.page-contact {
  --pc-plate-line: rgba(26, 20, 16, .16);
  --pc-card-night: #0E2038;
  --pc-card-deep: #10243E;
  --pc-card-dusk: #150F2E;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  padding-top: clamp(36px, 6vw, 76px);
  padding-bottom: clamp(44px, 7vw, 84px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(58% 90% at 10% -12%, rgba(122, 91, 224, .22), transparent 68%),
    radial-gradient(46% 74% at 90% 2%, rgba(47, 182, 198, .14), transparent 70%);
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  max-width: 16ch;
  font-size: clamp(2.3rem, 6.4vw, 4.5rem);
  line-height: 1.03;
  letter-spacing: .03em;
  color: var(--sr-white);
}

.page-contact .contact-hero__lead {
  margin: clamp(20px, 3vw, 30px) 0 0;
  max-width: 58ch;
  color: var(--sr-silver);
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: clamp(24px, 3.5vw, 38px);
}

@media (min-width: 900px) {
  .page-contact .contact-hero__lead,
  .page-contact .contact-hero__meta {
    margin-left: 16.666%;
  }
}

/* ---------- 章节头 ---------- */
.page-contact .contact-sechead {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-contact .contact-sechead .sr-title {
  margin: 10px 0 0;
}

.page-contact .contact-sechead__note {
  margin-top: 16px;
  color: var(--sr-dim);
}

/* ---------- 三块协作面板 ---------- */
.page-contact .contact-collab {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-contact .contact-collab__card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 26px 22px 24px;
  border: 1px solid var(--sr-line);
  border-radius: var(--sr-radius);
  background: var(--pc-card-night);
  overflow: hidden;
  transition:
    transform .18s var(--sr-ease),
    border-color .18s var(--sr-ease),
    box-shadow .18s var(--sr-ease);
}

.page-contact .contact-collab__card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
}

.page-contact .contact-collab__card--media {
  background: linear-gradient(165deg, var(--pc-card-deep), #0A1728);
}

.page-contact .contact-collab__card--media::before {
  background: linear-gradient(90deg, var(--sr-dusk), rgba(122, 91, 224, 0) 72%);
}

.page-contact .contact-collab__card--campus {
  background: linear-gradient(165deg, var(--pc-card-night), #091624);
}

.page-contact .contact-collab__card--campus::before {
  background: linear-gradient(90deg, var(--sr-lake), rgba(47, 182, 198, 0) 72%);
}

.page-contact .contact-collab__card--reader {
  background: linear-gradient(165deg, var(--pc-card-dusk), #0A1424);
}

.page-contact .contact-collab__card--reader::before {
  background: linear-gradient(90deg, var(--sr-signal), rgba(255, 107, 44, 0) 72%);
}

.page-contact .contact-collab__card:hover,
.page-contact .contact-collab__card:focus-within {
  transform: translateY(-2px);
  border-color: rgba(255, 107, 44, .5);
  box-shadow: var(--sr-shadow);
}

.page-contact .contact-collab__card:focus-visible {
  outline: 2px solid var(--sr-lake);
  outline-offset: 2px;
}

.page-contact .contact-collab__title {
  margin: 12px 0 12px;
  font-family: var(--sr-display);
  font-size: clamp(1.15rem, 2.1vw, 1.45rem);
  line-height: 1.28;
  letter-spacing: .04em;
  color: var(--sr-white);
}

.page-contact .contact-collab__more {
  display: grid;
  grid-template-rows: 0fr;
  margin-top: 0;
  opacity: 0;
  transition:
    grid-template-rows .3s var(--sr-ease),
    opacity .3s var(--sr-ease),
    margin-top .3s var(--sr-ease);
}

.page-contact .contact-collab__more > div {
  overflow: hidden;
}

.page-contact .contact-collab__more .sr-text {
  padding-top: 14px;
  border-top: 1px dashed var(--sr-line);
  font-size: var(--sr-fs-sm);
  color: var(--sr-dim);
}

.page-contact .contact-collab__card:hover .contact-collab__more,
.page-contact .contact-collab__card:focus-within .contact-collab__more {
  grid-template-rows: 1fr;
  margin-top: 14px;
  opacity: 1;
}

@media (min-width: 760px) {
  .page-contact .contact-collab {
    grid-template-columns: 5fr 4fr;
  }

  .page-contact .contact-collab__card--reader {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1040px) {
  .page-contact .contact-collab {
    grid-template-columns: 5fr 4fr 3fr;
  }

  .page-contact .contact-collab__card--reader {
    grid-column: auto;
  }
}

@media (max-width: 759px) {
  .page-contact .contact-collab__more {
    grid-template-rows: 1fr;
    margin-top: 14px;
    opacity: 1;
  }
}

/* ---------- 联系铭牌 ---------- */
.page-contact .contact-plate {
  position: relative;
  max-width: 880px;
  overflow: hidden;
  border: 1px solid rgba(26, 20, 16, .16);
  border-radius: var(--sr-radius);
  background: var(--sr-cream);
  color: var(--sr-ink);
}

.page-contact .contact-plate__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .13;
  mix-blend-mode: multiply;
}

.page-contact .contact-plate__body {
  position: relative;
  z-index: 1;
  padding: clamp(26px, 4vw, 48px);
}

.page-contact .contact-plate__label {
  color: var(--sr-press);
  letter-spacing: .2em;
}

.page-contact .contact-plate__title {
  margin: 12px 0 0;
  color: var(--sr-ink);
  font-size: clamp(1.45rem, 3vw, 2rem);
  line-height: 1.2;
}

.page-contact .contact-plate__list {
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 0;
  border-top: 1px solid var(--pc-plate-line);
}

.page-contact .contact-plate__item {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--pc-plate-line);
}

.page-contact .contact-plate__key {
  font-family: var(--sr-display);
  font-size: var(--sr-fs-sm);
  letter-spacing: .16em;
  color: var(--sr-press);
}

.page-contact .contact-plate__val {
  font-size: var(--sr-fs-md);
  font-weight: 700;
  line-height: 1.4;
  color: var(--sr-ink);
  word-break: break-word;
}

.page-contact .contact-plate__val--mono {
  font-family: var(--sr-mono);
  font-size: var(--sr-fs-base);
  letter-spacing: .01em;
}

.page-contact .contact-plate__use {
  font-size: var(--sr-fs-sm);
  line-height: 1.75;
  color: rgba(26, 20, 16, .74);
  max-width: 58ch;
}

.page-contact .contact-plate__foot {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--sr-press);
  font-size: var(--sr-fs-sm);
  line-height: 1.75;
  color: rgba(26, 20, 16, .8);
}

@media (min-width: 700px) {
  .page-contact .contact-plate__item {
    grid-template-columns: 122px minmax(0, 1fr);
    align-items: baseline;
    gap: 6px 26px;
  }

  .page-contact .contact-plate__use {
    grid-column: 2;
  }
}

/* ---------- 准备清单 ---------- */
.page-contact .contact-brief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
}

.page-contact .contact-brief-grid .sr-title {
  margin: 10px 0 0;
}

.page-contact .contact-brief-intro .sr-text {
  margin-top: 16px;
  color: var(--sr-dim);
  max-width: 46ch;
}

.page-contact .contact-brief {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--sr-line-strong);
  border-radius: var(--sr-radius);
  background: rgba(14, 32, 56, .55);
  font-family: var(--sr-mono);
}

.page-contact .contact-brief li {
  display: grid;
  grid-template-columns: 14px minmax(0, 1fr);
  align-items: start;
  gap: 14px;
  padding: 15px 20px;
  border-bottom: 1px dashed var(--sr-line);
}

.page-contact .contact-brief li:last-child {
  border-bottom: 0;
}

.page-contact .contact-brief li::before {
  content: "";
  width: 12px;
  height: 12px;
  margin-top: 5px;
  border: 1px solid var(--sr-lake);
  border-radius: 2px;
  background: linear-gradient(135deg, rgba(47, 182, 198, .34), rgba(47, 182, 198, .04) 72%);
}

.page-contact .contact-brief__txt {
  font-size: var(--sr-fs-sm);
  line-height: 1.7;
  color: var(--sr-silver);
}

@media (min-width: 900px) {
  .page-contact .contact-brief-grid {
    grid-template-columns: 4fr 6fr;
    align-items: start;
  }
}

/* ---------- 推进流程 ---------- */
.page-contact .contact-flow {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 56px);
}

.page-contact .contact-flow__list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .contact-flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  padding-bottom: 30px;
}

.page-contact .contact-flow__step:last-child {
  padding-bottom: 0;
}

.page-contact .contact-flow__step:not(:last-child)::after {
  content: "";
  position: absolute;
  left: 25px;
  top: 30px;
  bottom: 4px;
  border-left: 1px dashed var(--sr-line-strong);
  opacity: .8;
}

.page-contact .contact-flow__num {
  position: relative;
  z-index: 1;
  font-family: var(--sr-mono);
  font-size: var(--sr-fs-sm);
  letter-spacing: .12em;
  color: var(--sr-signal);
  padding-top: 3px;
}

.page-contact .contact-flow__name {
  margin: 0 0 8px;
  font-family: var(--sr-display);
  font-size: var(--sr-fs-md);
  letter-spacing: .05em;
  color: var(--sr-white);
}

.page-contact .contact-flow__figure {
  margin: 0;
  overflow: hidden;
  border: 1px solid var(--sr-line);
  border-radius: var(--sr-radius);
  background: var(--sr-night);
}

.page-contact .contact-flow__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-contact .contact-flow__cap {
  padding: 14px 20px;
  border-top: 1px solid var(--sr-line-faint);
  font-size: var(--sr-fs-xs);
  line-height: 1.7;
  color: var(--sr-dim);
}

@media (min-width: 1000px) {
  .page-contact .contact-flow {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }
}

/* ---------- 回复节奏 ---------- */
.page-contact .contact-reply {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(18px, 3vw, 36px);
}

.page-contact .contact-reply__head .sr-title {
  margin: 10px 0 0;
}

.page-contact .contact-reply__body {
  display: grid;
  gap: 16px;
}

.page-contact .contact-reply__body .sr-text {
  margin: 0;
  max-width: 66ch;
  color: var(--sr-silver);
}

.page-contact .contact-reply__body .sr-note {
  margin: 4px 0 0;
  padding: 14px 18px;
  border: 1px dashed var(--sr-line-strong);
  border-radius: var(--sr-radius);
  background: rgba(14, 32, 56, .45);
}

@media (min-width: 900px) {
  .page-contact .contact-reply {
    grid-template-columns: 3fr 7fr;
    align-items: start;
  }

  .page-contact .contact-reply__body {
    padding-left: clamp(0px, 3vw, 34px);
    border-left: 1px solid var(--sr-line);
  }
}

/* ---------- 动效收敛 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-collab__card,
  .page-contact .contact-collab__more {
    transition: none;
  }

  .page-contact .contact-collab__card:hover,
  .page-contact .contact-collab__card:focus-within {
    transform: none;
  }
}
</main>