.page-contact {
  --ct-line: 1px solid var(--rule);
  --ct-gap: 16px;
  padding-bottom: 4px;
}

.page-contact .ct-top {
  padding: 22px 0 4px;
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  display: grid;
  gap: 18px;
  padding: 6px 0 40px;
}

.page-contact .ct-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-size: clamp(1.9rem, 8.6vw, 3.5rem);
  font-weight: 800;
  line-height: 1.04;
  letter-spacing: -0.025em;
  color: var(--paper);
}

.page-contact .ct-hero__body {
  display: grid;
  gap: 20px;
}

.page-contact .ct-hero__lede {
  margin: 0;
  max-width: 48ch;
}

.page-contact .ct-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 0;
  background: var(--rule);
  border: var(--ct-line);
}

.page-contact .ct-hero__facts > div {
  display: grid;
  gap: 6px;
  align-content: start;
  padding: 12px 12px 14px;
  background: var(--ink);
}

.page-contact .ct-hero__facts dt {
  margin: 0;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: var(--steel);
}

.page-contact .ct-hero__facts dd {
  margin: 0;
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--cyan);
}

.page-contact .ct-ticks {
  height: 11px;
  border-top: var(--ct-line);
  border-bottom: var(--ct-line);
  background-image: repeating-linear-gradient(90deg, var(--rule) 0 1px, transparent 1px 16px);
  background-repeat: repeat;
  background-size: auto 5px;
  background-position: left bottom;
}

/* ---------- 通用区块标题 ---------- */
.page-contact .ct-head {
  display: grid;
  gap: 10px;
  max-width: 60ch;
  margin-bottom: 26px;
}

.page-contact .ct-head h2 {
  margin: 0;
  font-size: clamp(1.4rem, 5.8vw, 2.1rem);
  font-weight: 750;
  line-height: 1.16;
  letter-spacing: -0.015em;
  color: var(--paper);
}

.page-contact .ct-head__note {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 分流 ---------- */
.page-contact .ct-flow {
  padding-top: 40px;
  padding-bottom: 44px;
}

.page-contact .ct-flow__grid {
  display: grid;
  gap: 12px;
}

.page-contact .ct-quad {
  position: relative;
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 20px 18px 18px 22px;
  background: var(--board);
  border: var(--ct-line);
  transition: background 0.25s ease, border-color 0.25s ease, transform 0.25s ease;
}

.page-contact .ct-quad::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 3px;
  background: var(--cyan);
  opacity: 0.55;
  transition: opacity 0.25s ease;
}

.page-contact .ct-quad--human::before {
  background: var(--amber);
}

.page-contact .ct-quad:hover,
.page-contact .ct-quad:focus-within {
  background: var(--hold);
  border-color: rgba(34, 225, 255, 0.45);
  transform: translateY(-2px);
}

.page-contact .ct-quad--human:hover,
.page-contact .ct-quad--human:focus-within {
  border-color: rgba(255, 164, 28, 0.5);
}

.page-contact .ct-quad:hover::before,
.page-contact .ct-quad:focus-within::before {
  opacity: 1;
}

.page-contact .ct-quad__no {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--steel);
}

.page-contact .ct-quad h3 {
  margin: 0;
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .ct-quad p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.62;
  color: var(--steel);
}

.page-contact .ct-quad p.ct-quad__path {
  padding-top: 9px;
  border-top: 1px dashed var(--rule);
  font-size: 0.85rem;
  color: var(--paper);
}

.page-contact .ct-quad__link {
  justify-self: start;
  padding-bottom: 2px;
  font-size: 0.86rem;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 225, 255, 0.4);
}

.page-contact .ct-quad__link:hover,
.page-contact .ct-quad__link:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-contact .ct-flow__figure {
  margin: 26px 0 0;
}

/* ---------- 人工通道 ---------- */
.page-contact .ct-channels {
  padding-top: 46px;
  padding-bottom: 46px;
}

.page-contact .ct-channels__intro {
  display: grid;
  gap: 18px;
  margin-bottom: 30px;
}

.page-contact .ct-channels__figure {
  margin: 0;
}

.page-contact .ct-channels__lead p {
  margin: 0 0 12px;
  font-size: 0.95rem;
  line-height: 1.72;
  color: var(--steel);
}

.page-contact .ct-channels__lead p:last-child {
  margin-bottom: 0;
}

.page-contact .ct-channel-list {
  display: grid;
  gap: var(--ct-gap);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-channel {
  display: grid;
  gap: 14px;
  padding: 22px 20px;
  background: var(--hold);
  border: var(--ct-line);
  border-left: 3px solid var(--cyan);
  box-shadow: var(--shadow-stack);
}

.page-contact .ct-channel__head {
  display: grid;
  gap: 6px;
  align-content: start;
}

.page-contact .ct-channel__no {
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .ct-channel h3 {
  margin: 0;
  font-size: 1.06rem;
  font-weight: 700;
  color: var(--paper);
}

.page-contact .ct-channel__body {
  display: grid;
  gap: 12px;
  align-content: start;
  min-width: 0;
}

.page-contact .ct-copyline {
  margin: 0;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: clamp(1rem, 4.6vw, 1.3rem);
  letter-spacing: 0.01em;
  line-height: 1.4;
  color: var(--paper);
  word-break: break-all;
  user-select: all;
  border-bottom: 1px solid var(--rule);
}

.page-contact .ct-copyline--text {
  font-family: var(--font-sans);
  font-size: clamp(0.98rem, 3.6vw, 1.08rem);
  line-height: 1.65;
  letter-spacing: 0;
  word-break: normal;
  overflow-wrap: anywhere;
}

.page-contact .ct-channel__desc {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.65;
  color: var(--steel);
}

/* ---------- 用途边界 ---------- */
.page-contact .ct-scope {
  padding-top: 46px;
  padding-bottom: 46px;
}

.page-contact .ct-scope__grid {
  display: grid;
  gap: 14px;
}

.page-contact .ct-scope__card {
  display: grid;
  gap: 10px;
  align-content: start;
  padding: 20px 18px;
}

.page-contact .ct-scope__card p {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.68;
  color: var(--steel);
}

.page-contact .ct-scope__guard {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--rule);
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 联系前准备 ---------- */
.page-contact .ct-prep {
  padding-top: 46px;
  padding-bottom: 46px;
}

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

.page-contact .ct-check {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  background: var(--board);
  border: var(--ct-line);
  transition: border-color 0.2s ease;
}

.page-contact .ct-check:hover {
  border-color: rgba(34, 225, 255, 0.35);
}

.page-contact .ct-check input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  display: inline-block;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  background: var(--ink);
  border: 1px solid var(--steel);
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, box-shadow 0.15s ease;
}

.page-contact .ct-check input[type="checkbox"]:checked {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 4px var(--board);
}

.page-contact .ct-check input[type="checkbox"]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .ct-check label {
  display: grid;
  gap: 5px;
  font-size: 0.92rem;
  line-height: 1.62;
  color: var(--steel);
  cursor: pointer;
}

.page-contact .ct-check__title {
  font-size: 0.98rem;
  font-weight: 650;
  letter-spacing: 0.01em;
  color: var(--paper);
}

/* ---------- 备案与入口 ---------- */
.page-contact .ct-record {
  padding-top: 44px;
  padding-bottom: 56px;
  border-top: var(--ct-line);
}

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

.page-contact .ct-record__list .data-list__row > dt,
.page-contact .ct-record__list .data-list__row > dd {
  margin: 0;
}

.page-contact .ct-record__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .ct-flow__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .ct-channel {
    grid-template-columns: 170px minmax(0, 1fr);
    column-gap: 26px;
    padding: 26px 28px;
  }

  .page-contact .ct-channel__head {
    padding-right: 18px;
    border-right: 1px dashed var(--rule);
  }

  .page-contact .ct-channel__body {
    gap: 14px;
  }

  .page-contact .ct-flow {
    padding-top: 52px;
    padding-bottom: 56px;
  }
}

@media (min-width: 860px) {
  .page-contact .ct-channels__intro {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: 28px;
    align-items: center;
  }

  .page-contact .ct-scope__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .ct-hero {
    padding-bottom: 52px;
  }
}
<<<END>>>