.page-contact {
  --pc-card-shadow: 8px 8px 0 var(--cyan-deep);
  --pc-hair: rgba(61, 245, 208, 0.22);
  --pc-step-line: rgba(245, 179, 60, 0.55);
  --pc-ink-soft: rgba(247, 251, 248, 0.82);
  --pc-ink-dim: rgba(5, 20, 15, 0.68);
  background: var(--ink-deep);
  color: var(--white);
  overflow-x: hidden;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding: 0;
}

.page-contact .contact-hero-band {
  position: relative;
  height: clamp(150px, 26vw, 290px);
  overflow: hidden;
  border-bottom: 2px solid var(--line-cyan);
}

.page-contact .contact-hero-band img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 62%;
  filter: saturate(0.85) brightness(0.7);
}

.page-contact .contact-hero-band::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(5, 20, 15, 0.18) 0%, rgba(5, 20, 15, 0.55) 58%, rgba(5, 20, 15, 0.96) 100%);
  pointer-events: none;
}

.page-contact .contact-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 46px);
  padding-block: clamp(28px, 4.5vw, 56px) clamp(46px, 6vw, 88px);
}

.page-contact .contact-hero-copy h1 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.95rem, 5.4vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.012em;
  margin: 14px 0 18px;
}

.page-contact .breadcrumb {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  color: var(--mist);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.page-contact .breadcrumb a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-contact .breadcrumb a:hover,
.page-contact .breadcrumb a:focus-visible {
  border-bottom-color: var(--cyan);
}

.page-contact .contact-lede {
  max-width: 48ch;
  font-size: 1.02rem;
  line-height: 1.8;
  color: var(--pc-ink-soft);
  margin: 0 0 26px;
}

.page-contact .contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.page-contact .contact-hero-note {
  margin: 20px 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--amber);
  font-size: 0.88rem;
  line-height: 1.7;
  color: var(--mist);
  max-width: 44ch;
}

/* ---------- 联系信息卡 ---------- */
.page-contact .contact-card {
  background: var(--paper);
  color: var(--ink-deep);
  border: 2px solid var(--ink-deep);
  box-shadow: var(--pc-card-shadow);
  padding: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-contact .contact-card-eyebrow {
  color: var(--pc-ink-dim);
  border-color: rgba(5, 20, 15, 0.28);
  margin: 0;
}

.page-contact .contact-line {
  display: grid;
  gap: 6px;
  padding-top: 16px;
  border-top: 1px solid var(--paper-dim);
}

.page-contact .contact-line-label {
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--pc-ink-dim);
}

.page-contact .contact-value {
  font-family: var(--font-mono);
  font-size: clamp(1rem, 2.6vw, 1.32rem);
  line-height: 1.4;
  color: var(--ink-deep);
  text-decoration: none;
  word-break: break-all;
  border-bottom: 2px solid var(--cyan-deep);
  justify-self: start;
  padding-bottom: 2px;
}

.page-contact .contact-value--text {
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  border-bottom: 0;
  padding-bottom: 0;
  word-break: normal;
}

.page-contact .contact-value:hover,
.page-contact .contact-value:focus-visible {
  background: rgba(61, 245, 208, 0.28);
}

.page-contact .contact-card-foot {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--paper-dim);
  font-size: 0.84rem;
  line-height: 1.7;
  color: var(--pc-ink-dim);
}

/* ---------- 合作方向 ---------- */
.page-contact .contact-collab {
  background-image:
    linear-gradient(rgba(61, 245, 208, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 245, 208, 0.05) 1px, transparent 1px);
  background-size: 72px 72px;
  border-top: 2px solid var(--pc-hair);
}

.page-contact .collab-intro,
.page-contact .process-intro,
.page-contact .prep-lede,
.page-contact .more-intro {
  max-width: 62ch;
  line-height: 1.8;
  color: var(--pc-ink-soft);
  margin: 12px 0 0;
}

.page-contact .collab-head h2,
.page-contact .process-head h2,
.page-contact .prep-head h2,
.page-contact .more-head h2,
.page-contact .contact-close h2 {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(1.6rem, 3.8vw, 2.6rem);
  line-height: 1.14;
  margin: 10px 0 0;
  letter-spacing: -0.01em;
}

.page-contact .collab-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  margin-top: clamp(30px, 4.5vw, 52px);
}

.page-contact .collab-item {
  position: relative;
  background: var(--grass);
  border: 2px solid var(--pc-hair);
  box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.5);
  padding: clamp(20px, 2.6vw, 28px);
  transition: transform var(--t-mid) ease, border-color var(--t-mid) ease, box-shadow var(--t-mid) ease;
}

.page-contact .collab-item:hover {
  border-color: var(--cyan);
  transform: translate(-2px, -2px);
  box-shadow: 8px 8px 0 rgba(0, 0, 0, 0.55);
}

.page-contact .collab-num {
  display: inline-block;
  font-size: 1.5rem;
  line-height: 1;
  color: var(--amber);
  letter-spacing: 0.06em;
}

.page-contact .collab-title {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.18rem;
  line-height: 1.35;
  margin: 12px 0 10px;
  color: var(--white);
}

.page-contact .collab-desc {
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.8;
  color: var(--pc-ink-soft);
}

.page-contact .collab-audience {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--pc-hair);
  font-size: 0.8rem;
  letter-spacing: 0.05em;
  color: var(--cyan);
}

@media (hover: hover) {
  .page-contact .collab-audience {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    margin-top: 0;
    padding-top: 0;
    border-top-color: transparent;
    transition: max-height var(--t-slow) ease, opacity var(--t-mid) ease, margin-top var(--t-slow) ease, padding-top var(--t-slow) ease;
  }

  .page-contact .collab-item:hover .collab-audience,
  .page-contact .collab-item:focus-within .collab-audience {
    max-height: 8em;
    opacity: 1;
    margin-top: 16px;
    padding-top: 12px;
    border-top-color: var(--pc-hair);
  }
}

.page-contact .collab-figure {
  margin-top: clamp(34px, 5vw, 64px);
}

.page-contact .collab-figure img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  filter: saturate(0.86) brightness(0.82);
}

/* ---------- 合作流程（暖纸反相） ---------- */
.page-contact .contact-process {
  background: var(--paper);
  color: var(--ink-deep);
  border-top: 2px solid var(--ink-deep);
  border-bottom: 2px solid var(--ink-deep);
  padding-block: clamp(46px, 7vw, 92px);
}

.page-contact .contact-process .eyebrow {
  color: var(--pc-ink-dim);
  border-color: rgba(5, 20, 15, 0.28);
}

.page-contact .contact-process .process-intro {
  color: var(--pc-ink-dim);
}

.page-contact .flow-list {
  list-style: none;
  margin: clamp(30px, 4.5vw, 56px) 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-contact .flow-step {
  position: relative;
  padding-left: 36px;
}

.page-contact .flow-dot {
  position: absolute;
  top: 6px;
  left: 2px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--amber);
  box-shadow: 0 0 0 5px rgba(245, 179, 60, 0.22);
}

.page-contact .flow-trigger {
  display: flex;
  align-items: baseline;
  gap: 10px;
  width: 100%;
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  font: inherit;
  text-align: left;
  cursor: pointer;
}

.page-contact .flow-trigger:focus-visible {
  outline: 2px solid var(--cyan-deep);
  outline-offset: 4px;
}

.page-contact .flow-num {
  font-size: 1.2rem;
  color: var(--cyan-deep);
  letter-spacing: 0.04em;
}

.page-contact .flow-name {
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.06rem;
  line-height: 1.4;
}

.page-contact .flow-trigger .expand-sign {
  margin-left: auto;
}

.page-contact .flow-panel {
  margin-top: 10px;
}

.page-contact .flow-panel p {
  margin: 0;
  font-size: 0.91rem;
  line-height: 1.8;
  color: var(--pc-ink-dim);
}

/* ---------- 联系前准备 ---------- */
.page-contact .contact-prep {
  border-top: 2px solid var(--pc-hair);
}

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

.page-contact .prep-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 2px;
  border: 2px solid var(--pc-hair);
  background: var(--grass);
}

.page-contact .prep-item {
  display: flex;
  gap: 16px;
  align-items: baseline;
  padding: 18px clamp(16px, 2.4vw, 24px);
  border-bottom: 1px solid var(--pc-hair);
}

.page-contact .prep-item:last-child {
  border-bottom: 0;
}

.page-contact .prep-num {
  flex: none;
  font-size: 1rem;
  color: var(--violet);
  letter-spacing: 0.08em;
}

.page-contact .prep-text {
  font-size: 0.96rem;
  line-height: 1.75;
  color: var(--pc-ink-soft);
}

/* ---------- 其他入口 ---------- */
.page-contact .contact-more {
  border-top: 2px solid var(--pc-hair);
}

.page-contact .more-links {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: clamp(28px, 4vw, 44px);
}

.page-contact .more-link {
  display: grid;
  gap: 10px;
  padding: clamp(20px, 2.8vw, 30px);
  border: 2px solid var(--pc-hair);
  background: transparent;
  color: var(--white);
  text-decoration: none;
  transition: background var(--t-mid) ease, border-color var(--t-mid) ease, transform var(--t-mid) ease;
}

.page-contact .more-link:hover,
.page-contact .more-link:focus-visible {
  background: var(--grass);
  border-color: var(--cyan);
  transform: translateY(-3px);
}

.page-contact .more-link-label {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--amber);
}

.page-contact .more-link-title {
  font-size: 0.98rem;
  line-height: 1.75;
  color: var(--pc-ink-soft);
}

.page-contact .more-link-go {
  font-size: 0.86rem;
  color: var(--cyan);
}

/* ---------- 收束色带 ---------- */
.page-contact .contact-close {
  background: var(--cyan);
  color: var(--ink-deep);
  padding-block: clamp(34px, 5vw, 58px);
  border-top: 2px solid var(--ink-deep);
}

.page-contact .contact-close-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  align-items: center;
  justify-content: space-between;
}

.page-contact .contact-close-eyebrow {
  color: rgba(5, 20, 15, 0.7);
  border-color: rgba(5, 20, 15, 0.35);
  margin: 0 0 8px;
}

.page-contact .contact-close h2 {
  font-size: clamp(1.25rem, 2.8vw, 1.9rem);
  margin: 0;
  max-width: 26ch;
}

.page-contact .contact-close-btn {
  border-color: var(--ink-deep);
  background: var(--ink-deep);
  color: var(--white);
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .collab-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 22px;
    padding-bottom: 34px;
  }

  .page-contact .collab-item:nth-child(even) {
    transform: translateY(34px);
  }

  .page-contact .collab-item:nth-child(even):hover {
    transform: translate(calc(-2px), calc(34px - 2px));
  }

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

@media (min-width: 860px) {
  .page-contact .prep-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    align-items: start;
  }

  .page-contact .flow-list {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0 22px;
  }

  .page-contact .flow-step:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 12px;
    left: 28px;
    right: -22px;
    height: 2px;
    background: var(--pc-step-line);
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 1fr) minmax(300px, 386px);
    align-items: start;
  }

  .page-contact .contact-card {
    order: -1;
    position: sticky;
    top: calc(var(--pad) + 12px);
  }
}

@media (min-width: 1100px) {
  .page-contact .collab-grid {
    gap: 24px 26px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .collab-item,
  .page-contact .more-link,
  .page-contact .collab-audience {
    transition: none;
  }

  .page-contact .collab-item:hover,
  .page-contact .more-link:hover {
    transform: none;
  }

  .page-contact .collab-item:nth-child(even),
  .page-contact .collab-item:nth-child(even):hover {
    transform: none;
  }
}