.page-contact {
  --pc-mono: "DIN Alternate", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  position: relative;
}

.page-contact::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 520px;
  background:
    radial-gradient(120% 80% at 12% 0%, rgba(123, 44, 255, .30), transparent 62%),
    radial-gradient(90% 70% at 90% 6%, rgba(255, 107, 26, .18), transparent 60%);
  pointer-events: none;
  z-index: 0;
}

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

.page-contact .contact-hero {
  padding-top: clamp(20px, 4vw, 36px);
  padding-bottom: clamp(32px, 6vw, 64px);
}

.page-contact .hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-contact .contact-title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(42px, 12vw, 96px);
  line-height: .94;
  letter-spacing: -.02em;
  color: var(--c-ice);
  background: linear-gradient(102deg, var(--c-ice) 0%, var(--c-purple-soft) 48%, var(--c-orange) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-contact .hero-lead {
  margin: 20px 0 0;
  max-width: 42ch;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.85;
  color: var(--text-soft);
}

.page-contact .hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-contact .hero-plate {
  position: relative;
  margin: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--glass-edge);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.page-contact .hero-plate::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 52%, rgba(5, 6, 13, .78) 100%);
  pointer-events: none;
}

.page-contact .hero-plate-note {
  position: absolute;
  left: 14px;
  bottom: 14px;
  z-index: 2;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-edge);
  background: rgba(11, 16, 38, .62);
  backdrop-filter: blur(8px);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--c-mint);
}

.page-contact .hero-plate img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .section-head {
  max-width: 680px;
}

.page-contact .section-head h2 {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(26px, 5.4vw, 44px);
  line-height: 1.16;
  letter-spacing: -.01em;
  color: var(--c-ice);
}

.page-contact .section-sub {
  margin: 14px 0 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--text-soft);
}

/* 联系通道 */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 28px;
}

.page-contact .channel-card {
  position: relative;
  padding: 24px 20px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(20, 27, 61, .96), rgba(11, 16, 38, .96));
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 3px;
  background: linear-gradient(90deg, var(--c-purple), var(--c-orange));
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  transform: translateY(-3px);
  border-color: var(--line-strong);
}

.page-contact .channel-label {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--c-amber);
}

.page-contact .channel-value {
  display: block;
  margin: 12px 0 0;
  font-family: var(--pc-mono);
  font-size: clamp(17px, 4.2vw, 22px);
  font-weight: 700;
  letter-spacing: .01em;
  line-height: 1.35;
  color: var(--c-ice);
  overflow-wrap: anywhere;
}

.page-contact .channel-value--text {
  font-family: var(--font-sans);
  font-size: clamp(15px, 3.6vw, 17px);
  font-weight: 700;
  letter-spacing: 0;
  line-height: 1.7;
}

.page-contact .channel-desc {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-mute);
}

.page-contact .status-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 18px;
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(95, 242, 194, .26);
  background: linear-gradient(100deg, rgba(95, 242, 194, .10), rgba(20, 27, 61, .72) 62%);
}

.page-contact .status-lamp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--c-mint);
}

.page-contact .lamp-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--c-mint);
  box-shadow: 0 0 0 4px rgba(95, 242, 194, .16), 0 0 16px rgba(95, 242, 194, .75);
}

.page-contact .time-scale {
  position: relative;
  height: 8px;
  border-radius: var(--radius-pill);
  background: rgba(139, 144, 168, .22);
  overflow: hidden;
}

.page-contact .time-scale span {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 37.5%;
  width: 37.5%;
  border-radius: var(--radius-pill);
  background: linear-gradient(90deg, var(--c-mint), var(--c-amber), var(--c-orange));
}

.page-contact .scale-legend {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-family: var(--pc-mono);
  font-size: 12px;
  color: var(--text-mute);
}

.page-contact .status-note {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-soft);
}

/* 邮件写作 */
.page-contact .mail-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
}

.page-contact .mail-list {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .mail-step {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(244, 241, 255, .05);
  transition: border-color .3s var(--ease), background .3s var(--ease);
}

.page-contact .mail-step:hover {
  border-color: var(--line-strong);
  background: rgba(123, 44, 255, .12);
}

.page-contact .mail-step-num {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  font-family: var(--pc-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--c-carbon);
  background: linear-gradient(140deg, var(--c-amber), var(--c-orange));
}

.page-contact .mail-step-body {
  display: block;
}

.page-contact .mail-step-title {
  display: block;
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ice);
}

.page-contact .mail-step-desc {
  display: block;
  margin-top: 6px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-mute);
}

.page-contact .mail-figure {
  margin: 0;
  padding: 14px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: rgba(20, 27, 61, .72);
  box-shadow: var(--shadow-sm);
}

.page-contact .mail-figure .media {
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .mail-figure img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.page-contact .mail-figure-note {
  margin: 14px 4px 2px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text-mute);
}

/* 回复节奏 */
.page-contact .timeline {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 30px;
}

.page-contact .tl-node {
  position: relative;
  padding: 20px 20px 22px 24px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(20, 27, 61, .7);
}

.page-contact .tl-node::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  bottom: 16px;
  width: 3px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--c-purple-soft), var(--c-orange));
}

.page-contact .tl-when {
  margin: 0;
  font-family: var(--pc-mono);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .10em;
  color: var(--c-mint);
}

.page-contact .tl-title {
  margin: 8px 0 0;
  font-size: 20px;
  font-weight: 900;
  color: var(--c-ice);
}

.page-contact .tl-desc {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-mute);
}

/* 地址与备案 */
.page-contact .info-block {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: 26px;
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px dashed var(--line-strong);
  background: rgba(11, 16, 38, .78);
}

.page-contact .info-cell {
  padding: 4px 2px;
}

.page-contact .info-key {
  margin: 0;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .16em;
  color: var(--c-amber);
}

.page-contact .info-val {
  margin: 12px 0 0;
  font-size: clamp(17px, 4.4vw, 21px);
  font-weight: 900;
  line-height: 1.5;
  color: var(--c-ice);
  overflow-wrap: anywhere;
}

.page-contact .info-val--mono {
  font-family: var(--pc-mono);
  letter-spacing: .02em;
}

.page-contact .info-desc {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-mute);
}

.page-contact .place-more {
  margin: 22px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--text-soft);
}

.page-contact .inline-link {
  color: var(--c-mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(95, 242, 194, .45);
  padding-bottom: 1px;
  transition: border-color .25s var(--ease), color .25s var(--ease);
}

.page-contact .inline-link:hover,
.page-contact .inline-link:focus-visible {
  color: var(--c-ice);
  border-bottom-color: var(--c-orange);
}

/* 常见场景 */
.page-contact .scene-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 28px;
}

.page-contact .scene-card {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) 18px;
  gap: 14px;
  align-items: center;
  padding: 18px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: rgba(20, 27, 61, .74);
  text-decoration: none;
  color: inherit;
  transition: transform .28s var(--ease), border-color .28s var(--ease), background .28s var(--ease);
}

.page-contact .scene-card:hover,
.page-contact .scene-card:focus-visible {
  transform: translateY(-2px);
  border-color: var(--c-orange);
  background: rgba(255, 107, 26, .12);
}

.page-contact .scene-num {
  font-family: var(--pc-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--c-amber);
}

.page-contact .scene-body {
  display: block;
  min-width: 0;
}

.page-contact .scene-title {
  display: block;
  font-size: 17px;
  font-weight: 900;
  color: var(--c-ice);
}

.page-contact .scene-desc {
  display: block;
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-mute);
}

.page-contact .scene-arrow {
  font-size: 16px;
  color: var(--c-purple-soft);
  transition: transform .28s var(--ease), color .28s var(--ease);
}

.page-contact .scene-card:hover .scene-arrow,
.page-contact .scene-card:focus-visible .scene-arrow {
  transform: translateX(3px);
  color: var(--c-orange);
}

/* 收尾 */
.page-contact .closing-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 30px;
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(105deg, rgba(123, 44, 255, .22), rgba(255, 107, 26, .14));
}

.page-contact .closing-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-ice);
}

.page-contact .closing-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.page-contact .strip-link {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--glass-edge);
  background: rgba(11, 16, 38, .55);
  font-size: 14px;
  font-weight: 700;
  color: var(--c-ice);
  text-decoration: none;
  transition: border-color .25s var(--ease), background .25s var(--ease), color .25s var(--ease);
}

.page-contact .strip-link:hover,
.page-contact .strip-link:focus-visible {
  border-color: var(--c-mint);
  background: rgba(95, 242, 194, .14);
  color: var(--c-mint);
}

@media (min-width: 640px) {
  .page-contact .scene-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .status-strip {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: center;
    column-gap: 24px;
  }

  .page-contact .status-note {
    grid-column: 1 / -1;
  }

  .page-contact .info-block {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
    gap: 32px;
    padding: 28px;
  }

  .page-contact .closing-strip {
    grid-template-columns: minmax(0, 1fr) auto;
    align-items: center;
    gap: 24px;
  }
}

@media (min-width: 820px) {
  .page-contact .timeline {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
    position: relative;
  }

  .page-contact .timeline::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    height: 1px;
    background: linear-gradient(90deg, var(--c-purple-soft), var(--c-orange), transparent);
  }

  .page-contact .tl-node {
    padding-top: 26px;
  }
}

@media (min-width: 900px) {
  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 48px;
    align-items: center;
  }

  .page-contact .mail-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, .85fr);
    gap: 46px;
    align-items: start;
  }

  .page-contact .mail-figure {
    position: sticky;
    top: 96px;
  }
}

@media (min-width: 1040px) {
  .page-contact .scene-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .mail-step,
  .page-contact .scene-card,
  .page-contact .scene-arrow,
  .page-contact .strip-link,
  .page-contact .inline-link {
    transition: none;
  }
}