/* ===== 联系我们 · 信笺版式 ===== */
.page-contact {
  --letter-rule: rgba(14, 42, 34, .055);
  --letter-dash: rgba(92, 107, 102, .5);
  --letter-tint: rgba(22, 56, 46, .06);
  background: var(--porcelain);
  color: var(--ink);
  padding-bottom: 72px;
  overflow-x: hidden;
}

.page-contact .section {
  margin-top: 56px;
}

.page-contact .chapter-head {
  margin-bottom: 24px;
}

.page-contact .chapter-num {
  display: block;
  font-family: var(--font-display);
  font-size: 1.4rem;
  letter-spacing: .1em;
  color: var(--gold);
  margin-bottom: 8px;
}

.page-contact h2 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(1.45rem, 4.6vw, 2rem);
  line-height: 1.35;
  letter-spacing: -.01em;
  margin: 0 0 12px;
}

.page-contact h3 {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  margin: 0 0 10px;
}

.page-contact p {
  color: var(--ink);
  line-height: 1.85;
  margin: 0 0 1em;
}

/* ---- 首屏信笺卡片 ---- */
.page-contact .contact-letter {
  padding: calc(var(--header-h) + 26px) 0 8px;
}

.page-contact .contact-letter__inner {
  position: relative;
  background-color: var(--paper);
  background-image: repeating-linear-gradient(to bottom, transparent 0 33px, var(--letter-rule) 33px 34px);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow-paper);
  padding: 30px 22px 26px;
  overflow: hidden;
  display: grid;
  gap: 30px;
}

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

.page-contact .contact-letter__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .13;
  filter: saturate(.7);
  max-width: 100%;
  height: auto;
}

.page-contact .contact-letter__bg img {
  height: 100%;
}

.page-contact .contact-letter__body,
.page-contact .contact-letter__channels {
  position: relative;
  z-index: 1;
}

.page-contact .contact-letter__body h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.9rem, 6vw, 3rem);
  line-height: 1.2;
  letter-spacing: -.015em;
  margin: 10px 0 16px;
  max-width: 20ch;
}

.page-contact .contact-letter__body .lede {
  font-size: 1.05rem;
  color: var(--moss);
  max-width: 52ch;
}

.page-contact .contact-letter__sign {
  font-family: var(--font-display);
  font-size: .95rem;
  color: var(--stone);
  margin: 6px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-ink);
  max-width: 22ch;
}

.page-contact .contact-letter__channels {
  background: rgba(245, 242, 234, .78);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  padding: 20px 18px;
  backdrop-filter: blur(2px);
}

.page-contact .channel-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
}

.page-contact .channel-list__item {
  padding: 12px 0;
  border-bottom: 1px dashed var(--letter-dash);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
}

.page-contact .channel-list__item:last-child {
  border-bottom: 0;
}

.page-contact .channel-list__label {
  display: block;
  width: 100%;
  font-size: .8rem;
  letter-spacing: .1em;
  color: var(--stone);
}

.page-contact .channel-list__value {
  font-size: .92rem;
  color: var(--night);
  word-break: break-all;
  flex: 1 1 auto;
}

.page-contact .channel-list__hint {
  font-size: .85rem;
  line-height: 1.7;
  color: var(--stone);
  margin: 4px 0 0;
}

.page-contact .contact-copy {
  flex: 0 0 auto;
  font-family: var(--font-body);
  font-size: .78rem;
  letter-spacing: .04em;
  color: var(--forest);
  background: transparent;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  padding: 5px 10px;
  cursor: pointer;
  transition: background .18s ease, color .18s ease, border-color .18s ease;
}

.page-contact .contact-copy:hover,
.page-contact .contact-copy:focus-visible {
  background: var(--gold-lit);
  border-color: var(--gold);
  color: var(--night);
}

.page-contact .contact-copy--link {
  text-decoration: none;
  display: inline-block;
}

/* ---- 三张通道卡 ---- */
.page-contact .contact-paths__grid {
  display: grid;
  gap: 18px;
}

.page-contact .contact-card {
  position: relative;
  background: var(--paper);
  border: 1px solid var(--line-ink);
  border-left: 3px solid var(--gold);
  border-radius: var(--radius);
  padding: 24px 20px;
  transition: transform .22s ease, box-shadow .22s ease, background .22s ease;
}

.page-contact .contact-card__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 14px;
  color: var(--gold);
  background: var(--letter-tint);
  border: 1px solid var(--line-ink);
  border-radius: 50%;
}

.page-contact .contact-card__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  margin: 0 0 8px;
}

.page-contact .contact-card__line {
  margin: 0;
  color: var(--moss);
  font-size: .97rem;
}

.page-contact .contact-card__more {
  margin: 0;
  font-size: .9rem;
  line-height: 1.7;
  color: var(--stone);
  border-top: 1px dashed var(--letter-dash);
  padding-top: 10px;
  margin-top: 10px;
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-visible {
  transform: translateY(-3px);
  box-shadow: var(--shadow-paper);
  background: #fff;
  outline: none;
}

.page-contact .contact-card:hover .contact-card__icon,
.page-contact .contact-card:focus-visible .contact-card__icon {
  color: var(--coral-ink);
  border-color: var(--coral);
}

/* ---- 正文主栏与右窄栏 ---- */
.page-contact .contact-main__grid {
  display: grid;
  gap: 40px;
}

.page-contact .contact-block {
  margin-bottom: 48px;
  padding-bottom: 8px;
}

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

.page-contact .contact-block .chapter-head {
  margin-bottom: 16px;
}

.page-contact .contact-sub {
  font-family: var(--font-body);
  font-weight: 600;
  font-size: .95rem;
  letter-spacing: .04em;
  color: var(--forest);
  margin: 22px 0 10px;
}

.page-contact .path-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  background: rgba(22, 56, 46, .05);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin: 16px 0;
  max-width: 100%;
}

.page-contact .path-line code {
  font-size: .88rem;
  color: var(--night);
  word-break: break-all;
}

.page-contact .contact-bullets {
  list-style: none;
  margin: 0 0 18px;
  padding: 0;
}

.page-contact .contact-bullets li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .contact-bullets li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .7em;
  width: 8px;
  height: 1px;
  background: var(--gold);
}

.page-contact .contact-bullets code {
  font-size: .85rem;
  color: var(--forest);
}

.page-contact .contact-pin {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0;
  padding: 14px 0;
  border-top: 1px dashed var(--letter-dash);
  border-bottom: 1px dashed var(--letter-dash);
}

.page-contact .contact-pin__dot {
  flex: 0 0 auto;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--coral);
}

.page-contact .contact-pin__text {
  margin: 0;
  font-size: .95rem;
  color: var(--night);
}

.page-contact .contact-block__split {
  display: grid;
  gap: 24px;
}

.page-contact .contact-block__media .frame-media {
  margin: 0;
  width: 100%;
  height: auto;
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--paper);
}

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

.page-contact .contact-block__media figcaption {
  padding: 10px 12px;
  font-size: .82rem;
  line-height: 1.6;
  color: var(--stone);
  border-top: 1px solid var(--line-ink);
}

/* ---- 右侧窄栏 ---- */
.page-contact .contact-rail__card {
  background: var(--paper);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  padding: 20px 18px;
  margin-bottom: 22px;
  position: relative;
}

.page-contact .contact-rail__card::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 22px;
  height: 22px;
  background: linear-gradient(135deg, var(--porcelain) 0 50%, rgba(201, 162, 74, .35) 50% 100%);
}

.page-contact .contact-rail__text {
  font-size: .9rem;
  line-height: 1.75;
  color: var(--moss);
  margin: 6px 0 12px;
}

.page-contact .contact-rail__keys {
  font-size: .82rem;
  color: var(--forest);
  background: rgba(22, 56, 46, .06);
  border: 1px dashed var(--letter-dash);
  border-radius: var(--radius);
  padding: 8px 10px;
  margin: 0;
  text-align: center;
}

.page-contact .contact-rail__links {
  padding: 16px 0;
  border-top: 1px solid var(--line-ink);
}

.page-contact .contact-rail__links ul {
  list-style: none;
  margin: 10px 0 0;
  padding: 0;
}

.page-contact .contact-rail__links li {
  margin-bottom: 10px;
}

.page-contact .contact-rail__links a {
  color: var(--night);
  text-decoration: none;
  font-size: .93rem;
  border-bottom: 1px solid var(--gold);
  padding-bottom: 2px;
  transition: color .18s ease;
}

.page-contact .contact-rail__links a:hover,
.page-contact .contact-rail__links a:focus-visible {
  color: var(--coral-ink);
}

.page-contact .contact-rail__cta {
  display: block;
  text-align: center;
  text-decoration: none;
}

/* ---- 准备清单 ---- */
.page-contact .contact-prep {
  background: var(--paper);
  border-top: 1px solid var(--line-ink);
  border-bottom: 1px solid var(--line-ink);
  padding: 48px 0;
  margin-top: 64px;
}

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

.page-contact .prep-list__item label {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  background: var(--porcelain);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  cursor: pointer;
  line-height: 1.65;
  transition: border-color .18s ease, background .18s ease;
}

.page-contact .prep-list__item label:hover {
  border-color: var(--gold);
}

.page-contact .prep-list__item input[type="checkbox"] {
  flex: 0 0 auto;
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--forest);
  cursor: pointer;
}

.page-contact .prep-list__item input:checked + span {
  color: var(--stone);
  text-decoration: line-through;
  text-decoration-color: var(--pencil);
}

.page-contact .prep-list__item code {
  font-size: .85rem;
  color: var(--forest);
}

/* ---- 底部三栏收束 ---- */
.page-contact .contact-summary__grid {
  display: grid;
  gap: 20px;
}

.page-contact .contact-summary__col {
  background: var(--paper);
  border: 1px solid var(--line-ink);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.page-contact .contact-summary__value {
  font-size: .95rem;
  color: var(--night);
  margin: 8px 0 8px;
  word-break: break-all;
}

.page-contact .contact-summary__note {
  font-size: .87rem;
  line-height: 1.7;
  color: var(--stone);
  margin: 0;
}

.page-contact .contact-summary__meta {
  margin: 26px 0 0;
  font-size: .82rem;
  color: var(--stone);
  letter-spacing: .03em;
}

.page-contact .contact-summary__actions {
  margin-top: 20px;
}

.page-contact .contact-summary__actions .btn {
  cursor: pointer;
}

/* ---- 平板与桌面 ---- */
@media (min-width: 720px) {
  .page-contact .contact-letter {
    padding-top: calc(var(--header-h) + 40px);
  }

  .page-contact .contact-letter__inner {
    padding: 46px 48px 42px;
    grid-template-columns: minmax(0, 1.15fr) minmax(0, .85fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .contact-paths__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .prep-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px 18px;
  }

  .page-contact .contact-summary__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .contact-block__split {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, .75fr);
    align-items: start;
    gap: 32px;
  }

  .page-contact .section {
    margin-top: 80px;
  }

  .page-contact .contact-prep {
    padding: 64px 0;
    margin-top: 88px;
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-main__grid {
    grid-template-columns: minmax(0, 8fr) minmax(0, 4fr);
    gap: 56px;
    align-items: start;
  }

  .page-contact .contact-rail .rail-sticky {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }

  .page-contact .contact-card__more {
    max-height: 0;
    opacity: 0;
    overflow: hidden;
    padding-top: 0;
    margin-top: 0;
    border-top-color: transparent;
    transition: max-height .28s ease, opacity .28s ease, padding-top .28s ease, margin-top .28s ease;
  }

  .page-contact .contact-card:hover .contact-card__more,
  .page-contact .contact-card:focus-visible .contact-card__more,
  .page-contact .contact-card:focus-within .contact-card__more {
    max-height: 12rem;
    opacity: 1;
    padding-top: 10px;
    margin-top: 10px;
    border-top-color: var(--letter-dash);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .contact-copy,
  .page-contact .contact-card__more {
    transition: none;
  }

  .page-contact .contact-card:hover,
  .page-contact .contact-card:focus-visible {
    transform: none;
  }
}