.page-contact {
  --card-pad: clamp(20px, 2.6vw, 28px);
  display: block;
}

/* ============ 首屏 ============ */
.page-contact .c-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(30px, 5vw, 64px) 0 clamp(34px, 5vw, 62px);
  background:
    radial-gradient(115% 85% at 88% -12%, rgba(59, 227, 220, .15), transparent 62%),
    linear-gradient(180deg, var(--ink-900), var(--ink-950));
  border-bottom: 1px solid var(--line-700);
}

.page-contact .c-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, rgba(39, 64, 92, .34) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(39, 64, 92, .34) 1px, transparent 1px);
  background-size: 96px 96px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 86%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, .9), transparent 86%);
}

.page-contact .c-hero__shell {
  position: relative;
  z-index: 1;
}

.page-contact .breadcrumb {
  margin: 0 0 clamp(22px, 3vw, 36px);
}

.page-contact .breadcrumb ol {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute-400);
}

.page-contact .breadcrumb li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--cyan-650);
}

.page-contact .breadcrumb a {
  color: var(--mute-400);
  text-decoration: none;
}

.page-contact .breadcrumb a:hover {
  color: var(--cyan-400);
}

.page-contact .c-hero__inner {
  position: relative;
  padding-left: clamp(16px, 3vw, 34px);
  border-left: 2px solid var(--line-700);
}

.page-contact .c-hero__inner::before {
  content: "";
  position: absolute;
  left: -2px;
  top: 0;
  width: 2px;
  height: 88px;
  background: linear-gradient(180deg, var(--cyan-400), transparent);
}

.page-contact .c-hero__kicker {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan-400);
}

.page-contact .c-hero__kicker::after {
  content: "";
  flex: 1 1 auto;
  max-width: 150px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-400), transparent);
}

.page-contact .c-hero__title {
  margin: 0 0 20px;
  color: var(--paper-050);
}

.page-contact .c-hero__lede {
  max-width: 44em;
  margin: 0;
  color: var(--body-text);
}

.page-contact .c-hero__strip {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 44px);
  background: var(--line-700);
  border: 1px solid var(--line-700);
}

.page-contact .c-hero__strip-item {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 14px 16px;
  background: var(--ink-900);
  color: var(--paper-050);
  font-size: 15px;
  text-decoration: none;
  transition: background .2s var(--ease), color .2s var(--ease);
}

.page-contact .c-hero__strip-item .mono {
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--cyan-400);
}

.page-contact .c-hero__strip-item:hover {
  background: var(--ink-800);
  color: var(--cyan-400);
}

/* ============ 目录刻度 + 主列 ============ */
.page-contact .rail-shell {
  padding-top: clamp(24px, 3.6vw, 44px);
  padding-bottom: clamp(24px, 3.6vw, 44px);
}

.page-contact .rail {
  display: flex;
  gap: 8px;
  margin: 0 0 clamp(22px, 3vw, 34px);
  padding: 0 0 12px;
  overflow-x: auto;
  border-bottom: 1px solid var(--line-700);
  scrollbar-width: thin;
}

.page-contact .rail__caption {
  display: none;
}

.page-contact .rail__link {
  flex: none;
  padding: 6px 11px;
  border: 1px solid var(--line-700);
  color: var(--mute-400);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .08em;
  text-decoration: none;
  white-space: nowrap;
  transition: color .18s var(--ease), background .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .rail__link:hover {
  color: var(--cyan-400);
  border-color: var(--cyan-650);
}

.page-contact .rail__link[aria-current="true"] {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
  color: var(--ink-950);
}

/* ============ 章节轴 ============ */
.page-contact .c-block {
  position: relative;
  padding: clamp(30px, 5vw, 56px) 0;
}

.page-contact .c-block + .c-block::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 56px;
  height: 2px;
  background: var(--line-700);
}

.page-contact .c-block--panel {
  padding-left: clamp(16px, 2.6vw, 30px);
  padding-right: clamp(16px, 2.6vw, 30px);
  background: rgba(15, 30, 51, .72);
  border: 1px solid var(--line-700);
}

.page-contact .c-head {
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .c-head__num {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan-400);
}

.page-contact .c-head__num::after {
  content: "";
  flex: 1 1 auto;
  max-width: 110px;
  height: 1px;
  background: linear-gradient(90deg, var(--cyan-650), transparent);
}

.page-contact .c-head__title {
  margin: 0 0 12px;
  color: var(--paper-050);
}

.page-contact .c-head__note {
  max-width: 52em;
  margin: 0;
  color: var(--mute-400);
  font-size: 15.5px;
  line-height: 1.8;
}

/* ============ 图 ============ */
.page-contact .c-figure {
  margin: 0 0 clamp(26px, 4vw, 42px);
}

.page-contact .c-figure__media {
  aspect-ratio: 12 / 7;
}

.page-contact .c-hours__media {
  aspect-ratio: 7 / 4;
}

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

.page-contact .figure__caption {
  margin-top: 10px;
  color: var(--mute-400);
  font-size: 13px;
  letter-spacing: .02em;
}

/* ============ 路径卡：递减排布 ============ */
.page-contact .path-stack {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
}

.page-contact .path-card {
  position: relative;
  padding: var(--card-pad);
  background: var(--ink-900);
  border: 1px solid var(--line-700);
  border-left: 3px solid var(--cyan-650);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

.page-contact .path-card--lead {
  background:
    linear-gradient(135deg, rgba(59, 227, 220, .08), transparent 58%),
    var(--ink-900);
  border-left-color: var(--cyan-400);
}

.page-contact .path-card__rank {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: .16em;
  color: var(--cyan-400);
  box-shadow: inset 0 0 0 1px var(--cyan-650);
}

.page-contact .path-card--lead .path-card__rank {
  background: var(--cyan-400);
  color: var(--ink-950);
  box-shadow: none;
}

.page-contact .path-card__title {
  margin: 0 0 10px;
  color: var(--paper-050);
}

.page-contact .path-card__body {
  max-width: 46em;
  margin: 0;
  color: var(--body-text);
  font-size: 15.5px;
  line-height: 1.8;
}

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

/* ============ 联系方式行 ============ */
.page-contact .contact-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin: 18px 0 0;
  padding: 12px 14px;
  background: var(--ink-800);
  border: 1px dashed var(--line-700);
}

.page-contact .contact-line__value {
  font-size: clamp(14px, 2.2vw, 17px);
  letter-spacing: .02em;
  color: var(--cyan-400);
  word-break: break-all;
}

.page-contact .copy-state {
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--mute-400);
  min-height: 1em;
}

.page-contact .copy-state[data-state="ok"] {
  color: var(--amber-300);
}

/* ============ 折叠说明 ============ */
.page-contact .fold {
  margin-top: 18px;
  padding-top: 12px;
  border-top: 1px solid var(--line-700);
}

.page-contact .fold__summary {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
  font-size: 14px;
  color: var(--mute-400);
  list-style: none;
  transition: color .18s var(--ease);
}

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

.page-contact .fold__summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--mono);
  font-size: 16px;
  color: var(--cyan-400);
}

.page-contact .fold[open] .fold__summary::after {
  content: "–";
}

.page-contact .fold__summary:hover {
  color: var(--paper-050);
}

.page-contact .fold__idx {
  padding: 1px 6px;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--cyan-400);
  box-shadow: inset 0 0 0 1px var(--cyan-650);
}

.page-contact .fold__body {
  padding: 12px 0 2px;
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.8;
}

.page-contact .fold__body ul {
  margin: 0;
  padding-left: 18px;
}

.page-contact .fold__body li + li {
  margin-top: 6px;
}

/* ============ 受理范围表 ============ */
.page-contact .scope-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line-700);
}

.page-contact .scope-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px 18px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-700);
}

.page-contact .scope-row__key {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--cyan-400);
}

.page-contact .scope-row__topic {
  color: var(--paper-050);
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -.01em;
}

.page-contact .scope-row__where {
  justify-self: start;
  padding: 4px 9px;
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--cyan-400);
  border: 1px solid var(--line-700);
}

.page-contact .scope-row__note {
  margin: 0;
  color: var(--body-text);
  font-size: 14.5px;
  line-height: 1.78;
}

/* ============ 提交清单 ============ */
.page-contact .prepare-grid {
  display: grid;
  gap: clamp(22px, 3vw, 40px);
}

.page-contact .prepare-intro .prose {
  max-width: 34em;
  margin: 0;
  color: var(--body-text);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-contact .checklist {
  display: grid;
  gap: 1px;
  margin: 0;
  padding: 0;
  list-style: none;
  background: var(--line-700);
  border: 1px solid var(--line-700);
}

.page-contact .checklist__item {
  position: relative;
  background: var(--ink-950);
}

.page-contact .checklist__box {
  position: absolute;
  left: 16px;
  top: 18px;
  width: 16px;
  height: 16px;
  margin: 0;
  -webkit-appearance: none;
  appearance: none;
  background: var(--ink-800);
  border: 1px solid var(--cyan-650);
  cursor: pointer;
}

.page-contact .checklist__box:checked {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-contact .checklist__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 4px;
  height: 9px;
  border: solid var(--ink-950);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.page-contact .checklist__box:focus-visible {
  outline: 2px solid var(--amber-500);
  outline-offset: 2px;
}

.page-contact .checklist__item label {
  display: block;
  padding: 16px 18px 16px 48px;
  cursor: pointer;
}

.page-contact .checklist__item strong {
  display: block;
  margin-bottom: 4px;
  color: var(--paper-050);
  font-size: 16px;
}

.page-contact .checklist__item span {
  display: block;
  color: var(--body-text);
  font-size: 14.5px;
  line-height: 1.7;
}

/* ============ 服务时段 ============ */
.page-contact .hours-grid {
  display: grid;
  gap: clamp(22px, 3.5vw, 44px);
  align-items: center;
}

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

.page-contact .hours-list li {
  position: relative;
  padding-left: 20px;
  color: var(--body-text);
  font-size: 15.5px;
  line-height: 1.78;
}

.page-contact .hours-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 9px;
  height: 1px;
  background: var(--cyan-400);
}

.page-contact .hours-body__note {
  margin: 20px 0 0;
  padding-left: clamp(14px, 2vw, 20px);
  border-left: 2px solid var(--cyan-650);
  color: var(--mute-400);
  font-size: 14.5px;
  line-height: 1.8;
}

/* ============ 地址印章区 ============ */
.page-contact .stamp-grid {
  display: grid;
  gap: 1px;
  background: var(--line-700);
  border: 1px solid var(--line-700);
}

.page-contact .stamp {
  padding: clamp(18px, 2.4vw, 26px);
  background: var(--ink-900);
}

.page-contact .stamp__label {
  display: inline-block;
  margin-bottom: 14px;
  padding: 3px 9px;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--cyan-400);
  border: 1px solid var(--cyan-650);
}

.page-contact .stamp__value {
  margin: 0;
  color: var(--paper-050);
  font-size: 16px;
  line-height: 1.72;
}

.page-contact .stamp__value--code {
  color: var(--amber-300);
  letter-spacing: .04em;
}

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

/* ============ 纠错与共建 ============ */
.page-contact .partner-grid {
  display: grid;
  gap: clamp(16px, 2.6vw, 26px);
}

.page-contact .partner-card {
  padding: var(--card-pad);
}

.page-contact .partner-card .card__title {
  margin: 10px 0 10px;
  font-size: 18px;
  color: var(--paper-050);
}

.page-contact .partner-card .card__body {
  margin: 0;
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.8;
}

/* ============ 收尾网格 ============ */
.page-contact .contact-outro {
  height: 110px;
  margin-top: clamp(24px, 4vw, 44px);
  background-image:
    linear-gradient(to right, var(--line-700) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-700) 1px, transparent 1px);
  background-size: 96px 22px;
  opacity: .6;
  -webkit-mask-image: linear-gradient(180deg, #000, transparent);
  mask-image: linear-gradient(180deg, #000, transparent);
}

/* ============ 响应式 ============ */
@media (min-width: 680px) {
  .page-contact .c-hero__strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 760px) {
  .page-contact .stamp-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 3fr) minmax(0, 3fr);
  }

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

@media (min-width: 860px) {
  .page-contact .scope-row {
    grid-template-columns: 52px minmax(0, 1.05fr) 158px minmax(0, 1.35fr);
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .path-card--lead {
    width: 100%;
  }

  .page-contact .path-card--p2 {
    width: 87%;
    margin-left: 6.5%;
  }

  .page-contact .path-card--p3 {
    width: 74%;
    margin-left: 13%;
  }

  .page-contact .hours-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  }
}

@media (min-width: 960px) {
  .page-contact .prepare-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }
}

@media (min-width: 1080px) {
  .page-contact .rail-shell {
    display: grid;
    grid-template-columns: 168px minmax(0, 1fr);
    gap: 0 48px;
    align-items: start;
  }

  .page-contact .rail {
    display: block;
    position: sticky;
    top: calc(var(--header-h) + 28px);
    margin: 0;
    padding: 4px 0;
    overflow: visible;
    border-bottom: 0;
    border-left: 1px solid var(--line-700);
  }

  .page-contact .rail__caption {
    display: block;
    margin: 0;
    padding: 0 0 12px 16px;
    font-size: 11px;
    letter-spacing: .18em;
    color: var(--mute-400);
  }

  .page-contact .rail__link {
    display: block;
    margin-left: -1px;
    padding: 9px 12px 9px 16px;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
  }

  .page-contact .rail__link:hover {
    color: var(--cyan-400);
    border-left-color: var(--cyan-650);
  }

  .page-contact .rail__link[aria-current="true"] {
    background: transparent;
    color: var(--cyan-400);
    border-left-color: var(--cyan-400);
  }

  .page-contact .c-block:first-child {
    padding-top: 0;
  }

  .page-contact .c-block:first-child::before {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .c-hero__strip-item,
  .page-contact .rail__link,
  .page-contact .fold__summary {
    transition: none;
  }
}