.page-contact {
  --contact-soft: #5A6B78;
}

.page-contact [id] {
  scroll-margin-top: 7rem;
}

.page-contact .flag-rule {
  display: flex;
  width: 96px;
  height: 4px;
  margin-bottom: 1.4rem;
}

.page-contact .flag-rule i {
  flex: 1 1 0;
}

.page-contact .flag-rule i:nth-child(1) { background: var(--flag-blue); }
.page-contact .flag-rule i:nth-child(2) { background: var(--flag-yellow); }
.page-contact .flag-rule i:nth-child(3) { background: var(--flag-red); }
.page-contact .flag-rule i:nth-child(4) { background: var(--flag-green); }
.page-contact .flag-rule i:nth-child(5) { background: var(--violet); }

/* ---------- 页面标题区 ---------- */
.page-contact .page-head {
  padding: clamp(1.75rem, 4.5vw, 3rem) 0 clamp(2.5rem, 6vw, 4.5rem);
}

.page-contact .page-head h1 {
  max-width: 18ch;
  margin: .7rem 0 1.1rem;
}

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

.page-contact .page-head__quick {
  display: flex;
  flex-wrap: wrap;
  gap: .75rem;
  margin-top: 1.85rem;
}

/* ---------- 合作类型分段切换 ---------- */
.page-contact .coop-tabs {
  margin-top: clamp(1.5rem, 3.5vw, 2.5rem);
}

.page-contact .tablist {
  display: flex;
  flex-wrap: wrap;
  border-bottom: 1px solid var(--line);
}

.page-contact .tab {
  appearance: none;
  background: transparent;
  border: 0;
  border-bottom: 3px solid transparent;
  margin-bottom: -1px;
  padding: .9rem 1.1rem;
  font: inherit;
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--contact-soft);
  cursor: pointer;
  transition: color .2s ease, border-color .2s ease;
}

.page-contact .tab:hover {
  color: var(--sky);
}

.page-contact .tab[aria-selected="true"] {
  color: var(--ink);
  border-bottom-color: var(--flag-yellow);
}

.page-contact .tab:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 3px;
}

.page-contact .coop-panel {
  padding-top: clamp(1.5rem, 3.5vw, 2.25rem);
}

.page-contact .coop-panel__grid {
  display: grid;
  gap: 1.5rem;
}

.page-contact .coop-panel__cell {
  border-left: 3px solid var(--flag-blue);
  padding-left: 1.05rem;
}

.page-contact .coop-panel__cell:nth-child(2) { border-left-color: var(--flag-green); }
.page-contact .coop-panel__cell:nth-child(3) { border-left-color: var(--flag-yellow); }

.page-contact .coop-panel__cell h3 {
  margin: 0 0 .5rem;
  font-size: .92rem;
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--contact-soft);
}

.page-contact .coop-panel__cell p {
  margin: 0;
  line-height: 1.8;
}

@media (min-width: 760px) {
  .page-contact .coop-panel__grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 2rem;
  }
}

/* ---------- 双栏：联系卡片 / 合作流程 ---------- */
.page-contact .split {
  display: grid;
  gap: clamp(2.25rem, 5vw, 3.5rem);
}

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

  .page-contact .split__aside {
    padding-right: clamp(2rem, 4.5vw, 3.75rem);
  }

  .page-contact .split__main {
    border-left: 1px solid var(--line);
    padding-left: clamp(2rem, 4.5vw, 3.75rem);
  }
}

.page-contact .contact-wall {
  display: grid;
  gap: .9rem;
  margin-top: 1.6rem;
}

.page-contact .contact-card {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.1rem 1.2rem 1.3rem;
  box-shadow: var(--shadow-soft);
  transition: border-color .22s ease, transform .22s ease, box-shadow .22s ease;
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  border-color: var(--sky);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lift);
}

.page-contact .contact-card--tall {
  padding-bottom: 2.1rem;
}

.page-contact .contact-card__value {
  margin: .65rem 0 .45rem;
  font-size: clamp(1.02rem, 2.4vw, 1.28rem);
  font-weight: 700;
  letter-spacing: -.01em;
  line-height: 1.45;
  overflow-wrap: anywhere;
}

.page-contact .contact-card__note {
  margin: 0;
  color: var(--contact-soft);
  font-size: var(--fs-note);
  line-height: 1.8;
}

/* ---------- 四步流程 ---------- */
.page-contact .flow {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0 0 0 1.6rem;
  position: relative;
  display: grid;
  gap: 1.6rem;
}

.page-contact .flow::before {
  content: "";
  position: absolute;
  left: 6px;
  top: .55rem;
  bottom: .55rem;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, var(--flag-blue), var(--flag-green) 45%, var(--flag-yellow) 74%, var(--flag-red));
  opacity: .55;
}

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

.page-contact .flow__step::before {
  content: "";
  position: absolute;
  left: -1.6rem;
  top: .34rem;
  width: 10px;
  height: 10px;
  box-sizing: content-box;
  border: 2px solid var(--sky);
  border-radius: 50%;
  background: var(--paper);
}

.page-contact .flow__num {
  display: block;
  font-size: var(--fs-note);
  font-weight: 700;
  letter-spacing: .2em;
  color: var(--sky);
}

.page-contact .flow__step h3 {
  margin: .2rem 0 .4rem;
  font-size: 1.12rem;
}

.page-contact .flow__step p {
  margin: 0;
  color: var(--contact-soft);
  font-size: .98rem;
  line-height: 1.8;
}

/* ---------- 提交前准备 ---------- */
.page-contact .prep {
  margin-top: clamp(2.25rem, 5vw, 3.25rem);
  padding-top: clamp(1.5rem, 3vw, 2rem);
  border-top: 1px solid var(--line);
}

.page-contact .prep h3 {
  margin: 0 0 1.2rem;
  font-size: 1.12rem;
}

.page-contact .prep-list {
  margin: 0;
  display: grid;
  gap: 1.05rem;
}

.page-contact .prep-list__row {
  display: grid;
  gap: .3rem;
}

.page-contact .prep-list__key {
  font-weight: 700;
  font-size: .95rem;
  color: var(--ink);
}

.page-contact .prep-list__val {
  margin: 0;
  color: var(--contact-soft);
  font-size: .95rem;
  line-height: 1.8;
}

@media (min-width: 620px) {
  .page-contact .prep-list__row {
    grid-template-columns: 9.5rem minmax(0, 1fr);
    gap: 1.25rem;
    align-items: baseline;
  }
}

/* ---------- 中段横向场景图 ---------- */
.page-contact .media-frame {
  margin: 0;
}

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

/* ---------- 客服与反馈 ---------- */
.page-contact .support {
  display: grid;
  gap: clamp(2.25rem, 5vw, 3.5rem);
  align-items: start;
}

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

.page-contact .check-list {
  list-style: none;
  margin: 1.7rem 0 0;
  padding: 0;
  display: grid;
  gap: 1.05rem;
}

.page-contact .check-list li {
  display: grid;
  grid-template-columns: 12px minmax(0, 1fr);
  gap: .9rem;
  align-items: start;
  line-height: 1.8;
}

.page-contact .check-list .dot {
  margin-top: .64rem;
}

.page-contact .support__note {
  margin: 2rem 0 0;
  padding-top: 1.3rem;
  border-top: 1px solid var(--line);
  color: var(--contact-soft);
  font-size: var(--fs-note);
  line-height: 1.9;
}

.page-contact .support__note a {
  color: var(--sky);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .support__note a:hover {
  color: var(--indigo);
}

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

/* ---------- 常见问题 ---------- */
.page-contact .faq-grid {
  display: grid;
  margin-top: 1.5rem;
  border-top: 1px solid var(--line);
}

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

.page-contact .faq-item summary {
  position: relative;
  list-style: none;
  cursor: pointer;
  padding: 1.05rem 2.2rem 1.05rem 0;
  font-size: 1.02rem;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.6;
}

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

.page-contact .faq-item summary::after {
  content: "+";
  position: absolute;
  right: .3rem;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.3rem;
  font-weight: 400;
  line-height: 1;
  color: var(--sky);
}

.page-contact .faq-item[open] summary::after {
  content: "–";
}

.page-contact .faq-item summary:hover {
  color: var(--sky);
}

.page-contact .faq-item summary:focus-visible {
  outline: 2px solid var(--sky);
  outline-offset: 3px;
}

.page-contact .faq-item p {
  margin: 0 0 1.2rem;
  max-width: 54ch;
  color: var(--contact-soft);
  font-size: .97rem;
  line-height: 1.85;
}

@media (min-width: 820px) {
  .page-contact .faq-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: clamp(2rem, 5vw, 4rem);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-card,
  .page-contact .tab {
    transition: none;
  }

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