.page-contact {
  --pc-gap: clamp(28px, 4vw, 56px);
  --pc-pad: clamp(40px, 6vw, 84px);
  --pc-line: rgba(62, 85, 102, 0.55);
  background: var(--ink-950);
  color: var(--text-primary);
}

.page-contact .section {
  padding-block: var(--pc-pad);
}

.page-contact .contact-block__head {
  max-width: 62ch;
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-contact .contact-block__title {
  margin: 10px 0 0;
  font-size: clamp(27px, 4.4vw, 50px);
  line-height: 1.07;
  letter-spacing: -0.02em;
  font-weight: 800;
  color: var(--text-primary);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, var(--pc-line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--pc-line) 1px, transparent 1px);
  background-size: 88px 88px;
  opacity: 0.22;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 72%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 72%);
  pointer-events: none;
}

.page-contact .contact-hero .wrap {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__title {
  margin: clamp(16px, 2.4vw, 28px) 0 0;
  font-weight: 900;
  font-size: clamp(42px, 9vw, 104px);
  line-height: 0.94;
  letter-spacing: -0.035em;
}

.page-contact .contact-hero__title em {
  font-style: normal;
  color: var(--ember-500);
}

.page-contact .contact-hero__lede {
  margin-top: clamp(18px, 2.6vw, 30px);
  max-width: 36em;
}

.page-contact .contact-hero__facts {
  list-style: none;
  margin: clamp(26px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--pc-line);
  border-top: 1px solid var(--pc-line);
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .contact-hero__facts li {
  background: var(--ink-950);
  padding: 16px clamp(14px, 2vw, 22px);
  font-size: 14px;
  line-height: 1.65;
  color: var(--text-muted);
}

.page-contact .contact-hero__facts .mono {
  display: block;
  font-size: 15px;
  color: var(--ember-300);
  margin-bottom: 4px;
  letter-spacing: 0.02em;
}

/* ---------- 联系渠道 ---------- */

.page-contact .contact-channels {
  background: var(--pitch-900);
}

.page-contact .channels {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .channels__lead {
  border-top: 1px solid var(--pc-line);
  padding-top: clamp(18px, 2.4vw, 28px);
}

.page-contact .channels__label {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.22em;
  color: var(--steel-400);
  margin-bottom: 18px;
}

.page-contact .channels__k {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.14em;
  color: var(--steel-400);
}

.page-contact .channels__phone {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: clamp(30px, 7vw, 56px);
  line-height: 1;
  letter-spacing: -0.02em;
  color: var(--ember-500);
  word-break: break-word;
}

.page-contact .channels__hint {
  margin: 16px 0 0;
  max-width: 30em;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-contact .channels__mail {
  margin: clamp(24px, 3vw, 36px) 0 0;
  border-top: 1px solid var(--pc-line);
}

.page-contact .channels__mail > div {
  padding: 16px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .channels__mail dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.14em;
  color: var(--steel-400);
  margin-bottom: 6px;
}

.page-contact .channels__mail dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.6vw, 20px);
  line-height: 1.4;
  color: var(--text-primary);
  overflow-wrap: anywhere;
}

.page-contact .channels__side {
  display: grid;
  align-content: start;
}

.page-contact .channels__figure {
  margin: 0;
  border: 1px solid var(--pc-line);
}

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

.page-contact .channels__panel {
  border: 1px solid var(--pc-line);
  border-top: none;
  background: var(--carbon-800);
  padding: clamp(20px, 3vw, 28px);
}

.page-contact .channels__panel-k {
  margin: 0;
  font-size: 11.5px;
  letter-spacing: 0.18em;
  color: var(--steel-400);
}

.page-contact .channels__addr {
  margin: 10px 0 0;
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.65;
  color: var(--text-primary);
}

.page-contact .channels__addr-note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--pc-line);
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--text-muted);
}

/* ---------- 反馈类型 ---------- */

.page-contact .contact-triage {
  background: var(--ink-950);
}

.page-contact .triage {
  border: 1px solid var(--pc-line);
  background: var(--carbon-800);
}

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

.page-contact .triage__tabs {
  display: flex;
  overflow-x: auto;
  background: var(--ink-950);
  border-bottom: 1px solid var(--pc-line);
  scrollbar-width: thin;
}

.page-contact .triage__tab {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  padding: 15px clamp(14px, 2vw, 24px);
  font-size: 14px;
  color: var(--steel-400);
  white-space: nowrap;
  cursor: pointer;
  border-right: 1px solid var(--pc-line);
  transition: color 160ms var(--ease), background 160ms var(--ease);
}

.page-contact .triage__tab .mono {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--steel-700);
}

.page-contact .triage__tab:hover {
  color: var(--text-primary);
}

.page-contact #triage-fix:checked ~ .triage__tabs [for="triage-fix"],
.page-contact #triage-data:checked ~ .triage__tabs [for="triage-data"],
.page-contact #triage-ux:checked ~ .triage__tabs [for="triage-ux"],
.page-contact #triage-coop:checked ~ .triage__tabs [for="triage-coop"] {
  color: var(--text-primary);
  background: var(--carbon-800);
  box-shadow: inset 0 -3px 0 var(--ember-500);
}

.page-contact .triage__panels {
  padding: clamp(20px, 3.2vw, 40px);
}

.page-contact .triage__panel {
  display: none;
}

.page-contact #triage-fix:checked ~ .triage__panels .triage__panel--fix,
.page-contact #triage-data:checked ~ .triage__panels .triage__panel--data,
.page-contact #triage-ux:checked ~ .triage__panels .triage__panel--ux,
.page-contact #triage-coop:checked ~ .triage__panels .triage__panel--coop {
  display: block;
}

.page-contact .triage__panel h3 {
  margin: 0;
  font-size: clamp(19px, 2.6vw, 26px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--text-primary);
}

.page-contact .triage__panel > p {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--text-muted);
}

.page-contact .triage__prep {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--pc-line);
  border: 1px solid var(--pc-line);
}

.page-contact .triage__prep li {
  display: flex;
  align-items: baseline;
  gap: 10px;
  background: var(--carbon-800);
  padding: 13px 16px;
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-primary);
}

.page-contact .triage__prep .mono {
  flex: 0 0 auto;
  font-size: 11.5px;
  color: var(--ember-500);
  letter-spacing: 0.08em;
}

.page-contact .triage__panel .triage__follow {
  margin: 18px 0 0;
  padding-left: 12px;
  border-left: 2px solid var(--ember-500);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.75;
  letter-spacing: 0.01em;
  color: var(--steel-400);
  overflow-wrap: anywhere;
}

/* ---------- 响应节奏 ---------- */

.page-contact .contact-response {
  background: var(--pitch-900);
}

.page-contact .response {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .response__quick {
  list-style: none;
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 1px;
  background: var(--pc-line);
  border: 1px solid var(--pc-line);
}

.page-contact .response__quick li {
  flex: 1 1 160px;
  background: var(--pitch-900);
  padding: 14px 16px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted);
}

.page-contact .response__quick .mono {
  display: block;
  margin-bottom: 4px;
  font-size: 15px;
  color: var(--ember-300);
}

.page-contact .response__steps {
  list-style: none;
  margin: clamp(22px, 3vw, 32px) 0 0;
  padding: 0;
  counter-reset: step;
}

.page-contact .response__steps li {
  position: relative;
  padding: 15px 0 15px 46px;
  border-top: 1px solid var(--pc-line);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-contact .response__steps li:last-child {
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .response__steps li::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 15px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ember-500);
}

.page-contact .response__steps strong {
  display: block;
  margin-bottom: 3px;
  font-size: 15.5px;
  color: var(--text-primary);
}

.page-contact .response__figure {
  margin: 0;
  border: 1px solid var(--pc-line);
}

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

/* ---------- 提交前清单 ---------- */

.page-contact .contact-checklist {
  background: var(--paper-100);
  color: var(--ink-950);
}

.page-contact .contact-checklist .eyebrow {
  color: var(--steel-700);
}

.page-contact .contact-checklist .contact-block__title {
  color: var(--ink-950);
  max-width: 24em;
}

.page-contact .checklist {
  list-style: none;
  margin: clamp(24px, 4vw, 44px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: rgba(62, 85, 102, 0.32);
  border-top: 1px solid rgba(62, 85, 102, 0.42);
  border-bottom: 1px solid rgba(62, 85, 102, 0.42);
}

.page-contact .checklist > li {
  background: var(--paper-100);
  padding: clamp(18px, 2.6vw, 26px);
}

.page-contact .checklist > li h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin: 0 0 8px;
  font-size: 17px;
  letter-spacing: -0.01em;
  color: var(--ink-950);
}

.page-contact .checklist > li h3 .mono {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ember-500);
}

.page-contact .checklist > li p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--steel-700);
}

.page-contact .checklist__foot {
  margin: clamp(18px, 3vw, 26px) 0 0;
  padding-left: 14px;
  border-left: 3px solid var(--ember-500);
  max-width: 52ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--steel-700);
}

/* ---------- 合作 ---------- */

.page-contact .contact-partner {
  background: var(--ink-950);
}

.page-contact .partner {
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .partner__note {
  margin: 16px 0 0;
  max-width: 32em;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-muted);
}

.page-contact .partner__list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--pc-line);
  align-self: start;
}

.page-contact .partner__list li {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--pc-line);
}

.page-contact .partner__list > li > .mono {
  font-size: 11.5px;
  letter-spacing: 0.08em;
  color: var(--ember-500);
}

.page-contact .partner__list strong {
  display: block;
  margin-bottom: 5px;
  font-size: 16px;
  color: var(--text-primary);
}

.page-contact .partner__list p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--text-muted);
}

/* ---------- 收束 ---------- */

.page-contact .contact-next {
  background: var(--pitch-900);
}

.page-contact .contact-next__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 30px);
}

.page-contact .contact-next__links {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-contact .contact-next__links a {
  color: var(--ember-300);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-next__links a:hover {
  color: var(--ember-500);
}

/* ---------- 响应式 ---------- */

@media (min-width: 680px) {
  .page-contact .triage__prep {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-contact .channels {
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    gap: clamp(40px, 5vw, 78px);
    align-items: start;
  }

  .page-contact .response {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }

  .page-contact .partner {
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(36px, 5vw, 72px);
    align-items: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .triage__tab {
    transition: none;
  }
}
<<<END>>>