.page-contact .page-head {
  position: relative;
  padding: 28px 0 34px;
  border-bottom: 1px solid var(--hair);
  overflow: hidden;
}

.page-contact .page-head::after {
  content: "";
  position: absolute;
  right: -90px;
  bottom: -150px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle at 50% 50%, rgba(34, 224, 208, .18), transparent 66%);
  pointer-events: none;
}

.page-contact .breadcrumb {
  margin-bottom: 18px;
}

.page-contact .page-head__kicker {
  color: var(--cyan);
  letter-spacing: .14em;
}

.page-contact .page-head__title {
  margin: 10px 0 0;
  max-width: 20ch;
}

.page-contact .page-head__lede {
  margin: 14px 0 0;
  max-width: 64ch;
  color: var(--mist);
  line-height: 1.75;
}

/* ── 横向联络轨道 ── */

.page-contact .contact-rail {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  border-bottom: 1px solid var(--hair);
  background: linear-gradient(180deg, rgba(14, 22, 34, .55), rgba(6, 9, 15, .92));
}

.page-contact .contact-rail__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .2;
}

.page-contact .contact-rail__scrim {
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    repeating-linear-gradient(90deg, rgba(38, 51, 63, .42) 0 1px, transparent 1px 96px),
    linear-gradient(180deg, rgba(6, 9, 15, .74), rgba(6, 9, 15, .95));
}

.page-contact .contact-rail__inner {
  padding-top: 26px;
  padding-bottom: 28px;
}

.page-contact .contact-rail__heading {
  margin: 0 0 18px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-contact .contact-rail__grid {
  display: grid;
  gap: 0;
}

.page-contact .contact-rail__item {
  padding: 20px 0;
  border-bottom: 1px solid var(--hair);
}

.page-contact .contact-rail__item:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .contact-rail__label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-contact .contact-rail__value {
  margin: 10px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 3.6vw, 19px);
  font-weight: 500;
  line-height: 1.35;
  letter-spacing: -.01em;
  color: var(--text);
  font-variant-numeric: tabular-nums;
  overflow-wrap: anywhere;
}

.page-contact .contact-rail__value--sm {
  font-size: clamp(14px, 3.2vw, 17px);
  line-height: 1.55;
  overflow-wrap: break-word;
}

.page-contact .contact-rail__note {
  margin: 10px 0 0;
  max-width: 36ch;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .contact-rail__actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

/* ── 章节头部与引言 ── */

.page-contact .chapter__head {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 18px;
}

.page-contact .contact-lede {
  margin: 0 0 20px;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.76;
  color: var(--mist);
}

.page-contact .inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(34, 224, 208, .38);
  transition: border-color .2s var(--ease-out), color .2s var(--ease-out);
}

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

/* ── 01 分事项卡片 ── */

.page-contact .route-grid {
  display: grid;
  gap: 12px;
}

.page-contact .route-card {
  position: relative;
  display: block;
  padding: 20px 20px 18px;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  text-decoration: none;
  color: inherit;
  overflow: hidden;
  transition: border-color .24s var(--ease-out), background .24s var(--ease-out), transform .24s var(--ease-out);
}

.page-contact .route-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 0;
  background: var(--cyan);
  transition: height .28s var(--ease-out);
}

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

.page-contact .route-card:hover::before,
.page-contact .route-card:focus-visible::before {
  height: 100%;
}

.page-contact .route-card__code {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-contact .route-card__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  line-height: 1.28;
  color: var(--text);
}

.page-contact .route-card__text {
  margin: 10px 0 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .route-card__meta {
  display: block;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--hair);
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.62;
  color: var(--cyan);
  opacity: .82;
}

/* ── 02 反馈表单 ── */

.page-contact .feedback-split {
  display: grid;
  gap: 20px;
}

.page-contact .feedback-panel {
  padding: 22px 18px;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
}

.page-contact .field-grid {
  display: grid;
  gap: 16px;
}

.page-contact .field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
}

.page-contact .field__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--mist);
}

.page-contact .field__req {
  margin-left: 4px;
  color: var(--alert);
}

.page-contact .field__input,
.page-contact .field__select,
.page-contact .field__area {
  width: 100%;
  max-width: 100%;
  padding: 11px 12px;
  background: var(--steel);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.5;
  transition: border-color .2s var(--ease-out), box-shadow .2s var(--ease-out);
}

.page-contact .field__area {
  min-height: 118px;
  resize: vertical;
}

.page-contact .field__input::placeholder,
.page-contact .field__area::placeholder {
  color: rgba(166, 180, 194, .55);
}

.page-contact .field__input:focus,
.page-contact .field__select:focus,
.page-contact .field__area:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(34, 224, 208, .18);
}

.page-contact .field__select {
  appearance: none;
  padding-right: 36px;
  background-image:
    linear-gradient(45deg, transparent 50%, var(--cyan) 50%),
    linear-gradient(135deg, var(--cyan) 50%, transparent 50%);
  background-position: calc(100% - 18px) 52%, calc(100% - 13px) 52%;
  background-size: 5px 5px, 5px 5px;
  background-repeat: no-repeat;
}

.page-contact .field__select option {
  background: var(--ink-950);
  color: var(--text);
}

.page-contact .feedback-submit {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--hair);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
}

.page-contact .feedback-submit__note {
  flex: 1 1 220px;
  margin: 0;
  font-size: 13px;
  line-height: 1.66;
  color: var(--mist);
}

.page-contact .feedback-aside {
  display: grid;
  gap: 16px;
}

.page-contact .feedback-aside__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  filter: saturate(.86) contrast(1.04);
}

.page-contact .feedback-aside__note {
  padding: 18px 16px;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
}

.page-contact .feedback-aside__title {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-contact .feedback-aside__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .feedback-aside__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.66;
  color: var(--mist);
}

.page-contact .feedback-aside__list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  transform: rotate(45deg);
}

/* ── 03 响应时效 ── */

.page-contact .sla-strip {
  display: grid;
  gap: 0;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .sla-strip__cell {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px 18px;
  border-bottom: 1px solid var(--hair);
}

.page-contact .sla-strip__cell:last-child {
  border-bottom: 0;
}

.page-contact .sla-strip__value {
  font-family: var(--font-mono);
  font-size: clamp(26px, 5.4vw, 34px);
  font-weight: 500;
  line-height: 1;
  letter-spacing: -.02em;
  font-variant-numeric: tabular-nums;
}

.page-contact .sla-strip__value--cyan {
  color: var(--cyan);
}

.page-contact .sla-strip__value--gold {
  color: var(--gold);
}

.page-contact .sla-strip__label {
  font-size: 13.5px;
  line-height: 1.62;
  color: var(--mist);
}

.page-contact .sla-notes {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

.page-contact .sla-notes p {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

/* ── 04 服务范围 ── */

.page-contact .range-layout {
  display: grid;
  gap: 20px;
}

.page-contact .range-main {
  display: grid;
  gap: 12px;
}

.page-contact .range-main .prose {
  margin: 0;
  max-width: 68ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .range-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .range-list li {
  padding: 14px 16px;
  background: var(--panel);
  border: 1px solid var(--hair);
  border-radius: var(--radius);
  font-size: 14.5px;
  line-height: 1.68;
  color: var(--mist);
}

.page-contact .range-list strong {
  margin-right: 6px;
  color: var(--cyan);
  font-weight: 600;
}

/* ── 05 备案与条款 ── */

.page-contact .legal-section {
  padding-bottom: 52px;
}

.page-contact .legal-slab {
  position: relative;
  padding: 26px 20px 28px;
  background: var(--paper);
  color: var(--ink-950);
  border-radius: var(--radius);
  overflow: hidden;
}

.page-contact .legal-slab::after {
  content: "";
  position: absolute;
  top: -46px;
  right: -46px;
  width: 190px;
  height: 190px;
  background: repeating-linear-gradient(135deg, rgba(6, 9, 15, .07) 0 2px, transparent 2px 7px);
  pointer-events: none;
}

.page-contact .legal-slab__badge {
  display: inline-block;
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan-deep);
}

.page-contact .legal-slab__title {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-size: clamp(21px, 3.4vw, 28px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: .01em;
  color: var(--ink-950);
}

.page-contact .legal-slab__rows {
  margin: 18px 0 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(6, 9, 15, .14);
}

.page-contact .legal-slab__row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 18px;
  padding: 12px 0;
  border-bottom: 1px solid rgba(6, 9, 15, .14);
}

.page-contact .legal-slab__row dt {
  min-width: 104px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .08em;
  color: rgba(6, 9, 15, .56);
}

.page-contact .legal-slab__row dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  color: var(--ink-950);
  overflow-wrap: anywhere;
}

.page-contact .legal-slab__text {
  margin: 18px 0 0;
  max-width: 64ch;
  font-size: 14.5px;
  line-height: 1.74;
  color: rgba(6, 9, 15, .74);
}

.page-contact .legal-slab__actions {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ── 中等屏幕 ── */

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

  .page-contact .field--wide {
    grid-column: 1 / -1;
  }

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

  .page-contact .sla-strip__cell {
    padding: 22px 22px;
    border-bottom: 0;
    border-left: 1px solid var(--hair);
  }

  .page-contact .sla-strip__cell:first-child {
    border-left: 0;
  }

  .page-contact .legal-slab {
    padding: 32px 30px 34px;
  }
}

/* ── 桌面布局 ── */

@media (min-width: 860px) {
  .page-contact .page-head {
    padding: 40px 0 46px;
  }

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

  .page-contact .contact-rail__item {
    padding: 4px 30px;
    border-bottom: 0;
    border-left: 1px solid var(--hair);
  }

  .page-contact .contact-rail__item:first-child {
    padding-left: 0;
    border-left: 0;
  }

  .page-contact .contact-rail__item:last-child {
    padding-right: 0;
    padding-bottom: 4px;
  }

  .page-contact .chapter__head {
    gap: 22px;
    margin-bottom: 26px;
  }

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

  .page-contact .route-card {
    padding: 24px 24px 20px;
  }

  .page-contact .range-layout {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
    gap: 28px;
    align-items: start;
  }
}

@media (min-width: 960px) {
  .page-contact .feedback-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 24px;
    align-items: start;
  }

  .page-contact .feedback-panel {
    padding: 30px 28px;
  }
}

/* ── 减弱动效偏好 ── */

@media (prefers-reduced-motion: reduce) {
  .page-contact .route-card,
  .page-contact .route-card::before,
  .page-contact .field__input,
  .page-contact .field__select,
  .page-contact .field__area,
  .page-contact .inline-link {
    transition: none;
  }

  .page-contact .route-card:hover,
  .page-contact .route-card:focus-visible {
    transform: none;
  }
}