.page-contact {
  --contact-line: rgba(174, 184, 182, 0.24);
  --contact-card: #1a2224;
  --contact-notch: #0b0f10;
  padding-bottom: 88px;
  color: var(--mist);
}

.page-contact .section {
  padding: 56px 0;
}

.page-contact .section--tight {
  padding: 40px 0;
}

.page-contact .section-head {
  margin-bottom: 28px;
}

.page-contact .section-head h2,
.page-contact .contact-prep__intro h2,
.page-contact .contact-sla__head h2,
.page-contact .contact-stand__copy h2,
.page-contact .contact-partner__inner h2 {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 5vw, 2.35rem);
  line-height: 1.16;
  letter-spacing: 0.05em;
  margin: 10px 0 0;
  color: var(--mist);
}

.page-contact .section-sub {
  margin: 12px 0 0;
  max-width: 62ch;
  color: var(--chalk);
  line-height: 1.75;
}

/* ---------- 首屏拼贴 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: 26px;
  padding: 26px 0 8px;
}

.page-contact .contact-hero__lead h1 {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 7.6vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: 0.05em;
  font-weight: 700;
  margin: 12px 0 16px;
  max-width: 18ch;
}

.page-contact .contact-hero__intro {
  margin: 0;
  max-width: 60ch;
  color: var(--chalk);
  line-height: 1.8;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.page-contact .contact-hero__board {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
  align-content: start;
}

.page-contact .board-cell {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: var(--concrete);
  border: 1px solid var(--contact-line);
  border-radius: 12px 12px 12px 4px;
  position: relative;
  overflow: hidden;
}

.page-contact .board-cell--wide {
  grid-column: 1 / -1;
  background: linear-gradient(120deg, rgba(40, 240, 184, 0.14), rgba(36, 43, 45, 0.92) 62%);
}

.page-contact .board-cell--pulse {
  border-color: rgba(255, 90, 60, 0.5);
  background: linear-gradient(160deg, rgba(255, 90, 60, 0.16), rgba(36, 43, 45, 0.95));
}

.page-contact .board-cell--pulse::after {
  content: "";
  position: absolute;
  top: 12px;
  right: 12px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--signal);
  animation: contact-breathe 3.4s var(--ease) infinite;
}

@keyframes contact-breathe {
  0%, 100% { opacity: 0.35; transform: scale(0.85); }
  50% { opacity: 1; transform: scale(1.15); }
}

.page-contact .board-cell__num {
  font-size: clamp(0.95rem, 3.6vw, 1.15rem);
  font-weight: 600;
  color: var(--mist);
  letter-spacing: 0.02em;
}

.page-contact .board-cell--wide .board-cell__num {
  font-size: clamp(1.1rem, 4.6vw, 1.5rem);
  color: var(--mint);
}

.page-contact .board-cell__label {
  font-size: 0.8rem;
  color: var(--chalk);
  letter-spacing: 0.06em;
}

/* ---------- 联系入口票根 ---------- */
.page-contact .contact-reach__grid {
  display: grid;
  gap: 22px;
}

.page-contact .ticket-stack {
  display: grid;
  gap: 14px;
}

.page-contact .ticket {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  background: var(--contact-card);
  border: 1px solid var(--contact-line);
  border-radius: 14px;
  overflow: hidden;
}

.page-contact .ticket__stub {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px 0;
  background:
    radial-gradient(circle at 100% 0, var(--contact-notch) 6px, transparent 6.5px),
    radial-gradient(circle at 100% 100%, var(--contact-notch) 6px, transparent 6.5px),
    linear-gradient(180deg, rgba(40, 240, 184, 0.16), rgba(15, 59, 51, 0.18));
  border-right: 1px dashed var(--hairline-strong);
}

.page-contact .ticket__stub .mono {
  writing-mode: vertical-rl;
  font-size: 0.72rem;
  letter-spacing: 0.24em;
  color: var(--mint);
}

.page-contact .ticket__body {
  padding: 18px 16px 18px 18px;
  display: grid;
  gap: 10px;
  justify-items: start;
  min-width: 0;
}

.page-contact .ticket__title {
  font-size: 0.86rem;
  letter-spacing: 0.16em;
  color: var(--chalk);
  margin: 0;
  font-weight: 500;
}

.page-contact .ticket__value {
  margin: 0;
  font-size: clamp(0.95rem, 4vw, 1.2rem);
  font-weight: 600;
  color: var(--mist);
  word-break: break-word;
  overflow-wrap: anywhere;
}

.page-contact .ticket--slim .ticket__value {
  font-size: clamp(0.9rem, 3.6vw, 1.05rem);
  line-height: 1.6;
}

.page-contact .ticket__note {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--chalk);
  max-width: 46ch;
}

.page-contact .ticket__body .btn {
  margin-top: 4px;
  font-size: 0.82rem;
  padding: 8px 16px;
}

.page-contact .contact-reach__media {
  align-self: start;
}

.page-contact .contact-reach__media figcaption {
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 分类切换 ---------- */
.page-contact .classifier {
  display: grid;
  gap: 18px;
  border-radius: 18px;
}

.page-contact .classifier:focus-within .classifier__tabs {
  box-shadow: 0 0 0 1px var(--mint);
}

.page-contact .classifier__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  border-radius: 12px;
}

.page-contact .topic-tab {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  font-size: 0.86rem;
  line-height: 1.2;
  color: var(--chalk);
  background: var(--concrete);
  border: 1px solid var(--contact-line);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}

.page-contact .topic-tab .mono {
  font-size: 0.72rem;
  color: var(--steel);
}

.page-contact .topic-tab:hover {
  border-color: var(--hairline-strong);
  color: var(--mist);
}

.page-contact .classifier__panels {
  border-top: 1px solid var(--contact-line);
  padding-top: 22px;
}

.page-contact .topic-panel {
  display: none;
  gap: 14px;
}

.page-contact .topic-panel h3 {
  font-family: var(--font-display);
  font-size: clamp(1.2rem, 4.4vw, 1.6rem);
  letter-spacing: 0.05em;
  margin: 0;
  color: var(--mist);
}

.page-contact .topic-panel > p {
  margin: 0;
  color: var(--chalk);
  line-height: 1.78;
  max-width: 64ch;
}

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

.page-contact .topic-panel__list li {
  position: relative;
  padding-left: 22px;
  font-size: 0.9rem;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .topic-panel__list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--mint);
}

.page-contact .topic-panel__link {
  justify-self: start;
  font-size: 0.88rem;
  color: var(--mint);
  text-decoration: none;
  border-bottom: 1px solid rgba(40, 240, 184, 0.45);
  padding-bottom: 2px;
}

.page-contact .topic-panel__link:hover {
  color: var(--mist);
  border-bottom-color: var(--mist);
}

.page-contact #topic-subscribe:checked ~ .classifier__tabs .topic-tab[for="topic-subscribe"],
.page-contact #topic-score:checked ~ .classifier__tabs .topic-tab[for="topic-score"],
.page-contact #topic-device:checked ~ .classifier__tabs .topic-tab[for="topic-device"],
.page-contact #topic-stand:checked ~ .classifier__tabs .topic-tab[for="topic-stand"],
.page-contact #topic-partner:checked ~ .classifier__tabs .topic-tab[for="topic-partner"] {
  background: var(--mint);
  border-color: var(--mint);
  color: var(--ink);
  font-weight: 600;
}

.page-contact #topic-subscribe:checked ~ .classifier__tabs .topic-tab[for="topic-subscribe"] .mono,
.page-contact #topic-score:checked ~ .classifier__tabs .topic-tab[for="topic-score"] .mono,
.page-contact #topic-device:checked ~ .classifier__tabs .topic-tab[for="topic-device"] .mono,
.page-contact #topic-stand:checked ~ .classifier__tabs .topic-tab[for="topic-stand"] .mono,
.page-contact #topic-partner:checked ~ .classifier__tabs .topic-tab[for="topic-partner"] .mono {
  color: rgba(11, 15, 16, 0.62);
}

.page-contact #topic-subscribe:checked ~ .classifier__panels .topic-panel--subscribe,
.page-contact #topic-score:checked ~ .classifier__panels .topic-panel--score,
.page-contact #topic-device:checked ~ .classifier__panels .topic-panel--device,
.page-contact #topic-stand:checked ~ .classifier__panels .topic-panel--stand,
.page-contact #topic-partner:checked ~ .classifier__panels .topic-panel--partner {
  display: grid;
  animation: contact-panel-in 0.24s var(--ease) both;
}

@keyframes contact-panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 提交前准备 ---------- */
.page-contact .contact-prep__grid {
  display: grid;
  gap: 26px;
}

.page-contact .contact-prep__intro > p:last-child {
  margin: 14px 0 0;
  color: var(--chalk);
  line-height: 1.8;
  max-width: 52ch;
}

.page-contact .prep {
  position: relative;
  padding-left: 34px;
}

.page-contact .prep__line {
  position: absolute;
  left: 5px;
  top: 14px;
  bottom: 14px;
  width: 2px;
  height: auto;
}

.page-contact .prep__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
  counter-reset: prep;
}

.page-contact .prep__item {
  position: relative;
  padding: 16px 16px 16px 18px;
  background: var(--contact-card);
  border: 1px solid var(--contact-line);
  border-radius: 4px 14px 14px 14px;
}

.page-contact .prep__item::before {
  content: "";
  position: absolute;
  left: -36px;
  top: 22px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: var(--ink);
  border: 2px solid var(--mint);
}

.page-contact .prep__item:nth-child(2)::before {
  border-color: var(--pulse);
}

.page-contact .prep__item:nth-child(3)::before {
  border-color: var(--pulse);
}

.page-contact .prep__item:nth-child(4)::before {
  border-color: var(--signal);
}

.page-contact .prep__item h3 {
  margin: 0 0 6px;
  font-size: 0.95rem;
  letter-spacing: 0.08em;
  color: var(--mint);
  font-weight: 600;
}

.page-contact .prep__item p {
  margin: 0;
  font-size: 0.88rem;
  line-height: 1.74;
  color: var(--chalk);
}

/* ---------- 回复时效 ---------- */
.page-contact .contact-sla__inner {
  display: grid;
  gap: 26px;
  padding: 26px 20px;
  background: linear-gradient(150deg, rgba(15, 59, 51, 0.6), rgba(36, 43, 45, 0.9));
  border: 1px solid var(--contact-line);
  border-radius: 20px;
}

.page-contact .contact-sla__head > p:last-child {
  margin: 14px 0 0;
  color: var(--chalk);
  line-height: 1.8;
  max-width: 56ch;
}

.page-contact .sla-steps {
  display: grid;
  gap: 0;
}

.page-contact .sla-step {
  position: relative;
  padding: 18px 0 18px 26px;
  border-top: 1px solid var(--contact-line);
}

.page-contact .sla-step:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .sla-step__num {
  position: absolute;
  left: 0;
  top: 20px;
  font-size: 0.72rem;
  color: var(--pulse);
}

.page-contact .sla-step:first-child .sla-step__num {
  top: 2px;
}

.page-contact .sla-step h3 {
  margin: 0 0 6px;
  font-size: 0.98rem;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .sla-step p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.74;
  color: var(--chalk);
}

/* ---------- 看台支持 ---------- */
.page-contact .contact-stand__grid {
  display: grid;
  gap: 24px;
}

.page-contact .contact-stand__media {
  margin: 0;
}

.page-contact .contact-stand__media figcaption {
  font-size: 0.78rem;
  line-height: 1.7;
  color: var(--steel);
}

.page-contact .contact-stand__copy > p {
  color: var(--chalk);
  line-height: 1.8;
  margin: 14px 0 0;
  max-width: 60ch;
}

.page-contact .stand-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .stand-list li {
  position: relative;
  padding-left: 20px;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .stand-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 10px;
  height: 10px;
  border-left: 2px solid var(--mint);
  border-bottom: 2px solid var(--mint);
  transform: rotate(-45deg);
  transform-origin: left top;
}

.page-contact .contact-stand__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

/* ---------- 合作与媒体 ---------- */
.page-contact .contact-partner__inner {
  display: grid;
  gap: 20px;
  padding-top: 26px;
  border-top: 1px solid var(--contact-line);
}

.page-contact .contact-partner__body p {
  margin: 0 0 12px;
  color: var(--chalk);
  line-height: 1.8;
  max-width: 64ch;
}

.page-contact .contact-partner__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 18px;
}

/* ---------- 说明入口 ---------- */
.page-contact .path-grid {
  display: grid;
  gap: 14px;
}

.page-contact .path-card {
  display: grid;
  gap: 8px;
  padding: 20px 18px;
  background: var(--concrete);
  border: 1px solid var(--contact-line);
  border-radius: 16px 16px 16px 4px;
  text-decoration: none;
  color: var(--mist);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease), background 0.2s var(--ease);
}

.page-contact .path-card:hover {
  border-color: var(--mint);
  background: #293133;
  transform: translateY(-2px);
}

.page-contact .path-card__index {
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--pulse);
}

.page-contact .path-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.22rem;
  letter-spacing: 0.05em;
}

.page-contact .path-card p {
  margin: 0;
  font-size: 0.86rem;
  line-height: 1.72;
  color: var(--chalk);
}

.page-contact .path-card__go {
  margin-top: 4px;
  font-size: 0.8rem;
  color: var(--mint);
  letter-spacing: 0.08em;
}

.page-contact .path-card--quiet {
  background: rgba(36, 43, 45, 0.55);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.85fr);
    align-items: start;
    gap: 40px;
    padding-top: 40px;
  }

  .page-contact .contact-hero__board {
    transform: translateY(26px);
    gap: 12px;
  }

  .page-contact .board-cell {
    padding: 18px 16px;
  }

  .page-contact .contact-reach__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 28px;
    align-items: start;
  }

  .page-contact .contact-reach__media {
    transform: translateY(34px);
  }

  .page-contact .ticket {
    grid-template-columns: 62px minmax(0, 1fr);
  }

  .page-contact .ticket__body {
    padding: 20px 22px;
  }

  .page-contact .contact-prep__grid {
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
    gap: 36px;
    align-items: start;
  }

  .page-contact .contact-prep__intro {
    position: sticky;
    top: 96px;
  }

  .page-contact .contact-sla__inner {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    gap: 36px;
    padding: 36px 32px;
  }

  .page-contact .contact-stand__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 36px;
    align-items: center;
  }

  .page-contact .contact-partner__inner {
    grid-template-columns: minmax(0, 0.7fr) minmax(0, 1.3fr);
    gap: 32px;
    align-items: start;
  }

  .page-contact .path-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
  }

  .page-contact .path-card--quiet {
    margin-top: 28px;
  }
}

@media (min-width: 1080px) {
  .page-contact .section {
    padding: 76px 0;
  }

  .page-contact .section--tight {
    padding: 52px 0;
  }

  .page-contact .contact-hero__lead h1 {
    max-width: 16ch;
  }

  .page-contact .classifier {
    grid-template-columns: minmax(0, 0.72fr) minmax(0, 1.28fr);
    gap: 32px;
    align-items: start;
    padding-left: 18px;
    border-left: 1px solid var(--contact-line);
  }

  .page-contact .classifier__tabs {
    flex-direction: column;
    flex-wrap: nowrap;
    gap: 10px;
    border-radius: 0;
  }

  .page-contact .topic-tab {
    justify-content: flex-start;
    border-radius: 4px 12px 12px 4px;
    padding: 14px 18px;
    font-size: 0.92rem;
  }

  .page-contact .classifier__panels {
    border-top: 0;
    padding-top: 0;
  }

  .page-contact .sla-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .sla-step {
    border-top: 0;
    border-left: 1px solid var(--contact-line);
    padding: 0 0 0 20px;
  }

  .page-contact .sla-step:first-child {
    border-left: 0;
    padding-left: 0;
  }

  .page-contact .sla-step__num,
  .page-contact .sla-step:first-child .sla-step__num {
    position: static;
    display: block;
    margin-bottom: 10px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .board-cell--pulse::after,
  .page-contact .path-card,
  .page-contact .topic-tab {
    animation: none;
    transition: none;
  }

  .page-contact #topic-subscribe:checked ~ .classifier__panels .topic-panel--subscribe,
  .page-contact #topic-score:checked ~ .classifier__panels .topic-panel--score,
  .page-contact #topic-device:checked ~ .classifier__panels .topic-panel--device,
  .page-contact #topic-stand:checked ~ .classifier__panels .topic-panel--stand,
  .page-contact #topic-partner:checked ~ .classifier__panels .topic-panel--partner {
    animation: none;
  }
}
<<<END>>>