.page-contact {
  --pc-space: 72px;
  padding-bottom: 96px;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 26px 0 30px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--silver-dim);
}

.page-contact .breadcrumb a {
  color: var(--silver-dim);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--gold-soft);
  border-bottom-color: var(--gold-dim);
}

.page-contact .breadcrumb__sep {
  color: var(--gold-dim);
}

.page-contact .breadcrumb [aria-current="page"] {
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 30px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--hairline);
}

.page-contact .contact-hero__body {
  min-width: 0;
}

.page-contact .contact-hero .annotation {
  margin: 0 0 18px;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--gold);
}

.page-contact h1 {
  margin: 0 0 20px;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 30px;
  line-height: 1.26;
  letter-spacing: 0.04em;
  color: var(--silver);
}

.page-contact .lede {
  margin: 0 0 28px;
  max-width: 62ch;
  font-family: var(--serif);
  font-size: 16.5px;
  line-height: 1.85;
  color: var(--silver-dim);
}

.page-contact .hero-index {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-contact .hero-index li {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 13px 4px;
  background: var(--c-base);
}

.page-contact .hero-index .mono {
  flex: none;
  min-width: 46px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-dim);
}

.page-contact .hero-index strong {
  font-family: var(--mono);
  font-size: 14.5px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--silver);
  word-break: break-all;
}

.page-contact .contact-hero__visual {
  margin: 0;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-deep);
}

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

/* ---------- 区块头 ---------- */
.page-contact .section {
  margin-top: var(--pc-space);
}

.page-contact .section-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.page-contact .section-num {
  flex: none;
  font-family: var(--mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-contact .section-title {
  flex: none;
  margin: 0;
  max-width: 76%;
  font-family: var(--sans);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.35;
  letter-spacing: 0.04em;
  color: var(--silver);
}

.page-contact .section-rule {
  flex: 1 1 auto;
  min-width: 20px;
  height: 1px;
  background: linear-gradient(90deg, var(--gold-dim), transparent);
}

.page-contact .contact-lead {
  margin: 0 0 24px;
  max-width: 68ch;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.85;
  color: var(--silver-dim);
}

/* ---------- 三条渠道 ---------- */
.page-contact .contact-channels {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .channel-card {
  position: relative;
  padding: 30px 22px 24px;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.24s var(--ease), border-color 0.24s var(--ease),
    background-color 0.24s var(--ease);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translateY(-4px);
  border-color: var(--gold-dim);
  background-color: var(--glass-strong);
}

.page-contact .channel-card__flag {
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
}

.page-contact .channel-card--mail .channel-card__flag {
  background: linear-gradient(90deg, var(--gold), transparent 74%);
}

.page-contact .channel-card--phone .channel-card__flag {
  background: linear-gradient(90deg, var(--gold-soft), transparent 74%);
}

.page-contact .channel-card--letter .channel-card__flag {
  background: linear-gradient(90deg, var(--cinnabar), transparent 74%);
}

.page-contact .channel-card__tag {
  display: block;
  margin-bottom: 12px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--gold-dim);
}

.page-contact .channel-card__title {
  margin: 0 0 12px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 17.5px;
  letter-spacing: 0.03em;
  color: var(--silver);
}

.page-contact .channel-card__desc {
  margin: 0 0 20px;
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.82;
  color: var(--silver-dim);
}

.page-contact .channel-card__meta {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--hairline);
  display: grid;
  gap: 9px;
}

.page-contact .channel-card__meta li {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--silver);
  word-break: break-all;
}

.page-contact .channel-card__meta .mono {
  flex: none;
  min-width: 34px;
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gold-dim);
}

/* ---------- 回复流程 ---------- */
.page-contact .reply-flow {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
  position: relative;
}

.page-contact .reply-flow__step {
  position: relative;
  padding: 0 0 28px 40px;
}

.page-contact .reply-flow__step::before {
  content: "";
  position: absolute;
  left: 9px;
  top: 22px;
  bottom: 0;
  width: 1px;
  background: var(--hairline);
}

.page-contact .reply-flow__step:last-child::before {
  display: none;
}

.page-contact .reply-flow__node {
  position: absolute;
  left: 0;
  top: 0;
  display: grid;
  place-items: center;
  width: 19px;
  height: 19px;
  border: 1px solid var(--gold-dim);
  border-radius: 50%;
  background: var(--c-base);
  font-family: var(--mono);
  font-size: 9px;
  letter-spacing: 0;
  color: var(--gold);
}

.page-contact .reply-flow__step h3 {
  margin: 1px 0 8px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 16px;
  letter-spacing: 0.03em;
  color: var(--silver);
}

.page-contact .reply-flow__step p {
  margin: 0;
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.8;
  color: var(--silver-dim);
}

.page-contact .reply-note {
  position: relative;
  margin-top: 26px;
  padding: 20px 22px 20px 24px;
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
}

.page-contact .reply-note::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--cinnabar);
}

.page-contact .reply-note p {
  margin: 0;
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.85;
  color: var(--silver-dim);
}

.page-contact .reply-note__tag {
  display: inline-block;
  margin-right: 10px;
  padding: 2px 8px;
  border: 1px solid var(--cinnabar);
  border-radius: var(--radius);
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--gold-soft);
}

/* ---------- 留言要素清单 ---------- */
.page-contact .checklist-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .checklist-block {
  padding: 22px 22px 20px;
  border: 1px solid var(--hairline);
  border-top: 2px solid var(--gold-dim);
  border-radius: var(--radius);
  background: rgba(232, 237, 245, 0.03);
}

.page-contact .checklist-block__title {
  margin: 0 0 16px;
  font-family: var(--mono);
  font-size: 12.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--gold);
}

.page-contact .msg-checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .msg-checklist li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.72;
  color: var(--silver-dim);
}

.page-contact .msg-checklist__box {
  flex: none;
  width: 14px;
  height: 14px;
  margin-top: 6px;
  border: 1px solid var(--gold-dim);
  border-radius: 2px;
  background: rgba(200, 145, 58, 0.07);
}

/* ---------- 协作与纠错 ---------- */
.page-contact .partner-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 14px;
}

.page-contact .partner-card {
  padding: 26px 24px 24px;
  border: 1px solid var(--hairline);
  border-left: 2px solid var(--gold-dim);
  border-radius: var(--radius);
  background: var(--c-panel);
}

.page-contact .partner-card--alert {
  border-left-color: var(--cinnabar);
}

.page-contact .partner-card__tag {
  display: inline-block;
  margin-bottom: 14px;
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--gold-dim);
}

.page-contact .partner-card--alert .partner-card__tag {
  color: var(--cinnabar);
}

.page-contact .partner-card h3 {
  margin: 0 0 12px;
  font-family: var(--sans);
  font-weight: 600;
  font-size: 17px;
  letter-spacing: 0.03em;
  color: var(--silver);
}

.page-contact .partner-card p {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-size: 15px;
  line-height: 1.82;
  color: var(--silver-dim);
}

.page-contact .partner-card__list {
  list-style: none;
  margin: 0;
  padding: 14px 0 0;
  border-top: 1px solid var(--hairline);
  display: grid;
  gap: 10px;
}

.page-contact .partner-card__list li {
  position: relative;
  padding-left: 16px;
  font-family: var(--serif);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--silver-dim);
}

.page-contact .partner-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border: 1px solid var(--gold-dim);
  transform: rotate(45deg);
}

.page-contact .partner-card--alert .partner-card__list li::before {
  border-color: var(--cinnabar);
}

/* ---------- 地址与备案 ---------- */
.page-contact .address-panel {
  border: 1px solid var(--hairline);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-deep);
}

.page-contact .address-panel__map {
  margin: 0;
  height: 190px;
  overflow: hidden;
  background: var(--c-deep);
}

.page-contact .address-panel__map img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.7;
}

.page-contact .address-panel__body {
  padding: 26px 22px 28px;
  border-top: 1px solid var(--hairline);
}

.page-contact .address-list {
  margin: 0 0 18px;
  display: grid;
  gap: 16px;
}

.page-contact .address-list > div {
  display: grid;
  gap: 5px;
}

.page-contact .address-list dt {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-dim);
}

.page-contact .address-list dd {
  margin: 0;
  font-family: var(--serif);
  font-size: 16px;
  line-height: 1.7;
  color: var(--silver);
  word-break: break-all;
}

.page-contact .address-panel__note {
  margin: 0;
  max-width: 62ch;
  font-family: var(--serif);
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--silver-dim);
}

/* ---------- 相关入口 ---------- */
.page-contact .related-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--hairline);
  border-top: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
}

.page-contact .related-list li {
  background: var(--c-base);
}

.page-contact .related-list a {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 15px 8px;
  text-decoration: none;
  font-family: var(--serif);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--silver-dim);
  transition: color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .related-list a:hover,
.page-contact .related-list a:focus-visible {
  color: var(--gold-soft);
  background-color: var(--c-panel);
}

.page-contact .related-list .mono {
  flex: none;
  min-width: 16px;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--gold-dim);
}

/* ---------- 平板 ---------- */
@media (min-width: 680px) {
  .page-contact .contact-channels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-contact .address-panel__map {
    height: 240px;
  }
}

/* ---------- 桌面 ---------- */
@media (min-width: 900px) {
  .page-contact {
    --pc-space: 96px;
  }

  .page-contact .contact-hero {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 56px;
    align-items: center;
    padding-bottom: 64px;
  }

  .page-contact h1 {
    font-size: 44px;
    line-height: 1.18;
  }

  .page-contact .lede {
    font-size: 17px;
  }

  .page-contact .section-title {
    font-size: 24px;
  }

  .page-contact .reply-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 20px;
    margin-top: 38px;
  }

  .page-contact .reply-flow::before {
    content: "";
    position: absolute;
    left: 9px;
    right: 9px;
    top: 9px;
    height: 1px;
    background: linear-gradient(90deg, var(--gold-dim), var(--hairline) 78%);
  }

  .page-contact .reply-flow__step {
    padding: 42px 14px 0 0;
  }

  .page-contact .reply-flow__step::before {
    display: none;
  }

  .page-contact .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .address-panel__body {
    padding: 32px 32px 34px;
  }

  .page-contact .address-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-channels {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact h1 {
    font-size: 48px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .related-list a,
  .page-contact .breadcrumb a {
    transition: none;
  }

  .page-contact .channel-card:hover,
  .page-contact .channel-card:focus-within {
    transform: none;
  }
}