.page-contact {
  --ct-gap: clamp(16px, 2.6vw, 28px);
  --ct-pad: clamp(18px, 3vw, 34px);
  background: var(--ink-800);
  color: var(--paper);
  font-family: var(--font-body);
  overflow-x: clip;
}

.page-contact .ct-h2 {
  font-family: var(--font-display);
  font-size: clamp(23px, 3.6vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 10px 0 0;
}

.page-contact .ct-head {
  max-width: 64ch;
  margin-bottom: clamp(22px, 3.4vw, 38px);
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line-blue);
}

.page-contact .ct-head__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .ct-block {
  padding: clamp(40px, 6vw, 84px) 0;
}

.page-contact .ct-block--deep {
  background: var(--ink-900);
  border-top: 1px solid var(--line-blue);
  border-bottom: 1px solid var(--line-blue);
}

.page-contact .ct-narrow {
  max-width: min(var(--container), 860px);
}

/* 首屏 */
.page-contact .ct-hero {
  position: relative;
  padding: calc(var(--header-h) + clamp(22px, 5vw, 52px)) 0 clamp(34px, 6vw, 72px);
  background-color: var(--ink-900);
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 42, 107, 0.9) 0 1px, transparent 1px 96px),
    repeating-linear-gradient(0deg, rgba(30, 42, 107, 0.9) 0 1px, transparent 1px 96px),
    radial-gradient(circle at 84% 4%, rgba(43, 227, 214, 0.18), transparent 58%);
}

.page-contact .ct-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--green) 60%, transparent);
  opacity: 0.75;
}

.page-contact .ct-hero__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 46px);
  align-items: center;
}

.page-contact .ct-hero .breadcrumb {
  margin-bottom: 20px;
}

.page-contact .ct-hero__title {
  font-family: var(--font-display);
  font-size: clamp(30px, 6.4vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 8px 0 16px;
}

.page-contact .ct-hero .lead {
  max-width: 36ch;
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.9;
  margin: 0;
}

.page-contact .ct-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .ct-hero__media {
  margin: 0;
  --ratio: 16 / 9;
  border: 1px solid var(--line-blue);
  box-shadow: 10px 10px 0 rgba(7, 11, 34, 0.65);
}

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

/* 渠道卡 */
.page-contact .ct-ch-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ct-gap);
}

.page-contact .ct-channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 22px 22px;
  background: var(--ink-700);
  border: 1px solid var(--line-blue);
  box-shadow: 6px 6px 0 rgba(7, 11, 34, 0.6);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.page-contact .ct-channel::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 3px;
  background: var(--cyan);
  transition: background 0.2s ease;
}

.page-contact .ct-channel:hover,
.page-contact .ct-channel:focus-within {
  border-color: var(--cyan);
}

.page-contact .ct-channel:hover::before,
.page-contact .ct-channel:focus-within::before {
  background: var(--gold);
}

.page-contact .ct-channel__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.page-contact .ct-channel__index {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-contact .ct-channel__icon {
  width: 26px;
  height: 26px;
  fill: none;
  stroke: var(--cyan);
  stroke-width: 1.6;
  stroke-linejoin: round;
  stroke-linecap: round;
}

.page-contact .ct-channel__title {
  font-family: var(--font-display);
  font-size: 20px;
  line-height: 1.3;
  color: var(--white);
  margin: 0;
}

.page-contact .ct-channel__value {
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.4;
  color: var(--cyan);
  overflow-wrap: anywhere;
  word-break: break-word;
  margin: 0;
}

.page-contact .ct-channel--wide .ct-channel__value {
  color: var(--green);
  font-size: clamp(20px, 3.4vw, 28px);
}

.page-contact .ct-channel__use {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  opacity: 0.86;
}

.page-contact .ct-channel__examples {
  list-style: none;
  margin: 4px 0 0;
  padding: 4px 0 4px 12px;
  border-left: 2px solid var(--line-blue);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.page-contact .ct-channel__examples li + li {
  margin-top: 4px;
}

.page-contact .ct-channel:hover .ct-channel__examples,
.page-contact .ct-channel:focus-within .ct-channel__examples {
  border-left-color: var(--gold);
  color: var(--paper);
}

/* 地址 */
.page-contact .ct-address {
  position: relative;
  margin: 0 0 26px;
  padding: var(--ct-pad);
  background-color: var(--ink-700);
  background-image:
    repeating-linear-gradient(90deg, rgba(30, 42, 107, 0.55) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(0deg, rgba(30, 42, 107, 0.55) 0 1px, transparent 1px 24px);
  border: 1px solid var(--line-blue);
}

.page-contact .ct-address::before,
.page-contact .ct-address::after {
  content: "";
  position: absolute;
  width: 10px;
  height: 10px;
  border: 1px solid var(--cyan);
}

.page-contact .ct-address::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-contact .ct-address::after {
  right: -1px;
  bottom: -1px;
  border-left: 0;
  border-top: 0;
}

.page-contact .ct-address__coord {
  display: block;
  margin-bottom: 14px;
  color: var(--gold);
}

.page-contact .ct-address__line {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(19px, 3.2vw, 27px);
  line-height: 1.5;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .ct-address__meta {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .ct-visit-notes {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .ct-visit-notes li {
  font-size: 14px;
  line-height: 1.8;
  color: var(--paper);
  opacity: 0.9;
  padding-left: 14px;
  border-left: 1px solid var(--line-blue);
}

.page-contact .ct-visit-notes__k {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cyan);
}

/* 准备清单 */
.page-contact .ct-check {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-contact .ct-check__item {
  position: relative;
}

.page-contact .ct-check__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .ct-check__label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px 16px 16px 14px;
  background: var(--ink-700);
  border: 1px solid var(--line-blue);
  cursor: pointer;
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-contact .ct-check__label:hover {
  border-color: var(--cyan);
}

.page-contact .ct-check__box {
  position: relative;
  flex: 0 0 18px;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--mist);
  transition: border-color 0.18s ease, background 0.18s ease;
}

.page-contact .ct-check__box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--ink-900);
  border-bottom: 2px solid var(--ink-900);
  transform: rotate(40deg) scale(0.4);
  opacity: 0;
  transition: transform 0.16s ease, opacity 0.16s ease;
}

.page-contact .ct-check__input:checked + .ct-check__label .ct-check__box {
  background: var(--green);
  border-color: var(--green);
}

.page-contact .ct-check__input:checked + .ct-check__label .ct-check__box::after {
  opacity: 1;
  transform: rotate(40deg) scale(1);
}

.page-contact .ct-check__input:checked + .ct-check__label .ct-check__text {
  color: var(--mist);
}

.page-contact .ct-check__input:focus-visible + .ct-check__label {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .ct-check__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  transition: color 0.18s ease;
}

.page-contact .ct-check__text strong {
  display: inline;
  font-weight: 700;
  color: var(--white);
}

/* 数据协作 */
.page-contact .ct-collab {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-contact .ct-collab__copy .prose {
  margin: 18px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.9;
  max-width: 40ch;
}

.page-contact .ct-inline-num {
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--green);
}

.page-contact .ct-collab__list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .ct-collab__list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--paper);
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line-blue);
}

.page-contact .ct-collab__foot {
  margin: 20px 0 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .ct-collab__foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 227, 214, 0.45);
}

.page-contact .ct-collab__foot a:hover {
  border-bottom-color: var(--gold);
  color: var(--gold);
}

.page-contact .ct-collab__media {
  margin: 0;
  --ratio: 10 / 7;
  border: 1px solid var(--line-blue);
  box-shadow: -8px 8px 0 rgba(7, 11, 34, 0.6);
}

/* 高原与响应 */
.page-contact .ct-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--ct-gap);
}

.page-contact .ct-panel {
  padding: var(--ct-pad);
  background: var(--ink-700);
  border: 1px solid var(--line-blue);
}

.page-contact .ct-panel--signal {
  border-left: 3px solid var(--gold);
}

.page-contact .ct-panel--response {
  border-left: 3px solid var(--cyan);
}

.page-contact .ct-panel .prose {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--paper);
  opacity: 0.9;
  max-width: 38ch;
}

.page-contact .ct-subject {
  margin-top: 22px;
  padding: 16px 16px 18px;
  background: var(--ink-900);
  border: 1px solid var(--line-blue);
}

.page-contact .ct-subject__label {
  display: block;
  margin-bottom: 10px;
  color: var(--gold);
}

.page-contact .ct-subject__sample {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(13px, 1.9vw, 15px);
  line-height: 1.7;
  color: var(--green);
  overflow-wrap: anywhere;
}

.page-contact .ct-subject__ex {
  margin: 10px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-contact .ct-panel__note {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .ct-steps {
  list-style: none;
  counter-reset: step;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .ct-steps__item {
  display: flex;
  gap: 14px;
  padding-left: 2px;
}

.page-contact .ct-steps__num {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--cyan);
  padding-top: 2px;
}

.page-contact .ct-steps__title {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
}

.page-contact .ct-steps__text {
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--mist);
}

/* 收尾 */
.page-contact .ct-closing {
  padding: clamp(38px, 5vw, 72px) 0 clamp(30px, 4vw, 56px);
  background: var(--ink-900);
  border-top: 1px solid var(--line-blue);
}

.page-contact .ct-closing__head {
  max-width: 56ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .ct-closing .ct-head__note {
  margin-top: 12px;
}

.page-contact .ct-links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-blue);
  border: 1px solid var(--line-blue);
}

.page-contact .ct-links__item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px 18px 20px;
  background: var(--ink-800);
  transition: background 0.18s ease;
}

.page-contact .ct-links__item:hover {
  background: var(--ink-700);
}

.page-contact .ct-links__a {
  font-family: var(--font-display);
  font-size: 17px;
  color: var(--cyan);
  text-decoration: none;
  align-self: flex-start;
  border-bottom: 1px solid rgba(43, 227, 214, 0.4);
}

.page-contact .ct-links__item:hover .ct-links__a {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-contact .ct-links__d {
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .ct-legal {
  margin: 26px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

@media (min-width: 720px) {
  .page-contact .ct-ch-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .ct-channel--wide {
    grid-column: span 2;
  }

  .page-contact .ct-check {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

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

@media (min-width: 960px) {
  .page-contact .ct-hero__inner {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-contact .ct-collab {
    grid-template-columns: 1.05fr 0.95fr;
  }

  .page-contact .ct-split {
    grid-template-columns: 1.02fr 0.98fr;
  }
}

@media (min-width: 1080px) {
  .page-contact .ct-ch-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .ct-channel--wide {
    grid-column: auto;
  }

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

  .page-contact .ct-collab__media {
    margin-top: 6px;
  }
}