.page-contact {
  --pc-border: 2px solid var(--hairline-strong);
  --pc-hard: 9px 9px 0 rgba(0, 0, 0, 0.45);
  --pc-hard-hot: 11px 11px 0 rgba(255, 59, 92, 0.34);
  display: block;
  background: var(--night);
  color: var(--paper);
}

.page-contact .breadcrumb {
  padding-block: 16px 0;
  font-size: 13px;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  margin-top: 14px;
  padding: clamp(30px, 6vw, 74px) 0 clamp(32px, 6vw, 68px);
  background:
    radial-gradient(110% 88% at 90% 4%, rgba(200, 16, 46, 0.5), transparent 60%),
    radial-gradient(80% 70% at 4% 96%, rgba(43, 179, 255, 0.14), transparent 62%),
    linear-gradient(180deg, #0b0b0f 0%, #15151c 100%);
  border-top: var(--pc-border);
  border-bottom: 3px solid var(--red);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: repeating-linear-gradient(
    0deg,
    rgba(243, 239, 231, 0.05) 0 1px,
    transparent 1px 7px
  );
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__kicker {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: 0.24em;
  color: var(--gold);
  text-transform: uppercase;
}

.page-contact .contact-hero__title {
  margin: 0;
  max-width: 22ch;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(30px, 8.4vw, 68px);
  line-height: 1.02;
  letter-spacing: -0.02em;
  text-shadow: 4px 4px 0 rgba(200, 16, 46, 0.55);
}

.page-contact .contact-hero__hl {
  display: inline-block;
  padding: 0.04em 0.16em 0.1em;
  background: var(--red);
  color: #ffffff;
  box-shadow: 6px 6px 0 rgba(11, 11, 15, 0.85);
}

.page-contact .contact-hero__lede {
  margin: 22px 0 0;
  max-width: var(--measure);
  font-family: var(--font-body);
  font-size: clamp(15px, 2.2vw, 18px);
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 26px;
}

.page-contact .contact-hero__meta-item {
  padding: 7px 12px;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--paper);
  background: rgba(28, 28, 34, 0.85);
  border: 1px solid var(--hairline-strong);
  overflow-wrap: anywhere;
}

/* ---------- 通用区块间距 ---------- */

.page-contact .contact-channels,
.page-contact .contact-check,
.page-contact .contact-partner,
.page-contact .contact-base {
  padding-block: clamp(44px, 7vw, 88px);
}

.page-contact .section-head {
  border-bottom: 2px solid var(--hairline-strong);
  padding-bottom: 12px;
}

/* ---------- 渠道 ---------- */

.page-contact .contact-channels__lede {
  margin: 20px 0 0;
  max-width: var(--measure);
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .contact-channels__figure {
  margin: 26px 0 0;
  border: var(--pc-border);
  box-shadow: var(--pc-hard);
}

.page-contact .contact-cards {
  list-style: none;
  margin: 30px 0 0;
  padding: 0;
  display: grid;
  gap: 18px;
}

.page-contact .contact-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 24px 20px 22px;
  background: var(--carbon);
  border: var(--pc-border);
  box-shadow: var(--pc-hard);
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease),
    border-color 0.24s var(--ease);
}

.page-contact .contact-card:hover {
  transform: translate(-4px, -4px);
  border-color: var(--neon);
  box-shadow: var(--pc-hard-hot);
}

.page-contact .contact-card__idx {
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-contact .contact-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--paper);
}

.page-contact .contact-card__desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--muted);
}

.page-contact .contact-card__value {
  display: block;
  width: 100%;
  margin-top: auto;
  padding: 14px 14px;
  text-align: left;
  font-family: var(--font-mono);
  font-size: clamp(13px, 3.4vw, 16px);
  font-weight: 700;
  line-height: 1.4;
  color: var(--night);
  background: var(--paper);
  border: 2px solid var(--night);
  cursor: copy;
  overflow-wrap: anywhere;
  transition: background 0.2s var(--ease), color 0.2s var(--ease);
}

.page-contact .contact-card__value:hover,
.page-contact .contact-card__value:focus-visible {
  background: var(--blue);
  color: var(--night);
  outline: none;
}

.page-contact .contact-card__value--addr {
  font-size: clamp(12px, 3vw, 14px);
  letter-spacing: 0.01em;
}

.page-contact .contact-card__scope {
  margin: 0;
  padding-left: 12px;
  font-size: 13px;
  line-height: 1.65;
  color: var(--muted-dim);
  border-left: 3px solid var(--hairline);
  transition: color 0.24s var(--ease), border-color 0.24s var(--ease);
}

.page-contact .contact-card:hover .contact-card__scope {
  color: var(--neon);
  border-left-color: var(--neon);
}

/* ---------- 邮件标题写法 ---------- */

.page-contact .contact-subject {
  padding-block: clamp(44px, 7vw, 88px);
  background: var(--carbon);
  border-top: var(--pc-border);
  border-bottom: var(--pc-border);
}

.page-contact .contact-subject__grid {
  display: grid;
  gap: 30px;
}

.page-contact .contact-subject__lede {
  margin: 20px 0 0;
  max-width: var(--measure);
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .subject-rules {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 16px;
}

.page-contact .subject-rule {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 14px;
  padding: 16px 16px 16px 0;
  border-top: 1px solid var(--hairline);
}

.page-contact .subject-rule__idx {
  display: flex;
  align-items: center;
  justify-content: center;
  align-self: start;
  width: 44px;
  height: 44px;
  font-size: 15px;
  font-weight: 700;
  color: var(--night);
  background: var(--gold);
  box-shadow: 4px 4px 0 rgba(11, 11, 15, 0.8);
}

.page-contact .subject-rule__body {
  display: grid;
  gap: 6px;
}

.page-contact .subject-rule__head {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

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

.page-contact .contact-subject__media {
  margin: 0;
  border: var(--pc-border);
  box-shadow: var(--pc-hard);
}

/* ---------- 自查清单 ---------- */

.page-contact .contact-check__lede {
  margin: 20px 0 0;
  max-width: var(--measure);
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .checklist {
  list-style: none;
  margin: 28px 0 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.page-contact .checklist__item {
  border: 2px solid var(--hairline);
  background: rgba(28, 28, 34, 0.6);
  transition: border-color 0.2s var(--ease);
}

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

.page-contact .checklist__label {
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 12px;
  align-items: start;
  padding: 16px 16px;
  cursor: pointer;
}

.page-contact .checklist__input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
  pointer-events: none;
}

.page-contact .checklist__box {
  position: relative;
  width: 24px;
  height: 24px;
  margin-top: 2px;
  border: 2px solid var(--hairline-strong);
  background: var(--night);
  transition: background 0.18s var(--ease), border-color 0.18s var(--ease);
}

.page-contact .checklist__box::after {
  content: "";
  position: absolute;
  left: 6px;
  top: 1px;
  width: 8px;
  height: 14px;
  border-right: 3px solid var(--night);
  border-bottom: 3px solid var(--night);
  transform: rotate(42deg) scale(0);
  transition: transform 0.18s var(--ease);
}

.page-contact .checklist__input:checked + .checklist__box {
  background: var(--green);
  border-color: var(--green);
}

.page-contact .checklist__input:checked + .checklist__box::after {
  transform: rotate(42deg) scale(1);
}

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

.page-contact .checklist__input:checked ~ .checklist__text {
  color: var(--muted-dim);
}

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

.page-contact .checklist__strong {
  display: block;
  margin-bottom: 4px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 17px;
  color: var(--paper);
}

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

.page-contact .contact-check__foot {
  margin: 22px 0 0;
  padding: 14px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--paper);
  background: rgba(200, 16, 46, 0.16);
  border-left: 4px solid var(--red);
}

/* ---------- 合作 ---------- */

.page-contact .contact-partner {
  background: linear-gradient(180deg, #0b0b0f 0%, #131319 100%);
  border-top: var(--pc-border);
}

.page-contact .contact-partner__lede {
  margin: 20px 0 0;
  max-width: var(--measure);
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
}

.page-contact .partner-grid {
  display: grid;
  gap: 18px;
  margin-top: 30px;
}

.page-contact .partner-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 22px 20px;
  background: var(--night);
  border: var(--pc-border);
  box-shadow: var(--pc-hard);
  transition: transform 0.24s var(--ease), box-shadow 0.24s var(--ease);
}

.page-contact .partner-card:hover {
  transform: translate(-4px, -4px);
  box-shadow: var(--pc-hard-hot);
}

.page-contact .partner-card__tag {
  align-self: flex-start;
  padding: 5px 10px;
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--night);
  background: var(--blue);
}

.page-contact .partner-card__title {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: 19px;
  line-height: 1.35;
  color: var(--paper);
}

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

.page-contact .contact-partner__foot {
  margin: 26px 0 0;
  max-width: 60ch;
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted-dim);
}

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

/* ---------- 通信地址与备案 ---------- */

.page-contact .contact-base__panel {
  position: relative;
  padding: 30px 22px 26px;
  border: 2px solid var(--night);
  box-shadow: 12px 12px 0 rgba(200, 16, 46, 0.9);
}

.page-contact .contact-base__badge {
  position: absolute;
  top: -14px;
  right: 16px;
  padding: 6px 12px;
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--paper);
  background: var(--night);
  border: 2px solid var(--gold);
}

.page-contact .contact-base__title {
  color: var(--night);
}

.page-contact .contact-base .section-head {
  border-bottom-color: rgba(28, 28, 34, 0.35);
}

.page-contact .contact-base .section-head__idx {
  color: #7a2029;
}

.page-contact .contact-base .data-list__row {
  border-bottom-color: rgba(28, 28, 34, 0.18);
}

.page-contact .contact-base__list {
  margin-top: 18px;
}

.page-contact .contact-base__val {
  color: var(--night);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.page-contact .contact-base__note {
  margin: 20px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: #3f4149;
}

.page-contact .contact-base__note a {
  color: var(--red);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 结尾大号邮箱 ---------- */

.page-contact .contact-signoff {
  padding-block: clamp(44px, 7vw, 82px);
  background:
    radial-gradient(90% 100% at 50% 0%, rgba(255, 59, 92, 0.24), transparent 68%),
    var(--night);
  border-top: 3px solid var(--red);
}

.page-contact .contact-signoff__inner {
  display: grid;
  gap: 16px;
}

.page-contact .contact-signoff__label {
  margin: 0;
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--gold);
}

.page-contact .contact-signoff__mail {
  display: block;
  width: 100%;
  padding: 0;
  text-align: left;
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: clamp(21px, 6.6vw, 58px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  color: var(--paper);
  background: none;
  border: none;
  cursor: copy;
  overflow-wrap: anywhere;
  transition: color 0.2s var(--ease), text-shadow 0.2s var(--ease);
}

.page-contact .contact-signoff__mail:hover,
.page-contact .contact-signoff__mail:focus-visible {
  color: var(--neon);
  text-shadow: 5px 5px 0 rgba(200, 16, 46, 0.5);
  outline: none;
}

.page-contact .contact-signoff__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px;
  margin-top: 4px;
}

.page-contact .contact-signoff__hint {
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--muted-dim);
}

.page-contact [data-copy][data-copied] {
  position: relative;
}

.page-contact [data-copy][data-copied]::after {
  content: "已复制";
  position: absolute;
  top: -12px;
  right: 0;
  padding: 3px 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--night);
  background: var(--green);
  pointer-events: none;
}

/* ---------- 响应式 ---------- */

@media (min-width: 760px) {
  .page-contact .contact-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .checklist {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .partner-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px;
  }

  .page-contact .contact-subject__grid {
    grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
    gap: 40px;
    align-items: start;
  }

  .page-contact .contact-base__panel {
    padding: 40px 38px 34px;
  }
}

@media (min-width: 1100px) {
  .page-contact .contact-hero__title {
    max-width: 26ch;
  }

  .page-contact .contact-hero__meta {
    position: absolute;
    right: 0;
    bottom: 6px;
    flex-direction: column;
    align-items: flex-end;
    margin-top: 0;
  }

  .page-contact .contact-hero__inner {
    position: relative;
    padding-bottom: 18px;
  }
}

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

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