.page-contact {
  position: relative;
  color: var(--text);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  background: var(--panel-deep);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.page-contact .contact-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 20, 15, 0.5) 0%, rgba(6, 20, 15, 0.9) 60%, var(--ink) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  padding-top: 28px;
  padding-bottom: 36px;
}

.page-contact .contact-hero .breadcrumb {
  margin: 0 0 26px;
}

.page-contact .contact-hero__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(28px, 6vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--head);
  margin: 0 0 20px;
  max-width: 17ch;
}

.page-contact .contact-hero__lead {
  margin: 0;
  max-width: 58ch;
  font-size: 15.5px;
  line-height: 1.78;
}

.page-contact .contact-hero__meter {
  margin-top: 34px;
  height: 10px;
  border-top: 1px solid var(--line);
  background-image: repeating-linear-gradient(90deg, var(--line) 0 1px, transparent 1px 22px);
  background-size: 22px 7px;
  background-repeat: repeat-x;
  -webkit-mask-image: linear-gradient(90deg, #000 0%, transparent 92%);
  mask-image: linear-gradient(90deg, #000 0%, transparent 92%);
}

/* ---------- 通用区块 ---------- */
.page-contact .section-block {
  padding: 52px 0;
}

.page-contact .section-head {
  margin-bottom: 26px;
}

.page-contact .section-head h2 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 3.8vw, 34px);
  line-height: 1.16;
  letter-spacing: -0.02em;
  color: var(--head);
  margin: 0;
}

/* ---------- 通道卡 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .channel-card {
  position: relative;
  overflow: hidden;
  padding: 24px 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.25s ease;
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 100%;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s ease;
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--accent-soft);
}

.page-contact .channel-card:hover::before,
.page-contact .channel-card:focus-within::before {
  transform: scaleY(1);
}

.page-contact .channel-kicker {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--accent);
  margin: 0 0 14px;
}

.page-contact .channel-title {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--head);
  margin: 0 0 14px;
}

.page-contact .channel-value {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  font-size: clamp(17px, 4.6vw, 27px);
  line-height: 1.3;
  letter-spacing: -0.01em;
  color: var(--head);
  padding-bottom: 12px;
  margin: 0 0 16px;
  border-bottom: 1px solid var(--accent);
  word-break: break-all;
}

.page-contact .channel-desc {
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
  transition: color 0.25s ease;
}

.page-contact .channel-card:hover .channel-desc,
.page-contact .channel-card:focus-within .channel-desc {
  color: var(--text);
}

.page-contact .channel-meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--text-faint);
}

/* ---------- 信息条 ---------- */
.page-contact .info-strip {
  border-top: 1px solid var(--line);
}

.page-contact .info-strip__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line);
}

.page-contact .info-strip__k {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--text-faint);
}

.page-contact .info-strip__v {
  font-size: 16px;
  color: var(--head);
  line-height: 1.6;
}

.page-contact .info-strip__v.num {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.page-contact .icp-chip {
  display: inline-block;
  padding: 6px 12px;
  background: var(--glass);
  border: 1px solid var(--glass-line);
  border-radius: var(--radius);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
  color: var(--accent);
}

.page-contact .strip-note {
  margin: 22px 0 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

/* ---------- 反馈清单 ---------- */
.page-contact .feedback-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

.page-contact .feedback-lead {
  margin: 0 0 6px;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .check-item {
  position: relative;
  display: flex;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  line-height: 1.72;
  cursor: pointer;
}

.page-contact .check-item:first-of-type {
  border-top: 1px solid var(--line);
  margin-top: 14px;
}

.page-contact .check-item input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
}

.page-contact .check-box {
  position: relative;
  flex: 0 0 auto;
  width: 16px;
  height: 16px;
  margin-top: 5px;
  border: 1px solid var(--line);
  border-radius: 2px;
  transition: background-color 0.18s ease, border-color 0.18s ease;
}

.page-contact .check-item:hover .check-box {
  border-color: var(--accent-soft);
}

.page-contact .check-item input:checked + .check-box {
  background: var(--accent);
  border-color: var(--accent);
}

.page-contact .check-item input:checked + .check-box::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 1px;
  width: 5px;
  height: 9px;
  border: solid var(--ink);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

.page-contact .check-item input:focus-visible + .check-box {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page-contact .check-text b {
  color: var(--head);
  font-weight: 600;
}

.page-contact .feedback-figure {
  margin: 0;
}

.page-contact .feedback-figure img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.page-contact .feedback-figure .media-caption {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: 0.04em;
  line-height: 1.7;
  color: var(--text-faint);
}

/* ---------- 合作分段切换 ---------- */
.page-contact .collab {
  position: relative;
}

.page-contact .collab-input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  margin: 0;
}

.page-contact .collab-tablist {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.page-contact .collab-tab {
  display: inline-block;
  padding: 9px 18px;
  font-size: 14px;
  line-height: 1.2;
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
  user-select: none;
  transition: color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}

.page-contact .collab-tab:hover {
  color: var(--head);
  border-color: var(--accent-soft);
}

.page-contact #collab-content:checked ~ .collab-tablist label[for="collab-content"],
.page-contact #collab-data:checked ~ .collab-tablist label[for="collab-data"],
.page-contact #collab-media:checked ~ .collab-tablist label[for="collab-media"] {
  background: var(--accent);
  border-color: var(--accent);
  color: var(--ink);
  font-weight: 600;
}

.page-contact #collab-content:focus-visible ~ .collab-tablist label[for="collab-content"],
.page-contact #collab-data:focus-visible ~ .collab-tablist label[for="collab-data"],
.page-contact #collab-media:focus-visible ~ .collab-tablist label[for="collab-media"] {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.page-contact .collab-panels {
  margin-top: 22px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.page-contact .collab-panel {
  display: none;
}

.page-contact #collab-content:checked ~ .collab-panels #panel-collab-content,
.page-contact #collab-data:checked ~ .collab-panels #panel-collab-data,
.page-contact #collab-media:checked ~ .collab-panels #panel-collab-media {
  display: block;
}

.page-contact .collab-panel h3 {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.01em;
  color: var(--head);
  margin: 0 0 10px;
}

.page-contact .collab-panel p {
  margin: 0;
  max-width: 64ch;
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .collab-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 9px;
}

.page-contact .collab-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--text);
}

.page-contact .collab-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 9px;
  height: 1px;
  background: var(--accent);
}

/* ---------- 继续查看 ---------- */
.page-contact .contact-next {
  border-top: 1px solid var(--line);
  padding: 44px 0 60px;
}

.page-contact .contact-next__label {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  margin: 0 0 14px;
}

.page-contact .contact-next__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
}

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

.page-contact .contact-next__list a {
  display: block;
  padding: 15px 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--head);
  text-decoration: none;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.page-contact .contact-next__list a:hover,
.page-contact .contact-next__list a:focus-visible {
  color: var(--accent);
  padding-left: 6px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .info-strip__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 24px;
    align-items: baseline;
  }

  .page-contact .collab-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 9px 28px;
  }
}

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

  .page-contact .channel-card {
    padding: 28px 26px 26px;
  }

  .page-contact .contact-next__list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    column-gap: 40px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    padding-top: 44px;
    padding-bottom: 52px;
  }

  .page-contact .section-block {
    padding: 76px 0;
  }

  .page-contact .feedback-grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    gap: 48px;
    align-items: start;
  }

  .page-contact .contact-next {
    padding: 52px 0 72px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .channel-card::before,
  .page-contact .channel-desc,
  .page-contact .collab-tab,
  .page-contact .contact-next__list a,
  .page-contact .check-box {
    transition: none;
  }

  .page-contact .contact-next__list a:hover,
  .page-contact .contact-next__list a:focus-visible {
    padding-left: 0;
  }
}