.page-contact {
  --pc-card-bg: var(--lantern);
  --pc-soft-bg: var(--paper-2);
  --pc-hair: rgba(28, 26, 23, .10);
  --pc-hair-strong: rgba(28, 26, 23, .22);
}

/* ---------- 页头 ---------- */
.page-contact .contact-head {
  padding-top: clamp(.5rem, 2vw, 1rem);
}
.page-contact .contact-head__inner {
  max-width: 66ch;
}
.page-contact .contact-head h1 {
  margin: .55rem 0 .9rem;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(1.85rem, 5.6vw, 3rem);
  line-height: 1.18;
  letter-spacing: -.02em;
  color: var(--ink);
}
.page-contact .contact-head .lead {
  margin: 0;
  font-size: clamp(.98rem, 2.1vw, 1.06rem);
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-contact .contact-head__actions {
  display: flex;
  flex-wrap: wrap;
  gap: .7rem;
  margin-top: 1.5rem;
}
.page-contact .contact-head__actions .btn {
  flex: 0 1 auto;
}
.page-contact .contact-head__capsule {
  margin-top: 1.5rem;
}

/* ---------- 双栏主体 ---------- */
.page-contact .contact-split-wrap {
  padding-top: clamp(1.5rem, 4vw, 2.5rem);
}
.page-contact .contact-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(1.6rem, 4vw, 3rem);
}
.page-contact .contact-split__main,
.page-contact .submission-rail {
  min-width: 0;
}

.page-contact .col-head {
  margin-bottom: 1.4rem;
}
.page-contact .col-head__title {
  margin: .5rem 0 .7rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.35rem, 3.4vw, 1.8rem);
  line-height: 1.28;
  letter-spacing: -.015em;
  color: var(--ink);
}
.page-contact .col-head__lead {
  margin: 0;
  color: var(--ink-soft);
  font-size: .97rem;
  line-height: 1.85;
}

/* ---------- 通道图 ---------- */
.page-contact .channel-figure {
  margin: 0 0 1.2rem;
  border: 1px solid var(--pc-hair);
  border-radius: var(--r-lg);
}
.page-contact .channel-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .channel-figure .img-frame__cap {
  padding: .7rem 1rem .85rem;
  font-size: .82rem;
  line-height: 1.7;
  color: var(--clay);
  background: var(--pc-soft-bg);
  margin: 0;
}

/* ---------- 通道卡片 ---------- */
.page-contact .channel-stack {
  display: grid;
  gap: .9rem;
}
.page-contact .channel-card {
  position: relative;
  overflow: hidden;
  padding: clamp(1.05rem, 2.6vw, 1.55rem) clamp(1.05rem, 2.6vw, 1.7rem);
  border: 1px solid var(--pc-hair);
  border-radius: var(--r-lg);
  background: var(--pc-card-bg);
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease), transform .22s var(--ease);
}
.page-contact .channel-card::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 4px;
  background: var(--pc-hair-strong);
  transition: background .22s var(--ease);
}
.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: rgba(224, 138, 43, .5);
  box-shadow: 0 12px 30px -20px rgba(28, 26, 23, .45);
}
.page-contact .channel-card:hover::before,
.page-contact .channel-card:focus-within::before {
  background: var(--amber);
}
.page-contact .channel-card__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: .75rem;
  margin-bottom: .15rem;
}
.page-contact .channel-card__num {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--clay);
}
.page-contact .channel-card__title {
  margin: .55rem 0 .6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.1rem, 2.6vw, 1.32rem);
  line-height: 1.3;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-contact .channel-card__value {
  display: block;
  margin: 0 0 .75rem;
  padding: .5rem .8rem;
  border: 1px dashed var(--pc-hair-strong);
  border-radius: var(--r-sm);
  background: var(--pc-soft-bg);
  font-size: clamp(.86rem, 2vw, 1rem);
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
  overflow-wrap: anywhere;
  word-break: break-word;
}
.page-contact .channel-card__desc {
  margin: 0 0 .95rem;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--ink-soft);
}
.page-contact .channel-card__foot,
.page-contact .rail-card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: .6rem .85rem;
}
.page-contact .copy-state {
  font-size: 12px;
  line-height: 1.4;
  color: var(--jade);
}
.page-contact .copy-state:empty {
  display: none;
}

/* ---------- 右栏 ---------- */
.page-contact .submission-rail {
  display: grid;
  gap: 1rem;
}
.page-contact .rail-card {
  padding: clamp(1.05rem, 2.6vw, 1.6rem);
  border: 1px solid var(--pc-hair);
  border-radius: var(--r-lg);
  background: var(--pc-soft-bg);
}
.page-contact .rail-card--tpl {
  background: var(--pc-card-bg);
}
.page-contact .rail-card__title {
  margin: .5rem 0 .6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.12rem, 2.8vw, 1.38rem);
  line-height: 1.32;
  letter-spacing: -.01em;
  color: var(--ink);
}
.page-contact .rail-card__hint {
  margin: 0 0 1rem;
  font-size: .92rem;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 清单 */
.page-contact .checklist-group {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: .05rem;
}
.page-contact .checklist {
  display: flex;
  align-items: flex-start;
  gap: .7rem;
  padding: .58rem .6rem;
  border-radius: var(--r-sm);
  font-size: .93rem;
  line-height: 1.7;
  color: var(--ink-soft);
  cursor: pointer;
  transition: background .18s var(--ease), color .18s var(--ease);
}
.page-contact .checklist:hover {
  background: rgba(246, 199, 122, .24);
}
.page-contact .checklist:has(input:checked) {
  color: var(--ink);
}
.page-contact .checklist input {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  flex: none;
  width: 18px;
  height: 18px;
  margin: .3rem 0 0;
  border: 1.5px solid var(--pc-hair-strong);
  border-radius: 5px;
  background: var(--lantern);
  cursor: pointer;
  transition: background .18s var(--ease), border-color .18s var(--ease);
}
.page-contact .checklist input:checked {
  background: var(--jade);
  border-color: var(--jade);
}
.page-contact .checklist input:checked::after {
  content: "";
  position: absolute;
  left: 5px;
  top: 1px;
  width: 5px;
  height: 10px;
  border: solid var(--lantern);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}
.page-contact .checklist input:focus-visible {
  outline: 2px solid var(--amber);
  outline-offset: 2px;
}
.page-contact .checklist__ready {
  display: inline-block;
  margin: 0;
  padding: .38rem .85rem;
  border: 1px dashed var(--pc-hair-strong);
  border-radius: var(--r-pill);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--ink-soft);
  background: transparent;
  transition: background .24s var(--ease), color .24s var(--ease), border-color .24s var(--ease);
}
.page-contact .checklist-group:not(:has(input:not(:checked))) ~ .checklist__ready {
  border-style: solid;
  border-color: var(--jade);
  background: var(--jade);
  color: var(--lantern);
}

/* 右栏配图 */
.page-contact .rail-figure {
  margin: 0;
  border: 1px solid var(--pc-hair);
  border-radius: var(--r-lg);
}
.page-contact .rail-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .rail-figure .img-frame__cap {
  margin: 0;
  padding: .65rem .95rem .8rem;
  font-size: .8rem;
  line-height: 1.7;
  color: var(--clay);
  background: var(--pc-card-bg);
}

/* 信件模板 */
.page-contact .mail-tpl {
  margin: 0 0 1rem;
  padding: .9rem 1rem;
  border: 1px solid var(--pc-hair);
  border-left: 3px solid var(--amber);
  border-radius: var(--r-sm);
  background: var(--pc-soft-bg);
  font-size: .8rem;
  line-height: 1.9;
  color: var(--ink);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* ---------- 处理节奏 ---------- */
.page-contact .contact-rhythm {
  padding-top: clamp(2.4rem, 7vw, 4.5rem);
}
.page-contact .rhythm-list {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
}
.page-contact .rhythm-item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .35rem 1.1rem;
  padding: 1.15rem 0;
  border-top: 1px solid var(--pc-hair);
}
.page-contact .rhythm-item:last-child {
  border-bottom: 1px solid var(--pc-hair);
}
.page-contact .rhythm-item__num {
  padding-top: .18rem;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--amber-deep);
}
.page-contact .rhythm-item__body h3 {
  margin: 0 0 .35rem;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--ink);
}
.page-contact .rhythm-item__body p {
  margin: 0;
  max-width: 62ch;
  font-size: .94rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 纠错与协作 ---------- */
.page-contact .contact-routes {
  padding-top: clamp(2.4rem, 7vw, 4.5rem);
}
.page-contact .route-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: .9rem;
  margin-top: 1.8rem;
}
.page-contact .route-card {
  display: grid;
  align-content: start;
  gap: .55rem;
  padding: clamp(1.05rem, 2.6vw, 1.5rem);
  border: 1px solid var(--pc-hair);
  border-radius: var(--r-md);
  background: var(--pc-card-bg);
  transition: border-color .22s var(--ease), transform .22s var(--ease);
}
.page-contact .route-card:hover {
  border-color: rgba(224, 138, 43, .5);
  transform: translateY(-2px);
}
.page-contact .route-card .tag {
  justify-self: start;
}
.page-contact .route-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.08rem;
  line-height: 1.4;
  color: var(--ink);
}
.page-contact .route-card p {
  margin: 0;
  font-size: .92rem;
  line-height: 1.82;
  color: var(--ink-soft);
}
.page-contact .route-card__mail {
  padding-top: .35rem;
  border-top: 1px solid var(--pc-hair);
  font-size: .8rem;
  color: var(--amber-deep);
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* ---------- 常被问到的几件事 ---------- */
.page-contact .contact-topics-wrap {
  padding-top: clamp(2.4rem, 7vw, 4.5rem);
}
.page-contact .contact-topics {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
}
.page-contact .contact-topics__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: .25rem 1.1rem;
  padding: 1.1rem 0;
  border-top: 1px solid var(--pc-hair);
}
.page-contact .contact-topics__item:last-child {
  border-bottom: 1px solid var(--pc-hair);
}
.page-contact .contact-topics__num {
  padding-top: .2rem;
  font-size: 12px;
  letter-spacing: .14em;
  color: var(--clay);
}
.page-contact .contact-topics__title {
  margin: 0;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.02rem;
  line-height: 1.5;
  color: var(--ink);
}
.page-contact .contact-topics__meta {
  grid-column: 2;
  margin: 0;
  max-width: 64ch;
  font-size: .92rem;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* ---------- 收束条 ---------- */
.page-contact .contact-footline-wrap {
  padding-top: clamp(2.4rem, 7vw, 4.5rem);
  padding-bottom: clamp(2rem, 6vw, 3.5rem);
}
.page-contact .footline {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 1.4rem;
  padding: clamp(1.2rem, 3vw, 1.9rem);
  border: 1px solid var(--pc-hair);
  border-left: 4px solid var(--amber);
  border-radius: var(--r-lg);
  background: linear-gradient(135deg, rgba(246, 199, 122, .3), rgba(246, 240, 228, .7) 62%);
}
.page-contact .footline__col {
  min-width: 0;
}
.page-contact .footline__value {
  margin: .5rem 0 .4rem;
  font-size: .96rem;
  line-height: 1.75;
  color: var(--ink);
  overflow-wrap: anywhere;
}
.page-contact .footline__note {
  margin: 0;
  font-size: .86rem;
  line-height: 1.78;
  color: var(--ink-soft);
}
.page-contact .footline__link {
  color: var(--amber-deep);
  text-decoration: underline;
  text-underline-offset: .22em;
}
.page-contact .footline__link:hover {
  color: var(--cinnabar);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .route-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
  .page-contact .footline {
    grid-template-columns: minmax(0, 1.45fr) minmax(0, 1fr);
    align-items: start;
    gap: 2rem;
  }
  .page-contact .rhythm-item {
    grid-template-columns: 4.5rem minmax(0, 1fr);
    padding: 1.35rem 0;
  }
}

@media (min-width: 1020px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
    align-items: start;
    gap: clamp(2rem, 4vw, 3.25rem);
  }
  .page-contact .contact-topics__item {
    grid-template-columns: 3.5rem minmax(0, 1fr);
  }
  .page-contact .rhythm-item__body p {
    font-size: .96rem;
  }
}

@media (max-width: 520px) {
  .page-contact .contact-head__actions .btn {
    flex: 1 1 100%;
    text-align: center;
  }
  .page-contact .channel-card__head {
    align-items: flex-start;
  }
  .page-contact .rail-card__foot .btn,
  .page-contact .channel-card__foot .btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .route-card,
  .page-contact .checklist,
  .page-contact .checklist input,
  .page-contact .checklist__ready {
    transition: none;
  }
  .page-contact .route-card:hover {
    transform: none;
  }
}