.page-contact {
  --c-rule: rgba(143, 163, 157, 0.22);
  --c-rule-strong: rgba(143, 163, 157, 0.42);
  --c-paper-line: rgba(69, 76, 73, 0.3);
  background-color: var(--ink);
  color: var(--paper);
  font-family: var(--font-body);
  padding-bottom: clamp(56px, 9vw, 112px);
  overflow-x: hidden;
}

.page-contact .contact-section {
  padding-top: clamp(52px, 8vw, 96px);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(36px, 6vw, 72px) 0 clamp(44px, 6vw, 76px);
  border-bottom: 1px solid var(--c-rule);
  background-image: radial-gradient(660px 300px at 90% 0%, rgba(53, 230, 196, 0.11), transparent 72%);
}

.page-contact .crumbs {
  font-size: 13px;
  letter-spacing: 0.05em;
  color: var(--cold);
}

.page-contact .crumbs__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 clamp(22px, 4vw, 34px);
  padding: 0;
  list-style: none;
}

.page-contact .crumbs__list li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--rock);
}

.page-contact .crumbs__list a {
  color: var(--cold);
  text-decoration: none;
  border-bottom: 1px solid transparent;
}

.page-contact .crumbs__list a:hover,
.page-contact .crumbs__list a:focus-visible {
  color: var(--cyan);
  border-bottom-color: var(--cyan);
}

.page-contact .contact-hero__title {
  margin: 14px 0 0;
  max-width: 18ch;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(38px, 7.4vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.02em;
  color: var(--paper);
}

.page-contact .contact-hero__line {
  margin: clamp(20px, 3vw, 28px) 0 0;
  max-width: 48ch;
  padding-left: 16px;
  border-left: 2px solid var(--cyan);
  font-size: clamp(15px, 2.4vw, 17px);
  line-height: 1.8;
  color: var(--cold);
}

/* ---------- 章节头 ---------- */
.page-contact .section-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  margin-bottom: clamp(22px, 4vw, 40px);
}

.page-contact .chapter-num {
  flex: none;
  font-family: var(--font-serif);
  font-size: 14px;
  letter-spacing: 0.26em;
  color: var(--clay);
}

.page-contact .section-head h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(23px, 4.2vw, 36px);
  line-height: 1.18;
  letter-spacing: -0.01em;
}

/* ---------- 01 渠道 ---------- */
.page-contact .channels-grid {
  display: grid;
  gap: clamp(18px, 3vw, 30px);
}

.page-contact .channels-left {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .chan-card {
  position: relative;
  margin: 0;
  padding: 20px 22px 20px;
  background: var(--paper);
  color: var(--char);
  border: 1px solid var(--rock);
  border-radius: var(--radius);
  box-shadow: 6px 6px 0 rgba(69, 76, 73, 0.35);
}

.page-contact .chan-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 0 22px 22px 0;
  border-color: transparent var(--clay) transparent transparent;
}

.page-contact .chan-card__tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid rgba(20, 119, 107, 0.45);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--deep);
}

.page-contact .chan-card__label {
  margin: 12px 0 0;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(16, 19, 20, 0.62);
}

.page-contact .chan-card__value {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: clamp(22px, 4.6vw, 28px);
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--char);
  overflow-wrap: anywhere;
}

.page-contact .chan-card__value--mail {
  font-size: clamp(15px, 2.9vw, 21px);
  line-height: 1.35;
}

.page-contact .chan-card__value--addr {
  font-family: var(--font-body);
  font-size: clamp(16px, 2.8vw, 20px);
  font-weight: 600;
  line-height: 1.5;
}

.page-contact .chan-card__note {
  margin: 12px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--c-paper-line);
  font-size: 14px;
  line-height: 1.7;
  color: rgba(16, 19, 20, 0.72);
}

.page-contact .channels-right {
  position: relative;
  padding: clamp(20px, 3vw, 34px);
  border: 1px solid var(--c-rule);
  border-radius: var(--radius);
  background: linear-gradient(158deg, rgba(30, 59, 49, 0.62), rgba(12, 31, 26, 0.1) 74%);
}

.page-contact .channels-right > *:not(.chan-map) {
  position: relative;
}

.page-contact .chan-map {
  position: absolute;
  inset: 0;
  margin: 0;
  overflow: hidden;
  opacity: 0.16;
  pointer-events: none;
}

.page-contact .chan-map img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-contact .channels-right h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 3vw, 24px);
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-contact .channels-right h3:not(:first-of-type) {
  margin-top: clamp(28px, 4vw, 38px);
}

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

.page-contact .topic-list li {
  position: relative;
  padding: 14px 0 14px 24px;
  border-top: 1px solid var(--c-rule);
  font-size: 15px;
  line-height: 1.72;
  color: var(--cold);
}

.page-contact .topic-list li:last-child {
  border-bottom: 1px solid var(--c-rule);
}

.page-contact .topic-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 23px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(53, 230, 196, 0.14);
}

.page-contact .topic-list strong {
  display: block;
  margin-bottom: 2px;
  font-size: 16px;
  font-weight: 600;
  color: var(--paper);
}

.page-contact .right-note {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--cold);
}

/* ---------- 02 准备清单（浅纸分区） ---------- */
.page-contact .contact-prep {
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(44px, 7vw, 84px) 0;
  background: var(--paper);
  color: var(--char);
  border-top: 1px solid var(--rock);
  border-bottom: 1px solid var(--rock);
}

.page-contact .contact-prep .chapter-num {
  color: var(--clay);
}

.page-contact .prep-grid {
  display: grid;
  gap: clamp(26px, 4vw, 44px);
}

.page-contact .prep-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .prep-list li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--c-paper-line);
}

.page-contact .prep-list li:last-child {
  border-bottom: 1px solid var(--c-paper-line);
}

.page-contact .prep-list__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--deep);
  padding-top: 3px;
}

.page-contact .prep-list strong {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(18px, 2.8vw, 22px);
  font-weight: 700;
  letter-spacing: 0.01em;
  color: var(--char);
}

.page-contact .prep-list p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: rgba(16, 19, 20, 0.74);
}

.page-contact .prep-media {
  margin: 0;
  align-self: start;
  border: 1px solid var(--rock);
  background: var(--char);
  box-shadow: 8px 8px 0 rgba(69, 76, 73, 0.22);
}

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

.page-contact .prep-media .media__caption {
  margin: 0;
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--cold);
  background: var(--char);
  border-top: 1px solid var(--rock);
}

/* ---------- 03 合作 ---------- */
.page-contact .contact-coop {
  margin-top: clamp(48px, 7vw, 96px);
  padding: clamp(44px, 7vw, 84px) 0;
  background: var(--char);
  border-top: 1px solid var(--c-rule);
  border-bottom: 1px solid var(--c-rule);
}

.page-contact .coop-grid {
  display: grid;
  gap: clamp(26px, 4vw, 48px);
}

.page-contact .coop-intro h2 {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(25px, 4.6vw, 40px);
  line-height: 1.16;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .coop-intro p {
  margin: 16px 0 0;
  max-width: 40ch;
  font-size: 15px;
  line-height: 1.8;
  color: var(--cold);
}

.page-contact .coop-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: clamp(20px, 3vw, 28px);
}

.page-contact .coop-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .coop-list li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 12px;
  padding: 18px 0;
  border-top: 1px solid var(--c-rule);
}

.page-contact .coop-list li:last-child {
  border-bottom: 1px solid var(--c-rule);
}

.page-contact .coop-list__num {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--cyan);
  padding-top: 3px;
}

.page-contact .coop-list h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(18px, 2.8vw, 22px);
  letter-spacing: 0.01em;
  color: var(--paper);
}

.page-contact .coop-list p {
  margin: 6px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--cold);
}

/* ---------- 04 地址与备案 ---------- */
.page-contact .addr-grid {
  display: grid;
  gap: clamp(24px, 4vw, 44px);
}

.page-contact .addr-main {
  padding-left: 18px;
  border-left: 3px solid var(--clay);
}

.page-contact .addr-main__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.14em;
  color: var(--clay);
}

.page-contact .addr-main__text {
  margin: 10px 0 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(22px, 4vw, 34px);
  line-height: 1.32;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .addr-main__note {
  margin: 14px 0 0;
  max-width: 34ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--cold);
}

.page-contact .addr-meta {
  margin: 0;
  display: grid;
  gap: 0;
}

.page-contact .addr-meta > div {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-top: 1px solid var(--c-rule);
}

.page-contact .addr-meta > div:last-child {
  border-bottom: 1px solid var(--c-rule);
}

.page-contact .addr-meta dt {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--cold);
}

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

.page-contact .addr-meta dd.mono {
  font-family: var(--font-mono);
  font-size: clamp(14px, 2.4vw, 16px);
  letter-spacing: 0.01em;
}

.page-contact .place-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px 28px;
  margin-top: clamp(26px, 4vw, 38px);
  padding-top: 20px;
  border-top: 1px solid var(--c-rule);
}

.page-contact .place-links .cta-link {
  font-size: 14px;
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(53, 230, 196, 0.42);
  padding-bottom: 2px;
}

.page-contact .place-links .cta-link:hover,
.page-contact .place-links .cta-link:focus-visible {
  color: var(--orange);
  border-bottom-color: var(--orange);
}

/* ---------- 断点 ---------- */
@media (min-width: 720px) {
  .page-contact .prep-grid {
    grid-template-columns: 1fr 0.82fr;
    align-items: start;
  }

  .page-contact .addr-grid {
    grid-template-columns: 1.05fr 0.95fr;
    align-items: start;
  }
}

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

  .page-contact .coop-grid {
    grid-template-columns: 4fr 8fr;
    align-items: start;
  }

  .page-contact .coop-intro {
    padding-right: 12px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .chan-card,
  .page-contact .prep-media {
    box-shadow: none;
  }
}