.page-contact {
  --contact-rule: 1px solid var(--line);
  --contact-pad: clamp(1.25rem, 3.2vw, 2.25rem);
  padding-bottom: var(--gap-xl);
}

.page-contact .contact-hero {
  display: grid;
  gap: var(--gap-lg);
  padding-top: var(--gap-md);
  align-items: start;
}

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

.page-contact .contact-hero h1 {
  margin: var(--gap-sm) 0 var(--gap-md);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 7vw, 3.5rem);
  line-height: 1.12;
  letter-spacing: -.01em;
  color: var(--chalk);
}

.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 46ch;
  font-size: 1rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--gap-sm);
  margin-top: var(--gap-md);
}

.page-contact .contact-hero__strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  margin: var(--gap-lg) 0 0;
  border-top: var(--contact-rule);
}

.page-contact .contact-hero__stat {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--gap-sm);
  padding: .7rem 0;
  border-bottom: var(--contact-rule);
}

.page-contact .contact-hero__stat dt {
  font-family: var(--font-section);
  font-size: .8125rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--mist-teal);
}

.page-contact .contact-hero__stat dd {
  margin: 0;
  font-size: .875rem;
  color: var(--text-soft);
}

.page-contact .contact-hero__stat dd .data-value {
  color: var(--chalk);
  font-size: 1rem;
}

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

.page-contact .contact-hero__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

/* 章节通用头 */
.page-contact .contact-section {
  margin-top: clamp(3rem, 8vw, 5.5rem);
}

.page-contact .contact-section__head {
  max-width: 62ch;
  margin-bottom: var(--gap-lg);
}

.page-contact .contact-section__head .section-title {
  margin: var(--gap-sm) 0 var(--gap-sm);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.6vw, 2.4rem);
  line-height: 1.2;
  color: var(--chalk);
}

.page-contact .contact-section__lead {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--text-soft);
}

/* 四宫格问题卡 */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .channel-card {
  background: var(--bg);
  min-width: 0;
}

.page-contact .channel-card__link {
  display: grid;
  gap: .45rem;
  padding: var(--contact-pad);
  height: 100%;
  text-decoration: none;
  color: inherit;
  border-left: 3px solid transparent;
  transition: background-color .2s ease, border-color .2s ease;
}

.page-contact .channel-card__link:hover,
.page-contact .channel-card__link:focus-visible {
  background: var(--surface);
  border-left-color: var(--sand-green);
}

.page-contact .channel-card__no {
  font-family: var(--font-data);
  font-size: .8125rem;
  letter-spacing: .16em;
  color: var(--mist-teal);
}

.page-contact .channel-card__title {
  font-family: var(--font-section);
  font-weight: 700;
  font-size: 1.125rem;
  line-height: 1.35;
  color: var(--chalk);
}

.page-contact .channel-card__desc {
  font-size: .875rem;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-contact .channel-card__meta {
  margin-top: .35rem;
  font-family: var(--font-data);
  font-size: .75rem;
  letter-spacing: .02em;
  color: var(--mist-teal);
}

/* 渠道明细行 */
.page-contact .channel-rows {
  margin: var(--gap-lg) 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--contact-rule);
}

.page-contact .channel-row {
  display: grid;
  gap: .6rem;
  padding: 1.35rem 0;
  border-bottom: var(--contact-rule);
  scroll-margin-top: 7rem;
}

.page-contact .channel-row__no {
  font-family: var(--font-data);
  font-size: .8125rem;
  letter-spacing: .16em;
  color: var(--slate-mute);
}

.page-contact .channel-row__title {
  margin: 0 0 .4rem;
  font-family: var(--font-section);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--chalk);
}

.page-contact .channel-row__text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-contact .channel-row__mail,
.page-contact .channel-row__phone {
  font-family: var(--font-data);
  font-size: .875rem;
  color: var(--sand-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(183, 227, 106, .45);
  word-break: break-all;
}

.page-contact .channel-row__mail:hover,
.page-contact .channel-row__mail:focus-visible,
.page-contact .channel-row__phone:hover,
.page-contact .channel-row__phone:focus-visible {
  border-bottom-width: 2px;
  color: var(--sand-green);
}

/* 响应节奏 */
.page-contact .response-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-strong);
  background-image: repeating-linear-gradient(90deg, var(--line-strong) 0 1px, transparent 1px 26px);
  background-repeat: repeat-x;
  background-size: 100% 10px;
  background-position: left top;
}

.page-contact .response-item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .35rem .9rem;
  padding: 1.4rem 0;
  border-bottom: var(--contact-rule);
  align-items: start;
}

.page-contact .response-item__mark {
  width: 9px;
  height: 9px;
  margin-top: .55rem;
  background: var(--sand-green);
  box-shadow: 0 0 0 4px rgba(183, 227, 106, .16);
}

.page-contact .response-item__body {
  min-width: 0;
}

.page-contact .response-item__title {
  margin: 0 0 .35rem;
  font-family: var(--font-section);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--chalk);
}

.page-contact .response-item__text {
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-contact .response-item__value {
  grid-column: 2;
  font-family: var(--font-data);
  font-size: 1.5rem;
  line-height: 1.2;
  color: var(--ember-orange);
}

.page-contact .response-note {
  margin: var(--gap-md) 0 0;
  padding-left: .9rem;
  border-left: 2px solid var(--mist-teal);
  font-size: .875rem;
  line-height: 1.75;
  color: var(--slate-mute);
}

/* 合作章节（暖纸色） */
.page-contact .contact-coop {
  margin-top: clamp(3rem, 8vw, 5.5rem);
  color: var(--ink-abyss);
  padding: clamp(2rem, 6vw, 4rem) 0;
}

.page-contact .contact-coop__inner {
  display: grid;
  gap: var(--gap-lg);
  width: min(100%, var(--shell));
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-contact .contact-coop .eyebrow {
  color: #5a5340;
}

.page-contact .contact-coop .section-title {
  margin: var(--gap-sm) 0 var(--gap-md);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.6rem, 4.6vw, 2.4rem);
  line-height: 1.2;
  color: var(--ink-abyss);
}

.page-contact .contact-coop__lead {
  margin: 0 0 var(--gap-md);
  font-size: .9375rem;
  line-height: 1.8;
  color: #23313a;
}

.page-contact .coop-list {
  margin: 0 0 var(--gap-md);
  padding: 0;
  list-style: none;
  border-top: 1px solid rgba(7, 19, 28, .22);
}

.page-contact .coop-list__item {
  padding: .9rem 0;
  border-bottom: 1px solid rgba(7, 19, 28, .16);
}

.page-contact .coop-list__title {
  margin: 0 0 .25rem;
  font-family: var(--font-section);
  font-weight: 700;
  font-size: 1rem;
  color: var(--ink-abyss);
}

.page-contact .coop-list__item p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: #2b3942;
}

.page-contact .coop-topic {
  margin: 0 0 var(--gap-md);
  font-size: .875rem;
  line-height: 1.75;
  color: #23313a;
}

.page-contact .coop-topic strong {
  font-family: var(--font-data);
  font-size: .8125rem;
  letter-spacing: .02em;
  color: #0f4b46;
}

.page-contact .contact-coop__figure {
  margin: 0;
  min-width: 0;
}

.page-contact .contact-coop__figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  border: 1px solid rgba(7, 19, 28, .2);
}

.page-contact .contact-coop__figure .image-frame__caption {
  color: #4a5a60;
}

/* 来函与到访 */
.page-contact .visit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .visit-card {
  background: var(--bg);
  padding: var(--contact-pad);
  background-image:
    linear-gradient(to right, rgba(127, 179, 174, .12) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(127, 179, 174, .12) 1px, transparent 1px);
  background-size: 34px 34px;
}

.page-contact .visit-card__label {
  margin: 0 0 .6rem;
  font-family: var(--font-section);
  font-size: .8125rem;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--mist-teal);
}

.page-contact .visit-card__address {
  margin: 0 0 .6rem;
  font-size: 1rem;
  line-height: 1.7;
  color: var(--chalk);
}

.page-contact .visit-card__phone {
  margin: 0 0 .6rem;
  font-family: var(--font-data);
  font-size: clamp(1.25rem, 4vw, 1.75rem);
  color: var(--ember-orange);
  letter-spacing: .02em;
}

.page-contact .visit-card__meta {
  margin: 0;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--slate-mute);
}

.page-contact .visit-details {
  margin-top: var(--gap-md);
  border-top: var(--contact-rule);
  border-bottom: var(--contact-rule);
}

.page-contact .visit-details__summary {
  padding: .9rem 0;
  font-family: var(--font-section);
  font-weight: 700;
  font-size: 1rem;
  color: var(--sand-green);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .visit-details__summary::before {
  content: "+";
  display: inline-block;
  width: 1.2em;
  font-family: var(--font-data);
  color: var(--mist-teal);
}

.page-contact .visit-details[open] .visit-details__summary::before {
  content: "–";
}

.page-contact .visit-details__body {
  padding: 0 0 1.1rem 1.2em;
}

.page-contact .visit-details__body p {
  margin: 0 0 .6rem;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-contact .visit-details__body p:last-child {
  margin-bottom: 0;
}

/* 提交前自查 */
.page-contact .check-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .check-list__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: var(--gap-sm);
  align-items: start;
  padding: 1.15rem var(--contact-pad);
  background: var(--surface);
}

.page-contact .check-list__no {
  font-family: var(--font-data);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--sand-green);
}

.page-contact .check-list__item p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--text-soft);
}

/* 自助入口 */
.page-contact .contact-help {
  margin-top: clamp(3rem, 8vw, 5.5rem);
  padding-top: var(--gap-lg);
  border-top: 1px solid var(--line-strong);
}

.page-contact .contact-help__title {
  margin: 0 0 var(--gap-sm);
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.5rem, 4.4vw, 2.1rem);
  line-height: 1.2;
  color: var(--chalk);
}

.page-contact .contact-help__lead {
  margin: 0 0 var(--gap-md);
  font-size: .9375rem;
  line-height: 1.75;
  color: var(--text-soft);
}

.page-contact .help-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .help-links__item {
  background: var(--bg);
}

.page-contact .help-links__link {
  display: block;
  padding: 1.1rem var(--contact-pad);
  text-decoration: none;
  color: inherit;
  transition: background-color .2s ease;
}

.page-contact .help-links__link:hover,
.page-contact .help-links__link:focus-visible {
  background: var(--harbor-blue);
}

.page-contact .help-links__label {
  display: block;
  font-family: var(--font-section);
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: .04em;
  color: var(--sand-green);
  margin-bottom: .3rem;
}

.page-contact .help-links__desc {
  display: block;
  font-size: .8125rem;
  line-height: 1.7;
  color: var(--text-soft);
}

.page-contact .contact-help__foot {
  margin: var(--gap-md) 0 0;
  font-size: .875rem;
  color: var(--slate-mute);
}

.page-contact .contact-help__foot a {
  color: var(--mist-teal);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 720px) {
  .page-contact .channel-grid,
  .page-contact .check-list,
  .page-contact .visit-grid,
  .page-contact .help-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-contact .contact-hero__stat {
    flex-direction: column;
    align-items: flex-start;
    gap: .35rem;
    padding: 1rem 0;
    border-bottom: none;
    border-right: var(--contact-rule);
    padding-right: var(--gap-sm);
  }

  .page-contact .contact-hero__stat:last-child {
    border-right: none;
  }

  .page-contact .response-item {
    grid-template-columns: auto 1fr auto;
    align-items: center;
  }

  .page-contact .response-item__value {
    grid-column: auto;
    grid-row: 1;
    font-size: 1.75rem;
    text-align: right;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: var(--gap-xl);
    padding-top: var(--gap-lg);
  }

  .page-contact .contact-coop__inner {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: var(--gap-xl);
    align-items: start;
  }

  .page-contact .channel-row {
    grid-template-columns: 3.5rem minmax(0, 1fr) minmax(0, 16rem);
    gap: var(--gap-md);
    align-items: start;
    padding: 1.6rem 0;
  }

  .page-contact .channel-row__no {
    padding-top: .3rem;
  }

  .page-contact .channel-row__action {
    text-align: right;
    padding-top: .3rem;
  }

  .page-contact .help-links {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .check-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card__link,
  .page-contact .help-links__link {
    transition: none;
  }
}
<<<END>>>