.page-contact {
  --contact-ink-line: rgba(12, 20, 32, 0.12);
  --contact-ink-line-soft: rgba(12, 20, 32, 0.07);
  background: var(--indigo-night);
  color: var(--text-on-dark);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: 26px 0 52px;
  background:
    radial-gradient(120% 88% at 82% 4%, rgba(217, 152, 54, 0.16), transparent 62%),
    linear-gradient(180deg, var(--indigo-night) 0%, var(--indigo-deep) 100%);
  border-bottom: 1px solid var(--line-warm);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(42, 65, 102, 0.28) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(42, 65, 102, 0.28) 1px, transparent 1px);
  background-size: 72px 72px;
  opacity: 0.5;
  pointer-events: none;
}

.page-contact .contact-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 30px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

.page-contact .crumbs a {
  color: var(--amber);
  text-decoration: none;
}

.page-contact .crumbs a:hover,
.page-contact .crumbs a:focus-visible {
  color: var(--amber-bright);
  text-decoration: underline;
}

.page-contact .crumbs__sep {
  color: var(--text-on-dark-dim);
}

.page-contact .crumbs [aria-current="page"] {
  color: var(--text-on-dark-dim);
}

.page-contact .hero-grid {
  display: grid;
  gap: 34px;
}

.page-contact .eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding-left: 34px;
  position: relative;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  color: var(--amber);
}

.page-contact .eyebrow::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 24px;
  height: 1px;
  background: var(--amber);
}

.page-contact h1 {
  margin: 0 0 18px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(30px, 7vw, 46px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper-yellow);
}

.page-contact .hero-lead {
  margin: 0;
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--text-on-dark);
}

.page-contact .reach-grid {
  display: grid;
  gap: 14px;
  margin-top: 32px;
}

.page-contact .reach-card {
  display: grid;
  gap: 8px;
  padding: 20px 20px 22px;
  border: 1px solid var(--line-warm);
  border-left: 3px solid var(--amber);
  border-radius: 2px;
  background: linear-gradient(158deg, rgba(42, 65, 102, 0.72), rgba(27, 44, 75, 0.5));
  color: inherit;
  text-decoration: none;
  transition: border-color 0.16s var(--ease-page), transform 0.24s var(--ease-page);
}

.page-contact .reach-card:hover,
.page-contact .reach-card:focus-visible {
  border-color: var(--amber-bright);
  border-left-color: var(--amber-bright);
  transform: translateY(-2px);
}

.page-contact .reach-card__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--amber);
}

.page-contact .reach-card__value {
  display: block;
  line-height: 1.35;
}

.page-contact .reach-card__value--mail {
  font-family: var(--font-mono);
  font-size: clamp(14px, 4.2vw, 19px);
  letter-spacing: -0.015em;
  word-break: break-all;
  color: var(--paper-white);
}

.page-contact .reach-card__value--tel {
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(27px, 7.5vw, 38px);
  letter-spacing: 0.01em;
  color: var(--paper-yellow);
}

.page-contact .reach-card__note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--text-on-dark-dim);
}

.page-contact .hero-tip {
  margin: 24px 0 0;
  padding-left: 16px;
  border-left: 2px solid var(--signal-orange);
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-on-dark-dim);
}

.page-contact .hero-figure {
  position: relative;
  margin: 0;
}

.page-contact .hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--line-warm);
  border-radius: 2px;
  box-shadow: var(--shadow-paper);
}

/* ---------- 浅色正文区 ---------- */
.page-contact .contact-body {
  background: var(--paper-yellow);
  color: var(--ink);
  padding: 10px 0 54px;
}

.page-contact .contact-section {
  padding: 42px 0;
  border-top: 1px solid var(--contact-ink-line);
}

.page-contact .contact-section:first-child {
  border-top: 0;
}

.page-contact .section-num {
  display: block;
  margin-bottom: 10px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.18em;
  color: var(--indigo-mid);
}

.page-contact h2 {
  position: relative;
  margin: 0;
  padding-bottom: 14px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(22px, 4.4vw, 28px);
  line-height: 1.35;
  letter-spacing: -0.005em;
  color: var(--ink);
}

.page-contact h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 2px;
  background: var(--amber);
}

.page-contact .lead-line {
  margin: 0;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

.page-contact .tail-line {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--rock-gray);
}

.page-contact .contact-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
}

.page-contact .contact-list li {
  position: relative;
  padding: 13px 0 13px 24px;
  border-bottom: 1px dashed var(--contact-ink-line);
  font-size: 16px;
  line-height: 1.75;
  color: var(--rock-gray);
}

.page-contact .contact-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 23px;
  width: 11px;
  height: 1px;
  background: var(--amber);
}

.page-contact .contact-list strong {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 反馈模板 ---------- */
.page-contact .feedback-template {
  margin: 22px 0 0;
  padding: 22px 20px;
  border: 1px solid var(--line-warm);
  border-left: 3px solid var(--signal-orange);
  border-radius: 2px;
  background: var(--indigo-night);
  color: var(--text-on-dark);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.95;
  white-space: pre-wrap;
  word-break: break-word;
  overflow-x: auto;
}

.page-contact .feedback-template:focus-visible {
  outline: 2px solid var(--amber-bright);
  outline-offset: 3px;
}

/* ---------- 合作与纠错 ---------- */
.page-contact .matter {
  margin-top: 14px;
  border: 1px solid var(--contact-ink-line);
  border-radius: 2px;
  background: var(--paper-white);
  box-shadow: var(--shadow-paper);
}

.page-contact .matter[open] {
  border-color: var(--amber);
}

.page-contact .matter > summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-title);
  font-weight: 700;
  font-size: 18px;
  line-height: 1.5;
  color: var(--ink);
}

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

.page-contact .matter > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 400;
  color: var(--amber);
  transition: transform 0.2s var(--ease-page);
}

.page-contact .matter[open] > summary::after {
  content: "–";
}

.page-contact .matter__hint {
  flex: 1 1 100%;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 13.5px;
  letter-spacing: 0;
  color: var(--rock-gray);
}

.page-contact .matter__body {
  padding: 0 18px 20px;
  border-top: 1px solid var(--contact-ink-line-soft);
  margin-top: 2px;
}

.page-contact .matter__body p {
  margin: 16px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--rock-gray);
}

.page-contact .matter-list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-contact .matter-list li {
  position: relative;
  padding: 8px 0 8px 20px;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink);
  border-bottom: 1px solid var(--contact-ink-line-soft);
}

.page-contact .matter-list li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--signal-orange);
  font-weight: 700;
}

/* ---------- 地址 ---------- */
.page-contact .addr-grid {
  display: grid;
  gap: 26px;
  align-items: center;
}

.page-contact .addr-line {
  margin: 0 0 16px;
  font-family: var(--font-title);
  font-weight: 800;
  font-size: clamp(20px, 4.6vw, 26px);
  line-height: 1.5;
  color: var(--indigo-mid);
}

.page-contact .addr-copy p {
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--rock-gray);
  margin: 0 0 12px;
}

.page-contact .geo-figure {
  margin: 0;
  border: 1px solid var(--contact-ink-line);
  border-radius: 2px;
  overflow: hidden;
  background: var(--indigo-deep);
}

.page-contact .geo-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 2 / 1;
  object-fit: cover;
}

/* ---------- 相关去处与备案 ---------- */
.page-contact .cross-links {
  display: grid;
  gap: 1px;
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid var(--contact-ink-line);
  grid-template-columns: 1fr;
}

.page-contact .cross-links a {
  display: block;
  padding: 14px 4px 14px 18px;
  position: relative;
  border-bottom: 1px solid var(--contact-ink-line-soft);
  font-size: 15px;
  color: var(--indigo-mid);
  text-decoration: none;
  transition: color 0.16s var(--ease-page), padding-left 0.2s var(--ease-page);
}

.page-contact .cross-links a::before {
  content: "→";
  position: absolute;
  left: 0;
  font-family: var(--font-mono);
  color: var(--amber);
}

.page-contact .cross-links a:hover,
.page-contact .cross-links a:focus-visible {
  color: var(--signal-orange);
  padding-left: 24px;
}

.page-contact .record-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 22px;
  margin: 26px 0 0;
  padding-top: 16px;
  border-top: 2px solid var(--amber);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock-gray);
}

/* ---------- 桌面端 ---------- */
@media (min-width: 720px) {
  .page-contact .reach-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .cross-links {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 0 24px;
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero {
    padding: 34px 0 72px;
  }

  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: end;
    gap: 44px;
  }

  .page-contact .hero-figure::after {
    content: "";
    position: absolute;
    right: -14px;
    bottom: -14px;
    width: 58%;
    height: 58%;
    border-right: 1px solid var(--amber);
    border-bottom: 1px solid var(--amber);
    opacity: 0.6;
    pointer-events: none;
  }

  .page-contact .contact-section {
    display: grid;
    grid-template-columns: 208px minmax(0, 1fr);
    gap: 24px 44px;
    padding: 52px 0;
  }

  .page-contact .section-head {
    position: sticky;
    top: 32px;
    align-self: start;
  }

  .page-contact .addr-grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 40px;
  }

  .page-contact .cross-links {
    grid-template-columns: repeat(5, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .reach-card,
  .page-contact .cross-links a,
  .page-contact .matter > summary::after {
    transition: none;
  }

  .page-contact .reach-card:hover,
  .page-contact .reach-card:focus-visible {
    transform: none;
  }
}