.page-contact {
  --c-green: #39FF88;
  --c-orange: #FF7A1A;
  --c-bg: #0A1628;
  --c-panel: #10233D;
  --c-card: #162A45;
  --c-line: #22344F;
  --c-text: #F5F7FA;
  --c-muted: #B8C3D4;
  --c-sub: #60789A;
  --f-data: "JetBrains Mono", "Roboto Mono", "SFMono-Regular", Consolas, monospace;
  --f-head: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  position: relative;
  background: var(--c-bg);
  color: var(--c-text);
  overflow-x: hidden;
  padding: 0 0 4rem;
}

.page-contact .breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1.5rem 1.25rem 0;
  font-size: .875rem;
}

.page-contact .breadcrumb a {
  color: var(--c-sub);
  text-decoration: none;
  transition: color .2s ease;
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  color: var(--c-green);
}

.page-contact .breadcrumb__sep {
  margin: 0 .5rem;
  color: var(--c-line);
}

.page-contact .section-head {
  margin-bottom: 2rem;
}

.page-contact .section-title {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(1.4rem, 2.6vw, 2rem);
  letter-spacing: -.01em;
  line-height: 1.2;
  margin: .5rem 0;
}

.page-contact .section-sub {
  font-size: .9rem;
  color: var(--c-muted);
  line-height: 1.7;
  max-width: 40em;
  margin: 0;
}

/* ── 首屏 ── */
.page-contact .contact-hero {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1.25rem 3.5rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  position: relative;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 68%;
  height: 100%;
  background: linear-gradient(220deg, rgba(22, 42, 69, .35) 0%, transparent 70%);
  clip-path: polygon(30% 0, 100% 0, 100% 100%, 0 100%);
  z-index: 0;
  pointer-events: none;
}

.page-contact .contact-hero__poster {
  position: relative;
  z-index: 1;
  clip-path: polygon(0 0, 100% 0, 92% 100%, 0 94%);
  background: var(--c-panel);
}

.page-contact .contact-hero__poster img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  aspect-ratio: 4 / 3;
}

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

.page-contact .contact-hero__content h1 {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(1.8rem, 4.2vw, 3rem);
  line-height: 1.12;
  letter-spacing: -.02em;
  margin: .5rem 0 1rem;
}

.page-contact .contact-hero__kicker {
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-green);
  margin: 0 0 1rem;
  letter-spacing: .02em;
}

.page-contact .contact-hero__desc {
  font-size: .925rem;
  line-height: 1.85;
  color: var(--c-muted);
  max-width: 34em;
  margin: 0;
}

/* ── 沟通通道 ── */
.page-contact .contact-channels {
  position: relative;
  padding: 3.5rem 1.25rem 4rem;
  background: linear-gradient(145deg, var(--c-panel) 0%, var(--c-bg) 100%);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-contact .contact-channels::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--c-green) 0 40%, var(--c-orange) 100%);
}

.page-contact .contact-channels .section-head {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding: 0;
}

.page-contact .contact-channels__grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-contact .channel-entry {
  display: flex;
  flex-direction: column;
  gap: .5rem;
  padding: 1.5rem 1.25rem 1.5rem 1.5rem;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-green);
  text-decoration: none;
  color: inherit;
  transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease;
}

.page-contact .channel-entry--phone {
  border-left-color: var(--c-orange);
}

.page-contact .channel-entry--address {
  border-left-color: var(--c-sub);
}

.page-contact .channel-entry:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, .35);
  border-color: rgba(57, 255, 136, .35);
}

.page-contact .channel-entry--phone:hover {
  border-color: rgba(255, 122, 26, .35);
}

.page-contact .channel-entry__index {
  font-family: var(--f-data);
  font-size: .75rem;
  color: var(--c-sub);
  letter-spacing: .1em;
}

.page-contact .channel-entry__label {
  font-size: .8rem;
  font-weight: 700;
  color: var(--c-muted);
  letter-spacing: .08em;
}

.page-contact .channel-entry__value {
  font-family: var(--f-data);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--c-text);
  word-break: break-all;
  line-height: 1.5;
}

.page-contact .channel-entry--phone .channel-entry__value {
  color: var(--c-green);
  font-size: 1.25rem;
}

.page-contact .channel-entry__usage {
  font-size: .85rem;
  line-height: 1.7;
  color: var(--c-muted);
}

.page-contact .contact-channels__note {
  max-width: 1200px;
  margin: 2rem auto 0;
  font-size: .9rem;
  color: var(--c-muted);
  line-height: 1.8;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--c-line);
}

/* ── 合作与建议 ── */
.page-contact .contact-cooperation {
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 1.25rem;
}

.page-contact .contact-cooperation__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
}

.page-contact .cooperation-zone {
  position: relative;
  padding: 1.75rem 1.5rem 1.75rem 2rem;
  background: var(--c-panel);
  border: 1px solid var(--c-line);
  transition: transform .2s ease;
}

.page-contact .cooperation-zone:hover {
  transform: translateY(-3px);
}

.page-contact .cooperation-zone__num {
  position: absolute;
  top: 1.25rem;
  right: 1.25rem;
  font-family: var(--f-data);
  font-size: 2rem;
  font-weight: 700;
  color: rgba(96, 120, 154, .25);
  line-height: 1;
  z-index: 0;
}

.page-contact .cooperation-zone h3 {
  font-family: var(--f-head);
  font-weight: 900;
  font-size: 1.1rem;
  margin: 0 0 .75rem;
  color: var(--c-text);
  position: relative;
  z-index: 1;
}

.page-contact .cooperation-zone h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--c-green);
  margin-right: .6rem;
  transform: rotate(45deg);
}

.page-contact .cooperation-zone p {
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-muted);
  margin: 0;
  position: relative;
  z-index: 1;
}

/* ── 响应时间 ── */
.page-contact .contact-response {
  max-width: 840px;
  margin: 0 auto;
  padding: 4rem 1.25rem;
}

.page-contact .contact-response__board {
  border: 1px solid var(--c-line);
  background: var(--c-panel);
  padding: .5rem 1.5rem;
}

.page-contact .response-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: .5rem;
  padding: 1rem 0;
  border-bottom: 1px dashed var(--c-line);
}

.page-contact .response-row:last-child {
  border-bottom: none;
}

.page-contact .response-row__label {
  font-size: .85rem;
  color: var(--c-sub);
  letter-spacing: .04em;
}

.page-contact .response-row__value {
  font-family: var(--f-data);
  font-size: .95rem;
  font-weight: 700;
  color: var(--c-text);
  text-align: right;
}

.page-contact .contact-response__note {
  margin: 1.5rem 0 0;
  font-size: .875rem;
  color: var(--c-muted);
  line-height: 1.8;
  padding-left: 1rem;
  border-left: 3px solid var(--c-green);
}

/* ── 书面联系 ── */
.page-contact .contact-letter {
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  padding: 4rem 1.25rem 2rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  align-items: center;
}

.page-contact .contact-letter__texture {
  order: 1;
  overflow: hidden;
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

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

.page-contact .contact-letter__content {
  order: 2;
}

.page-contact .contact-letter__desc {
  font-size: .9rem;
  color: var(--c-muted);
  line-height: 1.8;
  margin: 0 0 1.5rem;
  max-width: 42em;
}

.page-contact .letter-address {
  display: flex;
  flex-direction: column;
  gap: .35rem;
  padding: 1.25rem 1.5rem;
  margin-bottom: .75rem;
  background: var(--c-card);
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-orange);
}

.page-contact .letter-address__label {
  font-size: .75rem;
  letter-spacing: .1em;
  color: var(--c-sub);
  font-weight: 700;
}

.page-contact .letter-address__value {
  font-family: var(--f-data);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-text);
  word-break: break-all;
  line-height: 1.6;
}

.page-contact .contact-letter__note {
  margin: 1.25rem 0 0;
  font-size: .8rem;
  color: var(--c-sub);
  line-height: 1.7;
}

/* ── 相关链接 ── */
.page-contact .contact-links {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2.5rem 1.25rem 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-contact .contact-links .btn {
  font-family: var(--f-head);
  font-weight: 700;
  font-size: .875rem;
  padding: .75rem 1.5rem;
  border-radius: 0;
  text-decoration: none;
  transition: transform .2s ease, background .2s ease, color .2s ease;
}

.page-contact .contact-links .btn:hover {
  transform: translateY(-2px);
}

/* ── 桌面端 ── */
@media (min-width: 768px) {
  .page-contact .contact-hero {
    grid-template-columns: 1.02fr 1fr;
    gap: 3rem;
    align-items: center;
    min-height: 540px;
    padding: 3rem 1.25rem 5rem;
  }

  .page-contact .contact-hero__poster {
    clip-path: polygon(0 0, 100% 0, 88% 100%, 0 92%);
  }

  .page-contact .contact-hero__content {
    padding-right: 1.5rem;
  }

  .page-contact .contact-hero__content h1 {
    font-size: 2.8rem;
  }

  .page-contact .contact-channels__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-contact .channel-entry {
    padding: 1.75rem 1.5rem;
    min-height: 220px;
  }

  .page-contact .channel-entry__value {
    font-size: 1.05rem;
  }

  .page-contact .channel-entry--phone .channel-entry__value {
    font-size: 1.45rem;
  }

  .page-contact .contact-cooperation__list {
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
  }

  .page-contact .cooperation-zone {
    min-height: 230px;
    padding: 2rem 1.5rem 2rem 2.25rem;
  }

  .page-contact .contact-letter {
    grid-template-columns: .9fr 1.1fr;
    gap: 3rem;
    padding: 5rem 1.25rem 3rem;
  }

  .page-contact .contact-letter__texture {
    order: 2;
    margin-left: -1rem;
  }

  .page-contact .contact-letter__content {
    order: 1;
  }

  .page-contact .letter-address {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }

  .page-contact .letter-address__value {
    font-size: 1.05rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-entry,
  .page-contact .cooperation-zone,
  .page-contact .contact-links .btn {
    transition: none;
    transform: none;
  }

  .page-contact .channel-entry:hover,
  .page-contact .cooperation-zone:hover {
    transform: none;
  }
}