.page-contact {
  --c-pad: clamp(16px, 4vw, 34px);
  --c-gap: clamp(44px, 7vw, 84px);
  --c-radius: var(--radius);
  display: block;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: var(--c-pad);
  padding-bottom: clamp(48px, 8vw, 88px);
  color: var(--paper);
  font-family: var(--font-sans);
}

.page-contact .breadcrumb {
  margin: 18px 0 14px;
  font-size: 13px;
  color: var(--steel);
}
.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: 8px;
  color: var(--ink-3);
}
.page-contact .breadcrumb-item a {
  color: var(--steel);
  text-decoration: none;
}
.page-contact .breadcrumb-item a:hover,
.page-contact .breadcrumb-item a:focus-visible {
  color: var(--gold);
}

/* 首屏 */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(24px, 5vw, 52px) clamp(18px, 4vw, 44px);
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  background:
    radial-gradient(120% 150% at 100% 0%, rgba(232, 181, 60, 0.18), transparent 58%),
    linear-gradient(155deg, var(--ink-2) 0%, var(--ink) 72%);
}
.page-contact .contact-hero::before,
.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  width: 54px;
  height: 54px;
  border: 1px solid var(--gold);
  opacity: 0.55;
  pointer-events: none;
}
.page-contact .contact-hero::before {
  top: 12px;
  left: 12px;
  border-right: 0;
  border-bottom: 0;
}
.page-contact .contact-hero::after {
  right: 12px;
  bottom: 12px;
  border-left: 0;
  border-top: 0;
}

.page-contact .hero-grid {
  position: relative;
  display: grid;
  gap: clamp(24px, 4vw, 40px);
}

.page-contact .hero-eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-contact .contact-hero h1 {
  margin: 0 0 16px;
  font-size: clamp(28px, 6.2vw, 50px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .hero-lead {
  max-width: 46ch;
  margin: 0 0 24px;
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.78;
  color: rgba(244, 246, 251, 0.82);
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.page-contact .hero-actions .btn {
  padding: 11px 20px;
  font-size: 14px;
  border-radius: var(--c-radius);
  text-decoration: none;
}

.page-contact .hero-stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin: 0;
  padding-top: 20px;
  border-top: 1px solid var(--line-soft);
}
.page-contact .hero-stats .stat {
  display: flex;
  flex-direction: column-reverse;
  gap: 4px;
  padding-left: 12px;
  border-left: 2px solid var(--gold);
}
.page-contact .hero-stats dt {
  font-size: 12px;
  line-height: 1.4;
  color: var(--steel);
}
.page-contact .stat-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: clamp(22px, 4.6vw, 32px);
  line-height: 1;
  font-weight: 700;
  color: var(--gold);
}
.page-contact .stat-unit {
  margin-left: 4px;
  font-family: var(--font-sans);
  font-size: 12px;
  color: var(--steel);
}

/* 章节编号带 */
.page-contact .chapter-band {
  display: flex;
  gap: 8px;
  margin: 18px 0 var(--c-gap);
  padding: 10px 0;
  overflow-x: auto;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  scrollbar-width: none;
}
.page-contact .chapter-band::-webkit-scrollbar {
  display: none;
}
.page-contact .chapter-band a {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  flex: 0 0 auto;
  padding: 7px 13px;
  border: 1px solid var(--line-soft);
  border-radius: 999px;
  font-size: 13px;
  color: var(--steel);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .chapter-band .cb-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--gold);
}
.page-contact .chapter-band a:hover,
.page-contact .chapter-band a:focus-visible {
  color: var(--paper);
  border-color: var(--gold);
}

/* 章节通用 */
.page-contact .c-sec {
  margin-bottom: var(--c-gap);
  scroll-margin-top: 92px;
}
.page-contact .c-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  align-items: start;
  margin-bottom: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.page-contact .c-num {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.4vw, 40px);
  line-height: 1;
  font-weight: 700;
  color: var(--gold);
}
.page-contact .c-title {
  margin: 0;
  font-size: clamp(19px, 3.6vw, 28px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--paper);
}
.page-contact .c-note {
  grid-column: 2;
  margin: 6px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--steel);
}

.page-contact .c-split {
  display: grid;
  gap: 18px;
}
.page-contact .c-split--tight {
  gap: 22px;
  margin-top: 20px;
}

/* 自查折叠 */
.page-contact .c-checks {
  display: grid;
  gap: 12px;
  align-content: start;
}
.page-contact .c-check {
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  background: var(--ink-2);
  overflow: hidden;
}
.page-contact .c-check summary {
  display: grid;
  grid-template-columns: 20px minmax(0, 1fr) auto;
  gap: 4px 12px;
  align-items: start;
  padding: 15px 16px;
  list-style: none;
  cursor: pointer;
}
.page-contact .c-check summary::-webkit-details-marker {
  display: none;
}
.page-contact .c-check-box {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 2px;
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .c-check[open] .c-check-box {
  background: var(--gold);
  border-color: var(--gold);
}
.page-contact .c-check[open] .c-check-box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 2px;
  width: 4px;
  height: 9px;
  border: solid var(--ink);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.page-contact .c-check-title {
  font-size: 15.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--paper);
}
.page-contact .c-check-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel);
  padding-top: 3px;
}
.page-contact .c-check-body {
  padding: 0 16px 18px 48px;
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(244, 246, 251, 0.78);
}
.page-contact .c-check-body p {
  margin: 0 0 10px;
}
.page-contact .c-check-body ol {
  margin: 0 0 12px;
  padding-left: 18px;
  color: var(--steel);
}
.page-contact .c-check-body li {
  margin-bottom: 6px;
}

.page-contact .c-inline-link {
  display: inline-block;
  font-size: 13.5px;
  color: var(--gold);
  text-decoration: none;
  border-bottom: 1px solid rgba(232, 181, 60, 0.5);
  padding-bottom: 2px;
}
.page-contact .c-inline-link::after {
  content: " →";
  font-family: var(--font-mono);
}
.page-contact .c-inline-link:hover,
.page-contact .c-inline-link:focus-visible {
  color: var(--gold-2);
  border-bottom-color: var(--gold-2);
}

/* 图 */
.page-contact .c-figure {
  margin: 0;
}
.page-contact .c-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  background: var(--ink-2);
}
.page-contact .c-figure--square img {
  aspect-ratio: 4 / 3;
}
.page-contact .c-figure figcaption {
  margin-top: 9px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--steel);
}

/* 面板 */
.page-contact .c-panel {
  padding: clamp(18px, 3.4vw, 26px);
  border-radius: var(--c-radius);
}
.page-contact .c-panel--solid {
  background: var(--ink-2);
  border: 1px solid var(--line);
}
.page-contact .c-panel--glass {
  background: var(--glass);
  border: 1px solid var(--line-soft);
  backdrop-filter: blur(6px);
}
.page-contact .c-panel--wide {
  background: linear-gradient(160deg, var(--ink-2), var(--ink) 88%);
  border: 1px solid var(--line);
}
.page-contact .c-panel-title {
  margin: 0 0 14px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--gold-2);
}
.page-contact .c-lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(244, 246, 251, 0.82);
}
.page-contact .c-list {
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .c-list li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(244, 246, 251, 0.8);
}
.page-contact .c-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 2px;
  background: var(--gold);
}
.page-contact .c-list--check li::before {
  content: "✓";
  top: 0;
  width: auto;
  height: auto;
  background: none;
  font-size: 12px;
  color: var(--celadon);
}
.page-contact .c-hint {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--steel);
}

/* 渠道筛选 */
.page-contact .c-filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 12px;
}
.page-contact .c-filter-btn {
  padding: 7px 15px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: transparent;
  color: var(--steel);
  font-family: var(--font-sans);
  font-size: 13px;
  cursor: pointer;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.page-contact .c-filter-btn:hover,
.page-contact .c-filter-btn:focus-visible {
  color: var(--gold-2);
  border-color: var(--gold);
}
.page-contact .c-filter-btn.is-active {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
  font-weight: 700;
}
.page-contact .c-filter-status {
  margin: 0 0 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--steel);
}
.page-contact .c-channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}
.page-contact .c-channel {
  position: relative;
  padding: 20px 18px 18px;
  border: 1px solid var(--line);
  border-radius: var(--c-radius);
  background:
    linear-gradient(180deg, rgba(244, 246, 251, 0.07), transparent 45%),
    var(--ink-2);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.page-contact .c-channel::before {
  content: "";
  position: absolute;
  left: 18px;
  top: -1px;
  width: 44px;
  height: 2px;
  background: var(--gold);
}
.page-contact .c-channel:hover {
  transform: translateY(-3px);
  border-color: var(--gold);
}
.page-contact .c-channel-tag {
  display: inline-block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--celadon);
}
.page-contact .c-channel h3 {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--paper);
}
.page-contact .c-mono {
  display: block;
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.6;
  letter-spacing: 0.02em;
  color: var(--gold);
  word-break: break-word;
  user-select: all;
}
.page-contact .c-channel p:last-child {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* 合作模板 */
.page-contact .c-template {
  margin: 0;
  padding: 14px 16px;
  border: 1px dashed var(--line);
  border-radius: var(--c-radius);
  background: rgba(16, 26, 58, 0.6);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.9;
  color: rgba(244, 246, 251, 0.82);
  white-space: pre-wrap;
  overflow-x: auto;
}

/* 时间线 */
.page-contact .c-timeline {
  margin: 0 0 20px;
  padding: 0 0 0 22px;
  list-style: none;
  border-left: 1px solid var(--line);
}
.page-contact .c-timeline li {
  position: relative;
  padding: 0 0 22px 4px;
}
.page-contact .c-timeline li:last-child {
  padding-bottom: 0;
}
.page-contact .c-timeline li::before {
  content: "";
  position: absolute;
  left: -29px;
  top: 4px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--gold);
  box-shadow: 0 0 0 4px rgba(232, 181, 60, 0.14);
}
.page-contact .c-time {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--celadon-2);
}
.page-contact .c-timeline h3 {
  margin: 0 0 6px;
  font-size: 15.5px;
  font-weight: 700;
  color: var(--paper);
}
.page-contact .c-timeline p {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel);
}
.page-contact .c-team-note {
  margin: 0;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--c-radius);
  background: var(--glass);
  font-size: 13.5px;
  line-height: 1.75;
  color: rgba(244, 246, 251, 0.78);
}

/* 备案信息 */
.page-contact .c-record-list {
  margin: 0 0 16px;
}
.page-contact .c-record-list > div {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr);
  gap: 10px;
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}
.page-contact .c-record-list dt {
  font-size: 12.5px;
  color: var(--steel);
}
.page-contact .c-record-list dd {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.6;
  color: rgba(244, 246, 251, 0.86);
}
.page-contact .c-record-list .c-mono {
  margin: 0;
  font-size: 13.5px;
}
.page-contact .c-record > p {
  margin: 0 0 14px;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--steel);
}

/* 收尾 */
.page-contact .c-footline {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}
.page-contact .c-footline p {
  margin: 0;
  max-width: 62ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--steel);
}
.page-contact .c-top {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--gold);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
  text-decoration: none;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}
.page-contact .c-top:hover,
.page-contact .c-top:focus-visible {
  background: var(--gold);
  color: var(--ink);
}

@media (min-width: 600px) {
  .page-contact .c-channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 860px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 0.85fr);
    align-items: end;
  }
  .page-contact .hero-stats {
    grid-template-columns: minmax(0, 1fr);
    padding-top: 0;
    padding-left: 22px;
    border-top: 0;
    border-left: 1px solid var(--line-soft);
    align-self: stretch;
    align-content: end;
  }
  .page-contact .c-split {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }
  .page-contact .c-split--a {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  }
  .page-contact .c-split--b {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  }
  .page-contact .c-split--tight {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }
  .page-contact .c-figure {
    align-self: start;
  }
}

@media (min-width: 1080px) {
  .page-contact {
    padding-left: calc(var(--rail-w) + 26px);
  }
  .page-contact .c-channel-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .c-channel,
  .page-contact .c-filter-btn,
  .page-contact .c-top {
    transition: none;
  }
  .page-contact .c-channel:hover {
    transform: none;
  }
}