.page-contact {
  --contact-gap: clamp(22px, 4vw, 48px);
  --contact-pad: clamp(20px, 3vw, 30px);
  color: var(--ink);
}

.page-contact .breadcrumbs {
  padding-top: clamp(16px, 3vw, 26px);
  font-size: 13px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding: clamp(22px, 4vw, 44px) 0 clamp(38px, 6vw, 76px);
  border-bottom: 1px solid var(--line);
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(to right, var(--line-soft) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line-soft) 1px, transparent 1px);
  background-size: 88px 88px;
  -webkit-mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .6), transparent 82%);
  mask-image: linear-gradient(to bottom, rgba(0, 0, 0, .6), transparent 82%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
}

.page-contact .contact-hero__lead {
  min-width: 0;
}

.page-contact .eyebrow {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--steel);
}

.page-contact .page-head__title {
  margin: 14px 0 0;
  max-width: 18ch;
  font-family: var(--font-head);
  font-size: clamp(32px, 8vw, 60px);
  font-weight: 800;
  line-height: 1.06;
  letter-spacing: -.02em;
  color: var(--indigo);
}

.page-contact .lede {
  margin: 20px 0 0;
  max-width: 44ch;
  font-size: clamp(15px, 2vw, 17px);
  line-height: 1.85;
  color: var(--steel);
}

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

.page-contact .channel-jump__link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--indigo);
  text-decoration: none;
  background: rgba(255, 255, 255, .74);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 10px), calc(100% - 10px) 100%, 0 100%);
  transition: background .22s var(--ease), border-color .22s var(--ease), color .22s var(--ease);
}

.page-contact .channel-jump__link::before {
  content: "/";
  color: var(--cyan);
  font-weight: 700;
}

.page-contact .channel-jump__link:hover,
.page-contact .channel-jump__link:focus-visible {
  background: var(--grad-soft);
  border-color: var(--cyan);
  color: var(--indigo);
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

/* ---------- 首屏右侧联系卡 ---------- */
.page-contact .hero-card {
  position: relative;
  min-width: 0;
}

.page-contact .hero-card__frame {
  margin: 0;
  overflow: hidden;
  background: var(--sky);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - 22px) 0, 100% 22px, 100% 100%, 22px 100%, 0 calc(100% - 22px));
}

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

.page-contact .hero-card__strip {
  position: relative;
  margin-top: 14px;
  padding: 22px 22px 24px;
  background: var(--ink);
  color: var(--paper);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 16px), calc(100% - 16px) 100%, 0 100%);
}

.page-contact .hero-card__strip::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 3px;
  background: var(--grad);
}

.page-contact .hero-card__label {
  margin: 0;
  font-size: 11px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .hero-card__value {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.5;
  word-break: break-all;
  color: var(--paper);
}

.page-contact .hero-card__note {
  margin: 14px 0 0;
  font-size: 12px;
  letter-spacing: .04em;
  color: rgba(247, 250, 252, .7);
}

/* ---------- 主体栏式布局 ---------- */
.page-contact .contact-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 54px);
  padding: clamp(34px, 6vw, 70px) 0 clamp(46px, 8vw, 90px);
}

.page-contact .contact-body {
  min-width: 0;
}

.page-contact .contact-index {
  display: none;
}

.page-contact .section {
  padding: clamp(26px, 4vw, 44px) 0;
  border-top: 1px solid var(--line);
}

.page-contact .section:first-child {
  padding-top: 0;
  border-top: 0;
}

.page-contact .section__head {
  min-width: 0;
}

.page-contact .section__index {
  margin: 0;
  font-size: 12px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .section__title {
  margin: 10px 0 0;
  font-family: var(--font-head);
  font-size: clamp(23px, 4vw, 34px);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.01em;
  color: var(--indigo);
}

.page-contact .section__note {
  margin: 12px 0 0;
  max-width: 42em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 渠道列表 ---------- */
.page-contact .channel-list {
  list-style: none;
  margin: clamp(20px, 3vw, 32px) 0 0;
  padding: 0;
}

.page-contact .channel-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 8px;
  padding: 20px 0;
  border-top: 1px solid var(--line-soft);
}

.page-contact .channel-row:first-child {
  border-top: 0;
}

.page-contact .channel-row__body {
  min-width: 0;
}

.page-contact .channel-row__tag {
  font-size: 12px;
  letter-spacing: .18em;
  color: var(--cyan);
}

.page-contact .channel-row__title {
  margin: 0;
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .channel-row__value {
  margin: 8px 0 0;
  font-size: 15px;
  line-height: 1.6;
  color: var(--indigo);
  word-break: break-all;
}

.page-contact .channel-row__desc {
  margin: 10px 0 0;
  max-width: 44em;
  font-size: 15px;
  line-height: 1.85;
  color: var(--steel);
}

/* ---------- 合作方向 ---------- */
.page-contact .biz-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 16px;
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .biz-card {
  position: relative;
  padding: 26px 22px 28px;
  background: var(--sand);
  clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%);
}

.page-contact .biz-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 52px;
  height: 3px;
  background: var(--grad);
}

.page-contact .biz-card__num {
  margin: 0;
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--steel);
}

.page-contact .biz-card__title {
  margin: 12px 0 0;
  font-family: var(--font-head);
  font-size: 19px;
  font-weight: 800;
  color: var(--indigo);
}

.page-contact .biz-card__text {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-contact .start-note {
  margin: 18px 0 0;
  padding: 20px 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
  background: var(--sky);
  border-left: 3px solid var(--cyan);
  word-break: break-word;
}

/* ---------- 紧急反馈 ---------- */
.page-contact .urgent-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(20px, 3vw, 32px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .urgent-panel {
  min-width: 0;
  padding: var(--contact-pad);
  background: var(--sky);
  clip-path: polygon(0 0, 100% 0, 100% calc(100% - 18px), calc(100% - 18px) 100%, 0 100%);
}

.page-contact .urgent-panel__lead {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.page-contact .urgent-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 12px;
}

.page-contact .urgent-list li {
  position: relative;
  padding-left: 22px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--indigo);
}

.page-contact .urgent-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .62em;
  width: 10px;
  height: 1px;
  background: var(--coral);
}

.page-contact .urgent-figure {
  margin: 0;
  overflow: hidden;
  min-width: 0;
  background: var(--paper);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%);
}

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

.page-contact .urgent-figure figcaption {
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--steel);
  border-top: 1px solid var(--line-soft);
}

/* ---------- 回复说明 ---------- */
.page-contact .reply-list {
  margin: clamp(20px, 3vw, 32px) 0 0;
  display: grid;
  gap: 0;
}

.page-contact .reply-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-soft);
}

.page-contact .reply-row:first-child {
  border-top: 1px solid var(--line-soft);
}

.page-contact .reply-row__key {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .06em;
  color: var(--indigo);
}

.page-contact .reply-row__val {
  margin: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

/* ---------- 联系信息卡 ---------- */
.page-contact .info-card {
  margin-top: clamp(20px, 3vw, 34px);
  background: var(--paper);
  border: 1px solid var(--line-strong);
  clip-path: polygon(0 0, calc(100% - 24px) 0, 100% 24px, 100% 100%, 0 100%);
  overflow: hidden;
}

.page-contact .info-card__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line-soft);
  transition: background .22s var(--ease);
}

.page-contact .info-card__row:hover {
  background: var(--sky);
}

.page-contact .info-card__label {
  font-size: 12px;
  letter-spacing: .16em;
  color: var(--steel);
}

.page-contact .info-card__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 15px;
  line-height: 1.6;
  color: var(--indigo);
  word-break: break-all;
}

.page-contact .info-card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px 14px;
  margin: 0;
  padding: 16px 20px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink);
  background: var(--sand);
}

.page-contact .contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .contact-links__item {
  position: relative;
  padding-left: 14px;
  font-size: 14px;
  color: var(--indigo);
  text-decoration: none;
  transition: color .2s var(--ease);
}

.page-contact .contact-links__item::before {
  content: "";
  position: absolute;
  left: 0;
  top: .55em;
  width: 6px;
  height: 6px;
  background: var(--cyan);
  clip-path: polygon(0 0, 100% 50%, 0 100%);
}

.page-contact .contact-links__item:hover,
.page-contact .contact-links__item:focus-visible {
  color: var(--coral-ink);
}

/* ---------- 响应式 ---------- */
@media (min-width: 720px) {
  .page-contact .channel-row {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 18px;
    padding: 22px 0;
  }

  .page-contact .channel-row__tag {
    padding-top: 4px;
  }

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

  .page-contact .reply-row,
  .page-contact .info-card__row {
    grid-template-columns: 132px minmax(0, 1fr);
    gap: 20px;
    align-items: baseline;
  }

  .page-contact .info-card__row {
    padding: 18px 24px;
  }

  .page-contact .info-card__foot {
    padding: 16px 24px;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
    align-items: start;
  }

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

  .page-contact .urgent-grid {
    grid-template-columns: minmax(0, 6fr) minmax(0, 6fr);
    align-items: center;
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-layout {
    grid-template-columns: 214px minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .contact-index {
    display: flex;
    flex-direction: column;
    gap: 2px;
    position: sticky;
    top: 128px;
    padding-left: 16px;
    border-left: 1px solid var(--line);
  }

  .page-contact .contact-index .chapter-index__link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 9px 0;
    font-size: 14px;
    color: var(--steel);
    text-decoration: none;
    transition: color .2s var(--ease);
  }

  .page-contact .contact-index .chapter-index__link::before {
    content: "";
    flex: 0 0 6px;
    width: 6px;
    height: 6px;
    background: transparent;
    clip-path: polygon(0 0, 100% 50%, 0 100%);
    transition: background .2s var(--ease);
  }

  .page-contact .contact-index .chapter-index__link .mono {
    font-size: 12px;
    color: var(--cyan);
  }

  .page-contact .contact-index .chapter-index__link:hover,
  .page-contact .contact-index .chapter-index__link[data-active="true"] {
    color: var(--indigo);
  }

  .page-contact .contact-index .chapter-index__link[data-active="true"]::before {
    background: var(--coral);
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .channel-jump__link,
  .page-contact .info-card__row,
  .page-contact .contact-links__item,
  .page-contact .contact-index .chapter-index__link {
    transition: none;
  }
}