.page-contact {
  --ct-grid: rgba(40, 64, 58, .38);
  --ct-line: rgba(40, 64, 58, .86);
  --ct-line-soft: rgba(40, 64, 58, .58);
  --ct-cell: rgba(22, 48, 42, .62);
  position: relative;
  background-color: var(--ink-green-900);
  background-image:
    linear-gradient(to right, var(--ct-grid) 1px, transparent 1px),
    linear-gradient(to bottom, var(--ct-grid) 1px, transparent 1px);
  background-size: 64px 64px;
  background-position: center top;
  color: var(--bone-85);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  overflow-x: hidden;
}

.page-contact a:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--volt-blue);
  outline-offset: 2px;
}

.page-contact .lead {
  max-width: 34em;
}

/* ---------- 首屏 ---------- */
.page-contact .ct-masthead {
  padding: 28px 0 30px;
}

.page-contact .ct-masthead__grid {
  display: grid;
  gap: 24px;
  margin-top: 22px;
}

.page-contact .ct-head__index,
.page-contact .ct-rail__link,
.page-contact .ct-stats dt,
.page-contact .ct-stats dd,
.page-contact .ct-aside__label,
.page-contact .contact-lines dt,
.page-contact .contact-lines dd,
.page-contact .template-block,
.page-contact .ct-next__kicker {
  font-family: var(--font-mono);
}

.page-contact .ct-stats {
  margin: 0;
  display: grid;
  gap: 1px;
  background: var(--ct-line-soft);
  border: 1px solid var(--ct-line-soft);
}

.page-contact .ct-stats__cell {
  background: rgba(11, 31, 26, .82);
  padding: 11px 14px 12px;
}

.page-contact .ct-stats dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: .12em;
  color: var(--slate-600);
}

.page-contact .ct-stats dd {
  margin: 5px 0 0;
  font-size: 16px;
  color: var(--flare-orange);
  font-variant-numeric: tabular-nums;
}

/* ---------- 坐标索引带 ---------- */
.page-contact .ct-rail {
  border-top: 1px solid var(--ct-line-soft);
  border-bottom: 1px solid var(--ct-line-soft);
  background: rgba(22, 48, 42, .46);
}

.page-contact .ct-rail__inner {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-top: 11px;
  padding-bottom: 11px;
  scrollbar-width: none;
}

.page-contact .ct-rail__inner::-webkit-scrollbar {
  display: none;
}

.page-contact .ct-rail__link {
  flex: 0 0 auto;
  padding: 7px 13px;
  border: 1px solid var(--ct-line-soft);
  color: var(--bone-70);
  font-size: 12px;
  letter-spacing: .06em;
  text-decoration: none;
  white-space: nowrap;
  transition: color .2s ease, border-color .2s ease, background-color .2s ease;
}

.page-contact .ct-rail__link:hover {
  color: var(--volt-blue);
  border-color: var(--volt-blue);
}

.page-contact .ct-rail__link.is-current,
.page-contact .ct-rail__link[aria-current="true"] {
  background: var(--volt-blue);
  border-color: var(--volt-blue);
  color: var(--ink-green-900);
}

/* ---------- 主体两栏 ---------- */
.page-contact .ct-body {
  display: grid;
  gap: 34px;
  padding-top: 34px;
  padding-bottom: 56px;
}

.page-contact .ct-aside__figure {
  margin: 0 0 16px;
  opacity: .5;
}

.page-contact .ct-aside__card {
  position: relative;
  border: 1px solid var(--ct-line-soft);
  background: linear-gradient(180deg, rgba(22, 48, 42, .92), rgba(11, 31, 26, .58));
  padding: 18px 16px 20px;
}

.page-contact .ct-aside__card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 46px;
  height: 3px;
  background: var(--flare-orange);
}

.page-contact .ct-aside__label {
  margin: 0 0 8px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--volt-blue);
}

.page-contact .contact-lines {
  margin: 0;
  padding: 0;
}

.page-contact .contact-lines__row {
  display: grid;
  gap: 3px;
  padding: 12px 0;
  border-bottom: 1px dashed var(--ct-line-soft);
}

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

.page-contact .contact-lines dt {
  margin: 0;
  font-size: 11px;
  letter-spacing: .1em;
  color: var(--slate-600);
}

.page-contact .contact-lines dd {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.5;
  color: var(--bone-050);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.page-contact .ct-aside__foot {
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--ct-line-soft);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--bone-45);
}

/* ---------- 右栏区块 ---------- */
.page-contact .ct-block {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--ct-line-soft);
}

.page-contact .ct-block:last-child {
  padding-bottom: 0;
  margin-bottom: 0;
  border-bottom: 0;
}

.page-contact .ct-head {
  display: grid;
  gap: 7px;
  margin-bottom: 20px;
}

.page-contact .ct-head__index {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--flare-orange);
}

.page-contact .ct-head__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.01em;
  color: var(--bone-050);
}

.page-contact .ct-head__note {
  margin: 0;
  max-width: 40em;
  font-size: 14.5px;
  color: var(--bone-70);
}

/* ---------- 模板 ---------- */
.page-contact .template-block {
  background: var(--paper-000);
  color: var(--ink-green-900);
  border-left: 4px solid var(--flare-orange);
  padding: 16px 16px 6px;
}

.page-contact .template-block__title {
  margin: 0 0 10px;
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: rgba(11, 31, 26, .55);
}

.page-contact .template-block__row {
  display: grid;
  gap: 2px;
  padding: 9px 0;
  border-bottom: 1px dotted rgba(11, 31, 26, .26);
}

.page-contact .template-block__row:last-child {
  border-bottom: 0;
}

.page-contact .template-block__key {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .04em;
  color: var(--ink-green-900);
}

.page-contact .template-block__val {
  font-size: 13px;
  line-height: 1.5;
  color: rgba(11, 31, 26, .72);
}

.page-contact .ct-checks {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .ct-checks li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--bone-70);
}

.page-contact .ct-checks li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .42em;
  width: 10px;
  height: 10px;
  border: 1px solid var(--volt-blue);
}

/* ---------- 流程 ---------- */
.page-contact .ct-flow__figure {
  margin: 0 0 20px;
}

.page-contact .flow {
  border-top: 1px solid var(--ct-line-soft);
}

.page-contact .flow__step {
  border-bottom: 1px solid var(--ct-line-soft);
}

.page-contact .flow__head {
  display: grid;
  grid-template-columns: 36px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 14px 2px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .flow__no {
  width: 30px;
  height: 30px;
  display: grid;
  place-items: center;
  border: 1px solid var(--flare-orange);
  color: var(--flare-orange);
  font-family: var(--font-mono);
  font-size: 12px;
  font-variant-numeric: tabular-nums;
  transition: background-color .2s ease, color .2s ease;
}

.page-contact .flow__step[open] .flow__no {
  background: var(--flare-orange);
  color: var(--ink-green-900);
}

.page-contact .flow__name {
  font-size: 16px;
  font-weight: 700;
  color: var(--bone-050);
  transition: color .2s ease;
}

.page-contact .flow__head:hover .flow__name {
  color: var(--volt-blue);
}

.page-contact .flow__tag {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .08em;
  color: var(--slate-600);
  white-space: nowrap;
}

.page-contact .flow__body {
  padding: 0 2px 16px 48px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--bone-70);
}

.page-contact .flow__body p {
  margin: 0;
  max-width: 38em;
}

/* ---------- 合作与建议 ---------- */
.page-contact .partner-grid {
  display: grid;
  gap: 18px;
}

.page-contact .partner-card {
  position: relative;
  border: 1px solid var(--ct-line-soft);
  background: var(--ct-cell);
  padding: 20px 16px 18px;
}

.page-contact .partner-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--clay-600);
}

.page-contact .partner-card--volt::before {
  background: var(--volt-blue);
}

.page-contact .partner-card__title {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 700;
  color: var(--bone-050);
}

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

.page-contact .partner-card__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.55;
  color: var(--bone-70);
}

.page-contact .partner-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 6px;
  height: 1px;
  background: var(--slate-600);
}

.page-contact .partner-card__foot {
  margin: 15px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--ct-line-soft);
  font-size: 12.5px;
  line-height: 1.55;
  color: var(--bone-45);
}

/* ---------- 常见误区 ---------- */
.page-contact .pitfall-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
}

.page-contact .pitfall {
  display: grid;
  grid-template-columns: 24px minmax(0, 1fr);
  gap: 12px;
  padding: 14px 0;
  border-top: 1px solid var(--ct-line-soft);
}

.page-contact .pitfall__mark {
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.5;
  color: var(--clay-600);
}

.page-contact .pitfall__title {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 700;
  color: var(--bone-050);
}

.page-contact .pitfall__note {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.58;
  color: var(--bone-70);
}

/* ---------- 尾部延伸 ---------- */
.page-contact .ct-next {
  border-top: 1px solid var(--ct-line-soft);
  background: rgba(22, 48, 42, .38);
  padding: 32px 0 46px;
}

.page-contact .ct-next__grid {
  display: grid;
  gap: 14px;
}

.page-contact .ct-next__item {
  display: grid;
  gap: 6px;
  border: 1px solid var(--ct-line-soft);
  padding: 16px;
  text-decoration: none;
  color: inherit;
  transition: border-color .2s ease, background-color .2s ease, transform .2s ease;
}

.page-contact .ct-next__item:hover {
  border-color: var(--volt-blue);
  background: var(--volt-soft);
  transform: translateY(-2px);
}

.page-contact .ct-next__kicker {
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--volt-blue);
}

.page-contact .ct-next__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--bone-050);
}

.page-contact .ct-next__note {
  font-size: 13px;
  line-height: 1.55;
  color: var(--bone-70);
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-contact .contact-lines__row {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }

  .page-contact .template-block__row {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 16px;
    align-items: baseline;
  }
}

@media (min-width: 760px) {
  .page-contact .ct-head__title {
    font-size: 30px;
  }

  .page-contact .partner-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .ct-next__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .pitfall-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0 26px;
  }
}

@media (min-width: 900px) {
  .page-contact .ct-masthead {
    padding: 44px 0 36px;
  }

  .page-contact .ct-masthead__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
    gap: 44px;
    align-items: end;
  }

  .page-contact .ct-stats {
    grid-template-columns: 1fr;
  }

  .page-contact .ct-body {
    padding-top: 46px;
    padding-bottom: 76px;
  }
}

@media (min-width: 1000px) {
  .page-contact .ct-body {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7.6fr);
    gap: 52px;
    align-items: start;
  }

  .page-contact .ct-aside {
    position: sticky;
    top: calc(var(--header-h) + 22px);
  }
}

@media (max-width: 520px) {
  .page-contact .flow__head {
    grid-template-columns: 32px minmax(0, 1fr);
    row-gap: 4px;
  }

  .page-contact .flow__tag {
    grid-column: 2;
  }

  .page-contact .flow__body {
    padding-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .ct-rail__link,
  .page-contact .flow__no,
  .page-contact .flow__name,
  .page-contact .ct-next__item {
    transition: none;
  }

  .page-contact .ct-next__item:hover {
    transform: none;
  }
}