.page-contact {
  background: var(--ink);
  color: var(--text);
}

.page-contact .co-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

/* ---------- 区块标题 ---------- */
.page-contact .co-head {
  display: grid;
  gap: 8px;
  max-width: 780px;
  padding-bottom: 16px;
  margin: 0 0 clamp(22px, 3.4vw, 34px);
  border-bottom: 1px solid var(--grid);
}

.page-contact .co-head--paper {
  border-bottom-color: rgba(11, 26, 18, 0.16);
}

.page-contact .co-head__sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 42ch;
}

.page-contact .co-head--paper .co-head__sub {
  color: var(--on-paper-muted);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  padding: clamp(22px, 4vw, 42px) 0 clamp(50px, 8vw, 96px);
  background:
    radial-gradient(115% 80% at 92% -10%, rgba(31, 169, 122, 0.18), transparent 60%),
    radial-gradient(80% 60% at 0% 100%, rgba(255, 106, 31, 0.08), transparent 65%),
    var(--ink);
  overflow: hidden;
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--grid-body) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-body) 1px, transparent 1px);
  background-size: 72px 72px;
  pointer-events: none;
}

.page-contact .co-hero__grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 5vw, 52px);
}

.page-contact .co-hero__title {
  margin: 12px 0 0;
  max-width: 15ch;
  font-size: clamp(30px, 5.6vw, 58px);
  line-height: 1.1;
  letter-spacing: -0.02em;
}

.page-contact .co-hero__lede {
  margin: 18px 0 0;
  max-width: 46ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--text);
}

.page-contact .co-hero__list {
  list-style: none;
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  border-top: 1px solid var(--grid);
}

.page-contact .co-hero__item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  align-items: baseline;
  gap: 2px 10px;
  padding: 14px 0;
  border-bottom: 1px solid var(--grid);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .co-hero__item:hover {
  border-bottom-color: var(--signal);
}

.page-contact .co-hero__num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--pitch);
}

.page-contact .co-hero__label {
  font-size: clamp(19px, 3.1vw, 27px);
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .co-hero__note {
  grid-column: 2;
  margin-top: 3px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
}

/* ---------- 首屏联系卡 ---------- */
.page-contact .co-card {
  position: relative;
  padding: clamp(20px, 3.4vw, 28px);
  background: var(--night);
  border: 1px solid var(--grid);
  border-top: 3px solid var(--signal);
}

.page-contact .co-card__head {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--volt);
}

.page-contact .co-card__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 4px 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--grid);
}

.page-contact .co-card__key {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .co-card__val {
  min-width: 0;
  font-size: 15px;
  line-height: 1.6;
  word-break: break-word;
}

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

.page-contact .co-card__row--addr .co-card__val--addr {
  grid-column: 1 / -1;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .co-card__copy {
  justify-self: end;
}

.page-contact .co-card__foot {
  margin: 16px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 四种合作方式 ---------- */
.page-contact .co-kinds__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-contact .co-kind {
  position: relative;
  background: var(--ink);
  transition: background var(--dur) var(--ease);
}

.page-contact .co-kind:hover {
  background: #0A1A28;
}

.page-contact .co-kind[open] {
  background: #0A1A28;
}

.page-contact .co-kind__summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 6px 14px;
  padding: clamp(18px, 3vw, 26px);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .co-kind__summary::after {
  content: "+";
  position: absolute;
  top: clamp(18px, 3vw, 26px);
  right: clamp(18px, 3vw, 26px);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--pitch);
  transition: color var(--dur) var(--ease);
}

.page-contact .co-kind[open] .co-kind__summary::after {
  content: "−";
  color: var(--signal);
}

.page-contact .co-kind__idx {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--signal);
}

.page-contact .co-kind__title {
  margin: 0;
  padding-right: 30px;
  font-size: clamp(19px, 2.2vw, 23px);
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .co-kind__meta {
  grid-column: 2;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-contact .co-kind__body {
  padding: 0 clamp(18px, 3vw, 26px) clamp(20px, 3vw, 26px);
  border-top: 1px solid var(--grid);
  margin-top: 2px;
  padding-top: 16px;
}

.page-contact .co-kind__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--text);
  max-width: 40ch;
}

.page-contact .co-kind__text a {
  color: var(--volt);
  text-decoration: none;
  border-bottom: 1px solid var(--signal);
}

.page-contact .co-kind__text a:hover {
  color: var(--signal);
}

.page-contact .co-kind__req {
  margin-top: 16px;
}

.page-contact .co-kind__req-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--pitch);
  margin-bottom: 8px;
}

.page-contact .co-kind__req ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 7px;
}

.page-contact .co-kind__req li {
  position: relative;
  padding-left: 15px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .co-kind__req li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 1px;
  background: var(--signal);
}

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

/* ---------- 媒体占位 ---------- */
.page-contact .co-media {
  margin: clamp(28px, 4vw, 46px) 0 0;
  display: grid;
  gap: 14px;
}

.page-contact .co-media__frame,
.page-contact .co-need__frame {
  aspect-ratio: 3 / 2;
  overflow: hidden;
  width: 100%;
}

.page-contact .co-media__frame img,
.page-contact .co-need__frame img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .co-media__caption,
.page-contact .co-need__caption {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-left: 1px solid var(--signal);
  padding-left: 12px;
}

@media (min-width: 880px) {
  .page-contact .co-media {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
    align-items: end;
    gap: 24px;
  }
}

/* ---------- 需求说明 ---------- */
.page-contact .section--paper {
  background: var(--paper);
  color: var(--on-paper);
}

.page-contact .co-need__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: rgba(11, 26, 18, 0.14);
  border: 1px solid rgba(11, 26, 18, 0.14);
}

.page-contact .co-need__item {
  background: var(--paper);
  padding: 22px 20px;
}

.page-contact .co-need__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: #C44E12;
}

.page-contact .co-need__title {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--on-paper);
}

.page-contact .co-need__item p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--on-paper-muted);
}

.page-contact .co-need__media {
  margin: clamp(26px, 4vw, 42px) 0 0;
  display: grid;
  gap: 12px;
}

.page-contact .co-need__caption {
  color: var(--on-paper-muted);
  border-left-color: #C44E12;
}

@media (min-width: 700px) {
  .page-contact .co-need__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .co-need__item:last-child {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-contact .co-need__media {
    grid-template-columns: minmax(0, 1fr) minmax(0, 260px);
    align-items: end;
    gap: 24px;
  }
}

/* ---------- 五步流程 ---------- */
.page-contact .co-flow {
  background: linear-gradient(180deg, var(--night), #0B3126 55%, var(--night));
}

.page-contact .co-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
}

.page-contact .co-flow__step {
  position: relative;
  padding-top: 20px;
  border-top: 1px solid var(--grid-strong);
}

.page-contact .co-flow__step::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 0;
  width: 34px;
  height: 1px;
  background: var(--signal);
  transform: scaleX(0.35);
  transform-origin: left center;
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .co-flow__step:hover::before {
  transform: scaleX(1);
  background: var(--volt);
}

.page-contact .co-flow__num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--pitch);
}

.page-contact .co-flow__title {
  margin: 8px 0 0;
  font-size: 19px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--text);
}

.page-contact .co-flow__text {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .co-flow__time {
  display: block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
  transition: color var(--dur) var(--ease);
}

.page-contact .co-flow__step:hover .co-flow__time {
  color: var(--volt);
}

@media (min-width: 1000px) {
  .page-contact .co-flow__list {
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 18px;
    align-items: start;
  }
  .page-contact .co-flow__step:nth-child(1) { margin-top: 0; }
  .page-contact .co-flow__step:nth-child(2) { margin-top: 34px; }
  .page-contact .co-flow__step:nth-child(3) { margin-top: 68px; }
  .page-contact .co-flow__step:nth-child(4) { margin-top: 102px; }
  .page-contact .co-flow__step:nth-child(5) { margin-top: 136px; }
}

/* ---------- 联系方式 ---------- */
.page-contact .co-reach__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 44px);
}

.page-contact .co-ch {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 6px 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--grid);
  transition: border-color var(--dur) var(--ease);
}

.page-contact .co-ch:hover {
  border-bottom-color: var(--signal);
}

.page-contact .co-ch__key {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--pitch);
}

.page-contact .co-ch__val {
  min-width: 0;
  font-size: clamp(16px, 2.4vw, 22px);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--text);
  word-break: break-word;
}

.page-contact .co-ch__val.num {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

.page-contact .co-ch__val--addr {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.8vw, 17px);
  line-height: 1.7;
}

.page-contact .co-ch__copy {
  justify-self: end;
}

.page-contact .co-ch__note {
  grid-column: 1 / -1;
  margin: 4px 0 0;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 46ch;
}

.page-contact .co-reach__aside {
  display: grid;
  gap: 12px;
  align-content: start;
  padding: clamp(18px, 3vw, 26px);
  border: 1px solid var(--grid);
  background: rgba(14, 59, 46, 0.42);
}

.page-contact .co-map {
  display: block;
  width: 100%;
  height: auto;
}

.page-contact .co-map__cap {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .co-reach__aside-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--text);
}

@media (min-width: 900px) {
  .page-contact .co-reach__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 售后与投诉 ---------- */
.page-contact .co-after__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 36px);
  align-items: start;
}

.page-contact .co-after__lead h2 {
  margin: 12px 0 0;
}

.page-contact .co-after__text {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text);
  max-width: 44ch;
}

.page-contact .co-after__cards {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  background: var(--grid);
  border: 1px solid var(--grid);
}

.page-contact .co-after__card {
  background: var(--ink);
  padding: 20px;
  transition: background var(--dur) var(--ease);
}

.page-contact .co-after__card:hover {
  background: #0A1A28;
}

.page-contact .co-after__card-title {
  margin: 12px 0 0;
  font-size: 17px;
  font-weight: 800;
  color: var(--text);
}

.page-contact .co-after__card p {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .co-after__btn {
  justify-self: start;
}

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

@media (min-width: 1000px) {
  .page-contact .co-after__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-contact .co-after__btn {
    grid-column: 1 / -1;
  }
}

/* ---------- 合作速答 ---------- */
.page-contact .co-qa__list {
  display: grid;
  gap: 1px;
  background: rgba(11, 26, 18, 0.14);
  border: 1px solid rgba(11, 26, 18, 0.14);
}

.page-contact .co-qa__item {
  background: var(--paper);
}

.page-contact .co-qa__q {
  position: relative;
  display: block;
  padding: 18px 52px 18px 20px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--on-paper);
  cursor: pointer;
  list-style: none;
  transition: color var(--dur) var(--ease);
}

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

.page-contact .co-qa__q::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 17px;
  line-height: 1.5;
  color: #C44E12;
}

.page-contact .co-qa__item[open] .co-qa__q::after {
  content: "−";
}

.page-contact .co-qa__item:hover .co-qa__q {
  color: #C44E12;
}

.page-contact .co-qa__a {
  margin: 0;
  padding: 0 20px 20px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--on-paper-muted);
  max-width: 68ch;
}

/* ---------- 继续了解 ---------- */
.page-contact .co-next {
  padding: clamp(38px, 6vw, 72px) 0;
  border-top: 1px solid var(--grid);
  background: var(--ink-deep);
}

.page-contact .co-next__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-contact .co-next__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .co-next__links {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 10px;
}

.page-contact .co-next__links a {
  display: block;
  padding: 12px 0;
  border-top: 1px solid var(--grid);
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text);
  text-decoration: none;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .co-next__links a:hover {
  color: var(--volt);
  border-top-color: var(--signal);
}

@media (min-width: 640px) {
  .page-contact .co-next__links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 900px) {
  .page-contact .co-next__inner {
    grid-template-columns: minmax(0, 3fr) minmax(0, 9fr);
    align-items: start;
    gap: 28px;
  }
}

/* ---------- 降低动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .co-hero__item,
  .page-contact .co-kind,
  .page-contact .co-flow__step::before,
  .page-contact .co-flow__time,
  .page-contact .co-ch,
  .page-contact .co-after__card,
  .page-contact .co-qa__q,
  .page-contact .co-next__links a {
    transition: none;
  }
}
</main>