.page-contact {
  --ct-block: clamp(34px, 6vw, 74px);
  --ct-radius: 2px;
  background: var(--ink-900);
  color: var(--text-hi);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-contact .ct-link {
  color: var(--teal);
  text-decoration: none;
  border-bottom: 1px solid var(--teal-a32);
  transition: border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-contact .ct-link:hover,
.page-contact .ct-link:focus-visible {
  border-bottom-color: var(--teal);
  color: var(--text-hi);
}
.page-contact .ct-link:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

/* 首屏 */
.page-contact .ct-hero {
  padding: clamp(20px, 4vw, 44px) 0 clamp(26px, 4vw, 52px);
  border-bottom: 1px solid var(--hairline);
}
.page-contact .ct-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--teal);
}
.page-contact .ct-hero__title {
  margin: 16px 0 0;
  font-family: var(--font-display);
  font-weight: 250;
  font-size: clamp(31px, 7vw, 66px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 13em;
}
.page-contact .ct-hero__lede {
  margin: 20px 0 0;
  max-width: 38em;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--text-mid);
}

.page-contact .ct-index {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  margin: 26px 0 0;
  padding: 0;
}
.page-contact .ct-index a {
  display: inline-block;
  padding-bottom: 3px;
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--text-mid);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .ct-index a:hover,
.page-contact .ct-index a:focus-visible {
  color: var(--text-hi);
  border-bottom-color: var(--teal);
}
.page-contact .ct-index a:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 3px;
}

/* 章节通用 */
.page-contact .ct-section {
  padding: var(--ct-block) 0;
  border-bottom: 1px solid var(--hairline);
}
.page-contact .ct-section:last-of-type {
  border-bottom: 0;
}

.page-contact .ct-head {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.page-contact .ct-head__no {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--teal);
}
.page-contact .ct-head__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(21px, 3.2vw, 32px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  max-width: 22em;
}
.page-contact .ct-head__aside {
  margin: 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--text-mid);
}

@media (min-width: 820px) {
  .page-contact .ct-head {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    gap: 32px;
  }
  .page-contact .ct-head__aside {
    text-align: right;
    flex: 0 0 auto;
    padding-bottom: 4px;
  }
}

/* 图片 */
.page-contact .ct-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
}
.page-contact .ct-figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
  background: var(--ink-800);
  border: 1px solid var(--hairline);
  border-radius: var(--ct-radius);
}
.page-contact .ct-figure figcaption {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--text-mid);
}

/* 三条渠道 */
.page-contact .ct-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 26px;
  margin-top: clamp(24px, 3.4vw, 38px);
}
.page-contact .ct-channel {
  padding-left: 16px;
  border-left: 1px solid var(--hairline);
  transition: opacity var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .ct-channel__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--text-mid);
}
.page-contact .ct-channel__title {
  margin: 8px 0 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--text-hi);
}
.page-contact .ct-channel__value {
  display: inline-block;
  margin: 12px 0 0;
  padding: 7px 10px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.55;
  color: var(--text-hi);
  background: var(--paper-a06);
  border: 1px solid var(--hairline);
  border-radius: var(--ct-radius);
  overflow-wrap: anywhere;
}
.page-contact .ct-channel__use {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-hi);
}
.page-contact .ct-channel__limit {
  margin: 8px 0 0;
  font-size: 13px;
  line-height: 1.72;
  color: var(--text-mid);
}

@media (min-width: 880px) {
  .page-contact .ct-channels {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }
  .page-contact .ct-channel {
    padding: 0 clamp(18px, 2.4vw, 32px);
  }
  .page-contact .ct-channel:first-child {
    padding-left: 0;
    border-left: 0;
  }
  .page-contact .ct-channel:last-child {
    padding-right: 0;
  }
}

@media (hover: hover) and (min-width: 880px) {
  .page-contact .ct-channels:hover .ct-channel {
    opacity: 0.7;
  }
  .page-contact .ct-channels:hover .ct-channel:hover {
    opacity: 1;
    border-left-color: var(--teal-a32);
  }
}

/* 边界警示 */
.page-contact .ct-warn {
  margin-top: clamp(22px, 3vw, 32px);
  padding: clamp(20px, 3vw, 34px);
  background: var(--amber-a08);
  border: 1px solid var(--amber-a28);
  border-radius: var(--ct-radius);
}
.page-contact .ct-warn__lead {
  margin: 0;
  max-width: 40em;
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--text-hi);
}
.page-contact .ct-warn__sample {
  display: inline-block;
  margin: 18px 0 0;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.04em;
  color: var(--amber);
  background: var(--paper-a06);
  border: 1px dashed var(--amber-a48);
  border-radius: var(--ct-radius);
}
.page-contact .ct-warn__list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}
.page-contact .ct-warn__list li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-mid);
}
.page-contact .ct-warn__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.82em;
  width: 8px;
  height: 1px;
  background: var(--amber-deep);
}

/* 说明卡 */
.page-contact .ct-card {
  margin-top: clamp(22px, 3vw, 34px);
  padding: clamp(20px, 3vw, 36px);
  background: var(--ink-800);
  border: 1px solid var(--hairline);
  border-radius: var(--ct-radius);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.page-contact .ct-card:hover {
  border-color: var(--teal-a32);
  box-shadow: var(--shadow-hover);
}
.page-contact .ct-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 17px;
  letter-spacing: 0.01em;
  color: var(--text-hi);
}
.page-contact .ct-card__note {
  margin: 20px 0 0;
  max-width: 40em;
  padding-top: 18px;
  border-top: 1px solid var(--hairline);
  font-size: 14px;
  line-height: 1.8;
  color: var(--text-mid);
}

.page-contact .ct-steps {
  list-style: none;
  counter-reset: ct;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-contact .ct-steps li {
  position: relative;
  counter-increment: ct;
  padding-left: 46px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-hi);
}
.page-contact .ct-steps li::before {
  content: counter(ct, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 3px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--teal);
}

.page-contact .ct-pairs {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}
.page-contact .ct-pair__key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--teal);
}
.page-contact .ct-pair__val {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--text-hi);
}

@media (min-width: 760px) {
  .page-contact .ct-pairs {
    grid-template-columns: 1fr 1fr;
    gap: 22px 34px;
    margin-top: 26px;
  }
}

/* 收尾 */
.page-contact .ct-end {
  display: grid;
  gap: clamp(24px, 3.4vw, 40px);
}
.page-contact .ct-end__text {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-mid);
}
.page-contact .ct-entries {
  display: grid;
  gap: 14px;
  margin-top: 22px;
}
.page-contact .ct-entry {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 18px;
  text-decoration: none;
  border: 1px solid var(--teal-a32);
  border-radius: var(--ct-radius);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .ct-entry:hover {
  background: var(--teal-a08);
  border-color: var(--teal-a56);
}
.page-contact .ct-entry:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}
.page-contact .ct-entry__label {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-hi);
}
.page-contact .ct-entry__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-mid);
}
.page-contact .ct-entry--legacy {
  border-color: var(--violet-a50);
}
.page-contact .ct-entry--legacy:hover {
  background: var(--violet-a28);
  border-color: var(--violet-legacy);
}
.page-contact .ct-entry--legacy .ct-entry__label {
  color: var(--text-mid);
}

.page-contact .ct-figure--end {
  margin-top: 0;
}

.page-contact .ct-icp {
  margin: clamp(26px, 3.4vw, 40px) 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--text-mid);
}

@media (min-width: 900px) {
  .page-contact .ct-end {
    grid-template-columns: 1.08fr 0.92fr;
    align-items: start;
    gap: clamp(30px, 4.5vw, 60px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-index a,
  .page-contact .ct-link,
  .page-contact .ct-channel,
  .page-contact .ct-card,
  .page-contact .ct-entry {
    transition-duration: 0.01ms;
  }
}