.page-contact {
  background: var(--space);
  color: var(--ink);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  padding: 88px 0 56px;
  overflow: hidden;
}

.page-contact .contact-hero__img {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.42;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    linear-gradient(180deg, rgba(6, 16, 35, 0.62) 0%, rgba(11, 27, 58, 0.86) 54%, var(--space) 100%);
}

.page-contact .contact-orbit {
  position: absolute;
  left: -6%;
  right: -6%;
  top: 68%;
  z-index: -1;
  height: 1px;
  background: linear-gradient(90deg, transparent 0%, var(--cyan) 22%, var(--magenta) 64%, transparent 98%);
  opacity: 0.55;
  transform: rotate(-2.6deg);
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}

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

.page-contact .breadcrumb a:hover {
  text-decoration: underline;
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 20ch;
  font-family: var(--font-display);
  font-size: clamp(38px, 8.4vw, 70px);
  font-weight: 700;
  line-height: 1.03;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--ink);
}

.page-contact .contact-hero .lede {
  margin: 20px 0 0;
  max-width: 40ch;
  font-size: 17px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

/* ---------- 渠道矩阵 ---------- */
.page-contact .contact-channels {
  padding-top: 8px;
}

.page-contact .contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 34px;
}

.page-contact .contact-card {
  --cut: 16px;
  position: relative;
  padding: 26px 22px 24px;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - var(--cut)), calc(100% - var(--cut)) 100%, 0 100%);
  transition: background 240ms ease, transform 240ms ease;
}

.page-contact .contact-card--email {
  background: linear-gradient(152deg, #1b3a6b 0%, #14294f 58%, #102244 100%);
}

.page-contact .contact-card--email::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(var(--cyan), var(--cyan)) top left / 100% 2px no-repeat,
    linear-gradient(var(--cyan), var(--cyan)) top left / 2px 100% no-repeat;
  opacity: 0.68;
}

.page-contact .contact-card:focus-within,
.page-contact .contact-card:hover {
  background: linear-gradient(152deg, #1f4179 0%, #17305a 60%, #12264c 100%);
}

.page-contact .contact-card__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-contact .contact-card__title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-size: clamp(22px, 5vw, 27px);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--ink);
}

.page-contact .contact-card__value {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--cyan);
  word-break: break-word;
}

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

.page-contact .contact-card__value--addr {
  font-style: normal;
  color: var(--muted);
}

.page-contact .contact-card__desc {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .contact-card__hint {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  letter-spacing: 0.03em;
  color: var(--line);
  transition: color 240ms ease;
}

.page-contact .contact-card:hover .contact-card__hint,
.page-contact .contact-card:focus-within .contact-card__hint {
  color: var(--cyan);
}

.page-contact .copy-btn {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 8px), calc(100% - 8px) 100%, 0 100%);
  transition: border-color 200ms ease, color 200ms ease, background 200ms ease;
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

.page-contact .copy-btn.is-copied {
  border-color: var(--green);
  color: var(--deep-ink);
  background: var(--green);
}

.page-contact .contact-note {
  margin: 28px 0 0;
  padding: 16px 18px;
  border-left: 2px solid var(--magenta);
  background: rgba(6, 16, 35, 0.6);
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 分诊图 ---------- */
.page-contact .contact-map__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
}

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

.page-contact .contact-map__figure .media__frame {
  position: relative;
  overflow: hidden;
  background: var(--panel);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 22px), calc(100% - 22px) 100%, 0 100%);
}

.page-contact .contact-map__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: 0.86;
}

.page-contact .contact-map__copy p {
  margin: 0 0 14px;
  font-size: 16px;
  line-height: 1.82;
  color: var(--muted);
}

.page-contact .contact-map__copy .section__title {
  margin: 6px 0 18px;
}

.page-contact .contact-map__copy .btn {
  margin-top: 8px;
}

/* ---------- 写邮件 ---------- */
.page-contact .contact-mail__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin-top: 32px;
}

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

.page-contact .contact-steps > li {
  position: relative;
  counter-increment: cs;
  padding: 20px 0 20px 54px;
  border-top: 1px solid var(--line-soft);
}

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

.page-contact .contact-steps > li::before {
  content: counter(cs, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 22px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.08em;
  color: var(--gold);
}

.page-contact .contact-steps h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-contact .contact-steps p {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-sample {
  padding: 24px 22px;
  background: var(--deep-ink);
  border-left: 2px solid var(--cyan);
}

.page-contact .contact-sample__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--muted);
}

.page-contact .contact-sample__title {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.75;
  color: var(--gold);
  word-break: break-word;
}

.page-contact .contact-sample__body {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 合作 ---------- */
.page-contact .contact-steps--tight > li {
  padding-top: 18px;
  padding-bottom: 18px;
}

/* ---------- 反馈 ---------- */
.page-contact .contact-acc {
  margin-top: 30px;
}

.page-contact .contact-detail {
  border-top: 1px solid var(--line-soft);
  background: transparent;
}

.page-contact .contact-detail:last-of-type {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .contact-detail summary {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 20px 4px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .contact-detail__num {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--gold);
}

.page-contact .contact-detail__name {
  flex: 1 1 180px;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--ink);
}

.page-contact .contact-detail__tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  padding: 3px 10px;
  color: var(--deep-ink);
  background: var(--cyan);
}

.page-contact .contact-detail[open] summary .contact-detail__name {
  color: var(--cyan);
}

.page-contact .contact-detail__body {
  padding: 0 4px 22px;
}

.page-contact .contact-detail__body p {
  margin: 0;
  max-width: 60ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .contact-feedback__foot {
  margin: 26px 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.82;
  color: var(--muted);
}

/* ---------- 到访 ---------- */
.page-contact .contact-list--page {
  margin: 30px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-list--page .contact-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 16px;
  padding: 18px 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .contact-list--page .contact-row:last-child {
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .contact-list--page .contact-row__label {
  flex: 0 0 108px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .contact-list--page .contact-row__value {
  flex: 1 1 220px;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  word-break: break-word;
}

/* ---------- 结尾行动 ---------- */
.page-contact .contact-cta__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: center;
  padding-top: 30px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .contact-cta__inner .section__title {
  margin: 6px 0 10px;
}

.page-contact .contact-cta__inner p {
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-cta__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 桌面端 ---------- */
@media (min-width: 900px) {
  .page-contact .contact-hero {
    padding: 120px 0 88px;
  }

  .page-contact .contact-hero .lede {
    font-size: 18px;
  }

  .page-contact .contact-grid {
    grid-template-columns: 1.55fr 1fr 0.85fr;
    align-items: start;
    gap: 22px;
  }

  .page-contact .contact-card {
    padding: 32px 28px 30px;
  }

  .page-contact .contact-map__inner {
    grid-template-columns: 1.25fr 1fr;
    gap: 48px;
    align-items: center;
  }

  .page-contact .contact-mail__grid {
    grid-template-columns: 1.6fr 1fr;
    gap: 46px;
    align-items: start;
  }

  .page-contact .contact-cta__inner {
    grid-template-columns: 1fr auto;
    gap: 40px;
  }

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