.page-contact {
  --pc-gap: clamp(14px, 2.2vw, 26px);
  --pc-pad: clamp(20px, 4vw, 48px);
  display: block;
}

.page-contact .c-inner {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--c-cyan);
  outline-offset: 2px;
}

/* ---------- 首屏 ---------- */
.page-contact .hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(20px, 4vw, 44px) clamp(32px, 6vw, 72px);
  background:
    radial-gradient(120% 90% at 88% -12%, rgba(49, 225, 196, 0.13), transparent 62%),
    linear-gradient(180deg, var(--c-ink), var(--c-ink));
  border-bottom: 1px solid var(--c-line);
}

.page-contact .hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(28, 85, 72, 0.34) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 85, 72, 0.34) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 76%);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.75), transparent 76%);
  pointer-events: none;
}

.page-contact .hero .c-inner {
  position: relative;
  z-index: 1;
}

.page-contact .hero-frame {
  position: relative;
  margin-top: 16px;
  padding: var(--pc-pad);
  border: 1px solid var(--c-line);
  background: linear-gradient(158deg, rgba(15, 58, 47, 0.82), rgba(8, 33, 27, 0.92));
}

.page-contact .hero-frame::before,
.page-contact .hero-frame::after {
  content: "";
  position: absolute;
  width: 16px;
  height: 16px;
  border: 2px solid var(--c-cyan);
}

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

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

.page-contact .hero-frame h1 {
  margin: 12px 0 0;
  color: var(--c-paper);
}

.page-contact .hero-frame .lede {
  margin-top: 18px;
  max-width: var(--measure);
  color: var(--c-mist);
}

.page-contact .hero-channels {
  list-style: none;
  margin: clamp(22px, 3vw, 34px) 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
}

.page-contact .hero-channels li {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 14px 16px;
  background: rgba(5, 16, 13, 0.68);
}

.page-contact .ch-label {
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-mist);
}

.page-contact .ch-val {
  font-family: var(--f-mono);
  font-size: clamp(15px, 2.1vw, 19px);
  letter-spacing: 0.01em;
  color: var(--c-cyan);
  word-break: break-all;
}

.page-contact .hero-channels li:nth-child(2) .ch-val {
  color: var(--c-orange);
}

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

.page-contact .hero-media {
  margin: clamp(20px, 3vw, 34px) 0 0;
  border: 1px solid var(--c-line);
}

.page-contact .hero-media img {
  aspect-ratio: 16 / 9;
  filter: saturate(1.05) contrast(1.05);
}

/* ---------- 章节骨架 ---------- */
.page-contact .section {
  padding-block: clamp(40px, 7vw, 88px);
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .section-head {
  margin-bottom: clamp(24px, 3.4vw, 40px);
}

.page-contact .section-head h2 {
  margin: 10px 0 0;
  color: var(--c-paper);
  max-width: 24em;
}

.page-contact .channels {
  background: var(--c-ink);
}

.page-contact .submit {
  background: linear-gradient(180deg, var(--c-board), var(--c-ink) 78%);
}

.page-contact .place {
  background: var(--c-ink);
}

.page-contact .faq {
  background: var(--c-deep);
}

.page-contact .next {
  background: var(--c-board);
  border-bottom: 0;
}

/* ---------- 通道卡片 ---------- */
.page-contact .chan-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .chan-card {
  padding: clamp(18px, 2.4vw, 28px);
  border-top: 2px solid var(--c-cyan);
  background: var(--c-board);
}

.page-contact .chan-card h3 {
  margin: 12px 0 0;
  font-size: clamp(19px, 2.4vw, 23px);
  color: var(--c-paper);
}

.page-contact .chan-card p {
  color: var(--c-mist);
  font-size: 15px;
  line-height: 1.75;
}

.page-contact .chan-value {
  margin: 10px 0 12px;
  font-family: var(--f-mono);
  font-size: clamp(15px, 2vw, 18px);
  letter-spacing: 0.01em;
  color: var(--c-cyan);
  word-break: break-all;
}

.page-contact .chan-value--orange {
  color: var(--c-orange);
}

/* ---------- 提交区 ---------- */
.page-contact .submit-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 4vw, 52px);
}

.page-contact .submit-aside h2 {
  margin: 10px 0 0;
  color: var(--c-paper);
  max-width: 14em;
}

.page-contact .aside-card {
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: clamp(18px, 2.4vw, 24px);
  border-left: 3px solid var(--c-cyan);
  background: rgba(5, 16, 13, 0.6);
}

.page-contact .aside-card h3 {
  margin: 0;
  font-size: 18px;
  color: var(--c-paper);
}

.page-contact .plain-list {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .plain-list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--c-mist);
}

.page-contact .plain-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 9px;
  height: 2px;
  background: var(--c-cyan);
}

.page-contact .note {
  margin: 18px 0 0;
  font-family: var(--f-mono);
  font-size: 12px;
  line-height: 1.9;
  letter-spacing: 0.06em;
  color: var(--c-dim);
}

.page-contact .submit-main .tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin: 0 0 20px;
  padding: 0;
  border-bottom: 1px solid var(--c-line);
}

.page-contact .submit-main .tab {
  appearance: none;
  -webkit-appearance: none;
  min-height: 44px;
  padding: 11px 18px;
  border: 1px solid transparent;
  border-bottom: 0;
  background: transparent;
  color: var(--c-mist);
  font-family: var(--f-body);
  font-size: 15px;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .submit-main .tab[aria-selected="true"] {
  background: var(--c-cyan);
  border-color: var(--c-cyan);
  color: var(--c-ink);
  font-weight: 700;
}

.page-contact .submit-main .tab:hover {
  color: var(--c-paper);
}

.page-contact .submit-main .tab[aria-selected="true"]:hover {
  color: var(--c-ink);
}

.page-contact .submit-main .tab-panel {
  padding-left: clamp(16px, 2vw, 26px);
  border-left: 2px solid var(--c-grid);
  margin-bottom: 30px;
}

.page-contact .submit-main .tab-panel:last-child {
  margin-bottom: 0;
}

.page-contact .submit-main .tab-panel h3 {
  margin: 0;
  font-size: clamp(18px, 2.2vw, 21px);
  color: var(--c-paper);
}

.page-contact .checklist {
  list-style: none;
  counter-reset: ck;
  margin: 16px 0 0;
  padding: 0;
  border-top: 1px solid var(--c-line);
}

.page-contact .checklist li {
  counter-increment: ck;
  display: grid;
  grid-template-columns: 32px 1fr;
  gap: 12px;
  padding: 13px 0;
  border-bottom: 1px solid var(--c-line-soft);
  font-size: 15px;
  line-height: 1.72;
  color: var(--c-mist);
}

.page-contact .checklist li::before {
  content: counter(ck, decimal-leading-zero);
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--c-orange);
  padding-top: 4px;
}

.page-contact .panel-foot {
  margin: 16px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--c-dim);
  max-width: var(--measure);
}

/* ---------- 地址 ---------- */
.page-contact .place-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 52px);
}

.page-contact .place-text h2 {
  margin: 10px 0 0;
  color: var(--c-paper);
}

.page-contact .place-text > p {
  margin-top: 16px;
  max-width: var(--measure);
  color: var(--c-mist);
}

.page-contact .addr {
  margin: 22px 0;
  padding: 16px 20px;
  border-left: 3px solid var(--c-orange);
  background: rgba(15, 58, 47, 0.7);
  font-style: normal;
  font-family: var(--f-mono);
  font-size: clamp(15px, 2vw, 20px);
  letter-spacing: 0.02em;
  color: var(--c-paper);
}

.page-contact .facts {
  margin: 0;
  display: grid;
  gap: 10px;
}

.page-contact .facts > div {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
  align-items: baseline;
  padding-bottom: 9px;
  border-bottom: 1px solid var(--c-line-soft);
}

.page-contact .facts dt {
  min-width: 6em;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--c-mist);
}

.page-contact .facts dd {
  margin: 0;
  font-family: var(--f-mono);
  font-size: 15px;
  color: var(--c-cyan);
  word-break: break-all;
}

.page-contact .place-media {
  margin: 0;
  border: 1px solid var(--c-line);
}

.page-contact .place-media img {
  aspect-ratio: 4 / 3;
}

/* ---------- 问答 ---------- */
.page-contact .qa-list {
  display: grid;
  gap: 1px;
  background: var(--c-line-soft);
  border-top: 1px solid var(--c-line);
  border-bottom: 1px solid var(--c-line);
}

.page-contact .qa {
  background: var(--c-deep);
}

.page-contact .qa summary {
  position: relative;
  padding: 17px 48px 17px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-paper);
}

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

.page-contact .qa summary::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--f-mono);
  font-size: 20px;
  line-height: 1;
  color: var(--c-cyan);
}

.page-contact .qa[open] summary::after {
  content: "–";
  color: var(--c-orange);
}

.page-contact .qa p {
  margin: 0;
  padding: 0 18px 20px;
  max-width: var(--measure);
  font-size: 15px;
  line-height: 1.8;
  color: var(--c-mist);
}

/* ---------- 入口索引 ---------- */
.page-contact .link-grid {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--c-line-soft);
  border: 1px solid var(--c-line-soft);
}

.page-contact .link-grid a {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2px 16px;
  padding: 18px;
  background: var(--c-ink);
  color: var(--c-paper);
  text-decoration: none;
  transition: background var(--dur) var(--ease);
}

.page-contact .link-grid a:hover {
  background: rgba(28, 85, 72, 0.55);
}

.page-contact .lk-idx {
  grid-row: span 2;
  padding-top: 4px;
  font-family: var(--f-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--c-cyan);
}

.page-contact .lk-name {
  font-size: 17px;
  font-weight: 600;
}

.page-contact .lk-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--c-mist);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .hero-channels {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .chan-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-contact .link-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 900px) {
  .page-contact .place-grid {
    grid-template-columns: 1.15fr 0.85fr;
    align-items: center;
  }
}

@media (min-width: 960px) {
  .page-contact .chan-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .page-contact .submit-grid {
    grid-template-columns: 340px 1fr;
    align-items: start;
  }

  .page-contact .place-media img {
    aspect-ratio: 3 / 4;
  }
}

@media (min-width: 1080px) {
  .page-contact .link-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}