.page-contact {
  --c-card-radius: var(--r-lg);
  --c-dash: rgba(136, 149, 173, .34);
}

.page-contact .grid-12 {
  align-items: start;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  margin-top: 6px;
  padding: 30px 24px 34px;
  border: 1px solid var(--line);
  border-radius: var(--c-card-radius);
  overflow: hidden;
  background:
    radial-gradient(120% 150% at 4% -30%, rgba(92, 140, 255, .20), transparent 62%),
    radial-gradient(90% 130% at 100% -20%, rgba(232, 65, 44, .15), transparent 64%),
    linear-gradient(180deg, #101728 0%, rgba(8, 12, 22, .55) 100%);
}

.page-contact .contact-hero .eyebrow {
  margin-bottom: 14px;
}

.page-contact .page-title {
  margin: 0 0 18px;
  font-size: clamp(38px, 8vw, 72px);
  font-weight: 800;
  line-height: 1.02;
  letter-spacing: -.03em;
  color: var(--hi);
}

.page-contact .contact-hero .lede {
  max-width: 64ch;
  margin: 0 0 22px;
  font-size: clamp(16px, 2.6vw, 19px);
  line-height: 1.75;
  color: var(--paper);
}

.page-contact .contact-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

/* ---------- 通用 ---------- */

.page-contact .inline-link {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid rgba(92, 140, 255, .42);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}

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

.page-contact .section-title {
  margin: 0;
  font-size: clamp(23px, 4vw, 32px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
  color: var(--hi);
}

.page-contact .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px 22px;
  margin-bottom: 26px;
}

.page-contact .section-head .section-note {
  flex: 1 1 22ch;
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 两栏主体 ---------- */

.page-contact .contact-layout {
  position: relative;
  row-gap: 44px;
}

.page-contact .contact-layout::before {
  content: "";
  display: none;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 58.3333%;
  border-left: 1px dashed var(--c-dash);
  transform: translateX(-14px);
}

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

.page-contact .channel-card {
  position: relative;
  padding: 24px 22px 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--c-card-radius);
  background: linear-gradient(180deg, rgba(16, 23, 40, .98), rgba(16, 23, 40, .76));
  transition: border-color var(--dur) var(--ease), transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  top: 22px;
  bottom: 22px;
  left: 0;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: var(--line);
  transition: background var(--dur) var(--ease);
}

.page-contact .channel-card--red::after {
  background: var(--red);
}

.page-contact .channel-card--yellow::after {
  background: var(--yellow);
}

.page-contact .channel-card + .channel-card::before {
  content: "";
  position: absolute;
  left: 34px;
  top: -18px;
  height: 18px;
  border-left: 1px dashed var(--c-dash);
}

.page-contact .channel-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px 14px;
  margin-bottom: 16px;
}

.page-contact .channel-name {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--paper);
}

.page-contact .channel-value {
  margin: 0 0 14px;
  font-family: var(--font-data);
  font-size: clamp(17px, 4.4vw, 24px);
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -.01em;
  font-variant-numeric: tabular-nums;
  text-align: right;
  color: var(--hi);
  overflow-wrap: anywhere;
}

.page-contact .channel-value--sm {
  font-size: clamp(13px, 3.2vw, 15px);
  font-weight: 400;
  line-height: 1.7;
  letter-spacing: 0;
  color: var(--paper);
}

.page-contact .channel-use {
  margin: 0 0 12px;
  max-width: 48ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-contact .channel-card .note {
  margin: 0;
}

@media (hover: hover) {
  .page-contact .channel-card:hover {
    transform: translateY(-3px);
    border-color: rgba(92, 140, 255, .5);
    box-shadow: var(--shadow);
  }
}

/* ---------- 图 ---------- */

.page-contact .media-frame {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: var(--c-card-radius);
  overflow: hidden;
  background: var(--panel);
}

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

.page-contact .contact-desk {
  margin-top: 20px;
}

.page-contact .contact-flow {
  margin-bottom: 26px;
}

.page-contact .reply-side {
  padding-left: 18px;
  border-left: 1px dashed var(--c-dash);
}

.page-contact .reply-side .eyebrow {
  margin-bottom: 12px;
}

.page-contact .reply-side-text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .reply-side .note {
  margin: 0;
}

/* ---------- 提交清单 ---------- */

.page-contact .submit-layout {
  row-gap: 30px;
}

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

.page-contact .submit-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .submit-idx {
  padding-top: 3px;
  font-family: var(--font-data);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  font-variant-numeric: tabular-nums;
  color: var(--yellow);
}

.page-contact .submit-item h3 {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
  color: var(--hi);
}

.page-contact .submit-item p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

/* ---------- 回复节奏 ---------- */

.page-contact .reply-layout {
  row-gap: 30px;
}

.page-contact .reply-layout .lede {
  margin: 16px 0 0;
  max-width: 44ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .reply-panel {
  padding: 4px 22px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: linear-gradient(180deg, rgba(16, 23, 40, .95), rgba(16, 23, 40, .68));
}

.page-contact .reply-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

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

.page-contact .reply-key {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-contact .reply-val {
  margin: 0;
  max-width: 52ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--paper);
}

.page-contact .reply-val strong {
  font-family: var(--font-data);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--yellow);
}

.page-contact .reply-layout .note {
  margin: 14px 0 0;
}

/* ---------- 站点信息 ---------- */

.page-contact .site-block {
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--c-card-radius);
  background: linear-gradient(160deg, rgba(16, 23, 40, .95) 0%, rgba(8, 12, 22, .5) 100%);
}

.page-contact .site-block .eyebrow {
  margin-bottom: 12px;
}

.page-contact .site-facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
  margin: 20px 0 18px;
}

.page-contact .site-facts dt {
  margin-bottom: 6px;
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}

.page-contact .site-facts dd {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--hi);
}

.page-contact .mono {
  font-family: var(--font-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: -.01em;
}

.page-contact .site-block .note {
  margin: 0;
  max-width: 70ch;
}

/* ---------- 响应式 ---------- */

@media (min-width: 600px) {
  .page-contact .reply-row {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-contact .submit-item {
    grid-template-columns: 46px minmax(0, 1fr);
    gap: 22px;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: 46px 44px 50px;
  }

  .page-contact .contact-layout::before {
    display: block;
  }

  .page-contact .channel-card {
    padding: 28px 30px 26px 32px;
  }

  .page-contact .site-block {
    padding: 36px 40px;
  }

  .page-contact .reply-side {
    padding-left: 24px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .channel-card::after,
  .page-contact .inline-link {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
  }
}