.page-contact {
  --pc-line: var(--line-500);
  position: relative;
  background:
    radial-gradient(680px 380px at 84% 2%, rgba(51, 242, 208, .09), transparent 62%),
    radial-gradient(520px 420px at 6% 88%, rgba(255, 138, 60, .06), transparent 66%),
    linear-gradient(180deg, var(--ink-900) 0%, #061127 58%, var(--ink-900) 100%);
  color: var(--text-bright);
  padding: clamp(18px, 3vw, 30px) 0 clamp(56px, 8vw, 110px);
  overflow: hidden;
}

.page-contact figure {
  margin: 0;
}

.page-contact .contact-split {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(30px, 6vw, 52px);
  margin-top: clamp(18px, 3vw, 30px);
}

.page-contact .contact-main,
.page-contact .contact-side {
  min-width: 0;
}

/* ---------- 左栏 · 标题 ---------- */
.page-contact h1 {
  margin: 10px 0 0;
  max-width: 16ch;
  font-size: clamp(30px, 8.2vw, 54px);
  line-height: 1.14;
  font-weight: 900;
  letter-spacing: .02em;
  color: var(--text-bright);
}

.page-contact .contact-head .lede {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 48ch;
  font-size: clamp(15px, 1.6vw, 17.5px);
  line-height: 1.85;
  color: var(--text-muted);
}

/* ---------- 左栏 · 渠道 ---------- */
.page-contact .contact-channels {
  margin-top: clamp(30px, 5vw, 46px);
}

.page-contact .contact-h2 {
  margin: 0;
  font-size: clamp(20px, 3.6vw, 27px);
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--text-bright);
}

.page-contact .contact-sub {
  margin: 8px 0 0;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-contact .contact-routes {
  margin-top: clamp(18px, 3vw, 26px);
  border: 1px solid var(--pc-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
}

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

.page-contact .channel-list {
  display: grid;
  gap: clamp(14px, 2vw, 18px);
  margin-top: clamp(20px, 3vw, 28px);
}

.page-contact .channel-card {
  position: relative;
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--pc-line);
  border-radius: var(--radius);
  background: var(--glass);
  backdrop-filter: blur(10px);
  transition: border-color .24s var(--ease), background-color .24s var(--ease);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--cyan-30);
  background: rgba(18, 48, 107, .5);
}

.page-contact .channel-card__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 12px;
}

.page-contact .channel-idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 28px;
  height: 28px;
  border: 1px solid var(--cyan-30);
  border-radius: 4px;
  background: var(--cyan-08);
  color: var(--cyan);
  font-size: 12px;
  letter-spacing: .04em;
}

.page-contact .channel-card h3 {
  flex: 1 1 auto;
  margin: 0;
  font-size: clamp(17px, 2.2vw, 19px);
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--text-bright);
}

.page-contact .channel-when {
  margin: 12px 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-bright);
}

.page-contact .channel-points {
  list-style: none;
  margin: 14px 0 0;
  padding: 0;
  display: grid;
  gap: 8px;
}

.page-contact .channel-points li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
  opacity: .62;
  transition: opacity .26s var(--ease), color .26s var(--ease);
}

.page-contact .channel-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 8px;
  height: 1px;
  background: var(--cyan);
}

.page-contact .channel-card:hover .channel-points li,
.page-contact .channel-card:focus-within .channel-points li {
  opacity: 1;
  color: var(--text-bright);
}

.page-contact .channel-card:hover .channel-points li:nth-child(1),
.page-contact .channel-card:focus-within .channel-points li:nth-child(1) {
  transition-delay: 0s;
}

.page-contact .channel-card:hover .channel-points li:nth-child(2),
.page-contact .channel-card:focus-within .channel-points li:nth-child(2) {
  transition-delay: .07s;
}

.page-contact .channel-card:hover .channel-points li:nth-child(3),
.page-contact .channel-card:focus-within .channel-points li:nth-child(3) {
  transition-delay: .14s;
}

.page-contact .channel-mail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px dashed var(--pc-line);
}

.page-contact .channel-mail .contact-value {
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: .01em;
  color: var(--cyan);
  word-break: break-all;
}

.page-contact .channel-tel {
  display: block;
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px dashed var(--pc-line);
  font-family: var(--font-mono);
  font-size: clamp(21px, 4.4vw, 27px);
  font-weight: 700;
  letter-spacing: .05em;
  color: var(--cyan);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-contact .channel-tel:hover,
.page-contact .channel-tel:focus-visible {
  color: var(--orange);
}

.page-contact .channel-addr {
  display: block;
  margin-top: 16px;
  padding-top: 15px;
  border-top: 1px dashed var(--pc-line);
  font-style: normal;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-bright);
}

/* ---------- 左栏 · 合作折叠 ---------- */
.page-contact .coop {
  margin-top: clamp(22px, 3.4vw, 32px);
  border: 1px solid var(--pc-line);
  border-radius: var(--radius);
  background: rgba(7, 20, 51, .55);
  overflow: hidden;
}

.page-contact .coop summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 17px clamp(18px, 2.4vw, 24px);
  cursor: pointer;
  list-style: none;
  transition: background-color .2s var(--ease);
}

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

.page-contact .coop summary::after {
  content: "+";
  flex: none;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--cyan);
}

.page-contact .coop[open] summary::after {
  content: "−";
}

.page-contact .coop summary:hover {
  background: var(--cyan-08);
}

.page-contact .coop-title {
  font-size: 16px;
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--text-bright);
}

.page-contact .coop-cue {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .12em;
  color: var(--text-muted);
}

.page-contact .coop summary::after {
  margin-left: 8px;
}

.page-contact .coop-body {
  padding: 4px clamp(18px, 2.4vw, 24px) 24px;
  display: grid;
  gap: 16px;
}

.page-contact .coop-intro {
  margin: 0;
  padding-top: 14px;
  border-top: 1px solid var(--pc-line);
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-contact .coop-item h3 {
  margin: 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--cyan);
}

.page-contact .coop-item p {
  margin: 6px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-bright);
}

/* ---------- 右栏 ---------- */
.page-contact .contact-side {
  display: grid;
  align-content: start;
  gap: clamp(20px, 3vw, 28px);
}

.page-contact .side-panel {
  padding: clamp(20px, 2.8vw, 28px);
  border-radius: var(--radius);
}

.page-contact .side-h2 {
  margin: 0;
  font-size: clamp(18px, 2.4vw, 21px);
  font-weight: 800;
  letter-spacing: .02em;
  color: var(--text-bright);
}

.page-contact .side-sub {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-muted);
}

.page-contact .need-list {
  list-style: none;
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: clamp(12px, 1.8vw, 16px);
}

.page-contact .need-list li {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.page-contact .need-idx {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: none;
  width: 30px;
  height: 30px;
  border: 1px solid var(--cyan-30);
  border-radius: 3px;
  background: var(--cyan-08);
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: .06em;
}

.page-contact .need-list h3 {
  margin: 4px 0 0;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: .01em;
  color: var(--text-bright);
}

.page-contact .need-list p {
  margin: 5px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-contact .reply-list {
  list-style: none;
  margin: clamp(16px, 2.4vw, 22px) 0 0;
  padding: 0;
  display: grid;
  gap: 14px;
}

.page-contact .reply-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 10px;
}

.page-contact .reply-list p {
  flex: 1 1 200px;
  margin: 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-contact .side-note {
  margin: 20px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--pc-line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--text-muted);
}

.page-contact .side-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-30);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

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

.page-contact .place-addr {
  margin: 14px 0 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--text-bright);
}

.page-contact .visit-hint {
  display: inline-block;
  margin-top: 12px;
  padding-bottom: 2px;
  font-size: 13.5px;
  letter-spacing: .02em;
  color: var(--amber);
  border-bottom: 1px dashed rgba(255, 200, 87, .45);
  cursor: help;
}

.page-contact .visit-tip {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-contact .place-map {
  margin-top: 18px;
  border: 1px solid var(--pc-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: linear-gradient(150deg, var(--ink-700), var(--ink-900));
}

.page-contact .place-note {
  margin: 16px 0 0;
  font-size: 13.5px;
  line-height: 1.72;
  color: var(--text-muted);
}

.page-contact .place-note a {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid var(--cyan-30);
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

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

/* ---------- 桌面分屏 ---------- */
@media (min-width: 960px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    gap: clamp(40px, 4.6vw, 76px);
    align-items: start;
  }

  .page-contact .contact-split::before {
    content: "";
    position: absolute;
    left: 57.4%;
    top: 34px;
    width: 1px;
    height: 300px;
    background: linear-gradient(180deg, transparent, var(--line-500) 14%, var(--cyan-30) 56%, transparent);
    transform: rotate(var(--slant));
    transform-origin: top center;
    pointer-events: none;
  }

  .page-contact h1 {
    font-size: clamp(38px, 4.4vw, 58px);
  }

  .page-contact .visit-tip {
    max-height: 0;
    margin-top: 0;
    opacity: 0;
    overflow: hidden;
    transition: max-height .28s var(--ease), opacity .28s var(--ease), margin-top .28s var(--ease);
  }

  .page-contact .visit-hint:hover + .visit-tip {
    max-height: 180px;
    margin-top: 10px;
    opacity: 1;
  }
}

@media (min-width: 1280px) {
  .page-contact .contact-side {
    padding-top: 30px;
  }

  .page-contact .contact-split::before {
    height: 340px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-points li,
  .page-contact .channel-card,
  .page-contact .visit-tip {
    transition: none;
  }

  .page-contact .channel-points li {
    opacity: 1;
    color: var(--text-bright);
  }
}