.page-contact {
  --contact-rail-w: 340px;
  --contact-line: rgba(53, 240, 206, .16);
  --contact-soft: rgba(233, 243, 240, .62);
  position: relative;
  background-color: var(--night);
  color: var(--paper);
  overflow-x: clip;
  padding-bottom: clamp(2.5rem, 6vw, 5rem);
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--contact-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-line) 1px, transparent 1px);
  background-size: 78px 78px;
  -webkit-mask-image: radial-gradient(circle at 78% 6%, #000 0%, transparent 66%);
  mask-image: radial-gradient(circle at 78% 6%, #000 0%, transparent 66%);
  opacity: .85;
}

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

.page-contact .section {
  padding-top: clamp(2.4rem, 5.5vw, 4.4rem);
}

.page-contact .section:first-child {
  padding-top: clamp(1.2rem, 3vw, 2rem);
}

/* ---------- 面包屑 ---------- */

.page-contact .breadcrumb {
  margin-bottom: clamp(1rem, 2.4vw, 1.6rem);
}

.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .5rem;
  list-style: none;
  margin: 0;
  padding: 0;
  font-size: .8125rem;
  color: var(--mist);
}

.page-contact .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  margin-right: .5rem;
  color: var(--rail);
}

.page-contact .breadcrumb-link {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .breadcrumb-link:hover,
.page-contact .breadcrumb-link:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .breadcrumb-item span[aria-current="page"] {
  color: var(--cyan);
}

/* ---------- 首屏 ---------- */

.contact-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.4rem, 4vw, 2.6rem);
  align-items: end;
}

.contact-hero-copy .eyebrow {
  display: block;
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.contact-hero-copy .display-title {
  margin: 0 0 1rem;
  line-height: 1.16;
}

.contact-hero-copy .prose {
  margin: 0;
  max-width: 34em;
  color: var(--contact-soft);
  font-size: 1rem;
  line-height: 1.8;
}

.contact-quick {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: clamp(1.2rem, 3vw, 1.8rem);
}

.contact-hero-figure {
  margin: 0;
  border: 1px solid var(--rail);
  background: linear-gradient(155deg, var(--ink), var(--night));
}

.contact-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  opacity: .78;
  filter: saturate(.85) contrast(1.08);
}

/* ---------- 区块标题 ---------- */

.contact-head {
  max-width: 46em;
  margin-bottom: clamp(1.3rem, 3vw, 2.1rem);
}

.contact-head .eyebrow {
  display: block;
  margin: 0 0 .55rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--amber);
}

.contact-head .section-title {
  margin: 0 0 .6rem;
}

.contact-head .section-desc {
  margin: 0;
  color: var(--mist);
  font-size: .9375rem;
  line-height: 1.8;
  max-width: 40em;
}

/* ---------- 渠道与信息分栏 ---------- */

.contact-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3.2vw, 2.2rem);
}

.contact-rail {
  display: grid;
  gap: clamp(.9rem, 2.2vw, 1.15rem);
  align-content: start;
}

.contact-channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .55rem;
  padding: clamp(1.05rem, 2.6vw, 1.4rem) clamp(1.05rem, 2.6vw, 1.4rem) clamp(1.15rem, 2.6vw, 1.5rem);
  background: linear-gradient(158deg, var(--archive) 0%, var(--ink) 82%);
  overflow: hidden;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}

.contact-channel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: linear-gradient(180deg, var(--cyan) 0%, rgba(53, 240, 206, .06) 78%);
  transition: background .28s var(--ease);
}

.contact-channel::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-top: var(--cut) solid var(--night);
  border-left: var(--cut) solid transparent;
}

.contact-channel--phone::before {
  background: linear-gradient(180deg, var(--amber) 0%, rgba(255, 155, 69, .06) 78%);
}

.contact-channel--feedback::before {
  background: linear-gradient(180deg, var(--paper) 0%, rgba(233, 243, 240, .06) 78%);
}

.contact-channel:hover,
.contact-channel:focus-within {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card);
}

.contact-channel-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  color: var(--cyan);
  border: 1px solid var(--rail);
  background: rgba(10, 22, 34, .55);
}

.contact-channel--phone .contact-channel-icon {
  color: var(--amber);
}

.contact-channel--feedback .contact-channel-icon {
  color: var(--paper);
}

.contact-channel-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .16em;
  color: var(--mist);
}

.contact-channel-value {
  margin: 0;
  font-size: clamp(1.0625rem, 2.4vw, 1.25rem);
  font-weight: 700;
  line-height: 1.5;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.contact-channel--phone .contact-channel-value {
  font-size: clamp(1.5rem, 5vw, 1.95rem);
  letter-spacing: .02em;
  color: var(--amber);
}

.contact-channel--feedback .contact-channel-value {
  font-size: 1.0625rem;
  color: var(--paper);
}

.contact-channel-note,
.contact-channel-reveal {
  margin: 0;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--contact-soft);
}

.contact-channel-reveal {
  color: var(--mist);
  font-size: .8125rem;
}

.contact-channel-actions {
  margin-top: .35rem;
}

.contact-channel .copy-btn {
  min-height: 44px;
  padding: .55rem 1.05rem;
  font-size: .875rem;
}

.contact-channel .copy-status {
  margin: 0;
  min-height: 1.1em;
  font-family: var(--font-mono);
  font-size: .75rem;
  color: var(--cyan);
}

/* ---------- 右侧信息面板 ---------- */

.contact-side {
  min-width: 0;
}

.contact-side-panel {
  background: var(--sheet);
  color: var(--ink);
  padding: clamp(1.1rem, 3vw, 1.9rem);
  display: grid;
  gap: clamp(1.1rem, 3vw, 1.6rem);
  border-top: 4px solid var(--cyan);
}

.contact-side-title {
  margin: 0;
  font-size: clamp(1.125rem, 2.6vw, 1.375rem);
  font-weight: 700;
  letter-spacing: -.01em;
  color: var(--ink);
}

.contact-facts {
  margin: 0;
  display: grid;
  gap: 0;
}

.contact-fact {
  display: grid;
  grid-template-columns: 1fr;
  gap: .2rem;
  padding: .8rem 0;
  border-bottom: 1px solid rgba(15, 42, 36, .14);
}

.contact-fact:first-child {
  border-top: 1px solid rgba(15, 42, 36, .14);
}

.contact-fact dt {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .16em;
  color: rgba(15, 42, 36, .58);
}

.contact-fact dd {
  margin: 0;
  font-size: .9375rem;
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.contact-fact-mail {
  color: #0b5a4c;
  font-weight: 600;
}

.contact-fact--icp dd {
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: .02em;
  color: #0b5a4c;
}

.contact-region {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding-top: .4rem;
  border-top: 1px dashed rgba(15, 42, 36, .22);
}

.contact-region-figure {
  margin: 0;
  border: 1px solid rgba(15, 42, 36, .18);
}

.contact-region-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  filter: saturate(.9);
}

.contact-region-title {
  margin: 0 0 .45rem;
  font-size: .9375rem;
  font-weight: 700;
  color: var(--ink);
}

.contact-region-copy .annotation {
  margin: 0;
  color: rgba(15, 42, 36, .68);
  font-size: .8125rem;
  line-height: 1.75;
}

/* ---------- 纠错流程 ---------- */

.contact-steps {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(.9rem, 2.4vw, 1.3rem);
  counter-reset: step;
}

.contact-step {
  position: relative;
  padding: clamp(1.05rem, 2.6vw, 1.35rem);
  background: linear-gradient(150deg, rgba(27, 58, 52, .9), rgba(10, 22, 34, .9));
  border: 1px solid var(--rail);
  border-left: 3px solid var(--rail);
  transition: border-left-color .25s var(--ease), transform .25s var(--ease);
}

.contact-step:hover,
.contact-step:focus-within {
  border-left-color: var(--cyan);
  transform: translateY(-3px);
}

.contact-step-index {
  display: block;
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--cyan);
  opacity: .85;
}

.contact-step-title {
  margin: .45rem 0 .5rem;
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--paper);
}

.contact-step p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.78;
  color: var(--contact-soft);
}

.contact-feedback-note {
  margin-top: clamp(1.3rem, 3vw, 1.9rem);
  padding: clamp(1rem, 2.6vw, 1.4rem) clamp(1rem, 2.6vw, 1.5rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1rem;
  justify-content: space-between;
  background: rgba(53, 240, 206, .06);
  border-left: 3px solid var(--cyan);
}

.contact-feedback-text {
  margin: 0;
  flex: 1 1 22rem;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .link-more {
  flex: 0 0 auto;
  font-family: var(--font-mono);
  font-size: .8125rem;
  letter-spacing: .04em;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 206, .38);
  padding-bottom: .12rem;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-contact .link-more:hover,
.page-contact .link-more:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

/* ---------- 合作 ---------- */

.contact-partner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.2rem, 3.4vw, 2.4rem);
}

.contact-partner-copy .eyebrow {
  display: block;
  margin: 0 0 .55rem;
  font-family: var(--font-mono);
  font-size: .75rem;
  letter-spacing: .18em;
  color: var(--amber);
}

.contact-partner-copy .section-title {
  margin: 0 0 .8rem;
}

.contact-partner-copy .prose {
  margin: 0;
  max-width: 32em;
  color: var(--contact-soft);
  font-size: .9375rem;
  line-height: 1.82;
}

.contact-ask-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .85rem;
}

.contact-ask {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: .85rem;
  align-items: start;
  padding: .95rem 1rem;
  background: rgba(27, 58, 52, .55);
  border-bottom: 1px solid var(--rail);
}

.contact-ask .tag {
  font-family: var(--font-mono);
  font-size: .6875rem;
  letter-spacing: .1em;
  color: var(--cyan);
  border: 1px solid rgba(53, 240, 206, .34);
  padding: .2rem .5rem;
  white-space: nowrap;
  align-self: start;
}

.contact-ask p {
  margin: 0;
  font-size: .875rem;
  line-height: 1.78;
  color: var(--contact-soft);
}

.contact-partner-foot {
  margin: clamp(1.2rem, 3vw, 1.8rem) 0 0;
  padding-top: clamp(1rem, 2.4vw, 1.3rem);
  border-top: 1px solid var(--rail);
  font-size: .875rem;
  line-height: 1.8;
  color: var(--mist);
  max-width: 52em;
}

/* ---------- 场景速查 ---------- */

.contact-scene-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--rail);
}

.contact-scene {
  display: grid;
  grid-template-columns: 1fr;
  gap: .4rem;
  padding: clamp(1rem, 2.6vw, 1.35rem) 0;
  border-bottom: 1px solid var(--rail);
}

.contact-scene-q {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
  color: var(--paper);
  line-height: 1.6;
}

.contact-scene-a {
  margin: 0;
  font-size: .875rem;
  line-height: 1.82;
  color: var(--contact-soft);
}

.contact-scene-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 206, .34);
  transition: color .2s var(--ease), border-color .2s var(--ease);
}

.contact-scene-link:hover,
.contact-scene-link:focus-visible {
  color: var(--amber);
  border-bottom-color: var(--amber);
}

.contact-final {
  margin-top: clamp(1.5rem, 3.6vw, 2.2rem);
  padding: clamp(1.1rem, 2.8vw, 1.6rem);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  background: linear-gradient(120deg, rgba(15, 42, 36, .95), rgba(10, 22, 34, .95));
  border: 1px solid var(--rail);
}

.contact-final-text {
  margin: 0;
  flex: 1 1 20rem;
  font-size: .9375rem;
  line-height: 1.8;
  color: var(--contact-soft);
}

.page-contact .contact-final-btn {
  flex: 0 0 auto;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: .65rem 1.3rem;
}

/* ---------- 键盘焦点 ---------- */

.page-contact a:focus-visible,
.page-contact button:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
}

/* ---------- 断点：平板及以上 ---------- */

@media (min-width: 720px) {
  .contact-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .contact-scene {
    grid-template-columns: minmax(0, 18rem) minmax(0, 1fr);
    gap: 1.4rem;
    align-items: baseline;
  }

  .contact-region {
    grid-template-columns: minmax(0, 15rem) minmax(0, 1fr);
    align-items: center;
  }

  .contact-partner-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
    align-items: start;
  }

  .contact-fact {
    grid-template-columns: 8.5rem minmax(0, 1fr);
    gap: 1rem;
    align-items: baseline;
  }
}

/* ---------- 断点：桌面 ---------- */

@media (min-width: 1024px) {
  .contact-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.04fr);
    gap: clamp(2rem, 4.4vw, 3.4rem);
  }

  .contact-split {
    grid-template-columns: minmax(0, var(--contact-rail-w)) minmax(0, 1fr);
    gap: clamp(1.6rem, 3.6vw, 2.6rem);
  }

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

  .contact-step {
    display: flex;
    flex-direction: column;
  }
}

/* ---------- 悬停展开：仅指针设备 ---------- */

@media (hover: hover) and (min-width: 900px) {
  .contact-channel-reveal {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .28s var(--ease), opacity .28s var(--ease), margin-top .28s var(--ease);
  }

  .contact-channel:hover .contact-channel-reveal,
  .contact-channel:focus-within .contact-channel-reveal {
    max-height: 6.5rem;
    opacity: 1;
  }
}

/* ---------- 减少动态 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }

  .contact-channel:hover,
  .contact-channel:focus-within,
  .contact-step:hover,
  .contact-step:focus-within {
    transform: none;
  }
}