.page-contact {
  --contact-radius: 16px;
  --board-radius: 20px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  padding-block: clamp(20px, 3vw, 36px) clamp(40px, 7vw, 88px);
  border-bottom: 1px solid var(--hair);
}

.page-contact .contact-hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
}

.page-contact .hero-main {
  position: relative;
}

.page-contact .hero-main .display-1 {
  margin-top: 12px;
  max-width: 14ch;
}

.page-contact .hl {
  color: var(--lime);
}

.page-contact .hero-side {
  display: grid;
  gap: 20px;
  align-content: end;
}

.page-contact .hero-side .lede {
  margin: 0;
}

.page-contact .hero-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-contact .hero-list li {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 6px;
  padding: 12px 0;
  border-bottom: 1px solid var(--hair);
  font-size: var(--s14);
  color: var(--ink);
}

.page-contact .hero-list .num {
  font-size: var(--s26);
  line-height: 1;
  color: var(--lime);
}

.page-contact .hero-unit {
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-contact .contact-hero-grid {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

  .page-contact .hero-side {
    padding-top: 34px;
  }
}

/* ---------- 合作类型 ---------- */
.page-contact .coop-head {
  max-width: 62ch;
}

.page-contact .coop-head .display-2 {
  margin-top: 10px;
}

.page-contact .coop-lede {
  margin-top: 14px;
}

.page-contact .coop-switch {
  margin-top: clamp(28px, 4vw, 48px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

.page-contact .coop-rail {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-contact .coop-tab {
  position: relative;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: baseline;
  gap: 4px 14px;
  width: 100%;
  padding: 16px 16px 16px 20px;
  text-align: left;
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--hair);
  color: var(--muted);
  font: inherit;
  cursor: pointer;
  transition: color 0.22s var(--ease), background-color 0.22s var(--ease);
}

.page-contact .coop-tab::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  bottom: 14px;
  width: 3px;
  border-radius: 2px;
  background: var(--lime);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform 0.26s var(--ease);
}

.page-contact .coop-tab:hover,
.page-contact .coop-tab:focus-visible {
  color: var(--ink);
  background: var(--panel);
}

.page-contact .coop-tab:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: -2px;
}

.page-contact .coop-tab[aria-selected="true"] {
  color: var(--ink);
  background: var(--panel);
}

.page-contact .coop-tab[aria-selected="true"]::before {
  transform: scaleY(1);
}

.page-contact .coop-tab-num {
  grid-row: 1 / span 2;
  font-size: var(--s26);
  line-height: 1;
  color: var(--muted);
  transition: color 0.22s var(--ease);
}

.page-contact .coop-tab[aria-selected="true"] .coop-tab-num {
  color: var(--lime);
}

.page-contact .coop-tab-name {
  font-size: var(--s16);
  font-weight: 600;
  letter-spacing: 0.01em;
}

.page-contact .coop-tab-for {
  grid-column: 2;
  font-size: var(--s12);
  letter-spacing: 0.05em;
  color: var(--muted-deep);
}

.page-contact .coop-stage {
  min-height: 0;
}

.page-contact .coop-panel {
  position: relative;
  padding: clamp(22px, 3vw, 34px);
  background: var(--raised);
  border: 1px solid var(--hair);
  border-radius: var(--contact-radius);
  box-shadow: var(--shadow-hair);
}

.page-contact .coop-panel:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-contact .coop-panel-title {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: var(--s26);
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
}

.page-contact .coop-panel + .coop-panel {
  margin-top: 20px;
}

.page-contact .coop-meta {
  margin: 22px 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-contact .coop-meta-row {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--hair);
}

.page-contact .coop-meta-row dt {
  font-size: var(--s12);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--lime);
}

.page-contact .coop-meta-row dd {
  margin: 0;
  font-size: var(--s14);
  line-height: 1.75;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-contact .coop-switch {
    grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
    gap: clamp(28px, 4vw, 60px);
    align-items: start;
  }

  .page-contact .coop-meta-row {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-contact .coop-meta-row dt {
    font-size: var(--s12);
  }
}

/* ---------- 四步流程 ---------- */
.page-contact .contact-flow {
  border-top: 1px solid var(--hair);
}

.page-contact .flow-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 56px);
}

.page-contact .flow-copy .display-2 {
  margin-top: 10px;
}

.page-contact .flow-copy .lede {
  margin-top: 14px;
}

.page-contact .flow-steps {
  list-style: none;
  margin: clamp(26px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
  counter-reset: flow;
}

.page-contact .flow-step {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--hair);
}

.page-contact .flow-step-num {
  font-size: var(--s26);
  line-height: 1.1;
  color: var(--lime);
}

.page-contact .flow-step-title {
  margin: 0 0 6px;
  font-size: var(--s16);
  font-weight: 600;
  color: var(--ink);
}

.page-contact .flow-step-body .body-copy {
  margin: 0;
  font-size: var(--s14);
}

.page-contact .flow-visual {
  margin: 0;
  align-self: start;
  border: 1px solid var(--hair);
  border-radius: var(--contact-radius);
  overflow: hidden;
  background: var(--panel);
  box-shadow: var(--shadow-hair);
}

.page-contact .flow-visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}

.page-contact .flow-visual figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--hair);
  font-size: var(--s12);
  letter-spacing: 0.03em;
  line-height: 1.7;
  color: var(--muted);
}

@media (min-width: 900px) {
  .page-contact .flow-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
  }

  .page-contact .flow-visual {
    position: sticky;
    top: 104px;
  }
}

/* ---------- 投稿标准 ---------- */
.page-contact .contact-contrib {
  border-top: 1px solid var(--hair);
}

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

.page-contact .contrib-head .display-2 {
  margin-top: 10px;
}

.page-contact .contrib-head .lede {
  margin-top: 14px;
}

.page-contact .contrib-grid {
  margin-top: clamp(26px, 4vw, 44px);
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-contact .contrib-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--hair);
}

.page-contact .contrib-num {
  display: inline-block;
  font-size: var(--s14);
  letter-spacing: 0.12em;
  color: var(--ember);
}

.page-contact .contrib-title {
  margin: 8px 0 8px;
  font-family: var(--font-display);
  font-size: var(--s20);
  font-weight: 600;
  color: var(--ink);
}

.page-contact .contrib-item .body-copy {
  margin: 0;
  font-size: var(--s14);
}

@media (min-width: 700px) {
  .page-contact .contrib-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 56px);
  }
}

@media (min-width: 1100px) {
  .page-contact .contrib-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

/* ---------- 反馈 ---------- */
.page-contact .contact-feedback {
  border-top: 1px solid var(--hair);
}

.page-contact .feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 56px);
}

.page-contact .feedback-copy .display-2 {
  margin-top: 10px;
}

.page-contact .feedback-copy .body-copy {
  margin-top: 14px;
}

.page-contact .feedback-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid var(--hair);
}

.page-contact .feedback-item {
  padding: 16px 0;
  border-bottom: 1px solid var(--hair);
}

.page-contact .feedback-item-title {
  margin: 0 0 6px;
  font-size: var(--s14);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--amber);
}

.page-contact .feedback-item .body-copy {
  margin: 0;
  font-size: var(--s14);
}

@media (min-width: 900px) {
  .page-contact .feedback-grid {
    grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
    align-items: start;
  }

  .page-contact .feedback-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(24px, 4vw, 48px);
  }
}

/* ---------- 常见对接问题 ---------- */
.page-contact .faq-head .display-2 {
  margin-top: 10px;
}

.page-contact .faq-list {
  margin-top: clamp(24px, 3vw, 36px);
  border-top: 1px solid var(--hair);
}

.page-contact .faq-item {
  border-bottom: 1px solid var(--hair);
}

.page-contact .faq-q {
  position: relative;
  padding: 18px 42px 18px 0;
  cursor: pointer;
  list-style: none;
  font-size: var(--s16);
  font-weight: 500;
  line-height: 1.6;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.page-contact .faq-q::-webkit-details-marker {
  display: none;
}

.page-contact .faq-q::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-num);
  font-size: var(--s20);
  line-height: 1;
  color: var(--lime);
  transition: transform 0.24s var(--ease), color 0.24s var(--ease);
}

.page-contact .faq-item[open] .faq-q::after {
  content: "–";
  color: var(--ember);
}

.page-contact .faq-q:hover {
  color: var(--lime);
}

.page-contact .faq-q:focus-visible {
  outline: 2px solid var(--lime);
  outline-offset: 2px;
}

.page-contact .faq-a {
  padding: 0 0 20px;
}

.page-contact .faq-a .body-copy {
  margin: 0;
  font-size: var(--s14);
}

/* ---------- 联系方式板 ---------- */
.page-contact .contact-board {
  margin-top: clamp(28px, 5vw, 72px);
  background: var(--paper);
  color: var(--paper-ink);
  border-top: 1px solid var(--hair);
}

.page-contact .board-photo {
  position: relative;
  height: clamp(140px, 22vw, 260px);
  overflow: hidden;
  background: var(--night);
}

.page-contact .board-photo img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.72;
}

.page-contact .board-inner {
  padding-block: clamp(32px, 5vw, 64px) clamp(36px, 5vw, 72px);
  color: var(--paper-ink);
}

.page-contact .board-head .display-2 {
  margin-top: 10px;
  color: var(--paper-ink);
}

.page-contact .board-head .eyebrow {
  color: var(--paper-muted);
}

.page-contact .board-rows {
  margin: clamp(24px, 3vw, 40px) 0 0;
  padding: 0;
  display: grid;
  gap: 0;
  border-top: 1px solid rgba(16, 22, 20, 0.16);
}

.page-contact .board-row {
  display: grid;
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid rgba(16, 22, 20, 0.16);
}

.page-contact .board-label {
  font-size: var(--s12);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--paper-muted);
}

.page-contact .board-value {
  margin: 0;
  font-family: var(--font-num);
  font-size: clamp(1.25rem, 4.2vw, 2.125rem);
  font-weight: 600;
  letter-spacing: -0.01em;
  line-height: 1.25;
  color: var(--paper-ink);
  overflow-wrap: anywhere;
}

.page-contact .board-value a {
  color: inherit;
  text-decoration: none;
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .board-value a:hover,
.page-contact .board-value a:focus-visible {
  color: #0B3A22;
  border-bottom-color: var(--lime);
}

.page-contact .board-note {
  margin: 0;
  font-size: var(--s14);
  line-height: 1.7;
  color: var(--paper-muted);
}

.page-contact .board-hours {
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 14px 18px;
  background: rgba(180, 255, 58, 0.28);
  border-left: 3px solid var(--lime);
  font-size: var(--s14);
  line-height: 1.7;
  color: var(--paper-ink);
}

.page-contact .board-links {
  margin: 20px 0 0;
  font-size: var(--s14);
  line-height: 1.9;
  color: var(--paper-muted);
}

.page-contact .board-links a {
  margin-inline: 2px;
  color: var(--paper-ink);
}

@media (min-width: 900px) {
  .page-contact .board-row {
    grid-template-columns: 130px minmax(0, 1fr) minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-contact .board-label {
    grid-row: 1;
    padding-top: 6px;
  }

  .page-contact .board-value {
    grid-row: 1;
  }

  .page-contact .board-note {
    grid-row: 1;
    padding-top: 6px;
  }
}

/* ---------- 减弱动效 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .coop-tab,
  .page-contact .coop-tab::before,
  .page-contact .faq-q::after,
  .page-contact .board-value a {
    transition: none;
  }
}