.page-contact {
  --pc-pad: 56px;
  position: relative;
  background-color: var(--ink);
  background-image:
    linear-gradient(rgba(30, 68, 54, 0.14) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 68, 54, 0.14) 1px, transparent 1px);
  background-size: 56px 56px, 56px 56px;
  color: var(--bone);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

.page-contact .shell {
  width: 100%;
  max-width: var(--shell-max);
  margin-inline: auto;
  padding-inline: 16px;
  box-sizing: border-box;
}

/* ---------- 首屏 ---------- */

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

.page-contact .contact-hero__media {
  display: block;
  line-height: 0;
  background: var(--board);
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  max-width: 100%;
  object-fit: cover;
  object-position: center 45%;
}

.page-contact .contact-hero__body {
  padding: 28px 0 34px;
  background: linear-gradient(180deg, rgba(11, 36, 28, 0.96) 0%, var(--ink) 100%);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero__context {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-contact .contact-hero__context span {
  color: var(--line);
  padding-inline: 6px;
}

.page-contact .contact-hero__title {
  position: relative;
  margin: 0 0 16px;
  padding-left: 16px;
  font-family: var(--font-sans);
  font-weight: 900;
  font-size: 30px;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--bone);
}

.page-contact .contact-hero__title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.12em;
  bottom: 0.12em;
  width: 4px;
  background: var(--whistle);
}

.page-contact .contact-hero__lede {
  margin: 0 0 20px;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.68;
  color: var(--mist);
}

.page-contact .contact-hero__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

/* ---------- 章节头 ---------- */

.page-contact .sec-head {
  padding: 38px 0 22px;
  border-top: 1px solid var(--line);
  margin-bottom: 22px;
}

.page-contact .sec-head__idx {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--whistle);
}

.page-contact .sec-head__title {
  margin: 0;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.28;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-contact .sec-head__text {
  margin: 10px 0 0;
  max-width: 46em;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* ---------- 01 通道 ---------- */

.page-contact .contact-channels {
  padding-bottom: var(--pc-pad);
}

.page-contact .channel-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .channel-card {
  position: relative;
  padding: 20px 18px 22px;
  background: var(--board);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
  transition: border-color 0.18s var(--ease), transform 0.18s var(--ease);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-within {
  border-color: var(--whistle);
  transform: translate(-2px, -2px);
}

.page-contact .channel-card__no {
  position: absolute;
  top: 14px;
  right: 16px;
  font-family: var(--font-mono);
  font-size: 28px;
  line-height: 1;
  color: rgba(159, 176, 168, 0.26);
  pointer-events: none;
}

.page-contact .channel-card__kicker {
  margin: 0 0 14px;
  line-height: 1;
}

.page-contact .channel-card__name {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-contact .channel-card__value {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  letter-spacing: 0.01em;
  color: var(--whistle);
  word-break: break-all;
}

.page-contact .channel-card__desc {
  margin: 0 0 16px;
  font-size: 14px;
  line-height: 1.68;
  color: var(--mist);
}

.page-contact .channel-card__list {
  margin: 0;
  padding: 14px 0 0;
  list-style: none;
  border-top: 1px dashed var(--line);
}

.page-contact .channel-card__list li {
  position: relative;
  padding-left: 15px;
  font-size: 13px;
  line-height: 1.85;
  color: var(--bone);
}

.page-contact .channel-card__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 6px;
  height: 1px;
  background: var(--whistle);
}

/* ---------- 02 响应时段 ---------- */

.page-contact .contact-sla {
  padding-bottom: var(--pc-pad);
}

.page-contact .sla-board {
  padding: 22px 18px;
  background: var(--board);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
}

.page-contact .sla-scale {
  display: flex;
  align-items: center;
  gap: 12px;
}

.page-contact .sla-scale__tick {
  flex: none;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.02em;
  color: var(--bone);
}

.page-contact .sla-scale__bar {
  position: relative;
  flex: 1 1 auto;
  min-width: 0;
  height: 6px;
  background: rgba(30, 68, 54, 0.65);
  border: 1px solid var(--line);
}

.page-contact .sla-scale__fill {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, var(--whistle) 0%, var(--warm) 100%);
}

.page-contact .sla-scale__bar::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -4px;
  width: 11px;
  height: 11px;
  margin-top: -5.5px;
  border-radius: 50%;
  background: var(--whistle);
  animation: pc-whistle 1.6s ease-in-out infinite;
}

@keyframes pc-whistle {
  0% { box-shadow: 0 0 0 0 rgba(245, 197, 24, 0.5); }
  70% { box-shadow: 0 0 0 10px rgba(245, 197, 24, 0); }
  100% { box-shadow: 0 0 0 0 rgba(245, 197, 24, 0); }
}

.page-contact .sla-scale__note {
  margin: 14px 0 0;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .sla-priority {
  margin-top: 22px;
  padding: 16px 18px;
  background: var(--layer);
  border-left: 3px solid var(--whistle);
}

.page-contact .sla-priority__head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 800;
  color: var(--bone);
}

.page-contact .sla-priority__text {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .sla-board__foot {
  margin: 22px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .sla-board__foot a,
.page-contact .coop-card__meta a {
  color: var(--whistle);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 197, 24, 0.45);
  padding-bottom: 1px;
}

.page-contact .sla-board__foot a:hover,
.page-contact .coop-card__meta a:hover {
  color: var(--warm);
  border-bottom-color: var(--warm);
}

/* ---------- 03 反馈要点 ---------- */

.page-contact .contact-brief {
  padding-bottom: var(--pc-pad);
}

.page-contact .brief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.page-contact .brief-figure {
  margin: 0;
  border: 1px solid var(--line);
  background: var(--board);
  box-shadow: var(--shadow-paper);
}

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

.page-contact .brief-figure__cap {
  padding: 12px 14px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--mist);
  border-top: 1px solid var(--line);
}

.page-contact .fb-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 10px;
}

.page-contact .fb-item__label {
  display: grid;
  grid-template-columns: 20px 1fr;
  gap: 12px;
  align-items: start;
  padding: 13px 14px;
  background: var(--layer);
  border: 1px solid var(--line);
  cursor: pointer;
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .fb-item__label:hover {
  border-color: rgba(245, 197, 24, 0.4);
}

.page-contact .fb-item__box {
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  width: 16px;
  height: 16px;
  margin: 3px 0 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  flex: none;
}

.page-contact .fb-item__box:checked {
  background: var(--whistle);
  border-color: var(--whistle);
}

.page-contact .fb-item__box:checked::after {
  content: "";
  position: absolute;
  left: 4px;
  top: 0;
  width: 5px;
  height: 9px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  transform: rotate(42deg);
}

.page-contact .fb-item__box:focus-visible {
  outline: 2px solid var(--warm);
  outline-offset: 2px;
}

.page-contact .fb-item__text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--bone);
  transition: color 0.18s var(--ease);
}

.page-contact .fb-item__text strong {
  font-weight: 800;
  color: var(--whistle);
}

.page-contact .fb-item__box:checked ~ .fb-item__text {
  color: var(--mist);
}

.page-contact .fb-item__box:checked ~ .fb-item__text strong {
  color: var(--mist);
}

.page-contact .brief-side__note {
  margin: 14px 0 0;
  font-family: var(--font-mono);
  font-size: 11px;
  line-height: 1.8;
  letter-spacing: 0.04em;
  color: var(--mist);
}

/* ---------- 04 合作 ---------- */

.page-contact .contact-coop {
  padding-bottom: var(--pc-pad);
}

.page-contact .coop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .coop-card {
  padding: 20px 18px 22px;
  background: var(--board);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-paper);
}

.page-contact .coop-card__kicker {
  margin: 0 0 14px;
  line-height: 1;
}

.page-contact .coop-card__name {
  margin: 0 0 12px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: -0.01em;
  color: var(--bone);
}

.page-contact .coop-card__desc {
  margin: 0 0 14px;
  font-size: 14px;
  line-height: 1.72;
  color: var(--mist);
}

.page-contact .coop-card__meta {
  margin: 0;
  padding-top: 14px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .coop-foot {
  margin: 20px 0 0;
  padding: 14px 16px;
  background: var(--layer);
  border-left: 3px solid var(--verify);
  font-size: 13px;
  line-height: 1.7;
  color: var(--bone);
}

/* ---------- 05 信息条 ---------- */

.page-contact .contact-meta {
  padding-bottom: 64px;
}

.page-contact .meta-strip {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  margin: 0;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .meta-strip__cell {
  min-width: 0;
  padding: 15px 16px;
  background: var(--ink);
}

.page-contact .meta-strip__cell dt {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--mist);
}

.page-contact .meta-strip__cell dd {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.55;
  letter-spacing: 0.01em;
  color: var(--bone);
  word-break: break-word;
}

.page-contact .meta-next {
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.page-contact .meta-next__lead {
  margin: 0 0 12px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--whistle);
}

.page-contact .meta-next__list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.page-contact .meta-next__list a {
  display: inline-block;
  padding: 2px 0;
  font-size: 14px;
  color: var(--bone);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 0.16s var(--ease), border-color 0.16s var(--ease);
}

.page-contact .meta-next__list a:hover,
.page-contact .meta-next__list a:focus-visible {
  color: var(--whistle);
  border-bottom-color: var(--whistle);
}

/* ---------- 响应式 ---------- */

@media (min-width: 640px) {
  .page-contact .shell {
    padding-inline: 32px;
  }

  .page-contact .contact-hero__body {
    padding: 36px 0 44px;
  }

  .page-contact .contact-hero__title {
    font-size: 40px;
  }

  .page-contact .sec-head__idx {
    display: inline-block;
    margin-right: 14px;
    vertical-align: baseline;
  }

  .page-contact .sec-head__title {
    display: inline;
    font-size: 24px;
  }

  .page-contact .sec-head__text {
    margin-top: 12px;
  }

  .page-contact .channel-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .coop-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .meta-strip {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .brief-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
    gap: 24px;
  }
}

@media (min-width: 1024px) {
  .page-contact .shell {
    padding-inline: 48px;
  }

  .page-contact .contact-hero__body {
    padding: 46px 0 54px;
  }

  .page-contact .contact-hero__title {
    font-size: 54px;
    padding-left: 22px;
    max-width: 18em;
  }

  .page-contact .contact-hero__title::before {
    width: 6px;
  }

  .page-contact .contact-hero__lede {
    font-size: 16px;
    padding-left: 22px;
    max-width: 52em;
  }

  .page-contact .sec-head {
    padding-top: 52px;
    margin-bottom: 26px;
  }

  .page-contact .sec-head__title {
    font-size: 28px;
  }

  .page-contact .channel-list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .page-contact .channel-card {
    padding: 24px 22px 26px;
    display: flex;
    flex-direction: column;
  }

  .page-contact .channel-card__list {
    margin-top: auto;
  }

  .page-contact .sla-board {
    padding: 30px 34px;
  }

  .page-contact .sla-priority {
    padding: 20px 24px;
    display: grid;
    grid-template-columns: minmax(0, 0.8fr) minmax(0, 2fr);
    gap: 24px;
    align-items: start;
  }

  .page-contact .sla-priority__head {
    margin: 0;
  }

  .page-contact .brief-grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 32px;
  }

  .page-contact .brief-side {
    padding-top: 4px;
  }

  .page-contact .coop-grid {
    gap: 20px;
  }

  .page-contact .coop-card {
    padding: 26px 24px 28px;
  }

  .page-contact .meta-strip {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .meta-strip__cell {
    padding: 20px 22px;
  }

  .page-contact .contact-meta {
    padding-bottom: 88px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .sla-scale__bar::after {
    animation: none;
  }

  .page-contact .channel-card,
  .page-contact .fb-item__label,
  .page-contact .meta-next__list a {
    transition: none;
  }
}