.page-contact {
  --contact-radius: 20px;
  --contact-gap: clamp(18px, 3vw, 32px);
  --contact-grid: rgba(47, 243, 214, .06);
  --contact-tint: rgba(11, 46, 40, .62);
  position: relative;
  padding-bottom: clamp(48px, 8vw, 96px);
  background-image:
    linear-gradient(var(--contact-grid) 1px, transparent 1px),
    linear-gradient(90deg, var(--contact-grid) 1px, transparent 1px);
  background-size: 76px 76px;
  background-position: center top;
}

.page-contact .breadcrumb {
  padding-top: clamp(14px, 2.4vw, 24px);
}

/* 首屏 */
.page-contact .contact-hero {
  position: relative;
  padding: clamp(20px, 3.6vw, 40px) 0 clamp(26px, 4vw, 48px);
}

.page-contact .contact-hero__eyebrow {
  margin: 0;
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .contact-hero__title {
  margin: 16px 0 0;
  max-width: 20ch;
  font-family: var(--font-head);
  font-weight: 900;
  font-size: clamp(30px, 5.4vw, 56px);
  line-height: 1.14;
  letter-spacing: -.01em;
  color: var(--paper);
}

.page-contact .contact-hero__lede {
  margin: 20px 0 0;
  max-width: 44ch;
  font-family: var(--font-body);
  font-size: clamp(16px, 1.7vw, 18px);
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .contact-jump {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 26px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-jump a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--glass);
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--paper);
  text-decoration: none;
  transition: border-color .2s var(--ease), color .2s var(--ease);
}

.page-contact .contact-jump a:hover,
.page-contact .contact-jump a:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan);
}

/* 章节通用间距 */
.page-contact .section {
  margin-top: clamp(44px, 6vw, 84px);
}

.page-contact .section__note {
  max-width: 52ch;
}

/* 01 三条通道 */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .channel-card {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--contact-radius);
  background: linear-gradient(158deg, var(--ink-800), var(--ink-900) 78%);
  transition: transform .3s var(--ease), border-color .3s var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--card-accent, var(--cyan)), rgba(47, 243, 214, 0));
}

.page-contact .channel-card:hover {
  transform: translateY(-3px);
  border-color: var(--card-accent, var(--cyan));
}

.page-contact .channel-card--mail { --card-accent: var(--cyan); }
.page-contact .channel-card--phone { --card-accent: var(--orange); }
.page-contact .channel-card--address { --card-accent: var(--cyan-deep); }

.page-contact .channel-card__cap {
  margin: 0;
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .14em;
  color: var(--card-accent, var(--cyan));
}

.page-contact .channel-card__value {
  margin: 14px 0 0;
  font-family: var(--font-meta);
  font-size: 16px;
  line-height: 1.6;
  color: var(--paper);
  word-break: break-word;
}

.page-contact .channel-card__value--display {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(30px, 4.8vw, 46px);
  line-height: 1.05;
  letter-spacing: .02em;
  color: var(--orange);
}

.page-contact .channel-card__value--address {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: clamp(17px, 1.9vw, 20px);
  line-height: 1.6;
}

.page-contact .channel-card__note {
  margin: 14px 0 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .channel-card__meta {
  margin: 18px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .06em;
  color: var(--cyan-deep);
}

/* 02 回复节奏 */
.page-contact .respond {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .respond__stats {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin-top: 24px;
}

.page-contact .respond-stat {
  padding: 6px 0 6px 18px;
  border-left: 2px solid var(--cyan);
}

.page-contact .respond-stat--warm {
  border-left-color: var(--orange);
}

.page-contact .respond-stat__value {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(26px, 3.6vw, 40px);
  line-height: 1.06;
  color: var(--paper);
}

.page-contact .respond-stat__label {
  display: block;
  margin-top: 8px;
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .04em;
  color: var(--mist);
}

.page-contact .media-frame {
  margin: 0;
}

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

.page-contact .media-frame__cap {
  margin-top: 12px;
  font-family: var(--font-meta);
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
}

/* 03 提问清单 */
.page-contact .checklist {
  display: grid;
  gap: 12px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--contact-tint);
  transition: border-color .25s var(--ease), background .25s var(--ease);
}

.page-contact .checklist__item:hover {
  border-color: var(--cyan-deep);
}

.page-contact .checklist__box {
  flex: 0 0 auto;
  position: relative;
  width: 24px;
  height: 24px;
  margin: 3px 0 0;
  border: 2px solid var(--cyan);
  border-radius: 6px;
  background: transparent;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  transition: background .2s var(--ease);
}

.page-contact .checklist__box:checked {
  background: var(--cyan);
}

.page-contact .checklist__box:checked::after {
  content: "";
  position: absolute;
  left: 7px;
  top: 2px;
  width: 6px;
  height: 12px;
  border: solid var(--ink-900);
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
}

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

.page-contact .checklist__label {
  display: flex;
  flex: 1 1 auto;
  gap: 14px;
  align-items: flex-start;
  cursor: pointer;
}

.page-contact .checklist__num {
  flex: 0 0 auto;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  line-height: 1.25;
  color: var(--cyan);
}

.page-contact .checklist__body {
  display: block;
}

.page-contact .checklist__title {
  display: block;
  font-family: var(--font-head);
  font-size: 17px;
  font-weight: 800;
  color: var(--paper);
}

.page-contact .checklist__desc {
  display: block;
  margin-top: 6px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.78;
  color: var(--mist);
}

.page-contact .tip {
  border-bottom: 1px dashed var(--cyan-deep);
  cursor: help;
}

.page-contact .contact-ask__more {
  margin: 22px 0 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

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

/* 04 合作与投稿 */
.page-contact .coop-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--contact-gap);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .coop-col {
  padding: clamp(18px, 2.6vw, 26px);
  border: 1px solid var(--line);
  border-radius: var(--contact-radius);
  background: var(--glass);
}

.page-contact .coop-col__title {
  margin: 0 0 16px;
  font-family: var(--font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--paper);
}

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

.page-contact .coop-list li {
  position: relative;
  padding-left: 20px;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--mist);
}

.page-contact .coop-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
}

.page-contact .contact-coop .media-frame {
  margin-top: clamp(22px, 3vw, 34px);
}

/* 05 运营与备案 */
.page-contact .records-panel {
  margin-top: clamp(20px, 3vw, 32px);
  padding: clamp(20px, 3vw, 30px);
  border: 1px solid var(--line);
  border-radius: var(--contact-radius);
  background: linear-gradient(150deg, var(--ink-800), var(--ink-900));
}

.page-contact .records-list {
  margin: 0;
  display: grid;
  gap: 18px;
}

.page-contact .records-list__row {
  display: block;
}

.page-contact .records-list dt {
  font-family: var(--font-meta);
  font-size: 14px;
  letter-spacing: .12em;
  color: var(--cyan-deep);
}

.page-contact .records-list dd {
  margin: 8px 0 0;
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--paper);
}

.page-contact .records-panel__links {
  margin: 24px 0 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .records-panel__links a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .contact-watermark {
  margin: 26px 0 0;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: clamp(40px, 9vw, 116px);
  line-height: 1;
  letter-spacing: .04em;
  color: var(--paper);
  opacity: .09;
  white-space: nowrap;
  overflow: hidden;
  user-select: none;
  pointer-events: none;
}

@media (min-width: 720px) {
  .page-contact .respond__stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (min-width: 900px) {
  .page-contact .channel-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-contact .channel-card--address {
    grid-column: 1 / -1;
  }
}

@media (min-width: 1024px) {
  .page-contact .channel-grid {
    grid-template-columns: 5fr 4fr 3fr;
    align-items: stretch;
  }

  .page-contact .channel-card--address {
    grid-column: auto;
  }

  .page-contact .respond {
    grid-template-columns: 7fr 4fr;
    align-items: start;
  }

  .page-contact .checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .page-contact .records-panel {
    display: grid;
    grid-template-columns: 8fr 4fr;
    gap: clamp(24px, 4vw, 48px);
    align-items: start;
  }

  .page-contact .records-panel__links {
    margin-top: 0;
    padding-top: 0;
    padding-left: 24px;
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-card,
  .page-contact .checklist__item,
  .page-contact .checklist__box {
    transition: none;
  }

  .page-contact .channel-card:hover {
    transform: none;
  }
}