.page-contact {
  --ct-gap: clamp(18px, 3.4vw, 40px);
  --ct-pad: clamp(18px, 2.6vw, 30px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-contact .breadcrumb {
  margin-bottom: clamp(18px, 3vw, 34px);
}

/* ---------- 首屏 ---------- */
.page-contact .ct-hero {
  max-width: 920px;
}

.page-contact .ct-hero__title {
  font-size: clamp(2.3rem, 7vw, 5rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  font-weight: 200;
  color: var(--c-ice);
  margin: 14px 0 18px;
}

.page-contact .ct-hero__lede {
  color: var(--c-steel);
  max-width: 62ch;
  margin: 0;
}

/* ---------- 联系卡 ---------- */
.page-contact .ct-contact {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
  margin-top: clamp(26px, 4.5vw, 54px);
}

.page-contact .ct-mail {
  position: relative;
  padding: var(--ct-pad);
  background:
    linear-gradient(155deg, rgba(56, 242, 224, 0.12), rgba(10, 32, 56, 0.6) 52%),
    var(--c-glass);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-signal);
  border-radius: var(--radius);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.page-contact .ct-mail__addr {
  font-family: var(--font-mono);
  font-size: clamp(1.15rem, 5.2vw, 2.15rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: -0.02em;
  color: var(--c-cyan);
  margin: 12px 0 14px;
  word-break: break-all;
}

.page-contact .ct-mail__hint {
  color: var(--c-ice);
  font-size: 15px;
  line-height: 1.75;
  margin: 0;
  max-width: 54ch;
}

.page-contact .ct-mail__ver {
  font-family: var(--font-mono);
  font-size: 0.9em;
  font-weight: 700;
  color: var(--c-void);
  background: var(--c-ember);
  padding: 1px 7px;
  border-radius: 2px;
  white-space: nowrap;
}

.page-contact .ct-mail__points {
  list-style: none;
  margin: 22px 0 20px;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .ct-mail__points li {
  display: grid;
  grid-template-columns: 30px minmax(0, 1fr);
  gap: 8px;
  padding-top: 9px;
  border-top: 1px solid var(--c-line-soft);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--c-steel);
}

.page-contact .ct-mail__points .u-mono {
  color: var(--c-cyan);
  font-size: 11px;
  letter-spacing: 0.08em;
  padding-top: 2px;
}

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

/* ---------- 右侧图与信息砖 ---------- */
.page-contact .ct-side {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
  align-content: start;
}

.page-contact .ct-side__media {
  aspect-ratio: 10 / 7;
  margin: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.page-contact .ct-tiles {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

.page-contact .ct-tile {
  padding: 15px 18px;
  background: var(--c-midnight);
  border: 1px solid var(--c-line-soft);
  border-left: 2px solid var(--c-cyan);
  border-radius: var(--radius);
}

.page-contact .ct-tile__key {
  margin: 0 0 7px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-steel);
}

.page-contact .ct-tile__val {
  margin: 0 0 6px;
  font-size: 17px;
  line-height: 1.4;
  color: var(--c-ice);
  word-break: break-word;
}

.page-contact .ct-tile__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
  color: var(--c-steel);
}

/* ---------- 通用小节头 ---------- */
.page-contact .ct-collab,
.page-contact .ct-brief {
  margin-top: clamp(42px, 6.5vw, 80px);
}

.page-contact .ct-head {
  max-width: 680px;
}

.page-contact .ct-h2 {
  font-size: clamp(1.55rem, 4vw, 2.6rem);
  font-weight: 300;
  line-height: 1.14;
  letter-spacing: -0.02em;
  color: var(--c-ice);
  margin: 10px 0 12px;
}

.page-contact .ct-sub {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--c-steel);
  max-width: 62ch;
}

/* ---------- 横向标签带 ---------- */
.page-contact .ct-tabs {
  display: flex;
  gap: 10px;
  list-style: none;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: 6px 2px 14px;
  overflow-x: auto;
  scrollbar-width: thin;
  -webkit-overflow-scrolling: touch;
}

.page-contact .ct-tabs li {
  flex: 0 0 auto;
}

.page-contact .ct-tabs a {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 10px 20px 10px 16px;
  font-size: 14px;
  color: var(--c-ice);
  text-decoration: none;
  background: rgba(11, 32, 56, 0.85);
  border: 1px solid var(--c-line);
  clip-path: polygon(0 0, 100% 0, calc(100% - 12px) 100%, 0 100%);
  transition: background 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.page-contact .ct-tabs a .u-mono {
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--c-cyan);
}

.page-contact .ct-tabs a:hover,
.page-contact .ct-tabs a:focus-visible {
  background: rgba(56, 242, 224, 0.14);
  border-color: var(--c-cyan);
  color: var(--c-cyan-soft);
}

/* ---------- 合作卡片 ---------- */
.page-contact .ct-collab__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
  margin-top: 6px;
}

.page-contact .ct-card {
  position: relative;
  padding: var(--ct-pad);
  background: var(--c-midnight);
  border: 1px solid var(--c-line-soft);
  border-radius: var(--radius);
  scroll-margin-top: 92px;
}

.page-contact .ct-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 36%;
  height: 2px;
  background: linear-gradient(90deg, var(--c-cyan), transparent);
}

.page-contact .ct-card h3 {
  margin: 0 0 10px;
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--c-ice);
}

.page-contact .ct-card p {
  margin: 0 0 10px;
  font-size: 14px;
  line-height: 1.78;
  color: var(--c-steel);
}

.page-contact .ct-card .ct-card__need {
  margin: 0;
  padding-top: 11px;
  border-top: 1px dashed var(--c-line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--c-cyan-soft);
}

/* ---------- 提交清单 ---------- */
.page-contact .ct-brief {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--ct-gap);
  padding: clamp(20px, 3.2vw, 36px);
  background-color: var(--c-midnight);
  background-image:
    linear-gradient(var(--c-line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--c-line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

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

.page-contact .ct-checklist {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .ct-checklist li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 13px 15px;
  background: rgba(6, 17, 31, 0.78);
  border-left: 2px solid var(--c-line);
  transition: border-color 0.18s ease;
}

.page-contact .ct-checklist li:hover {
  border-left-color: var(--c-cyan);
}

.page-contact .ct-ck {
  appearance: none;
  -webkit-appearance: none;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--c-cyan);
  background: transparent;
  border-radius: 2px;
  cursor: pointer;
  flex: none;
}

.page-contact .ct-ck:checked {
  background: var(--c-cyan);
  box-shadow: inset 0 0 0 3px var(--c-void);
}

.page-contact .ct-ck:focus-visible {
  outline: 2px solid var(--c-ember);
  outline-offset: 2px;
}

.page-contact .ct-checklist label {
  display: block;
  cursor: pointer;
  min-width: 0;
}

.page-contact .ct-ck__t {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  color: var(--c-ice);
}

.page-contact .ct-ck__d {
  display: block;
  font-size: 13px;
  line-height: 1.68;
  color: var(--c-steel);
}

.page-contact .ct-brief__media {
  aspect-ratio: 3 / 2;
  margin: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
}

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

/* ---------- 收束 ---------- */
.page-contact .ct-next {
  margin-top: clamp(42px, 6.5vw, 80px);
  padding-top: clamp(24px, 4vw, 40px);
  border-top: 1px solid var(--c-line);
  max-width: 820px;
}

.page-contact .ct-next__links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 桌面 ---------- */
@media (min-width: 760px) {
  .page-contact .ct-contact {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    align-items: start;
  }

  .page-contact .ct-collab__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .ct-brief {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    align-items: start;
  }

  .page-contact .ct-brief__media {
    aspect-ratio: 4 / 5;
  }
}

@media (min-width: 1100px) {
  .page-contact .ct-hero__lede {
    font-size: 18px;
  }

  .page-contact .ct-side__media {
    aspect-ratio: 10 / 6.4;
  }

  .page-contact .ct-brief__media {
    aspect-ratio: 3 / 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-tabs a,
  .page-contact .ct-checklist li {
    transition: none;
  }
}
<<<END>>>