.page-contact {
  --pc-rule: rgba(127, 216, 232, .30);
  --pc-gap: clamp(1.5rem, 4vw, 3rem);
  padding: 0 0 clamp(3rem, 8vw, 5.5rem);
}

/* 首屏 */
.page-contact .pc-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(1.5rem, 4vw, 2.5rem);
  padding: clamp(1.5rem, 4vw, 2.75rem) 0 clamp(1.75rem, 4.5vw, 3rem);
  border-bottom: 1px solid var(--pc-rule);
}

.page-contact .pc-hero-copy {
  min-width: 0;
}

.page-contact .pc-hero h1 {
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(2rem, 5.4vw, 3.9rem);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--c-frost);
  margin: .6rem 0 .95rem;
}

.page-contact .pc-hero-lede {
  max-width: 40ch;
  margin: 0 0 1.4rem;
  font-size: clamp(.98rem, 1.6vw, 1.0625rem);
  line-height: 1.8;
  color: var(--c-body);
}

.page-contact .pc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: .65rem;
}

.page-contact .pc-hero-figure {
  margin: 0;
  border: 1px solid var(--pc-rule);
  background: var(--c-night);
  min-width: 0;
}

.page-contact .pc-hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 640;
  object-fit: cover;
  filter: saturate(.85) contrast(1.04);
}

/* 主体两栏 */
.page-contact .pc-body {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(2rem, 5vw, 3.25rem);
  padding-top: clamp(1.75rem, 4vw, 3rem);
}

.page-contact .pc-main {
  min-width: 0;
}

.page-contact .pc-block {
  padding-bottom: clamp(1.75rem, 4vw, 2.5rem);
  margin-bottom: clamp(1.75rem, 4vw, 2.5rem);
  border-bottom: 1px solid var(--line-soft);
}

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

.page-contact .pc-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .2rem .95rem;
  align-items: baseline;
  margin-bottom: 1rem;
}

.page-contact .pc-num {
  font-family: var(--font-num);
  font-size: clamp(1.15rem, 2.6vw, 1.6rem);
  font-weight: 700;
  letter-spacing: .06em;
  line-height: 1;
  color: var(--c-violet);
}

.page-contact .pc-title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.3rem, 2.6vw, 1.7rem);
  line-height: 1.25;
  color: var(--c-frost);
}

.page-contact .pc-lead {
  max-width: 38ch;
  margin: 0 0 .95rem;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--c-frost);
  border-left: 2px solid var(--c-neon);
  padding-left: .95rem;
}

.page-contact .pc-text {
  max-width: 40ch;
  margin: 0 0 .85rem;
  font-size: .9375rem;
  line-height: 1.85;
  color: var(--c-body);
}

.page-contact .pc-text:last-child {
  margin-bottom: 0;
}

/* 四步刻度 */
.page-contact .flow-ruler {
  list-style: none;
  margin: 1.35rem 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-contact .flow-step {
  position: relative;
  background: var(--c-snow-deep);
  padding: 1.1rem 1.05rem 1.25rem;
  border-top: 2px solid transparent;
  transition: border-color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-contact .flow-step:hover,
.page-contact .flow-step:focus-within {
  border-top-color: var(--c-neon);
  background: #14344d;
}

.page-contact .flow-num {
  display: block;
  font-family: var(--font-num);
  font-size: .8125rem;
  letter-spacing: .1em;
  color: var(--c-ice);
  margin-bottom: .6rem;
  transition: color var(--t) var(--ease);
}

.page-contact .flow-step:hover .flow-num,
.page-contact .flow-step:focus-within .flow-num {
  color: var(--c-neon);
}

.page-contact .flow-title {
  margin: 0 0 .45rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.0625rem;
  color: var(--c-frost);
}

.page-contact .flow-text {
  margin: 0 0 .65rem;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--c-body);
}

.page-contact .flow-time {
  margin: 0;
  font-family: var(--font-num);
  font-size: .75rem;
  letter-spacing: .06em;
  color: var(--c-orange);
}

.page-contact .flow-figure {
  margin: 1.25rem 0 0;
  border: 1px solid var(--line-soft);
  background: var(--c-night);
}

.page-contact .flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 900 / 500;
  object-fit: cover;
  filter: saturate(.8);
}

/* 合作折叠 */
.page-contact .collab {
  border: 1px solid var(--line-soft);
  background: rgba(18, 46, 69, .55);
  margin-top: .55rem;
}

.page-contact .collab > summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .9rem 1rem;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: .9375rem;
  color: var(--c-frost);
  transition: color var(--t) var(--ease), background var(--t) var(--ease);
}

.page-contact .collab > summary::-webkit-details-marker {
  display: none;
}

.page-contact .collab > summary::after {
  content: "+";
  font-family: var(--font-num);
  font-size: 1.05rem;
  line-height: 1;
  color: var(--c-neon);
  flex: none;
}

.page-contact .collab[open] > summary::after {
  content: "−";
}

.page-contact .collab > summary:hover,
.page-contact .collab > summary:focus-visible {
  color: var(--c-neon);
  background: rgba(43, 232, 176, .07);
}

.page-contact .collab-body {
  padding: 0 1rem 1.05rem;
  border-top: 1px solid var(--line-soft);
}

.page-contact .collab-body p {
  max-width: 42ch;
  margin: .85rem 0 0;
  font-size: .9rem;
  line-height: 1.8;
  color: var(--c-body);
}

/* 右栏 */
.page-contact .pc-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: clamp(1rem, 2.6vw, 1.5rem);
}

.page-contact .contact-card {
  position: relative;
  border: 1px solid var(--pc-rule);
  background: linear-gradient(158deg, rgba(18, 46, 69, .96), rgba(11, 27, 43, .96));
  padding: clamp(1.15rem, 3vw, 1.6rem);
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 76px;
  height: 3px;
  background: linear-gradient(90deg, var(--c-orange), var(--c-violet));
}

.page-contact .card-kicker {
  margin: 0 0 .95rem;
  font-family: var(--font-num);
  font-size: .75rem;
  font-weight: 700;
  letter-spacing: .14em;
  color: var(--c-neon);
}

.page-contact .card-kicker--alt {
  color: var(--c-orange);
}

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

.page-contact .channel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: .3rem .75rem;
  align-items: center;
  padding: .85rem 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.page-contact .channel:first-child {
  padding-top: 0;
}

.page-contact .channel-name {
  grid-column: 1 / -1;
  font-family: var(--font-num);
  font-size: .6875rem;
  letter-spacing: .12em;
  color: var(--c-grit);
}

.page-contact .channel-value {
  min-width: 0;
  font-size: .9375rem;
  line-height: 1.55;
  color: var(--c-frost);
  overflow-wrap: anywhere;
}

.page-contact .channel-note {
  margin: 1rem 0 0;
  padding-top: .95rem;
  border-top: 1px solid var(--line-soft);
  font-size: .8125rem;
  line-height: 1.75;
  color: var(--c-grit);
}

.page-contact .check-card {
  border: 1px solid var(--pc-rule);
  background: var(--c-snow-deep);
  padding: clamp(1.15rem, 3vw, 1.6rem);
}

.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .75rem;
}

.page-contact .checklist li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .7rem;
  align-items: start;
  padding-bottom: .75rem;
  border-bottom: 1px dashed var(--line-soft);
}

.page-contact .checklist li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.page-contact .check-idx {
  font-family: var(--font-num);
  font-size: .75rem;
  letter-spacing: .08em;
  color: var(--c-ice);
  padding-top: .22rem;
}

.page-contact .check-text {
  font-size: .90625rem;
  line-height: 1.65;
  color: var(--c-body);
}

.page-contact .pc-return {
  border: 1px solid var(--pc-rule);
  border-left: 3px solid var(--c-orange);
  background: rgba(255, 122, 41, .06);
  padding: clamp(1rem, 2.6vw, 1.35rem);
}

.page-contact .pc-return-text {
  margin: 0 0 .85rem;
  font-size: .875rem;
  line-height: 1.7;
  color: var(--c-body);
}

.page-contact .pc-return-btn {
  width: 100%;
}

/* 中小屏 */
@media (min-width: 560px) {
  .page-contact .flow-ruler {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 880px) {
  .page-contact .pc-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    align-items: end;
    gap: clamp(2rem, 5vw, 4rem);
  }
}

@media (min-width: 980px) {
  .page-contact .pc-body {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
    gap: clamp(2.5rem, 5vw, 4.5rem);
    align-items: start;
  }

  .page-contact .pc-aside {
    position: sticky;
    top: calc(var(--header-h-sm) + 1.25rem);
  }
}

@media (min-width: 1200px) {
  .page-contact .pc-lead {
    font-size: 1.0625rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .flow-step,
  .page-contact .flow-num,
  .page-contact .collab > summary {
    transition: none;
  }
}