.page-contact {
  --contact-gap: clamp(20px, 3vw, 36px);
}

.page-contact img {
  max-width: 100%;
  height: auto;
  display: block;
}

.page-contact .lead {
  max-width: 62ch;
}

/* ---------- 首屏框景 ---------- */
.page-contact .contact-hero {
  padding: clamp(18px, 3vw, 30px) 0 clamp(44px, 7vw, 84px);
}

.page-contact .contact-hero__grid {
  position: relative;
  display: grid;
  gap: var(--contact-gap);
  padding: clamp(22px, 4vw, 44px) clamp(18px, 3.5vw, 40px);
  background: var(--paper);
  border: 1px solid var(--rule);
}

.page-contact .contact-hero__grid::before,
.page-contact .contact-hero__grid::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--gold);
  pointer-events: none;
}

.page-contact .contact-hero__grid::before {
  top: -1px;
  left: -1px;
  border-right: 0;
  border-bottom: 0;
}

.page-contact .contact-hero__grid::after {
  right: -1px;
  bottom: -1px;
  border-top: 0;
  border-left: 0;
}

.page-contact .contact-hero__main h1 {
  margin: 10px 0 18px;
  font-size: clamp(32px, 8vw, 62px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

/* ---------- 坐标卡 ---------- */
.page-contact .coord-card {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 28px);
  background: var(--ink);
  color: var(--sand);
  border-radius: var(--radius);
  background-image:
    repeating-linear-gradient(0deg, rgba(244, 241, 234, 0.07) 0 1px, transparent 1px 26px),
    repeating-linear-gradient(90deg, rgba(244, 241, 234, 0.07) 0 1px, transparent 1px 26px);
}

.page-contact .coord-card__title {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gold);
}

.page-contact .coord-card__list {
  margin: 0;
}

.page-contact .coord-card__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--rule-dark);
}

.page-contact .coord-card__row:last-child {
  border-bottom: 0;
}

.page-contact .coord-card__row dt {
  font-size: 14px;
  color: rgba(244, 241, 234, 0.72);
}

.page-contact .coord-card__row dd {
  margin: 0;
  font-weight: 700;
  font-size: 16px;
  color: var(--white);
}

.page-contact .coord-card__hint {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--rule-dark);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(244, 241, 234, 0.78);
}

/* ---------- 合作类型切换 ---------- */
.page-contact .coop .section-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .coop-switch {
  position: relative;
}

.page-contact .coop-switch__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .coop-switch__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-bottom: clamp(20px, 3vw, 30px);
  border-bottom: 1px solid var(--rule);
}

.page-contact .coop-switch__tab {
  display: inline-flex;
  align-items: center;
  padding: 10px 16px;
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  cursor: pointer;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease), color 0.18s var(--ease);
}

.page-contact .coop-switch__tab:hover {
  border-color: var(--gold-deep);
  color: var(--gold-deep);
}

.page-contact #coop-community:checked ~ .coop-switch__tabs [for="coop-community"],
.page-contact #coop-writing:checked ~ .coop-switch__tabs [for="coop-writing"],
.page-contact #coop-observer:checked ~ .coop-switch__tabs [for="coop-observer"],
.page-contact #coop-event:checked ~ .coop-switch__tabs [for="coop-event"] {
  background: var(--gold);
  border-color: var(--gold);
  color: var(--ink);
}

.page-contact .coop-switch__panels {
  padding-top: clamp(22px, 3.5vw, 34px);
}

.page-contact .coop-switch__panel {
  display: none;
  padding-left: clamp(14px, 2.5vw, 26px);
  border-left: 2px solid var(--gold);
  animation: contact-panel-in 0.22s var(--ease);
}

.page-contact #coop-community:checked ~ .coop-switch__panels #panel-community,
.page-contact #coop-writing:checked ~ .coop-switch__panels #panel-writing,
.page-contact #coop-observer:checked ~ .coop-switch__panels #panel-observer,
.page-contact #coop-event:checked ~ .coop-switch__panels #panel-event {
  display: block;
}

.page-contact .coop-switch__panel h3 {
  margin: 0 0 12px;
  font-size: clamp(20px, 3.4vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--ink);
}

.page-contact .coop-switch__panel p {
  margin: 0 0 12px;
  max-width: 68ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .coop-switch__panel p:last-child {
  margin-bottom: 0;
}

@keyframes contact-panel-in {
  from { opacity: 0; transform: translateY(6px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---------- 联系通道（深色块） ---------- */
.page-contact .channels {
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink);
  color: var(--sand);
}

.page-contact .channels__grid {
  display: grid;
  gap: clamp(28px, 5vw, 56px);
}

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

.page-contact .channels__figure img {
  width: 100%;
  border-radius: var(--radius);
  border: 1px solid var(--rule-dark);
  object-fit: cover;
}

.page-contact .channels__caption {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: rgba(244, 241, 234, 0.6);
}

.page-contact .channels h2 {
  margin: 10px 0 16px;
  font-size: clamp(28px, 5vw, 42px);
  font-weight: 900;
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--white);
}

.page-contact .channels .lead {
  margin: 0 0 clamp(22px, 3.5vw, 34px);
  font-size: 16px;
  line-height: 1.78;
  color: rgba(244, 241, 234, 0.82);
}

.page-contact .channels__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 18px;
}

.page-contact .channels__item {
  padding: 18px 0 0;
  border-top: 1px solid var(--rule-dark);
}

.page-contact .channels__address {
  display: block;
  margin: 10px 0 8px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--gold);
  text-decoration: none;
  overflow-wrap: anywhere;
}

.page-contact a.channels__address:hover {
  color: var(--gold-pale);
  text-decoration: underline;
  text-underline-offset: 4px;
}

.page-contact .channels__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.76);
}

/* ---------- 流程 ---------- */
.page-contact .flow .section-head {
  margin-bottom: clamp(24px, 4vw, 40px);
}

.page-contact .flow__steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(20px, 3vw, 30px);
  counter-reset: flowstep;
}

.page-contact .flow__step {
  position: relative;
  padding: 0 0 0 56px;
}

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  left: 17px;
  top: 34px;
  bottom: -22px;
  width: 1px;
  background: var(--rule);
}

.page-contact .flow__step:last-child::before {
  display: none;
}

.page-contact .flow__num {
  position: absolute;
  left: 0;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background: var(--gold-pale);
  border: 1px solid var(--gold);
  border-radius: 50%;
}

.page-contact .flow__step h3 {
  margin: 5px 0 8px;
  font-size: 19px;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .flow__step p {
  margin: 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .flow__note {
  margin: clamp(26px, 4vw, 38px) 0 0;
  padding: 16px 18px;
  max-width: 72ch;
  background: var(--gold-pale);
  border-left: 3px solid var(--gold-deep);
  color: var(--ink);
  font-size: 15px;
  line-height: 1.75;
}

/* ---------- 服务地区与印章 ---------- */
.page-contact .region__grid {
  display: grid;
  gap: clamp(28px, 4vw, 52px);
  align-items: center;
}

.page-contact .region__body h2 {
  margin: 10px 0 16px;
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 900;
  line-height: 1.18;
  color: var(--ink);
}

.page-contact .region__body p {
  margin: 0 0 12px;
  max-width: 58ch;
  font-size: 16px;
  line-height: 1.78;
  color: var(--ink-soft);
}

.page-contact .region__stamp {
  position: relative;
  padding: clamp(22px, 4vw, 34px);
  text-align: center;
  background: var(--paper);
  border: 2px solid var(--gold-deep);
  border-radius: var(--radius);
  transform: rotate(-1.5deg);
  box-shadow: 0 0 0 1px var(--gold-pale) inset;
}

.page-contact .region__stamp-label {
  display: inline-block;
  padding: 3px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--sand);
  background: var(--gold-deep);
  border-radius: 2px;
}

.page-contact .region__stamp-code {
  margin: 16px 0 0;
  font-size: clamp(16px, 3vw, 21px);
  font-weight: 700;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .region__stamp-rule {
  display: block;
  width: 48px;
  height: 2px;
  margin: 16px auto;
  background: var(--rule-strong);
}

.page-contact .region__stamp-area {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .region__stamp-time {
  margin: 8px 0 0;
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--muted);
}

/* ---------- 联系资料 ---------- */
.page-contact .address {
  position: relative;
  overflow: hidden;
  padding: clamp(48px, 8vw, 96px) 0;
  background: var(--ink);
}

.page-contact .address__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
}

.page-contact .address__inner {
  position: relative;
}

.page-contact .address__card {
  max-width: 720px;
  padding: clamp(22px, 4vw, 40px);
  background: rgba(26, 26, 26, 0.88);
  border: 1px solid var(--rule-dark);
  border-radius: var(--radius);
  backdrop-filter: blur(2px);
}

.page-contact .address__card h2 {
  margin: 10px 0 22px;
  font-size: clamp(26px, 4.6vw, 38px);
  font-weight: 900;
  line-height: 1.2;
  color: var(--white);
}

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

.page-contact .address__row {
  display: grid;
  gap: 4px;
  padding: 13px 0;
  border-bottom: 1px solid var(--rule-dark);
}

.page-contact .address__row:first-child {
  border-top: 1px solid var(--rule-dark);
}

.page-contact .address__row dt {
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-contact .address__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--sand);
  overflow-wrap: anywhere;
}

.page-contact .address__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(244, 241, 234, 0.7);
}

/* ---------- 顺路看看 ---------- */
.page-contact .quicklinks .section-head {
  margin-bottom: clamp(22px, 3.5vw, 34px);
}

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

.page-contact .quicklinks__item {
  border-top: 1px solid var(--rule);
}

.page-contact .quicklinks__item:last-child {
  border-bottom: 1px solid var(--rule);
}

.page-contact .quicklinks__link {
  display: grid;
  gap: 6px;
  padding: 18px 0 18px 4px;
  text-decoration: none;
  transition: background 0.18s var(--ease), padding-left 0.18s var(--ease);
}

.page-contact .quicklinks__link:hover,
.page-contact .quicklinks__link:focus-visible {
  background: var(--gold-pale);
  padding-left: 14px;
}

.page-contact .quicklinks__label {
  font-size: 18px;
  font-weight: 800;
  color: var(--ink);
}

.page-contact .quicklinks__desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
}

/* ---------- 自适应 ---------- */
@media (min-width: 700px) {
  .page-contact .flow__steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 48px);
  }

  .page-contact .flow__step::before {
    display: none;
  }

  .page-contact .channels__address {
    font-size: 18px;
  }

  .page-contact .address__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 18px;
  }

  .page-contact .quicklinks__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }

  .page-contact .quicklinks__item:nth-last-child(2) {
    border-bottom: 1px solid var(--rule);
  }
}

@media (min-width: 960px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-contact .channels__grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 7fr);
    align-items: start;
  }

  .page-contact .channels__figure {
    position: sticky;
    top: 96px;
  }

  .page-contact .region__grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 4fr);
  }

  .page-contact .flow__steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

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

  .page-contact .quicklinks__item:nth-last-child(2) {
    border-bottom: 0;
  }

  .page-contact .quicklinks__item:nth-child(3n) ~ .quicklinks__item {
    border-bottom: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-switch__panel {
    animation: none;
  }

  .page-contact .coop-switch__tab,
  .page-contact .quicklinks__link {
    transition: none;
  }
}