.page-contact .contact-hero {
  position: relative;
  padding-block: clamp(18px, 3vw, 34px) clamp(40px, 6vw, 76px);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(53, 224, 214, .10), transparent 55%),
    radial-gradient(90% 80% at 0% 100%, rgba(242, 160, 61, .10), transparent 60%),
    var(--ink);
  border-bottom: 1px solid var(--line-dark);
}

.page-contact .contact-hero .breadcrumbs {
  margin-bottom: clamp(20px, 3vw, 34px);
}

.page-contact .contact-hero__inner {
  display: grid;
  gap: clamp(24px, 4vw, 48px);
}

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

.page-contact .contact-hero__text h1 {
  margin: 10px 0 16px;
  font-size: clamp(30px, 5.2vw, 54px);
  line-height: 1.18;
  letter-spacing: -.01em;
  color: var(--warm-white);
}

.page-contact .contact-hero__text .lede {
  max-width: 60ch;
  color: rgba(244, 239, 230, .78);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.page-contact .contact-hero__quick {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 26px;
  margin: clamp(20px, 3vw, 30px) 0 0;
  padding: clamp(16px, 2.4vw, 22px) 0 0;
  border-top: 1px solid var(--line-dark);
  list-style: none;
}

.page-contact .contact-hero__quick li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 14px;
}

.page-contact .quick-key {
  color: var(--gray);
  letter-spacing: .06em;
}

.page-contact .contact-hero__quick .mono {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--warm-white);
}

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

.page-contact .contact-hero__media figcaption {
  margin-top: 10px;
}

/* 双轨联系台 */
.page-contact .contact-desk__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
}

.page-contact .contact-card {
  padding: clamp(22px, 3vw, 32px);
  border-left: 3px solid var(--cyan);
  box-shadow: var(--shadow-lift);
}

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

.page-contact .contact-card__title {
  margin: 8px 0 10px;
  font-size: clamp(22px, 2.6vw, 28px);
  color: var(--warm-white);
  line-height: 1.3;
}

.page-contact .contact-card__intro {
  margin: 0 0 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--gray-soft);
}

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

.page-contact .chan-item {
  display: grid;
  gap: 5px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line-dark);
}

.page-contact .chan-item:last-child {
  border-bottom: 0;
}

.page-contact .chan-key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gray);
  text-transform: uppercase;
}

.page-contact .chan-value {
  font-size: 16px;
  line-height: 1.6;
  color: var(--warm-white);
  word-break: break-word;
}

.page-contact .chan-value.mono {
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan);
  letter-spacing: -.005em;
}

.page-contact .chan-item:nth-child(2) .chan-value.mono {
  color: var(--amber);
}

.page-contact .contact-value--plain {
  font-size: 15px;
  color: rgba(244, 239, 230, .82);
}

.page-contact .contact-card__note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-dark);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--gray-soft);
}

/* 用途切换 */
.page-contact .topics .section-title {
  color: var(--warm-white);
}

.page-contact .topics__hint {
  margin: 8px 0 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--gray-soft);
}

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

.page-contact .tab {
  padding: 9px 16px;
  border: 1px solid var(--line-dark-strong);
  border-radius: var(--radius);
  background: transparent;
  color: var(--gray-soft);
  font-family: var(--font-sans);
  font-size: 14px;
  letter-spacing: .02em;
  cursor: pointer;
  transition: color .2s var(--ease), border-color .2s var(--ease), background-color .2s var(--ease);
}

.page-contact .tab:hover {
  color: var(--warm-white);
  border-color: var(--cyan);
}

.page-contact .tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .tab:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}

.page-contact .tabpanel {
  margin-top: 18px;
}

.page-contact .topic-lead {
  margin: 0 0 16px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink);
}

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

.page-contact .topic-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(11, 15, 18, .84);
}

.page-contact .topic-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--teal-link);
}

.page-contact .topic-foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-light);
  font-size: 14px;
  line-height: 1.7;
  color: var(--teal-ink);
}

.page-contact .inline-link {
  color: var(--teal-link);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

.page-contact .inline-link:hover {
  color: var(--vermilion);
}

/* 来信清单 */
.page-contact .band--prep {
  background: linear-gradient(180deg, rgba(20, 27, 33, .55), transparent 70%);
}

.page-contact .prep-card {
  padding: clamp(22px, 3.4vw, 40px);
  box-shadow: var(--shadow-paper);
}

.page-contact .eyebrow--dark {
  color: var(--vermilion);
}

.page-contact .section-title--dark {
  color: var(--ink);
}

.page-contact .prep-lead {
  margin: 10px 0 22px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 15, 18, .72);
}

.page-contact .prep-card .spec-caption {
  margin-bottom: 8px;
}

.page-contact .prep-card .spec-table th[scope="row"] {
  font-weight: 500;
  color: var(--teal-ink);
}

.page-contact .prep-card .spec-table td:last-child {
  color: rgba(11, 15, 18, .7);
}

.page-contact .prep-card .note {
  margin-top: 22px;
}

.page-contact .note .inline-link {
  color: var(--teal-link);
}

/* 项目与合作 */
.page-contact .coop__grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 46px);
}

.page-contact .coop__text .eyebrow {
  color: var(--amber);
}

.page-contact .coop__text .section-title {
  margin: 10px 0 16px;
  color: var(--warm-white);
}

.page-contact .coop__lead {
  margin: 0 0 24px;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(244, 239, 230, .76);
}

.page-contact .coop-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
}

.page-contact .coop-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-top: 1px solid var(--line-dark);
}

.page-contact .coop-num {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--amber);
  line-height: 1.6;
}

.page-contact .coop-title {
  margin: 0 0 5px;
  font-size: 17px;
  color: var(--warm-white);
}

.page-contact .coop-item p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--gray-soft);
}

.page-contact .coop__text .note {
  margin-top: 22px;
}

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

.page-contact .coop__media figcaption {
  margin-top: 10px;
}

/* 服务范围 */
.page-contact .band--scope .section-title {
  color: var(--warm-white);
}

.page-contact .scope-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
  margin-top: clamp(20px, 3vw, 30px);
}

.page-contact .scope-card {
  padding: clamp(20px, 3vw, 30px);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-dark);
  background: rgba(20, 27, 33, .8);
}

.page-contact .scope-card--ask {
  border-top: 3px solid var(--cyan);
}

.page-contact .scope-card--self {
  border-top: 3px solid var(--amber);
}

.page-contact .scope-title {
  margin: 14px 0 14px;
  font-size: clamp(18px, 2.2vw, 21px);
  color: var(--warm-white);
}

.page-contact .scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 11px;
}

.page-contact .scope-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(244, 239, 230, .76);
}

.page-contact .scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--gray);
}

.page-contact .scope-list .inline-link {
  color: var(--cyan);
  text-decoration-color: rgba(53, 224, 214, .5);
}

.page-contact .scope-card--self .scope-list .inline-link {
  color: var(--amber);
  text-decoration-color: rgba(242, 160, 61, .5);
}

.page-contact .scope-cta {
  display: grid;
  gap: 18px;
  margin-top: clamp(24px, 3.4vw, 38px);
  padding: clamp(20px, 3vw, 30px);
  border-left: 3px solid var(--vermilion);
}

.page-contact .scope-cta__text {
  margin: 0;
  max-width: 70ch;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 239, 230, .82);
}

.page-contact .scope-cta__mail {
  font-family: var(--font-mono);
  color: var(--cyan);
}

.page-contact .scope-cta__tel {
  font-family: var(--font-mono);
  color: var(--amber);
}

.page-contact .scope-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

  .page-contact .scope-cta {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, 1fr);
    align-items: center;
  }

  .page-contact .coop__grid {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-desk__grid {
    grid-template-columns: minmax(280px, 336px) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .contact-card {
    position: sticky;
    top: clamp(20px, 4vh, 40px);
  }
}

@media (max-width: 640px) {
  .page-contact .contact-hero__quick {
    flex-direction: column;
    gap: 10px;
  }

  .page-contact .coop-item {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 10px;
  }

  .page-contact .scope-cta__actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }
}
<<<END>>>