.page-contact {
  --c-measure: 62ch;
  --c-hint-bg: rgba(36, 28, 20, 0.05);
  background-color: var(--field-900);
  color: var(--paper);
  overflow-x: clip;
}

.page-contact .u-mono {
  font-family: var(--mono);
  letter-spacing: 0.06em;
}

/* 面包屑 */
.page-contact .breadcrumb {
  padding-top: clamp(1rem, 3vw, 1.75rem);
}

.page-contact .breadcrumb__link {
  color: var(--moss);
}

.page-contact .breadcrumb__current {
  color: var(--paper);
}

/* 首屏 */
.page-contact .contact-hero {
  border-bottom: 1px solid var(--line-700);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.75rem, 6vw, 4rem) 0 clamp(1.5rem, 4vw, 2.5rem);
}

.page-contact .contact-hero__eyebrow {
  margin: 0 0 0.9rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--moss);
}

.page-contact .contact-hero__title {
  margin: 0;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(1.9rem, 6vw, 3.4rem);
  line-height: 1.08;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .contact-hero__lead {
  margin: 1.1rem 0 0;
  max-width: 48ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--ash);
}

.page-contact .contact-facts {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-700);
}

.page-contact .contact-facts li {
  display: flex;
  gap: 0.7rem;
  align-items: baseline;
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--line-700);
  font-size: 0.8125rem;
  line-height: 1.6;
  letter-spacing: 0.03em;
  color: var(--moss);
}

.page-contact .contact-facts li::before {
  content: "";
  flex: none;
  width: 0.5rem;
  height: 0.5rem;
  background-color: var(--lemon);
  transform: translateY(-0.1rem);
}

.page-contact .yardline {
  display: block;
  width: 100%;
}

.page-contact .media-frame {
  margin: 0;
  overflow: hidden;
  background-image: linear-gradient(160deg, var(--field-800), var(--field-950));
}

.page-contact .media-frame__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .media-frame__caption {
  padding: 0.6rem 0 0;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  color: var(--moss);
}

.page-contact .contact-hero__media {
  aspect-ratio: 8 / 3;
  border-top: 1px solid var(--line-700);
}

.page-contact .contact-hero__media .media-frame__caption {
  display: none;
}

/* 通用栅格兜底 */
.page-contact .grid12 {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.5rem);
}

.page-contact .col-4,
.page-contact .col-5,
.page-contact .col-7,
.page-contact .col-8 {
  min-width: 0;
}

/* 渠道与用途 */
.page-contact .contact-channels {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
  border-bottom: 1px solid var(--line-700);
}

.page-contact .c-rail {
  background-color: var(--field-800);
  border: 1px solid var(--line-700);
  padding: clamp(1rem, 3vw, 1.5rem);
}

.page-contact .c-list {
  margin: 0;
}

.page-contact .c-list__row {
  padding: 0.9rem 0;
  border-top: 1px solid var(--line-700);
}

.page-contact .c-list__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .c-list__row:last-child {
  padding-bottom: 0;
}

.page-contact .c-list__term {
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--blue);
}

.page-contact .c-list__value {
  margin: 0.4rem 0 0;
  font-family: var(--mono);
  font-size: 0.9375rem;
  line-height: 1.6;
  letter-spacing: 0.04em;
  color: var(--paper);
  overflow-wrap: anywhere;
}

.page-contact .c-list__note {
  margin: 0.4rem 0 0;
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--moss);
}

.page-contact .contact-channels__intro {
  margin: 0 0 1rem;
  max-width: 58ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--ash);
}

.page-contact .uses {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .uses__item {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0 1rem;
  padding: 1rem 0;
  border-top: 1px solid var(--line-700);
}

.page-contact .uses__num {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  background-color: var(--flag);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.page-contact .uses__title {
  margin: 0.15rem 0 0.35rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.125rem;
  line-height: 1.4;
  color: var(--paper);
}

.page-contact .uses__text {
  margin: 0;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ash);
}

/* 纸面章节 */
.page-contact .contact-paper {
  background-color: var(--paper);
  background-image: repeating-linear-gradient(0deg, rgba(36, 28, 20, 0.035) 0 1px, transparent 1px 6px);
  color: var(--ink-900);
}

.page-contact .contact-paper .section-head__title {
  color: var(--ink-900);
}

.page-contact .contact-paper .section-head__note {
  color: var(--ink-900);
  opacity: 0.6;
}

.page-contact .contact-verify {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
}

.page-contact .contact-verify__grid {
  display: grid;
  gap: clamp(1.75rem, 4vw, 2.75rem);
}

.page-contact .contact-verify__lead {
  margin: 0;
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.8;
}

.page-contact .steps {
  list-style: none;
  margin: 1.5rem 0 0;
  padding: 0;
}

.page-contact .steps__item {
  display: grid;
  grid-template-columns: 2rem minmax(0, 1fr);
  gap: 0 1rem;
  padding: 1rem;
  margin-left: -1rem;
  margin-right: -1rem;
  border-top: 1px solid var(--ash);
  transition: background-color 0.25s var(--ease);
}

.page-contact .steps__item:hover,
.page-contact .steps__item:focus-within {
  background-color: var(--c-hint-bg);
}

.page-contact .steps__num {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  background-color: var(--flag);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.04em;
}

.page-contact .steps__title {
  margin: 0.2rem 0 0.4rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.0625rem;
  line-height: 1.4;
}

.page-contact .steps__text {
  margin: 0 0 0.6rem;
  max-width: 56ch;
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-contact .steps__hint {
  margin: 0;
  padding: 0.55rem 0.8rem;
  border-left: 2px solid var(--flag);
  background-color: var(--c-hint-bg);
  font-size: 0.8125rem;
  line-height: 1.7;
}

.page-contact .steps__hint-label {
  display: inline-block;
  margin-right: 0.5rem;
  font-family: var(--mono);
  font-size: 0.6875rem;
  letter-spacing: 0.14em;
  color: var(--flag);
}

/* 标签页 */
.page-contact .tabs {
  margin-top: 1.75rem;
}

.page-contact .tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--ash);
}

.page-contact .tabs__btn {
  padding: 0.5rem 0.85rem;
  border: 1px solid var(--ink-900);
  background-color: transparent;
  color: var(--ink-900);
  font-family: var(--mono);
  font-size: 0.8125rem;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .tabs__btn:hover {
  background-color: var(--c-hint-bg);
}

.page-contact .tabs__btn[aria-selected="true"] {
  background-color: var(--ink-900);
  color: var(--paper);
}

.page-contact .tabs__btn:focus-visible {
  outline: 2px solid var(--blue);
  outline-offset: 2px;
}

.page-contact .tabs__panel {
  padding-top: 1.25rem;
}

.page-contact .tabs__text {
  margin: 0 0 0.9rem;
  max-width: 58ch;
  font-size: 0.9375rem;
  line-height: 1.8;
}

.page-contact .field-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .field-list li {
  display: flex;
  gap: 0.6rem;
  padding: 0.55rem 0;
  border-bottom: 1px dashed var(--ash);
  font-size: 0.9375rem;
  line-height: 1.7;
}

.page-contact .field-list li::before {
  content: "";
  flex: none;
  width: 0.4rem;
  height: 0.4rem;
  margin-top: 0.65rem;
  background-color: var(--ink-900);
}

.page-contact .contact-verify__aside {
  display: grid;
  gap: 1.25rem;
  align-content: start;
}

.page-contact .contact-verify__media {
  aspect-ratio: 10 / 7;
}

.page-contact .contact-verify__media .media-frame__caption {
  color: var(--ink-900);
  opacity: 0.62;
}

.page-contact .contact-verify .meta-band {
  padding-left: 0.9rem;
  border-left: 2px solid var(--flag);
}

.page-contact .meta-band__line {
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  line-height: 1.7;
}

.page-contact .meta-band__line:last-child {
  margin-bottom: 0;
}

/* 合作与引用 */
.page-contact .contact-coop {
  padding: clamp(2rem, 5vw, 3.5rem) 0;
  border-bottom: 1px solid var(--line-700);
}

.page-contact .contact-coop__text {
  margin: 0 0 1rem;
  max-width: 56ch;
  font-size: 1rem;
  line-height: 1.85;
  color: var(--ash);
}

.page-contact .coop-panel {
  border: 1px solid var(--line-700);
  background-color: var(--field-800);
  padding: clamp(1.1rem, 3vw, 1.6rem);
}

.page-contact .coop-panel__title {
  margin: 0 0 0.9rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.125rem;
  color: var(--paper);
}

.page-contact .coop-panel__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .coop-panel__item {
  padding: 0.7rem 0;
  border-top: 1px solid var(--line-700);
  font-size: 0.9375rem;
  line-height: 1.8;
  color: var(--ash);
}

.page-contact .coop-panel__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .coop-panel__item:last-child {
  padding-bottom: 0;
}

/* 唯一色块强调：回复时效 */
.page-contact .contact-sla {
  background-color: var(--lemon);
  color: var(--ink-900);
  padding: clamp(1.75rem, 4vw, 2.75rem) 0;
  border-top: 1px solid var(--field-950);
  border-bottom: 1px solid var(--field-950);
}

.page-contact .contact-sla__inner {
  display: grid;
  gap: 1.25rem;
}

.page-contact .contact-sla__label {
  margin: 0 0 0.35rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
}

.page-contact .contact-sla__value {
  margin: 0;
  font-family: var(--mono);
  font-size: clamp(1.5rem, 4.5vw, 2.2rem);
  letter-spacing: 0.04em;
}

.page-contact .contact-sla__title {
  margin: 0 0 0.5rem;
  font-family: var(--serif);
  font-weight: 600;
  font-size: 1.125rem;
}

.page-contact .contact-sla__text {
  margin: 0;
  max-width: 64ch;
  font-size: 0.9375rem;
  line-height: 1.85;
}

/* 备案信息 */
.page-contact .contact-legal {
  padding: clamp(2rem, 5vw, 3rem) 0 0;
}

.page-contact .contact-legal__box {
  border: 1px solid var(--line-700);
  padding: clamp(1rem, 3vw, 1.5rem);
  background-color: var(--field-950);
}

.page-contact .contact-legal__title {
  margin: 0 0 0.75rem;
  font-family: var(--mono);
  font-size: 0.75rem;
  letter-spacing: 0.16em;
  color: var(--moss);
}

.page-contact .contact-legal__item {
  margin: 0 0 0.4rem;
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--paper);
}

.page-contact .contact-legal__note {
  margin: 0.85rem 0 0;
  max-width: 70ch;
  font-size: 0.8125rem;
  line-height: 1.8;
  color: var(--moss);
}

.page-contact .contact-legal__link {
  color: var(--blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-legal__link:hover,
.page-contact .contact-legal__link:focus-visible {
  color: var(--lemon);
  outline: none;
}

/* 相关入口 */
.page-contact .contact-links {
  padding: clamp(1.75rem, 4vw, 3rem) 0 clamp(2.5rem, 6vw, 4rem);
}

.page-contact .contact-links__title {
  margin: 0 0 1rem;
  font-family: var(--display);
  font-weight: 900;
  font-size: clamp(1.05rem, 3.2vw, 1.35rem);
  letter-spacing: 0.01em;
  color: var(--paper);
}

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

.page-contact .contact-links__item {
  display: grid;
  gap: 0.25rem;
  padding: 0.85rem 0;
  border-top: 1px solid var(--line-700);
}

.page-contact .contact-links__item:last-child {
  border-bottom: 1px solid var(--line-700);
}

.page-contact .contact-links__link {
  font-family: var(--mono);
  font-size: 0.875rem;
  letter-spacing: 0.06em;
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  justify-self: start;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .contact-links__link:hover,
.page-contact .contact-links__link:focus-visible {
  color: var(--lemon);
  border-bottom-color: var(--lemon);
  outline: none;
}

.page-contact .contact-links__desc {
  font-size: 0.8125rem;
  line-height: 1.7;
  color: var(--moss);
}

/* 平板与桌面 */
@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    align-items: end;
  }

  .page-contact .grid12 {
    grid-template-columns: repeat(12, minmax(0, 1fr));
  }

  .page-contact .col-4 {
    grid-column: span 4;
  }

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

  .page-contact .col-7 {
    grid-column: span 7;
  }

  .page-contact .col-8 {
    grid-column: span 8;
  }

  .page-contact .c-rail {
    position: sticky;
    top: 5.5rem;
  }

  .page-contact .contact-verify__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }

  .page-contact .contact-sla__inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    gap: 2.5rem;
    align-items: start;
  }

  .page-contact .contact-links__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: clamp(1.5rem, 3vw, 2.5rem);
  }

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

@media (max-width: 899px) {
  .page-contact .contact-hero__media {
    aspect-ratio: 16 / 9;
  }

  .page-contact .steps__item {
    margin-left: 0;
    margin-right: 0;
    padding-left: 0;
    padding-right: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .steps__item,
  .page-contact .tabs__btn,
  .page-contact .contact-links__link {
    transition: none;
  }
}