.page-contact {
  --contact-panel-bg: linear-gradient(158deg, rgba(27, 34, 48, .94), rgba(11, 14, 20, .92));
  --contact-underline: linear-gradient(90deg, var(--flame), var(--data-blue));
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(34px, 6vw, 88px) clamp(30px, 5vw, 72px);
  background:
    radial-gradient(90% 72% at 94% 0%, rgba(244, 85, 43, .20), transparent 62%),
    radial-gradient(72% 62% at 0% 96%, rgba(46, 123, 224, .16), transparent 64%);
}

.page-contact .contact-hero .breadcrumb {
  margin-bottom: clamp(22px, 3.6vw, 46px);
}

.page-contact .contact-hero-grid {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: center;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .hero-rule {
  height: 3px;
  width: min(210px, 42%);
  margin: 20px 0 22px;
  border-radius: 3px;
  background: var(--contact-underline);
}

.page-contact .contact-hero-copy .lede {
  max-width: 46ch;
}

.page-contact .contact-fact-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  margin: clamp(24px, 3.6vw, 40px) 0 0;
  padding: clamp(16px, 2.4vw, 22px) 0 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.page-contact .contact-fact-row li {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 14px;
  color: var(--ink-dim);
}

.page-contact .contact-fact-row .data-num {
  font-size: clamp(19px, 2.2vw, 24px);
  color: var(--ember);
}

.page-contact .contact-hero-media {
  position: relative;
  margin: 0;
  aspect-ratio: 14 / 9;
  overflow: hidden;
  background: linear-gradient(148deg, rgba(244, 85, 43, .30), rgba(46, 123, 224, .24));
  clip-path: polygon(0 0, 100% 0, 100% 84%, 12% 100%, 0 100%);
}

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

/* ---------- 事由索引 ---------- */
.page-contact .reason-deck {
  padding-block: clamp(34px, 5.4vw, 78px);
}

.page-contact .reason-index {
  position: relative;
  display: grid;
  gap: clamp(22px, 3vw, 40px);
  margin-top: clamp(26px, 4vw, 46px);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .reason-input {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.page-contact .reason-input:focus-visible ~ .reason-tabs {
  outline: 2px solid var(--mist);
  outline-offset: 8px;
  border-radius: 4px;
}

.page-contact .reason-tabs {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.page-contact .reason-tab {
  position: relative;
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 15px 6px 15px 16px;
  border-left: 2px solid var(--line);
  color: var(--ink-dim);
  font-size: 16px;
  line-height: 1.4;
  cursor: pointer;
  transition: color .24s var(--ease), border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-contact .reason-tab::before {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 2px;
  background: var(--contact-underline);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform .32s var(--ease);
}

.page-contact .reason-tab:hover {
  color: var(--lamp);
  border-left-color: var(--line-strong);
}

.page-contact .reason-no {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--ink-faint);
  transition: color .24s var(--ease);
}

.page-contact .reason-input:nth-of-type(1):checked ~ .reason-tabs .reason-tab:nth-of-type(1),
.page-contact .reason-input:nth-of-type(2):checked ~ .reason-tabs .reason-tab:nth-of-type(2),
.page-contact .reason-input:nth-of-type(3):checked ~ .reason-tabs .reason-tab:nth-of-type(3),
.page-contact .reason-input:nth-of-type(4):checked ~ .reason-tabs .reason-tab:nth-of-type(4),
.page-contact .reason-input:nth-of-type(5):checked ~ .reason-tabs .reason-tab:nth-of-type(5) {
  color: var(--lamp);
  border-left-color: var(--flame);
  background: linear-gradient(90deg, rgba(244, 85, 43, .14), transparent 74%);
}

.page-contact .reason-input:nth-of-type(1):checked ~ .reason-tabs .reason-tab:nth-of-type(1)::before,
.page-contact .reason-input:nth-of-type(2):checked ~ .reason-tabs .reason-tab:nth-of-type(2)::before,
.page-contact .reason-input:nth-of-type(3):checked ~ .reason-tabs .reason-tab:nth-of-type(3)::before,
.page-contact .reason-input:nth-of-type(4):checked ~ .reason-tabs .reason-tab:nth-of-type(4)::before,
.page-contact .reason-input:nth-of-type(5):checked ~ .reason-tabs .reason-tab:nth-of-type(5)::before {
  transform: scaleX(1);
}

.page-contact .reason-input:nth-of-type(1):checked ~ .reason-tabs .reason-tab:nth-of-type(1) .reason-no,
.page-contact .reason-input:nth-of-type(2):checked ~ .reason-tabs .reason-tab:nth-of-type(2) .reason-no,
.page-contact .reason-input:nth-of-type(3):checked ~ .reason-tabs .reason-tab:nth-of-type(3) .reason-no,
.page-contact .reason-input:nth-of-type(4):checked ~ .reason-tabs .reason-tab:nth-of-type(4) .reason-no,
.page-contact .reason-input:nth-of-type(5):checked ~ .reason-tabs .reason-tab:nth-of-type(5) .reason-no {
  color: var(--ember);
}

.page-contact .reason-photo {
  margin: clamp(20px, 3vw, 30px) 0 0;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border: 1px solid var(--line);
  background: linear-gradient(160deg, rgba(46, 123, 224, .22), rgba(244, 85, 43, .16));
}

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

.page-contact .reason-panels {
  position: relative;
}

.page-contact .reason-panel {
  display: none;
  padding: clamp(22px, 3vw, 34px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--flame);
  border-radius: 3px;
  background: var(--contact-panel-bg);
}

.page-contact .reason-input:nth-of-type(1):checked ~ .reason-panels .reason-panel:nth-of-type(1),
.page-contact .reason-input:nth-of-type(2):checked ~ .reason-panels .reason-panel:nth-of-type(2),
.page-contact .reason-input:nth-of-type(3):checked ~ .reason-panels .reason-panel:nth-of-type(3),
.page-contact .reason-input:nth-of-type(4):checked ~ .reason-panels .reason-panel:nth-of-type(4),
.page-contact .reason-input:nth-of-type(5):checked ~ .reason-panels .reason-panel:nth-of-type(5) {
  display: block;
  animation: contact-panel-in .34s var(--ease) both;
}

.page-contact .reason-name {
  margin: 0 0 18px;
  font-size: clamp(19px, 2.2vw, 24px);
  font-weight: 500;
  color: var(--lamp);
}

.page-contact .reason-meta {
  display: grid;
  gap: 4px 20px;
  margin: 0;
}

.page-contact .reason-meta dt {
  padding-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--ember);
}

.page-contact .reason-meta dd {
  margin: 0 0 16px;
  color: var(--ink-dim);
  font-size: 15.5px;
  line-height: 1.8;
}

.page-contact .reason-meta dd:last-child {
  margin-bottom: 0;
}

.page-contact .reason-meta a,
.page-contact .reason-link {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 154, 92, .42);
  transition: color .22s var(--ease), border-color .22s var(--ease);
}

.page-contact .reason-meta a:hover,
.page-contact .reason-link:hover {
  color: var(--flame);
  border-bottom-color: var(--flame);
}

.page-contact .reason-links {
  margin: 22px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-size: 15px;
}

/* ---------- 渠道卡 ---------- */
.page-contact .channel-deck {
  padding-block: clamp(34px, 5.4vw, 78px);
}

.page-contact .channel-grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(26px, 4vw, 46px);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(22px, 3vw, 32px);
  border: 1px solid rgba(11, 14, 20, .14);
  border-radius: 3px;
  background: var(--paper);
  color: var(--void);
  box-shadow: 10px 14px 0 rgba(244, 85, 43, .12);
  transition: transform .28s var(--ease), box-shadow .28s var(--ease);
}

.page-contact .channel-card:hover {
  transform: translateY(-4px);
  box-shadow: 12px 20px 0 rgba(46, 123, 224, .16);
}

.page-contact .channel-card .badge {
  align-self: flex-start;
}

.page-contact .channel-value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(17px, 2vw, 23px);
  font-weight: 500;
  line-height: 1.4;
  color: var(--flame-deep);
  word-break: break-word;
}

.page-contact .channel-value--select {
  user-select: all;
}

.page-contact .channel-value--sm {
  font-size: clamp(15px, 1.6vw, 18px);
}

.page-contact .channel-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(11, 14, 20, .74);
}

.page-contact .channel-tag {
  margin: auto 0 0;
  padding-top: 14px;
}

/* ---------- 合作与纠错 ---------- */
.page-contact .partner-deck {
  padding-block: clamp(36px, 5.4vw, 82px);
}

.page-contact .partner-grid {
  display: grid;
  gap: clamp(24px, 3.4vw, 44px);
  margin-top: clamp(26px, 4vw, 46px);
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .partner-item {
  padding-top: 18px;
  border-top: 2px solid var(--flame-deep);
}

.page-contact .partner-no {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--flame-deep);
  opacity: .72;
}

.page-contact .partner-name {
  margin: 0 0 14px;
  font-size: clamp(19px, 2.2vw, 23px);
  font-weight: 500;
}

.page-contact .partner-item ul {
  margin: 0 0 16px;
  padding-left: 18px;
}

.page-contact .partner-item li {
  margin-bottom: 7px;
  font-size: 15px;
  line-height: 1.7;
}

.page-contact .partner-note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
}

.page-contact .section--light a {
  color: var(--flame-deep);
}

/* ---------- 小提示 ---------- */
.page-contact .qa-deck {
  padding-block: clamp(30px, 4.6vw, 66px);
}

.page-contact .qa-list {
  margin-top: clamp(20px, 3vw, 34px);
  border-bottom: 1px solid var(--line);
}

.page-contact .qa-item {
  border-top: 1px solid var(--line);
}

.page-contact .qa-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 16px 0;
  font-size: 16.5px;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.page-contact .qa-item summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 21px;
  line-height: 1;
  color: var(--flame);
  transition: transform .24s var(--ease), color .24s var(--ease);
}

.page-contact .qa-item[open] summary::after {
  content: "–";
  color: var(--data-blue);
}

.page-contact .qa-item p {
  max-width: 64ch;
  margin: 0 0 18px;
  color: var(--ink-dim);
  font-size: 15px;
  line-height: 1.85;
}

.page-contact .qa-foot {
  margin: 22px 0 0;
  font-size: 14.5px;
  color: var(--ink-dim);
}

.page-contact .qa-foot a {
  color: var(--ember);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 154, 92, .42);
}

/* ---------- 备案 ---------- */
.page-contact .registry-deck {
  padding-block: clamp(36px, 5.4vw, 84px);
}

.page-contact .registry-inner {
  display: grid;
  gap: clamp(26px, 4vw, 56px);
  align-items: start;
  grid-template-columns: minmax(0, 1fr);
}

.page-contact .registry-copy p {
  max-width: 46ch;
  margin: 0;
  line-height: 1.85;
}

.page-contact .registry-panel {
  margin: 0;
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--line);
  border-left: 3px solid var(--flame);
  background: rgba(255, 255, 255, .42);
}

.page-contact .registry-panel dt {
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  opacity: .6;
}

.page-contact .registry-panel dd {
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: clamp(19px, 3vw, 30px);
  font-weight: 500;
  letter-spacing: -.01em;
  line-height: 1.3;
  word-break: break-word;
}

.page-contact .registry-panel dd:last-child {
  margin-bottom: 0;
}

@keyframes contact-panel-in {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------- 断点 ---------- */
@media (min-width: 560px) {
  .page-contact .reason-meta {
    grid-template-columns: 88px minmax(0, 1fr);
  }

  .page-contact .reason-meta dd {
    margin-bottom: 14px;
  }
}

@media (min-width: 760px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (min-width: 900px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .95fr);
  }

  .page-contact .reason-index {
    grid-template-columns: minmax(0, .76fr) minmax(0, 1.24fr);
    align-items: start;
  }

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

  .page-contact .channel-card:nth-child(2) {
    transform: translateY(18px);
  }

  .page-contact .channel-card:nth-child(2):hover {
    transform: translateY(14px);
  }

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

  .page-contact .registry-inner {
    grid-template-columns: minmax(0, 1fr) minmax(0, .92fr);
  }

  .page-contact .reason-photo {
    margin-top: clamp(26px, 4vw, 42px);
  }
}

@media (min-width: 1180px) {
  .page-contact .contact-hero-media {
    aspect-ratio: 14 / 8.6;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .reason-panel {
    animation: none;
  }

  .page-contact .channel-card,
  .page-contact .reason-tab,
  .page-contact .reason-tab::before,
  .page-contact .qa-item summary::after {
    transition: none;
  }
}
<<<END>>>