.page-contact {
  --ct-slant: 52px;
  --ct-hair: 2px;
  color: var(--ink);
}

/* ---------- 首屏切入带 ---------- */
.page-contact .page-hero.ct-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 6vw, 58px) 0 clamp(58px, 9vw, 96px);
  background: linear-gradient(152deg, var(--deep) 0%, var(--water) 100%);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--ct-slant)), 0 100%);
}

.page-contact .ct-hero::before {
  content: "";
  position: absolute;
  inset: -20% -10% auto auto;
  width: min(720px, 90%);
  aspect-ratio: 1 / 1;
  background: radial-gradient(circle at 70% 30%, var(--mist-b), transparent 62%);
  pointer-events: none;
}

.page-contact .ct-hero::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--cyan), transparent 70%);
  opacity: .7;
}

.page-contact .ct-hero__grid {
  position: relative;
  display: grid;
  gap: clamp(26px, 5vw, 46px);
  align-items: center;
}

.page-contact .ct-hero__copy h1 {
  margin: .28em 0 .18em;
  font-size: clamp(2.1rem, 7vw, 4.1rem);
  font-weight: 700;
  line-height: 1.02;
  letter-spacing: -.01em;
}

.page-contact .ct-hero__copy .eyebrow {
  color: var(--cyan);
}

.page-contact .ct-hero__copy .lede {
  max-width: 44ch;
  color: rgba(251, 250, 247, .88);
  font-size: clamp(1rem, 1.6vw, 1.12rem);
  line-height: 1.75;
}

.page-contact .ct-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 30px;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid rgba(191, 239, 232, .28);
}

.page-contact .ct-hero__facts li {
  display: grid;
  grid-template-columns: auto auto;
  grid-template-rows: auto auto;
  align-items: baseline;
  column-gap: 6px;
  min-width: 150px;
}

.page-contact .ct-fact__num {
  font-family: var(--font-mono);
  font-size: clamp(1.7rem, 4.4vw, 2.3rem);
  font-weight: 600;
  color: var(--cyan);
  line-height: 1;
}

.page-contact .ct-fact__label {
  grid-column: 1 / -1;
  margin-top: 6px;
  max-width: 22ch;
  font-size: .84rem;
  line-height: 1.6;
  color: rgba(251, 250, 247, .72);
}

.page-contact .ct-hero__plate {
  position: relative;
}

.page-contact .ct-hero__figure {
  margin: 0;
}

.page-contact .ct-hero__figure .plate__frame {
  overflow: hidden;
  border: 1px solid var(--mist-b);
  border-radius: var(--radius);
  background: var(--deep-b);
}

.page-contact .ct-hero__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .ct-hero__figure .plate__caption {
  margin-top: 10px;
  font-size: .82rem;
  line-height: 1.6;
  color: rgba(251, 250, 247, .7);
}

/* ---------- 区块标题 ---------- */
.page-contact .ct-band__head {
  max-width: 62ch;
}

.page-contact .ct-band__head h2 {
  margin: .18em 0 .5em;
  font-size: clamp(1.5rem, 3.4vw, 2.3rem);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.22;
}

.page-contact .ct-band__head .prose {
  color: var(--muted);
  line-height: 1.8;
}

.page-contact .section--deep .ct-band__head h2 {
  color: var(--paper);
}

.page-contact .section--deep .ct-band__head .prose {
  color: rgba(251, 250, 247, .78);
}

/* ---------- 协作矩阵 ---------- */
.page-contact .ct-matrix {
  margin: clamp(24px, 4vw, 38px) 0 0;
  display: grid;
  gap: var(--ct-hair);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
}

.page-contact .ct-matrix__head {
  display: none;
}

.page-contact .ct-matrix__row {
  display: block;
  background: var(--paper);
}

.page-contact .ct-matrix__name {
  display: block;
  padding: 14px 16px 8px;
  font-weight: 700;
  font-size: 1.02rem;
  background: var(--sand);
  border-left: 3px solid var(--cyan);
}

.page-contact .ct-matrix__cell {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 11px 16px;
  font-size: .93rem;
  line-height: 1.55;
  background: var(--paper);
  border-top: 1px solid var(--line);
}

.page-contact .ct-matrix__cell::before {
  content: attr(data-label);
  flex: 0 0 auto;
  min-width: 68px;
  font-size: .76rem;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-contact .ct-matrix__dot {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px var(--mist-a);
}

.page-contact .ct-matrix__cell--off .ct-matrix__dot {
  background: transparent;
  border: 2px solid var(--line);
  box-shadow: none;
}

.page-contact .ct-matrix__cell--off::before {
  color: var(--cinnabar);
}

.page-contact .ct-matrix-band .note {
  margin-top: 18px;
}

/* ---------- 联络渠道 ---------- */
.page-contact .ct-channels__grid {
  align-items: start;
}

.page-contact .ct-channels__body {
  min-width: 0;
}

.page-contact .ct-channels__list {
  margin: 0;
  border-top: 1px solid var(--line);
}

.page-contact .ct-channel {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .ct-channel dt {
  font-size: .78rem;
  letter-spacing: .05em;
  color: var(--muted);
}

.page-contact .ct-channel dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.6;
  word-break: break-word;
}

.page-contact .ct-channel dd .num {
  font-family: var(--font-mono);
  font-weight: 500;
  color: var(--water);
  font-size: 1.02rem;
}

.page-contact .ct-channels__figure {
  margin: clamp(24px, 4vw, 36px) 0 0;
}

.page-contact .ct-channels__figure .plate__frame {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--sand);
}

.page-contact .ct-channels__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .ct-channels__figure .plate__caption {
  margin-top: 10px;
  font-size: .82rem;
  line-height: 1.65;
  color: var(--muted);
}

.page-contact .ct-channels__body .prose {
  margin-top: 20px;
  line-height: 1.85;
}

/* ---------- 提交路径标签页 ---------- */
.page-contact .ct-tabs {
  margin-top: clamp(22px, 3.4vw, 32px);
}

.page-contact .ct-tabs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .ct-panel h3 {
  margin: 22px 0 .7em;
  font-size: clamp(1.15rem, 2.4vw, 1.4rem);
  font-weight: 700;
}

.page-contact .ct-panel .note {
  margin-top: 16px;
}

.page-contact .ct-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: ct-step;
  display: grid;
  gap: 12px;
  max-width: 68ch;
}

.page-contact .ct-steps li {
  position: relative;
  counter-increment: ct-step;
  padding-left: 46px;
  line-height: 1.8;
}

.page-contact .ct-steps li::before {
  content: counter(ct-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: .18em;
  padding: 2px 7px;
  font-family: var(--font-mono);
  font-size: .8rem;
  color: var(--water);
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.page-contact .ct-rules {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
  max-width: 68ch;
}

.page-contact .ct-rules li {
  position: relative;
  padding-left: 22px;
  line-height: 1.8;
}

.page-contact .ct-rules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 10px;
  height: 3px;
  border-radius: 2px;
  background: var(--cyan);
}

/* ---------- 校园与社群 ---------- */
.page-contact .ct-campus__grid {
  margin-top: clamp(22px, 3.4vw, 34px);
  display: grid;
  gap: 18px;
}

.page-contact .ct-support {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--sand);
  border-top: 3px solid var(--water);
}

.page-contact .ct-support h3 {
  margin: 0 0 .6em;
  font-size: 1.1rem;
  font-weight: 700;
}

.page-contact .ct-support p {
  margin: 0;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 回复节奏 ---------- */
.page-contact .ct-pace__bar {
  margin: clamp(24px, 4vw, 38px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-contact .ct-pace__item {
  padding: 20px 20px 22px;
}

.page-contact .ct-pace__item h3 {
  margin: 14px 0 .5em;
  font-size: 1.06rem;
  font-weight: 700;
}

.page-contact .ct-pace__item p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.78;
  color: rgba(251, 250, 247, .78);
}

.page-contact .ct-pace__tick {
  position: relative;
  display: block;
  height: 7px;
  border-radius: 999px;
  background: rgba(191, 239, 232, .2);
  overflow: hidden;
}

.page-contact .ct-pace__tick::after {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--cyan), var(--mist));
}

.page-contact .ct-pace__item--short .ct-pace__tick::after {
  width: 30%;
}

.page-contact .ct-pace__item--mid .ct-pace__tick::after {
  width: 58%;
  opacity: .82;
}

.page-contact .ct-pace__item--long .ct-pace__tick::after {
  width: 88%;
  opacity: .64;
}

.page-contact .ct-pace__note {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: .84rem;
  line-height: 1.75;
  color: rgba(251, 250, 247, .68);
  border-left: 2px solid var(--cyan);
  padding-left: 14px;
}

/* ---------- 索引带 ---------- */
.page-contact .ct-index__grid {
  align-items: start;
}

.page-contact .ct-index__list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.page-contact .ct-index__list a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 18px;
  padding: 14px 6px;
  border-bottom: 1px solid var(--line);
  color: var(--ink);
  text-decoration: none;
  transition: background-color 180ms var(--ease), color 180ms var(--ease);
}

.page-contact .ct-index__list a span:first-child {
  font-weight: 700;
  font-size: 1rem;
}

.page-contact .ct-index__desc {
  font-size: .84rem;
  color: var(--muted);
}

.page-contact .ct-index__list a:hover {
  background: var(--sand);
  color: var(--water);
}

.page-contact .ct-index__list a:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 悬停高亮（矩阵行） ---------- */
@media (hover: hover) {
  .page-contact .ct-matrix__row:hover .ct-matrix__name {
    background: var(--mist-a);
  }

  .page-contact .ct-matrix__row:hover .ct-matrix__cell {
    background: var(--sand);
  }

  .page-contact .ct-matrix__row:hover .ct-matrix__dot {
    transform: scale(1.15);
  }

  .page-contact .ct-matrix__dot {
    transition: transform 180ms var(--ease);
  }
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .ct-channel {
    grid-template-columns: 128px minmax(0, 1fr);
    align-items: baseline;
    gap: 0 20px;
  }

  .page-contact .ct-campus__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .ct-matrix__head,
  .page-contact .ct-matrix__row {
    display: grid;
    grid-template-columns: 1.15fr repeat(4, minmax(0, 1fr));
    gap: var(--ct-hair);
    background: var(--line);
  }

  .page-contact .ct-matrix__head {
    background: var(--deep);
  }

  .page-contact .ct-matrix__head span {
    padding: 12px 14px;
    font-size: .78rem;
    letter-spacing: .05em;
    color: var(--mist);
  }

  .page-contact .ct-matrix__name {
    display: flex;
    align-items: center;
    padding: 16px 14px;
    font-size: .98rem;
    border-left: 3px solid var(--cyan);
  }

  .page-contact .ct-matrix__cell {
    display: block;
    padding: 16px 14px;
    border-top: 0;
    font-size: .9rem;
  }

  .page-contact .ct-matrix__cell::before {
    display: block;
    min-width: 0;
    margin-bottom: 6px;
  }

  .page-contact .ct-pace__bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }
}

@media (min-width: 960px) {
  .page-contact .ct-hero__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: clamp(30px, 4vw, 56px);
  }

  .page-contact .ct-hero__plate {
    transform: rotate(-1.4deg) translateY(8px);
  }

  .page-contact .ct-channels__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr);
    gap: clamp(28px, 4vw, 56px);
  }

  .page-contact .ct-index__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 2.4fr);
    gap: clamp(28px, 4vw, 56px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-hero__plate {
    transform: none;
  }
}
</main>