.page-contact {
  background:
    radial-gradient(110% 55% at 90% -10%, rgba(33, 230, 208, .10), transparent 60%),
    radial-gradient(85% 55% at -5% 38%, rgba(255, 107, 61, .07), transparent 62%),
    var(--ink-900);
  color: var(--text);
  font-family: var(--font-sans);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  padding: 1.4rem 0 0;
}
.page-contact .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .45rem;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.page-contact .crumbs a {
  color: var(--text-dim);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}
.page-contact .crumbs a:hover,
.page-contact .crumbs a:focus-visible {
  color: var(--sonar);
}
.page-contact .crumbs li + li::before {
  content: "/";
  margin-right: .45rem;
  color: var(--stone);
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  padding-top: 2.5rem;
}
.page-contact .ct-hero__grid {
  display: grid;
  gap: 2.5rem;
}
.page-contact .ct-hero h1 {
  margin: 1.1rem 0 0;
  max-width: 17ch;
  font-size: clamp(38px, 8.4vw, 92px);
  line-height: 1.04;
  font-weight: 800;
  letter-spacing: -.025em;
  color: var(--text-strong);
}
.page-contact .ct-hero .lede {
  margin: 1.4rem 0 0;
  max-width: 56ch;
}
.page-contact .ct-hero__aside {
  padding: 1.6rem 1.5rem;
}
.page-contact .ct-status {
  display: grid;
  gap: 1.2rem;
  margin: 0;
}
.page-contact .ct-status dt {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text-mute);
}
.page-contact .ct-status dd {
  margin: .4rem 0 0;
  font-size: 18px;
  color: var(--text-strong);
}

/* ---------- 渠道 ---------- */
.page-contact .ct-channels__grid {
  display: grid;
  gap: 0;
  margin-top: 2.5rem;
  border-top: 1px solid var(--line);
}
.page-contact .ct-channel {
  padding: 1.7rem 0;
  border-bottom: 1px solid var(--line);
}
.page-contact .ct-channel__role {
  margin: 0 0 .85rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--sonar);
}
.page-contact .ct-channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2.1vw, 23px);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--text-strong);
  overflow-wrap: anywhere;
}
.page-contact .ct-channel__note {
  margin: .9rem 0 0;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}
.page-contact .ct-visual {
  margin-top: 3.5rem;
}

/* ---------- 高频问题前置 ---------- */
.page-contact .ct-fast__grid {
  display: grid;
  gap: 2.5rem;
}
.page-contact .ct-faq {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-contact .ct-faq li {
  border-bottom: 1px solid var(--line);
}
.page-contact .ct-faq summary {
  position: relative;
  padding: 1.2rem 2.2rem 1.2rem 0;
  cursor: pointer;
  list-style: none;
  font-size: 17px;
  font-weight: 600;
  line-height: 1.55;
  color: var(--text-strong);
}
.page-contact .ct-faq summary::-webkit-details-marker {
  display: none;
}
.page-contact .ct-faq summary::after {
  content: "+";
  position: absolute;
  right: .15rem;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--sonar);
}
.page-contact .ct-faq details[open] summary::after {
  content: "–";
}
.page-contact .ct-faq summary:focus-visible {
  outline: 2px solid var(--sonar);
  outline-offset: 3px;
}
.page-contact .ct-faq details > p {
  margin: 0 0 1.4rem;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}
.page-contact .ct-fast__tail {
  margin: 2rem 0 0;
}

/* ---------- 订阅协助 ---------- */
.page-contact .ct-brief {
  display: grid;
  gap: 0;
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.page-contact .ct-brief li {
  display: grid;
  grid-template-columns: 2.6rem minmax(0, 1fr);
  gap: 1rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--line);
}
.page-contact .ct-brief__k {
  padding-top: .2rem;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--sonar);
}
.page-contact .ct-brief p {
  margin: 0;
  max-width: 60ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dim);
}
.page-contact .ct-brief strong {
  display: block;
  margin-bottom: .35rem;
  font-weight: 600;
  color: var(--text-strong);
}
.page-contact .ct-help__tail {
  margin: 2rem 0 0;
  max-width: 62ch;
  padding-left: 1.1rem;
  border-left: 2px solid var(--coral);
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
}

/* ---------- 企业数据合作 ---------- */
.page-contact .ct-biz__grid {
  display: grid;
  gap: 2.5rem;
}
.page-contact .ct-biz__intro .t-body + .t-body {
  margin-top: 1.1rem;
}
.page-contact .ct-biz__intro p + p {
  margin-top: 1.1rem;
}
.page-contact .ct-biz__fields {
  padding: 1.75rem 1.5rem;
  background: var(--ink-800);
  border-left: 2px solid var(--sonar);
}
.page-contact .ct-biz__fields-title {
  margin: 0 0 1rem;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--sonar-soft);
}
.page-contact .ct-biz__fields ul {
  display: grid;
  gap: .85rem;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-contact .ct-biz__fields li {
  position: relative;
  padding-left: 1.15rem;
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--text);
}
.page-contact .ct-biz__fields li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  background: var(--coral);
}

/* ---------- 运营与响应 ---------- */
.page-contact .ct-ops__grid {
  display: grid;
  gap: 2rem;
  margin-top: 2.5rem;
}
.page-contact .ct-ops__grid p + p {
  margin-top: 1.1rem;
}
.page-contact .ct-topics {
  display: grid;
  gap: 1.1rem;
  align-content: start;
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-contact .ct-topics li {
  display: grid;
  gap: .5rem;
  padding-bottom: 1.1rem;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-dim);
}
.page-contact .ct-topics li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}
.page-contact .ct-topics .tag {
  justify-self: start;
}

/* ---------- 合作流程 ---------- */
.page-contact .ct-steps {
  list-style: none;
  margin: 2.5rem 0 0;
  padding: 0 0 0 1.75rem;
  border-left: 1px solid var(--line-sonar);
}
.page-contact .ct-steps li {
  position: relative;
}
.page-contact .ct-steps li + li details {
  border-top: 1px solid var(--line);
}
.page-contact .ct-steps summary {
  display: flex;
  align-items: baseline;
  gap: .9rem;
  padding: 1.5rem 0;
  cursor: pointer;
  list-style: none;
}
.page-contact .ct-steps summary::-webkit-details-marker {
  display: none;
}
.page-contact .ct-steps summary:focus-visible {
  outline: 2px solid var(--sonar);
  outline-offset: 3px;
}
.page-contact .ct-steps__no {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--coral);
}
.page-contact .ct-steps__name {
  flex: 1 1 auto;
  font-size: clamp(18px, 2vw, 22px);
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--text-strong);
}
.page-contact .ct-steps summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--sonar);
}
.page-contact .ct-steps details[open] summary::after {
  content: "–";
}
.page-contact .ct-steps__body {
  padding: 0 0 1.6rem;
}
.page-contact .ct-steps__body p {
  margin: 0 0 .9rem;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-dim);
}
.page-contact .ct-steps__body p.ct-steps__prep {
  display: inline-block;
  margin: 0;
  padding: .45rem .9rem;
  background: var(--ink-800);
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--sonar-soft);
}

/* ---------- 页尾收束 ---------- */
.page-contact .ct-tail {
  padding-bottom: 0;
}
.page-contact .ct-tail__figure {
  margin: 0;
}
.page-contact .ct-tail__band {
  position: relative;
  margin-top: 4rem;
  padding: 4.5rem 0 5rem;
  background: linear-gradient(180deg, var(--ink-850), var(--ink-800));
}
.page-contact .ct-tail__band::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--sonar), transparent);
  opacity: .45;
  transform: rotate(-.9deg);
  transform-origin: left center;
}
.page-contact .ct-tail__note {
  margin-top: 1.75rem;
  display: grid;
  gap: 1.1rem;
  max-width: 68ch;
}
.page-contact .ct-tail__note .t-body {
  margin: 0;
}
.page-contact .ct-tail__note a {
  color: var(--sonar);
  text-decoration: none;
  border-bottom: 1px solid var(--line-sonar);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .ct-tail__note a:hover,
.page-contact .ct-tail__note a:focus-visible {
  color: var(--sonar-soft);
  border-color: var(--sonar-soft);
}

/* ---------- 响应式 ---------- */
@media (min-width: 900px) {
  .page-contact .ct-hero {
    padding-top: 4.5rem;
  }
  .page-contact .ct-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 4.5rem;
  }
  .page-contact .ct-fast__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 4.5rem;
    align-items: start;
  }
  .page-contact .ct-biz__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 4.5rem;
    align-items: start;
  }
  .page-contact .ct-ops__grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 4.5rem;
  }
  .page-contact .ct-steps {
    padding-left: 2.5rem;
  }
}

@media (min-width: 820px) {
  .page-contact .ct-channels__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .ct-channel {
    padding: 2.1rem 1.75rem;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }
  .page-contact .ct-channel:first-child {
    padding-left: 0;
  }
  .page-contact .ct-channel:last-child {
    padding-right: 0;
    border-right: 0;
  }
}

@media (max-width: 519px) {
  .page-contact .ct-steps {
    padding-left: 1.1rem;
  }
  .page-contact .ct-steps summary {
    gap: .65rem;
  }
  .page-contact .ct-steps__name {
    font-size: 17px;
  }
}
<<<END>>>