.page-contact {
  --pc-gap: clamp(20px, 3vw, 36px);
  --pc-block: clamp(40px, 6vw, 76px);
}

.page-contact .breadcrumb {
  padding-top: 20px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  display: grid;
  gap: 32px;
  padding: 20px 0 48px;
}

.page-contact .contact-hero__lead h1 {
  margin: 12px 0 0;
  font-size: clamp(30px, 7vw, 58px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  font-weight: 900;
}

.page-contact .contact-hero__lead .lede {
  margin: 16px 0 0;
  max-width: 34em;
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .hero-list {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  border-bottom: 1px solid var(--line-500);
}

.page-contact .hero-item {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr);
  padding: 16px 0;
  border-top: 1px solid var(--line-500);
  column-gap: 14px;
}

.page-contact .hero-num {
  grid-row: 1 / span 2;
  font-size: 17px;
  line-height: 1.35;
  color: var(--cyan-400);
}

.page-contact .hero-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
}

.page-contact .hero-sum {
  margin-top: 3px;
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-contact .contact-hero__aside {
  display: grid;
  gap: 20px;
  align-content: start;
}

.page-contact .hero-figure {
  margin: 0;
}

.page-contact .hero-figure .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.page-contact .contact-panel {
  background: var(--ink-800);
  border: 1px solid var(--cyan-400);
  padding: clamp(18px, 3vw, 26px);
}

.page-contact .panel__label {
  margin: 0 0 18px;
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--cyan-200);
}

.page-contact .panel__line {
  display: grid;
  gap: 4px;
  margin: 0 0 16px;
}

.page-contact .panel__line:last-of-type {
  margin-bottom: 18px;
}

.page-contact .panel__k {
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}

.page-contact .panel__v {
  font-family: var(--font-mono);
  font-size: clamp(16px, 4.4vw, 26px);
  line-height: 1.25;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-contact .panel__meta {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-500);
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 章节骨架 ---------- */
.page-contact .contact-block {
  padding: var(--pc-block) 0;
  border-top: 1px solid var(--line-500);
}

.page-contact .c-head {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 0 18px;
  align-items: start;
  margin-bottom: clamp(24px, 4vw, 42px);
}

.page-contact .c-head__idx {
  font-size: clamp(26px, 5.5vw, 44px);
  line-height: 1;
  letter-spacing: -0.03em;
  color: var(--cyan-400);
}

.page-contact .c-head__title {
  margin: 0;
  font-size: clamp(21px, 3.4vw, 32px);
  line-height: 1.2;
  letter-spacing: -0.01em;
  font-weight: 800;
  color: var(--text);
}

.page-contact .c-head__sub {
  margin: 10px 0 0;
  max-width: 46ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 合作线折叠 ---------- */
.page-contact .track-acc .accordion__item {
  border-top: 1px solid var(--line-500);
}

.page-contact .track-acc .accordion__item:last-child {
  border-bottom: 1px solid var(--line-500);
}

.page-contact .accordion__trigger {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  gap: 0 16px;
  align-items: center;
  width: 100%;
  padding: 20px 0;
  background: none;
  border: 0;
  text-align: left;
  color: inherit;
  font-family: inherit;
  cursor: pointer;
}

.page-contact .track-num {
  font-size: 14px;
  color: var(--cyan-400);
  align-self: start;
  padding-top: 3px;
}

.page-contact .track-body {
  display: grid;
  gap: 4px;
}

.page-contact .track-name {
  font-size: 17px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  transition: color 0.16s var(--ease);
}

.page-contact .accordion__trigger:hover .track-name {
  color: var(--cyan-200);
}

.page-contact .track-sum {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--muted);
}

.page-contact .track-caret {
  width: 9px;
  height: 9px;
  border-right: 1px solid var(--cyan-400);
  border-bottom: 1px solid var(--cyan-400);
  transform: rotate(45deg);
  transition: transform 0.2s var(--ease);
  align-self: center;
}

.page-contact .accordion__trigger[aria-expanded="true"] .track-caret {
  transform: rotate(-135deg);
}

.page-contact .track-panel {
  padding: 0 0 24px;
}

.page-contact .track-panel > p {
  margin: 0 0 14px;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text);
}

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

.page-contact .track-points li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .track-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 1px;
  background: var(--cyan-400);
}

/* ---------- 联系渠道 ---------- */
.page-contact .channel-grid {
  display: grid;
  border-top: 1px solid var(--line-500);
}

.page-contact .channel {
  display: grid;
  gap: 6px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-500);
}

.page-contact .channel__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--cyan-200);
}

.page-contact .channel__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 2.4vw, 19px);
  line-height: 1.4;
  color: var(--text);
  overflow-wrap: anywhere;
}

.page-contact .channel__note {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 邮件清单 ---------- */
.page-contact .checklist {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line-500);
  border: 1px solid var(--line-500);
}

.page-contact .check-item {
  position: relative;
  background: var(--ink-900);
}

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

.page-contact .check-label {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px;
  cursor: pointer;
}

.page-contact .check-box {
  position: relative;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  border: 1px solid var(--line-500);
  transition: background 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .check-box::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 9px;
  border-right: 1px solid var(--ink-900);
  border-bottom: 1px solid var(--ink-900);
  transform: rotate(40deg) scale(0);
  transition: transform 0.16s var(--ease);
}

.page-contact .check-input:checked + .check-label .check-box {
  background: var(--cyan-400);
  border-color: var(--cyan-400);
}

.page-contact .check-input:checked + .check-label .check-box::after {
  transform: rotate(40deg) scale(1);
}

.page-contact .check-input:focus-visible + .check-label .check-box {
  outline: 2px solid var(--cyan-200);
  outline-offset: 2px;
}

.page-contact .check-input:checked + .check-label .check-text strong {
  color: var(--cyan-200);
}

.page-contact .check-text {
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .check-text strong {
  display: block;
  margin-bottom: 3px;
  font-size: 15px;
  font-weight: 700;
  color: var(--text);
  transition: color 0.16s var(--ease);
}

/* ---------- 推进节奏 ---------- */
.page-contact .steps-band {
  border-top: 1px solid var(--line-500);
  padding-top: clamp(18px, 3vw, 28px);
}

.page-contact .steps-figure {
  margin: 0 0 clamp(24px, 4vw, 36px);
}

.page-contact .steps-figure .figure__img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.page-contact .steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
}

.page-contact .step {
  position: relative;
  padding: 16px 0 12px;
  border-top: 2px solid var(--line-500);
}

.page-contact .step::before {
  content: "";
  position: absolute;
  top: -2px;
  left: 0;
  width: 26px;
  height: 2px;
  background: var(--cyan-400);
}

.page-contact .step__num {
  display: block;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--cyan-400);
}

.page-contact .step__name {
  margin: 8px 0 6px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.page-contact .step__text {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 分流入口 ---------- */
.page-contact .route-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-500);
}

.page-contact .route-item {
  display: grid;
  grid-template-columns: 26px minmax(0, 1fr) auto;
  gap: 0 14px;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-500);
  text-decoration: none;
  color: inherit;
}

.page-contact .route-k {
  grid-row: 1 / span 2;
  align-self: center;
  font-size: 12px;
  color: var(--cyan-400);
}

.page-contact .route-t {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--text);
  transition: color 0.16s var(--ease);
}

.page-contact .route-d {
  font-size: 13px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .route-arrow {
  grid-row: 1 / span 2;
  align-self: center;
  justify-self: end;
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--cyan-400);
  transition: transform 0.16s var(--ease);
}

.page-contact .route-item:hover .route-t {
  color: var(--cyan-200);
}

.page-contact .route-item:hover .route-arrow {
  transform: translateX(6px);
}

.page-contact .route-item:focus-visible {
  outline: 2px solid var(--cyan-200);
  outline-offset: 3px;
}

/* ---------- 断点 ---------- */
@media (min-width: 768px) {
  .page-contact .checklist {
    grid-template-columns: 1fr 1fr;
  }

  .page-contact .track-panel {
    padding-left: 46px;
  }
}

@media (min-width: 880px) {
  .page-contact .breadcrumb {
    padding-top: 28px;
  }

  .page-contact .contact-hero {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: var(--pc-gap);
    align-items: start;
    padding: 32px 0 72px;
  }

  .page-contact .contact-hero__lead .lede {
    font-size: 16px;
  }

  .page-contact .hero-item {
    grid-template-columns: 52px minmax(0, 1fr);
    padding: 18px 0;
  }

  .page-contact .hero-num {
    font-size: 19px;
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: var(--pc-gap);
    border-top: 1px solid var(--line-500);
  }

  .page-contact .channel {
    padding: 24px 0 28px;
  }

  .page-contact .steps-figure {
    max-width: 560px;
  }

  .page-contact .steps-figure .figure__img {
    aspect-ratio: 16 / 9;
  }

  .page-contact .steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    column-gap: 32px;
  }

  .page-contact .step {
    padding: 20px 0 8px;
  }

  .page-contact .step::after {
    content: "";
    position: absolute;
    top: 24px;
    right: -18px;
    width: 0;
    height: 0;
    border-left: 8px solid var(--line-500);
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
  }

  .page-contact .step:last-child::after {
    display: none;
  }

  .page-contact .route-item {
    padding: 22px 0;
  }
}
<<<END>>>