.page-contact {
  --pc-paper-ink: #0B1730;
  --pc-paper-muted: #4E5F80;
  --pc-stack-gap: clamp(30px, 4.5vw, 56px);
}

/* ============ 首屏 ============ */
.page-contact .pc-hero {
  padding-bottom: clamp(30px, 5vw, 58px);
}

.page-contact .pc-hero__box {
  display: grid;
  gap: 14px;
  max-width: 42em;
  padding-top: clamp(18px, 3vw, 34px);
}

.page-contact .pc-hero__eyebrow {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--c-cyan);
}

.page-contact .pc-hero__title {
  margin: 0;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(1.9rem, 5.2vw, 3.3rem);
  line-height: 1.14;
  letter-spacing: -.02em;
  color: var(--ink);
}

.page-contact .pc-hero__lead {
  margin: 0;
  max-width: 36em;
  color: var(--dim);
  font-size: clamp(.94rem, 1.35vw, 1.05rem);
  line-height: 1.85;
}

.page-contact .pc-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 8px;
}

/* ============ 主体两栏 ============ */
.page-contact .pc-body {
  padding-bottom: clamp(44px, 7vw, 96px);
}

.page-contact .pc-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
  align-items: start;
}

.page-contact .pc-main {
  display: grid;
  gap: var(--pc-stack-gap);
  min-width: 0;
}

/* ============ 左侧纸张信息卡 ============ */
.page-contact .pc-info__card {
  position: relative;
  border-radius: var(--r-lg);
  background: var(--c-paper);
  color: var(--pc-paper-ink);
  padding: clamp(20px, 3vw, 30px);
  box-shadow:
    0 0 0 1px rgba(11, 23, 48, .14),
    7px 7px 0 0 rgba(61, 240, 208, .16),
    0 22px 48px rgba(3, 8, 20, .55);
}

.page-contact .pc-info__flag {
  display: inline-block;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--pc-paper-ink);
  color: var(--c-cyan);
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .14em;
}

.page-contact .pc-info__title {
  margin: 14px 0 8px;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(1.25rem, 2.2vw, 1.5rem);
  letter-spacing: -.01em;
  color: var(--pc-paper-ink);
}

.page-contact .pc-info__intro {
  margin: 0 0 18px;
  font-size: .875rem;
  line-height: 1.75;
  color: var(--pc-paper-muted);
}

.page-contact .pc-info__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}

.page-contact .pc-info__item {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 3px 10px;
  padding-bottom: 16px;
  border-bottom: 1px dashed rgba(11, 23, 48, .2);
}

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

.page-contact .pc-info__icon {
  grid-row: span 3;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  color: var(--c-orange);
}

.page-contact .pc-info__label {
  font-family: var(--f-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: #6B7C9C;
}

.page-contact .pc-info__val {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.5;
  color: var(--pc-paper-ink);
  overflow-wrap: anywhere;
}

.page-contact .pc-info__hint {
  font-size: .8rem;
  line-height: 1.7;
  color: var(--pc-paper-muted);
}

.page-contact .pc-info__note {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid rgba(11, 23, 48, .16);
  font-size: .78rem;
  line-height: 1.75;
  color: var(--pc-paper-muted);
}

/* ============ 区块通用 ============ */
.page-contact .pc-block {
  min-width: 0;
}

.page-contact .pc-block__title {
  position: relative;
  margin: 0 0 10px;
  padding-left: 18px;
  font-family: var(--f-head);
  font-weight: 900;
  font-size: clamp(1.3rem, 2.4vw, 1.8rem);
  letter-spacing: -.01em;
  color: var(--ink);
}

.page-contact .pc-block__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: .34em;
  width: 4px;
  height: 1em;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--c-cyan), rgba(61, 240, 208, 0));
}

.page-contact .pc-block__sub {
  margin: 0 0 22px;
  max-width: 38em;
  color: var(--dim);
  font-size: .92rem;
  line-height: 1.85;
}

/* ============ 问题类型切换 ============ */
.page-contact .pc-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.page-contact .pc-radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .pc-tab {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border-radius: 999px;
  border: 1px solid var(--edge);
  background: var(--c-panel);
  color: var(--dim);
  font-size: .84rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .pc-tab:hover {
  border-color: var(--c-cyan);
  color: var(--ink);
}

.page-contact .pc-radio:checked + .pc-tab {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-void);
}

.page-contact .pc-radio:focus-visible + .pc-tab {
  outline: 2px solid var(--c-lime);
  outline-offset: 3px;
}

.page-contact .pc-panel {
  display: none;
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  background: linear-gradient(160deg, rgba(19, 31, 58, .95), rgba(11, 23, 48, .72));
  padding: clamp(18px, 2.6vw, 26px);
}

.page-contact .pc-picker:has(#pc-q-data:checked) .pc-panel[data-q="data"],
.page-contact .pc-picker:has(#pc-q-sub:checked) .pc-panel[data-q="sub"],
.page-contact .pc-picker:has(#pc-q-coop:checked) .pc-panel[data-q="coop"] {
  display: block;
}

@supports not selector(:has(*)) {
  .page-contact .pc-panel {
    display: block;
    margin-bottom: 12px;
  }
}

.page-contact .pc-panel__title {
  margin: 12px 0 14px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: clamp(1.02rem, 1.7vw, 1.22rem);
  line-height: 1.5;
  color: var(--ink);
}

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

.page-contact .pc-need li {
  position: relative;
  padding-left: 22px;
  color: var(--dim);
  font-size: .89rem;
  line-height: 1.8;
}

.page-contact .pc-need li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: .68em;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--c-cyan);
  transform: rotate(45deg);
}

/* ============ 配图 ============ */
.page-contact .pc-figure {
  margin: clamp(22px, 3vw, 34px) 0 0;
  border: 1px solid var(--edge);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-panel);
}

.page-contact .pc-figure img,
.page-contact .pc-skyline img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}

.page-contact .pc-figure img {
  aspect-ratio: 14 / 9;
}

.page-contact .pc-figure figcaption,
.page-contact .pc-skyline figcaption {
  padding: 12px 16px;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--dim);
  border-top: 1px solid var(--edge);
}

/* ============ 处理节奏 ============ */
.page-contact .pc-flow {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .pc-flow__item {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  background: var(--c-arena);
  transition: border-color .18s var(--ease);
}

.page-contact .pc-flow__item:hover {
  border-color: var(--c-cyan);
}

.page-contact .pc-flow__num {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--c-lime);
  line-height: 1.4;
}

.page-contact .pc-flow__body strong {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
  font-size: .98rem;
}

.page-contact .pc-flow__body p {
  margin: 0;
  color: var(--dim);
  font-size: .87rem;
  line-height: 1.8;
}

/* ============ 自查三步 ============ */
.page-contact .pc-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

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

.page-contact .pc-step__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .pc-step__label {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 14px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  background: var(--c-arena);
  cursor: pointer;
  transition: border-color .18s var(--ease), background-color .18s var(--ease);
}

.page-contact .pc-step__label:hover {
  border-color: var(--c-cyan);
}

.page-contact .pc-step__input:focus-visible + .pc-step__label {
  outline: 2px solid var(--c-lime);
  outline-offset: 3px;
}

.page-contact .pc-step__input:checked + .pc-step__label {
  border-color: var(--c-cyan);
  background: rgba(61, 240, 208, .08);
}

.page-contact .pc-step__num {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 1rem;
  color: var(--c-lime);
  line-height: 1.5;
}

.page-contact .pc-step__input:checked + .pc-step__label .pc-step__num {
  color: var(--c-cyan);
}

.page-contact .pc-step__body {
  display: grid;
  gap: 4px;
}

.page-contact .pc-step__body strong {
  color: var(--ink);
  font-size: .98rem;
  line-height: 1.5;
}

.page-contact .pc-step__body span {
  color: var(--dim);
  font-size: .86rem;
  line-height: 1.75;
}

/* ============ 合作 ============ */
.page-contact .pc-coop__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-bottom: 24px;
}

.page-contact .pc-coop__stat {
  display: grid;
  gap: 4px;
  padding: 16px 18px;
  border: 1px solid var(--edge);
  border-left: 3px solid var(--c-orange);
  border-radius: var(--r-md);
  background: var(--c-panel);
}

.page-contact .pc-coop__stat .stat {
  font-family: var(--f-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  color: var(--c-lime);
  line-height: 1.1;
}

.page-contact .pc-coop__stat .stat-label {
  color: var(--dim);
  font-size: .84rem;
  line-height: 1.7;
}

.page-contact .pc-coop__cols {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-contact .pc-coop__col {
  padding: 18px 20px;
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  background: rgba(11, 23, 48, .72);
}

.page-contact .pc-coop__col h3 {
  margin: 0 0 12px;
  font-family: var(--f-head);
  font-weight: 800;
  font-size: 1rem;
  color: var(--c-cyan);
}

.page-contact .pc-coop__col ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .pc-coop__col li {
  position: relative;
  padding-left: 18px;
  color: var(--dim);
  font-size: .87rem;
  line-height: 1.75;
}

.page-contact .pc-coop__col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--c-orange);
}

.page-contact .pc-coop__foot {
  margin: 20px 0 0;
  font-size: .85rem;
  line-height: 1.85;
  color: var(--dim);
}

.page-contact .pc-coop__foot a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(61, 240, 208, .45);
  transition: border-color .18s var(--ease), color .18s var(--ease);
}

.page-contact .pc-coop__foot a:hover {
  color: var(--c-lime);
  border-bottom-color: var(--c-lime);
}

/* ============ 底部氛围图 ============ */
.page-contact .pc-skyline {
  margin: 0;
  border: 1px solid var(--edge);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--c-panel);
}

.page-contact .pc-skyline img {
  aspect-ratio: 16 / 9;
}

/* ============ 相关页面 ============ */
.page-contact .pc-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
}

.page-contact .pc-links a {
  display: grid;
  gap: 3px;
  padding: 14px 16px;
  border: 1px solid var(--edge);
  border-radius: var(--r-md);
  background: var(--c-arena);
  text-decoration: none;
  transition: border-color .18s var(--ease), background-color .18s var(--ease), transform .18s var(--ease);
}

.page-contact .pc-links a:hover {
  border-color: var(--c-cyan);
  background: var(--c-panel);
  transform: translateX(3px);
}

.page-contact .pc-links__name {
  color: var(--ink);
  font-weight: 700;
  font-size: .94rem;
}

.page-contact .pc-links__desc {
  color: var(--dim);
  font-size: .8rem;
  line-height: 1.65;
}

/* ============ 响应式 ============ */
@media (min-width: 700px) {
  .page-contact .pc-links {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-contact .pc-grid {
    grid-template-columns: minmax(280px, 340px) minmax(0, 1fr);
    gap: clamp(32px, 4.5vw, 64px);
  }

  .page-contact .pc-info__card {
    position: sticky;
    top: calc(var(--topbar-h) + 20px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .pc-tab,
  .page-contact .pc-flow__item,
  .page-contact .pc-step__label,
  .page-contact .pc-links a,
  .page-contact .pc-coop__foot a {
    transition: none;
  }

  .page-contact .pc-links a:hover {
    transform: none;
  }
}