.page-contact {
  --pc-gap: 64px;
  --pc-line: rgba(43, 227, 196, 0.14);
}

.page-contact .breadcrumb {
  margin-bottom: 28px;
}

.page-contact .contact-hero {
  display: grid;
  gap: 32px;
  align-items: end;
}

.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(34px, 7.2vw, 66px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  margin: 14px 0 20px;
  max-width: 14ch;
  color: var(--text);
}

.page-contact .lede {
  font-size: 16px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 48ch;
  margin: 0;
}

.page-contact .contact-hero-media .media-frame {
  border-radius: var(--radius-l);
  border: 1px solid var(--pc-line);
  overflow: hidden;
}

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

/* ---------- 渠道 + 来信清单 ---------- */

.page-contact .contact-board {
  margin-top: var(--pc-gap);
  display: grid;
  gap: 28px;
}

.page-contact .board-channels {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .board-channels .section-title {
  margin-bottom: 10px;
}

.page-contact .channel-card {
  position: relative;
  background: var(--ink-1);
  border: 1px solid rgba(43, 227, 196, 0.1);
  border-radius: var(--radius-l);
  padding: 22px 22px 22px 26px;
  overflow: hidden;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22px;
  bottom: 22px;
  width: 3px;
  border-radius: 999px;
}

.page-contact .channel-card--mail::before { background: var(--cyan); }
.page-contact .channel-card--line::before { background: var(--yellow); }
.page-contact .channel-card--addr::before { background: var(--muted); }

.page-contact .channel-kind {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  margin: 0 0 8px;
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: clamp(16px, 4vw, 21px);
  letter-spacing: 0.01em;
  line-height: 1.4;
  color: var(--text);
  margin: 0 0 12px;
  word-break: break-word;
}

.page-contact .channel-use {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text);
  opacity: 0.82;
  margin: 0 0 12px;
}

.page-contact .channel-hint {
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted);
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid rgba(43, 227, 196, 0.1);
}

.page-contact .board-brief {
  border-radius: var(--radius-l);
  padding: 26px 22px;
  align-self: start;
}

.page-contact .board-brief .section-title {
  font-size: clamp(22px, 5vw, 28px);
  margin-bottom: 12px;
}

.page-contact .brief-intro {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  margin: 0;
}

.page-contact .mail-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 4px;
}

.page-contact .mail-list li {
  border-top: 1px solid rgba(43, 227, 196, 0.1);
}

.page-contact .mail-check {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  padding: 13px 0;
  cursor: pointer;
}

.page-contact .mail-check input {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--cyan-line);
  border-radius: 6px;
  background: transparent;
  cursor: pointer;
  transition: background-color 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .mail-check input:checked {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 3px var(--ink-1);
}

.page-contact .mail-check input:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .mail-check-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  opacity: 0.86;
}

.page-contact .mail-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--cyan);
  margin-bottom: 3px;
}

.page-contact .brief-tip {
  margin: 18px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  padding-left: 12px;
  border-left: 1px solid var(--yellow);
}

/* ---------- 回复节奏 ---------- */

.page-contact .contact-rhythm {
  margin-top: var(--pc-gap);
  display: grid;
  gap: 32px;
  align-items: center;
}

.page-contact .rhythm-copy .measure {
  max-width: 54ch;
  color: var(--muted);
  line-height: 1.8;
  margin: 0;
}

.page-contact .rhythm-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
}

.page-contact .rhythm-item {
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 15px 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .rhythm-time {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--yellow);
  padding-top: 3px;
}

.page-contact .rhythm-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
  opacity: 0.84;
}

.page-contact .rhythm-media .media-frame {
  border-radius: var(--radius-l);
  border: 1px solid var(--pc-line);
  overflow: hidden;
  background: var(--ink-1);
}

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

/* ---------- 常见事项 ---------- */

.page-contact .contact-matters {
  margin-top: var(--pc-gap);
}

.page-contact .matter-list {
  margin-top: 22px;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .matter {
  border-top: 1px solid var(--pc-line);
}

.page-contact .matter summary {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 0;
  cursor: pointer;
  list-style: none;
}

.page-contact .matter summary::-webkit-details-marker {
  display: none;
}

.page-contact .matter summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .matter[open] summary::after {
  content: "–";
}

.page-contact .matter summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-contact .matter-idx {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
  flex: 0 0 auto;
}

.page-contact .matter-title {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
}

.page-contact .matter[open] .matter-title {
  color: var(--cyan);
}

.page-contact .matter-body {
  padding: 0 0 22px 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .matter-body p {
  margin: 0 0 10px;
  max-width: 62ch;
}

.page-contact .matter-body p:last-child {
  margin-bottom: 0;
}

.page-contact .matter-body a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 运营所在地 ---------- */

.page-contact .contact-place {
  margin-top: var(--pc-gap);
  padding-bottom: 24px;
}

.page-contact .place-rule {
  height: 10px;
  margin-bottom: 22px;
  border-top: 1px solid var(--pc-line);
  background-image: repeating-linear-gradient(
    to right,
    var(--cyan-line) 0,
    var(--cyan-line) 1px,
    transparent 1px,
    transparent 14px
  );
  background-repeat: no-repeat;
  background-size: 100% 6px;
  opacity: 0.7;
}

.page-contact .place-title {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  font-weight: 500;
  color: var(--yellow);
  margin: 0 0 12px;
}

.page-contact .place-copy {
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 64ch;
  margin: 0 0 14px;
}

.page-contact .place-legal {
  font-size: 12px;
  letter-spacing: 0.05em;
  color: var(--muted);
  opacity: 0.75;
  margin: 0;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-contact {
    --pc-gap: 80px;
  }

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

  .page-contact .board-brief {
    padding: 32px 28px;
  }

  .page-contact .channel-use {
    font-size: 15.5px;
  }

  .page-contact .rhythm-item {
    grid-template-columns: 82px minmax(0, 1fr);
    gap: 22px;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.42fr) minmax(0, 0.58fr);
    gap: 52px;
  }

  .page-contact .contact-board {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: 40px;
    align-items: start;
  }

  .page-contact .contact-rhythm {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.74fr);
    gap: 56px;
  }

  .page-contact .matter summary {
    padding: 22px 0;
  }

  .page-contact .matter-body {
    padding-left: 46px;
    padding-bottom: 26px;
  }
}
</<PAGE_CSS>>>