.page-contact {
  --pc-gap: clamp(1rem, 2.4vw, 1.6rem);
  --pc-panel: clamp(1.25rem, 3.2vw, 2.4rem);
  padding-block-end: 0;
  overflow-x: clip;
}

/* 面包屑 */
.page-contact .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .35rem .6rem;
  margin: 0 0 clamp(1rem, 3vw, 2rem);
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--muted);
}
.page-contact .crumb {
  color: var(--muted);
  text-decoration: none;
}
.page-contact a.crumb:hover {
  color: var(--fg);
}
.page-contact .crumb[aria-current="page"] {
  color: var(--fg);
}
.page-contact .crumb + .crumb::before {
  content: "／";
  margin-right: .6rem;
  color: var(--line-strong);
}

/* 首屏 */
.page-contact .contact-hero {
  padding-block: clamp(1rem, 3vw, 2rem) clamp(2rem, 6vw, 4rem);
}
.page-contact .hero-grid {
  align-items: start;
}
.page-contact .hero-title {
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 6.2vw, 60px);
  line-height: 1.06;
  letter-spacing: -.02em;
  margin: .55rem 0 clamp(1rem, 2.4vw, 1.5rem);
  color: var(--fg);
}
.page-contact .hero-lead {
  max-width: 44ch;
  color: var(--fg);
  opacity: .84;
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.75;
  margin: 0;
}
.page-contact .hero-aside {
  margin-top: 1.75rem;
}
.page-contact .hero-panel {
  padding: var(--pc-panel);
  border-top: 3px solid var(--accent);
}
.page-contact .hero-panel-label {
  margin: 0 0 .5rem;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}
.page-contact .hero-panel-num {
  margin: 0 0 .7rem;
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(28px, 4.6vw, 42px);
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}
.page-contact .hero-panel-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}

/* 章节长卷 */
.page-contact .chapter {
  position: relative;
  padding-block: clamp(2.5rem, 6vw, 5rem) 0;
}
.page-contact .chapter-band {
  height: 8px;
  width: 100%;
  background: linear-gradient(90deg, var(--accent) 0%, rgba(255, 106, 26, 0) 72%);
  margin-bottom: clamp(1.5rem, 3.5vw, 2.25rem);
}
.page-contact .chapter-head {
  display: grid;
  gap: .5rem;
  margin-bottom: clamp(1.6rem, 4vw, 2.75rem);
}
.page-contact .chapter-num {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--accent);
}
.page-contact .chapter-title {
  margin: 0;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(23px, 4vw, 42px);
  line-height: 1.15;
  letter-spacing: -.015em;
  color: var(--fg);
}
.page-contact .chapter-desc {
  margin: .3rem 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

/* 三类诉求分流卡 */
.page-contact .triage-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}
.page-contact .triage-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: .7rem;
  padding: calc(var(--pc-panel) - .3rem) var(--pc-panel) calc(var(--pc-panel) + .4rem);
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: inherit;
  text-decoration: none;
  transition: background .3s var(--ease), border-color .3s var(--ease), transform .3s var(--ease);
}
.page-contact .triage-card:hover,
.page-contact .triage-card:focus-visible {
  background: var(--ink-2);
  border-color: var(--line-strong);
  transform: translateY(-3px);
}
.page-contact .triage-card::after {
  content: "";
  position: absolute;
  left: var(--pc-panel);
  bottom: 0;
  width: 44px;
  height: 3px;
  background: var(--accent);
  transition: width .38s var(--ease);
}
.page-contact .triage-card:hover::after,
.page-contact .triage-card:focus-visible::after {
  width: calc(100% - var(--pc-panel) * 2);
}
.page-contact .triage-index {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}
.page-contact .triage-title {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 22px);
  font-weight: 800;
  color: var(--fg);
}
.page-contact .triage-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
}
.page-contact .triage-go {
  margin-top: auto;
  padding-top: .55rem;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--accent);
}

/* 图片 */
.page-contact .media-frame {
  position: relative;
  margin: clamp(1.75rem, 4vw, 3rem) 0 0;
  aspect-ratio: auto;
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}
.page-contact .media-frame img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
}
.page-contact .media-frame--diagonal::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(115deg, rgba(255, 106, 26, .18) 0%, rgba(255, 106, 26, 0) 46%);
}
.page-contact .media-caption {
  margin: .7rem 0 0;
  padding: 0 var(--pc-panel) .9rem;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

/* 三类注册情形 */
.page-contact .rest-grid {
  align-items: start;
  row-gap: clamp(1.5rem, 4vw, 2.5rem);
}
.page-contact .rest-grid .media-frame {
  margin-top: 0;
}
.page-contact .case-list {
  list-style: none;
  margin: 0;
  padding: 0;
}
.page-contact .case-item {
  display: grid;
  gap: .4rem;
  padding: clamp(1rem, 2.4vw, 1.4rem) 0;
  border-top: 1px solid var(--line);
}
.page-contact .case-item:last-child {
  border-bottom: 1px solid var(--line);
}
.page-contact .case-tag {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--accent);
}
.page-contact .case-title {
  margin: 0;
  font-size: clamp(17px, 2vw, 20px);
  font-weight: 800;
  color: var(--fg);
}
.page-contact .case-text {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}
.page-contact .inline-note {
  margin: clamp(1.4rem, 3.4vw, 2rem) 0 0;
  padding-left: 1rem;
  border-left: 2px solid var(--accent);
  font-size: 15px;
  line-height: 1.8;
  color: var(--fg);
  opacity: .88;
}
.page-contact .inline-note a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 26, .45);
}

/* 准备清单 */
.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: .6rem;
}
.page-contact .check-item {
  display: flex;
  align-items: center;
  gap: clamp(.75rem, 2vw, 1.1rem);
  padding: .95rem clamp(1rem, 2.4vw, 1.35rem);
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  cursor: pointer;
  transition: border-color .28s var(--ease), background .28s var(--ease);
}
.page-contact .check-item:hover {
  border-color: var(--line-strong);
}
.page-contact .check-item input {
  appearance: none;
  -webkit-appearance: none;
  flex: none;
  width: 20px;
  height: 20px;
  margin: 0;
  border: 1px solid var(--line-strong);
  border-radius: 2px;
  background: transparent;
  display: grid;
  place-content: center;
  cursor: pointer;
}
.page-contact .check-item input::after {
  content: "";
  width: 10px;
  height: 5px;
  margin-top: -3px;
  border-left: 2px solid var(--signal);
  border-bottom: 2px solid var(--signal);
  transform: rotate(-45deg) scale(.35);
  opacity: 0;
  transition: opacity .22s var(--ease), transform .22s var(--ease);
}
.page-contact .check-item input:checked::after {
  opacity: 1;
  transform: rotate(-45deg) scale(1);
}
.page-contact .check-item:has(input:checked) {
  border-color: rgba(184, 255, 74, .42);
  background: rgba(22, 57, 92, .5);
}
.page-contact .check-num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--muted);
}
.page-contact .check-text {
  font-size: 15px;
  line-height: 1.65;
  color: var(--muted);
  transition: color .28s var(--ease);
}
.page-contact .check-item:has(input:checked) .check-text {
  color: var(--fg);
}
.page-contact .check-note {
  margin: clamp(1.2rem, 2.8vw, 1.6rem) 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
}
.page-contact .check-note strong {
  color: var(--fg);
  font-weight: 700;
}
.page-contact .check-note a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 26, .45);
}

/* 联系方式 */
.page-contact .channel-panel {
  display: grid;
  gap: clamp(1.4rem, 4vw, 2.4rem);
  padding: clamp(1.4rem, 4vw, 2.6rem);
}
.page-contact .channel {
  display: grid;
  gap: .45rem;
  align-content: start;
}
.page-contact .channel-key {
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--muted);
}
.page-contact .channel-val {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(17px, 2.6vw, 27px);
  font-weight: 600;
  line-height: 1.25;
  color: var(--fg);
  overflow-wrap: anywhere;
}
.page-contact .channel-hint {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}
.page-contact .channel-actions {
  margin-top: .35rem;
}
.page-contact .copy-btn.is-copied {
  border-color: var(--signal);
  color: var(--signal);
}
.page-contact .channel-note {
  margin: clamp(1.2rem, 3vw, 1.7rem) 0 0;
  max-width: 68ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

/* 合作与资料互换 */
.page-contact .prose {
  margin: 0 0 1.1rem;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.8;
  color: var(--muted);
}
.page-contact .prose:last-child {
  margin-bottom: 0;
}
.page-contact .partner-aside {
  display: grid;
  gap: .75rem;
  align-content: start;
}
.page-contact .partner-figure {
  display: flex;
  align-items: baseline;
  gap: .7rem;
  padding: .85rem 1rem;
  background: var(--ink-1);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}
.page-contact .partner-num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(24px, 3.4vw, 34px);
  font-weight: 700;
  line-height: 1;
  color: var(--fg);
}
.page-contact .partner-label {
  font-size: 13px;
  color: var(--muted);
}
.page-contact .partner-note {
  margin: .35rem 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}
.page-contact .partner-note a {
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 106, 26, .45);
}

/* 收尾窄条 */
.page-contact .contact-footnote {
  margin-top: clamp(3rem, 8vw, 6rem);
  padding-block: clamp(1.5rem, 4vw, 2.25rem);
  background: var(--ink-0);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-contact .footnote-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: .5rem 1.75rem;
}
.page-contact .footnote-label {
  flex: none;
  font-size: 11px;
  letter-spacing: .18em;
  color: var(--accent);
}
.page-contact .footnote-addr {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}
.page-contact .footnote-icp {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--fg);
  opacity: .7;
}

/* 浮动返回入口 */
.page-contact .float-back {
  position: fixed;
  right: clamp(.75rem, 2.5vw, 1.5rem);
  bottom: clamp(.75rem, 2.5vw, 1.5rem);
  z-index: 40;
  text-decoration: none;
  background: var(--ink-1);
  backdrop-filter: blur(8px);
}

/* 断点 */
@media (min-width: 780px) {
  .page-contact .channel-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 820px) {
  .page-contact .triage-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }
  .page-contact .triage-card:nth-child(2) {
    margin-top: 1.75rem;
  }
  .page-contact .triage-card:nth-child(3) {
    margin-top: 3.5rem;
  }
}

@media (min-width: 900px) {
  .page-contact .hero-aside {
    margin-top: .4rem;
  }
  .page-contact .chapter-head {
    grid-template-columns: 92px minmax(0, 6fr) minmax(0, 4fr);
    column-gap: 2rem;
    align-items: start;
  }
  .page-contact .chapter-desc {
    margin-top: .15rem;
  }
}

@media (max-width: 520px) {
  .page-contact .float-back {
    font-size: 12px;
    padding: .5rem .7rem;
  }
  .page-contact .footnote-inner {
    gap: .4rem .9rem;
  }
}
<<<END>>>