.page-contact {
  --ct-card: #0A1E2F;
  --ct-soft: rgba(233, 238, 243, .78);
  display: block;
  background-color: var(--night);
  color: var(--ice);
  overflow-x: hidden;
}

/* ---------- Hero ---------- */
.page-contact .ct-hero {
  position: relative;
  overflow: hidden;
  padding: 56px 0 44px;
  background-color: var(--night);
  border-bottom: 2px solid var(--line);
}

.page-contact .ct-hero__bg {
  position: absolute;
  inset: 0;
}

.page-contact .ct-hero__bg img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  object-position: 72% 50%;
  opacity: .3;
}

.page-contact .ct-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(620px 320px at 10% 4%, rgba(255, 106, 26, .22), transparent 62%),
    linear-gradient(96deg, var(--night) 4%, rgba(7, 21, 34, .88) 46%, rgba(7, 21, 34, .42) 100%);
}

.page-contact .ct-hero__inner {
  position: relative;
  z-index: 2;
}

.page-contact .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--slate);
}

.page-contact .breadcrumbs a {
  color: var(--slate);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .25s ease, border-color .25s ease;
}

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

.page-contact .ct-hero__title {
  margin: 16px 0 0;
  max-width: 20em;
  font-size: clamp(30px, 6vw, 52px);
  line-height: 1.14;
  letter-spacing: -.02em;
  font-weight: 800;
  color: var(--ice);
}

.page-contact .ct-hero__lede {
  margin-top: 18px;
  max-width: 640px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ct-soft);
}

.page-contact .ct-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .ct-hero__facts {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin: 36px 0 0;
  padding: 0;
  max-width: 760px;
  background-color: var(--line);
  border: 2px solid var(--line);
}

.page-contact .ct-hero__facts > div {
  background-color: rgba(4, 9, 16, .78);
  padding: 14px 16px;
}

.page-contact .ct-hero__facts dt {
  font-size: 12.5px;
  letter-spacing: .07em;
  color: var(--slate);
}

.page-contact .ct-hero__facts dd {
  margin: 6px 0 0;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

/* ---------- 帮助台引导条 ---------- */
.page-contact .ct-nudge {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 20px;
  align-items: end;
  padding: 24px 22px;
  border: 2px solid var(--line);
  border-left: 6px solid var(--orange);
  background: linear-gradient(122deg, rgba(14, 59, 46, .92), rgba(7, 21, 34, .92));
  box-shadow: 8px 8px 0 rgba(4, 9, 16, .65);
}

.page-contact .ct-nudge__title {
  margin: 8px 0 10px;
  font-size: clamp(20px, 3.4vw, 27px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .ct-nudge__text p {
  font-size: 16px;
  line-height: 1.78;
  color: var(--ct-soft);
}

.page-contact .ct-nudge__text a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1.5px;
}

.page-contact .ct-nudge__text a:hover,
.page-contact .ct-nudge__text a:focus-visible {
  color: var(--orange);
}

.page-contact .ct-nudge__note {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid rgba(233, 238, 243, .2);
  font-size: 14px;
  line-height: 1.75;
  color: var(--slate);
}

/* ---------- 渠道 + 清单 ---------- */
.page-contact .ct-split__heading {
  margin-top: 52px;
}

.page-contact .ct-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 22px;
  align-items: start;
  margin-top: 26px;
}

.page-contact .ct-channels {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-contact .ct-channel {
  border: 2px solid var(--line);
  background-color: var(--ct-card);
  box-shadow: 8px 8px 0 rgba(4, 9, 16, .6);
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}

.page-contact .ct-channel[open] {
  border-color: rgba(255, 106, 26, .5);
}

.page-contact .ct-channel:hover {
  transform: translateY(-4px);
  box-shadow: 10px 12px 0 rgba(4, 9, 16, .72);
}

.page-contact .ct-channel__sum {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .ct-channel__sum:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -3px;
}

.page-contact .ct-channel__icon {
  flex: 0 0 auto;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1.5px solid rgba(255, 106, 26, .5);
  border-radius: 3px;
  background-color: rgba(255, 106, 26, .13);
  color: var(--orange);
}

.page-contact .ct-channel__label {
  display: flex;
  flex-direction: column;
  gap: 5px;
  min-width: 0;
}

.page-contact .ct-channel__name {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .ct-channel__hint {
  font-size: 13.5px;
  line-height: 1.5;
  color: var(--slate);
}

.page-contact .ct-channel__value {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cyan);
  word-break: break-all;
  user-select: all;
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-channel__chev {
  flex: 0 0 auto;
  margin-left: auto;
  width: 10px;
  height: 10px;
  border-right: 2px solid var(--slate);
  border-bottom: 2px solid var(--slate);
  transform: rotate(45deg);
  transition: transform .3s ease, border-color .3s ease;
}

.page-contact .ct-channel[open] .ct-channel__chev {
  transform: rotate(-135deg);
  border-color: var(--orange);
}

.page-contact .ct-channel__body {
  padding: 16px 18px 20px;
  border-top: 1.5px solid var(--line);
}

.page-contact .ct-channel__body p {
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ct-soft);
}

.page-contact .ct-channel__list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 9px;
}

.page-contact .ct-channel__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.68;
  color: rgba(233, 238, 243, .9);
}

.page-contact .ct-channel__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: .68em;
  width: 8px;
  height: 2px;
  background-color: var(--orange);
}

.page-contact .ct-channel__body p.ct-channel__foot {
  margin-top: 16px;
  padding-left: 12px;
  border-left: 2px solid var(--line);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--slate);
}

/* ---------- 侧栏清单 ---------- */
.page-contact .ct-side {
  display: flex;
  flex-direction: column;
  gap: 22px;
}

.page-contact .ct-checklist {
  padding: 24px 20px 22px;
  border: 2px solid var(--line);
  background-color: var(--pitch);
  background-image:
    linear-gradient(rgba(233, 238, 243, .055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(233, 238, 243, .055) 1px, transparent 1px);
  background-size: 26px 26px, 26px 26px;
  box-shadow: 8px 8px 0 rgba(4, 9, 16, .6);
}

.page-contact .ct-checklist__title {
  margin: 8px 0 8px;
  font-size: clamp(20px, 3vw, 23px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .ct-checklist__sub {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: rgba(233, 238, 243, .7);
}

.page-contact .ct-checklist__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  border-top: 1.5px solid rgba(233, 238, 243, .14);
}

.page-contact .ct-checklist__list li {
  border-bottom: 1.5px solid rgba(233, 238, 243, .14);
}

.page-contact .ct-check {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 2px;
  cursor: pointer;
}

.page-contact .ct-check__box {
  flex: 0 0 auto;
  position: relative;
  width: 18px;
  height: 18px;
  margin: 2px 0 0;
  appearance: none;
  -webkit-appearance: none;
  border: 1.5px solid var(--slate);
  border-radius: 2px;
  background-color: transparent;
  cursor: pointer;
  transition: background-color .2s ease, border-color .2s ease;
}

.page-contact .ct-check__box:checked {
  background-color: var(--orange);
  border-color: var(--orange);
}

.page-contact .ct-check__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--night);
  border-bottom: 2px solid var(--night);
  transform: rotate(42deg);
}

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

.page-contact .ct-check__no {
  flex: 0 0 auto;
  padding-top: 3px;
  font-size: 12.5px;
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-check__txt {
  font-size: 15px;
  line-height: 1.68;
  color: rgba(233, 238, 243, .9);
}

.page-contact .ct-check__box:checked ~ .ct-check__txt {
  color: var(--slate);
  text-decoration: line-through;
  text-decoration-color: rgba(147, 163, 177, .65);
}

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

/* ---------- 响应节奏 ---------- */
.page-contact .ct-flow {
  background-color: var(--night-deep);
  border-top: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
}

.page-contact .ct-flow__head {
  max-width: 640px;
}

.page-contact .ct-flow__lede {
  margin-top: 14px;
  font-size: 16.5px;
  line-height: 1.8;
  color: var(--ct-soft);
}

.page-contact .ct-flow__steps {
  list-style: none;
  margin: 34px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
}

.page-contact .ct-flow__step {
  padding: 24px 20px 22px;
  border: 2px solid var(--line);
  border-top: 4px solid var(--line);
  background-color: rgba(7, 21, 34, .72);
  transition: border-color .3s ease, transform .3s ease;
}

.page-contact .ct-flow__step--live {
  border-top-color: var(--orange);
  background: linear-gradient(180deg, rgba(255, 106, 26, .14), rgba(7, 21, 34, .82) 48%);
}

.page-contact .ct-flow__step:hover {
  transform: translateY(-4px);
  border-color: rgba(53, 208, 186, .45);
}

.page-contact .ct-flow__step--live:hover {
  border-color: rgba(255, 106, 26, .6);
}

.page-contact .ct-flow__no {
  display: block;
  font-size: 32px;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -.02em;
  color: rgba(233, 238, 243, .15);
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-flow__step--live .ct-flow__no {
  color: rgba(255, 106, 26, .42);
}

.page-contact .ct-flow__step h3 {
  margin: 14px 0 8px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .ct-flow__step p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(233, 238, 243, .76);
}

/* ---------- 合作与媒体 ---------- */
.page-contact .ct-collab__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  align-items: start;
}

.page-contact .ct-collab__intro p {
  font-size: 16.5px;
  line-height: 1.82;
  color: rgba(233, 238, 243, .84);
}

.page-contact .ct-collab__facts {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .ct-collab__facts li {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1.5px solid rgba(233, 238, 243, .12);
  font-size: 15px;
  line-height: 1.7;
  color: rgba(233, 238, 243, .86);
}

.page-contact .ct-collab__facts strong {
  flex: 0 0 auto;
  color: var(--cyan);
  font-weight: 700;
  letter-spacing: .01em;
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-collab__card {
  padding: 24px 20px;
  border: 2px solid rgba(233, 238, 243, .22);
  background-color: rgba(4, 9, 16, .55);
  box-shadow: 8px 8px 0 rgba(4, 9, 16, .5);
}

.page-contact .ct-collab__card h3 {
  margin: 0 0 16px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .ct-collab__card ol {
  list-style: none;
  counter-reset: ct-collab;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 13px;
}

.page-contact .ct-collab__card li {
  counter-increment: ct-collab;
  position: relative;
  padding-left: 34px;
  font-size: 15px;
  line-height: 1.7;
  color: rgba(233, 238, 243, .88);
}

.page-contact .ct-collab__card li::before {
  content: counter(ct-collab, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--orange);
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-collab__contact {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1.5px solid rgba(233, 238, 243, .18);
  font-size: 15px;
  line-height: 1.82;
  color: rgba(233, 238, 243, .82);
}

.page-contact .ct-copy {
  font-weight: 700;
  color: var(--cyan);
  word-break: break-all;
  user-select: all;
  font-variant-numeric: tabular-nums;
}

/* ---------- 备案与地区 ---------- */
.page-contact .ct-legal {
  background-color: var(--night-deep);
  padding-bottom: 88px;
}

.page-contact .ct-legal__wrap {
  width: 100%;
  max-width: 820px;
  margin: 0 auto;
  padding: 0 22px;
}

.page-contact .ct-legal__list {
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .ct-legal__list > div {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 15px 0;
  border-bottom: 1.5px solid rgba(233, 238, 243, .1);
}

.page-contact .ct-legal__list dt {
  font-size: 13px;
  letter-spacing: .07em;
  color: var(--slate);
}

.page-contact .ct-legal__list dd {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--ice);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-legal__list dd .note {
  display: block;
  margin-top: 5px;
  font-size: 13px;
  line-height: 1.6;
  letter-spacing: 0;
  color: var(--slate);
}

.page-contact .ct-legal__foot {
  margin: 28px 0 0;
  padding-left: 16px;
  border-left: 3px solid var(--orange);
  font-size: 14px;
  line-height: 1.85;
  color: var(--slate);
}

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

.page-contact .ct-legal__foot a:hover,
.page-contact .ct-legal__foot a:focus-visible {
  color: var(--orange);
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .ct-hero {
    padding: 76px 0 60px;
  }

  .page-contact .ct-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin-top: 44px;
  }

  .page-contact .ct-nudge {
    padding: 28px 30px;
  }

  .page-contact .ct-channel__sum {
    padding: 19px 22px;
  }

  .page-contact .ct-channel__body {
    padding: 18px 22px 22px;
  }

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

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

  .page-contact .ct-flow__step {
    padding: 28px 24px 26px;
  }

  .page-contact .ct-legal__list > div {
    grid-template-columns: 150px minmax(0, 1fr);
    gap: 22px;
    align-items: baseline;
  }
}

@media (min-width: 1000px) {
  .page-contact .ct-nudge {
    grid-template-columns: minmax(0, 1.55fr) minmax(0, 1fr);
    gap: 32px;
  }

  .page-contact .ct-split {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: 28px;
  }

  .page-contact .ct-flow__steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .ct-collab__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 40px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-channel,
  .page-contact .ct-channel__chev,
  .page-contact .ct-flow__step,
  .page-contact .ct-check__box {
    transition: none;
  }

  .page-contact .ct-channel:hover,
  .page-contact .ct-flow__step:hover {
    transform: none;
  }
}