.page-contact {
  --pc-card-pad: 26px;
  --pc-section-gap: 96px;
  padding-bottom: 104px;
}

/* ---------- 面包屑与首屏 ---------- */
.page-contact .breadcrumb {
  margin: 8px 0 30px;
}

.page-contact .contact-hero {
  margin-bottom: 72px;
}

.page-contact .hero-kicker {
  margin: 0 0 18px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--muted);
}

.page-contact .hero-title {
  margin: 0 0 22px;
  max-width: 17em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(30px, 5vw, 46px);
  line-height: 1.28;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .hero-lede {
  margin: 0 0 40px;
  max-width: 42em;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--muted);
}

.page-contact .hero-anchors {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

.page-contact .hero-anchors li {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 14px;
  border-top: 1px solid var(--line-scale);
}

.page-contact .anchor-num {
  font-size: 30px;
  line-height: 1;
  letter-spacing: 0;
  color: var(--rc, var(--cyan));
}

.page-contact .anchor-label {
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

@media (min-width: 640px) {
  .page-contact .hero-anchors {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 28px;
    max-width: 720px;
  }
}

/* ---------- 主体骨架 ---------- */
.page-contact .contact-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 40px;
}

@media (min-width: 1024px) {
  .page-contact .contact-body {
    grid-template-columns: 112px minmax(0, 1fr);
    gap: 64px;
  }
}

.page-contact .index-rail {
  display: none;
}

@media (min-width: 1024px) {
  .page-contact .index-rail {
    display: block;
    position: sticky;
    top: 128px;
    align-self: start;
    padding-left: 16px;
    border-left: 1px solid var(--line-scale);
  }
}

.page-contact .rail-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.page-contact .rail-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.2s var(--ease-out);
}

.page-contact .rail-dot {
  flex: none;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--line-scale);
  transition: background 0.2s var(--ease-out), box-shadow 0.2s var(--ease-out);
}

.page-contact .rail-link:hover,
.page-contact .rail-link[aria-current="true"] {
  color: var(--paper);
}

.page-contact .rail-link:hover .rail-dot,
.page-contact .rail-link[aria-current="true"] .rail-dot {
  background: var(--rc);
  box-shadow: 0 0 10px var(--rc);
}

.page-contact .rail-link:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 4px;
}

/* ---------- 章节通用 ---------- */
.page-contact .contact-section {
  margin-bottom: var(--pc-section-gap);
}

.page-contact .contact-section:last-child {
  margin-bottom: 0;
}

.page-contact .section-head {
  margin-bottom: 36px;
}

.page-contact .section-num {
  display: block;
  margin: 0 0 12px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--amber);
}

.page-contact .section-title {
  margin: 0 0 14px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 3.2vw, 30px);
  line-height: 1.4;
  letter-spacing: 0.03em;
  color: var(--paper);
}

.page-contact .section-lede {
  margin: 0;
  max-width: 40em;
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 01 联系渠道 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 18px;
}

@media (min-width: 780px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
    gap: 20px;
  }

  .page-contact .channel-card:nth-child(2) {
    margin-top: 44px;
  }

  .page-contact .channel-card:nth-child(3) {
    margin-top: 88px;
  }
}

.page-contact .channel-card {
  position: relative;
  padding: var(--pc-card-pad);
  background: var(--glass);
  border: 1px solid var(--line-scale);
  border-radius: 4px;
  transition: border-color 0.18s var(--ease-out), box-shadow 0.18s var(--ease-out), transform 0.18s var(--ease-out);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 18px;
  bottom: 18px;
  width: 2px;
  border-radius: 2px;
  background: var(--rc);
  opacity: 0.62;
}

.page-contact .channel-card:hover {
  border-color: var(--rc);
  box-shadow: 0 0 22px -8px var(--rc);
  transform: translateY(-2px);
}

.page-contact .channel-tag {
  display: inline-block;
  margin-bottom: 16px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--muted);
}

.page-contact .channel-name {
  margin: 0 0 12px;
  font-size: 19px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .channel-value {
  margin: 0 0 18px;
  padding-bottom: 16px;
  border-bottom: 1px dashed var(--line-scale);
  font-size: 13.5px;
  line-height: 1.7;
  letter-spacing: 0;
  color: var(--rc);
  word-break: break-word;
}

.page-contact .channel-fit {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--paper);
  opacity: 0.84;
}

.page-contact .channel-tip {
  margin: 0;
  font-size: 13px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .contact-figure {
  margin: 40px 0 0;
}

.page-contact .contact-figure .figure-img {
  aspect-ratio: 3 / 2;
}

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

/* ---------- 02 邮件建议 ---------- */
.page-contact .mail-card {
  background: var(--glass);
  border: 1px solid var(--line-scale);
  border-radius: 4px;
  overflow: hidden;
}

.page-contact .mail-card-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 14px 20px;
  border-bottom: 1px solid var(--line-scale);
}

.page-contact .mail-card-tag {
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--rc, var(--cyan));
}

.page-contact .mail-card-hint {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--muted);
}

.page-contact .mail-card-body {
  margin: 0;
  padding: 22px 20px 24px;
  font-size: 13px;
  line-height: 2.05;
  letter-spacing: 0;
  color: var(--paper);
  white-space: pre-wrap;
  overflow-x: auto;
}

.page-contact .mail-notes {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 12px;
}

@media (min-width: 720px) {
  .page-contact .mail-notes {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }
}

.page-contact .mail-notes li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .mail-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  opacity: 0.7;
}

/* ---------- 03 答复窗口 ---------- */
.page-contact .window-panel {
  position: relative;
  padding: 30px 26px 32px;
  background: var(--ink-cabin);
  border: 1px solid var(--line-scale);
  border-radius: 4px;
}

.page-contact .window-panel::after {
  content: "";
  position: absolute;
  right: 10px;
  top: 24px;
  bottom: 24px;
  width: 1px;
  background: repeating-linear-gradient(to bottom, var(--line-scale) 0 1px, transparent 1px 14px);
}

.page-contact .window-strip {
  margin-bottom: 28px;
  padding-right: 20px;
}

.page-contact .window-track {
  position: relative;
  height: 8px;
  border-radius: 4px;
  background: var(--line-scale);
  overflow: hidden;
}

.page-contact .window-fill {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--cyan), var(--mint), var(--amber));
  opacity: 0.85;
}

.page-contact .window-marks {
  display: flex;
  justify-content: space-between;
  margin-top: 10px;
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--muted);
}

.page-contact .window-copy p {
  margin: 0 0 14px;
  max-width: 40em;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--paper);
  opacity: 0.86;
}

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

/* ---------- 04 常见咨询 ---------- */
.page-contact .topic-list {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

@media (min-width: 780px) {
  .page-contact .topic-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 44px;
  }
}

.page-contact .topic-item {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 24px 0;
  border-top: 1px solid var(--line-scale);
}

.page-contact .topic-idx {
  font-size: 13px;
  line-height: 1.9;
  letter-spacing: 0;
  color: var(--rc);
}

.page-contact .topic-title {
  margin: 0 0 8px;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .topic-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}

/* ---------- 05 最近调整 ---------- */
.page-contact .revision-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 32px;
  align-items: center;
}

@media (min-width: 860px) {
  .page-contact .revision-panel {
    grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
    gap: 56px;
  }
}

.page-contact .revision-figure {
  margin: 0;
  max-width: 300px;
}

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

.page-contact .revision-badge {
  display: inline-block;
  margin-bottom: 18px;
  padding: 6px 14px;
  border: 1px solid var(--rc, var(--amber));
  border-radius: 999px;
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--rc, var(--amber));
}

.page-contact .revision-title {
  margin: 0 0 16px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 21px;
  line-height: 1.55;
  letter-spacing: 0.02em;
  color: var(--paper);
}

.page-contact .revision-text {
  margin: 0 0 14px;
  max-width: 38em;
  font-size: 14.5px;
  line-height: 1.95;
  color: var(--muted);
}

.page-contact .revision-links {
  list-style: none;
  margin: 22px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}

.page-contact .revision-links a {
  font-size: 13.5px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  padding-bottom: 2px;
  transition: border-color 0.18s var(--ease-out), color 0.18s var(--ease-out);
}

.page-contact .revision-links a:hover {
  border-color: var(--cyan);
}

/* ---------- 06 到访与邮寄 ---------- */
.page-contact .visit-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

@media (min-width: 780px) {
  .page-contact .visit-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    column-gap: 40px;
  }
}

.page-contact .visit-block {
  padding: 22px 0;
  border-top: 1px solid var(--line-scale);
}

.page-contact .visit-title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--paper);
}

.page-contact .visit-title::before {
  content: "";
  display: inline-block;
  width: 6px;
  height: 6px;
  margin-right: 9px;
  border-radius: 50%;
  background: var(--amber);
  vertical-align: middle;
}

.page-contact .visit-text {
  margin: 0;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}

.page-contact .visit-tail {
  margin: 34px 0 0;
  padding-top: 22px;
  border-top: 1px solid var(--line-scale);
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}

.page-contact .visit-tail a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(0, 229, 255, 0.35);
  padding-bottom: 1px;
  transition: border-color 0.18s var(--ease-out);
}

.page-contact .visit-tail a:hover {
  border-color: var(--cyan);
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 480px) {
  .page-contact {
    --pc-card-pad: 20px;
    --pc-section-gap: 72px;
  }

  .page-contact .contact-hero {
    margin-bottom: 52px;
  }

  .page-contact .mail-card-body {
    padding: 18px 16px 20px;
    font-size: 12.5px;
    line-height: 1.95;
  }

  .page-contact .window-panel {
    padding: 24px 18px 26px;
  }

  .page-contact .window-panel::after {
    display: none;
  }

  .page-contact .revision-figure {
    max-width: 220px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .rail-link,
  .page-contact .rail-dot {
    transition: none;
  }
}