.page-contact {
  --pc-hair: rgba(30, 51, 85, 0.92);
  --pc-glass: rgba(18, 32, 60, 0.55);
  --pc-glass-strong: linear-gradient(125deg, rgba(18, 32, 60, 0.86), rgba(7, 16, 38, 0.94));
  color: var(--warm);
}

.page-contact .section {
  padding: clamp(42px, 7vw, 84px) 0;
}

.page-contact .section-head {
  max-width: 720px;
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .section-title {
  margin: 12px 0 10px;
  font-size: clamp(26px, 4.2vw, 42px);
  line-height: 1.14;
  letter-spacing: -0.02em;
  font-weight: 800;
}

.page-contact .section-lead {
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
  margin: 0;
}

/* ---------- 首屏框景 ---------- */
.page-contact .contact-hero {
  padding: clamp(14px, 2.4vw, 24px) 0 clamp(6px, 2vw, 18px);
}

.page-contact .hero-frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--pc-hair);
  background:
    linear-gradient(180deg, rgba(53, 240, 216, 0.08), rgba(4, 7, 15, 0) 62%),
    var(--void-800);
  padding: clamp(22px, 4vw, 44px) clamp(18px, 4vw, 44px) clamp(24px, 4vw, 42px);
}

.page-contact .hero-frame::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    repeating-linear-gradient(90deg, var(--grid) 0 1px, transparent 1px 64px),
    repeating-linear-gradient(0deg, var(--grid) 0 1px, transparent 1px 64px);
  opacity: 0.22;
}

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

.page-contact .hero-top {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--grid);
}

.page-contact .hero-clock {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--mist);
}

.page-contact h1 {
  margin: clamp(20px, 3.4vw, 34px) 0 0;
  font-size: clamp(32px, 6vw, 70px);
  line-height: 1.04;
  letter-spacing: -0.025em;
  font-weight: 800;
  max-width: 18ch;
}

.page-contact .hero-lead {
  margin: clamp(16px, 2.6vw, 24px) 0 0;
  max-width: 60ch;
  font-size: clamp(16px, 1.6vw, 19px);
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-contact .chip {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 12px;
  border: 1px solid var(--pc-hair);
  background: var(--pc-glass);
  border-radius: var(--r-sm);
  max-width: 100%;
}

.page-contact .chip-key {
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  white-space: nowrap;
}

.page-contact .chip-value {
  font-size: 13px;
  color: var(--warm);
  overflow-wrap: anywhere;
}

.page-contact .copy-btn {
  border: 1px solid var(--line-soft);
  background: transparent;
  color: var(--mist);
  font: inherit;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  cursor: pointer;
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

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

/* ---------- 渠道带 ---------- */
.page-contact .channel-layout {
  display: grid;
  gap: 18px;
}

.page-contact .channel-grid {
  display: grid;
  gap: 1px;
  background: var(--pc-hair);
  border: 1px solid var(--pc-hair);
}

.page-contact .channel {
  position: relative;
  padding: clamp(20px, 2.6vw, 26px) clamp(18px, 2.4vw, 24px);
  transition: background 0.3s var(--ease);
}

.page-contact .channel:nth-child(odd) {
  background: var(--void-700);
}

.page-contact .channel:nth-child(even) {
  background: var(--pc-glass);
}

.page-contact .channel::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  height: 2px;
  width: 0;
  background: var(--cyan);
  transition: width 0.36s var(--ease);
}

.page-contact .channel:hover,
.page-contact .channel:focus-within {
  background: var(--void-800);
}

.page-contact .channel:hover::after,
.page-contact .channel:focus-within::after {
  width: 100%;
}

.page-contact .ch-idx {
  display: block;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--cyan);
  margin-bottom: 14px;
}

.page-contact .ch-title {
  margin: 0 0 10px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .ch-need {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .ch-action {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  margin: 0 0 14px;
  font-size: 12.5px;
  color: var(--warm);
  overflow-wrap: anywhere;
}

.page-contact .ch-key {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--orange);
}

.page-contact .ch-tip {
  margin: 0;
  padding-left: 10px;
  border-left: 2px solid var(--cyan-deep);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .channel-figure {
  margin: 0;
  border: 1px solid var(--pc-hair);
  background: var(--void-800);
  padding: 10px;
}

.page-contact .channel-figure img,
.page-contact .resp-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  filter: saturate(0.92) contrast(1.04);
}

.page-contact .media-caption {
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--mist);
}

/* ---------- 响应时段 ---------- */
.page-contact .resp-layout {
  display: grid;
  gap: 18px;
}

.page-contact .panel {
  background: var(--void-700);
  border: 1px solid var(--pc-hair);
  padding: clamp(20px, 3vw, 30px);
}

.page-contact .resp-scale {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.page-contact .scale-top {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}

.page-contact .scale-label {
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .scale-hours {
  font-size: clamp(22px, 3vw, 30px);
  font-weight: 700;
  letter-spacing: 0.04em;
}

.page-contact .scale-track {
  position: relative;
  height: 12px;
  border: 1px solid var(--grid);
  background: var(--void-900);
  overflow: hidden;
}

.page-contact .scale-track::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--cyan-deep), var(--cyan) 52%, var(--orange));
  opacity: 0.9;
}

.page-contact .scale-track::after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, rgba(4, 7, 15, 0.62) 0 1px, transparent 1px 14px);
}

.page-contact .scale-ticks {
  display: flex;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--mist);
  letter-spacing: 0.08em;
}

.page-contact .scale-list {
  list-style: none;
  margin: 6px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .scale-list li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .scale-list .tag {
  flex: none;
  margin-top: 2px;
}

.page-contact .resp-figure {
  margin: 0;
  border: 1px solid var(--pc-hair);
  background: var(--void-800);
  padding: 10px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

/* ---------- 写信示范 ---------- */
.page-contact .writing-grid {
  display: grid;
  gap: 18px;
}

.page-contact .writing-sub {
  margin: 0 0 16px;
  font-size: 19px;
  font-weight: 700;
}

.page-contact .writing-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .writing-list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  padding-top: 14px;
  border-top: 1px solid var(--grid);
}

.page-contact .writing-list li:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .w-key {
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-contact .w-body {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .w-body strong {
  display: block;
  color: var(--warm);
  font-weight: 600;
  margin-bottom: 2px;
}

.page-contact .mail-demo {
  background: var(--void-800);
  border: 1px solid var(--pc-hair);
  padding: clamp(18px, 2.6vw, 24px);
}

.page-contact .mail-demo summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  font-size: 15px;
  font-weight: 600;
  color: var(--warm);
}

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

.page-contact .mail-demo summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 20px;
  color: var(--cyan);
  line-height: 1;
}

.page-contact .mail-demo[open] summary::after {
  content: "−";
}

.page-contact .mail-demo summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 4px;
}

.page-contact .specimen {
  margin: 16px 0 0;
  padding: 14px 16px;
  background: var(--void-900);
  border-left: 2px solid var(--cyan);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 2;
  color: var(--warm);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
}

.page-contact .mail-note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 纠错与合作 ---------- */
.page-contact .bridge-grid {
  display: grid;
  gap: 18px;
}

.page-contact .bridge-card .tag {
  display: inline-block;
  margin-bottom: 14px;
}

.page-contact .bridge-card--glass {
  background: var(--pc-glass-strong);
  border-color: var(--grid);
}

.page-contact .bridge-title {
  margin: 0 0 12px;
  font-size: clamp(19px, 2.4vw, 24px);
  font-weight: 700;
  letter-spacing: -0.01em;
}

.page-contact .bridge-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ---------- 地址窄带 ---------- */
.page-contact .addr-band {
  border: 1px solid var(--pc-hair);
  background:
    linear-gradient(118deg, rgba(18, 32, 60, 0.9), rgba(7, 16, 38, 0.96)),
    var(--void-800);
  padding: 0;
}

.page-contact .addr-band .rule-tick {
  opacity: 0.7;
}

.page-contact .addr-inner {
  display: grid;
  gap: 22px;
  padding: clamp(22px, 3.6vw, 36px);
}

.page-contact .addr-title {
  margin: 12px 0 10px;
  font-size: clamp(22px, 3.2vw, 32px);
}

.page-contact .addr-text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--mist);
  max-width: 56ch;
}

.page-contact .addr-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 18px;
}

.page-contact .addr-meta {
  margin: 0;
  display: grid;
  gap: 12px;
  align-self: start;
  border-left: 2px solid var(--cyan-deep);
  padding-left: 16px;
}

.page-contact .addr-meta div {
  display: grid;
  gap: 3px;
}

.page-contact .addr-meta dt {
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--cyan);
}

.page-contact .addr-meta dd {
  margin: 0;
  font-size: 13.5px;
  color: var(--warm);
  overflow-wrap: anywhere;
}

/* ---------- 自助入口 ---------- */
.page-contact .help-grid {
  display: grid;
  gap: 12px;
}

.page-contact .help-card {
  display: grid;
  gap: 8px;
  padding: 20px 18px;
  border: 1px solid var(--pc-hair);
  background: var(--void-800);
  text-decoration: none;
  color: var(--warm);
  transition: border-color 0.24s var(--ease), background 0.24s var(--ease), transform 0.24s var(--ease);
}

.page-contact .help-card:hover,
.page-contact .help-card:focus-visible {
  border-color: var(--cyan);
  background: var(--void-700);
  transform: translateY(-2px);
}

.page-contact .help-idx {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--orange);
}

.page-contact .help-title {
  font-size: 16.5px;
  font-weight: 700;
}

.page-contact .help-desc {
  font-size: 13px;
  line-height: 1.68;
  color: var(--mist);
}

@media (min-width: 620px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-contact .resp-layout {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: stretch;
  }

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

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

@media (min-width: 1024px) {
  .page-contact .channel-layout {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: start;
  }

  .page-contact .addr-inner {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
    gap: 32px;
    align-items: center;
  }
}

@media (min-width: 1120px) {
  .page-contact .help-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel,
  .page-contact .channel::after,
  .page-contact .help-card,
  .page-contact .copy-btn {
    transition: none;
  }

  .page-contact .help-card:hover,
  .page-contact .help-card:focus-visible {
    transform: none;
  }
}
<<<END>>>