.page-contact {
  --pc-pad: clamp(48px, 7vw, 88px);
  background: var(--ink);
  color: var(--white);
}

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

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 18px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.page-contact .crumbs__link {
  color: var(--muted);
  text-decoration: none;
  transition: color 0.24s var(--ease);
}

.page-contact .crumbs__link:hover {
  color: var(--neon);
}

.page-contact .crumbs__sep {
  color: var(--line);
}

.page-contact .crumbs__current {
  color: var(--white);
}

/* ---------- 页首坐标区 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 4vw, 40px) 0 clamp(48px, 7vw, 84px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  left: 50%;
  top: 10px;
  width: min(1400px, 150vw);
  height: min(1400px, 150vw);
  transform: translateX(-50%);
  background-image: repeating-radial-gradient(circle, var(--line-soft) 0 1px, transparent 1px 98px);
  -webkit-mask-image: radial-gradient(circle, #000 0 32%, transparent 66%);
  mask-image: radial-gradient(circle, #000 0 32%, transparent 66%);
  opacity: 0.6;
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}

.page-contact .contact-hero__cross {
  width: clamp(92px, 15vw, 148px);
  height: auto;
  color: var(--neon);
}

.page-contact .contact-hero h1 {
  margin: 0;
  max-width: 24ch;
}

.page-contact .contact-hero__lede {
  margin: 0 auto;
  max-width: 60ch;
  color: var(--muted);
}

.page-contact .contact-hero__frame {
  width: 100%;
  max-width: 1040px;
  margin-top: clamp(16px, 3vw, 30px);
  border: 1px solid var(--line);
  background: var(--ink-2);
}

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

/* ---------- 分区通用 ---------- */
.page-contact .contact-channels,
.page-contact .contact-brief,
.page-contact .contact-timing,
.page-contact .contact-subscribe,
.page-contact .contact-ask {
  padding-block: var(--pc-pad);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-brief,
.page-contact .contact-ask {
  background: var(--ink-2);
}

.page-contact .contact-sec__head {
  display: flex;
  flex-direction: column;
  gap: 12px;
  max-width: 70ch;
}

.page-contact .contact-sec__head h2 {
  margin: 0;
}

.page-contact .contact-sec__head .lede {
  margin: 0;
  color: var(--muted);
}

/* ---------- 三条通道卡片 ---------- */
.page-contact .channel-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
  margin-top: clamp(26px, 4vw, 48px);
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: clamp(22px, 3vw, 30px);
  background: var(--ink-2);
  border: 1px solid var(--line);
  transition: border-color 0.32s var(--ease), transform 0.32s var(--ease);
}

.page-contact .contact-brief .channel-card,
.page-contact .contact-ask .channel-card {
  background: var(--ink);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 20px;
  width: 3px;
  height: 44px;
  background: var(--orange);
}

.page-contact .channel-card:hover {
  border-color: var(--neon);
  transform: translateY(-4px);
}

.page-contact .channel-card__title {
  margin: 0;
  font-family: var(--font-sans);
  font-size: clamp(19px, 2vw, 22px);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .channel-card__use {
  margin: auto 0 0;
  padding-top: 13px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.65;
  color: var(--muted);
  opacity: 0.74;
  transition: opacity 0.3s var(--ease), color 0.3s var(--ease);
}

.page-contact .channel-card:hover .channel-card__use {
  opacity: 1;
  color: var(--white);
}

.page-contact .channel-card .copy-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-block: 12px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .copy-row__value {
  flex: 1 1 180px;
  min-width: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 1.7vw, 17px);
  line-height: 1.5;
  letter-spacing: 0.01em;
  color: var(--neon);
  word-break: break-word;
}

/* ---------- 四样信息 ---------- */
.page-contact .brief-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 52px);
  align-items: center;
}

.page-contact .brief-grid__media {
  border: 1px solid var(--line);
  background: var(--ink);
}

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

.page-contact .brief-grid__body h2 {
  margin: 6px 0 12px;
}

.page-contact .brief-grid__body .lede {
  margin: 0;
  color: var(--muted);
}

.page-contact .checklist {
  display: grid;
  gap: 1px;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
  list-style: none;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .checklist__item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--ink);
}

.page-contact .checklist__box {
  flex: 0 0 auto;
  position: relative;
  width: 22px;
  height: 22px;
  margin-top: 2px;
  padding: 0;
  border: 1px solid var(--line);
  background: transparent;
  cursor: pointer;
  transition: border-color 0.24s var(--ease);
}

.page-contact .checklist__box::after {
  content: "";
  position: absolute;
  inset: 5px;
  background: var(--neon);
  transform: scale(0);
  transition: transform 0.24s var(--ease);
}

.page-contact .checklist__box:hover {
  border-color: var(--neon);
}

.page-contact .checklist__box.is-done,
.page-contact .checklist__box[aria-pressed="true"] {
  border-color: var(--neon);
}

.page-contact .checklist__box.is-done::after,
.page-contact .checklist__box[aria-pressed="true"]::after {
  transform: scale(1);
}

.page-contact .checklist__text {
  flex: 1 1 auto;
  min-width: 0;
}

.page-contact .checklist__text strong {
  display: block;
  margin-bottom: 5px;
  font-family: var(--font-sans);
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--white);
}

.page-contact .checklist__text p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .brief-grid__note {
  margin: clamp(18px, 2.6vw, 26px) 0 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .text-link {
  color: var(--neon);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 192, 0.38);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-contact .text-link:hover {
  color: var(--neon-soft);
  border-bottom-color: var(--neon-soft);
}

/* ---------- 回音节奏 ---------- */
.page-contact .timeline__list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 30px;
  margin: clamp(28px, 4vw, 50px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .timeline__item {
  position: relative;
  padding-top: 30px;
}

.page-contact .timeline__item::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--line);
}

.page-contact .timeline__item::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 9px;
  height: 9px;
  border: 1px solid var(--neon);
  background: var(--ink);
  transform: translateY(-50%) rotate(45deg);
}

.page-contact .timeline__num {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--orange);
}

.page-contact .timeline__item h3 {
  margin: 0 0 8px;
  font-family: var(--font-sans);
  font-size: 17.5px;
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--white);
}

.page-contact .timeline__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 订阅 ---------- */
.page-contact .subscribe {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 46px);
  padding: clamp(24px, 4vw, 48px);
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 92% 8%, rgba(47, 227, 192, 0.16), transparent 58%),
    radial-gradient(circle at 4% 100%, rgba(255, 154, 60, 0.12), transparent 52%),
    var(--ink-2);
}

.page-contact .subscribe h2 {
  margin: 6px 0 12px;
}

.page-contact .subscribe__lede {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

.page-contact .subscribe__list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .subscribe__list li {
  position: relative;
  padding-left: 20px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

.page-contact .subscribe__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75em;
  width: 10px;
  height: 1px;
  background: var(--neon);
}

.page-contact .subscribe__action {
  display: grid;
  gap: 14px;
  align-content: start;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.page-contact .subscribe__hint {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  color: var(--warn);
}

.page-contact .copy-row--stack {
  display: grid;
  gap: 12px;
  justify-items: start;
}

.page-contact .subscribe__foot {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--muted);
}

/* ---------- 首次联系三问 ---------- */
.page-contact .ask-list {
  display: grid;
  gap: 1px;
  margin-top: clamp(26px, 4vw, 46px);
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .ask {
  padding: clamp(20px, 3vw, 30px);
  background: var(--ink-2);
}

.page-contact .ask__q {
  margin: 0 0 10px;
  font-family: var(--font-sans);
  font-size: clamp(16.5px, 1.6vw, 19px);
  font-weight: 700;
  letter-spacing: 0.03em;
  color: var(--white);
}

.page-contact .ask__q::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 1px;
  margin-right: 10px;
  vertical-align: middle;
  background: var(--orange);
}

.page-contact .ask p {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--muted);
}

/* ---------- 响应式 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-hero {
    padding-top: clamp(28px, 5vw, 52px);
  }

  .page-contact .channel-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .channel-card:nth-child(2) {
    margin-top: 46px;
  }

  .page-contact .channel-card:nth-child(3) {
    margin-top: 92px;
  }

  .page-contact .timeline__list {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 40px;
  }
}

@media (min-width: 940px) {
  .page-contact .brief-grid {
    grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  }

  .page-contact .subscribe {
    grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .subscribe__action {
    padding-top: 0;
    padding-left: 32px;
    border-top: 0;
    border-left: 1px solid var(--line);
  }
}

@media (max-width: 759px) {
  .page-contact .channel-card:nth-child(n) {
    margin-top: 0;
  }

  .page-contact .contact-hero__frame .frame__caption {
    position: static;
  }
}