.page-contact {
  --pc-tick: repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 12px);
  --pc-gap: 16px;
}

.page-contact .crumb {
  margin: 0 0 20px;
}

/* ---------- 首屏框景 ---------- */
.page-contact .contact-hero {
  position: relative;
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: clamp(20px, 4.5vw, 44px) clamp(18px, 4vw, 40px) clamp(26px, 5vw, 48px);
  margin-bottom: 26px;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 10px 10px auto 10px;
  height: 0;
  border-top: 1px dashed var(--grid);
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 8px;
  background: var(--pc-tick);
  border-top: 1px solid var(--grid);
  pointer-events: none;
}

.page-contact .contact-hero .kicker {
  display: inline-block;
  margin: 0 0 10px;
}

.page-contact .contact-hero h1 {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(26px, 5.2vw, 48px);
  line-height: 1.15;
  color: var(--ink);
  max-width: 22em;
}

.page-contact .contact-hero__lead {
  margin: 0 0 22px;
  font-family: var(--font-body);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
  color: var(--ink);
  max-width: 42em;
}

.page-contact .contact-hero__meta {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .contact-hero__meta li {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 10px 0 10px 14px;
  border-left: 3px solid var(--bamboo);
  background: linear-gradient(90deg, var(--mist) 0%, transparent 70%);
  min-width: 0;
}

.page-contact .mono-strong {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(14px, 2.4vw, 18px);
  font-weight: 600;
  color: var(--ink);
  word-break: break-all;
}

.page-contact .contact-hero__chiprow {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.page-contact .contact-hero__chipnote {
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
  max-width: 34em;
}

/* ---------- 路径轴 + 主体 ---------- */
.page-contact .contact-layout {
  display: grid;
  gap: 22px;
  min-width: 0;
}

.page-contact .contact-axis {
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow-xs);
  padding: 18px;
  min-width: 0;
}

.page-contact .contact-axis__note {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .axis {
  list-style: none;
  margin: 14px 0 0;
  padding: 0 0 0 18px;
  border-left: 2px solid var(--grid);
  display: grid;
  gap: 12px;
}

.page-contact .axis__node {
  position: relative;
  font-family: var(--font-mono);
  font-size: 12.5px;
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

.page-contact .axis__node::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 5px;
  width: 8px;
  height: 8px;
  background: var(--mist);
  border: 2px solid var(--bamboo);
}

.page-contact .axis__node--on::before {
  background: var(--signal);
  border-color: var(--signal);
}

.page-contact .axis__node a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px dashed var(--grid);
  padding-bottom: 1px;
}

.page-contact .axis__node a:hover,
.page-contact .axis__node a:focus-visible {
  border-bottom-color: var(--signal);
  color: var(--bamboo);
}

.page-contact .contact-body {
  display: grid;
  gap: var(--pc-gap);
  min-width: 0;
}

.page-contact .contact-body section {
  min-width: 0;
}

.page-contact .contact-body h2 {
  margin: 6px 0 14px;
  font-family: var(--font-head);
  font-weight: 900;
  letter-spacing: -0.02em;
  font-size: clamp(21px, 3.4vw, 32px);
  line-height: 1.2;
  color: var(--ink);
}

.page-contact .contact-body p {
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink);
  margin: 0 0 14px;
  max-width: 44em;
}

/* ---------- 01 邮件受理 ---------- */
.page-contact .frame-card {
  position: relative;
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: clamp(18px, 3.6vw, 34px);
}

.page-contact .frame-card::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  width: 10px;
  background: repeating-linear-gradient(180deg, var(--grid) 0 1px, transparent 1px 14px);
  border-right: 1px solid var(--grid);
  pointer-events: none;
}

.page-contact .frame-card__grid {
  display: grid;
  gap: 20px;
}

.page-contact .frame-card__text {
  padding-left: 8px;
}

.page-contact .mail-block {
  display: grid;
  gap: 8px;
  margin-top: 18px;
  padding: 16px 16px 14px;
  border: var(--edge);
  background: var(--mist);
  box-shadow: var(--shadow-xs);
}

.page-contact .mail-addr {
  display: inline-block;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(14px, 2.6vw, 21px);
  font-weight: 600;
  color: var(--ink);
  background: var(--haze);
  border: 2px solid var(--ink);
  padding: 6px 10px;
  word-break: break-all;
}

.page-contact .mail-rule {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .figure {
  margin: 0;
}

.page-contact .figure img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  border: var(--edge);
  background: var(--cell);
  object-fit: cover;
}

.page-contact .figure__cap {
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.6;
  color: var(--muted);
}

/* ---------- 02 回复时段 ---------- */
.page-contact .hours-card {
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow-sm);
  padding: clamp(18px, 3.6vw, 32px);
}

.page-contact .haze-note {
  background: var(--haze);
  border-left: 4px solid var(--signal);
  padding: 12px 14px;
  font-weight: 500;
}

.page-contact .hours-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
  counter-reset: hours;
}

.page-contact .hours-list li {
  position: relative;
  padding-left: 34px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
  border-bottom: 1px solid var(--cell);
  padding-bottom: 10px;
}

.page-contact .hours-list li::before {
  counter-increment: hours;
  content: "0" counter(hours);
  position: absolute;
  left: 0;
  top: 2px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--bamboo);
  border: 1px solid var(--bamboo);
  padding: 1px 4px;
}

/* ---------- 03 咨询分类 ---------- */
.page-contact .topics-card {
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow-sm);
  padding: clamp(18px, 3.6vw, 32px);
}

.page-contact .topics-lead {
  color: var(--muted);
}

.page-contact .class-item {
  border: var(--edge);
  background: var(--mist);
  margin: 0 0 12px;
  transition: box-shadow 200ms var(--ease), transform 200ms var(--ease);
}

.page-contact .class-item[open] {
  background: var(--card);
  box-shadow: var(--shadow-xs);
}

.page-contact .class-item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  padding: 14px 16px;
  border-left: 6px solid var(--bamboo);
}

.page-contact .class-item[open] summary {
  border-left-color: var(--signal);
}

.page-contact .class-item summary::-webkit-details-marker {
  display: none;
}

.page-contact .class-item__num {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  color: var(--card);
  background: var(--ink);
  padding: 2px 6px;
}

.page-contact .class-item__name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: clamp(16px, 2.4vw, 19px);
  color: var(--ink);
}

.page-contact .class-item__hint {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--muted);
  margin-left: auto;
}

.page-contact .class-item__body {
  padding: 4px 16px 16px;
  border-top: 1px solid var(--cell);
}

.page-contact .class-item__body p {
  font-size: 15px;
  color: var(--ink);
  margin: 12px 0 10px;
}

.page-contact .tpl {
  margin: 0;
  display: grid;
  gap: 8px;
}

.page-contact .tpl-row {
  display: grid;
  gap: 4px;
  padding: 10px 12px;
  background: var(--mist);
  border: 1px solid var(--cell);
}

.page-contact .tpl-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .tpl-val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 04 记录信息 ---------- */
.page-contact .record-card {
  display: grid;
  gap: 20px;
  border: var(--edge);
  background: var(--card);
  box-shadow: var(--shadow);
  padding: clamp(18px, 3.6vw, 34px);
}

.page-contact .legal-list {
  margin: 10px 0 0;
  display: grid;
  gap: 0;
}

.page-contact .legal-row {
  display: grid;
  gap: 4px;
  padding: 12px 0;
  border-bottom: 1px solid var(--grid);
}

.page-contact .legal-row:first-child {
  border-top: 1px solid var(--grid);
}

.page-contact .legal-key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

.page-contact .legal-row dd {
  margin: 0;
  font-family: var(--font-body);
  font-size: 15.5px;
  line-height: 1.7;
  color: var(--ink);
  word-break: break-word;
}

.page-contact .legal-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  word-break: break-all;
}

.page-contact .legal-note {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
}

.page-contact .record-card__fig {
  align-self: start;
}

/* ---------- 05 受理边界 ---------- */
.page-contact .scope-card {
  border: var(--edge);
  background: var(--ink);
  box-shadow: var(--shadow);
  padding: clamp(18px, 3.6vw, 34px);
}

.page-contact .scope-card .kicker {
  color: var(--cell);
}

.page-contact .scope-card h2 {
  color: var(--mist);
}

.page-contact .scope-card p {
  color: var(--cell);
}

.page-contact .scope-list {
  list-style: none;
  margin: 8px 0 18px;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .scope-list li {
  position: relative;
  padding-left: 20px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--signal);
}

.page-contact .scope-foot a {
  color: var(--haze);
  text-decoration: underline;
  text-decoration-color: var(--signal);
  text-underline-offset: 3px;
}

.page-contact .scope-foot {
  margin: 0;
  font-size: 14.5px;
  border-top: 1px solid var(--bamboo);
  padding-top: 14px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 680px) {
  .page-contact .contact-hero__meta {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .class-item__hint {
    margin-left: auto;
  }
}

@media (min-width: 900px) {
  .page-contact {
    --pc-gap: 18px;
  }

  .page-contact .contact-layout {
    grid-template-columns: 196px minmax(0, 1fr);
    gap: 24px;
    align-items: start;
  }

  .page-contact .contact-axis {
    position: sticky;
    top: calc(var(--topbar-h) + 20px);
  }

  .page-contact .frame-card__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: 26px;
    align-items: start;
  }

  .page-contact .record-card {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 26px;
    align-items: start;
  }

  .page-contact .scope-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px 24px;
  }
}

@media (min-width: 1120px) {
  .page-contact .contact-layout {
    grid-template-columns: 210px minmax(0, 1fr);
    gap: 32px;
  }

  .page-contact .contact-body {
    margin-right: clamp(0px, 3vw, 40px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .class-item {
    transition: none;
  }
}