.page-contact {
  --pc-edge: rgba(58, 74, 140, .45);
  --pc-edge-hi: rgba(23, 200, 166, .55);
  --pc-panel: rgba(14, 21, 51, .62);
}

/* ============ 首屏：斜向分割 + 紧凑联系卡 ============ */
.page-contact .hero-contact {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding: calc(var(--header-h) + 36px) 0 52px;
  background: var(--ink-900);
  color: var(--mist);
}

.page-contact .hero-contact::after {
  content: "";
  position: absolute;
  top: -25%;
  right: -45%;
  width: 115%;
  height: 158%;
  background: linear-gradient(155deg, var(--ink-600) 0%, var(--ink-700) 30%, var(--ink-800) 68%, var(--ink-900) 100%);
  clip-path: polygon(38% 0%, 100% 0%, 100% 100%, 6% 100%);
  z-index: -1;
  pointer-events: none;
}

.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 22px;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--steel);
}

.page-contact .crumbs a {
  color: var(--steel);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-contact .crumbs a:hover {
  color: var(--teal);
}

.page-contact .crumbs-sep {
  color: var(--line);
}

.page-contact .hero-grid {
  display: grid;
  gap: 30px;
}

.page-contact .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--azure);
}

.page-contact .hero-main h1 {
  margin: 14px 0 18px;
  max-width: 13ch;
  font-size: clamp(34px, 8.4vw, 68px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -.02em;
  color: var(--mist);
}

.page-contact .hero-lede {
  margin: 0;
  max-width: 50ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--steel);
}

.page-contact .jump-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .jump-pills a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 9px 18px;
  border-radius: var(--r-pill);
  border: 1px solid var(--pc-edge);
  background: rgba(7, 11, 34, .55);
  color: var(--mist);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .05em;
  text-decoration: none;
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-contact .jump-pills a::before {
  content: "→";
  color: var(--teal);
}

.page-contact .jump-pills a:hover {
  border-color: var(--pc-edge-hi);
  color: var(--teal);
}

.page-contact .hero-side {
  display: grid;
  gap: 18px;
  align-content: start;
}

.page-contact .quickcard {
  padding: 24px 22px;
  border: 1px solid var(--pc-edge);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(35, 48, 122, .62) 0%, rgba(7, 11, 34, .94) 100%);
  box-shadow: 0 26px 60px -34px rgba(7, 11, 34, .95);
}

.page-contact .quickcard-label {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-contact .quickcard-mail {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: clamp(15px, 4vw, 19px);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
  color: var(--mist);
  overflow-wrap: anywhere;
  -webkit-user-select: all;
  user-select: all;
}

.page-contact .quickcard-note {
  margin: 0 0 20px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--steel);
}

.page-contact .hero-visual {
  margin: 0;
  aspect-ratio: 3 / 2;
  border: 1px solid var(--pc-edge);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
}

.page-contact .hero-visual img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
}

/* ============ 章节通用 ============ */
.page-contact .section {
  padding: 56px 0;
}

.page-contact .section-title {
  margin: 12px 0 14px;
  font-size: clamp(26px, 4.4vw, 40px);
  font-weight: 700;
  line-height: 1.16;
  letter-spacing: -.015em;
  color: var(--mist);
}

.page-contact .section-lede {
  margin: 0;
  max-width: 48ch;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--steel);
}

/* ============ 01 合作方向 ============ */
.page-contact .coop-grid {
  display: grid;
  gap: 32px;
}

.page-contact .coop-list {
  display: grid;
  gap: 12px;
}

.page-contact .coop-item {
  border: 1px solid var(--pc-edge);
  border-radius: var(--r-md);
  background: rgba(7, 11, 34, .5);
  overflow: hidden;
  transition: border-color 200ms var(--ease);
}

.page-contact .coop-item:hover {
  border-color: var(--pc-edge-hi);
}

.page-contact .coop-item[open] {
  border-color: rgba(23, 200, 166, .42);
  background: rgba(7, 11, 34, .72);
}

.page-contact .coop-summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .coop-code {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: var(--r-sm);
  background: rgba(23, 200, 166, .13);
  color: var(--teal);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
}

.page-contact .coop-name {
  flex: 1 1 auto;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .coop-arrow {
  flex: 0 0 auto;
  width: 9px;
  height: 9px;
  margin-right: 4px;
  border-right: 2px solid var(--steel);
  border-bottom: 2px solid var(--steel);
  transform: rotate(45deg);
  transition: transform 240ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .coop-item[open] .coop-arrow {
  transform: rotate(-135deg);
  border-color: var(--teal);
}

.page-contact .coop-item .disclosure-body {
  padding: 0 20px 22px 64px;
}

.page-contact .coop-text {
  margin: 0 0 16px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--steel);
}

.page-contact .coop-need-label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--azure);
}

.page-contact .coop-need {
  display: grid;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .coop-need li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .coop-need li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--teal);
}

/* ============ 02 合作边界 ============ */
.page-contact .boundary-grid {
  display: grid;
  gap: 20px;
}

.page-contact .boundary-col {
  padding: 26px 22px;
  border: 1px solid var(--pc-edge);
  border-radius: var(--r-lg);
}

.page-contact .boundary-col--no {
  background: rgba(7, 11, 34, .58);
}

.page-contact .boundary-col--alt {
  background: rgba(23, 200, 166, .055);
  border-color: rgba(23, 200, 166, .22);
}

.page-contact .no-list {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .no-item {
  position: relative;
  padding: 14px 16px 14px 42px;
  border: 1px solid var(--line-28);
  border-radius: var(--r-sm);
  background: rgba(14, 21, 51, .62);
  font-size: 15px;
  line-height: 1.68;
  color: var(--mist);
  transition: border-color 200ms var(--ease), background 200ms var(--ease);
}

.page-contact .no-item::before {
  content: "×";
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--flare);
}

.page-contact .no-item:hover {
  border-color: rgba(255, 106, 26, .55);
  background: rgba(255, 106, 26, .07);
}

.page-contact .boundary-alt-title {
  margin: 12px 0 0;
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .alt-list {
  display: grid;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .alt-list li {
  border-bottom: 1px solid var(--line-28);
}

.page-contact .alt-list li:last-child {
  border-bottom: 0;
}

.page-contact .alt-list a {
  display: block;
  padding: 14px 0 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--mist);
  text-decoration: none;
  transition: color 200ms var(--ease);
}

.page-contact .alt-list a:hover {
  color: var(--teal);
}

.page-contact .alt-list p {
  margin: 0;
  padding-bottom: 14px;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ============ 03 联系渠道 ============ */
.page-contact .channel-grid {
  display: grid;
  gap: 16px;
  margin-top: 32px;
}

.page-contact .channel-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  border: 1px solid var(--pc-edge);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(22, 32, 90, .55) 0%, rgba(7, 11, 34, .88) 100%);
  transition: border-color 200ms var(--ease);
}

.page-contact .channel-card:hover {
  border-color: var(--pc-edge-hi);
}

.page-contact .channel-key {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--teal);
}

.page-contact .channel-val {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1.62;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
  overflow-wrap: anywhere;
  -webkit-user-select: all;
  user-select: all;
}

.page-contact .channel-desc {
  margin: 0;
  font-size: 13.5px;
  line-height: 1.76;
  color: var(--steel);
}

.page-contact .channel-footnote {
  margin: 24px 0 0;
  padding: 4px 0 4px 16px;
  border-left: 2px solid rgba(23, 200, 166, .5);
  font-size: 13.5px;
  line-height: 1.82;
  color: var(--steel);
}

/* ============ 04 处理顺序 ============ */
.page-contact .flow-list {
  display: grid;
  gap: 14px;
  margin: 34px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .flow-item {
  padding: 22px 20px;
  border: 1px solid var(--line-28);
  border-radius: var(--r-md);
  background: rgba(14, 21, 51, .62);
}

.page-contact .flow-step {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 26px;
  font-weight: 600;
  letter-spacing: .02em;
  color: rgba(23, 200, 166, .58);
}

.page-contact .flow-title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 600;
  letter-spacing: -.01em;
  color: var(--mist);
}

.page-contact .flow-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.82;
  color: var(--steel);
}

.page-contact .flow-note {
  margin: 22px 0 0;
  padding: 16px 18px;
  border: 1px solid rgba(23, 200, 166, .28);
  border-radius: var(--r-md);
  background: rgba(23, 200, 166, .07);
  font-size: 14px;
  line-height: 1.78;
  color: var(--mist);
}

/* ============ 05 备案与合规 ============ */
.page-contact .section.compliance {
  background: var(--ink-900);
  border-top: 1px solid var(--line-28);
}

.page-contact .compliance-inner {
  display: grid;
  gap: 28px;
  align-items: center;
}

.page-contact .compliance-visual {
  margin: 0;
  aspect-ratio: 10 / 7;
  border: 1px solid var(--line-28);
  border-radius: var(--r-lg);
  overflow: hidden;
  background: var(--ink-900);
}

.page-contact .compliance-visual img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: .85;
}

.page-contact .compliance-list {
  display: grid;
  margin: 24px 0 0;
  border-top: 1px solid var(--line-28);
}

.page-contact .compliance-list > div {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line-28);
}

.page-contact .compliance-list dt {
  flex: 0 0 88px;
  padding-top: 3px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--steel);
}

.page-contact .compliance-list dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-variant-numeric: tabular-nums;
  color: var(--mist);
  overflow-wrap: anywhere;
}

.page-contact .compliance-note {
  margin: 22px 0 0;
  max-width: 64ch;
  font-size: 14px;
  line-height: 1.82;
  color: var(--steel);
}

/* ============ 响应式 ============ */
@media (min-width: 640px) {
  .page-contact .section {
    padding: 72px 0;
  }

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

  .page-contact .compliance-list dt {
    flex: 0 0 104px;
  }
}

@media (min-width: 860px) {
  .page-contact .hero-contact {
    padding: calc(var(--header-h) + 56px) 0 76px;
  }

  .page-contact .hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 52px;
    align-items: start;
  }

  .page-contact .section {
    padding: 88px 0;
  }

  .page-contact .coop-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .boundary-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: 28px;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .flow-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .compliance-inner {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: 48px;
  }
}

@media (max-width: 767px) {
  .page-contact .hero-contact::after {
    display: none;
  }

  .page-contact .hero-contact {
    background: linear-gradient(180deg, var(--ink-900) 0%, var(--ink-800) 100%);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .crumbs a,
  .page-contact .jump-pills a,
  .page-contact .coop-item,
  .page-contact .coop-arrow,
  .page-contact .no-item,
  .page-contact .alt-list a,
  .page-contact .channel-card {
    transition: none;
  }
}