.page-contact {
  --pc-pad: clamp(18px, 3vw, 32px);
  --pc-gap: clamp(12px, 2vw, 18px);
  padding-bottom: clamp(48px, 8vw, 96px);
}

.page-contact figure {
  margin: 0;
}

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

.page-contact .crumbs {
  margin-top: clamp(16px, 3vw, 26px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero h1 {
  font-family: var(--ff-serif);
  font-size: clamp(1.75rem, 5.4vw, 2.75rem);
  font-weight: 600;
  line-height: 1.2;
  letter-spacing: 0.01em;
  color: var(--c-ink);
  margin: 14px 0 18px;
  max-width: 640px;
}

.page-contact .contact-lede {
  margin: 0 0 clamp(24px, 4vw, 38px);
  max-width: 680px;
  color: var(--c-muted);
  font-size: var(--fs-16);
  line-height: 1.85;
}

.page-contact .contact-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .contact-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: var(--pc-pad);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
  overflow: hidden;
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(to right, var(--c-line) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(to bottom, var(--c-line) 0 1px, transparent 1px 26px);
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
  mask-image: linear-gradient(180deg, #000 0%, transparent 78%);
}

.page-contact .contact-card-key {
  position: relative;
  margin: 0;
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.page-contact .contact-card-val {
  position: relative;
  margin: 2px 0 0;
  font-family: var(--ff-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(0.98rem, 3.6vw, 1.5rem);
  line-height: 1.35;
  letter-spacing: 0.02em;
  color: var(--c-accent-soft);
  overflow-wrap: anywhere;
}

.page-contact .contact-card-note {
  position: relative;
  margin: 0;
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-contact .contact-meta {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin-top: var(--pc-gap);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-line);
  overflow: hidden;
}

.page-contact .contact-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 14px;
  min-width: 0;
  padding: 15px var(--pc-pad);
  background: var(--c-bg);
}

.page-contact .contact-meta-key {
  flex: none;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.page-contact .contact-meta-val {
  color: var(--c-ink);
  font-size: var(--fs-14);
  overflow-wrap: anywhere;
}

.page-contact .contact-visual {
  margin-top: clamp(20px, 3.4vw, 32px);
}

.page-contact .media-caption {
  margin-top: 10px;
  color: var(--c-muted);
  font-size: var(--fs-12);
  line-height: 1.6;
}

/* ---------- 章节头 ---------- */

.page-contact .chapter {
  margin-bottom: clamp(20px, 3.4vw, 30px);
  padding-top: clamp(18px, 3vw, 26px);
  border-top: 1px solid var(--c-line);
}

.page-contact .chapter-num {
  display: inline-block;
  margin-bottom: 12px;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  background: var(--c-paper);
  color: var(--c-bg);
  font-family: var(--ff-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-contact .chapter-title {
  margin: 0 0 10px;
  font-family: var(--ff-serif);
  font-size: clamp(1.25rem, 3.4vw, 1.75rem);
  font-weight: 600;
  line-height: 1.3;
  color: var(--c-ink);
}

.page-contact .chapter-note {
  margin: 0;
  max-width: 660px;
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-contact .subhead {
  margin: clamp(26px, 4vw, 38px) 0 14px;
  font-family: var(--ff-serif);
  font-size: var(--fs-20);
  font-weight: 600;
  color: var(--c-ink);
}

/* ---------- 提交要素清单 ---------- */

.page-contact .ask-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-line);
  overflow: hidden;
}

.page-contact .ask-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 4px 14px;
  min-width: 0;
  padding: clamp(16px, 2.6vw, 24px);
  background: var(--c-panel);
}

.page-contact .ask-num {
  padding-top: 3px;
  font-family: var(--ff-mono);
  font-variant-numeric: tabular-nums;
  font-size: var(--fs-12);
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--c-accent);
}

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

.page-contact .ask-title {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 7px;
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--c-ink);
}

.page-contact .ask-box {
  flex: none;
  width: 14px;
  height: 14px;
  border: 1px solid var(--c-dim);
  border-radius: 2px;
  background: var(--c-bg);
}

.page-contact .ask-text {
  margin: 0;
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.8;
}

/* ---------- 问题类型展开组 ---------- */

.page-contact .triage {
  display: grid;
  gap: 10px;
}

.page-contact .triage-item {
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
  overflow: hidden;
}

.page-contact .triage-sum {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: clamp(14px, 2.4vw, 20px) var(--pc-pad);
  list-style: none;
  cursor: pointer;
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--c-ink);
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .triage-sum::-webkit-details-marker {
  display: none;
}

.page-contact .triage-sum::after {
  content: "+";
  flex: none;
  font-family: var(--ff-mono);
  font-size: var(--fs-20);
  line-height: 1;
  color: var(--c-accent);
}

.page-contact .triage-item[open] .triage-sum::after {
  content: "−";
}

.page-contact .triage-item[open] .triage-sum {
  color: var(--c-accent-soft);
}

.page-contact .triage-sum:hover {
  background: var(--c-panel-deep);
}

.page-contact .triage-body {
  padding: 16px var(--pc-pad) clamp(16px, 2.6vw, 22px);
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-contact .triage-list {
  margin: 0;
  padding-left: 1.15em;
  display: grid;
  gap: 6px;
}

.page-contact .triage-tip {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-contact .inline-link {
  color: var(--c-accent);
  text-decoration: underline;
  text-decoration-color: var(--c-line);
  text-underline-offset: 3px;
  transition: text-decoration-color var(--dur) var(--ease);
}

.page-contact .inline-link:hover {
  text-decoration-color: var(--c-accent);
}

/* ---------- 响应时段 ---------- */

.page-contact .time-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 32px);
}

.page-contact .time-main {
  min-width: 0;
}

.page-contact .time-band {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-line);
  overflow: hidden;
}

.page-contact .time-cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: clamp(16px, 2.6vw, 22px) var(--pc-pad);
  background: var(--c-panel);
}

.page-contact .time-key {
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
  color: var(--c-muted);
}

.page-contact .time-val {
  font-family: var(--ff-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: var(--fs-20);
  letter-spacing: 0.02em;
  color: var(--c-accent-soft);
}

.page-contact .order-list {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .order-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.page-contact .order-idx {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border: 1px solid var(--c-line);
  border-radius: 50%;
  background: var(--c-panel);
  font-family: var(--ff-mono);
  font-size: var(--fs-12);
  font-weight: 700;
  color: var(--c-accent);
}

.page-contact .order-title {
  margin: 0 0 5px;
  font-size: var(--fs-16);
  font-weight: 600;
  color: var(--c-ink);
}

.page-contact .order-text {
  margin: 0;
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-contact .time-figure {
  min-width: 0;
}

/* ---------- 反馈与合作 ---------- */

.page-contact .feed-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .feed-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 0;
  padding: clamp(18px, 2.8vw, 26px);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
}

.page-contact .feed-tag {
  align-self: flex-start;
  margin: 0;
  padding: 3px 10px;
  border-radius: var(--r-sm);
  background: var(--c-paper);
  color: var(--c-bg);
  font-size: var(--fs-12);
  letter-spacing: 0.1em;
}

.page-contact .feed-title {
  margin: 0;
  font-family: var(--ff-serif);
  font-size: var(--fs-20);
  font-weight: 600;
  line-height: 1.4;
  color: var(--c-ink);
}

.page-contact .feed-text {
  margin: 0;
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.8;
}

.page-contact .feed-list {
  margin: 0;
  padding-left: 1.15em;
  display: grid;
  gap: 5px;
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.75;
}

.page-contact .feed-list li::marker {
  color: var(--c-dim);
}

/* ---------- 站点信息 ---------- */

.page-contact .id-card {
  padding: var(--pc-pad);
  border: 1px solid var(--c-line);
  border-radius: var(--r-md);
  background: var(--c-panel);
}

.page-contact .id-list {
  margin: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  border-radius: var(--r-sm);
  background: var(--c-line);
  overflow: hidden;
}

.page-contact .id-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 16px;
  min-width: 0;
  padding: 15px 16px;
  background: var(--c-panel);
}

.page-contact .id-key {
  flex: none;
  min-width: 5.4em;
  font-size: var(--fs-12);
  letter-spacing: 0.08em;
  color: var(--c-muted);
}

.page-contact .id-val {
  margin: 0;
  color: var(--c-ink);
  font-size: var(--fs-14);
  overflow-wrap: anywhere;
}

.page-contact .id-note {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--c-line);
  color: var(--c-muted);
  font-size: var(--fs-14);
  line-height: 1.85;
}

/* ---------- 动效 ---------- */

.page-contact [data-reveal] {
  animation: pc-rise 420ms var(--ease) both;
}

@keyframes pc-rise {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact [data-reveal] {
    animation: none;
  }
  .page-contact .triage-sum,
  .page-contact .inline-link {
    transition: none;
  }
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-contact .contact-meta {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .time-band {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 760px) {
  .page-contact .contact-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .feed-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 920px) {
  .page-contact .time-layout {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .contact-card {
    padding: clamp(24px, 2.4vw, 34px);
  }
}