/* ===================== 页面容器与基础 ===================== */
.page-contact {
  background: var(--page-bg);
  color: var(--ink);
  font-family: var(--font-sans);
  min-height: 60vh;
}

.page-contact a {
  color: inherit;
}

.page-contact .page-wrap {
  width: 100%;
  max-width: var(--content-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 16px;
  padding-right: 16px;
  box-sizing: border-box;
}

.page-contact a:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

/* ===================== 面包屑 ===================== */
.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding-top: 18px;
  padding-bottom: 6px;
  font-size: 13px;
  font-weight: 700;
}

.page-contact .breadcrumb__item {
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color .15s ease;
}

.page-contact .breadcrumb__item:hover {
  border-color: var(--ink);
}

.page-contact .breadcrumb__item[aria-current="page"] {
  color: var(--accent);
  border-bottom-style: dotted;
}

.page-contact .breadcrumb__sep {
  color: var(--line);
  font-weight: 900;
}

/* ===================== 主视觉 ===================== */
.page-contact__hero {
  position: relative;
  padding-top: 20px;
  padding-bottom: 28px;
  border-bottom: 3px solid var(--ink);
  overflow: hidden;
}

.page-contact__hero-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 16px;
}

.page-contact__hero-code {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .08em;
  padding: 3px 8px;
  background: var(--paper);
  border: 2px solid var(--ink);
  color: var(--accent);
  text-transform: uppercase;
}

.page-contact__hero h1 {
  font-size: clamp(2.2rem, 8vw, 4.2rem);
  line-height: 1;
  font-weight: 900;
  letter-spacing: .01em;
  margin: 18px 0 10px;
  text-transform: uppercase;
}

.page-contact__lead {
  font-size: 15px;
  line-height: 1.65;
  max-width: 640px;
  color: #3A3A3A;
  margin: 0 0 6px;
}

.page-contact__hero-mark {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .2em;
  color: var(--accent);
  border: 1px dashed var(--line);
  padding: 4px 10px;
  margin-top: 14px;
}

/* ===================== 联系入口 ===================== */
.page-contact__channels {
  padding: 34px 0 10px;
  background-image:
    linear-gradient(rgba(26,26,26,.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(26,26,26,.05) 1px, transparent 1px);
  background-size: 28px 28px;
  background-position: -1px -1px;
}

.page-contact__section-head {
  margin-bottom: 24px;
}

.page-contact__section-head .section-title {
  font-size: 1.8rem;
  font-weight: 900;
  line-height: 1.15;
  margin: 0 0 6px;
}

.page-contact__section-head .section-desc {
  font-size: 14px;
  color: #3A3A3A;
  line-height: 1.6;
  max-width: 480px;
  margin: 0;
}

.page-contact__channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
}

.page-contact__channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  padding: 26px 22px 20px;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  text-decoration: none;
  overflow: hidden;
  transition: transform .15s ease, box-shadow .15s ease;
}

.page-contact__channel-card--email {
  background: var(--tile-orange);
}

.page-contact__channel-card--phone {
  background: var(--tile-yellow);
}

.page-contact__channel-card--address {
  background: var(--tile-teal);
  cursor: default;
}

.page-contact__channel-card--email:hover,
.page-contact__channel-card--phone:hover {
  transform: translate(-2px, -2px);
  box-shadow: 9px 9px 0 rgba(26,26,26,.2);
}

.page-contact__channel-coord {
  position: absolute;
  top: 10px;
  right: 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 800;
  letter-spacing: .12em;
  color: rgba(26,26,26,.55);
  border: 1px solid rgba(26,26,26,.35);
  padding: 2px 8px;
  background: rgba(255,255,255,.4);
  text-transform: uppercase;
}

.page-contact__channel-icon {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  border: 3px solid var(--ink);
  background: rgba(255,255,255,.5);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  flex-shrink: 0;
  margin-top: 8px;
}

.page-contact__channel-icon svg {
  width: 44px;
  height: 44px;
  stroke: var(--ink);
}

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

.page-contact__channel-band {
  align-self: flex-start;
  background: var(--paper);
  border: 2px solid var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .12em;
  text-transform: uppercase;
  padding: 4px 10px;
  margin-top: 6px;
}

.page-contact__channel-value {
  font-size: clamp(1.05rem, 3.2vw, 1.45rem);
  font-weight: 900;
  line-height: 1.35;
  word-break: break-word;
  display: block;
  letter-spacing: .01em;
}

.page-contact__channel-desc {
  font-size: 13px;
  line-height: 1.6;
  opacity: .8;
  display: block;
}

.page-contact__channel-action {
  margin-top: auto;
  padding-top: 12px;
  border-top: 2px solid var(--ink);
  width: 100%;
  font-size: 14px;
  font-weight: 900;
  letter-spacing: .05em;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

/* ===================== 反馈须知 ===================== */
.page-contact__notes {
  margin-top: 44px;
  padding: 42px 0 38px;
  background: var(--page-bg-alt);
  color: var(--paper);
  border-top: 4px solid var(--ink);
  border-bottom: 4px solid var(--ink);
}

.page-contact__notes-inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  align-items: start;
}

.page-contact__notes .eyebrow {
  color: var(--tile-yellow);
  border-bottom: 2px solid rgba(255,255,255,.35);
  padding-bottom: 4px;
  margin-bottom: 8px;
}

.page-contact__notes-content h2 {
  font-size: 1.8rem;
  font-weight: 900;
  margin: 0 0 8px;
  color: var(--paper);
  line-height: 1.15;
}

.page-contact__notes-intro {
  font-size: 14px;
  line-height: 1.65;
  opacity: .85;
  margin: 0 0 18px;
  max-width: 520px;
}

.page-contact__notes-list {
  list-style: none;
  margin: 0 0 22px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact__notes-list li {
  position: relative;
  padding: 14px 14px 14px 48px;
  background: rgba(255,255,255,.08);
  border-left: 4px solid var(--tile-orange);
  font-size: 14px;
  line-height: 1.6;
}

.page-contact__notes-list li::before {
  content: "›";
  position: absolute;
  left: 16px;
  top: 10px;
  font-size: 24px;
  font-weight: 900;
  color: var(--tile-yellow);
  line-height: 1;
}

.page-contact__notes-figure {
  margin: 0;
  padding: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.page-contact__notes-img {
  max-width: 100%;
  height: auto;
  border: 3px solid var(--tile-yellow);
  box-shadow: 10px 10px 0 rgba(0,0,0,.3);
}

.page-contact .btn--primary {
  background: var(--accent);
  color: var(--paper);
  border: 3px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(0,0,0,.25);
  font-weight: 900;
  text-decoration: none;
  font-size: 14px;
  padding: 10px 18px;
  display: inline-block;
  letter-spacing: .03em;
  transition: transform .15s ease, box-shadow .15s ease;
}

.page-contact .btn--primary:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0,0,0,.3);
}

/* ===================== 处理时效 ===================== */
.page-contact__timeline {
  background: var(--paper);
  border-bottom: 4px solid var(--ink);
  padding: 40px 0 46px;
}

.page-contact__timeline .page-contact__section-head {
  margin-bottom: 0;
}

.page-contact__timeline-list {
  list-style: none;
  margin: 28px auto 0;
  padding: 0;
  max-width: 820px;
  position: relative;
  display: grid;
  gap: 24px;
}

.page-contact__timeline-list::before {
  content: "";
  position: absolute;
  left: 22px;
  top: 12px;
  bottom: 12px;
  width: 3px;
  background: var(--line);
  border-radius: 2px;
}

.page-contact__timeline-item {
  position: relative;
  padding-left: 64px;
}

.page-contact__timeline-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--page-bg);
  border: 3px solid var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 800;
  color: var(--accent);
  z-index: 1;
}

.page-contact__timeline-card {
  background: var(--paper);
  border: 2px solid var(--ink);
  box-shadow: 4px 4px 0 rgba(26,26,26,.12);
  padding: 16px 18px;
}

.page-contact__timeline-card h3 {
  font-size: 16px;
  font-weight: 900;
  margin: 0 0 6px;
  letter-spacing: .02em;
}

.page-contact__timeline-card p {
  font-size: 13px;
  line-height: 1.6;
  margin: 0;
  color: #3A3A3A;
}

.page-contact__timeline-badge {
  display: inline-block;
  margin-top: 30px;
  background: var(--accent);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: .04em;
  border: 3px solid var(--ink);
  box-shadow: 6px 6px 0 rgba(26,26,26,.18);
  padding: 12px 20px;
}

/* ===================== 相关入口 ===================== */
.page-contact__related {
  padding: 40px 0 48px;
  display: grid;
  gap: 16px;
  grid-template-columns: 1fr;
}

.page-contact__related-card {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 8px;
  padding: 20px;
  border: 3px solid var(--ink);
  box-shadow: var(--shadow);
  text-decoration: none;
  font-weight: 800;
  font-size: 15px;
  transition: transform .15s ease, box-shadow .15s ease;
}

.page-contact__related-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(26,26,26,.2);
}

.page-contact__related-card--help {
  background: var(--tile-orange);
}

.page-contact__related-card--privacy {
  background: var(--tile-yellow);
}

.page-contact__related-card--disclaimer {
  background: var(--tile-teal);
}

.page-contact__related-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .1em;
  text-transform: uppercase;
  border-bottom: 2px solid var(--ink);
  padding-bottom: 6px;
  align-self: flex-start;
}

.page-contact__related-title {
  font-size: 17px;
  line-height: 1.45;
  display: block;
}

.page-contact__related-arrow {
  font-size: 20px;
  line-height: 1;
  margin-top: auto;
  display: block;
  text-align: right;
}

/* ===================== 桌面端适配 ===================== */
@media (min-width: 768px) {
  .page-contact .page-wrap {
    padding-left: 28px;
    padding-right: 28px;
  }

  .page-contact__hero {
    padding-top: 28px;
    padding-bottom: 34px;
  }

  .page-contact__lead {
    font-size: 16px;
  }

  .page-contact__channel-grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }

  .page-contact__channel-card {
    min-height: 430px;
  }

  .page-contact__notes-inner {
    grid-template-columns: minmax(0, 1fr) 340px;
    gap: 40px;
    align-items: center;
  }

  .page-contact__notes-list {
    gap: 12px;
  }

  .page-contact__timeline {
    padding: 48px 0 56px;
  }

  .page-contact__timeline-list {
    gap: 28px;
  }

  .page-contact__related {
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
  }

  .page-contact__related-card {
    min-height: 160px;
    padding: 24px;
  }
}