.page-contact {
  --pc-error: #B8471A;
  --pc-panel: var(--surface);
  --pc-rule: var(--hairline);
  background: var(--paper);
  color: var(--text);
  font-family: var(--font-body);
}

.page-contact .breadcrumbs {
  padding: 18px 0 0;
  font-size: 13px;
}

.page-contact .hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  padding: 22px 0 clamp(32px, 5vw, 64px);
  align-items: start;
}

.page-contact .hero-intro h1 {
  margin: 12px 0 16px;
  font-family: var(--font-display);
  font-size: clamp(30px, 5.4vw, 54px);
  line-height: 1.16;
  letter-spacing: 0.02em;
  color: var(--c-green-deep);
  text-wrap: balance;
}

.page-contact .hero-jumps {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  border-top: 1px solid var(--pc-rule);
}

.page-contact .hero-jumps li {
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .hero-jumps a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 2px;
  font-size: 15px;
  color: var(--text);
  text-decoration: none;
  transition: color var(--dur) var(--ease), padding-left var(--dur) var(--ease);
}

.page-contact .hero-jumps a:hover,
.page-contact .hero-jumps a:focus-visible {
  color: var(--c-green-deep);
  padding-left: 10px;
}

.page-contact .hero-jumps a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.page-contact .hero-jumps .num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-blue);
}

/* 联系渠道面板 */
.page-contact .hero-channels {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: var(--c-green-deep);
  color: #FFFFFF;
  border: 1px solid var(--c-night);
}

.page-contact .channels-figure {
  margin: 0;
  height: 126px;
  background: linear-gradient(120deg, var(--c-night), var(--c-green-deep));
}

.page-contact .channels-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.5;
}

.page-contact .channels-body {
  padding: clamp(18px, 3vw, 28px);
}

.page-contact .channels-title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--c-mint);
}

.page-contact .channel-list {
  margin: 0;
  padding: 0;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.page-contact .channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 3px;
  padding: 13px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.18);
}

.page-contact .channel-row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.62);
}

.page-contact .channel-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.92);
}

.page-contact .channel-mono {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(16px, 3.4vw, 22px);
  line-height: 1.4;
  letter-spacing: 0.02em;
  color: var(--c-sand);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .channel-address {
  color: rgba(255, 255, 255, 0.88) !important;
}

.page-contact .channel-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.18);
}

.page-contact .copy-status {
  font-size: 12.5px;
  color: var(--c-mint);
  min-height: 1em;
}

/* 章节通用 */
.page-contact .section {
  padding: clamp(36px, 6vw, 72px) 0;
}

.page-contact .section--tint {
  background: var(--c-fog);
  border-top: 1px solid var(--pc-rule);
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .section-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: start;
  gap: 10px 18px;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .section-head-text h2 {
  margin: 6px 0 0;
  font-family: var(--font-display);
  font-size: clamp(24px, 3.6vw, 34px);
  line-height: 1.24;
  letter-spacing: 0.02em;
  color: var(--c-green-deep);
}

.page-contact .section-note {
  margin: 12px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-contact .section-note a {
  color: var(--c-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .section-note a:hover,
.page-contact .section-note a:focus-visible {
  color: var(--c-orange);
}

.page-contact .section-note--after {
  margin-top: 20px;
}

/* 咨询类型工作台 */
.page-contact .type-workbench {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  background: var(--pc-panel);
  border: 1px solid var(--pc-rule);
}

.page-contact .type-input {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: 1px;
  margin: 0;
  opacity: 0;
  pointer-events: none;
}

.page-contact .type-tabs {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .type-tab {
  flex: 1 1 auto;
  padding: 14px 12px;
  font-size: 14px;
  text-align: center;
  color: var(--text-muted);
  border-right: 1px solid var(--pc-rule);
  cursor: pointer;
  user-select: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .type-tab:last-of-type {
  border-right: 0;
}

.page-contact .type-tab:hover {
  background: var(--c-fog);
  color: var(--c-green-deep);
}

.page-contact #itype-service:checked ~ .type-tabs [for="itype-service"],
.page-contact #itype-coop:checked ~ .type-tabs [for="itype-coop"],
.page-contact #itype-data:checked ~ .type-tabs [for="itype-data"] {
  background: var(--brand);
  color: #FFFFFF;
}

.page-contact #itype-service:focus-visible ~ .type-tabs [for="itype-service"],
.page-contact #itype-coop:focus-visible ~ .type-tabs [for="itype-coop"],
.page-contact #itype-data:focus-visible ~ .type-tabs [for="itype-data"] {
  outline: 2px solid var(--focus-ring);
  outline-offset: -3px;
}

.page-contact .type-panel {
  display: none;
  padding: clamp(20px, 3vw, 30px);
}

.page-contact #itype-service:checked ~ .type-panels #panel-service,
.page-contact #itype-coop:checked ~ .type-panels #panel-coop,
.page-contact #itype-data:checked ~ .type-panels #panel-data {
  display: block;
}

.page-contact .panel-lead {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.75;
  color: var(--text);
}

.page-contact .prep-list {
  list-style: none;
  counter-reset: prep;
  margin: 16px 0 0;
  padding: 0;
  border-top: 1px solid var(--pc-rule);
}

.page-contact .prep-list li {
  counter-increment: prep;
  position: relative;
  padding: 11px 0 11px 34px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-muted);
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .prep-list li::before {
  content: counter(prep, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 11px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-green);
}

/* 草稿区 */
.page-contact .draft {
  padding: clamp(20px, 3vw, 30px);
  border-top: 1px solid var(--pc-rule);
  background: var(--c-fog);
}

.page-contact .draft h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.03em;
  color: var(--c-green-deep);
}

.page-contact .draft-note {
  margin: 8px 0 4px;
  max-width: 58ch;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-contact .field {
  margin-top: 16px;
}

.page-contact .field label {
  display: block;
  margin-bottom: 6px;
  font-size: 13px;
  letter-spacing: 0.03em;
  color: var(--c-green-deep);
}

.page-contact .field input {
  display: block;
  width: 100%;
  box-sizing: border-box;
  padding: 10px 12px;
  font: inherit;
  font-size: 15px;
  color: var(--text);
  background: var(--pc-panel);
  border: 1px solid var(--pc-rule);
  border-radius: 0;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}

.page-contact .field input:focus-visible {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px var(--focus-halo);
}

.page-contact .field input:user-invalid {
  border-color: var(--accent);
  box-shadow: inset 3px 0 0 var(--accent);
}

.page-contact .field-msg {
  margin: 6px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-muted);
}

.page-contact .field input:user-invalid ~ .field-msg {
  color: var(--pc-error);
}

.page-contact .draft-foot {
  margin: 18px 0 0;
  font-size: 13px;
  color: var(--text-muted);
}

.page-contact .draft-foot a {
  color: var(--c-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .draft-foot a:hover,
.page-contact .draft-foot a:focus-visible {
  color: var(--c-orange);
}

/* 反馈清单表 */
.page-contact .feedback-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--pc-panel);
  border: 1px solid var(--pc-rule);
}

.page-contact .feedback-table th,
.page-contact .feedback-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  font-size: 14.5px;
  line-height: 1.7;
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .feedback-table thead th {
  background: var(--c-green-deep);
  color: #FFFFFF;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  border-bottom: 0;
}

.page-contact .feedback-table tbody td:first-child {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-green-deep);
  white-space: nowrap;
}

.page-contact .feedback-table tbody td:nth-child(3) {
  color: var(--text-muted);
}

.page-contact .feedback-table tbody tr:last-child td {
  border-bottom: 0;
}

/* 合作区块 */
.page-contact .coop-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.page-contact .coop-figure {
  margin: 0;
  border: 1px solid var(--pc-rule);
  background: var(--pc-panel);
}

.page-contact .coop-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 10 / 7;
  object-fit: cover;
}

.page-contact .coop-figure figcaption {
  padding: 12px 16px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--text-muted);
  border-top: 1px solid var(--pc-rule);
}

.page-contact .coop-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--pc-rule);
}

.page-contact .coop-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .coop-num {
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-orange);
}

.page-contact .coop-item h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 17px;
  letter-spacing: 0.03em;
  color: var(--c-green-deep);
}

.page-contact .coop-item p {
  grid-column: 2;
  margin: 2px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-contact .coop-foot {
  margin: 18px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-contact .coop-foot a {
  color: var(--c-blue);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .coop-foot a:hover,
.page-contact .coop-foot a:focus-visible {
  color: var(--c-orange);
}

/* 回复流程 */
.page-contact .flow-list {
  list-style: none;
  counter-reset: flow;
  margin: 0;
  padding: 0;
  max-width: 72ch;
  border-top: 1px solid var(--pc-rule);
}

.page-contact .flow-list li {
  counter-increment: flow;
  position: relative;
  padding: 16px 0 16px 48px;
  font-size: 15px;
  line-height: 1.75;
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .flow-list li::before {
  content: counter(flow, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-orange);
}

.page-contact .next-links {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1px;
  margin-top: clamp(24px, 4vw, 36px);
  background: var(--pc-rule);
  border: 1px solid var(--pc-rule);
}

.page-contact .next-link {
  display: block;
  padding: 16px 18px;
  background: var(--pc-panel);
  color: var(--text);
  text-decoration: none;
  transition: background var(--dur) var(--ease);
}

.page-contact .next-link:hover,
.page-contact .next-link:focus-visible {
  background: var(--c-fog);
}

.page-contact .next-link:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: -3px;
}

.page-contact .next-link strong {
  display: block;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.03em;
  color: var(--c-green-deep);
}

.page-contact .next-link span {
  display: block;
  margin-top: 6px;
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--text-muted);
}

/* 断点 */
@media (min-width: 640px) {
  .page-contact .channel-row {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 46fr) minmax(0, 54fr);
    gap: 48px;
    padding-top: 34px;
  }

  .page-contact .channels-figure {
    height: 156px;
  }

  .page-contact .coop-grid {
    grid-template-columns: minmax(0, 40fr) minmax(0, 60fr);
    gap: 44px;
  }

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

  .page-contact .type-panels,
  .page-contact .draft {
    padding-inline: clamp(24px, 3vw, 34px);
  }
}

@media (max-width: 679px) {
  .page-contact .feedback-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip-path: inset(50%);
  }

  .page-contact .feedback-table,
  .page-contact .feedback-table tbody,
  .page-contact .feedback-table tr,
  .page-contact .feedback-table td {
    display: block;
    width: 100%;
  }

  .page-contact .feedback-table tr {
    padding: 4px 0;
    border-bottom: 1px solid var(--pc-rule);
  }

  .page-contact .feedback-table tbody tr:last-child {
    border-bottom: 0;
  }

  .page-contact .feedback-table td {
    padding: 6px 14px;
    border-bottom: 0;
  }

  .page-contact .feedback-table tbody td:first-child {
    padding-top: 12px;
    font-size: 14px;
    white-space: normal;
  }

  .page-contact .feedback-table td:nth-child(2)::before {
    content: "怎么填 · ";
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-muted);
  }

  .page-contact .feedback-table td:nth-child(3)::before {
    content: "用途 · ";
    font-family: var(--font-mono);
    font-size: 11.5px;
    color: var(--text-muted);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .hero-jumps a,
  .page-contact .type-tab,
  .page-contact .next-link,
  .page-contact .field input {
    transition: none;
  }
}
<<<END>>>
```