
}

.page-contact .contact-hero .breadcrumb__sep {
  color: var(--on-dark-faint);
}

.page-contact .contact-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 28px;
}

.page-contact .contact-hero__copy {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-contact .contact-hero .display-1 {
  margin: 0;
  color: var(--on-dark);
}

.page-contact .contact-hero__lede {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--on-dark-dim);
}

.page-contact .contact-hero__media {
  margin: 0;
  align-self: end;
}

/* ==================== 通用章节块 ==================== */
.page-contact .contact-block {
  padding: 56px 0 64px;
}

.page-contact .contact-block--channels {
  color: var(--ink-body);
  background: var(--c-paper);
}

.page-contact .contact-block--feedback {
  color: var(--ink-body);
  background: var(--c-stone);
}

.page-contact .contact-block--collab {
  color: var(--on-dark);
  background: var(--c-deep);
}

.page-contact .contact-block--center {
  color: var(--ink-body);
  background: var(--c-paper);
}

.page-contact .contact-block--scenarios {
  color: var(--on-dark);
  background: var(--c-rampart);
}

.page-contact .contact-block--collab .chapter-band,
.page-contact .contact-block--scenarios .chapter-band {
  border-color: var(--line-dark);
}

.page-contact .contact-block__lede {
  max-width: 52ch;
  margin: 24px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--c-mid);
}

.page-contact .contact-block--collab .contact-block__lede,
.page-contact .contact-block--scenarios .contact-block__lede {
  color: var(--on-dark-dim);
}

/* ==================== 01 联络方式 ==================== */
.page-contact .channels-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 28px;
}

.page-contact .channels-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-light);
}

.page-contact .channel-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-light);
}

.page-contact .channel-row__tag {
  display: block;
  color: var(--c-flame);
  font-family: var(--font-mono);
}

.page-contact .channel-row__value {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.35;
  color: var(--c-ink);
  word-break: break-all;
}

.page-contact .channel-row__use {
  font-size: 14px;
  line-height: 1.75;
  color: var(--c-mid);
}

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

.page-contact .contact-channels__texture img {
  display: block;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-light);
}

/* ==================== 02 数据反馈 ==================== */
.page-contact .feedback-steps {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-light);
}

.page-contact .feedback-step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 24px 0;
  border-bottom: 1px solid var(--line-light);
}

.page-contact .feedback-step__num {
  font-family: var(--font-mono);
  font-size: 28px;
  font-weight: 700;
  line-height: 1;
  color: var(--c-flame);
}

.page-contact .feedback-step__title {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-contact .feedback-step__text {
  margin: 0;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-body);
}

/* ==================== 03 协作 ==================== */
.page-contact .collab-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: 32px;
}

.page-contact .collab-card {
  padding: 24px 22px;
  border: 1px solid var(--line-dark);
  background: rgba(228, 230, 232, 0.03);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .collab-card:hover {
  border-color: var(--c-flame);
  background: var(--wash-flame);
}

.page-contact .collab-card__label {
  display: block;
  margin: 0 0 12px;
  color: var(--c-flame);
}

.page-contact .collab-card__title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  color: var(--on-dark);
}

.page-contact .collab-card__text {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--on-dark-dim);
}

.page-contact .collab-card__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--line-dark);
  display: grid;
  gap: 8px;
}

.page-contact .collab-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--on-dark-dim);
}

.page-contact .collab-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 7px;
  height: 1px;
  background: var(--c-flame);
}

/* ==================== 04 运营中心 ==================== */
.page-contact .center-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  margin-top: 32px;
}

.page-contact .center-info__label,
.page-contact .center-filing__label {
  display: block;
  margin: 0 0 10px;
  color: var(--c-flame);
}

.page-contact .center-info__address {
  margin: 0 0 14px;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.75;
  color: var(--c-ink);
}

.page-contact .center-info__note {
  margin: 0;
  max-width: 44ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-mid);
}

.page-contact .center-filing {
  padding: 20px 22px;
  border: 1px solid var(--line-light);
  background: rgba(228, 230, 232, 0.45);
}

.page-contact .center-filing__icp {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 600;
  color: var(--c-ink);
  word-break: break-all;
}

.page-contact .center-filing__region {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mid);
}

/* ==================== 05 常见场景 ==================== */
.page-contact .scenarios {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  border-top: 1px solid var(--line-dark);
}

.page-contact .scenario {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-dark);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .scenario:hover {
  border-bottom-color: var(--c-flame);
}

.page-contact .scenario__q {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin: 0;
}

.page-contact .scenario__num {
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-flame);
  letter-spacing: 0.05em;
}

.page-contact .scenario__text {
  font-size: 16px;
  font-weight: 500;
  line-height: 1.65;
  color: var(--on-dark);
}

.page-contact .scenario__a {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding-left: 27px;
}

.page-contact .scenario__detail {
  font-size: 13px;
  line-height: 1.7;
  color: var(--on-dark-dim);
}

.page-contact .scenario__detail.link-arrow {
  color: var(--on-dark-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .scenario__detail.link-arrow:hover,
.page-contact .scenario__detail.link-arrow:focus-visible {
  color: var(--c-ember);
  border-bottom-color: var(--c-ember);
}

/* ==================== 平板 ==================== */
@media (min-width: 720px) {
  .page-contact .contact-hero {
    padding: 44px 0 72px;
  }

  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
    gap: 48px;
    align-items: center;
    margin-top: 36px;
  }

  .page-contact .contact-hero__lede {
    font-size: 17px;
  }

  .page-contact .channels-layout {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .channel-row {
    grid-template-columns: 128px minmax(0, 1fr);
    grid-template-rows: auto auto;
    gap: 6px 24px;
    align-items: baseline;
  }

  .page-contact .channel-row__tag {
    grid-column: 1;
    grid-row: 1 / span 2;
    align-self: start;
    padding-top: 4px;
  }

  .page-contact .channel-row__value {
    grid-column: 2;
    grid-row: 1;
  }

  .page-contact .channel-row__use {
    grid-column: 2;
    grid-row: 2;
  }

  .page-contact .feedback-step {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
    padding: 28px 0;
  }

  .page-contact .feedback-step__num {
    font-size: 44px;
    padding-top: 2px;
  }

  .page-contact .collab-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .center-layout {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .scenario {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 24px;
    align-items: center;
  }

  .page-contact .scenario__a {
    padding-left: 0;
    justify-content: flex-end;
    text-align: right;
  }
}

/* ==================== 桌面 ==================== */
@media (min-width: 1000px) {
  .page-contact .contact-block {
    padding: 72px 0 84px;
  }

  .page-contact .contact-hero__lede {
    font-size: 18px;
  }

  .page-contact .channel-row {
    grid-template-columns: 148px minmax(0, 1fr);
    padding: 24px 0;
  }

  .page-contact .channel-row__value {
    font-size: 24px;
  }

  .page-contact .feedback-step {
    grid-template-columns: 88px minmax(0, 1fr);
  }

  .page-contact .feedback-step__num {
    font-size: 54px;
  }

  .page-contact .center-info__address {
    font-size: 20px;
  }
}