.page-contact {
  --pc-pad: clamp(20px, 5vw, 48px);
  background: var(--c-paper);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.7;
}

.page-contact h1,
.page-contact h2,
.page-contact h3,
.page-contact p,
.page-contact ul,
.page-contact ol,
.page-contact figure {
  margin: 0;
}

.page-contact a {
  color: inherit;
}

.page-contact .pc-wrap {
  width: 100%;
  max-width: var(--w-max);
  margin-inline: auto;
  padding-inline: var(--pc-pad);
}

.page-contact .mono {
  font-family: var(--font-mono);
}

.page-contact .breadcrumb {
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 18px var(--pc-pad) 0;
  font-size: var(--fs-small);
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .breadcrumb li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  color: rgba(7, 17, 15, 0.32);
}

.page-contact .breadcrumb a {
  color: rgba(7, 17, 15, 0.6);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-contact .breadcrumb a:hover {
  color: var(--c-ink);
  border-bottom-color: var(--c-orange);
}

.page-contact .breadcrumb li[aria-current="page"] {
  color: var(--c-ink);
  font-weight: 700;
}

/* 首屏 */
.page-contact .pc-hero {
  position: relative;
  margin-top: 18px;
  background: var(--c-deep);
  color: var(--c-text);
  overflow: hidden;
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(191, 232, 223, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(191, 232, 223, 0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  pointer-events: none;
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 84% 8%, rgba(41, 242, 208, 0.16), transparent 58%);
  pointer-events: none;
}

.page-contact .pc-hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 36px;
  max-width: var(--w-max);
  margin-inline: auto;
  padding: 40px var(--pc-pad) 52px;
}

.page-contact .kicker {
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--c-deep);
}

.page-contact .pc-hero .kicker,
.page-contact .pc-flow .kicker,
.page-contact .pc-faq .kicker {
  color: var(--c-cyan);
}

.page-contact h1 {
  margin-top: 16px;
  font-size: clamp(34px, 7.4vw, var(--fs-h1));
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -0.02em;
}

.page-contact .pc-lead {
  margin-top: 20px;
  max-width: 46ch;
  color: var(--c-text-dim);
  font-size: 15px;
}

.page-contact .pc-channels {
  margin-top: 30px;
  border-top: 1px solid var(--c-line-soft);
}

.page-contact .pc-channel {
  display: grid;
  gap: 3px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .pc-channel-label {
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .pc-channel-value {
  font-family: var(--font-mono);
  font-weight: 700;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.page-contact .pc-channel-value--mail {
  font-size: clamp(17px, 4.6vw, 24px);
}

.page-contact .pc-channel-value--tel {
  font-size: clamp(27px, 7.6vw, 42px);
  letter-spacing: 0.02em;
  color: var(--c-paper);
}

.page-contact .pc-channel-value--addr {
  font-family: var(--font-sans);
  font-size: clamp(16px, 4.2vw, 20px);
  letter-spacing: 0.01em;
}

.page-contact .pc-channel-note {
  font-size: var(--fs-small);
  color: var(--c-text-faint);
}

.page-contact .pc-hero-side {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .pc-hero-figure {
  aspect-ratio: 4 / 3;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--c-line-soft);
  background: var(--c-night);
}

.page-contact .pc-hero-figure img,
.page-contact .pc-response-figure img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .pc-status {
  display: grid;
  gap: 10px;
  padding: 14px 16px;
  border: 1px solid var(--c-line-soft);
  background: var(--c-night);
}

.page-contact .pc-status-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: var(--fs-tag);
  letter-spacing: 0.08em;
  color: var(--c-mist);
}

.page-contact .pc-status-row:first-child {
  justify-content: flex-start;
  color: var(--c-cyan);
}

.page-contact .pc-status-key {
  color: var(--c-text-faint);
}

.page-contact .pc-status-val {
  color: var(--c-text);
}

.page-contact .pc-lamp {
  flex: none;
  width: 8px;
  height: 8px;
  background: var(--c-cyan);
  box-shadow: 0 0 0 3px var(--c-cyan-glow);
}

.page-contact .pc-lamp--orange {
  margin-top: 8px;
  background: var(--c-orange);
  box-shadow: 0 0 0 3px rgba(255, 107, 53, 0.2);
}

/* 合作方向 */
.page-contact .pc-types {
  padding: 60px 0 64px;
  background: var(--c-paper);
}

.page-contact .pc-sec-head {
  max-width: 740px;
}

.page-contact h2 {
  margin-top: 14px;
  font-size: clamp(26px, 5.2vw, var(--fs-h2));
  font-weight: 800;
  line-height: 1.14;
  letter-spacing: -0.01em;
}

.page-contact .pc-sec-lead {
  margin-top: 14px;
  max-width: 60ch;
  font-size: 15px;
  color: rgba(7, 17, 15, 0.68);
}

.page-contact .pc-type-grid {
  margin-top: 34px;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line-ink);
}

.page-contact .pc-type {
  display: grid;
  gap: 9px;
  padding: 22px 0;
  border-bottom: 1px solid var(--c-line-ink);
}

.page-contact .pc-type-num {
  font-size: var(--fs-tag);
  letter-spacing: 0.18em;
  color: var(--c-orange);
}

.page-contact .pc-type h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
}

.page-contact .pc-type p {
  font-size: 15px;
  color: rgba(7, 17, 15, 0.72);
}

.page-contact .pc-type .pc-type-meta {
  font-size: var(--fs-tag);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(7, 17, 15, 0.48);
}

.page-contact .pc-type:hover h3 {
  text-decoration: underline;
  text-decoration-color: var(--c-orange);
  text-decoration-thickness: 2px;
  text-underline-offset: 6px;
}

/* 合作流程 */
.page-contact .pc-flow {
  position: relative;
  padding: 60px 0 68px;
  background: var(--c-night);
  color: var(--c-paper);
  overflow: hidden;
}

.page-contact .pc-flow::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(191, 232, 223, 0.06) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(191, 232, 223, 0.06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

.page-contact .pc-flow-inner {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 34px;
}

.page-contact .pc-flow h2 {
  color: var(--c-paper);
}

.page-contact .pc-flow-lead {
  margin-top: 14px;
  max-width: 42ch;
  font-size: 15px;
  color: var(--c-text-dim);
}

.page-contact .pc-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--c-line-soft);
}

.page-contact .pc-step {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .pc-step-num {
  font-size: 15px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
  padding-top: 2px;
}

.page-contact .pc-step h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-paper);
  margin-bottom: 5px;
}

.page-contact .pc-step p {
  font-size: 15px;
  color: var(--c-text-dim);
}

/* 响应节奏 */
.page-contact .pc-response {
  padding: 60px 0 64px;
  background: var(--c-paper);
}

.page-contact .pc-response-grid {
  display: grid;
  gap: 30px;
}

.page-contact .pc-response-lead {
  margin-top: 14px;
  max-width: 52ch;
  font-size: 15px;
  color: rgba(7, 17, 15, 0.7);
}

.page-contact .pc-response-list {
  list-style: none;
  margin: 24px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .pc-response-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line-ink);
  font-size: 15px;
  color: rgba(7, 17, 15, 0.76);
}

.page-contact .pc-response-list li:first-child {
  border-top: 1px solid var(--c-line-ink);
}

.page-contact .pc-link-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .pc-link-row a {
  display: inline-flex;
  align-items: center;
  padding: 10px 18px;
  border: 1px solid var(--c-ink);
  font-family: var(--font-mono);
  font-size: var(--fs-small);
  letter-spacing: 0.08em;
  color: var(--c-ink);
  text-decoration: none;
  transition: background var(--ease), color var(--ease), border-color var(--ease);
}

.page-contact .pc-link-row a:hover {
  background: var(--c-ink);
  color: var(--c-paper);
}

.page-contact .pc-response-figure {
  aspect-ratio: 3 / 2;
  width: 100%;
  overflow: hidden;
  border: 1px solid var(--c-line-ink);
  background: var(--c-night);
}

/* 提交前准备 */
.page-contact .pc-prep {
  padding: 60px 0 64px;
  background: var(--c-paper);
  border-top: 1px solid var(--c-line-ink);
}

.page-contact .pc-checklist {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line-ink);
}

.page-contact .pc-checklist li {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--c-line-ink);
}

.page-contact .pc-check {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 5px;
  border: 1px solid var(--c-ink);
}

.page-contact .pc-check::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 6px;
  height: 10px;
  border-right: 2px solid var(--c-orange);
  border-bottom: 2px solid var(--c-orange);
  transform: rotate(40deg);
}

.page-contact .pc-checklist h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.page-contact .pc-checklist p {
  font-size: 15px;
  color: rgba(7, 17, 15, 0.7);
}

/* 常见问题与站内索引 */
.page-contact .pc-faq {
  padding: 60px 0 68px;
  background: var(--c-deep);
  color: var(--c-text);
}

.page-contact .pc-faq-grid {
  display: grid;
  gap: 38px;
}

.page-contact .pc-faq h2 {
  color: var(--c-paper);
}

.page-contact .pc-qa {
  margin-top: 22px;
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .pc-qa:first-of-type {
  border-top: 1px solid var(--c-line-soft);
}

.page-contact .pc-qa summary {
  position: relative;
  padding: 17px 36px 17px 0;
  font-size: 16px;
  font-weight: 700;
  color: var(--c-paper);
  cursor: pointer;
  list-style: none;
}

.page-contact .pc-qa summary::-webkit-details-marker {
  display: none;
}

.page-contact .pc-qa summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.4;
  color: var(--c-cyan);
}

.page-contact .pc-qa[open] summary::after {
  content: "–";
}

.page-contact .pc-qa summary:hover {
  color: var(--c-cyan);
}

.page-contact .pc-qa p {
  margin: 0 0 18px;
  max-width: 64ch;
  font-size: 15px;
  color: var(--c-text-dim);
}

.page-contact .pc-index {
  align-self: start;
  padding: 22px 20px;
  border: 1px solid var(--c-line-soft);
  background: var(--c-night);
}

.page-contact .pc-index-title {
  margin: 0 0 12px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-paper);
}

.page-contact .pc-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
}

.page-contact .pc-index-list li {
  border-top: 1px solid var(--c-line-soft);
}

.page-contact .pc-index-list a {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr);
  gap: 10px;
  padding: 13px 0;
  font-size: 14px;
  line-height: 1.55;
  color: var(--c-mist);
  text-decoration: none;
  transition: color var(--ease);
}

.page-contact .pc-index-list a span {
  font-size: var(--fs-tag);
  letter-spacing: 0.12em;
  color: var(--c-cyan);
  padding-top: 3px;
}

.page-contact .pc-index-list a:hover {
  color: var(--c-paper);
}

/* 焦点反馈 */
.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--c-deep);
  outline-offset: 2px;
}

.page-contact .pc-hero a:focus-visible,
.page-contact .pc-flow a:focus-visible,
.page-contact .pc-faq a:focus-visible,
.page-contact .pc-faq summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

@media (min-width: 720px) {
  .page-contact .pc-type-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }

  .page-contact .pc-type {
    padding: 24px 0 26px;
  }

  .page-contact .pc-checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 48px;
  }

  .page-contact .pc-hero-figure {
    aspect-ratio: 16 / 10;
  }
}

@media (min-width: 1000px) {
  .page-contact .pc-hero-inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
    align-items: start;
    padding: 68px var(--pc-pad) 84px;
  }

  .page-contact .pc-hero-figure {
    aspect-ratio: 4 / 5;
  }

  .page-contact .pc-lead {
    font-size: 16px;
  }

  .page-contact .pc-types,
  .page-contact .pc-response,
  .page-contact .pc-prep {
    padding: 88px 0;
  }

  .page-contact .pc-flow,
  .page-contact .pc-faq {
    padding: 92px 0;
  }

  .page-contact .pc-flow-inner {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 64px;
    align-items: start;
  }

  .page-contact .pc-response-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 56px;
    align-items: center;
  }

  .page-contact .pc-faq-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 64px;
    align-items: start;
  }

  .page-contact .pc-type-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 36px;
  }

  .page-contact .pc-step {
    padding: 20px 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-link-row a,
  .page-contact .pc-index-list a {
    transition: none;
  }
}
<<<END>>>