/* =========================================================
   合作与联系 /cooperation/  ·  page-contact
   ========================================================= */

.page-contact {
  --ct-leaf: clamp(40px, 7vw, 92px);
  --ct-accent: var(--cat-clean);
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  padding-top: clamp(18px, 3vw, 30px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mist);
}

.page-contact .crumbs a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s ease, border-color .2s ease;
}

.page-contact .crumbs a:hover {
  color: var(--cat-clean);
  border-bottom-color: currentColor;
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  background: linear-gradient(168deg, var(--paper-cold) 0%, var(--paper-warm) 100%);
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-intro {
  max-width: 880px;
  padding: clamp(22px, 4vw, 42px) 0 clamp(30px, 5vw, 56px);
}

.page-contact .ct-kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .22em;
  color: var(--cat-repair);
}

.page-contact .ct-intro h1 {
  margin: 0 0 20px;
  font-size: clamp(30px, 5.6vw, 58px);
  line-height: 1.1;
  font-weight: 900;
  letter-spacing: -.02em;
  color: var(--ink);
  text-wrap: balance;
}

.page-contact .ct-lede {
  margin: 0 0 16px;
  max-width: 60ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-contact .ct-note {
  margin: 0;
  font-family: var(--font-hand);
  font-size: 15px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 通用小元素 ---------- */
.page-contact .ct-link {
  color: var(--cat-clean);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 127, 184, .4);
  transition: border-color .2s ease;
}

.page-contact .ct-link:hover {
  border-bottom-color: var(--cat-clean);
}

.page-contact .ct-link--light {
  color: var(--warn-1);
  border-bottom-color: rgba(240, 194, 41, .45);
}

.page-contact .index-strip {
  margin-bottom: 16px;
}

.page-contact .ct-sec-lede {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 01 合作方式 ---------- */
.page-contact .ct-coop {
  padding-top: var(--ct-leaf);
}

.page-contact .ct-coop__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-contact .ct-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px 18px;
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-top: 3px solid var(--ct-accent);
  box-shadow: var(--shadow-panel);
}

.page-contact .ct-card--clean { --ct-accent: var(--cat-clean); }
.page-contact .ct-card--pipe  { --ct-accent: var(--cat-pipe); }
.page-contact .ct-card--repair{ --ct-accent: var(--cat-repair); }
.page-contact .ct-card--house { --ct-accent: var(--cat-house); }

.page-contact .ct-card__no {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--ct-accent);
}

.page-contact .ct-card h3 {
  margin: 0;
  font-size: 17.5px;
  line-height: 1.45;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .ct-card__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--ink-soft);
}

.page-contact .ct-card__list li {
  position: relative;
  padding-left: 16px;
}

.page-contact .ct-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .66em;
  width: 6px;
  height: 6px;
  background: var(--ct-accent);
  border-radius: 1px;
}

.page-contact .ct-card .tag {
  margin-top: auto;
  align-self: flex-start;
}

.page-contact .ct-figure {
  margin: clamp(24px, 4vw, 42px) 0 0;
}

/* ---------- 02 合作流程 ---------- */
.page-contact .ct-flow {
  padding-top: var(--ct-leaf);
}

.page-contact .ct-steps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .ct-step__box {
  background: var(--paper-warm);
  border: 1px solid var(--line);
  border-left: 4px solid var(--cat-repair);
  box-shadow: var(--shadow-panel);
}

.page-contact .ct-step__box > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  padding: 15px 16px;
  cursor: pointer;
  list-style: none;
}

.page-contact .ct-step__box > summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-step__no {
  flex: 0 0 auto;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--cat-repair);
}

.page-contact .ct-step__head {
  flex: 1 1 200px;
  min-width: 0;
  display: grid;
  gap: 2px;
}

.page-contact .ct-step__title {
  font-size: 17px;
  font-weight: 800;
  line-height: 1.4;
  color: var(--ink);
}

.page-contact .ct-step__meta {
  font-size: 13px;
  line-height: 1.55;
  color: var(--mist);
}

.page-contact .ct-step__tog {
  flex: 0 0 auto;
  position: relative;
  width: 22px;
  height: 22px;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  transition: border-color .2s ease;
}

.page-contact .ct-step__tog::before,
.page-contact .ct-step__tog::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--ink);
  transform: translate(-50%, -50%);
}

.page-contact .ct-step__tog::before {
  width: 10px;
  height: 1.5px;
}

.page-contact .ct-step__tog::after {
  width: 1.5px;
  height: 10px;
  transition: opacity .2s ease;
}

.page-contact .ct-step__box[open] .ct-step__tog {
  border-color: var(--cat-repair);
}

.page-contact .ct-step__box[open] .ct-step__tog::after {
  opacity: 0;
}

.page-contact .ct-step__body {
  margin: 0 16px 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--line-strong);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.page-contact .ct-step__body p {
  margin: 0;
}

/* ---------- 03 结算与对接 ---------- */
.page-contact .ct-settle {
  padding-top: var(--ct-leaf);
}

.page-contact .ct-settle__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-contact .ct-settle__item {
  position: relative;
  padding: 22px 18px 20px;
  background: transparent;
  border: 1px solid var(--line);
}

.page-contact .ct-settle__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 36px;
  height: 3px;
  background: var(--cat-house);
}

.page-contact .ct-settle__no {
  display: block;
  margin-bottom: 8px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--cat-house);
}

.page-contact .ct-settle__item h3 {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .ct-settle__item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ---------- 04 联系方式 ---------- */
.page-contact .ct-reach {
  margin-top: var(--ct-leaf);
  padding: clamp(34px, 6vw, 76px) 0;
  background: var(--ink);
  color: var(--paper-cold);
}

.page-contact .ct-reach .index-strip__no {
  color: var(--warn-1);
}

.page-contact .ct-reach .index-strip__label {
  color: rgba(220, 233, 242, .78);
}

.page-contact .ct-reach__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
  margin-top: 22px;
}

.page-contact .ct-reach__col h2 {
  margin: 0;
  max-width: 22ch;
  font-size: clamp(22px, 3.4vw, 34px);
  line-height: 1.3;
  font-weight: 900;
  letter-spacing: -.01em;
  color: var(--paper-warm);
}

.page-contact .ct-channels {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-contact .ct-channels li {
  display: grid;
  gap: 5px;
  padding: 15px 0;
  border-top: 1px solid rgba(220, 233, 242, .18);
}

.page-contact .ct-channels li:last-child {
  border-bottom: 1px solid rgba(220, 233, 242, .18);
}

.page-contact .ct-channels__key {
  font-size: 11.5px;
  font-weight: 700;
  letter-spacing: .18em;
  color: var(--warn-1);
}

.page-contact .ct-channels__val {
  font-size: clamp(15px, 2.1vw, 19px);
  line-height: 1.4;
  color: var(--paper-warm);
  word-break: break-word;
}

.page-contact .ct-channels__hint {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(220, 233, 242, .62);
}

.page-contact .ct-brief {
  margin-top: 24px;
  border: 1px solid rgba(220, 233, 242, .22);
  background: rgba(220, 233, 242, .05);
}

.page-contact .ct-brief > summary {
  padding: 14px 16px;
  cursor: pointer;
  list-style: none;
  font-size: 14.5px;
  font-weight: 700;
  color: var(--paper-warm);
}

.page-contact .ct-brief > summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-brief > summary::after {
  content: "＋";
  float: right;
  font-family: var(--font-mono);
  color: var(--warn-1);
}

.page-contact .ct-brief[open] > summary::after {
  content: "－";
}

.page-contact .ct-brief__list {
  margin: 0;
  padding: 0 16px 16px 34px;
  list-style: none;
  display: grid;
  gap: 7px;
}

.page-contact .ct-brief__list li {
  position: relative;
  font-size: 14px;
  line-height: 1.7;
  color: rgba(220, 233, 242, .8);
}

.page-contact .ct-brief__list li::before {
  content: "";
  position: absolute;
  left: -16px;
  top: .68em;
  width: 6px;
  height: 6px;
  background: var(--cat-clean);
  border-radius: 1px;
}

.page-contact .ct-reach__foot {
  margin: 22px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(220, 233, 242, .6);
}

.page-contact .ct-reach__map {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 18px;
}

.page-contact .ct-map {
  display: block;
  width: 100%;
  max-width: 340px;
  height: auto;
}

.page-contact .ct-map__rings circle {
  fill: none;
  stroke: rgba(220, 233, 242, .22);
  stroke-width: 1;
  stroke-dasharray: 3 7;
}

.page-contact .ct-map__dots circle {
  fill: var(--cat-clean);
  stroke: var(--ink);
  stroke-width: 2;
}

.page-contact .ct-map__dots circle:nth-child(2) { fill: var(--cat-pipe); }
.page-contact .ct-map__dots circle:nth-child(3) { fill: var(--cat-repair); }
.page-contact .ct-map__dots circle:nth-child(4) { fill: var(--cat-house); }
.page-contact .ct-map__dots circle:nth-child(5) { fill: var(--cat-clean); }
.page-contact .ct-map__dots circle:nth-child(6) { fill: var(--cat-pipe); }
.page-contact .ct-map__dots circle:nth-child(7) { fill: var(--cat-repair); }
.page-contact .ct-map__dots circle:nth-child(8) { fill: var(--cat-house); }
.page-contact .ct-map__dots circle:nth-child(9) { fill: var(--cat-clean); }
.page-contact .ct-map__dots circle:nth-child(10) { fill: var(--cat-pipe); }
.page-contact .ct-map__dots circle:nth-child(11) { fill: var(--cat-repair); }

.page-contact .ct-map__core {
  fill: var(--warn-1);
  stroke: var(--ink);
  stroke-width: 2;
}

.page-contact .ct-map__caption {
  margin: 0;
  max-width: 46ch;
  font-size: 14px;
  line-height: 1.85;
  color: rgba(220, 233, 242, .72);
}

/* ---------- 场地横幅 ---------- */
.page-contact .ct-venue {
  padding-top: clamp(30px, 5vw, 56px);
}

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

/* ---------- 05 常见问题 ---------- */
.page-contact .ct-faq {
  padding-top: var(--ct-leaf);
}

.page-contact .ct-faq__list {
  margin-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .ct-q {
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-q > summary {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  cursor: pointer;
  list-style: none;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.page-contact .ct-q > summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-q > summary::before {
  content: "";
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  background: var(--cat-clean);
  transform: rotate(45deg);
}

.page-contact .ct-q > summary::after {
  content: "＋";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--mist);
  transition: color .2s ease;
}

.page-contact .ct-q[open] > summary::after {
  content: "－";
  color: var(--cat-clean);
}

.page-contact .ct-q__body {
  padding: 0 0 20px 21px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-contact .ct-q__body p {
  margin: 0;
  max-width: 70ch;
}

.page-contact .ct-q__body a {
  color: var(--cat-clean);
  text-decoration: none;
  border-bottom: 1px solid rgba(30, 127, 184, .4);
}

.page-contact .ct-q__body a:hover {
  border-bottom-color: var(--cat-clean);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .ct-coop__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .page-contact .ct-reach__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-contact .ct-coop__grid {
    gap: 18px;
  }

  .page-contact .ct-coop__grid > :nth-child(2) { margin-top: 26px; }
  .page-contact .ct-coop__grid > :nth-child(4) { margin-top: 26px; }

  .page-contact .ct-settle__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 18px;
  }

  .page-contact .ct-step:nth-child(2) { margin-left: 26px; }
  .page-contact .ct-step:nth-child(3) { margin-left: 52px; }
  .page-contact .ct-step:nth-child(4) { margin-left: 78px; }
  .page-contact .ct-step:nth-child(5) { margin-left: 104px; }

  .page-contact .ct-steps {
    gap: 12px;
  }
}

@media (min-width: 1200px) {
  .page-contact .ct-intro {
    padding-bottom: 64px;
  }

  .page-contact .ct-reach__grid {
    gap: 72px;
  }
}

/* ---------- 动效减弱 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-link,
  .page-contact .crumbs a,
  .page-contact .ct-step__tog,
  .page-contact .ct-step__tog::after,
  .page-contact .ct-q > summary::after {
    transition: none;
  }
}