.page-contact {
  --coop-shell: 1240px;
  --coop-rule: 1px;
}

.page-contact .coop-hero {
  padding-top: 8px;
}

.page-contact .coop-hero__grid {
  align-items: start;
  row-gap: 40px;
}

.page-contact .coop-hero__index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--nebula);
  margin: 0 0 20px;
  text-transform: uppercase;
}

.page-contact .coop-hero__title {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(2rem, 7.2vw, 3.6rem);
  line-height: 1.18;
  letter-spacing: -0.01em;
  color: var(--white);
  margin: 0 0 22px;
}

.page-contact .coop-hero__lead {
  max-width: 60ch;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--silver);
  margin: 0 0 28px;
}

.page-contact .coop-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.page-contact .coop-hero__facts {
  list-style: none;
  margin: 0;
  padding: 18px 0 0;
  border-top: var(--coop-rule) solid var(--line);
  display: grid;
  gap: 10px;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--silver);
}

.page-contact .coop-hero__facts .data-num {
  color: var(--cyan);
  font-size: 15px;
}

.page-contact .coop-hero__media {
  margin: 0;
}

.page-contact .coop-hero__media .media-frame {
  border: var(--coop-rule) solid var(--line);
  background: var(--layer);
}

.page-contact .coop-hero__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .coop-hero__media .media-frame__caption {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--silver);
  padding: 12px 14px;
  border-top: var(--coop-rule) solid var(--line);
  margin: 0;
}

/* ---- 对页布局 ---- */
.page-contact .coop-pair {
  padding-top: 24px;
}

.page-contact .coop-pair__layout {
  position: relative;
  display: grid;
  gap: 48px;
}

.page-contact .coop-pair__spine {
  display: none;
}

.page-contact .coop-pair__left,
.page-contact .coop-pair__right {
  min-width: 0;
}

.page-contact .coop-pair .section__head {
  margin-bottom: 28px;
}

.page-contact .coop-pair .section__title {
  color: var(--white);
  font-size: clamp(1.5rem, 5.4vw, 2.2rem);
  line-height: 1.25;
  letter-spacing: -0.01em;
  margin: 8px 0 14px;
}

.page-contact .coop-pair .section__lead {
  color: var(--silver);
  font-size: 0.98rem;
  line-height: 1.8;
  max-width: 46ch;
  margin: 0;
}

.page-contact .coop-pair .section__index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin: 0;
}

/* 伙伴画像 */
.page-contact .coop-who {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--coop-rule) solid var(--line);
}

.page-contact .coop-who__item {
  background: var(--ink);
  padding: 24px 22px 26px;
  transition: background 240ms ease;
}

.page-contact .coop-who__item:hover {
  background: var(--layer);
}

.page-contact .coop-who__item .tag {
  display: inline-block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  padding: 4px 9px;
  border: var(--coop-rule) solid currentColor;
  margin-bottom: 14px;
}

.page-contact .coop-who__item .tag--expert { color: var(--nebula); }
.page-contact .coop-who__item .tag--live { color: var(--cyan); }
.page-contact .coop-who__item .tag--time { color: var(--amber); }

.page-contact .coop-who__title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1.06rem;
  line-height: 1.45;
  color: var(--white);
  margin: 0 0 10px;
}

.page-contact .coop-who__item p {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .coop-pair__plate {
  margin: 26px 0 0;
  background: var(--cream);
  color: var(--ink-brown);
  padding: 20px 22px;
  border-left: 3px solid var(--amber);
}

.page-contact .coop-pair__plate .plate__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 10px;
  color: var(--ink-brown);
}

.page-contact .coop-pair__plate .plate__text {
  margin: 0;
  font-size: 0.9rem;
  line-height: 1.78;
}

/* 联系信息 */
.page-contact .coop-contact {
  border-top: var(--coop-rule) solid var(--line);
}

.page-contact .coop-contact__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: var(--coop-rule) solid var(--line);
}

.page-contact .coop-contact__label {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .coop-contact__value {
  color: var(--white);
  font-size: 0.98rem;
  line-height: 1.7;
  word-break: break-word;
}

.page-contact .coop-contact__value.data-num {
  font-family: var(--mono);
  font-size: 1rem;
  letter-spacing: 0.01em;
}

.page-contact .coop-prep {
  margin-top: 30px;
  padding: 22px 22px 24px;
  background: var(--layer);
  border: var(--coop-rule) solid var(--line);
}

.page-contact .coop-prep__title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1rem;
  color: var(--white);
  margin: 0 0 16px;
}

.page-contact .coop-prep__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .coop-prep__list li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  align-items: baseline;
  font-size: 0.92rem;
  line-height: 1.72;
  color: var(--silver);
}

.page-contact .coop-prep__list .data-num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--amber);
}

/* 抽象方位图 */
.page-contact .coop-map {
  position: relative;
  margin: 26px 0 0;
  padding: 26px 22px;
  border: var(--coop-rule) solid var(--line);
  background: var(--ink);
  overflow: hidden;
}

.page-contact .coop-map__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 34px 34px;
  opacity: 0.55;
  pointer-events: none;
}

.page-contact .coop-map__pin {
  position: relative;
  width: 58px;
  height: 58px;
  border: var(--coop-rule) solid var(--nebula);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.page-contact .coop-map__pin::before,
.page-contact .coop-map__pin::after {
  content: "";
  position: absolute;
  background: var(--nebula);
  opacity: 0.6;
}

.page-contact .coop-map__pin::before {
  left: -22px;
  right: -22px;
  height: 1px;
}

.page-contact .coop-map__pin::after {
  top: -22px;
  bottom: -22px;
  width: 1px;
}

.page-contact .coop-map__dot {
  width: 10px;
  height: 10px;
  background: var(--cyan);
  display: block;
}

.page-contact .coop-map__label {
  position: relative;
  margin: 0 0 8px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--white);
}

.page-contact .coop-map__caption {
  position: relative;
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--silver);
}

/* 留黑刻度 */
.page-contact .coop-hold {
  margin: 40px 0;
  min-height: 96px;
  display: flex;
  align-items: center;
  position: relative;
}

.page-contact .coop-hold .container {
  display: flex;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.page-contact .coop-hold__line {
  flex: 1;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--line) 40%, var(--nebula));
  display: block;
}

.page-contact .coop-hold__mark {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--amber);
  letter-spacing: 0.1em;
}

/* 三类合作 */
.page-contact .coop-types .section__head {
  max-width: 62ch;
  margin-bottom: 32px;
}

.page-contact .coop-types .section__index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-contact .coop-types .section__title {
  color: var(--white);
  font-size: clamp(1.5rem, 5.4vw, 2.2rem);
  line-height: 1.25;
  margin: 0 0 14px;
}

.page-contact .coop-types .section__lead {
  color: var(--silver);
  font-size: 0.98rem;
  line-height: 1.8;
  margin: 0;
}

.page-contact .coop-types__grid {
  display: grid;
  gap: 26px;
}

.page-contact .coop-types__list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--coop-rule) solid var(--line);
  align-content: start;
}

.page-contact .coop-type {
  display: grid;
  gap: 6px;
  text-align: left;
  width: 100%;
  padding: 20px 20px 22px;
  background: var(--ink);
  border: 0;
  border-left: 3px solid transparent;
  color: inherit;
  font: inherit;
  cursor: pointer;
  transition: background 220ms ease, border-color 220ms ease;
}

.page-contact .coop-type:hover,
.page-contact .coop-type:focus-visible {
  background: var(--layer);
}

.page-contact .coop-type[aria-expanded="true"] {
  border-left-color: var(--nebula);
  background: var(--layer);
}

.page-contact .coop-type:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: -2px;
}

.page-contact .coop-type__num {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--amber);
  letter-spacing: 0.1em;
}

.page-contact .coop-type__name {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1.05rem;
  color: var(--white);
}

.page-contact .coop-type__hint {
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--silver);
}

.page-contact .coop-types__panels {
  border: var(--coop-rule) solid var(--line);
  background: var(--layer);
  padding: 24px 22px 26px;
}

.page-contact .coop-panel__title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1.12rem;
  line-height: 1.45;
  color: var(--white);
  margin: 0 0 12px;
}

.page-contact .coop-types__panels p {
  margin: 0 0 14px;
  font-size: 0.94rem;
  line-height: 1.85;
  color: var(--silver);
}

.page-contact .coop-panel__list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .coop-panel__list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--silver);
}

.page-contact .coop-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-contact .coop-panel__note {
  font-size: 0.88rem !important;
  line-height: 1.8;
  color: var(--silver);
  padding-top: 14px;
  border-top: var(--coop-rule) solid var(--line);
}

.page-contact .coop-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(63, 224, 208, 0.4);
}

.page-contact .coop-link:hover,
.page-contact .coop-link:focus-visible {
  color: var(--white);
  border-bottom-color: var(--white);
}

/* 流程刻度 */
.page-contact .coop-flow .section__head {
  max-width: 60ch;
  margin-bottom: 34px;
}

.page-contact .coop-flow .section__index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 10px;
}

.page-contact .coop-flow .section__title {
  color: var(--white);
  font-size: clamp(1.5rem, 5.4vw, 2.2rem);
  line-height: 1.25;
  margin: 0 0 14px;
}

.page-contact .coop-flow .section__lead {
  color: var(--silver);
  font-size: 0.98rem;
  line-height: 1.8;
  margin: 0;
}

.page-contact .coop-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: var(--coop-rule) solid var(--line);
}

.page-contact .coop-track__step {
  position: relative;
  padding: 24px 0 26px 26px;
  border-bottom: var(--coop-rule) solid var(--line);
  transition: background 240ms ease;
}

.page-contact .coop-track__step::before {
  content: "";
  position: absolute;
  left: 0;
  top: 32px;
  width: 10px;
  height: 1px;
  background: var(--nebula);
}

.page-contact .coop-track__step:hover {
  background: rgba(122, 92, 255, 0.06);
}

.page-contact .coop-track__mark {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--nebula);
  display: block;
  margin-bottom: 8px;
}

.page-contact .coop-track__title {
  font-family: var(--sans);
  font-weight: 800;
  font-size: 1.08rem;
  color: var(--white);
  margin: 0 0 6px;
}

.page-contact .coop-track__time {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--amber);
  margin: 0 0 10px;
}

.page-contact .coop-track__text {
  margin: 0 0 12px;
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .coop-track__out {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.7;
  color: var(--cyan);
  font-family: var(--mono);
}

.page-contact .coop-flow__note {
  margin: 22px 0 0;
  font-size: 0.92rem;
  line-height: 1.75;
  color: var(--silver);
  padding-left: 14px;
  border-left: 2px solid var(--cyan);
}

/* 供稿与素材 */
.page-contact .coop-supply__grid {
  row-gap: 34px;
}

.page-contact .coop-supply .section__head {
  margin-bottom: 24px;
}

.page-contact .coop-supply .section__index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  margin: 0 0 10px;
}

.page-contact .coop-supply .section__title {
  color: var(--white);
  font-size: clamp(1.5rem, 5.4vw, 2.2rem);
  line-height: 1.25;
  margin: 0 0 14px;
}

.page-contact .coop-supply .section__lead {
  color: var(--silver);
  font-size: 0.98rem;
  line-height: 1.8;
  margin: 0;
  max-width: 40ch;
}

.page-contact .coop-spec {
  margin: 0;
  border-top: var(--coop-rule) solid var(--line);
}

.page-contact .coop-spec__row {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-bottom: var(--coop-rule) solid var(--line);
}

.page-contact .coop-spec__row dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--nebula);
}

.page-contact .coop-spec__row dd {
  margin: 0;
  font-size: 0.93rem;
  line-height: 1.82;
  color: var(--silver);
}

.page-contact .coop-supply__note {
  margin: 20px 0 0;
  font-size: 0.9rem;
  line-height: 1.8;
  color: var(--silver);
}

.page-contact .coop-supply__media {
  margin: 0;
}

.page-contact .coop-supply__media .media-frame {
  border: var(--coop-rule) solid var(--line);
  background: var(--layer);
  position: sticky;
  top: calc(var(--header-h, 76px) + 16px);
}

.page-contact .coop-supply__media .media-frame__img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .coop-supply__media .media-frame__caption {
  font-family: var(--mono);
  font-size: 12px;
  line-height: 1.7;
  color: var(--silver);
  padding: 12px 14px;
  border-top: var(--coop-rule) solid var(--line);
  margin: 0;
}

/* 常见问法 */
.page-contact .coop-faq .section__head {
  margin-bottom: 26px;
}

.page-contact .coop-faq .section__index {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--amber);
  margin: 0 0 10px;
}

.page-contact .coop-faq .section__title {
  color: var(--white);
  font-size: clamp(1.5rem, 5.4vw, 2.2rem);
  line-height: 1.25;
  margin: 0;
}

.page-contact .coop-faq__grid {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: var(--coop-rule) solid var(--line);
}

.page-contact .coop-faq__item {
  background: var(--ink);
  padding: 22px 20px 24px;
}

.page-contact .coop-faq__q {
  font-family: var(--sans);
  font-weight: 700;
  font-size: 1rem;
  line-height: 1.55;
  color: var(--white);
  margin: 0 0 10px;
}

.page-contact .coop-faq__a {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.82;
  color: var(--silver);
}

/* CTA */
.page-contact .coop-cta {
  padding-bottom: 48px;
}

.page-contact .coop-cta__box {
  display: grid;
  gap: 22px;
  padding: 30px 24px;
  background: linear-gradient(120deg, var(--layer), rgba(122, 92, 255, 0.18));
  border: var(--coop-rule) solid var(--line);
  border-left: 3px solid var(--nebula);
}

.page-contact .coop-cta__title {
  font-family: var(--sans);
  font-weight: 900;
  font-size: clamp(1.35rem, 4.6vw, 1.9rem);
  line-height: 1.3;
  color: var(--white);
  margin: 0 0 10px;
}

.page-contact .coop-cta__text p {
  margin: 0;
  font-size: 0.95rem;
  line-height: 1.8;
  color: var(--silver);
  max-width: 52ch;
}

.page-contact .coop-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* 平板 */
@media (min-width: 700px) {
  .page-contact .coop-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .coop-contact__row,
  .page-contact .coop-spec__row {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 20px;
    align-items: start;
  }

  .page-contact .coop-faq__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .coop-types__grid {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 0;
    border: var(--coop-rule) solid var(--line);
  }

  .page-contact .coop-types__list {
    border: 0;
    border-right: var(--coop-rule) solid var(--line);
  }

  .page-contact .coop-types__panels {
    border: 0;
    padding: 28px 30px 30px;
  }

  .page-contact .coop-cta__box {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    padding: 34px 30px;
  }
}

/* 桌面：对页布局 */
@media (min-width: 1000px) {
  .page-contact .coop-pair__layout {
    grid-template-columns: minmax(0, 1fr) 1px minmax(0, 1fr);
    gap: 0;
    column-gap: 0;
  }

  .page-contact .coop-pair__spine {
    display: block;
    position: relative;
    grid-column: 2;
    background: linear-gradient(180deg, transparent, var(--line) 12%, var(--nebula) 50%, var(--line) 88%, transparent);
    margin: 0 30px;
  }

  .page-contact .coop-pair__tick {
    position: absolute;
    left: -4px;
    width: 9px;
    height: 1px;
    background: var(--cyan);
    display: block;
  }

  .page-contact .coop-pair__tick--a { top: 22%; }
  .page-contact .coop-pair__tick--b { top: 44%; }
  .page-contact .coop-pair__tick--c { top: 66%; }
  .page-contact .coop-pair__tick--d { top: 88%; }

  .page-contact .coop-pair__left {
    grid-column: 1;
    padding-right: 40px;
  }

  .page-contact .coop-pair__right {
    grid-column: 3;
    padding-left: 40px;
  }

  .page-contact .coop-who {
    border: 0;
    background: transparent;
    gap: 0;
  }

  .page-contact .coop-who__item {
    border: var(--coop-rule) solid var(--line);
    border-bottom: 0;
    padding: 26px 24px 28px;
  }

  .page-contact .coop-who__item:last-child {
    border-bottom: var(--coop-rule) solid var(--line);
  }

  .page-contact .coop-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .coop-track__step {
    padding: 26px 22px 28px 26px;
    border-bottom: 0;
    border-left: var(--coop-rule) solid var(--line);
  }

  .page-contact .coop-track__step:first-child {
    border-left: 0;
  }

  .page-contact .coop-track__step::before {
    top: 34px;
    left: 0;
    width: 16px;
  }

  .page-contact .coop-supply__text {
    grid-column: 1 / span 5;
  }

  .page-contact .coop-supply__media {
    grid-column: 7 / span 6;
    align-self: start;
  }

  .page-contact .coop-hero__grid {
    align-items: center;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-who__item,
  .page-contact .coop-type,
  .page-contact .coop-track__step,
  .page-contact .coop-link {
    transition: none;
  }
}