.page-contact {
  --pc-cut: 9deg;
  --pc-hair: rgba(44, 74, 114, 0.55);
  --pc-hair-soft: rgba(44, 74, 114, 0.32);
  --pc-ink-soft: #41506a;
  background: var(--night-900);
  color: var(--mist-200);
  overflow-x: clip;
}

/* ============ 首屏 ============ */
.page-contact .pc-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(104px, 18vw, 190px) 0 clamp(52px, 8vw, 96px);
  background:
    radial-gradient(115% 85% at 88% -12%, rgba(184, 255, 61, 0.16), rgba(184, 255, 61, 0) 58%),
    linear-gradient(180deg, var(--night-900) 0%, var(--navy-800) 100%);
}

.page-contact .pc-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(44, 74, 114, 0.30) 1px, transparent 1px),
    linear-gradient(90deg, rgba(44, 74, 114, 0.30) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0) 78%);
  mask-image: linear-gradient(180deg, #000 0%, rgba(0, 0, 0, 0) 78%);
  pointer-events: none;
}

.page-contact .pc-hero::before {
  content: "";
  position: absolute;
  top: 0;
  right: -12%;
  width: 48%;
  height: 100%;
  background: linear-gradient(180deg, rgba(255, 90, 43, 0.14), rgba(255, 90, 43, 0) 68%);
  transform: skewX(calc(-1 * var(--pc-cut)));
  pointer-events: none;
}

.page-contact .pc-hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  gap: clamp(32px, 5vw, 56px);
  align-items: center;
}

.page-contact .pc-hero-copy .kicker {
  color: var(--lime-400);
}

.page-contact .pc-hero h1 {
  margin: 20px 0 0;
  font-size: clamp(36px, 7.2vw, 82px);
  font-weight: 200;
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper-050);
  max-width: 16ch;
}

.page-contact .pc-hero-lede {
  margin: 24px 0 0;
  max-width: 56ch;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.85;
  color: var(--mist-200);
}

.page-contact .pc-hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.page-contact .pc-hero-media {
  margin: 0;
  border-left: 5px solid var(--lime-400);
}

.page-contact .pc-hero-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 联络通道 ============ */
.page-contact .pc-channels {
  padding: clamp(64px, 10vw, 120px) 0;
  background: var(--navy-800);
  border-top: 1px solid var(--pc-hair);
}

.page-contact .pc-channel-grid {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--pc-hair);
}

.page-contact .pc-channel {
  padding: 26px 0;
  border-bottom: 1px solid var(--pc-hair);
}

.page-contact .pc-channel-label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--steel-400);
}

.page-contact .pc-channel-value {
  margin: 12px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 4vw, 24px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--lime-400);
  overflow-wrap: anywhere;
}

.page-contact .pc-channel-value--addr {
  font-family: var(--font-sans);
  font-size: clamp(16px, 2.4vw, 20px);
  font-weight: 500;
  color: var(--paper-050);
  letter-spacing: 0.01em;
}

.page-contact .pc-channel-note {
  margin: 14px 0 0;
  max-width: 42ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-contact .copy-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 16px;
  padding: 8px 15px;
  border: 1px solid var(--steel-600);
  border-radius: 0;
  background: transparent;
  color: var(--mist-200);
  font-family: var(--font-sans);
  font-size: 13px;
  letter-spacing: 0.06em;
  cursor: pointer;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .copy-btn:hover,
.page-contact .copy-btn:focus-visible {
  border-color: var(--lime-400);
  color: var(--lime-400);
}

.page-contact .pc-inline-details {
  margin-top: 16px;
  border-top: 1px solid var(--pc-hair-soft);
}

.page-contact .pc-inline-details > summary {
  list-style: none;
  cursor: pointer;
  padding: 12px 22px 12px 0;
  position: relative;
  font-size: 13.5px;
  letter-spacing: 0.04em;
  color: var(--steel-400);
}

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

.page-contact .pc-inline-details > summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  color: var(--lime-400);
}

.page-contact .pc-inline-details[open] > summary::after {
  content: "–";
}

.page-contact .pc-inline-details > summary:hover {
  color: var(--mist-200);
}

.page-contact .pc-inline-details p {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist-200);
}

.page-contact .pc-service-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 32px;
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid var(--pc-hair-soft);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--steel-400);
}

.page-contact .pc-service-bar b {
  font-weight: 600;
  color: var(--mist-200);
  margin-right: 8px;
}

/* ============ 四步对接 ============ */
.page-contact .pc-steps {
  padding: clamp(64px, 10vw, 120px) 0;
  background: var(--night-900);
}

.page-contact .pc-flow {
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--pc-hair);
}

.page-contact .pc-flow-item {
  border-bottom: 1px solid var(--pc-hair);
}

.page-contact .pc-flow-item > summary {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 14px;
  align-items: baseline;
  list-style: none;
  cursor: pointer;
  padding: 22px 0;
}

.page-contact .pc-flow-item > summary::-webkit-details-marker {
  display: none;
}

.page-contact .pc-flow-no {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--steel-400);
  transition: color 0.2s var(--ease);
}

.page-contact .pc-flow-title {
  font-size: clamp(17px, 2.4vw, 22px);
  font-weight: 500;
  line-height: 1.4;
  color: var(--paper-050);
  transition: color 0.2s var(--ease);
}

.page-contact .pc-flow-tag {
  white-space: nowrap;
  padding: 3px 10px;
  border: 1px solid var(--steel-600);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--steel-400);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .pc-flow-item > summary:hover .pc-flow-title {
  color: var(--lime-400);
}

.page-contact .pc-flow-item[open] > summary {
  padding-bottom: 12px;
}

.page-contact .pc-flow-item[open] .pc-flow-no {
  color: var(--lime-400);
}

.page-contact .pc-flow-item[open] .pc-flow-tag {
  border-color: var(--lime-400);
  color: var(--lime-400);
}

.page-contact .pc-flow-body {
  padding: 0 0 26px;
}

.page-contact .pc-flow-body p {
  margin: 0 0 10px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-200);
}

.page-contact .pc-flow-body p:last-child {
  margin-bottom: 0;
}

.page-contact .pc-steps-more {
  margin: 26px 0 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--steel-400);
}

.page-contact .pc-steps-more a,
.page-contact .pc-text-link {
  color: var(--lime-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(184, 255, 61, 0.45);
  transition: border-color 0.2s var(--ease);
}

.page-contact .pc-steps-more a:hover,
.page-contact .pc-text-link:hover {
  border-color: var(--lime-400);
}

.page-contact .pc-steps-media {
  margin: 34px 0 0;
}

.page-contact .pc-steps-media img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============ 赛区与内容合作 ============ */
.page-contact .pc-partners {
  padding: clamp(64px, 10vw, 120px) 0;
  background: var(--navy-800);
  border-top: 1px solid var(--pc-hair);
}

.page-contact .pc-partner-grid {
  display: grid;
  gap: 0;
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--pc-hair);
}

.page-contact .pc-partner {
  padding: 26px 0 32px;
  border-bottom: 1px solid var(--pc-hair);
}

.page-contact .pc-partner-index {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime-400);
}

.page-contact .pc-partner h3 {
  margin: 0 0 12px;
  font-size: clamp(18px, 2.6vw, 24px);
  font-weight: 500;
  line-height: 1.35;
  color: var(--paper-050);
}

.page-contact .pc-partner p {
  margin: 0;
  max-width: 46ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-200);
}

/* ============ 常见需求 ============ */
.page-contact .pc-needs {
  padding: clamp(64px, 10vw, 120px) 0;
  background: var(--night-900);
}

.page-contact .pc-need-list {
  margin-top: clamp(28px, 4vw, 44px);
  border-top: 1px solid var(--pc-hair);
}

.page-contact .pc-need {
  border-bottom: 1px solid var(--pc-hair);
}

.page-contact .pc-need > summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 20px 38px 20px 0;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.6;
  color: var(--paper-050);
  transition: color 0.2s var(--ease);
}

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

.page-contact .pc-need > summary::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--lime-400);
}

.page-contact .pc-need[open] > summary::after {
  content: "–";
}

.page-contact .pc-need > summary:hover {
  color: var(--lime-400);
}

.page-contact .pc-need-body {
  padding: 0 0 22px;
}

.page-contact .pc-need-body p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--mist-200);
}

.page-contact .pc-quick {
  margin-top: 34px;
  padding: 24px;
  border: 1px solid var(--pc-hair);
  background: var(--navy-800);
}

.page-contact .pc-quick-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime-400);
}

.page-contact .pc-quick p {
  margin: 0 0 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist-200);
}

/* ============ 准备清单（浅色画板） ============ */
.page-contact .pc-prep {
  padding: clamp(64px, 10vw, 120px) 0;
  background: var(--paper-050);
  color: var(--ink-950);
}

.page-contact .pc-prep .kicker {
  color: var(--ember-500);
}

.page-contact .pc-prep .section-title {
  color: var(--ink-950);
}

.page-contact .pc-checklist {
  list-style: none;
  margin: clamp(28px, 4vw, 44px) 0 0;
  padding: 0;
  border-top: 1px solid rgba(11, 18, 32, 0.16);
}

.page-contact .pc-checklist li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid rgba(11, 18, 32, 0.16);
}

.page-contact .pc-checklist li > .data-mono {
  padding-top: 4px;
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ember-500);
}

.page-contact .pc-checklist h3 {
  margin: 0 0 6px;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--ink-950);
}

.page-contact .pc-checklist p {
  margin: 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--pc-ink-soft);
}

.page-contact .pc-prep-aside {
  margin-top: 34px;
  padding: 26px 24px;
  background: var(--navy-800);
  color: var(--mist-200);
  border-left: 5px solid var(--lime-400);
}

.page-contact .pc-prep-aside-title {
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--lime-400);
}

.page-contact .pc-prep-aside p {
  margin: 0 0 12px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist-200);
}

.page-contact .pc-prep-aside-mono {
  margin: 16px 0 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: -0.01em;
  color: var(--lime-400);
  overflow-wrap: anywhere;
}

.page-contact .copy-btn--dark {
  border-color: var(--steel-600);
  color: var(--mist-200);
}

/* ============ 底部窄带 ============ */
.page-contact .pc-tail {
  background: var(--night-900);
  border-top: 1px solid var(--pc-hair);
}

.page-contact .pc-tail-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px 32px;
  padding: 26px 0;
}

.page-contact .pc-tail p {
  margin: 0;
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--steel-400);
}

.page-contact .pc-tail-links {
  display: flex;
  gap: 24px;
}

.page-contact .pc-tail-links a {
  font-size: 14px;
  color: var(--mist-200);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .pc-tail-links a:hover,
.page-contact .pc-tail-links a:focus-visible {
  color: var(--lime-400);
  border-color: var(--lime-400);
}

/* ============ 响应式 ============ */
@media (min-width: 860px) {
  .page-contact .pc-channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .pc-channel {
    padding: 32px 28px 40px 0;
  }

  .page-contact .pc-channel + .pc-channel {
    padding-left: 28px;
    border-left: 1px solid var(--pc-hair);
  }
}

@media (min-width: 900px) {
  .page-contact .pc-partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .pc-partner {
    padding: 32px 30px 44px 0;
  }

  .page-contact .pc-partner + .pc-partner {
    padding-left: 30px;
    border-left: 1px solid var(--pc-hair);
  }
}

@media (min-width: 960px) {
  .page-contact .pc-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  }

  .page-contact .pc-steps-media,
  .page-contact .pc-quick,
  .page-contact .pc-prep-aside {
    margin-top: 0;
  }
}

@media (max-width: 500px) {
  .page-contact .pc-flow-item > summary {
    grid-template-columns: auto 1fr;
    row-gap: 8px;
  }

  .page-contact .pc-flow-tag {
    grid-column: 2;
    justify-self: start;
  }

  .page-contact .pc-hero-media {
    border-left-width: 3px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}