/* ============ 联络与反馈 · 页面专属样式 ============ */

.page-contact {
  --pc-line: rgba(31, 23, 18, 0.16);
  --pc-line-strong: rgba(31, 23, 18, 0.36);
  --pc-grid: rgba(159, 192, 255, 0.12);

  position: relative;
  background-color: var(--cream);
  color: var(--ink);
  font-family: var(--font-body);
  line-height: 1.75;
}

.page-contact a {
  color: var(--electric);
  text-decoration: none;
  border-bottom: 1px solid rgba(43, 109, 246, 0.4);
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact a:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding: 34px 0 32px;
  background-color: var(--deep);
  background-image:
    linear-gradient(var(--pc-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--pc-grid) 1px, transparent 1px);
  background-size: 48px 48px;
  color: var(--cream);
}

.page-contact .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 20px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact .breadcrumb a {
  color: var(--mist);
  border-bottom: 1px solid transparent;
}

.page-contact .breadcrumb a:hover {
  color: var(--gold);
  border-bottom-color: var(--gold);
}

.page-contact .breadcrumb span[aria-hidden="true"] {
  color: var(--slate);
}

.page-contact .contact-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-contact .contact-hero h1 {
  margin: 12px 0 16px;
  max-width: 22ch;
  font-size: 28px;
  font-weight: 900;
  line-height: 1.3;
  letter-spacing: 0.06em;
  color: var(--cream);
}

.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .contact-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-hero__facts li {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 132px;
  padding: 11px 15px;
  border: 1px solid var(--rail-line);
  background-color: rgba(159, 192, 255, 0.07);
}

.page-contact .contact-hero__num {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--gold);
}

.page-contact .contact-hero__cap {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--mist);
  opacity: 0.8;
}

/* ---------- 通用章节标题 ---------- */

.page-contact .section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 22px;
  padding-bottom: 11px;
  border-bottom: 1px solid var(--pc-line-strong);
}

.page-contact .section-head__num {
  flex: 0 0 auto;
  padding: 3px 8px;
  border-radius: 2px;
  background-color: rgba(43, 109, 246, 0.1);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--electric);
}

.page-contact .section-head h2 {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--ink);
}

/* ---------- 01 联络通道 ---------- */

.page-contact .channel-section {
  padding-top: 44px;
  padding-bottom: 8px;
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .channel-card {
  position: relative;
  padding: 22px 18px 18px;
  border: 1px solid var(--pc-line-strong);
  background-color: var(--cream);
  box-shadow: 5px 5px 0 rgba(31, 23, 18, 0.1);
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease);
}

.page-contact .channel-card:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(43, 109, 246, 0.2);
}

.page-contact .channel-card__no {
  display: inline-block;
  margin-bottom: 14px;
  padding: 2px 8px;
  background-color: var(--gold);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--ink);
}

.page-contact .channel-card__title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--ink);
}

.page-contact .channel-card__value {
  margin: 0 0 12px;
  padding-left: 10px;
  border-left: 3px solid var(--electric);
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--deep);
  word-break: break-word;
}

.page-contact .channel-card__use {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--slate);
}

.page-contact .channel-figure {
  margin: 0;
  border: 1px solid var(--pc-line-strong);
  background-color: var(--paper);
  overflow: hidden;
}

.page-contact .channel-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 14 / 9;
  object-fit: cover;
}

.page-contact .channel-figure__cap {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--slate);
  background-color: var(--paper);
}

/* ---------- 02 受理边界 ---------- */

.page-contact .boundary {
  padding-top: 38px;
  padding-bottom: 8px;
}

.page-contact .boundary-band {
  border-left: 6px solid var(--gold);
  background-color: var(--deep);
}

.page-contact .boundary-band__row {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 15px 18px;
  border-bottom: 1px solid var(--rail-line);
}

.page-contact .boundary-band__row:last-child {
  border-bottom: 0;
}

.page-contact .boundary-band__key {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-contact .boundary-band__row p {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .boundary-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 03 数据纠错要素 ---------- */

.page-contact .correction {
  padding-top: 38px;
  padding-bottom: 8px;
}

.page-contact .correction-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .correction-intro {
  margin: 0 0 16px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink);
}

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

.page-contact .check-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 13px 15px;
  border: 1px solid var(--pc-line);
  border-left: 3px solid var(--tropic);
  background-color: var(--paper);
  font-size: 13.5px;
  line-height: 1.78;
  color: var(--ink);
}

.page-contact .check-list__box {
  position: relative;
  flex: 0 0 16px;
  width: 16px;
  height: 16px;
  margin-top: 4px;
  border: 1.5px solid var(--slate);
  border-radius: 2px;
  background-color: var(--cream);
}

.page-contact .check-list__box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 4px;
  height: 8px;
  border-right: 2px solid var(--tropic);
  border-bottom: 2px solid var(--tropic);
  transform: rotate(45deg);
}

.page-contact .check-list b {
  font-weight: 700;
  color: var(--deep);
}

.page-contact .template-card {
  margin-top: 18px;
  border: 1px dashed var(--pc-line-strong);
  background-color: var(--cream);
}

.page-contact .template-card__label {
  margin: 0;
  padding: 8px 14px;
  background-color: var(--deep);
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-contact .template-card__body {
  margin: 0;
  padding: 15px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.95;
  color: var(--ink);
  white-space: pre-wrap;
  word-break: break-word;
}

.page-contact .correction-figure {
  margin: 0;
  border: 1px solid var(--pc-line-strong);
  background-color: var(--paper);
  overflow: hidden;
}

.page-contact .correction-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .correction-figure__cap {
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--slate);
  background-color: var(--paper);
}

/* ---------- 04 补充与引用 ---------- */

.page-contact .supplement {
  padding-top: 38px;
  padding-bottom: 8px;
}

.page-contact .supplement-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.page-contact .supplement-card {
  padding: 20px 18px;
  border: 1px solid var(--pc-line-strong);
  background-color: var(--cream);
  box-shadow: 4px 4px 0 rgba(31, 23, 18, 0.08);
}

.page-contact .supplement-card h3 {
  margin: 12px 0 12px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink);
}

.page-contact .supplement-card p {
  margin: 0 0 10px;
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--ink);
}

.page-contact .supplement-card p:last-child {
  margin-bottom: 0;
  color: var(--slate);
}

.page-contact .supplement-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 05 处理流程 ---------- */

.page-contact .flow-section {
  padding-top: 38px;
  padding-bottom: 56px;
}

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

.page-contact .flow__item {
  border: 1px solid var(--pc-line-strong);
  background-color: var(--cream);
}

.page-contact .flow__item .expander {
  border: 0;
  background: none;
}

.page-contact .flow__btn {
  display: flex;
  align-items: center;
  gap: 12px;
  width: 100%;
  padding: 14px 16px;
  border: 0;
  background-color: var(--cream);
  text-align: left;
  cursor: pointer;
  font-family: inherit;
  color: var(--ink);
  transition: background-color 0.24s var(--ease);
}

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

.page-contact .flow__num {
  flex: 0 0 auto;
  padding: 3px 8px;
  background-color: var(--deep);
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--gold);
}

.page-contact .flow__name {
  flex: 1 1 auto;
  font-size: 15.5px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.page-contact .flow__hint {
  display: none;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--slate);
}

.page-contact .flow__btn .expander__sign {
  flex: 0 0 auto;
  color: var(--electric);
}

.page-contact .flow__item .expander__inner {
  padding: 0 16px 16px;
  border-top: 1px solid var(--pc-line);
}

.page-contact .flow__item .expander__inner p {
  margin: 14px 0 0;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--slate);
}

.page-contact .flow-note {
  margin: 18px 0 0;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--slate);
}

/* ---------- 桌面增强 ---------- */

@media (min-width: 700px) {
  .page-contact .contact-hero {
    padding: 52px 0 46px;
  }

  .page-contact .contact-hero h1 {
    font-size: 40px;
    letter-spacing: 0.08em;
  }

  .page-contact .contact-hero__lead {
    font-size: 16px;
  }

  .page-contact .section-head h2 {
    font-size: 23px;
  }

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

  .page-contact .channel-figure {
    grid-column: 1 / -1;
  }

  .page-contact .boundary-band__row {
    flex-direction: row;
    align-items: baseline;
    gap: 22px;
    padding: 16px 22px;
  }

  .page-contact .boundary-band__key {
    flex: 0 0 60px;
  }

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

  .page-contact .flow__hint {
    display: inline;
  }

  .page-contact .flow__btn {
    padding: 15px 20px;
    gap: 16px;
  }

  .page-contact .flow__item .expander__inner {
    padding: 0 20px 18px 78px;
  }
}

@media (min-width: 1024px) {
  .page-contact .channel-section {
    padding-top: 56px;
  }

  .page-contact .correction-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 30px;
    align-items: start;
  }

  .page-contact .correction-figure {
    position: sticky;
    top: 24px;
  }

  .page-contact .supplement-card {
    padding: 24px 22px;
  }

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

  .page-contact .flow__item {
    display: flex;
  }

  .page-contact .flow__item .expander {
    display: flex;
    flex-direction: column;
    width: 100%;
  }
}

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

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