.page-contact {
  --contact-accent: #A34A12;
  --contact-on-paper-muted: #6B5B45;
  background-color: var(--ink);
  color: var(--snow);
  font-family: var(--font-body);
  overflow-x: hidden;
}

.page-contact .contact-hero {
  position: relative;
  padding: 28px 0 40px;
  border-bottom: 2px solid var(--steel);
  background:
    radial-gradient(120% 90% at 88% 0%, rgba(46, 230, 200, .14), transparent 62%),
    linear-gradient(180deg, #071021 0%, var(--ink) 78%);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(46, 230, 200, .06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(46, 230, 200, .06) 1px, transparent 1px);
  background-size: 48px 48px;
  pointer-events: none;
}

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

.page-contact .eyebrow {
  margin: 18px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact h1 {
  margin: 12px 0 0;
  max-width: 20ch;
  font-size: clamp(30px, 7vw, 54px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--snow);
}

.page-contact .contact-hero__lede {
  margin: 16px 0 0;
  max-width: 54ch;
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

/* 通道命令栏 */
.page-contact .channel-bar {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .channel-bar__item {
  display: flex;
}

.page-contact .channel-bar__link {
  flex: 1;
  display: grid;
  grid-template-columns: auto 1fr auto;
  grid-template-areas:
    "num name dot"
    "num desc dot";
  align-items: center;
  gap: 2px 12px;
  padding: 14px 16px;
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  background: var(--navy);
  color: var(--snow);
  text-decoration: none;
  box-shadow: var(--shadow-hard);
  transition: transform .18s ease, border-color .18s ease, background-color .18s ease;
}

.page-contact .channel-bar__link:hover,
.page-contact .channel-bar__link:focus-visible {
  transform: translate(-3px, -3px);
  border-color: var(--cyan);
  background: #0F1B2E;
  outline: none;
}

.page-contact .channel-bar__num {
  grid-area: num;
  font-size: 20px;
  color: var(--gold);
}

.page-contact .channel-bar__name {
  grid-area: name;
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-contact .channel-bar__desc {
  grid-area: desc;
  font-size: 13px;
  color: var(--mist);
}

.page-contact .channel-bar__link .status-dot {
  grid-area: dot;
  align-self: start;
}

/* 主体两栏 */
.page-contact .contact-grid {
  display: grid;
  gap: 32px;
  padding-top: 32px;
  padding-bottom: 56px;
}

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

.page-contact .inline-link {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .inline-link:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* 客服通道卡片 */
.page-contact .channel-cards {
  display: grid;
  gap: 16px;
  margin-top: 20px;
}

.page-contact .channel-card {
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--navy);
  box-shadow: var(--shadow-hard);
  padding: 18px;
}

.page-contact .channel-card--mail {
  border-left: 6px solid var(--cyan);
}

.page-contact .channel-card--phone {
  border-left: 6px solid var(--flame);
}

.page-contact .channel-card__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--mist);
}

.page-contact .channel-card__value {
  margin: 10px 0 0;
  font-size: 17px;
  letter-spacing: -.01em;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .channel-card--phone .channel-card__value {
  color: var(--gold);
  font-size: 22px;
}

.page-contact .channel-card__text {
  margin: 10px 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* 问题清单 */
.page-contact .scope-list {
  margin-top: 18px;
  border-top: 2px solid var(--steel);
}

.page-contact .scope-item {
  border-bottom: 2px solid var(--steel);
}

.page-contact .scope-item__head {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 4px;
  cursor: pointer;
  list-style: none;
}

.page-contact .scope-item__head::-webkit-details-marker {
  display: none;
}

.page-contact .scope-item__head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .scope-item[open] .scope-item__head::after {
  content: "–";
}

.page-contact .scope-item__num {
  font-size: 14px;
  color: var(--gold);
}

.page-contact .scope-item__title {
  flex: 1;
  font-size: 16px;
  font-weight: 700;
  color: var(--snow);
}

.page-contact .scope-item__body {
  padding: 0 26px 18px 30px;
  color: var(--mist);
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .scope-item__body p {
  margin: 0;
}

/* 来信四件套 */
.page-contact .brief-list {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .brief-item {
  border: 2px solid var(--line-strong);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(20, 38, 58, .92), rgba(11, 18, 32, .92));
  padding: 16px;
}

.page-contact .brief-item__num {
  font-size: 13px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .brief-item__title {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--snow);
}

.page-contact .brief-item__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .brief-note {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* 处理节奏时间轴 */
.page-contact .pace-list {
  list-style: none;
  margin: 22px 0 0;
  padding: 0 0 0 24px;
  position: relative;
}

.page-contact .pace-list::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 14px;
  width: 2px;
  background: linear-gradient(180deg, var(--cyan) 0%, var(--steel) 100%);
}

.page-contact .pace-item {
  position: relative;
  padding: 0 0 24px 6px;
}

.page-contact .pace-item:last-child {
  padding-bottom: 0;
}

.page-contact .pace-item::before {
  content: "";
  position: absolute;
  left: -24px;
  top: 5px;
  width: 12px;
  height: 12px;
  border: 2px solid var(--cyan);
  border-radius: 50%;
  background: var(--ink);
}

.page-contact .pace-item__time {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--cyan);
}

.page-contact .pace-item__title {
  margin: 10px 0 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--snow);
}

.page-contact .pace-item__text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--mist);
}

/* 内容协作纸面区 */
.page-contact .collab-panel {
  margin-top: 20px;
  padding: 20px;
  border: 2px solid var(--paper-ink);
  border-radius: var(--radius);
  background:
    repeating-linear-gradient(0deg, rgba(42, 33, 24, .05) 0 1px, transparent 1px 4px),
    var(--paper);
  color: var(--paper-ink);
  box-shadow: var(--shadow-hard);
}

.page-contact .collab-panel__lead {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--paper-ink);
}

.page-contact .collab-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 16px 0 0;
  border-top: 2px solid rgba(42, 33, 24, .25);
  display: grid;
  gap: 12px;
}

.page-contact .collab-list__item {
  display: flex;
  gap: 12px;
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .collab-list__key {
  flex: 0 0 auto;
  align-self: flex-start;
  padding: 1px 7px;
  border: 1px solid var(--contact-accent);
  border-radius: var(--radius);
  font-size: 12px;
  color: var(--contact-accent);
}

.page-contact .collab-panel__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 2px solid rgba(42, 33, 24, .25);
  font-size: 14px;
  line-height: 1.8;
  color: var(--contact-on-paper-muted);
}

/* 地址 */
.page-contact .visit-block {
  margin-top: 20px;
  padding: 18px;
  border: 2px solid var(--steel);
  border-left: 6px solid var(--gold);
  border-radius: var(--radius);
  background: var(--navy);
  box-shadow: var(--shadow-hard);
}

.page-contact .visit-block__key {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--gold);
}

.page-contact .visit-block__value {
  margin: 10px 0 0;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.6;
  color: var(--snow);
}

.page-contact .visit-block__text {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--mist);
}

/* 右侧响应时段刻度 */
.page-contact .contact-rail {
  border: 2px solid var(--steel);
  border-radius: var(--radius);
  background: var(--navy);
  box-shadow: var(--shadow-hard);
  padding: 18px;
}

.page-contact .contact-rail__label {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--cyan);
}

.page-contact .contact-rail__ticks {
  list-style: none;
  margin: 0;
  padding: 0 0 0 20px;
  position: relative;
  display: grid;
  gap: 16px;
}

.page-contact .contact-rail__ticks::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 6px;
  bottom: 8px;
  width: 2px;
  background: var(--steel);
}

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

.page-contact .contact-rail__tick::before {
  content: "";
  position: absolute;
  left: -20px;
  top: 5px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--cyan);
}

.page-contact .contact-rail__time {
  display: block;
  font-size: 14px;
  color: var(--snow);
}

.page-contact .contact-rail__note {
  display: block;
  margin-top: 4px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--mist);
}

.page-contact .contact-rail__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 2px solid var(--steel);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* 图片与说明 */
.page-contact .media-figure {
  margin: 24px 0 0;
}

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

.page-contact .media-caption {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* 返回顶部 */
.page-contact .to-top {
  position: fixed;
  right: 16px;
  bottom: 20px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 2px solid var(--cyan);
  border-radius: var(--radius);
  background: var(--ink);
  color: var(--cyan);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  cursor: pointer;
}

.page-contact .to-top__glyph {
  font-size: 15px;
  line-height: 1;
}

.page-contact .to-top:focus-visible {
  outline: 2px solid var(--gold);
  outline-offset: 2px;
}

/* 响应式 */
@media (min-width: 640px) {
  .page-contact .channel-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .brief-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .collab-panel {
    padding: 26px;
  }
}

@media (min-width: 720px) {
  .page-contact .contact-hero {
    padding: 34px 0 52px;
  }

  .page-contact .channel-bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .contact-rail__ticks {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 20px;
  }

  .page-contact .contact-rail__ticks::before {
    bottom: 6px;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-grid {
    grid-template-columns: minmax(0, 1fr) 286px;
    gap: 48px;
    padding-top: 44px;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 88px;
  }

  .page-contact .contact-rail__ticks {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .page-contact .collab-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .collab-list__item {
    flex-direction: column;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-bar__link {
    transition: none;
  }

  .page-contact .channel-bar__link:hover {
    transform: none;
  }
}