.page-contact {
  --c-gap: clamp(1.25rem, 3.5vw, 2.75rem);
  --c-bg: #05070F;
  position: relative;
  background: var(--ink);
  color: var(--text);
  overflow-x: hidden;
}

.page-contact .c-top {
  padding-top: clamp(1.25rem, 3vw, 2rem);
}

/* 首屏 */
.page-contact .c-hero {
  padding-top: clamp(2rem, 6vw, 4.25rem);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  display: grid;
  gap: clamp(1rem, 2.5vw, 1.6rem);
  justify-items: start;
}

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

.page-contact .c-hero__lead {
  margin: 0;
  max-width: 42ch;
  font-size: clamp(0.95rem, 1.3vw, 1.1rem);
  line-height: 1.8;
  color: var(--text);
  opacity: 0.88;
}

.page-contact .c-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.75rem;
  width: 100%;
  border-top: 1px solid var(--line);
  padding-top: 1rem;
}

.page-contact .c-hero__meta .mono {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

/* 通用分区 */
.page-contact .c-section {
  padding-block: clamp(2.5rem, 6vw, 4.5rem);
  border-top: 1px solid var(--line);
}

.page-contact .section-head {
  max-width: 62ch;
}

.page-contact .section-head__note {
  color: var(--muted);
}

/* 直接联系 */
.page-contact .c-reach {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--c-gap);
  margin-top: clamp(1.5rem, 4vw, 2.5rem);
}

.page-contact .c-reach__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1rem;
  align-content: start;
}

.page-contact .c-card {
  position: relative;
  display: grid;
  gap: 0.55rem;
  padding: clamp(1.1rem, 2.6vw, 1.6rem);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--panel), rgba(5, 7, 15, 0.15));
  overflow: hidden;
  transition: border-color 220ms var(--ease), box-shadow 220ms var(--ease);
}

.page-contact .c-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan-a), var(--cyan-b));
  opacity: 0.75;
}

.page-contact .c-card:hover {
  border-color: var(--signal);
  box-shadow: 0 14px 34px rgba(0, 0, 0, 0.45);
}

.page-contact .c-card__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-contact .c-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(0.95rem, 1.6vw, 1.2rem);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--mint);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .c-card__use {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .c-reach__figure {
  margin: 0;
  align-self: stretch;
}

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

/* 反馈类型 */
.page-contact .c-chips {
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: clamp(1.25rem, 3vw, 1.75rem);
}

.page-contact .fb-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

.page-contact .fb-card {
  display: grid;
  gap: 0.6rem;
  align-content: start;
  padding: clamp(1.1rem, 2.6vw, 1.5rem);
  border: 1px solid var(--line);
  background: var(--ink-2);
  transition: border-color 220ms var(--ease), transform 220ms var(--ease);
}

.page-contact .fb-card:hover {
  border-color: var(--signal);
  transform: translateY(-2px);
}

.page-contact .fb-card__title {
  margin: 0;
  font-size: clamp(1.02rem, 1.5vw, 1.22rem);
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--text);
}

.page-contact .fb-card__desc {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text);
  opacity: 0.85;
}

.page-contact .fb-card__need {
  margin: 0;
  padding-top: 0.65rem;
  border-top: 1px dashed var(--line);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

/* 提交要素 */
.page-contact .c-two {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--c-gap);
  margin-top: clamp(1rem, 3vw, 1.5rem);
}

.page-contact .c-steps {
  list-style: none;
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .c-steps__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 1rem;
  align-items: start;
  padding: clamp(1rem, 2.6vw, 1.4rem);
  background: var(--ink-2);
}

.page-contact .c-steps__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--signal);
  padding-top: 3px;
}

.page-contact .c-steps__title {
  margin: 0 0 0.35rem;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text);
}

.page-contact .c-steps__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .c-aside {
  align-self: start;
  padding: clamp(1.1rem, 2.6vw, 1.6rem);
  border: 1px solid var(--line);
  border-top: 2px solid transparent;
  background:
    linear-gradient(var(--ink-2), var(--ink-2)) padding-box,
    linear-gradient(90deg, var(--cyan-a), var(--cyan-b)) border-box;
  border-image: none;
}

.page-contact .c-aside__lead {
  margin: 0.75rem 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .c-aside__list {
  list-style: none;
  margin: 1rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.page-contact .c-aside__list li {
  position: relative;
  padding-left: 1rem;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .c-aside__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 5px;
  height: 5px;
  background: var(--signal);
}

/* 响应时间线 */
.page-contact .c-timeline {
  list-style: none;
  margin: clamp(1.5rem, 4vw, 2.5rem) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .c-timeline__item {
  position: relative;
  display: grid;
  gap: 0.5rem;
  align-content: start;
  padding: clamp(1rem, 2.6vw, 1.5rem);
  background: var(--ink-2);
}

.page-contact .c-timeline__item::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan-a), var(--cyan-b));
  opacity: 0;
  transition: opacity 240ms var(--ease);
}

.page-contact .c-timeline__item:hover::after,
.page-contact .c-timeline__item:focus-within::after {
  opacity: 1;
}

.page-contact .c-timeline__time {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--signal);
}

.page-contact .c-timeline__title {
  margin: 0;
  font-size: 15px;
  font-weight: 500;
  color: var(--text);
}

.page-contact .c-timeline__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* 内容合作 */
.page-contact .c-coop {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-top: clamp(1.5rem, 4vw, 2.25rem);
}

.page-contact .c-coop__item {
  padding: clamp(1.1rem, 2.6vw, 1.5rem);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(16, 27, 54, 0.9), rgba(5, 7, 15, 0));
  display: grid;
  gap: 0.5rem;
  align-content: start;
}

.page-contact .c-coop__title {
  margin: 0;
  font-size: 15.5px;
  font-weight: 500;
  color: var(--text);
}

.page-contact .c-coop__desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .c-coop__note {
  margin: clamp(1.25rem, 3vw, 1.75rem) 0 0;
  max-width: 58ch;
  padding-left: 1rem;
  border-left: 2px solid var(--signal);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text);
  opacity: 0.9;
}

.page-contact .c-coop__note .mono {
  color: var(--mint);
  overflow-wrap: anywhere;
}

/* 到访与邮寄 */
.page-contact .c-visit {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--c-gap);
  margin-top: clamp(1rem, 3vw, 1.5rem);
}

.page-contact .c-visit__text p {
  margin: 0 0 0.9rem;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .c-visit__text p:last-child {
  margin-bottom: 0;
}

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

/* 相关入口 */
.page-contact .c-related {
  margin-top: clamp(1.75rem, 4vw, 2.5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line);
}

.page-contact .c-related ul {
  list-style: none;
  margin: 0.85rem 0 0;
  padding: 0;
  display: grid;
  gap: 0.6rem;
}

.page-contact .c-related li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .c-related a {
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(166, 255, 218, 0.35);
  transition: color 180ms var(--ease), border-color 180ms var(--ease);
}

.page-contact .c-related a:hover,
.page-contact .c-related a:focus-visible {
  color: var(--signal);
  border-bottom-color: var(--signal);
}

/* 收束细线 */
.page-contact .c-rule {
  height: 1px;
  margin-block: clamp(2rem, 5vw, 3.5rem) clamp(1.5rem, 4vw, 3rem);
  background: linear-gradient(90deg, transparent, var(--cyan-a), var(--cyan-b), transparent);
  opacity: 0.85;
}

/* 平板及桌面 */
@media (min-width: 760px) {
  .page-contact .fb-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-contact .c-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 980px) {
  .page-contact .c-reach {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: start;
  }

  .page-contact .c-two {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  }

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

  .page-contact .c-visit {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-contact .c-related ul {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem 2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .fb-card,
  .page-contact .c-card,
  .page-contact .c-timeline__item::after {
    transition: none;
  }

  .page-contact .fb-card:hover {
    transform: none;
  }
}
</>>PAGE_CSS>>