.page-contact {
  background: var(--ink);
  color: var(--bone);
  font-family: var(--font-body);
  padding-top: var(--header-h);
  overflow-x: hidden;
}

/* ---------- 首屏：展开的合作案卷 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: 1.4rem 0 clamp(2.5rem, 7vw, 4.5rem);
  background:
    radial-gradient(120% 90% at 88% -10%, rgba(53, 214, 232, 0.11), transparent 58%),
    radial-gradient(100% 80% at -5% 110%, rgba(255, 106, 42, 0.09), transparent 55%),
    repeating-linear-gradient(112deg, rgba(167, 176, 184, 0.055) 0 1px, transparent 1px 44px),
    var(--ink);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--orange), var(--cyan) 55%, transparent);
}

.page-contact .breadcrumb {
  margin-bottom: clamp(1rem, 3vw, 1.6rem);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
}

.page-contact .dossier {
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
}

.page-contact .dossier__leaf {
  padding: clamp(1.2rem, 3.4vw, 2.5rem);
  background: var(--slate);
  min-width: 0;
}

.page-contact .dossier__leaf--support {
  display: flex;
  flex-direction: column;
  gap: 0.9rem;
  background: linear-gradient(180deg, var(--stratum) 0%, var(--slate) 100%);
}

.page-contact .dossier__stamp {
  margin: 0 0 0.9rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-contact .dossier__leaf--biz h1 {
  margin: 0 0 1rem;
  font-family: var(--font-display);
  font-size: clamp(1.65rem, 5.2vw, 2.9rem);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.015em;
  color: var(--bone);
}

.page-contact .dossier__lede {
  margin: 0 0 1.5rem;
  max-width: 34em;
  font-size: clamp(0.92rem, 2.2vw, 1.02rem);
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .dossier__index {
  list-style: none;
  margin: 0 0 1.6rem;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-contact .dossier__index a {
  display: flex;
  align-items: baseline;
  gap: 0.85rem;
  padding: 0.66rem 0.9rem;
  background: var(--ink);
  color: var(--bone);
  text-decoration: none;
  font-size: 0.9rem;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), padding-left 0.2s var(--ease);
}

.page-contact .dossier__index a:hover,
.page-contact .dossier__index a:focus-visible {
  background: var(--stratum);
  padding-left: 1.3rem;
  color: var(--cyan);
}

.page-contact .dossier__index .idx {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-contact .dossier__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem;
}

.page-contact .dossier__figure {
  margin: 0;
}

.page-contact .support-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.page-contact .support-card__note {
  margin: 0;
  font-size: 0.82rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .support-card__list {
  margin: 0;
  display: grid;
  gap: 0.7rem;
}

.page-contact .support-card__row {
  display: grid;
  gap: 0.3rem;
  padding-top: 0.7rem;
  border-top: 1px solid var(--line-soft);
  min-width: 0;
}

.page-contact .support-card__row dt {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .support-card__row dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--bone);
  overflow-wrap: anywhere;
}

/* ---------- 复制按钮 ---------- */
.page-contact .copy-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  padding: 0.26rem 0.55rem;
  border: 1px solid var(--line-cyan);
  background: transparent;
  color: var(--cyan);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  background: var(--cyan);
  color: var(--ink);
  border-color: var(--cyan);
}

.page-contact .copy-btn[data-copied] {
  border-color: var(--moss);
  background: rgba(110, 139, 116, 0.18);
  color: var(--moss);
}

/* ---------- 图像容器 ---------- */
.page-contact .media-frame {
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  background: var(--ink);
  min-width: 0;
}

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

.page-contact .media-frame__label {
  display: block;
  padding: 0.5rem 0.7rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--mist);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 通用板块骨架 ---------- */
.page-contact .biz-tracks,
.page-contact .support,
.page-contact .process,
.page-contact .reach {
  padding: clamp(2.25rem, 6.5vw, 4.5rem) 0;
}

.page-contact .biz-tracks {
  background: var(--slate);
}

.page-contact .support {
  background: var(--ink);
}

.page-contact .process {
  background: linear-gradient(180deg, var(--slate) 0%, var(--ink) 100%);
}

.page-contact .reach {
  background: var(--ink);
  padding-bottom: clamp(3rem, 8vw, 5.5rem);
}

.page-contact .section-head {
  margin-bottom: clamp(1.4rem, 4vw, 2.4rem);
  max-width: 46rem;
}

.page-contact .section-kicker {
  margin: 0 0 0.6rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .section-kicker::before {
  content: "";
  display: inline-block;
  width: 22px;
  height: 2px;
  margin-right: 0.6rem;
  background: var(--orange);
  vertical-align: middle;
}

.page-contact h2 {
  margin: 0 0 0.65rem;
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 3.6vw, 1.95rem);
  font-weight: 800;
  line-height: 1.22;
  color: var(--bone);
}

.page-contact .section-lede {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.8;
  color: var(--mist);
}

/* ---------- 合作方向卡片 ---------- */
.page-contact .track-grid {
  display: grid;
  gap: clamp(0.85rem, 2vw, 1.15rem);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .track-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0.55rem;
  padding: clamp(1.05rem, 2.6vw, 1.55rem);
  background: var(--ink);
  border: 2px solid var(--line);
  box-shadow: var(--shadow-hard);
  outline: none;
  min-width: 0;
  transition: transform 0.22s var(--ease), border-color 0.22s var(--ease), box-shadow 0.22s var(--ease);
}

.page-contact .track-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 4px;
  background: var(--orange);
}

.page-contact .track-card:nth-child(1)::before { background: var(--orange); }
.page-contact .track-card:nth-child(2)::before { background: var(--cyan); }
.page-contact .track-card:nth-child(3)::before { background: var(--moss); }
.page-contact .track-card:nth-child(4)::before { background: var(--clay); }

.page-contact .track-card:hover,
.page-contact .track-card:focus,
.page-contact .track-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--line-cyan);
  box-shadow: var(--shadow-hard), 0 0 0 1px var(--line-cyan);
}

.page-contact .track-card__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--mist);
}

.page-contact .track-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 800;
  color: var(--bone);
}

.page-contact .track-card__fit {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 0.74rem;
  line-height: 1.65;
  letter-spacing: 0.02em;
  color: var(--cyan);
}

.page-contact .track-card__text {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .track-card__more {
  margin: 0;
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  font-size: 0.83rem;
  line-height: 1.75;
  color: var(--bone);
  border-top: 1px dashed var(--line);
  padding-top: 0;
  transition: max-height 0.3s var(--ease), opacity 0.24s var(--ease),
    padding-top 0.3s var(--ease), margin-top 0.3s var(--ease);
}

.page-contact .track-card:hover .track-card__more,
.page-contact .track-card:focus .track-card__more,
.page-contact .track-card:focus-within .track-card__more {
  max-height: 15rem;
  opacity: 1;
  padding-top: 0.65rem;
  margin-top: 0.2rem;
}

/* ---------- 客服与技术支持 ---------- */
.page-contact .support__grid {
  display: grid;
  gap: clamp(1.5rem, 4vw, 2.6rem);
  grid-template-columns: minmax(0, 1fr);
  align-items: start;
}

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

.page-contact .support__text {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .support__steps {
  list-style: none;
  margin: 1.3rem 0 1.2rem;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border-left: 3px solid var(--cyan);
}

.page-contact .support__steps li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.8rem;
  align-items: baseline;
  padding: 0.72rem 0.9rem;
  background: var(--slate);
  font-size: 0.87rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .support__steps .step-no {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  color: var(--orange);
}

.page-contact .support__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem;
  margin: 0;
}

.page-contact .support__links a {
  display: inline-flex;
  align-items: center;
  padding: 0.52rem 0.95rem;
  border: 1px solid var(--line-cyan);
  color: var(--cyan);
  text-decoration: none;
  font-size: 0.83rem;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .support__links a:hover,
.page-contact .support__links a:focus-visible {
  background: var(--cyan);
  color: var(--ink);
}

.page-contact .support__figure {
  margin: 0;
}

/* ---------- 合作流程 ---------- */
.page-contact .process__jump {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 1.3rem;
}

.page-contact .process__jump a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  padding: 0.4rem 0.72rem;
  border: 1px solid var(--line);
  color: var(--mist);
  text-decoration: none;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-contact .process__jump a:hover,
.page-contact .process__jump a:focus-visible {
  border-color: var(--orange);
  color: var(--orange);
  background: rgba(255, 106, 42, 0.08);
}

.page-contact .process__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.9rem;
}

.page-contact .process__step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0.85rem;
  padding: 1rem 1.1rem;
  background: var(--ink);
  border: 1px solid var(--line);
  border-left: 3px solid var(--orange);
  scroll-margin-top: calc(var(--header-h) + 1.5rem);
  transition: border-color 0.2s var(--ease), background 0.2s var(--ease);
}

.page-contact .process__step:hover {
  border-left-color: var(--cyan);
  background: var(--slate);
}

.page-contact .process__num {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  letter-spacing: 0.08em;
  color: var(--orange);
}

.page-contact .process__step h3 {
  margin: 0 0 0.32rem;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 800;
  color: var(--bone);
}

.page-contact .process__step p {
  margin: 0;
  font-size: 0.87rem;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 联系信息：米白阅读卡 ---------- */
.page-contact .reach-card {
  background: var(--bone);
  color: var(--ink);
  border: 2px solid var(--ink);
  box-shadow: 10px 10px 0 rgba(255, 106, 42, 0.55);
  padding: clamp(1.3rem, 4vw, 2.9rem);
}

.page-contact .reach-card .section-kicker {
  color: var(--clay);
}

.page-contact .reach-card .section-kicker::before {
  background: var(--clay);
}

.page-contact .reach-card h2 {
  color: var(--ink);
}

.page-contact .reach__grid {
  margin: 1.4rem 0 1.2rem;
  display: grid;
  gap: 1px;
  background: rgba(11, 14, 17, 0.2);
  border: 1px solid rgba(11, 14, 17, 0.2);
}

.page-contact .reach__item {
  background: var(--bone);
  padding: 0.85rem 1rem;
  display: grid;
  gap: 0.3rem;
  min-width: 0;
}

.page-contact .reach__item dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-contact .reach__item dd {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.94rem;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .reach__item dd span {
  font-family: var(--font-mono);
  letter-spacing: 0.01em;
}

.page-contact .reach-card .copy-btn {
  border-color: rgba(11, 14, 17, 0.4);
  color: var(--ink);
}

.page-contact .reach-card .copy-btn:hover,
.page-contact .reach-card .copy-btn:focus-visible {
  background: var(--ink);
  color: var(--bone);
  border-color: var(--ink);
}

.page-contact .reach__note {
  margin: 0 0 0.8rem;
  font-size: 0.87rem;
  line-height: 1.78;
  color: var(--stratum);
}

.page-contact .reach__links {
  display: flex;
  flex-wrap: wrap;
  gap: 0.7rem 1.4rem;
  margin: 1.2rem 0 0;
  padding-top: 1rem;
  border-top: 1px solid rgba(11, 14, 17, 0.2);
}

.page-contact .reach__links a {
  color: var(--ink);
  font-size: 0.86rem;
  text-decoration: underline;
  text-decoration-color: var(--orange);
  text-decoration-thickness: 2px;
  text-underline-offset: 4px;
  transition: color 0.2s var(--ease);
}

.page-contact .reach__links a:hover,
.page-contact .reach__links a:focus-visible {
  color: var(--clay);
}

/* ---------- 焦点可见性 ---------- */
.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact [tabindex]:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-contact .track-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-contact .process__step:nth-child(even) {
    margin-left: 2rem;
  }

  .page-contact .process__step:nth-child(odd) {
    margin-right: 2rem;
  }
}

@media (min-width: 960px) {
  .page-contact .dossier {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  }

  .page-contact .support__grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-contact .contact-hero {
    padding-top: 2rem;
  }
}

@media (hover: none) {
  .page-contact .track-card__more {
    max-height: 20rem;
    opacity: 1;
    padding-top: 0.65rem;
    margin-top: 0.2rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .page-contact .track-card:hover,
  .page-contact .track-card:focus,
  .page-contact .track-card:focus-within {
    transform: none;
  }
}
<<<END>>>