.page-contact {
  background: var(--ink);
  color: var(--paper);
}

/* ---------- 面包屑 ---------- */
.page-contact .contact-crumb {
  margin-bottom: 28px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: 28px 0 80px;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(30, 48, 72, .34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 48, 72, .34) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 84%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .85), transparent 84%);
  pointer-events: none;
}

.page-contact .contact-hero .container {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  align-items: end;
}

.page-contact .contact-hero-copy h1 {
  margin: 12px 0 18px;
}

.page-contact .contact-hero-media {
  margin: 0;
  border: 2px solid var(--rule);
  box-shadow: var(--shadow);
  background: var(--ink-2);
  overflow: hidden;
}

.page-contact .contact-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(.92) contrast(1.05);
}

/* ---------- 联络信息板 ---------- */
.page-contact .contact-board {
  position: relative;
  margin-top: 52px;
  display: grid;
  grid-template-columns: 1fr;
  border: 2px solid var(--rule);
  box-shadow: var(--shadow);
  background: linear-gradient(180deg, rgba(200, 247, 81, .05), rgba(14, 26, 43, .88) 70%);
}

.page-contact .contact-board::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  top: -2px;
  height: 3px;
  background: linear-gradient(90deg, var(--lime), rgba(200, 247, 81, 0) 68%);
}

.page-contact .contact-channel {
  padding: 26px 22px 28px;
  border-top: 2px solid var(--rule);
}

.page-contact .contact-channel:first-child {
  border-top: 0;
}

.page-contact .contact-value {
  margin: 10px 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 1.4vw + .7rem, 1.55rem);
  font-weight: 600;
  letter-spacing: .01em;
  color: var(--lime);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.page-contact .contact-note {
  margin: 0;
  max-width: 46ch;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 主体两栏 ---------- */
.page-contact .contact-body {
  padding: 76px 0 88px;
}

.page-contact .contact-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 52px;
}

/* 章节索引 */
.page-contact .contact-index {
  display: flex;
  gap: 4px;
  overflow-x: auto;
  padding-bottom: 12px;
  margin-bottom: 44px;
  border-bottom: 1px solid var(--rule-soft);
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.page-contact .contact-index::-webkit-scrollbar {
  height: 4px;
}

.page-contact .contact-index::-webkit-scrollbar-thumb {
  background: var(--rule);
}

.page-contact .index-link {
  flex: 0 0 auto;
  padding: 6px 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
  text-decoration: none;
  border: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .index-link:hover,
.page-contact .index-link:focus-visible {
  color: var(--paper);
  border-color: var(--rule);
}

.page-contact .index-link[aria-current="true"] {
  color: var(--lime);
  border-color: var(--lime-deep);
}

/* 区块 */
.page-contact .contact-block {
  padding-bottom: 60px;
  margin-bottom: 60px;
  border-bottom: 1px solid var(--rule-soft);
}

.page-contact .contact-block--last {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-contact .contact-block-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  margin-bottom: 18px;
}

.page-contact .contact-block-head .index-num {
  padding-top: 8px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .08em;
  color: var(--lime);
}

.page-contact .contact-block-head h2 {
  margin: 6px 0 0;
}

/* 档案卡式信息条 */
.page-contact .contact-list {
  display: grid;
  gap: 12px;
  margin-top: 26px;
}

.page-contact .contact-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 20px;
  border: 1px solid var(--rule);
  border-left: 3px solid var(--lime-deep);
  background: rgba(7, 13, 21, .55);
  transition: border-color var(--dur) var(--ease),
              background-color var(--dur) var(--ease),
              transform var(--dur) var(--ease);
}

.page-contact .contact-item:hover {
  border-left-color: var(--lime);
  background: rgba(14, 26, 43, .9);
  transform: translateX(3px);
}

.page-contact .contact-item-num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.9;
  color: var(--lime);
}

.page-contact .contact-item-title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-contact .contact-item p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(238, 243, 246, .86);
}

.page-contact .contact-link {
  color: var(--lime);
  text-decoration: none;
  border-bottom: 1px solid rgba(200, 247, 81, .4);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .contact-link:hover,
.page-contact .contact-link:focus-visible {
  color: var(--paper);
  border-bottom-color: var(--paper);
}

/* 准备清单 */
.page-contact .prepare-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  margin-top: 24px;
}

.page-contact .check-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .check-list li {
  position: relative;
  padding-left: 26px;
  font-size: .95rem;
  line-height: 1.8;
  color: rgba(238, 243, 246, .86);
}

.page-contact .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .85em;
  width: 14px;
  height: 2px;
  background: var(--lime);
}

.page-contact .check-list strong {
  color: var(--paper);
  font-weight: 600;
}

.page-contact .prepare-media {
  margin: 0;
  border: 2px solid var(--rule);
  background: var(--ink-2);
  overflow: hidden;
}

.page-contact .prepare-media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}

.page-contact .prepare-media .media-caption {
  padding: 12px 14px;
  margin: 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
  border-top: 1px solid var(--rule-soft);
}

/* 域名与备案 */
.page-contact .record-list {
  margin: 24px 0 0;
  border: 2px solid var(--rule);
  background: rgba(7, 13, 21, .55);
}

.page-contact .record-row {
  display: grid;
  gap: 6px;
  padding: 16px 20px;
  border-top: 1px solid var(--rule-soft);
}

.page-contact .record-row:first-child {
  border-top: 0;
}

.page-contact .record-key {
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--muted);
}

.page-contact .record-val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* 折叠组 */
.page-contact .expand-group {
  margin-top: 12px;
  border: 1px solid var(--rule);
  background: rgba(7, 13, 21, .55);
  transition: border-color var(--dur) var(--ease), background-color var(--dur) var(--ease);
}

.page-contact .expand-group[data-open="true"] {
  border-color: var(--lime-deep);
  background: rgba(15, 46, 49, .5);
}

.page-contact .expand-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 20px;
  background: none;
  border: 0;
  cursor: pointer;
  text-align: left;
  font-family: var(--font-display);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
  transition: color var(--dur) var(--ease);
}

.page-contact .expand-group[data-open="true"] .expand-trigger {
  color: var(--lime);
}

.page-contact .expand-icon {
  flex: 0 0 auto;
  position: relative;
  width: 14px;
  height: 14px;
  border: 2px solid currentColor;
  transition: transform var(--dur) var(--ease);
}

.page-contact .expand-icon::before,
.page-contact .expand-icon::after {
  content: "";
  position: absolute;
  background: currentColor;
}

.page-contact .expand-icon::before {
  left: 2px;
  right: 2px;
  top: 50%;
  height: 2px;
  transform: translateY(-50%);
}

.page-contact .expand-icon::after {
  top: 2px;
  bottom: 2px;
  left: 50%;
  width: 2px;
  transform: translateX(-50%);
}

.page-contact .expand-group[data-open="true"] .expand-icon::after {
  opacity: 0;
}

.page-contact .expand-panel {
  display: block;
}

.page-contact .expand-panel[hidden] {
  display: none;
}

.page-contact .expand-body {
  padding: 0 20px 20px;
}

.page-contact .expand-body p {
  margin: 0;
  font-size: .95rem;
  line-height: 1.85;
  color: rgba(238, 243, 246, .86);
}

.page-contact .contact-cta {
  margin: 32px 0 0;
}

/* 右侧固定摘要 */
.page-contact .contact-aside {
  align-self: start;
  padding: 24px 22px 26px;
  border: 2px solid var(--rule);
  background: rgba(14, 26, 43, .82);
  box-shadow: var(--shadow-sm);
}

.page-contact .contact-aside-title {
  margin: 10px 0 12px;
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--paper);
}

.page-contact .contact-aside-text {
  margin: 0 0 20px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

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

.page-contact .contact-aside-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border: 1px solid var(--rule);
  font-size: .9rem;
  color: var(--paper);
}

.page-contact .contact-aside-num {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--orange);
}

.page-contact .contact-aside-foot {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--rule-soft);
}

.page-contact .contact-aside-meta {
  margin: 0 0 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--muted);
}

.page-contact .contact-aside-strong {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--lime);
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-contact .prepare-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
  }

  .page-contact .record-row {
    grid-template-columns: 170px minmax(0, 1fr);
    align-items: center;
    gap: 20px;
  }

  .page-contact .contact-channel {
    padding: 30px 28px 32px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-board {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .contact-channel {
    border-top: 0;
    border-left: 2px solid var(--rule);
  }

  .page-contact .contact-channel:first-child {
    border-left: 0;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero {
    padding: 36px 0 96px;
  }

  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 56px;
  }

  .page-contact .contact-body {
    padding: 104px 0 112px;
  }
}

@media (min-width: 1040px) {
  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 64px;
    align-items: start;
  }

  .page-contact .contact-aside {
    position: sticky;
    top: 96px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-item,
  .page-contact .expand-icon,
  .page-contact .index-link,
  .page-contact .contact-link {
    transition: none;
  }

  .page-contact .contact-item:hover {
    transform: none;
  }
}