.page-contact {
  --pc-side-w: 300px;
  background:
    radial-gradient(920px 520px at 92% -8%, rgba(53, 240, 154, .10), transparent 62%),
    radial-gradient(760px 480px at 2% 6%, rgba(116, 216, 255, .07), transparent 60%),
    var(--c-deep);
  color: var(--c-text);
  padding-bottom: 76px;
}

.page-contact .mono {
  font-family: var(--f-data);
  font-variant-numeric: tabular-nums;
  letter-spacing: .02em;
}

.page-contact .eyebrow {
  margin: 0 0 12px;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumbs {
  padding-top: 22px;
}

.page-contact .breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-family: var(--f-data);
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--c-muted);
}

.page-contact .breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 10px;
}

.page-contact .breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: var(--c-line);
}

.page-contact .breadcrumb-item a {
  color: var(--c-muted);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}

.page-contact .breadcrumb-item a:hover,
.page-contact .breadcrumb-item a:focus-visible {
  color: var(--c-green);
  border-bottom-color: var(--c-green);
}

.page-contact .breadcrumb-item[aria-current="page"] {
  color: var(--c-text);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  border-bottom: 1px solid var(--c-line);
}

.page-contact .contact-hero__grid {
  display: grid;
  gap: 28px;
  padding: 26px 0 42px;
}

.page-contact .contact-hero h1 {
  margin: 0 0 18px;
  font-size: 30px;
  line-height: 1.18;
  font-weight: 900;
  letter-spacing: -.02em;
  max-width: 20ch;
}

.page-contact .contact-hero__lead {
  margin: 0 0 26px;
  max-width: 48ch;
  color: var(--c-muted);
  font-size: 16px;
  line-height: 1.8;
}

.page-contact .contact-hero__facts {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 14px;
  color: var(--c-muted);
}

.page-contact .contact-hero__facts li {
  position: relative;
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
  padding-left: 16px;
}

.page-contact .contact-hero__facts li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  border: 1.5px solid var(--c-green);
}

.page-contact .contact-hero__facts .mono {
  color: var(--c-text);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-contact .contact-hero__figure {
  margin: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-midnight);
}

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

/* ---------- 双栏骨架 ---------- */
.page-contact .contact-layout {
  display: grid;
  gap: 40px;
  padding-top: 44px;
}

.page-contact .contact-section + .contact-section {
  margin-top: 52px;
  padding-top: 52px;
  border-top: 1px solid var(--c-line);
}

/* ---------- 渠道卡 ---------- */
.page-contact .channel-list {
  display: grid;
  gap: 16px;
  margin-top: 26px;
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 22px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: linear-gradient(180deg, var(--c-panel) 0%, var(--c-midnight) 100%);
  transition: border-color var(--t-fast), transform var(--t-fast);
}

.page-contact .channel-card:hover {
  border-color: var(--c-green);
  transform: translateY(-1px);
}

.page-contact .channel-card__sigil {
  align-self: flex-start;
  padding: 5px 12px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-pill);
  font-size: 12px;
  letter-spacing: .14em;
}

.page-contact .channel-card--mail .channel-card__sigil {
  color: var(--c-green);
  border-color: rgba(53, 240, 154, .42);
  background: rgba(53, 240, 154, .10);
}

.page-contact .channel-card--tel .channel-card__sigil {
  color: var(--c-amber);
  border-color: rgba(255, 165, 61, .42);
  background: rgba(255, 165, 61, .10);
}

.page-contact .channel-card--addr .channel-card__sigil {
  color: var(--c-violet);
  border-color: rgba(155, 107, 255, .45);
  background: rgba(155, 107, 255, .12);
}

.page-contact .channel-card__name {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .02em;
}

.page-contact .channel-card__value {
  margin: 0;
  font-family: var(--f-data);
  font-variant-numeric: tabular-nums;
  font-size: 13px;
  line-height: 1.65;
  letter-spacing: .02em;
  word-break: break-all;
}

.page-contact .channel-card__value a {
  color: var(--c-green);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 240, 154, .38);
  transition: border-color var(--t-fast);
}

.page-contact .channel-card__value a:hover,
.page-contact .channel-card__value a:focus-visible {
  border-bottom-color: var(--c-green);
}

.page-contact .channel-card--tel .channel-card__value {
  font-size: 22px;
  letter-spacing: .08em;
  word-break: normal;
}

.page-contact .channel-card__use {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.75;
}

.page-contact .channel-card__hint {
  margin: 0;
  margin-top: auto;
  padding-top: 12px;
  border-top: 1px dashed var(--c-line);
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.7;
}

/* ---------- 反馈范围 ---------- */
.page-contact .topic-list {
  display: grid;
  gap: 14px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .topic-row {
  display: grid;
  gap: 14px;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: var(--c-midnight);
  transition: border-color var(--t-fast);
}

.page-contact .topic-row:hover {
  border-color: rgba(116, 216, 255, .45);
}

.page-contact .topic-row__tag {
  justify-self: start;
  align-self: start;
}

.page-contact .topic-row__title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.5;
}

.page-contact .topic-row__body p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.78;
}

.page-contact .topic-row__body .topic-row__route {
  margin-top: 12px;
  font-family: var(--f-data);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--c-ice);
}

/* ---------- 处理流程 ---------- */
.page-contact .flow {
  display: grid;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .flow__step {
  position: relative;
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 18px;
  padding-bottom: 26px;
}

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

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  left: 19px;
  top: 42px;
  bottom: 0;
  width: 1px;
  background: linear-gradient(180deg, var(--c-line), rgba(34, 52, 92, 0));
}

.page-contact .flow__step:last-child::before {
  display: none;
}

.page-contact .flow__node {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1.5px solid var(--c-line);
  background: var(--c-panel);
  color: var(--c-green);
  font-size: 12px;
  letter-spacing: .06em;
}

.page-contact .flow__title {
  margin: 9px 0 6px;
  font-size: 16px;
  font-weight: 700;
}

.page-contact .flow__body p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.78;
}

/* ---------- 地址说明 ---------- */
.page-contact .address-panel {
  display: grid;
  margin-top: 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-midnight);
}

.page-contact .address-panel__figure {
  margin: 0;
  background: var(--c-panel);
}

.page-contact .address-panel__figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .address-panel__body {
  padding: 26px 22px;
}

.page-contact .address-panel__value {
  margin: 0 0 16px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--c-line);
  font-size: 15px;
  line-height: 1.6;
  color: var(--c-text);
}

.page-contact .address-panel__body p {
  margin: 0 0 14px;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.8;
}

.page-contact .address-panel__body p:last-child {
  margin-bottom: 0;
}

/* ---------- 站点信息 ---------- */
.page-contact .site-facts {
  display: grid;
  gap: 1px;
  margin: 24px 0 0;
  padding: 0;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  overflow: hidden;
  background: var(--c-line);
}

.page-contact .site-facts__row {
  display: grid;
  gap: 8px;
  padding: 18px 20px;
  background: var(--c-panel);
}

.page-contact .site-facts dt {
  font-family: var(--f-data);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--c-muted);
}

.page-contact .site-facts dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.65;
}

/* ---------- 自查引导 ---------- */
.page-contact .guide-list {
  display: grid;
  gap: 12px;
  margin-top: 24px;
}

.page-contact .guide-item {
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: var(--c-panel);
  transition: border-color var(--t-fast);
}

.page-contact .guide-item[open] {
  border-color: rgba(53, 240, 154, .42);
}

.page-contact .guide-item summary {
  position: relative;
  display: block;
  padding: 18px 52px 18px 20px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  list-style: none;
}

.page-contact .guide-item summary::-webkit-details-marker {
  display: none;
}

.page-contact .guide-item summary:focus-visible {
  outline: 2px solid var(--c-green);
  outline-offset: -2px;
  border-radius: var(--r-card);
}

.page-contact .guide-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-data);
  font-size: 18px;
  line-height: 1;
  color: var(--c-green);
  transition: transform var(--t-fast);
}

.page-contact .guide-item[open] summary::after {
  transform: translateY(-50%) rotate(45deg);
}

.page-contact .guide-item__body {
  display: grid;
  gap: 14px;
  justify-items: start;
  padding: 0 20px 20px;
}

.page-contact .guide-item__body p {
  margin: 0;
  color: var(--c-muted);
  font-size: 14px;
  line-height: 1.8;
}

/* ---------- 侧栏 ---------- */
.page-contact .contact-layout__aside {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-contact .side-card {
  padding: 18px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--r-card);
  background: var(--c-panel);
}

.page-contact .side-card__label {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--c-muted);
}

.page-contact .side-card__status {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 12px;
  font-family: var(--f-data);
  font-variant-numeric: tabular-nums;
  font-size: 15px;
  letter-spacing: .03em;
  color: var(--c-text);
}

.page-contact .side-card__note {
  margin: 0;
  color: var(--c-muted);
  font-size: 13px;
  line-height: 1.75;
}

.page-contact .side-card--status {
  border-color: rgba(53, 240, 154, .36);
  background: linear-gradient(180deg, rgba(53, 240, 154, .11) 0%, var(--c-panel) 100%);
}

.page-contact .side-nav {
  display: grid;
  gap: 2px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .side-nav a {
  display: block;
  padding: 9px 10px;
  border-radius: var(--r-sm);
  color: var(--c-muted);
  font-size: 14px;
  text-decoration: none;
  transition: color var(--t-fast), background var(--t-fast);
}

.page-contact .side-nav a:hover,
.page-contact .side-nav a:focus-visible {
  color: var(--c-text);
  background: rgba(116, 216, 255, .10);
}

.page-contact .side-card--link .btn {
  margin-top: 16px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 700px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: center;
    gap: 48px;
    padding: 40px 0 54px;
  }

  .page-contact .contact-hero h1 {
    font-size: 40px;
  }

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

  .page-contact .channel-card--mail {
    grid-column: 1 / -1;
  }

  .page-contact .topic-row {
    grid-template-columns: 128px minmax(0, 1fr);
    align-items: start;
    gap: 22px;
    padding: 22px 24px;
  }

  .page-contact .address-panel {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: stretch;
  }

  .page-contact .address-panel__figure img {
    height: 100%;
  }

  .page-contact .address-panel__body {
    padding: 32px 30px;
  }

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

@media (min-width: 1024px) {
  .page-contact .contact-hero h1 {
    font-size: 46px;
  }

  .page-contact .contact-layout {
    grid-template-columns: minmax(0, 1fr) var(--pc-side-w);
    gap: 60px;
    padding-top: 60px;
  }

  .page-contact .contact-section + .contact-section {
    margin-top: 68px;
    padding-top: 68px;
  }

  .page-contact .contact-layout__aside {
    position: sticky;
    top: 104px;
  }
}

@media (min-width: 1200px) {
  .page-contact .channel-card--mail .channel-card__value {
    font-size: 15px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .topic-row,
  .page-contact .guide-item,
  .page-contact .guide-item summary::after,
  .page-contact .side-nav a,
  .page-contact .channel-card__value a,
  .page-contact .breadcrumb-item a {
    transition: none;
  }

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