.page-contact {
  --ct-hair: var(--ink-700);
  --ct-hair-soft: rgba(154, 167, 188, 0.22);
  background: var(--ink-900);
  color: var(--paper);
  font-family: var(--font-sans);
  line-height: 1.85;
  overflow-x: hidden;
}

.page-contact img {
  display: block;
  max-width: 100%;
  height: auto;
}

.page-contact .shell {
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */

.ct-hero {
  padding: clamp(32px, 6vw, 68px) 0 clamp(36px, 5vw, 60px);
  border-bottom: 1px solid var(--ct-hair);
}

.ct-crumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--graphite);
  margin-bottom: clamp(24px, 4vw, 40px);
}

.ct-crumb a {
  color: var(--graphite);
  text-decoration: none;
  transition: color var(--dur) var(--ease);
}

.ct-crumb a:hover {
  color: var(--cyan);
}

.page-contact h1 {
  font-family: var(--font-serif);
  font-weight: 900;
  font-size: clamp(32px, 6vw, 72px);
  line-height: 1.14;
  letter-spacing: -0.01em;
  margin: 12px 0 20px;
  max-width: 17em;
  color: var(--paper);
}

.ct-lede {
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.85;
  color: var(--mist);
  max-width: 36em;
  margin: 0;
}

.ct-quick {
  margin-top: clamp(28px, 4vw, 48px);
  border-top: 1px solid var(--ct-hair);
}

.ct-quick-row {
  display: grid;
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--ct-hair);
}

.ct-quick-label {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--graphite);
}

.ct-quick-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  font-size: clamp(16px, 2.1vw, 21px);
  color: var(--paper);
  word-break: break-word;
}

.ct-quick-value--hot {
  color: var(--orange);
}

.ct-quick-value--plain {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 章节框架 ---------- */

.ct-section {
  padding: clamp(52px, 8vw, 100px) 0;
  border-bottom: 1px solid var(--ct-hair);
}

.ct-section-head {
  max-width: 46rem;
  margin-bottom: clamp(30px, 4vw, 52px);
}

.ct-section-head h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 42px);
  line-height: 1.28;
  letter-spacing: -0.01em;
  margin: 14px 0 14px;
  color: var(--paper);
}

.ct-section-head p {
  margin: 0;
  color: var(--graphite);
  font-size: clamp(15px, 1.5vw, 16.5px);
  max-width: 34em;
}

/* ---------- 联系渠道 ---------- */

.ct-channels {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
}

.ct-channel-list {
  min-width: 0;
}

.ct-channel {
  padding: 22px 0;
  border-top: 1px solid var(--ct-hair);
}

.ct-channel:last-child {
  border-bottom: 1px solid var(--ct-hair);
}

.ct-channel-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 20px;
  margin-bottom: 10px;
}

.ct-channel-top h3 {
  margin: 0;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--graphite);
}

.ct-channel-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  font-size: clamp(15px, 1.9vw, 19px);
  color: var(--orange);
  word-break: break-word;
}

.ct-channel-value--plain {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.7vw, 17px);
  color: var(--paper);
}

.ct-channel p {
  margin: 0;
  color: var(--graphite);
  font-size: 15.5px;
  line-height: 1.85;
  max-width: 40em;
}

.ct-figure {
  margin: 0;
  min-width: 0;
}

.ct-figure .media-frame {
  border: 1px solid var(--ct-hair);
}

.ct-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ---------- 咨询分类 ---------- */

.ct-accordion {
  border-top: 1px solid var(--ct-hair);
}

.ct-item {
  border-bottom: 1px solid var(--ct-hair);
}

.ct-item summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 18px;
  padding: 20px 0;
  cursor: pointer;
  list-style: none;
}

.ct-item summary::-webkit-details-marker {
  display: none;
}

.ct-item summary::marker {
  content: "";
}

.ct-item-no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.12em;
  color: var(--orange);
  min-width: 2.4em;
}

.ct-item-title {
  flex: 1 1 auto;
  font-size: clamp(16px, 2vw, 20px);
  font-weight: 600;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

.ct-item summary:hover .ct-item-title {
  color: var(--cyan);
}

.ct-item-meta {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: var(--graphite);
}

.ct-item[open] .ct-item-title {
  color: var(--cyan);
}

.ct-item-body {
  padding: 0 0 24px 0;
  border-left: 1px solid var(--cyan);
  padding-left: 18px;
  margin-left: 2px;
}

.ct-item-body p {
  margin: 0 0 10px;
  color: var(--graphite);
  font-size: 15.5px;
  line-height: 1.85;
  max-width: 38em;
}

.ct-item-body p:last-child {
  margin-bottom: 0;
}

/* ---------- 浅底：安装预约清单 ---------- */

.ct-section--mist {
  background: var(--mist);
  color: var(--ink-900);
  border-bottom-color: var(--ink-900);
}

.ct-section--mist .ct-section-head h2 {
  color: var(--ink-900);
}

.ct-section--mist .ct-section-head p {
  color: var(--ink-700);
}

.ct-section--mist .eyebrow {
  color: var(--ink-700);
}

.ct-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(11, 18, 32, 0.18);
}

.ct-checklist li {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(11, 18, 32, 0.18);
}

.ct-box {
  width: 16px;
  height: 16px;
  margin-top: 6px;
  border: 1px solid var(--ink-900);
  display: block;
}

.ct-checklist h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-900);
}

.ct-checklist p {
  margin: 0;
  color: var(--ink-700);
  font-size: 15px;
  line-height: 1.8;
  max-width: 46em;
}

.ct-note {
  margin: clamp(24px, 3vw, 34px) 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--ink-700);
}

/* ---------- 区域对接 ---------- */

.ct-section--band {
  background: var(--ink-800);
}

.ct-network-media {
  margin: 0 0 clamp(30px, 4vw, 52px);
}

.ct-network-media .media-frame {
  border: 1px solid var(--ct-hair);
}

.ct-network-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ct-nodes {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--ct-hair);
}

.ct-nodes li {
  display: grid;
  grid-template-columns: 2.6em 1fr;
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--ct-hair);
}

.ct-node-id {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--orange);
  padding-top: 5px;
}

.ct-nodes h3 {
  margin: 0 0 4px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.ct-nodes p {
  margin: 0;
  color: var(--graphite);
  font-size: 15px;
  line-height: 1.8;
  max-width: 44em;
}

/* ---------- 合作与供应对接 ---------- */

.ct-partners {
  display: grid;
  gap: clamp(30px, 4vw, 48px);
}

.ct-partner {
  padding-top: 22px;
  border-top: 2px solid var(--orange);
}

.ct-partner-no {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--graphite);
}

.ct-partner h3 {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(20px, 2.4vw, 26px);
  color: var(--paper);
}

.ct-partner > p {
  margin: 0 0 18px;
  color: var(--graphite);
  font-size: 15.5px;
  line-height: 1.85;
  max-width: 34em;
}

.ct-partner-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.ct-partner-list li {
  position: relative;
  padding: 9px 0 9px 20px;
  font-size: 15px;
  color: var(--mist);
  border-bottom: 1px solid var(--ct-hair-soft);
}

.ct-partner-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 18px;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 收尾 ---------- */

.ct-recap {
  padding: clamp(48px, 7vw, 88px) 0 clamp(56px, 8vw, 96px);
  background: var(--ink-900);
}

.ct-recap h2 {
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(24px, 3.2vw, 40px);
  line-height: 1.28;
  margin: 14px 0 14px;
  color: var(--paper);
}

.ct-recap > .shell > p {
  margin: 0 0 clamp(26px, 3vw, 38px);
  color: var(--graphite);
  font-size: clamp(15px, 1.5vw, 16.5px);
  max-width: 34em;
}

.ct-recap-rows {
  border-top: 1px solid var(--ct-hair);
}

.ct-recap-row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--ct-hair);
}

.ct-recap-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.02em;
  font-size: clamp(16px, 2vw, 20px);
  color: var(--paper);
  word-break: break-word;
}

.ct-recap-value--plain {
  font-family: var(--font-sans);
  font-size: clamp(15px, 1.6vw, 16.5px);
  line-height: 1.7;
  color: var(--mist);
}

.ct-recap-next {
  margin: clamp(26px, 3vw, 36px) 0 0;
  color: var(--graphite);
  font-size: 15px;
  line-height: 1.9;
  max-width: 44em;
}

.ct-recap-next a {
  color: var(--paper);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan);
  padding-bottom: 1px;
  transition: color var(--dur) var(--ease);
}

.ct-recap-next a:hover {
  color: var(--cyan);
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .ct-quick-row {
    grid-template-columns: 150px minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }

  .ct-recap-row {
    grid-template-columns: 90px minmax(0, 1fr);
    align-items: baseline;
    gap: 24px;
  }

  .ct-item-body {
    padding-left: 22px;
    margin-left: 2.4em;
  }
}

@media (min-width: 900px) {
  .ct-partners {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(40px, 5vw, 72px);
  }

  .ct-checklist {
    border-top: 0;
  }

  .ct-checklist li {
    border-top: 1px solid rgba(11, 18, 32, 0.18);
    border-bottom: 0;
  }
}

@media (min-width: 1000px) {
  .ct-channels {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .ct-nodes {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(32px, 4vw, 56px);
  }
}

@media (min-width: 1200px) {
  .ct-nodes li {
    padding: 20px 0;
  }
}