.page-contact {
  --coop-edge: rgba(124, 77, 255, .3);
  --coop-edge-soft: rgba(74, 70, 100, .34);
  --coop-panel-a: rgba(30, 26, 51, .96);
  --coop-panel-b: rgba(18, 16, 31, .92);
  background: var(--void);
  color: var(--ice);
}

/* ---------- 首屏 ---------- */

.page-contact .coop-hero {
  position: relative;
  overflow: hidden;
}

.page-contact .coop-hero::before {
  content: "";
  position: absolute;
  top: -30%;
  right: -12%;
  width: 62%;
  height: 150%;
  background: radial-gradient(closest-side, rgba(124, 77, 255, .24), rgba(124, 77, 255, 0) 72%);
  transform: rotate(-8deg);
  pointer-events: none;
  z-index: 0;
}

.page-contact .coop-hero .shell {
  position: relative;
  z-index: 1;
}

.page-contact .coop-hero__intro {
  max-width: 44rem;
  margin-top: clamp(24px, 4vw, 44px);
  margin-bottom: clamp(34px, 5vw, 64px);
}

.page-contact .coop-hero__title {
  margin: 14px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(34px, 7.4vw, 84px);
  line-height: 1.02;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-contact .coop-hero__lede {
  margin: 22px 0 0;
  max-width: 34em;
  font-size: 16px;
  line-height: 1.85;
  color: var(--graphite);
}

/* 合作方向拼贴 */

.page-contact .coop-tiles {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.page-contact .coop-tile {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 150px;
  padding: 24px 20px 28px;
  background: linear-gradient(152deg, var(--coop-panel-a), var(--coop-panel-b));
  box-shadow: inset 0 0 0 1px var(--coop-edge);
  clip-path: polygon(26px 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%, 0 26px);
  transition: transform .35s cubic-bezier(.2, .7, .3, 1), box-shadow .35s ease;
}

.page-contact .coop-tile:focus-visible {
  outline: none;
  box-shadow: inset 0 0 0 2px var(--cyan);
}

.page-contact .coop-tile__idx {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan);
}

.page-contact .coop-tile__name {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 1.7vw, 21px);
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .coop-tile__desc {
  margin: 0;
  display: grid;
  grid-template-rows: 1fr;
  transition: grid-template-rows .35s ease;
}

.page-contact .coop-tile__desc > span {
  display: block;
  min-height: 0;
  overflow: hidden;
  font-size: 13px;
  line-height: 1.75;
  color: var(--graphite);
}

@media (min-width: 880px) {
  .page-contact .coop-tiles {
    flex-direction: row;
    align-items: stretch;
    gap: 14px;
  }

  .page-contact .coop-tile:nth-child(1),
  .page-contact .coop-tile:nth-child(2) {
    flex: 3 1 0;
    min-width: 0;
  }

  .page-contact .coop-tile:nth-child(3),
  .page-contact .coop-tile:nth-child(4) {
    flex: 2 1 0;
    min-width: 0;
  }
}

@media (min-width: 880px) and (hover: hover) and (pointer: fine) {
  .page-contact .coop-tile {
    min-height: 200px;
  }

  .page-contact .coop-tile:hover,
  .page-contact .coop-tile:focus-visible {
    transform: translateY(-10px);
  }

  .page-contact .coop-tile__desc {
    grid-template-rows: 0fr;
  }

  .page-contact .coop-tile:hover .coop-tile__desc,
  .page-contact .coop-tile:focus-visible .coop-tile__desc,
  .page-contact .coop-tile:focus-within .coop-tile__desc {
    grid-template-rows: 1fr;
  }
}

/* ---------- 四种合作方式 ---------- */

.page-contact .coop-dirs {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 48px);
}

.page-contact .dir-row {
  display: grid;
  gap: 18px;
  padding: clamp(24px, 3vw, 38px) 0;
  border-top: 1px solid var(--coop-edge-soft);
}

.page-contact .dir-row:first-child {
  border-top-color: var(--coop-edge);
}

.page-contact .dir-row__head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.page-contact .dir-row__idx {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--violet);
}

.page-contact .dir-row__name {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(19px, 2.2vw, 26px);
  line-height: 1.3;
  letter-spacing: -.015em;
  color: var(--ice);
}

.page-contact .dir-row__text {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-contact .dir-meta {
  margin: 18px 0 0;
  display: grid;
  gap: 12px;
}

.page-contact .dir-meta > div {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 14px;
  align-items: start;
}

.page-contact .dir-meta dt {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-contact .dir-meta dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ice);
}

@media (min-width: 900px) {
  .page-contact .dir-row {
    grid-template-columns: minmax(200px, 3fr) minmax(0, 8fr);
    gap: clamp(24px, 4vw, 56px);
    align-items: start;
  }

  .page-contact .dir-row__head {
    flex-direction: column;
    gap: 8px;
    position: sticky;
    top: 96px;
  }
}

/* ---------- 接口与授权 ---------- */

.page-contact .api-grid {
  row-gap: 40px;
  align-items: start;
}

.page-contact .api-grid__main .section-head {
  margin-bottom: 0;
}

.page-contact .field-list {
  margin: clamp(24px, 3vw, 36px) 0 0;
  display: grid;
  gap: 0;
}

.page-contact .field-list__item {
  padding: 16px 0;
  border-bottom: 1px solid var(--coop-edge-soft);
  display: grid;
  gap: 6px;
}

.page-contact .field-list__item dt {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 16px;
  color: var(--ice);
}

.page-contact .field-list__code {
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan);
  padding: 3px 7px;
  background: rgba(52, 231, 228, .09);
  box-shadow: inset 0 0 0 1px rgba(52, 231, 228, .3);
}

.page-contact .field-list__item dd {
  margin: 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-contact .annot--rotated {
  display: inline-block;
  margin: 26px 0 0;
  transform: rotate(-9deg);
  transform-origin: left center;
  color: var(--violet);
}

.page-contact .api-grid__aside {
  display: grid;
  gap: 20px;
}

.page-contact .api-grid__aside .media-frame {
  aspect-ratio: 3 / 2;
  width: 100%;
}

.page-contact .api-grid__aside .media-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .api-note {
  margin: 0;
  padding-left: 16px;
  border-left: 2px solid var(--coop-edge);
  font-size: 13px;
  line-height: 1.85;
  color: var(--graphite);
}

/* ---------- 合作流程 ---------- */

.page-contact .flow-banner {
  margin: clamp(26px, 3.5vw, 44px) 0 0;
  position: relative;
  overflow: hidden;
  clip-path: polygon(32px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 32px);
}

.page-contact .flow-banner img {
  display: block;
  width: 100%;
  height: clamp(140px, 20vw, 240px);
  object-fit: cover;
  opacity: .78;
}

.page-contact .flow {
  list-style: none;
  position: relative;
  margin: clamp(28px, 4vw, 52px) 0 0;
  padding: 0;
  display: grid;
}

.page-contact .flow::before {
  content: "";
  position: absolute;
  left: 21px;
  top: 52px;
  bottom: 52px;
  width: 2px;
  background: linear-gradient(180deg, rgba(52, 231, 228, .55), rgba(124, 77, 255, .38) 55%, rgba(124, 77, 255, 0));
  transform: skewX(-4deg);
  transform-origin: top center;
  pointer-events: none;
}

.page-contact .flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 18px;
  padding: 24px 0;
  border-top: 1px dashed var(--coop-edge-soft);
}

.page-contact .flow__step:first-child {
  border-top: 0;
}

.page-contact .flow__num {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--cyan);
  background: rgba(52, 231, 228, .07);
  box-shadow: inset 0 0 0 1px rgba(52, 231, 228, .34);
  clip-path: polygon(10px 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%, 0 10px);
}

.page-contact .flow__main {
  min-width: 0;
}

.page-contact .flow__title {
  margin: 6px 0 0;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(17px, 1.8vw, 21px);
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .flow__text {
  margin: 10px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-contact .flow__main .note-toggle {
  margin-top: 14px;
}

.page-contact .flow__main .note-body {
  margin-top: 10px;
  max-width: 34em;
  font-size: 14px;
  line-height: 1.8;
  color: var(--graphite);
}

.page-contact .flow__main .note-body p {
  margin: 0;
}

@media (min-width: 900px) {
  .page-contact .flow__step {
    grid-template-columns: 72px 1fr;
    gap: clamp(24px, 3vw, 48px);
    padding: 30px 0;
  }

  .page-contact .flow::before {
    left: 35px;
    top: 60px;
    bottom: 60px;
  }

  .page-contact .flow__num {
    width: 56px;
    height: 56px;
    font-size: 14px;
    clip-path: polygon(14px 0, 100% 0, 100% calc(100% - 14px), calc(100% - 14px) 100%, 0 100%, 0 14px);
  }

  .page-contact .flow__main {
    display: grid;
    grid-template-columns: minmax(170px, 3fr) minmax(0, 8fr);
    gap: clamp(20px, 3vw, 44px);
    align-items: start;
  }

  .page-contact .flow__title {
    margin-top: 4px;
  }

  .page-contact .flow__text {
    margin-top: 4px;
  }

  .page-contact .flow__main .note-toggle,
  .page-contact .flow__main .note-body {
    grid-column: 2;
  }

  .page-contact .flow__main .note-toggle {
    margin-top: 12px;
    justify-self: start;
  }
}

/* ---------- 提交前准备 ---------- */

.page-contact .checklist {
  display: grid;
  gap: 0;
  margin-top: clamp(26px, 3.5vw, 44px);
}

.page-contact .checklist__item {
  display: grid;
  grid-template-columns: 46px 1fr;
  gap: 16px;
  align-items: start;
  padding: 22px 0;
  border-top: 1px solid var(--coop-edge-soft);
}

.page-contact .checklist__item:first-child {
  border-top-color: var(--coop-edge);
}

.page-contact .checklist__idx {
  padding-top: 4px;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .1em;
  color: var(--orange);
}

.page-contact .checklist__title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--ice);
}

.page-contact .checklist__text {
  margin: 8px 0 0;
  max-width: 32em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--graphite);
}

@media (min-width: 780px) {
  .page-contact .checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(32px, 5vw, 72px);
  }

  .page-contact .checklist__item:nth-child(2) {
    border-top-color: var(--coop-edge);
  }
}

/* ---------- 联系渠道 ---------- */

.page-contact .contact-card {
  position: relative;
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  padding: clamp(26px, 4vw, 52px);
  background: linear-gradient(155deg, rgba(30, 26, 51, .92), rgba(7, 6, 12, .94));
  box-shadow: inset 0 0 0 1px rgba(255, 122, 47, .46);
  clip-path: polygon(32px 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%, 0 32px);
}

.page-contact .contact-card__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(24px, 3.4vw, 40px);
  line-height: 1.16;
  letter-spacing: -.02em;
  color: var(--ice);
}

.page-contact .contact-card__text {
  margin: 16px 0 0;
  max-width: 32em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--graphite);
}

.page-contact .contact-card__mail {
  margin: 24px 0 0;
  font-family: var(--font-data);
  font-weight: 700;
  font-size: clamp(15px, 2vw, 21px);
  letter-spacing: .01em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .contact-card__hint {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--slate);
}

.page-contact .contact-list {
  margin: 0;
  display: grid;
  gap: 0;
  align-content: start;
}

.page-contact .contact-list__item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 16px;
  align-items: start;
  padding: 15px 0;
  border-top: 1px dashed var(--coop-edge-soft);
}

.page-contact .contact-list__item:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .contact-list dt {
  font-family: var(--font-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate);
  padding-top: 4px;
}

.page-contact .contact-list dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ice);
}

.page-contact .contact-list__num {
  font-family: var(--font-data);
  font-weight: 700;
  letter-spacing: .02em;
  color: var(--orange);
}

.page-contact .contact-foot {
  margin: clamp(24px, 3vw, 36px) 0 0;
  max-width: 44em;
  font-size: 14px;
  line-height: 1.9;
  color: var(--graphite);
}

.page-contact .contact-foot a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(52, 231, 228, .4);
  transition: border-color .25s ease, color .25s ease;
}

.page-contact .contact-foot a:hover,
.page-contact .contact-foot a:focus-visible {
  color: var(--ice);
  border-bottom-color: var(--magenta);
}

@media (min-width: 900px) {
  .page-contact .contact-card {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }
}
<<<END>>>