.page-contact {
  --co-panel: 340px;
  color: var(--text-body);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero-band {
  padding-bottom: var(--s-3);
}

.page-contact .crumbs {
  margin-bottom: var(--s-2);
}

.page-contact .co-hero {
  display: grid;
  gap: var(--s-2);
}

.page-contact .co-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--white);
  margin: 12px 0 var(--s-1);
}

.page-contact .co-hero .lede {
  max-width: 58ch;
  margin: 0;
}

.page-contact .co-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: var(--s-2);
}

.page-contact .co-hero__facts {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  overflow: hidden;
}

.page-contact .co-hero__facts .stat {
  background: var(--ink-800);
  padding: var(--s-1);
  display: flex;
  align-items: baseline;
  gap: 12px;
}

.page-contact .co-hero__facts .stat__num {
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  color: var(--white);
  flex: none;
}

.page-contact .co-hero__facts .stat__label {
  font-size: 14px;
  color: var(--muted);
}

@media (min-width: 600px) and (max-width: 959px) {
  .page-contact .co-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 960px) {
  .page-contact .co-hero {
    grid-template-columns: minmax(0, 1.45fr) minmax(280px, 1fr);
    align-items: end;
    gap: var(--s-3);
  }
}

/* ---------- 主体布局 ---------- */
.page-contact .co-body {
  padding-top: var(--s-3);
}

.page-contact .co-layout {
  display: grid;
  gap: var(--s-3);
}

.page-contact .co-main {
  display: grid;
  gap: var(--s-3);
  min-width: 0;
}

@media (min-width: 1080px) {
  .page-contact .co-layout {
    grid-template-columns: minmax(0, 1fr) var(--co-panel);
    gap: var(--s-3);
    align-items: start;
  }
  .page-contact .co-side {
    position: sticky;
    top: calc(var(--bar-h) + var(--s-1));
  }
}

/* ---------- 章节标题组 ---------- */
.page-contact .section-head {
  margin-bottom: var(--s-2);
}

.page-contact .section-head h2 {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(24px, 3.2vw, 32px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 10px 0 0;
}

.page-contact .section-head p {
  margin: 12px 0 0;
  max-width: 64ch;
}

/* ---------- 图片 ---------- */
.page-contact .co-figure {
  margin: 0 0 var(--s-2);
  border-radius: var(--r-lg);
  overflow: hidden;
  border: 1px solid var(--line-soft);
  background: var(--ink-800);
}

.page-contact .co-figure .media__img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

.page-contact .co-figure .media__caption {
  padding: 12px var(--s-1);
  font-size: 14px;
  color: var(--muted);
  border-top: 1px solid var(--line-soft);
}

.page-contact .co-figure--tight {
  margin-bottom: var(--s-2);
}

/* ---------- 合作类型 ---------- */
.page-contact .co-types {
  position: relative;
}

.page-contact .co-types__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .co-types__tabs {
  display: grid;
  gap: 12px;
}

@media (min-width: 760px) {
  .page-contact .co-types__tabs {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

.page-contact .co-type-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--s-1);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--ink-800);
  cursor: pointer;
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease),
    background var(--dur) var(--ease);
}

.page-contact .co-type-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.page-contact .co-type-card__idx {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--state);
}

.page-contact .co-type-card__name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
}

.page-contact .co-type-card__for {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
}

.page-contact #co-type-1:checked ~ .co-types__tabs [for="co-type-1"],
.page-contact #co-type-2:checked ~ .co-types__tabs [for="co-type-2"],
.page-contact #co-type-3:checked ~ .co-types__tabs [for="co-type-3"] {
  border-color: var(--accent);
  background: var(--ink-700);
}

.page-contact .co-types__panels {
  margin-top: var(--s-2);
}

.page-contact .co-type-panel {
  display: none;
  padding: var(--s-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--ink-800);
}

.page-contact #co-type-1:checked ~ .co-types__panels #co-panel-1,
.page-contact #co-type-2:checked ~ .co-types__panels #co-panel-2,
.page-contact #co-type-3:checked ~ .co-types__panels #co-panel-3 {
  display: block;
}

.page-contact .co-type-panel__title {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 var(--s-1);
  padding-left: 14px;
  border-left: 3px solid var(--accent);
  line-height: 1.2;
}

.page-contact .co-spec {
  margin: 0;
  display: grid;
  gap: 18px;
}

@media (min-width: 760px) {
  .page-contact .co-spec {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px var(--s-2);
  }
}

.page-contact .co-spec__row dt {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--state);
  margin-bottom: 6px;
}

.page-contact .co-spec__row dd {
  margin: 0;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
}

/* ---------- 合作流程 ---------- */
.page-contact .co-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .co-step {
  position: relative;
  padding: var(--s-1);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  background: var(--ink-800);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .co-step:hover,
.page-contact .co-step:focus-within {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.page-contact .co-step__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
  margin-bottom: 12px;
}

.page-contact .co-step__title {
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 8px;
}

.page-contact .co-step__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-body);
}

@media (min-width: 900px) {
  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: var(--s-2);
  }
  .page-contact .co-step::after {
    content: "";
    position: absolute;
    top: 38px;
    right: calc(var(--s-2) * -1);
    width: var(--s-2);
    height: 1px;
    background: var(--line-soft);
    transition: background var(--dur) var(--ease);
  }
  .page-contact .co-step:last-child::after {
    display: none;
  }
  .page-contact .co-step:hover::after,
  .page-contact .co-step:focus-within::after {
    background: var(--accent);
  }
}

/* ---------- 可合作资源位 ---------- */
.page-contact .co-slots {
  display: grid;
  gap: var(--s-2);
}

.page-contact .co-wire-scroll {
  overflow-x: auto;
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--ink-800);
  padding: var(--s-1);
}

.page-contact .co-wire {
  display: block;
  width: 100%;
  min-width: 560px;
  height: auto;
}

.page-contact .co-wire__frame rect {
  fill: none;
  stroke: var(--line-soft);
  stroke-width: 1;
}

.page-contact .co-wire__block rect {
  fill: rgba(36, 80, 155, 0.3);
  stroke: none;
}

.page-contact .co-wire__hot rect {
  fill: rgba(232, 84, 42, 0.08);
  stroke: var(--accent);
  stroke-width: 1.6;
  stroke-dasharray: 6 4;
}

.page-contact .co-wire__link line {
  stroke: var(--line);
  stroke-width: 1;
}

.page-contact .co-wire__dot circle {
  fill: var(--accent);
}

.page-contact .co-wire__note text {
  fill: var(--muted);
  font-family: var(--font-mono);
  font-size: 15px;
  text-anchor: middle;
}

.page-contact .co-slots__side {
  display: grid;
  gap: var(--s-2);
  min-width: 0;
}

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

.page-contact .co-slot {
  padding: 16px var(--s-1);
  border-left: 2px solid var(--line);
  border-radius: 0 var(--r-md) var(--r-md) 0;
  background: var(--ink-800);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .co-slot:hover {
  border-left-color: var(--accent);
  background: var(--ink-700);
}

.page-contact .co-slot__title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 6px;
}

.page-contact .co-slot__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--text-body);
}

.page-contact .co-slots__more {
  margin: 0;
  font-size: 15px;
  color: var(--muted);
}

@media (min-width: 920px) {
  .page-contact .co-slots {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
    gap: var(--s-3);
    align-items: start;
  }
}

/* ---------- 合作伙伴 ---------- */
.page-contact .co-partners {
  display: grid;
  gap: 14px;
}

.page-contact .co-partner {
  padding: var(--s-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--ink-800);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .co-partner:hover {
  border-color: var(--accent);
}

.page-contact .co-partner__name {
  font-family: var(--font-head);
  font-size: 20px;
  font-weight: 700;
  color: var(--white);
  margin: 0 0 10px;
}

.page-contact .co-partner__text {
  margin: 0;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-body);
}

.page-contact .co-partner a {
  color: var(--accent-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (min-width: 760px) {
  .page-contact .co-partners {
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: var(--s-2);
  }
  .page-contact .co-partner:first-child {
    grid-column: span 6;
    display: grid;
    grid-template-columns: minmax(0, 200px) minmax(0, 1fr);
    gap: var(--s-2);
    align-items: start;
  }
  .page-contact .co-partner:first-child .co-partner__name {
    margin-bottom: 0;
  }
  .page-contact .co-partner:nth-child(2) {
    grid-column: span 3;
  }
  .page-contact .co-partner:nth-child(3) {
    grid-column: span 3;
  }
}

/* ---------- 联系渠道 ---------- */
.page-contact .co-channels {
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-md);
  overflow: hidden;
}

.page-contact .co-channel {
  background: var(--ink-800);
  padding: 16px var(--s-1);
  display: grid;
  gap: 6px;
}

.page-contact .co-channel__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--state);
}

.page-contact .co-channel__val {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-body);
  word-break: break-word;
}

.page-contact .co-channel__val.mono {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--white);
  word-break: break-all;
}

@media (min-width: 640px) {
  .page-contact .co-channel {
    grid-template-columns: 170px minmax(0, 1fr);
    gap: var(--s-1);
    align-items: baseline;
  }
}

.page-contact .co-reach__tail {
  margin: var(--s-2) 0 0;
  font-size: 15px;
  color: var(--muted);
}

.page-contact .co-reach__tail a {
  color: var(--accent-hi);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 右侧常驻联系面板 ---------- */
.page-contact .co-side {
  padding: var(--s-2);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-lg);
  background: var(--ink-800);
  position: relative;
  overflow: hidden;
  min-width: 0;
}

.page-contact .co-side::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--accent-hi));
}

.page-contact .co-side__eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--state);
  margin: 0 0 8px;
}

.page-contact .co-side__title {
  font-family: var(--font-head);
  font-size: 22px;
  font-weight: 800;
  line-height: 1.3;
  color: var(--white);
  margin: 0 0 var(--s-1);
}

.page-contact .co-side__list {
  list-style: none;
  margin: 0 0 var(--s-1);
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .co-line {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 6px 10px;
  align-items: center;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .co-line:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.page-contact .co-line__label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--muted);
}

.page-contact .co-line__value {
  font-size: 15px;
  line-height: 1.6;
  color: var(--white);
  word-break: break-word;
}

.page-contact .co-line__value.mono {
  font-family: var(--font-mono);
  font-size: 13px;
  word-break: break-all;
}

.page-contact .co-copy {
  flex: none;
}

.page-contact .co-copy.is-copied {
  border-color: var(--state);
  color: var(--state);
}

.page-contact .co-side__note {
  margin: 0 0 var(--s-1);
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .co-side__link {
  display: inline-flex;
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq-band {
  padding-top: var(--s-3);
  padding-bottom: var(--s-3);
}

.page-contact .co-faq-head h2 {
  color: var(--text-dark);
}

.page-contact .co-faq-head .eyebrow {
  color: var(--accent);
}

.page-contact .co-faq {
  display: grid;
  gap: 10px;
}

.page-contact .co-faq details {
  background: var(--white);
  border: 1px solid rgba(11, 18, 32, 0.12);
  border-radius: var(--r-md);
  padding: 0 var(--s-1);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .co-faq details[open] {
  border-color: var(--accent);
}

.page-contact .co-faq summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--text-dark);
}

.page-contact .co-faq summary::-webkit-details-marker {
  display: none;
}

.page-contact .co-faq summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--accent);
  transition: transform var(--dur) var(--ease);
}

.page-contact .co-faq details[open] summary::after {
  transform: rotate(45deg);
}

.page-contact .co-faq details p {
  margin: 0 0 18px;
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-dark);
  max-width: 72ch;
}

.page-contact .co-faq-tail {
  margin: var(--s-2) 0 0;
  font-size: 15px;
  color: var(--text-dark);
}

.page-contact .co-faq-tail .mono {
  font-family: var(--font-mono);
  font-size: 14px;
  word-break: break-all;
}

@media (min-width: 900px) {
  .page-contact .co-faq-band {
    padding-top: var(--s-3);
    padding-bottom: var(--s-3);
  }
}

/* ---------- 收尾与减动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .co-type-card,
  .page-contact .co-step,
  .page-contact .co-slot,
  .page-contact .co-partner,
  .page-contact .co-faq details,
  .page-contact .co-faq summary::after {
    transition: none;
  }
  .page-contact .co-type-card:hover,
  .page-contact .co-step:hover,
  .page-contact .co-step:focus-within {
    transform: none;
  }
}