.page-contact {
  --pc-hair: rgba(11, 43, 91, 0.18);
  --pc-navy-shadow: 0 2px 0 rgba(11, 43, 91, 0.1), 0 22px 34px -22px rgba(11, 43, 91, 0.7);
  padding-bottom: var(--s6);
  background: var(--paper);
  color: var(--ink);
}

.page-contact .breadcrumbs ol {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s1);
  margin: 0;
  padding: var(--s3) 0 0;
  list-style: none;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .breadcrumbs li + li::before {
  content: "/";
  margin-right: var(--s1);
  font-family: var(--font-mono);
  color: var(--gold);
}

.page-contact .breadcrumbs a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

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

/* ---------- 首屏框景 ---------- */
.page-contact .contact-hero {
  padding-top: var(--s3);
}

.page-contact .contact-hero__frame {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--s3);
  padding: var(--s4) var(--s3) var(--s3);
  background: var(--white);
  border: 2px solid var(--navy);
  box-shadow: var(--shadow-card);
}

.page-contact .contact-hero__frame::after {
  content: "";
  position: absolute;
  inset: 14px;
  border: 1px solid var(--pc-hair);
  pointer-events: none;
}

.page-contact .contact-hero__stripe {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 10px;
  background-image: repeating-conic-gradient(var(--red) 0% 25%, var(--white) 0% 50%);
  background-size: 10px 10px;
}

.page-contact .contact-hero__body,
.page-contact .contact-hero__figure {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__title {
  margin: var(--s2) 0;
  font-family: var(--font-head);
  font-size: clamp(1.7rem, 6.2vw, 2.6rem);
  font-weight: 900;
  line-height: 1.18;
  letter-spacing: -0.02em;
  color: var(--navy);
}

.page-contact .contact-hero__hint {
  margin: var(--s3) 0 0;
  padding-left: var(--s2);
  border-left: 3px solid var(--gold);
  font-size: 0.9rem;
  line-height: 1.75;
  color: var(--muted);
}

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

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

/* ---------- 三个渠道 ---------- */
.page-contact .contact-channels {
  padding-top: var(--s6);
}

.page-contact .contact-cards {
  display: grid;
  gap: var(--s3);
  margin-top: var(--s4);
}

.page-contact .contact-card {
  --pc-base: 0px;
  --pc-lift: 0px;
  --pc-tilt: 0deg;
  position: relative;
  padding: var(--s4) var(--s3) var(--s3);
  background: var(--white);
  border: 1px solid var(--pc-hair);
  box-shadow: var(--shadow-card);
  transform: translateY(calc(var(--pc-base) + var(--pc-lift))) rotate(var(--pc-tilt));
  transition: transform 180ms ease-out, box-shadow 180ms ease-out, border-color 180ms ease-out;
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--red);
  transition: background 180ms ease-out;
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  --pc-lift: -8px;
  --pc-tilt: 0deg;
  border-color: var(--navy);
  box-shadow: var(--pc-navy-shadow);
}

.page-contact .contact-card:hover::before,
.page-contact .contact-card:focus-within::before {
  background: var(--gold);
}

.page-contact .contact-card__corner {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 22px;
  height: 22px;
  background-image: repeating-conic-gradient(var(--red) 0% 25%, var(--white) 0% 50%);
  background-size: 11px 11px;
  border: 1px solid var(--pc-hair);
  transition: transform 180ms ease-out;
}

.page-contact .contact-card:hover .contact-card__corner,
.page-contact .contact-card:focus-within .contact-card__corner {
  transform: translate(3px, -3px);
}

.page-contact .contact-card__label {
  margin: 0 0 var(--s1);
  padding-right: var(--s4);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .contact-card__value {
  margin: 0 0 var(--s2);
  font-size: clamp(0.95rem, 3.8vw, 1.1rem);
  font-weight: 700;
  line-height: 1.45;
  color: var(--navy);
  overflow-wrap: anywhere;
}

.page-contact .contact-card__use {
  margin: 0;
  font-size: 0.92rem;
  line-height: 1.78;
  color: var(--ink);
}

/* ---------- 棋盘格分隔带 ---------- */
.page-contact .pc-band {
  height: 8px;
  margin-top: var(--s6);
  background-image: repeating-conic-gradient(var(--red) 0% 25%, var(--white) 0% 50%);
  background-size: 8px 8px;
  opacity: 0.9;
}

/* ---------- 写信指引 ---------- */
.page-contact .contact-howto {
  padding-top: var(--s5);
}

.page-contact .contact-howto__grid {
  display: grid;
  gap: var(--s4);
  margin-top: var(--s4);
}

.page-contact .contact-steps {
  counter-reset: pc-step;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-steps > li {
  position: relative;
  padding: var(--s3) 0 var(--s3) 52px;
  border-top: 1px solid var(--pc-hair);
}

.page-contact .contact-steps > li:last-child {
  border-bottom: 1px solid var(--pc-hair);
}

.page-contact .contact-steps > li::before {
  counter-increment: pc-step;
  content: "0" counter(pc-step);
  position: absolute;
  left: 0;
  top: var(--s3);
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--red);
}

.page-contact .contact-steps__title {
  display: block;
  margin-bottom: var(--s1);
  font-size: 1.02rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--navy);
}

.page-contact .contact-steps__text {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.78;
}

.page-contact .contact-howto__aside {
  display: grid;
  gap: var(--s3);
  align-content: start;
}

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

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

.page-contact .contact-annotation {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

/* ---------- 常见咨询类型 ---------- */
.page-contact .contact-topics {
  padding-top: var(--s6);
}

.page-contact .section-head__meta a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-contact .section-head__meta a:hover,
.page-contact .section-head__meta a:focus-visible {
  color: var(--red);
}

.page-contact .contact-topics__list {
  display: grid;
  gap: var(--s2);
  margin-top: var(--s4);
}

.page-contact .contact-topic {
  background: var(--white);
  border: 1px solid var(--pc-hair);
  border-left: 4px solid var(--navy);
  transition: border-color 160ms ease-out;
}

.page-contact .contact-topic[open] {
  border-left-color: var(--red);
}

.page-contact .contact-topic > summary {
  display: flex;
  align-items: center;
  gap: var(--s2);
  padding: var(--s2) var(--s3);
  cursor: pointer;
  list-style: none;
  font-size: 0.97rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--navy);
  transition: background 160ms ease-out, color 160ms ease-out;
}

.page-contact .contact-topic > summary::-webkit-details-marker {
  display: none;
}

.page-contact .contact-topic > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 1.1rem;
  color: var(--red);
}

.page-contact .contact-topic > summary:hover {
  background: var(--paper-2);
}

.page-contact .contact-topic > summary:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: -2px;
}

.page-contact .contact-topic[open] > summary {
  background: var(--navy);
  color: var(--white);
}

.page-contact .contact-topic[open] > summary:hover {
  background: var(--navy-deep);
}

.page-contact .contact-topic[open] > summary::after {
  content: "\2013";
  color: var(--gold);
}

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

.page-contact .contact-topic__body {
  padding: var(--s3);
  border-top: 1px solid var(--pc-hair);
  font-size: 0.93rem;
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .contact-topic__body p {
  margin: 0 0 var(--s2);
}

.page-contact .contact-topic__body p:last-child {
  margin-bottom: 0;
}

.page-contact .contact-topic__body a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-contact .contact-topic__body a:hover,
.page-contact .contact-topic__body a:focus-visible {
  color: var(--red);
  border-bottom-color: var(--red);
}

/* ---------- 纠错流程 ---------- */
.page-contact .contact-correction {
  padding-top: var(--s6);
}

.page-contact .contact-correction__panel {
  display: grid;
  gap: var(--s3);
  margin-top: var(--s4);
  padding: var(--s4) var(--s3);
  background: var(--paper-2);
  border-top: 4px solid var(--red);
}

.page-contact .contact-correction__main p {
  margin: 0 0 var(--s3);
  font-size: 0.98rem;
  line-height: 1.8;
}

.page-contact .contact-correction__main p:last-child {
  margin-bottom: 0;
}

.page-contact .contact-correction__main a {
  color: var(--navy);
  text-decoration: none;
  border-bottom: 1px solid var(--gold);
}

.page-contact .contact-correction__main a:hover,
.page-contact .contact-correction__main a:focus-visible {
  color: var(--red);
}

.page-contact .contact-correction__side-title {
  margin: 0 0 var(--s3);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--navy);
  text-transform: uppercase;
}

.page-contact .contact-correction__list {
  display: grid;
  gap: var(--s2);
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-correction__list li {
  position: relative;
  padding-left: var(--s3);
  font-size: 0.93rem;
  line-height: 1.7;
}

.page-contact .contact-correction__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  background: var(--red);
}

/* ---------- 备案与站点信息 ---------- */
.page-contact .contact-meta {
  padding-top: var(--s6);
}

.page-contact .contact-meta__panel {
  display: grid;
  gap: var(--s3);
  margin-top: var(--s4);
  padding: var(--s4) var(--s3);
  background: var(--navy);
  color: var(--white);
  box-shadow: var(--pc-navy-shadow);
}

.page-contact .contact-meta__dl {
  display: grid;
  gap: var(--s3);
  margin: 0;
}

.page-contact .contact-meta__dl dt {
  margin-bottom: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--gold);
}

.page-contact .contact-meta__dl dd {
  margin: 0;
  font-size: 0.97rem;
  line-height: 1.7;
  color: var(--white);
}

.page-contact .contact-meta__note {
  margin: 0;
  padding-top: var(--s3);
  border-top: 1px solid var(--hair-light);
  font-size: 0.93rem;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.86);
}

/* ---------- 其他入口 ---------- */
.page-contact .contact-help {
  padding-top: var(--s6);
}

.page-contact .contact-help__links {
  display: flex;
  flex-wrap: wrap;
  gap: var(--s2);
  margin: var(--s4) 0 0;
  padding: 0;
  list-style: none;
}

/* ---------- 断点 ---------- */
@media (min-width: 620px) {
  .page-contact .contact-topics__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: var(--s3);
  }

  .page-contact .contact-steps > li {
    padding-left: 66px;
  }

  .page-contact .contact-hero__frame {
    padding: var(--s5) var(--s4) var(--s4);
  }
}

@media (min-width: 860px) {
  .page-contact .contact-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--s3);
    align-items: start;
    padding-bottom: var(--s4);
  }

  .page-contact .contact-card:nth-child(1) {
    --pc-base: 0px;
    --pc-tilt: -0.8deg;
  }

  .page-contact .contact-card:nth-child(2) {
    --pc-base: 26px;
    --pc-tilt: 0.7deg;
  }

  .page-contact .contact-card:nth-child(3) {
    --pc-base: 52px;
    --pc-tilt: -0.5deg;
  }

  .page-contact .contact-correction__panel {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: var(--s5);
    padding: var(--s5) var(--s4);
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__frame {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: var(--s5);
    align-items: center;
  }

  .page-contact .contact-howto__grid {
    grid-template-columns: minmax(0, 1.2fr) minmax(0, 0.8fr);
    gap: var(--s5);
    align-items: start;
  }

  .page-contact .contact-howto__aside {
    display: flex;
    gap: var(--s3);
    align-items: flex-start;
  }

  .page-contact .contact-annotation {
    writing-mode: vertical-rl;
    order: -1;
  }

  .page-contact .contact-meta__panel {
    padding: var(--s5) var(--s4);
  }

  .page-contact .contact-meta__dl {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .contact-card__corner,
  .page-contact .contact-topic,
  .page-contact .contact-topic > summary {
    transition: none;
  }

  .page-contact .contact-card:hover,
  .page-contact .contact-card:focus-within {
    --pc-lift: 0px;
    --pc-tilt: 0deg;
  }

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