.page-contact {
  --pc-gap: clamp(28px, 4vw, 56px);
  --pc-hair-line: rgba(28, 31, 38, 0.14);
  background: var(--bs-paper);
  color: var(--bs-ink);
  overflow-x: hidden;
}

.page-contact .pc-crumb {
  margin-bottom: 28px;
}

/* ---------- Hero ---------- */

.page-contact .pc-hero {
  position: relative;
  padding: calc(var(--bs-header-h) + 56px) 0 64px;
  background: var(--bs-ink);
  color: var(--bs-paper);
  overflow: hidden;
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    repeating-linear-gradient(90deg, rgba(0, 168, 232, 0.16) 0 1px, transparent 1px 80px),
    repeating-linear-gradient(0deg, rgba(0, 168, 232, 0.07) 0 1px, transparent 1px 80px);
  pointer-events: none;
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--bs-ice) 0%, var(--bs-lime) 100%);
}

.page-contact .pc-hero .bs-shell {
  position: relative;
  z-index: 1;
}

.page-contact .pc-hero .bs-breadcrumb,
.page-contact .pc-hero .bs-breadcrumb a {
  color: rgba(255, 255, 255, 0.62);
}

.page-contact .pc-hero .bs-breadcrumb a:hover {
  color: var(--bs-lime);
}

.page-contact .pc-hero .bs-eyebrow {
  color: var(--bs-ice-light);
}

.page-contact .pc-hero .bs-eyebrow::before {
  background: var(--bs-ice);
}

.page-contact .pc-hero__title {
  color: var(--bs-paper);
  max-width: 16em;
}

.page-contact .pc-hero__sub {
  max-width: 34em;
  color: rgba(255, 255, 255, 0.74);
  margin-top: 20px;
}

.page-contact .pc-hero__grid {
  display: grid;
  gap: 34px;
  align-items: end;
}

.page-contact .pc-hero__panel {
  margin: 0;
  padding: 4px 20px;
  border: 1px solid var(--bs-hair-dark);
  border-top: 2px solid var(--bs-lime);
  background: rgba(255, 255, 255, 0.04);
}

.page-contact .pc-kv {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--bs-hair-dark);
}

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

.page-contact .pc-kv dt {
  font-size: 13px;
  letter-spacing: 0.08em;
  color: rgba(255, 255, 255, 0.6);
}

.page-contact .pc-kv dd {
  margin: 0;
  font-size: 14px;
  color: var(--bs-ice-light);
  white-space: nowrap;
}

/* ---------- 主区域骨架 ---------- */

.page-contact .pc-main {
  padding: 72px 0 0;
}

.page-contact .pc-split {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .pc-split__main,
.page-contact .pc-split__side {
  min-width: 0;
}

.page-contact .pc-head {
  display: grid;
  gap: 14px;
}

.page-contact .pc-head__num {
  margin: 0;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  line-height: 1;
  padding-left: 12px;
  border-left: 2px solid var(--bs-ice);
  color: var(--bs-ice-deep);
}

.page-contact .pc-head .bs-measure {
  color: rgba(28, 31, 38, 0.68);
}

/* ---------- 渠道卡 ---------- */

.page-contact .pc-channel-grid {
  margin-top: 32px;
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .pc-channel {
  position: relative;
  padding: 22px 20px 20px;
  border: 1px solid var(--pc-hair-line);
  background: var(--bs-paper);
  box-shadow: var(--bs-shadow-1);
  transition: border-color 160ms var(--bs-ease), box-shadow 160ms var(--bs-ease), background-color 160ms var(--bs-ease);
}

.page-contact .pc-channel::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 2px;
  background: var(--bs-ice);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 160ms var(--bs-ease);
}

.page-contact .pc-channel:hover,
.page-contact .pc-channel:focus-within {
  border-color: rgba(0, 168, 232, 0.42);
  box-shadow: var(--bs-shadow-2);
  background: #FBFDFE;
}

.page-contact .pc-channel:hover::before,
.page-contact .pc-channel:focus-within::before {
  transform: scaleY(1);
}

.page-contact .pc-channel__tag {
  margin: 0 0 10px;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--bs-ice-deep);
}

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

.page-contact .pc-channel__value {
  margin: 0 0 14px;
  font-family: var(--bs-font-mono);
  font-size: 13.5px;
  line-height: 1.6;
  font-weight: 600;
  color: var(--bs-ink);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .pc-channel__use {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.7;
  color: rgba(28, 31, 38, 0.78);
}

.page-contact .pc-channel__sla {
  margin: 0;
  padding-top: 12px;
  border-top: 1px solid var(--pc-hair-line);
  font-size: 13px;
  line-height: 1.65;
  color: rgba(28, 31, 38, 0.62);
}

.page-contact .pc-channel__hint {
  margin: 10px 0 0;
  font-size: 12.5px;
  line-height: 1.6;
  color: rgba(28, 31, 38, 0.5);
  transition: color 160ms var(--bs-ease);
}

.page-contact .pc-channel:hover .pc-channel__hint,
.page-contact .pc-channel:focus-within .pc-channel__hint {
  color: var(--bs-ice-deep);
}

/* ---------- 渠道配图 ---------- */

.page-contact .pc-channel-fig {
  margin: 36px 0 0;
  border: 1px solid var(--pc-hair-line);
  background: linear-gradient(135deg, var(--bs-ice-mist), var(--bs-cloud));
  overflow: hidden;
}

.page-contact .pc-channel-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-contact .pc-channel-fig figcaption {
  padding: 12px 18px;
  border-top: 1px solid var(--pc-hair-line);
  background: var(--bs-paper);
  font-size: 12.5px;
  letter-spacing: 0.04em;
  color: rgba(28, 31, 38, 0.58);
}

/* ---------- 处理流程时间线 ---------- */

.page-contact .pc-flow {
  margin-top: 56px;
  padding-top: 32px;
  border-top: 1px solid var(--pc-hair-line);
}

.page-contact .pc-flow__title {
  margin: 0;
}

.page-contact .pc-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 22px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .pc-timeline__item {
  position: relative;
  padding: 18px 0 0 18px;
  border-top: 2px solid var(--bs-ice-mist);
}

.page-contact .pc-timeline__item::before {
  content: "";
  position: absolute;
  top: -4px;
  left: 0;
  width: 6px;
  height: 6px;
  background: var(--bs-ice);
}

.page-contact .pc-timeline__step {
  display: block;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--bs-ice-deep);
  margin-bottom: 8px;
}

.page-contact .pc-timeline__name {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
}

.page-contact .pc-timeline__text {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(28, 31, 38, 0.72);
}

/* ---------- 旁栏：准备清单 ---------- */

.page-contact .pc-split__side {
  display: grid;
  gap: 24px;
  align-content: start;
}

.page-contact .pc-prep {
  padding: 26px 22px 20px;
  border: 1px solid var(--pc-hair-line);
  background: var(--bs-cloud);
}

.page-contact .pc-prep__title {
  margin: 0 0 10px;
}

.page-contact .pc-prep__lede {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(28, 31, 38, 0.64);
}

.page-contact .pc-prep__list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
}

.page-contact .pc-prep__item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 0;
  border-top: 1px solid var(--pc-hair-line);
  transition: background-color 160ms var(--bs-ease);
}

.page-contact .pc-prep__item:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-contact .pc-prep__box {
  appearance: none;
  -webkit-appearance: none;
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin: 3px 0 0;
  border: 1px solid var(--bs-hair-strong);
  background: var(--bs-paper);
  cursor: pointer;
  position: relative;
  transition: background-color 160ms var(--bs-ease), border-color 160ms var(--bs-ease);
}

.page-contact .pc-prep__box:checked {
  background: var(--bs-lime);
  border-color: var(--bs-lime-deep);
}

.page-contact .pc-prep__box:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border-right: 2px solid var(--bs-ink);
  border-bottom: 2px solid var(--bs-ink);
  transform: rotate(45deg);
}

.page-contact .pc-prep__box:focus-visible {
  outline: 2px solid var(--bs-ice);
  outline-offset: 2px;
}

.page-contact .pc-prep__label {
  display: grid;
  gap: 3px;
  cursor: pointer;
}

.page-contact .pc-prep__name {
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
  transition: color 160ms var(--bs-ease);
}

.page-contact .pc-prep__desc {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(28, 31, 38, 0.6);
}

.page-contact .pc-prep__box:checked ~ .pc-prep__label .pc-prep__name {
  color: rgba(28, 31, 38, 0.42);
}

/* ---------- 旁栏：问题直达 ---------- */

.page-contact .pc-direct {
  padding: 26px 22px 22px;
  border: 1px solid var(--pc-hair-line);
  background: var(--bs-paper);
  box-shadow: var(--bs-shadow-1);
}

.page-contact .pc-direct__title {
  margin: 0 0 10px;
}

.page-contact .pc-direct__lede {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: rgba(28, 31, 38, 0.64);
}

.page-contact .pc-direct__list {
  list-style: none;
  margin: 16px 0 0;
  padding: 0;
}

.page-contact .pc-direct__link {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 10px;
  border-top: 1px solid var(--pc-hair-line);
  color: var(--bs-ink);
  text-decoration: none;
  transition: background-color 160ms var(--bs-ease), box-shadow 160ms var(--bs-ease);
}

.page-contact .pc-direct__list li:first-child .pc-direct__link {
  border-top: 0;
}

.page-contact .pc-direct__link:hover {
  background: var(--bs-ice-mist);
  box-shadow: inset 2px 0 0 var(--bs-ice);
}

.page-contact .pc-direct__link:focus-visible {
  outline: 2px solid var(--bs-ice);
  outline-offset: 2px;
}

.page-contact .pc-direct__label {
  font-size: 14.5px;
  line-height: 1.55;
}

.page-contact .pc-direct__go {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--bs-ice-deep);
  white-space: nowrap;
}

.page-contact .pc-direct__go::after {
  content: " →";
}

/* ---------- 服务范围与备案 ---------- */

.page-contact .pc-scope {
  position: relative;
  margin-top: 80px;
  padding: 72px 0 0;
  background: var(--bs-ink);
  color: var(--bs-paper);
  overflow: hidden;
  isolation: isolate;
}

.page-contact .pc-scope__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.26;
}

.page-contact .pc-scope__inner {
  position: relative;
}

.page-contact .pc-scope__eyebrow {
  margin: 0 0 14px;
  font-size: 12.5px;
  letter-spacing: 0.16em;
  color: var(--bs-ice-light);
}

.page-contact .pc-scope__title {
  margin: 0;
  color: var(--bs-paper);
  max-width: 18em;
}

.page-contact .pc-scope__lede {
  margin: 18px 0 0;
  max-width: 36em;
  font-size: 15.5px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.7);
}

.page-contact .pc-scope__grid {
  margin-top: 40px;
  display: grid;
  gap: 16px;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .pc-scope__card {
  padding: 24px 22px;
  border: 1px solid var(--bs-hair-dark);
  background: rgba(43, 48, 56, 0.62);
  transition: border-color 160ms var(--bs-ease), background-color 160ms var(--bs-ease);
}

.page-contact .pc-scope__card:hover {
  border-color: rgba(0, 168, 232, 0.5);
  background: rgba(43, 48, 56, 0.86);
}

.page-contact .pc-scope__k {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--bs-ice-light);
}

.page-contact .pc-scope__v {
  margin: 0 0 12px;
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.01em;
  color: var(--bs-paper);
}

.page-contact .pc-scope__d {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(255, 255, 255, 0.66);
}

.page-contact .pc-scope__bar {
  margin: 52px 0 0;
  padding: 18px 0 22px;
  border-top: 1px solid var(--bs-hair-dark);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  font-size: 12px;
  letter-spacing: 0.05em;
  color: rgba(255, 255, 255, 0.5);
}

/* ---------- 响应式 ---------- */

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

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

@media (min-width: 760px) {
  .page-contact .pc-timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 26px 30px;
  }
}

@media (min-width: 900px) {
  .page-contact .pc-hero {
    padding: calc(var(--bs-header-h) + 72px) 0 78px;
  }

  .page-contact .pc-hero__grid {
    grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr);
    gap: 56px;
  }
}

@media (min-width: 1040px) {
  .page-contact .pc-main {
    padding-top: 96px;
  }

  .page-contact .pc-split {
    grid-template-columns: minmax(0, 1.62fr) minmax(0, 1fr);
    gap: clamp(40px, 4.5vw, 76px);
    align-items: start;
  }

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

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

  .page-contact .pc-scope {
    margin-top: 104px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-channel,
  .page-contact .pc-channel::before,
  .page-contact .pc-channel__hint,
  .page-contact .pc-prep__item,
  .page-contact .pc-prep__box,
  .page-contact .pc-prep__name,
  .page-contact .pc-direct__link,
  .page-contact .pc-scope__card {
    transition: none;
  }
}
<<<END>>>