.page-contact {
  --contact-side: 320px;
  padding-top: calc(var(--header-h) + 32px);
  padding-bottom: 72px;
  overflow-x: hidden;
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  margin-bottom: 28px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: 36px 0 44px;
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 64px;
  height: 2px;
  background: var(--amber-signal);
}

.page-contact .contact-hero .page-hero__title {
  margin: 16px 0 18px;
  font-size: clamp(30px, 6.6vw, 62px);
  line-height: 1.16;
  font-weight: 900;
  letter-spacing: -0.02em;
  color: var(--bone-50);
}

.page-contact .contact-hero .page-hero__sub {
  max-width: 40em;
  color: rgba(243, 239, 230, 0.78);
  font-size: var(--fs-body);
  line-height: 1.85;
}

.page-contact .contact-hero__back {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  margin-top: 26px;
}

/* ---------- 章节头微调 ---------- */
.page-contact .section {
  padding-top: 56px;
}

.page-contact .section-head {
  margin-bottom: 32px;
}

.page-contact .section-head--tight {
  margin-bottom: 22px;
}

/* ---------- 三格联络面板 ---------- */
.page-contact .contact-channel-grid {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
  border-left: 1px solid var(--line);
}

.page-contact .contact-channel {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 26px 22px 24px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(15, 36, 26, 0.55) 0%, rgba(8, 21, 15, 0.15) 100%);
  transition: background 220ms var(--ease), transform 220ms var(--ease),
    border-color 220ms var(--ease);
}

.page-contact .contact-channel::after {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 2px;
  background: var(--electric-500);
  transform: scaleX(0);
  transform-origin: left center;
  transition: transform 260ms var(--ease);
}

.page-contact .contact-channel:hover,
.page-contact .contact-channel:focus-within {
  background: rgba(15, 36, 26, 0.9);
  transform: translateY(-2px);
  border-color: var(--line-strong);
}

.page-contact .contact-channel:hover::after,
.page-contact .contact-channel:focus-within::after {
  transform: scaleX(1);
}

.page-contact .contact-channel__num {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock-500);
}

.page-contact .contact-channel__title {
  margin: 0;
  font-size: 20px;
  font-weight: 700;
  color: var(--bone-50);
  letter-spacing: -0.01em;
}

.page-contact .contact-channel__value {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
  line-height: 1.5;
  color: var(--amber-signal);
  word-break: break-word;
  font-variant-numeric: tabular-nums;
}

.page-contact .contact-channel__value--addr {
  font-style: normal;
  color: var(--electric-500);
}

.page-contact .contact-channel__desc {
  margin: 0;
  flex: 1 1 auto;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 239, 230, 0.72);
}

.page-contact .contact-channel__meta {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 4px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--rock-500);
}

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

.page-contact .contact-checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-checklist__mark {
  flex: 0 0 auto;
  margin-top: 4px;
  font-size: 13px;
  color: var(--moss-600);
  transition: color 200ms var(--ease);
}

.page-contact .contact-checklist__item:hover .contact-checklist__mark {
  color: var(--electric-500);
}

.page-contact .contact-checklist__text {
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 239, 230, 0.78);
}

.page-contact .contact-checklist__text strong {
  color: var(--bone-50);
  font-weight: 700;
}

.page-contact .contact-brief__side {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-top: 32px;
}

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

.page-contact .contact-brief__media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  filter: saturate(0.85);
}

.page-contact .contact-window .kpi {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.page-contact .contact-window .kpi__value {
  font-size: 64px;
  line-height: 1;
  font-weight: 900;
  color: var(--amber-signal);
  font-variant-numeric: tabular-nums;
}

.page-contact .contact-window .kpi__label {
  font-size: 14px;
  color: var(--rock-500);
  letter-spacing: 0.04em;
}

.page-contact .contact-window__note {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(243, 239, 230, 0.68);
}

/* ---------- 自助路径 ---------- */
.page-contact .contact-selfserve {
  padding-bottom: 8px;
}

.page-contact .contact-route {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-route__item {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
  transition: background 200ms var(--ease);
}

.page-contact .contact-route__item:hover {
  background: rgba(15, 36, 26, 0.5);
}

.page-contact .contact-route__num {
  margin: 2px 0 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--rock-500);
  transition: color 200ms var(--ease);
}

.page-contact .contact-route__item:hover .contact-route__num {
  color: var(--electric-500);
}

.page-contact .contact-route__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.page-contact .contact-route__title .link {
  color: var(--bone-50);
  text-decoration: none;
}

.page-contact .contact-route__item:hover .contact-route__title .link {
  color: var(--electric-500);
}

.page-contact .contact-route__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: rgba(243, 239, 230, 0.7);
}

.page-contact .contact-nudge {
  margin-top: 28px;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-left: 3px solid var(--clay-500);
  background: rgba(15, 36, 26, 0.6);
}

.page-contact .contact-nudge__label {
  margin: 0 0 10px;
}

.page-contact .contact-nudge__text {
  margin: 0 0 18px;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 239, 230, 0.78);
}

.page-contact .contact-nudge__btn {
  display: inline-block;
}

/* ---------- 受理范围 ---------- */
.page-contact .contact-scope-grid {
  display: grid;
  gap: 18px;
}

.page-contact .contact-scope {
  padding: 22px 20px 24px;
  border: 1px solid var(--line);
  background: rgba(11, 27, 18, 0.55);
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-contact .contact-scope:hover {
  border-color: var(--line-strong);
  background: rgba(15, 36, 26, 0.85);
}

.page-contact .contact-scope .tag {
  display: inline-block;
  margin: 0 0 14px;
}

.page-contact .contact-scope__title {
  margin: 0 0 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--bone-50);
}

.page-contact .contact-scope__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: rgba(243, 239, 230, 0.72);
}

/* ---------- 机构合作 ---------- */
.page-contact .contact-institution__visual {
  margin-bottom: 28px;
}

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

.page-contact .contact-institution__media img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  filter: saturate(0.8);
}

.page-contact .contact-institution__body .prose {
  margin-top: 0;
  color: rgba(243, 239, 230, 0.78);
  line-height: 1.85;
}

.page-contact .contact-timeline {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.page-contact .contact-timeline__step {
  position: relative;
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 14px 0 14px 26px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: rgba(243, 239, 230, 0.78);
}

.page-contact .contact-timeline__step::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 100%;
  background: var(--line);
}

.page-contact .contact-timeline__step:first-child::before {
  top: 50%;
  height: 50%;
}

.page-contact .contact-timeline__step:last-child::before {
  top: 0;
  height: 50%;
}

.page-contact .contact-timeline__dot {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 13px;
  height: 13px;
  border: 1px solid var(--moss-600);
  background: var(--pitch-950);
  transition: border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-contact .contact-timeline__step:hover .contact-timeline__dot {
  border-color: var(--electric-500);
  background: var(--electric-500);
}

.page-contact .contact-institution__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  margin: 28px 0 0;
}

/* ---------- 收束 ---------- */
.page-contact .contact-signoff {
  padding-top: 64px;
}

.page-contact .contact-signoff__panel {
  position: relative;
  padding: 34px 26px 30px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(135deg, rgba(63, 107, 78, 0.28) 0%, rgba(182, 114, 76, 0.16) 100%),
    var(--pitch-850);
}

.page-contact .contact-signoff__panel::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 90px;
  height: 2px;
  background: var(--amber-signal);
}

.page-contact .contact-signoff__title {
  margin: 12px 0 14px;
  font-size: clamp(24px, 4.5vw, 34px);
  font-weight: 900;
  line-height: 1.25;
  letter-spacing: -0.02em;
  color: var(--bone-50);
}

.page-contact .contact-signoff__text {
  margin: 0 0 22px;
  max-width: 38em;
  font-size: 16px;
  line-height: 1.85;
  color: rgba(243, 239, 230, 0.78);
}

.page-contact .contact-signoff__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 20px;
  align-items: center;
  margin: 0 0 22px;
}

.page-contact .contact-signoff__legal {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--rock-500);
}

/* ---------- 中型屏 ---------- */
@media (min-width: 720px) {
  .page-contact {
    padding-bottom: 96px;
  }

  .page-contact .contact-channel {
    padding: 30px 26px 28px;
  }

  .page-contact .contact-scope-grid {
    gap: 22px;
  }

  .page-contact .contact-signoff__panel {
    padding: 44px 40px 36px;
  }
}

/* ---------- 桌面栅格 ---------- */
@media (min-width: 960px) {
  .page-contact .contact-channel-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .contact-brief__side {
    margin-top: 0;
  }

  .page-contact .contact-route {
    margin-bottom: 0;
  }

  .page-contact .contact-nudge {
    margin-top: 0;
    align-self: start;
  }

  .page-contact .contact-institution__visual {
    margin-bottom: 0;
    align-self: start;
  }

  .page-contact .contact-institution__media img {
    aspect-ratio: 3 / 4;
    height: 100%;
  }

  .page-contact .contact-scope-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-channel,
  .page-contact .contact-channel::after,
  .page-contact .contact-route__item,
  .page-contact .contact-timeline__step .contact-timeline__dot {
    transition: none;
  }
}
<<<END>>>