.page-contact {
  --contact-mono: ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
}

.page-contact .contact-head {
  padding: 20px 0 44px;
}

.page-contact .contact-head h1 {
  margin: 8px 0 18px;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(40px, 9vw, 88px);
  line-height: 0.95;
  letter-spacing: -0.03em;
  color: var(--text-1);
  text-transform: uppercase;
}

.page-contact .contact-head .lede {
  max-width: 34em;
  color: var(--text-2);
}

/* ---------- 01 渠道选择 ---------- */

.page-contact .contact-channels__head {
  display: grid;
  gap: 24px;
}

.page-contact .contact-channels__visual {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

.page-contact .channels {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 30px;
}

.page-contact .channel {
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--glass);
  transition: border-color 0.25s var(--ease), background 0.25s var(--ease), transform 0.25s var(--ease);
}

.page-contact .channel:hover {
  border-color: var(--cyan-400);
  transform: translateY(-2px);
}

.page-contact .channel:focus-within {
  border-color: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(111, 227, 176, 0.16);
}

.page-contact .channel[open] {
  background: var(--ink-700);
  border-color: var(--green-500);
}

.page-contact .channel__summary {
  list-style: none;
  display: grid;
  grid-template-columns: 30px 1fr;
  grid-template-areas:
    "idx label"
    "idx hint";
  gap: 3px 12px;
  padding: 18px 18px 18px 16px;
  cursor: pointer;
  outline: none;
}

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

.page-contact .channel__idx {
  grid-area: idx;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 800;
  line-height: 1.25;
  color: var(--green-500);
  transition: color 0.25s var(--ease);
}

.page-contact .channel[open] .channel__idx {
  color: var(--cyan-400);
}

.page-contact .channel__label {
  grid-area: label;
  font-size: var(--fs-18);
  font-weight: 700;
  line-height: 1.35;
  color: var(--text-1);
}

.page-contact .channel__hint {
  grid-area: hint;
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--text-3);
}

.page-contact .channel__body {
  padding: 2px 18px 20px 58px;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-2);
}

.page-contact .channel__body p + p {
  margin-top: 10px;
}

.page-contact .channel__body a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 02 / 03 邮箱与电话 ---------- */

.page-contact .contact-split {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.page-contact .contact-panel {
  padding: 22px 22px 24px;
}

.page-contact .contact-panel__kicker {
  margin: 0 0 10px;
  font-size: var(--fs-12);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
}

.page-contact .contact-panel__value {
  margin: 0 0 12px;
  font-family: var(--contact-mono);
  font-size: clamp(17px, 4.6vw, 23px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text-1);
  word-break: break-all;
}

.page-contact .contact-panel__value--lg {
  font-size: clamp(30px, 7.5vw, 46px);
  letter-spacing: 0.02em;
  font-variant-numeric: tabular-nums;
  color: var(--red-500);
}

.page-contact .contact-panel__note {
  margin: 0;
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-2);
}

.page-contact .mail-tips {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .mail-tips li {
  position: relative;
  padding-left: 18px;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--text-2);
}

.page-contact .mail-tips li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.62em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan-400);
}

.page-contact .contact-call {
  margin-top: 26px;
  padding: 26px 22px 28px;
  border-left: 3px solid var(--red-500);
}

/* ---------- 04 地址 ---------- */

.page-contact .address-slip {
  margin-top: 24px;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .address-slip__value {
  margin: 0;
  font-size: var(--fs-18);
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--text-1);
}

.page-contact .address-slip__note {
  margin: 10px 0 0;
  font-size: var(--fs-14);
  line-height: 1.7;
  color: var(--text-3);
}

/* ---------- 05 数据反馈清单 ---------- */

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

.page-contact .brief-list__item {
  display: grid;
  grid-template-columns: 38px 1fr;
  gap: 3px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .brief-list__item:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-contact .brief-list__n {
  grid-row: 1 / span 2;
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 800;
  line-height: 1.15;
  color: var(--green-500);
}

.page-contact .brief-list__label {
  font-size: var(--fs-16);
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-1);
}

.page-contact .brief-list__desc {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-2);
}

/* ---------- 06 回复节奏 ---------- */

.page-contact .reply-rows {
  list-style: none;
  margin: 26px 0 0;
  padding: 0 0 0 20px;
  border-left: 1px solid var(--line);
}

.page-contact .reply-row {
  position: relative;
  display: grid;
  gap: 6px;
  padding: 15px 0;
}

.page-contact .reply-row::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 22px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink-600);
}

.page-contact .reply-row:first-child::before {
  background: var(--cyan-400);
  box-shadow: 0 0 0 4px rgba(111, 227, 176, 0.16);
}

.page-contact .reply-row__label {
  font-size: var(--fs-16);
  font-weight: 700;
  color: var(--text-1);
}

.page-contact .reply-row__text {
  font-size: var(--fs-14);
  line-height: 1.75;
  color: var(--text-2);
  max-width: 46em;
}

.page-contact .contact-reply__visual {
  margin: 34px 0 0;
  border: 1px solid var(--line);
  border-radius: 6px;
  overflow: hidden;
}

/* ---------- 页末联系档案 ---------- */

.page-contact .contact-record-wrap {
  margin: 56px 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-record__title {
  margin: 0 0 14px;
  font-size: var(--fs-14);
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-3);
}

.page-contact .contact-record {
  display: grid;
  gap: 0;
}

.page-contact .contact-record__row {
  display: grid;
  grid-template-columns: 84px 1fr;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .contact-record__k {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--text-3);
}

.page-contact .contact-record__v {
  font-family: var(--contact-mono);
  font-size: var(--fs-14);
  line-height: 1.6;
  color: var(--text-2);
  word-break: break-all;
}

.page-contact .contact-record__v--text {
  font-family: var(--font-body);
  letter-spacing: 0.01em;
  color: var(--text-1);
}

.page-contact .contact-record__note {
  margin: 18px 0 0;
  font-size: var(--fs-14);
  line-height: 1.8;
  color: var(--text-3);
  max-width: 52em;
}

.page-contact .contact-record__note a {
  color: var(--cyan-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 响应式 ---------- */

@media (min-width: 700px) {
  .page-contact .contact-head {
    padding: 28px 0 56px;
  }

  .page-contact .contact-channels__head {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.72fr);
    align-items: end;
    gap: 40px;
  }

  .page-contact .contact-split {
    grid-template-columns: 1fr 1fr;
    gap: 22px;
  }

  .page-contact .contact-panel {
    padding: 26px 26px 28px;
  }

  .page-contact .contact-call {
    padding: 30px 30px 32px;
  }

  .page-contact .contact-record {
    grid-template-columns: 1fr 1fr;
    column-gap: 44px;
  }

  .page-contact .contact-record__row--wide {
    grid-column: 1 / -1;
  }

  .page-contact .brief-list__item {
    grid-template-columns: 44px 200px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 16px;
    padding: 20px 0;
  }

  .page-contact .brief-list__n {
    grid-row: auto;
  }

  .page-contact .brief-list__label {
    grid-column: 2;
  }

  .page-contact .brief-list__desc {
    grid-column: 3;
  }

  .page-contact .reply-row {
    grid-template-columns: 170px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 22px;
    padding: 18px 0;
  }

  .page-contact .reply-row::before {
    top: 26px;
  }
}

@media (min-width: 960px) {
  .page-contact .channels {
    flex-direction: row;
    align-items: flex-start;
    gap: 14px;
    margin-top: 36px;
  }

  .page-contact .channel {
    flex: 1 1 0;
    min-width: 0;
    transition: flex 0.4s var(--ease), border-color 0.25s var(--ease),
      background 0.25s var(--ease), transform 0.25s var(--ease);
  }

  .page-contact .channel[open] {
    flex: 1.9 1 0;
  }

  .page-contact .channel:not([open]):hover {
    flex: 1.18 1 0;
  }

  .page-contact .channel__summary {
    padding: 22px 22px 22px 20px;
  }

  .page-contact .channel__body {
    padding: 4px 24px 24px 66px;
  }

  .page-contact .contact-record {
    column-gap: 56px;
  }
}