.page-contact {
  --cc-line: rgba(22, 225, 232, .32);
  --cc-line-soft: rgba(243, 239, 228, .14);
  --cc-panel: rgba(36, 21, 66, .72);
  padding-bottom: clamp(2.5rem, 6vw, 4.5rem);
  max-width: 100%;
}

/* ---------- 首屏 ---------- */
.page-contact .c-hero {
  display: grid;
  gap: 1rem;
  padding: clamp(1.5rem, 5vw, 3.25rem) 0 clamp(1.25rem, 4vw, 2.5rem);
}

.page-contact .c-hero__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 7vw, 3.5rem);
  line-height: 1.14;
  letter-spacing: .01em;
  color: var(--c-paper);
  text-shadow: 0 0 24px rgba(22, 225, 232, .3);
  max-width: 22ch;
}

.page-contact .c-hero__lead {
  margin: 0;
  max-width: 40em;
  font-size: clamp(1rem, 2.4vw, 1.1rem);
  line-height: 1.85;
  color: var(--c-mist);
}

.page-contact .c-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin: .4rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .c-hero__meta li {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .04em;
  color: var(--c-cyan);
  border: 1px solid var(--cc-line);
  border-radius: 999px;
  padding: .3rem .7rem;
  background: rgba(22, 225, 232, .07);
}

/* ---------- 区块通用 ---------- */
.page-contact .c-block {
  padding: clamp(1.75rem, 4.5vw, 3rem) 0;
}

.page-contact .c-block__head {
  display: grid;
  gap: .55rem;
  margin-bottom: clamp(1.25rem, 3vw, 2rem);
}

.page-contact .c-block__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: clamp(1.35rem, 4vw, 2rem);
  line-height: 1.3;
  color: var(--c-paper);
}

.page-contact .c-block__sub {
  margin: 0;
  max-width: 44em;
  font-size: .96rem;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-contact .c-block a {
  color: var(--c-cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(22, 225, 232, .45);
}

.page-contact .c-block a:hover,
.page-contact .c-block a:focus-visible {
  color: var(--c-yellow);
  border-bottom-color: var(--c-yellow);
}

/* ---------- 联系信息牌 + 咨询准备 ---------- */
.page-contact .c-split {
  display: grid;
  gap: 1.25rem;
}

.page-contact .c-panel {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: clamp(1.25rem, 3.5vw, 1.9rem);
  border: 2px solid var(--cc-line);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(36, 21, 66, .94), rgba(14, 16, 48, .97));
}

.page-contact .c-panel__bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .3;
}

.page-contact .c-panel::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(160deg, rgba(14, 16, 48, .7), rgba(36, 21, 66, .93) 62%);
}

.page-contact .c-panel__sticker {
  position: absolute;
  top: clamp(.6rem, 2.5vw, 1rem);
  right: clamp(.6rem, 2.5vw, 1rem);
  transform: rotate(4deg);
  font-family: var(--font-mono);
  font-size: .68rem;
  letter-spacing: .06em;
  padding: .28rem .58rem;
  border: 1px solid rgba(255, 122, 41, .7);
  border-radius: 999px;
  color: var(--c-orange);
  background: rgba(255, 122, 41, .1);
  pointer-events: none;
}

.page-contact .c-panel__caption {
  margin: 0;
  padding-right: 8rem;
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .1em;
  color: var(--c-cyan);
}

.page-contact .c-rows {
  display: grid;
  margin: clamp(.9rem, 2.5vw, 1.3rem) 0 0;
}

.page-contact .c-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: .3rem .6rem;
  padding: .9rem 0;
  border-top: 1px dashed var(--cc-line-soft);
}

.page-contact .c-row__label {
  grid-column: 1 / -1;
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .12em;
  color: var(--c-mist);
}

.page-contact .c-row__value {
  min-width: 0;
  font-size: .97rem;
  line-height: 1.65;
  color: var(--c-paper);
  overflow-wrap: anywhere;
}

.page-contact .c-row__value--mono {
  font-family: var(--font-mono);
  font-size: clamp(.82rem, 3vw, .95rem);
  letter-spacing: .01em;
  color: var(--c-yellow);
}

.page-contact .c-prep {
  display: grid;
  align-content: start;
  gap: .8rem;
  padding: clamp(1.25rem, 3.5vw, 1.9rem);
  border: 1px solid var(--cc-line-soft);
  border-left: 3px solid var(--c-orange);
  border-radius: var(--radius);
  background: rgba(243, 239, 228, .04);
}

.page-contact .c-prep__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(1.05rem, 3vw, 1.3rem);
  line-height: 1.45;
  color: var(--c-paper);
}

.page-contact .c-prep__list {
  display: grid;
  gap: .85rem;
  margin: .25rem 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .c-prep__item {
  position: relative;
  padding-left: 1.5rem;
  font-size: .94rem;
  line-height: 1.8;
  color: var(--c-mist);
}

.page-contact .c-prep__item::before {
  content: "";
  position: absolute;
  left: .15rem;
  top: .68em;
  width: .5rem;
  height: .5rem;
  background: var(--c-cyan);
  transform: rotate(45deg);
}

.page-contact .c-prep__item strong {
  color: var(--c-paper);
  font-weight: 700;
}

.page-contact .c-prep__note {
  margin: .5rem 0 0;
  padding-top: .8rem;
  border-top: 1px dashed var(--cc-line-soft);
  font-size: .88rem;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 合作方向 ---------- */
.page-contact .c-collab {
  display: grid;
  gap: 1rem;
}

.page-contact .c-collab__card {
  display: grid;
  align-content: start;
  gap: .6rem;
  padding: clamp(1.1rem, 3vw, 1.6rem);
  border: 1px solid var(--cc-line-soft);
  border-top: 3px solid var(--c-cyan);
  border-radius: var(--radius);
  background: var(--cc-panel);
}

.page-contact .c-collab__card:nth-child(2) {
  border-top-color: var(--c-orange);
}

.page-contact .c-collab__card:nth-child(3) {
  border-top-color: var(--c-yellow);
}

.page-contact .c-collab__no {
  font-family: var(--font-mono);
  font-size: .7rem;
  letter-spacing: .14em;
  color: var(--c-mist);
}

.page-contact .c-collab__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1.1rem;
  line-height: 1.45;
  color: var(--c-paper);
}

.page-contact .c-collab__text {
  margin: 0;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-contact .c-collab__foot {
  margin: 1.5rem 0 0;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--c-mist);
}

/* ---------- 台阶式流程 ---------- */
.page-contact .c-stairs {
  display: grid;
  gap: .75rem;
}

.page-contact .c-step {
  border: 1px solid var(--cc-line);
  border-radius: var(--radius);
  background: var(--cc-panel);
  padding: .95rem 1.05rem;
}

.page-contact .c-step[open] {
  border-color: var(--c-orange);
  background: rgba(36, 21, 66, .88);
}

.page-contact .c-step__head {
  display: flex;
  align-items: center;
  gap: .65rem;
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 1rem;
  color: var(--c-paper);
}

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

.page-contact .c-step__num {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .04em;
  color: var(--c-ink);
  background: var(--c-cyan);
  border-radius: 6px;
  padding: .16rem .42rem;
}

.page-contact .c-step__body {
  margin-top: .8rem;
  font-size: .9rem;
  line-height: 1.85;
  color: var(--c-mist);
}

.page-contact .c-step__body p {
  margin: 0;
}

.page-contact .c-step__body ul {
  margin: .6rem 0 0;
  padding-left: 1.15rem;
}

.page-contact .c-step__body li {
  margin-bottom: .28rem;
}

.page-contact .c-flow-figure {
  margin: clamp(1.5rem, 4vw, 2.25rem) 0 0;
  border: 1px solid var(--cc-line-soft);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(14, 16, 48, .7);
}

.page-contact .c-flow-figure img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  aspect-ratio: 11 / 6;
  object-fit: cover;
}

.page-contact .c-flow-figure figcaption {
  font-family: var(--font-mono);
  font-size: .72rem;
  letter-spacing: .06em;
  color: var(--c-mist);
  padding: .6rem .9rem;
  border-top: 1px dashed var(--cc-line-soft);
}

/* ---------- 常见问题 ---------- */
.page-contact .c-faq {
  display: grid;
  gap: .6rem;
}

.page-contact .c-faq .disclosure {
  border: 1px solid var(--cc-line-soft);
  border-radius: var(--radius);
  background: rgba(243, 239, 228, .035);
  padding: .85rem 1.05rem;
  transition: border-color .25s var(--ease);
}

.page-contact .c-faq .disclosure:hover,
.page-contact .c-faq .disclosure[open] {
  border-color: var(--cc-line);
}

.page-contact .c-faq summary {
  cursor: pointer;
  list-style: none;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: .98rem;
  line-height: 1.6;
  color: var(--c-paper);
}

.page-contact .c-faq summary::-webkit-details-marker {
  display: none;
}

.page-contact .c-faq summary::before {
  content: "+";
  font-family: var(--font-mono);
  color: var(--c-cyan);
  margin-right: .55rem;
}

.page-contact .c-faq details[open] summary::before {
  content: "−";
  color: var(--c-orange);
}

.page-contact .c-faq p {
  margin: .7rem 0 0;
  font-size: .91rem;
  line-height: 1.85;
  color: var(--c-mist);
}

/* ---------- 备案窄条 ---------- */
.page-contact .c-meta {
  margin-top: clamp(2rem, 5vw, 3.25rem);
  padding-top: clamp(1.1rem, 3vw, 1.6rem);
  border-top: 2px solid rgba(243, 239, 228, .28);
}

.page-contact .c-meta__title {
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-weight: 500;
  font-size: .74rem;
  letter-spacing: .16em;
  color: var(--c-mist);
}

.page-contact .c-meta__strip {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  padding: .7rem .8rem;
  border: 1px dashed var(--cc-line-soft);
  border-radius: 8px;
}

.page-contact .c-meta__item {
  font-family: var(--font-mono);
  font-size: .74rem;
  letter-spacing: .02em;
  color: var(--c-mist);
  border: 1px solid var(--cc-line-soft);
  border-radius: 6px;
  padding: .26rem .6rem;
  overflow-wrap: anywhere;
}

.page-contact .c-meta__item--strong {
  color: var(--c-cyan);
  border-color: var(--cc-line);
  background: rgba(22, 225, 232, .07);
}

/* ---------- 断点 ---------- */
@media (min-width: 780px) {
  .page-contact .c-collab {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1.25rem;
    padding-bottom: 1.4rem;
  }

  .page-contact .c-collab__card:nth-child(2) {
    transform: translateY(1.2rem);
  }
}

@media (min-width: 880px) {
  .page-contact .c-stairs {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    align-items: end;
    gap: 1rem;
  }

  .page-contact .c-step:nth-child(1) { margin-bottom: .5rem; }
  .page-contact .c-step:nth-child(2) { margin-bottom: 2.9rem; }
  .page-contact .c-step:nth-child(3) { margin-bottom: 5.3rem; }
  .page-contact .c-step:nth-child(4) { margin-bottom: 7.7rem; }
}

@media (min-width: 920px) {
  .page-contact .c-split {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
    gap: 1.75rem;
    align-items: start;
  }
}

@media (max-width: 479px) {
  .page-contact .c-panel__caption {
    padding-right: 0;
  }

  .page-contact .c-panel__sticker {
    position: static;
    display: inline-block;
    transform: none;
    margin-bottom: .6rem;
  }

  .page-contact .c-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-contact .c-row .copy-chip {
    justify-self: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .disclosure,
  .page-contact .c-collab__card {
    transition: none;
  }
}