.page-contact {
  --c-gap: clamp(16px, 3.2vw, 30px);
  --c-radius: 18px;
  --c-panel: rgba(12, 42, 34, .72);
  --c-line: rgba(201, 169, 106, .22);
  --c-cyan-soft: rgba(53, 242, 197, .12);
  position: relative;
  display: block;
  padding: clamp(18px, 3.6vw, 34px) 0 clamp(44px, 7vw, 84px);
  color: var(--text-body);
  background-color: var(--ink);
  background-image:
    repeating-linear-gradient(0deg, rgba(143, 167, 157, .07) 0 1px, transparent 1px 48px),
    repeating-linear-gradient(90deg, rgba(143, 167, 157, .07) 0 1px, transparent 1px 48px);
  overflow-x: hidden;
}

.page-contact .contact-shell {
  width: 100%;
  max-width: var(--shell);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-contact .crumb-sep {
  margin-inline: 8px;
  color: var(--gold);
}

.page-contact .breadcrumb {
  color: var(--mist);
  font-size: 13px;
  letter-spacing: .02em;
}

.page-contact .breadcrumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

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

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 44px);
  align-items: start;
  padding: clamp(20px, 3.4vw, 40px) 0 clamp(30px, 5vw, 56px);
}

.page-contact .hero-copy .eyebrow {
  color: var(--gold);
  letter-spacing: .18em;
}

.page-contact .hero-copy h1 {
  margin: 10px 0 16px;
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(28px, 5vw, 46px);
  line-height: 1.22;
  color: var(--paper);
  letter-spacing: -.01em;
}

.page-contact .hero-copy .lede {
  margin: 0;
  max-width: 46ch;
  font-size: 16px;
  line-height: 28px;
  color: var(--text-body);
}

.page-contact .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.page-contact .hero-pips {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin: 26px 0 0;
  padding: 18px 0 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-contact .hero-pips li {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.page-contact .pip-num {
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 700;
  color: var(--cyan);
  font-variant-numeric: tabular-nums;
  text-shadow: 0 0 12px rgba(53, 242, 197, .3);
}

.page-contact .pip-text {
  font-size: 13px;
  line-height: 20px;
  color: var(--mist);
}

.page-contact .hero-card {
  border-radius: var(--c-radius);
  border: 1px solid var(--c-line);
  padding: clamp(18px, 3vw, 26px);
  box-shadow: 0 18px 44px rgba(0, 0, 0, .38);
}

.page-contact .card-kicker {
  margin: 0 0 6px;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .18em;
  color: var(--cyan);
  text-transform: uppercase;
}

.page-contact .card-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 10px;
  padding: 14px 0;
  border-bottom: 1px dashed rgba(242, 232, 213, .16);
}

.page-contact .card-row--stack {
  align-items: flex-start;
  flex-direction: column;
  gap: 4px;
  border-bottom: 0;
}

.page-contact .card-row-label {
  flex: 0 0 100%;
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--gold);
}

.page-contact .card-row--stack .card-row-label {
  flex: 0 0 auto;
}

.page-contact .card-row-value {
  font-size: 15px;
  line-height: 24px;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .card-mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: .01em;
}

.page-contact .copy-btn {
  margin-left: auto;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--cyan);
  background: transparent;
  border: 1px solid rgba(53, 242, 197, .42);
  border-radius: var(--radius-capsule);
  cursor: pointer;
  transition: background var(--fast) var(--ease), color var(--fast) var(--ease);
}

.page-contact .copy-btn:hover {
  background: rgba(53, 242, 197, .14);
}

.page-contact .copy-btn:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .copy-btn[data-copied] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .card-foot {
  margin: 14px 0 10px;
  font-size: 13px;
  line-height: 22px;
  color: var(--mist);
}

.page-contact .card-link {
  display: inline-block;
  font-size: 14px;
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 159, 69, .4);
  transition: border-color var(--fast) var(--ease);
}

.page-contact .card-link:hover,
.page-contact .card-link:focus-visible {
  border-bottom-color: var(--amber);
}

/* ---------- 章节通用 ---------- */
.page-contact .section-head {
  max-width: 62ch;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.page-contact .section-index {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .28em;
  color: var(--gold);
}

.page-contact .section-title {
  margin: 0 0 10px;
  font-family: var(--font-serif);
  font-weight: 600;
  font-size: clamp(22px, 3.4vw, 32px);
  line-height: 1.3;
  color: var(--paper);
}

.page-contact .section-sub {
  margin: 0;
  font-size: 15px;
  line-height: 26px;
  color: var(--mist);
}

/* ---------- 联系渠道 ---------- */
.page-contact .channel-section {
  margin-top: clamp(26px, 4vw, 46px);
  padding: clamp(30px, 5vw, 56px) 0;
  background:
    radial-gradient(ellipse at 82% 12%, rgba(53, 242, 197, .1), transparent 58%),
    linear-gradient(180deg, rgba(12, 42, 34, .9), rgba(6, 26, 21, .96));
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-contact .img-frame {
  margin: 0;
  overflow: hidden;
  border-radius: var(--c-radius);
  border: 1px solid var(--c-line);
  background: var(--ink-2);
}

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

.page-contact .channel-banner {
  margin-bottom: clamp(18px, 3vw, 28px);
}

.page-contact .channel-banner img {
  aspect-ratio: 12 / 7;
}

.page-contact .media-caption {
  padding: 10px 14px;
  font-size: 12px;
  line-height: 20px;
  color: var(--mist);
  background: rgba(4, 18, 14, .6);
}

.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--c-gap);
}

.page-contact .channel-card {
  position: relative;
  padding: 22px 20px 24px;
  border-radius: var(--c-radius);
  border: 1px solid var(--c-line);
  background: linear-gradient(160deg, rgba(12, 42, 34, .92), rgba(4, 18, 14, .82));
  transition: border-color var(--fast) var(--ease), transform var(--fast) var(--ease);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  inset: auto 20px 0 20px;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), transparent 78%);
  opacity: .5;
}

.page-contact .channel-card:hover {
  border-color: rgba(53, 242, 197, .45);
  transform: translateY(-2px);
}

.page-contact .channel-icon {
  margin: 0 0 10px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  font-size: 16px;
  color: var(--ink);
  background: var(--cyan);
  border-radius: 10px;
}

.page-contact .channel-name {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-size: 18px;
  font-weight: 600;
  color: var(--paper);
}

.page-contact .channel-use {
  margin: 0 0 12px;
  font-size: 14px;
  line-height: 24px;
  color: var(--text-body);
}

.page-contact .channel-value {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 24px;
  color: var(--amber);
  word-break: break-word;
}

.page-contact .channel-note {
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 20px;
  color: var(--mist);
}

/* ---------- 反馈准备 ---------- */
.page-contact .feedback-section {
  padding: clamp(30px, 5vw, 60px) 0;
}

.page-contact .feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(22px, 4vw, 42px);
  align-items: start;
}

.page-contact .prep-visual img {
  aspect-ratio: 12 / 6.5;
}

.page-contact .prep-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--c-line);
}

.page-contact .prep-item {
  border-bottom: 1px solid rgba(201, 169, 106, .14);
}

.page-contact .prep-item label {
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  align-items: start;
  padding: 14px 0;
  cursor: pointer;
}

.page-contact .prep-item input {
  position: absolute;
  opacity: 0;
  width: 1px;
  height: 1px;
}

.page-contact .prep-box {
  width: 20px;
  height: 20px;
  margin-top: 2px;
  border: 1px solid rgba(201, 169, 106, .55);
  border-radius: 5px;
  background: rgba(4, 18, 14, .6);
  transition: background var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-contact .prep-item input:checked + .prep-box {
  background: var(--cyan);
  border-color: var(--cyan);
  box-shadow: inset 0 0 0 3px var(--ink);
}

.page-contact .prep-item input:focus-visible + .prep-box {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .prep-text {
  font-size: 14px;
  line-height: 24px;
  color: var(--text-body);
}

.page-contact .prep-text strong {
  display: block;
  margin-bottom: 2px;
  font-weight: 600;
  color: var(--paper);
}

.page-contact .prep-tail {
  margin: 18px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--amber);
  font-size: 14px;
  line-height: 24px;
  color: var(--mist);
}

.page-contact .prep-tail a {
  color: var(--amber);
  text-decoration: none;
  border-bottom: 1px solid rgba(255, 159, 69, .45);
}

.page-contact .prep-tail a:hover,
.page-contact .prep-tail a:focus-visible {
  border-bottom-color: var(--amber);
}

/* ---------- 合作与纠错 ---------- */
.page-contact .coop-section {
  padding: clamp(30px, 5vw, 56px) 0;
  background: linear-gradient(180deg, rgba(12, 42, 34, .55), rgba(6, 26, 21, .2));
  border-top: 1px solid var(--c-line);
}

.page-contact .coop {
  position: relative;
  display: grid;
  gap: 16px;
}

.page-contact .coop-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .coop-labels {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .coop-label {
  padding: 8px 16px;
  font-size: 14px;
  color: var(--text-body);
  background: rgba(12, 42, 34, .8);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-capsule);
  cursor: pointer;
  transition: color var(--fast) var(--ease), background var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-contact .coop-label:hover {
  border-color: rgba(53, 242, 197, .5);
  color: var(--cyan);
}

.page-contact #coop-media:checked ~ .coop-labels label[for="coop-media"],
.page-contact #coop-data:checked ~ .coop-labels label[for="coop-data"],
.page-contact #coop-campus:checked ~ .coop-labels label[for="coop-campus"],
.page-contact #coop-fix:checked ~ .coop-labels label[for="coop-fix"] {
  color: var(--ink);
  background: var(--cyan);
  border-color: var(--cyan);
}

.page-contact .coop-input:focus-visible ~ .coop-labels label[for="coop-media"],
.page-contact #coop-data:focus-visible ~ .coop-labels label[for="coop-data"],
.page-contact #coop-campus:focus-visible ~ .coop-labels label[for="coop-campus"],
.page-contact #coop-fix:focus-visible ~ .coop-labels label[for="coop-fix"] {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

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

.page-contact .coop-panel {
  display: none;
  padding: clamp(20px, 3.4vw, 30px);
  border-radius: var(--c-radius);
  border: 1px solid var(--c-line);
  background: linear-gradient(150deg, rgba(12, 42, 34, .9), rgba(4, 18, 14, .78));
  box-shadow: inset 0 1px 0 rgba(242, 232, 213, .06);
}

.page-contact #coop-media:checked ~ .coop-panels .coop-panel:nth-child(1),
.page-contact #coop-data:checked ~ .coop-panels .coop-panel:nth-child(2),
.page-contact #coop-campus:checked ~ .coop-panels .coop-panel:nth-child(3),
.page-contact #coop-fix:checked ~ .coop-panels .coop-panel:nth-child(4) {
  display: block;
}

.page-contact .coop-panel-title {
  margin: 0 0 12px;
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 600;
  line-height: 30px;
  color: var(--paper);
}

.page-contact .coop-panel p {
  margin: 0 0 12px;
  font-size: 15px;
  line-height: 27px;
  color: var(--text-body);
}

.page-contact .coop-panel a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 242, 197, .4);
}

.page-contact .coop-meta {
  margin: 0 !important;
  padding-top: 12px;
  border-top: 1px dashed rgba(242, 232, 213, .16);
  font-size: 13px !important;
  line-height: 22px !important;
  color: var(--gold) !important;
}

/* ---------- 回复时间 ---------- */
.page-contact .service-section {
  padding: clamp(34px, 5.4vw, 64px) 0 0;
}

.page-contact .service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(20px, 3.4vw, 36px);
  padding-top: clamp(24px, 4vw, 38px);
  border-top: 1px solid var(--c-line);
}

.page-contact .service-main p {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 27px;
  color: var(--text-body);
}

.page-contact .service-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}

.page-contact .service-side {
  display: grid;
  gap: 14px;
}

.page-contact .service-card {
  padding: 20px;
  border-radius: var(--c-radius);
  border: 1px solid var(--c-line);
  background: var(--c-panel);
}

.page-contact .service-card--paper {
  background: var(--paper);
  border-color: rgba(27, 23, 18, .16);
}

.page-contact .service-card-title {
  margin: 0 0 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  color: var(--cyan);
}

.page-contact .service-card--paper .service-card-title {
  color: var(--brown);
}

.page-contact .service-steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
  counter-reset: step;
}

.page-contact .service-steps li {
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 10px;
  align-items: baseline;
  font-size: 13px;
  line-height: 22px;
  color: var(--text-body);
}

.page-contact .step-no {
  font-size: 12px;
  color: var(--gold);
}

.page-contact .service-links {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .service-links a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  line-height: 22px;
  color: var(--brown);
  text-decoration: none;
  border-bottom: 1px solid rgba(27, 23, 18, .16);
  transition: color var(--fast) var(--ease), border-color var(--fast) var(--ease);
}

.page-contact .service-links a:hover,
.page-contact .service-links a:focus-visible {
  color: var(--alert);
  border-bottom-color: var(--alert);
}

@media (min-width: 720px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .feedback-grid {
    grid-template-columns: minmax(0, .92fr) minmax(0, 1fr);
    align-items: center;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, .88fr);
    align-items: center;
  }

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

  .page-contact .service-grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    align-items: start;
  }

  .page-contact .feedback-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.02fr);
    gap: clamp(30px, 4.4vw, 56px);
  }
}

@media (max-width: 419px) {
  .page-contact .hero-pips {
    grid-template-columns: 1fr;
  }

  .page-contact .card-row {
    gap: 4px;
  }

  .page-contact .copy-btn {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .copy-btn,
  .page-contact .coop-label,
  .page-contact .prep-box {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
  }
}
<<<END>>>