.page-contact {
  --fb-ink-soft: rgba(14, 27, 42, .74);
  --fb-ink-faint: rgba(14, 27, 42, .48);
  --fb-paper-soft: rgba(244, 239, 230, .76);
  --fb-gap: clamp(16px, 2.6vw, 34px);
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
}

.page-contact .mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.page-contact a {
  color: var(--red-deep);
  text-decoration: none;
  border-bottom: 1px solid rgba(216, 38, 44, .32);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-contact a:hover {
  border-color: var(--red);
  color: var(--red);
}

.page-contact h2 {
  font-family: var(--font-head);
  margin: 0 0 12px;
}

.page-contact .fb-section-head {
  max-width: 62ch;
  margin-bottom: clamp(18px, 2.6vw, 30px);
}

.page-contact .fb-section-head p:not(.eyebrow) {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--fb-ink-soft);
}

/* ---------- 首屏框景 ---------- */
.page-contact .fb-hero {
  padding-block: clamp(18px, 3vw, 36px) clamp(26px, 4.4vw, 56px);
}

.page-contact .fb-hero__frame {
  position: relative;
  margin-top: clamp(14px, 2vw, 24px);
  padding: clamp(24px, 4vw, 56px) clamp(18px, 3.6vw, 54px) clamp(24px, 4vw, 52px);
  border: 1px solid var(--ink);
  background: var(--paper-lite);
  overflow: hidden;
}

.page-contact .fb-hero__frame::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 10px;
  background-image: repeating-linear-gradient(90deg, var(--ink) 0 1px, transparent 1px 16px);
  opacity: .42;
}

.page-contact .fb-hero__frame::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 6px;
  height: 100%;
  background: linear-gradient(180deg, var(--red) 0 34%, var(--gold) 34% 67%, var(--cyan) 67% 100%);
}

.page-contact .fb-hero h1 {
  font-family: var(--font-head);
  font-size: clamp(34px, 6.6vw, 68px);
  line-height: 1.02;
  letter-spacing: -.01em;
  margin: 10px 0 16px;
}

.page-contact .fb-hero__lead {
  max-width: 60ch;
  margin: 0;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.78;
  color: var(--fb-ink-soft);
}

.page-contact .fb-hero__stats {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .fb-hero__stats li {
  background: var(--paper-lite);
  padding: 14px 16px;
  display: grid;
  gap: 5px;
  align-content: start;
}

.page-contact .fb-hero__stats .mono {
  font-size: clamp(16px, 2.1vw, 24px);
  color: var(--red);
  letter-spacing: .02em;
  line-height: 1.1;
  overflow-wrap: anywhere;
}

.page-contact .fb-stat__k {
  font-size: 13px;
  line-height: 1.5;
  color: var(--fb-ink-soft);
}

/* ---------- 清单与筛选 ---------- */
.page-contact .fb-checklist {
  background: var(--paper);
}

.page-contact .fb-checklist__grid {
  display: grid;
  gap: var(--fb-gap);
}

.page-contact .fb-checklist__intro p {
  font-size: 15px;
  line-height: 1.78;
  color: var(--fb-ink-soft);
  margin: 0 0 18px;
}

.page-contact .fb-checklist__intro figure {
  margin: 0;
}

.page-contact .fb-checklist__panel {
  background: var(--paper-lite);
  border-top: 3px solid var(--ink);
  padding: clamp(16px, 2.4vw, 26px);
}

.page-contact .filter__radio {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  clip-path: inset(50%);
  pointer-events: none;
}

.page-contact .filter__bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.page-contact .filter__btn {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 7px 11px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease), border-color .18s var(--ease);
}

.page-contact .filter__btn .mono {
  font-size: 12px;
  color: var(--fb-ink-faint);
}

.page-contact #f-all:checked ~ .filter__bar label[for="f-all"],
.page-contact #f-synced:checked ~ .filter__bar label[for="f-synced"],
.page-contact #f-syncing:checked ~ .filter__bar label[for="f-syncing"],
.page-contact #f-planned:checked ~ .filter__bar label[for="f-planned"] {
  background: var(--ink);
  border-color: var(--ink);
  color: var(--paper-lite);
}

.page-contact #f-all:checked ~ .filter__bar label[for="f-all"] .mono,
.page-contact #f-synced:checked ~ .filter__bar label[for="f-synced"] .mono,
.page-contact #f-syncing:checked ~ .filter__bar label[for="f-syncing"] .mono,
.page-contact #f-planned:checked ~ .filter__bar label[for="f-planned"] .mono {
  color: var(--gold);
}

.page-contact #f-synced:checked ~ .cl-list .cl-item:not(.is-synced),
.page-contact #f-syncing:checked ~ .cl-list .cl-item:not(.is-syncing),
.page-contact #f-planned:checked ~ .cl-list .cl-item:not(.is-planned) {
  display: none;
}

.page-contact .cl-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .cl-item {
  display: grid;
  grid-template-columns: 22px minmax(0, 1fr) auto;
  gap: 8px 12px;
  align-items: start;
  padding: 14px 8px 14px 4px;
  border-bottom: 1px solid var(--line-soft);
  transition: background .2s var(--ease);
}

.page-contact .cl-item:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-contact .cl-item:has(.cl-item__box:checked) {
  background: linear-gradient(90deg, rgba(139, 92, 246, .12), rgba(44, 230, 212, .06));
}

.page-contact .cl-item__box {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  margin: 2px 0 0;
  border: 1px solid var(--ink);
  background: var(--paper-lite);
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease), box-shadow .18s var(--ease);
}

.page-contact .cl-item__box:checked {
  background: var(--violet);
  border-color: var(--violet);
  box-shadow: 0 0 0 3px rgba(139, 92, 246, .22);
}

.page-contact .cl-item__body {
  display: grid;
  gap: 4px;
  cursor: pointer;
}

.page-contact .cl-item__title {
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 700;
  line-height: 1.3;
}

.page-contact .cl-item__desc {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--fb-ink-soft);
}

.page-contact .cl-item__box:checked + .cl-item__body .cl-item__title {
  color: var(--red-deep);
}

.page-contact .cl-item .tag {
  white-space: nowrap;
  align-self: start;
}

.page-contact .lamp {
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: currentColor;
  box-shadow: 0 0 6px currentColor;
  margin-right: 6px;
  vertical-align: middle;
}

/* ---------- 提交节奏 ---------- */
.page-contact .fb-flow {
  background: var(--paper);
}

.page-contact .flow-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 2px solid var(--ink);
}

.page-contact .flow-step {
  position: relative;
  background: var(--paper);
  padding: 22px 18px 26px;
}

.page-contact .flow-step::before {
  content: "";
  position: absolute;
  top: 0;
  left: 18px;
  width: 26px;
  height: 3px;
}

.page-contact .flow-step:nth-child(1)::before { background: var(--red); }
.page-contact .flow-step:nth-child(2)::before { background: var(--gold); }
.page-contact .flow-step:nth-child(3)::before { background: var(--cyan); }
.page-contact .flow-step:nth-child(4)::before { background: var(--violet); }

.page-contact .flow-step__idx {
  display: block;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--fb-ink-faint);
  margin-top: 8px;
}

.page-contact .flow-step h3 {
  font-family: var(--font-head);
  font-size: 19px;
  margin: 10px 0 8px;
}

.page-contact .flow-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.78;
  color: var(--fb-ink-soft);
}

/* ---------- 客服通道 ---------- */
.page-contact .fb-service__panel {
  background: var(--night);
  color: var(--paper);
  padding: clamp(22px, 3.6vw, 50px);
  display: grid;
  gap: clamp(20px, 3vw, 44px);
  border-top: 3px solid var(--gold);
}

.page-contact .fb-service__panel h2 {
  color: var(--paper-lite);
  font-size: clamp(26px, 3.6vw, 40px);
}

.page-contact .fb-service__panel .eyebrow {
  color: var(--gold);
}

.page-contact .fb-service__text {
  margin: 0;
  max-width: 54ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--fb-paper-soft);
}

.page-contact .fb-service__media {
  margin: 0;
}

.page-contact .contact-lines {
  list-style: none;
  margin: 20px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .contact-line {
  display: grid;
  gap: 4px;
  padding: 13px 16px;
  border: 1px solid var(--line-invert);
  background: rgba(244, 239, 230, .04);
}

.page-contact .contact-line__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-contact .contact-line__v {
  font-family: var(--font-mono);
  font-size: clamp(14px, 1.9vw, 19px);
  color: var(--paper-lite);
  overflow-wrap: anywhere;
}

.page-contact .fb-service__panel .dash-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 20px;
  padding: 14px 16px;
  border: 1px solid var(--line-invert);
  background: rgba(44, 230, 212, .07);
  color: var(--paper-lite);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  text-align: left;
  cursor: pointer;
  transition: background .2s var(--ease), border-color .2s var(--ease);
}

.page-contact .fb-service__panel .dash-toggle:hover {
  border-color: var(--cyan);
  background: rgba(44, 230, 212, .14);
}

.page-contact .dash-toggle__left {
  display: grid;
  gap: 4px;
}

.page-contact .dash-toggle__hint {
  display: block;
  font-size: 11px;
  letter-spacing: .05em;
  color: rgba(244, 239, 230, .6);
}

.page-contact .dash-toggle__sign {
  font-size: 20px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact #dash-contact {
  display: grid;
  max-height: none;
  overflow: visible;
  visibility: visible;
  opacity: 1;
  margin-top: 12px;
  border: 1px solid var(--line-invert);
  background: var(--line-invert);
  transition: border-color .2s var(--ease);
}

.page-contact #dash-contact[data-open] {
  border-color: var(--cyan);
}

.page-contact .dash-grid {
  display: grid;
  gap: 1px;
  background: var(--line-invert);
}

.page-contact .dash-cell {
  background: var(--night);
  padding: 14px 16px;
  display: grid;
  gap: 5px;
  align-content: start;
}

.page-contact .dash-cell__k {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  color: var(--gold);
}

.page-contact .dash-cell__v {
  font-size: 14px;
  line-height: 1.65;
  color: var(--paper);
  overflow-wrap: anywhere;
}

/* ---------- 地址与备案 ---------- */
.page-contact .fb-legal__grid {
  display: grid;
  gap: var(--fb-gap);
}

.page-contact .legal-card {
  border-top: 2px solid var(--ink);
  padding-top: 16px;
}

.page-contact .legal-card h2 {
  font-size: clamp(20px, 2.6vw, 26px);
}

.page-contact .legal-card p {
  margin: 0 0 10px;
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .legal-card .mono {
  font-size: 15px;
  color: var(--ink);
  letter-spacing: .04em;
}

.page-contact .fb-legal__links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .fb-hero__stats {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-contact .dash-cell--wide {
    grid-column: 1 / -1;
  }
}

@media (min-width: 760px) {
  .page-contact .flow-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 960px) {
  .page-contact .fb-checklist__grid {
    grid-template-columns: minmax(0, .84fr) minmax(0, 1.16fr);
    align-items: start;
  }

  .page-contact .fb-service__panel {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    align-items: center;
  }

  .page-contact .fb-service__media {
    align-self: stretch;
  }
}

@media (min-width: 1080px) {
  .page-contact .flow-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact * {
    transition-duration: .01ms !important;
  }
}