/* ===== 合作与联系 · 页面专属样式（作用域 .page-contact） ===== */
.page-contact {
  --pc-hair: 1px solid var(--ink-600);
  --pc-soft: 1px solid rgba(6, 18, 15, 0.18);
  display: block;
  background: var(--ink-900);
  color: var(--gry-300);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  padding-bottom: 72px;
  overflow-wrap: break-word;
}

.page-contact .wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 20px 20px 0;
}

/* --- 面包屑 --- */
.page-contact .breadcrumb {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}
.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 0 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink-600);
}
.page-contact .breadcrumb a {
  color: var(--gry-500);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--cy-500);
  border-bottom-color: var(--cy-500);
}

/* --- 首屏 --- */
.page-contact .contact-hero {
  display: grid;
  gap: 14px;
  margin-top: 18px;
  padding-top: 20px;
  border-top: var(--pc-hair);
}
.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}
.page-contact .eyebrow {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}
.page-contact .contact-hero__coord {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--or-500);
}
.page-contact h1 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 8vw, 40px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--gry-300);
}
.page-contact .contact-hero__lede {
  margin: 0;
  max-width: 64ch;
  font-size: 15.5px;
  color: var(--gry-300);
}

.page-contact .hero-metrics {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1px;
  margin: 4px 0 0;
  padding: 0;
  list-style: none;
  background: var(--ink-600);
  border: var(--pc-hair);
}
.page-contact .hero-metrics__item {
  display: grid;
  gap: 3px;
  padding: 10px 10px 12px;
  background: var(--ink-900);
}
.page-contact .hero-metrics__num {
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.3;
  color: var(--cy-500);
  font-variant-numeric: tabular-nums;
}
.page-contact .hero-metrics__item--signal .hero-metrics__num {
  color: var(--or-500);
}
.page-contact .hero-metrics__label {
  font-size: 12px;
  line-height: 1.5;
  color: var(--gry-500);
}

/* --- 反白速览卡（全页唯一一次米白底） --- */
.page-contact .contact-plate {
  display: grid;
  gap: 14px;
  margin-top: 26px;
  padding: 18px 16px 20px;
  background: var(--paper-100);
  color: var(--ink-900);
  border-top: 3px solid var(--or-500);
}
.page-contact .contact-plate .card__coord {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-600);
}
.page-contact .contact-plate__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(20px, 5.4vw, 26px);
  line-height: 1.15;
  letter-spacing: -0.01em;
  color: var(--ink-900);
}
.page-contact .contact-plate__grid {
  display: grid;
  gap: 16px;
}
.page-contact .contact-plate__item {
  display: grid;
  gap: 4px;
  padding-top: 10px;
  border-top: var(--pc-soft);
}
.page-contact .contact-plate__key {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-600);
}
.page-contact .contact-plate__val {
  font-size: 16px;
  line-height: 1.55;
  color: var(--ink-900);
}
.page-contact .contact-plate__val.mono {
  font-family: var(--font-mono);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}
.page-contact .contact-plate__hint {
  font-size: 13px;
  color: var(--ink-600);
}
.page-contact .copy-btn {
  justify-self: start;
  margin-top: 4px;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--ink-900);
  background: transparent;
  border: 1px solid var(--or-500);
  border-radius: 0;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .copy-btn:hover {
  background: var(--or-500);
  color: var(--paper-100);
}
.page-contact .copy-btn:focus-visible {
  outline: 1px solid var(--or-500);
  outline-offset: 2px;
}
.page-contact .copy-btn[data-copied] {
  background: var(--ink-800);
  border-color: var(--ink-800);
  color: var(--cy-500);
}

/* --- 主体分栏 --- */
.page-contact .contact-layout {
  display: grid;
  gap: 28px;
  margin-top: 32px;
}
.page-contact .contact-main {
  min-width: 0;
  display: block;
}

/* --- 左侧索引 --- */
.page-contact .channel-index {
  display: grid;
  gap: 14px;
  align-content: start;
}
.page-contact .channel-index__title {
  margin: 0;
  padding-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
  border-bottom: var(--pc-hair);
}
.page-contact .channel-index__list {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--ink-600);
  border: var(--pc-hair);
}
.page-contact .channel-index__list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 10px 12px;
  background: var(--ink-900);
  color: var(--gry-300);
  font-size: 14px;
  text-decoration: none;
  border-left: 2px solid transparent;
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-contact .channel-index__list a:hover,
.page-contact .channel-index__list a:focus-visible {
  background: var(--ink-800);
  border-left-color: var(--cy-500);
  color: var(--cy-200);
}
.page-contact .channel-index__list .mono {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cy-500);
  font-variant-numeric: tabular-nums;
}

/* --- 章节骨架 --- */
.page-contact .section {
  margin-top: 0;
}
.page-contact .section + .section {
  margin-top: 44px;
}
.page-contact .section__head {
  display: grid;
  gap: 8px;
  padding-top: 16px;
  border-top: var(--pc-hair);
}
.page-contact h2 {
  margin: 0;
  padding-left: 12px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(20px, 5.2vw, 25px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--gry-300);
  border-left: 2px solid var(--cy-500);
}
.page-contact h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 18px;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--gry-300);
}
.page-contact p {
  margin: 14px 0 0;
  max-width: 70ch;
  font-size: 15.5px;
}
.page-contact a {
  color: var(--cy-200);
  text-decoration: none;
  border-bottom: 1px solid var(--ink-600);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact a:hover,
.page-contact a:focus-visible {
  color: var(--cy-500);
  border-bottom-color: var(--cy-500);
}
.page-contact .dim {
  color: var(--gry-500);
}
.page-contact .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* --- 图像容器 --- */
.page-contact .media {
  margin: 18px 0 0;
  border: var(--pc-hair);
  background: var(--ink-800);
}
.page-contact .media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .media__cap {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  line-height: 1.6;
  color: var(--gry-500);
  border-top: var(--pc-hair);
}

/* --- 渠道表 --- */
.page-contact .table-wrap {
  margin-top: 18px;
  border: var(--pc-hair);
  overflow-x: auto;
}
.page-contact .data-table {
  width: 100%;
  min-width: 600px;
  border-collapse: collapse;
  font-size: 14.5px;
}
.page-contact .data-table caption {
  padding: 10px 12px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
  border-bottom: var(--pc-hair);
}
.page-contact .data-table th,
.page-contact .data-table td {
  padding: 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: var(--pc-hair);
}
.page-contact .data-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--gry-500);
  background: var(--ink-800);
  white-space: nowrap;
}
.page-contact .data-table tbody tr {
  transition: background-color var(--dur) var(--ease);
}
.page-contact .data-table tbody tr:hover {
  background: var(--ink-800);
}
.page-contact .data-table tbody tr:target {
  background: var(--ink-800);
  box-shadow: inset 2px 0 0 var(--cy-500);
}
.page-contact .data-table tbody tr:last-child td {
  border-bottom: 0;
}
.page-contact .data-table .col-coord,
.page-contact .data-table td.num {
  width: 66px;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cy-500);
}
.page-contact .ch-name {
  display: block;
  font-family: var(--font-display);
  font-size: 16px;
  letter-spacing: 0.01em;
  color: var(--gry-300);
}
.page-contact .ch-val {
  display: block;
  margin-top: 2px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--cy-200);
  word-break: break-word;
}
.page-contact .ch-val.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

/* --- 说明条 --- */
.page-contact .note {
  margin-top: 16px;
  padding: 12px 14px;
  background: var(--ink-800);
  border-left: 2px solid var(--cy-500);
}
.page-contact .note--signal {
  border-left-color: var(--or-500);
}
.page-contact .note__label {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cy-500);
}
.page-contact .note--signal .note__label {
  color: var(--or-200);
}
.page-contact .note p {
  margin: 0;
  font-size: 14.5px;
}

/* --- 响应路径 --- */
.page-contact .path-grid {
  display: grid;
  gap: 1px;
  margin-top: 18px;
  background: var(--ink-600);
  border: var(--pc-hair);
}
.page-contact .path {
  padding: 16px 14px 18px;
  background: var(--ink-900);
}
.page-contact .path__label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cy-500);
}
.page-contact .path--signal .path__label {
  color: var(--or-500);
}
.page-contact .path ol {
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}
.page-contact .path li {
  display: grid;
  grid-template-columns: 30px 1fr;
  gap: 6px;
  font-size: 14.5px;
  line-height: 1.65;
}
.page-contact .path .step {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.9;
  color: var(--gry-500);
  font-variant-numeric: tabular-nums;
}

/* --- 合作方向卡片 --- */
.page-contact .coop-grid {
  display: grid;
  gap: 16px;
  margin-top: 18px;
}
.page-contact .coop {
  position: relative;
  display: grid;
  gap: 8px;
  padding: 16px 16px 18px 20px;
  background: var(--ink-800);
  border: var(--pc-hair);
  transition: background-color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .coop::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 2px;
  background: var(--cy-500);
}
.page-contact .coop:hover,
.page-contact .coop:focus-within {
  background: var(--ink-600);
  border-color: var(--cy-500);
}
.page-contact .coop__coord {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cy-500);
}
.page-contact .coop__desc {
  margin: 0;
  font-size: 14.5px;
}
.page-contact .coop__specs {
  display: grid;
  gap: 2px;
  margin: 2px 0 0;
  padding-top: 10px;
  border-top: var(--pc-hair);
}
.page-contact .coop__specs dt {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}
.page-contact .coop__specs dd {
  margin: 2px 0 0;
  font-size: 14px;
  line-height: 1.7;
}
.page-contact .coop__foot {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--gry-500);
}
.page-contact .coop__foot a {
  color: var(--cy-200);
}

/* --- 提交前清单 --- */
.page-contact .checklist {
  display: grid;
  gap: 1px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  background: var(--ink-600);
  border: var(--pc-hair);
}
.page-contact .checklist li {
  background: var(--ink-900);
}
.page-contact .check-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 14px;
  cursor: pointer;
  transition: background-color var(--dur) var(--ease);
}
.page-contact .check-item:hover {
  background: var(--ink-800);
}
.page-contact .check-item input {
  flex: none;
  width: 16px;
  height: 16px;
  margin: 5px 0 0;
  appearance: none;
  -webkit-appearance: none;
  background: transparent;
  border: 1px solid var(--gry-500);
  border-radius: 0;
  cursor: pointer;
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}
.page-contact .check-item input:checked {
  background: var(--cy-500);
  border-color: var(--cy-500);
  box-shadow: inset 0 0 0 3px var(--ink-900);
}
.page-contact .check-item input:focus-visible {
  outline: 1px solid var(--cy-500);
  outline-offset: 2px;
}
.page-contact .check-item__text {
  font-size: 14.5px;
  line-height: 1.7;
  transition: color var(--dur) var(--ease);
}
.page-contact .check-item input:checked ~ .check-item__text {
  color: var(--gry-500);
}
.page-contact .check-item__key {
  display: inline-block;
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--cy-500);
}
.page-contact .check-item input:checked ~ .check-item__text .check-item__key {
  color: var(--gry-500);
}

/* --- 地址与备案 --- */
.page-contact .addr-list {
  display: grid;
  gap: 1px;
  margin: 18px 0 0;
  background: var(--ink-600);
  border: var(--pc-hair);
}
.page-contact .addr-row {
  display: grid;
  gap: 4px;
  padding: 12px 14px;
  background: var(--ink-900);
}
.page-contact .addr-row dt {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gry-500);
}
.page-contact .addr-row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
}
.page-contact .addr-row dd.mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--cy-200);
  letter-spacing: 0.02em;
}

/* --- 不接收的内容 --- */
.page-contact .limit-list {
  display: grid;
  gap: 0;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: var(--pc-hair);
}
.page-contact .limit-list li {
  display: grid;
  grid-template-columns: 34px 1fr;
  gap: 8px;
  padding: 12px 0;
  font-size: 14.5px;
  line-height: 1.7;
  border-bottom: var(--pc-hair);
}
.page-contact .limit-key {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 2;
  color: var(--gry-500);
  font-variant-numeric: tabular-nums;
}

/* --- 平板与桌面 --- */
@media (min-width: 700px) {
  .page-contact .path-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .contact-plate {
    padding: 22px 24px 24px;
  }
  .page-contact .contact-plate__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }
  .page-contact .addr-row {
    grid-template-columns: 120px 1fr;
    align-items: baseline;
    gap: 16px;
  }
}

@media (min-width: 900px) {
  .page-contact .wrap {
    padding: 24px 24px 0;
  }
  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 3.2fr) minmax(0, 8.8fr);
    gap: 40px;
    margin-top: 40px;
  }
  .page-contact .channel-index {
    position: sticky;
    top: calc(var(--frame-top) + 20px);
    align-self: start;
  }
  .page-contact .coop-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .section + .section {
    margin-top: 52px;
  }
}

@media (min-width: 1180px) {
  .page-contact .hero-metrics__item {
    padding: 14px 16px 16px;
  }
  .page-contact .hero-metrics__num {
    font-size: 17px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0ms !important;
  }
}
</main>