.page-contact {
  display: block;
  --contact-cut: 16px;
  --paper-soft: rgba(241, 247, 243, 0.76);
  --route-line: rgba(47, 243, 208, 0.34);
}

/* ---------- 外壳 ---------- */
.page-contact .contact-shell {
  display: block;
  padding-bottom: clamp(64px, 10vw, 128px);
}

.page-contact .contact-body {
  min-width: 0;
}

.page-contact .contact-rail {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 14px 0 12px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .contact-rail .index-rail__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  flex: 0 0 auto;
  padding: 7px 13px 7px 11px;
  border: 1px solid var(--line-soft);
  background: rgba(14, 42, 34, 0.5);
  color: var(--muted);
  font-size: var(--fs-sm);
  line-height: 1.4;
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease),
    background-color 0.22s var(--ease);
}

.page-contact .contact-rail .index-rail__link:hover,
.page-contact .contact-rail .index-rail__link[aria-current="true"] {
  color: var(--cyan);
  border-color: rgba(47, 243, 208, 0.6);
  background: rgba(47, 243, 208, 0.08);
}

.page-contact .contact-rail__num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  color: var(--gold);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(26px, 6vw, 58px) 0 clamp(30px, 5vw, 54px);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  inset: -8% -12% 0 -6%;
  background-image: linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  opacity: 0.55;
  -webkit-mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  mask-image: linear-gradient(to bottom, #000 0%, transparent 88%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  right: 4%;
  top: clamp(16px, 4vw, 44px);
  width: clamp(80px, 18vw, 190px);
  height: 3px;
  background: linear-gradient(90deg, rgba(255, 107, 61, 0), var(--orange));
  transform: skewX(-34deg);
  pointer-events: none;
  z-index: 0;
}

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

.page-contact .contact-hero__kicker {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.22em;
  color: var(--gold);
}

.page-contact .contact-hero__title {
  margin: 0;
  font-size: var(--fs-xxl);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.03em;
  color: var(--paper);
}

.page-contact .contact-hero__lead {
  margin: 18px 0 0;
  max-width: 58ch;
  font-size: 1.0625rem;
  line-height: 1.8;
  color: var(--paper-soft);
  overflow-wrap: break-word;
}

.page-contact .contact-hero__meta {
  margin: 22px 0 0;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 章节间距 ---------- */
.page-contact .contact-block {
  padding-top: clamp(46px, 7vw, 84px);
}

/* ---------- 联系卡片 ---------- */
.page-contact .contact-cards-wrap {
  position: relative;
  margin-top: clamp(24px, 4vw, 38px);
  padding: clamp(16px, 3vw, 26px);
  border: 1px solid var(--line);
  overflow: hidden;
  background: linear-gradient(150deg, rgba(14, 42, 34, 0.62), rgba(6, 20, 16, 0.92));
}

.page-contact .contact-cards__backdrop {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-contact .contact-cards__backdrop img {
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.16;
  filter: saturate(0.5);
}

.page-contact .contact-cards {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 16px;
}

.page-contact .contact-card {
  position: relative;
  padding: 24px 22px 20px;
  background: rgba(6, 20, 16, 0.84);
  border: 1px solid var(--line);
  clip-path: polygon(
    0 0,
    calc(100% - var(--contact-cut)) 0,
    100% var(--contact-cut),
    100% 100%,
    var(--contact-cut) 100%,
    0 calc(100% - var(--contact-cut))
  );
  transition: border-color 0.24s var(--ease), background-color 0.24s var(--ease);
}

.page-contact .contact-card:hover {
  border-color: rgba(47, 243, 208, 0.55);
  background: rgba(14, 42, 34, 0.92);
}

.page-contact .contact-card__index {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.2em;
  color: var(--muted);
  transition: color 0.24s var(--ease);
}

.page-contact .contact-card:hover .contact-card__index {
  color: var(--cyan);
}

.page-contact .contact-card__kind {
  margin: 0 0 10px;
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .contact-card__value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 1.0625rem;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--cyan);
  overflow-wrap: anywhere;
}

.page-contact .contact-card__value--addr {
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.75;
  color: var(--paper);
}

.page-contact .contact-card__note {
  margin: 0;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .contact-card__meta {
  margin: 16px 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--line-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.06em;
  color: var(--gold);
}

/* ---------- 合作方向 ---------- */
.page-contact .coop-list {
  display: grid;
  gap: 14px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-contact .coop-item {
  padding: clamp(20px, 3vw, 28px);
  background: var(--panel);
  border-left: 3px solid var(--cyan);
  transition: background-color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-contact .coop-item:nth-child(2) {
  border-left-color: var(--gold);
}

.page-contact .coop-item:nth-child(3) {
  border-left-color: var(--orange);
}

.page-contact .coop-item:hover {
  background: var(--panel-2);
}

.page-contact .coop-item__head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.page-contact .coop-item__index {
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .coop-item__title {
  margin: 0;
  font-size: var(--fs-lg);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .coop-item__text {
  margin: 0;
  max-width: 68ch;
  font-size: var(--fs-base);
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-contact .coop-materials {
  margin-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .coop-materials > summary {
  position: relative;
  padding: 14px 30px 12px 0;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: var(--fs-sm);
  letter-spacing: 0.08em;
  color: var(--cyan);
  list-style: none;
}

.page-contact .coop-materials > summary::-webkit-details-marker {
  display: none;
}

.page-contact .coop-materials > summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.125rem;
  line-height: 1;
  color: var(--gold);
}

.page-contact .coop-materials[open] > summary::after {
  content: "–";
}

.page-contact .coop-materials ul {
  margin: 0 0 8px;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 8px;
}

.page-contact .coop-materials li {
  position: relative;
  padding-left: 20px;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-contact .coop-materials li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 10px;
  height: 1px;
  background: var(--cyan);
}

/* ---------- 资料纠错 ---------- */
.page-contact .correction-grid {
  display: grid;
  gap: 24px;
  margin-top: clamp(22px, 3vw, 32px);
}

.page-contact .correction-copy p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: var(--fs-base);
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-contact .correction-copy p:last-child {
  margin-bottom: 0;
}

.page-contact .correction-copy a {
  color: var(--cyan);
}

.page-contact .correction-list {
  padding: clamp(20px, 3vw, 28px);
  background: var(--charcoal);
  border: 1px solid var(--line-gold);
}

.page-contact .correction-list__title {
  margin: 0 0 16px;
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--gold);
}

.page-contact .correction-list ul {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .correction-list li {
  display: grid;
  grid-template-columns: 28px minmax(0, 1fr);
  gap: 8px;
  font-size: var(--fs-sm);
  line-height: 1.75;
  color: var(--paper-soft);
}

.page-contact .fix-num {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.08em;
  line-height: 1.9;
  color: var(--cyan);
}

/* ---------- 通道同步 ---------- */
.page-contact .sync-list {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}

.page-contact .sync-list li {
  padding: 15px 18px;
  background: var(--ink);
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-contact .sync-key {
  display: inline-block;
  min-width: 62px;
  margin-right: 10px;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.1em;
  color: var(--cyan);
}

.page-contact .sync-note {
  margin: 22px 0 0;
  padding: 16px 18px;
  border-left: 3px solid var(--orange);
  background: rgba(255, 107, 61, 0.08);
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--paper-soft);
}

.page-contact .sync-note a {
  color: var(--cyan);
}

/* ---------- 准备路线 ---------- */
.page-contact .route {
  position: relative;
  margin-top: clamp(24px, 4vw, 36px);
}

.page-contact .route::before {
  content: "";
  position: absolute;
  left: 11px;
  top: 10px;
  bottom: 10px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    rgba(47, 243, 208, 0.5),
    rgba(47, 243, 208, 0.12) 72%,
    transparent
  );
  transform: skewX(-12deg);
  transform-origin: top center;
  pointer-events: none;
}

.page-contact .route__node {
  position: relative;
  padding: 0 0 24px 44px;
  transition: transform 0.24s var(--ease);
}

.page-contact .route__node:hover {
  transform: translateX(4px);
}

.page-contact .route__node::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 8px;
  width: 15px;
  height: 15px;
  border: 1px solid var(--cyan);
  background: var(--ink);
  transform: rotate(45deg);
  transition: background-color 0.24s var(--ease);
}

.page-contact .route__node:hover::before {
  background: var(--cyan);
}

.page-contact .route__index {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.16em;
  color: var(--gold);
}

.page-contact .route__title {
  margin: 8px 0 6px;
  font-size: var(--fs-md);
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .route__desc {
  margin: 0;
  max-width: 58ch;
  font-size: var(--fs-sm);
  line-height: 1.8;
  color: var(--paper-soft);
}

.page-contact .route__media {
  position: relative;
  margin: 6px 0 26px;
  background: var(--panel);
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .route__media .media__frame {
  display: block;
}

.page-contact .route__media img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
}

.page-contact .route__media .media__caption {
  padding: 10px 14px;
  border-top: 1px solid var(--line-soft);
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.06em;
  color: var(--muted);
}

/* ---------- 来访与寄送 ---------- */
.page-contact .coord-address {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding: clamp(16px, 2.6vw, 26px);
  font-style: normal;
  display: grid;
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line);
}

.page-contact .coord-address__row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 12px 14px;
  background: var(--panel);
}

.page-contact .coord-address__key {
  font-family: var(--font-mono);
  font-size: var(--fs-mono);
  letter-spacing: 0.18em;
  color: var(--cyan);
}

.page-contact .coord-address__value {
  font-size: var(--fs-base);
  line-height: 1.7;
  color: var(--paper);
  overflow-wrap: break-word;
}

.page-contact .visit-note {
  margin: 22px 0 0;
  max-width: 66ch;
  font-size: var(--fs-sm);
  line-height: 1.85;
  color: var(--paper-soft);
}

/* ---------- 相关入口 ---------- */
.page-contact .contact-links {
  display: grid;
  gap: 1px;
  margin-top: clamp(34px, 5vw, 56px);
  background: var(--line-soft);
  border-top: 1px solid var(--line);
}

.page-contact .contact-links__link {
  display: block;
  padding: 16px 18px;
  background: var(--ink);
  color: var(--paper);
  font-size: var(--fs-sm);
  line-height: 1.7;
  text-decoration: none;
  transition: background-color 0.2s var(--ease), color 0.2s var(--ease),
    padding-left 0.2s var(--ease);
}

.page-contact .contact-links__link:hover {
  background: var(--panel-2);
  color: var(--cyan-soft);
  padding-left: 26px;
}

/* ---------- 桌面布局 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-contact .correction-grid {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, 0.92fr);
    gap: clamp(24px, 4vw, 48px);
    align-items: start;
  }

  .page-contact .route__media {
    margin-left: 44px;
  }

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

@media (min-width: 900px) {
  .page-contact .coop-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1px;
    background: var(--line-soft);
  }

  .page-contact .coop-item {
    border-left: 0;
    border-top: 3px solid var(--cyan);
  }

  .page-contact .coop-item:nth-child(2) {
    border-top-color: var(--gold);
  }

  .page-contact .coop-item:nth-child(3) {
    border-top-color: var(--orange);
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-shell {
    display: grid;
    grid-template-columns: 176px minmax(0, 1fr);
    gap: clamp(32px, 4vw, 64px);
    align-items: start;
  }

  .page-contact .contact-rail {
    position: sticky;
    top: 112px;
    flex-direction: column;
    gap: 4px;
    overflow: visible;
    padding: 4px 0;
    margin-bottom: 0;
    border-bottom: 0;
    border-left: 1px solid var(--line-soft);
  }

  .page-contact .contact-rail .index-rail__link {
    justify-content: flex-start;
    border: 0;
    border-left: 2px solid transparent;
    background: transparent;
    padding: 8px 8px 8px 14px;
    margin-left: -1px;
  }

  .page-contact .contact-rail .index-rail__link:hover,
  .page-contact .contact-rail .index-rail__link[aria-current="true"] {
    background: transparent;
    border-left-color: var(--cyan);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .coop-item,
  .page-contact .route__node,
  .page-contact .contact-links__link,
  .page-contact .contact-rail .index-rail__link {
    transition: none;
  }

  .page-contact .route__node:hover {
    transform: none;
  }
}