.page-contact {
  background-color: var(--pearl);
  color: var(--ink);
  overflow-x: hidden;
}

.page-contact .contact-hero,
.page-contact .contact-topics,
.page-contact .contact-report,
.page-contact .contact-record,
.page-contact .contact-more {
  padding-block: clamp(40px, 7vw, 96px);
}

/* ---------- 面包屑 ---------- */
.page-contact .crumbs {
  margin: 0 0 clamp(24px, 4vw, 44px);
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--sea);
}
.page-contact .crumbs ol {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}
.page-contact .crumbs li + li::before {
  content: "/";
  margin-right: 8px;
  color: var(--line);
}
.page-contact .crumbs a {
  color: var(--sea);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}
.page-contact .crumbs a:hover {
  color: var(--deep);
  border-bottom-color: var(--coral);
}
.page-contact .crumbs [aria-current="page"] {
  color: var(--ink);
  font-weight: 700;
}

/* ---------- 通用排版微调 ---------- */
.page-contact .eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--sea);
  text-transform: uppercase;
}
.page-contact .section-title {
  margin: 0 0 16px;
  font-size: clamp(26px, 3.8vw, 42px);
  font-weight: 800;
  line-height: 1.18;
  letter-spacing: 0.03em;
  color: var(--ink);
}
.page-contact .prose {
  margin: 0;
  max-width: 62ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--sea-deep);
}
.page-contact .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-top: clamp(28px, 5vw, 60px);
  background-color: var(--pearl);
  background-image:
    linear-gradient(to right, rgba(62, 110, 126, 0.1) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(62, 110, 126, 0.1) 1px, transparent 1px);
  background-size: 72px 72px;
}
.page-contact .contact-hero::after {
  content: "40°52′N / 125°19′E";
  position: absolute;
  right: 14px;
  bottom: 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--line);
  pointer-events: none;
}
.page-contact .contact-hero__grid {
  display: grid;
  gap: clamp(30px, 5vw, 56px);
  grid-template-columns: minmax(0, 1fr);
}
.page-contact .contact-hero h1 {
  margin: 0 0 20px;
  font-family: var(--font-sans);
  font-weight: 800;
  font-size: clamp(32px, 6.4vw, 66px);
  line-height: 1.12;
  letter-spacing: 0.04em;
  color: var(--ink);
}
.page-contact .contact-hero .lede {
  margin: 0;
  max-width: 34em;
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.8;
  color: var(--sea-deep);
}

/* 邮箱主块 */
.page-contact .mailbox {
  margin-top: clamp(26px, 4vw, 44px);
  padding: clamp(18px, 3.2vw, 34px);
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-hard);
}
.page-contact .mailbox__label {
  margin: 0 0 12px;
  font-size: 11px;
  letter-spacing: 0.24em;
  color: var(--sea);
  text-transform: uppercase;
}
.page-contact .mailbox__addr {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(18px, 4.2vw, 38px);
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: 0.01em;
  color: var(--deep);
  text-decoration: none;
  overflow-wrap: anywhere;
  word-break: break-word;
  border-bottom: 2px solid transparent;
  transition: color 0.22s var(--ease), border-color 0.22s var(--ease);
}
.page-contact .mailbox__addr:hover {
  color: var(--coral);
  border-bottom-color: var(--coral);
}
.page-contact .mailbox__note {
  margin: 16px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--sea-deep);
}

/* 右侧信息块 */
.page-contact .contact-hero__side {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.page-contact .contact-figure {
  margin: 0;
  border: 2px solid var(--ink);
  background: var(--mist);
}
.page-contact .contact-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
}
.page-contact .infoblock {
  padding: clamp(18px, 3vw, 26px);
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-soft);
}
.page-contact .infoblock__title {
  margin: 0 0 14px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.26em;
  color: var(--sea);
}
.page-contact .infolist {
  margin: 0;
}
.page-contact .infolist__row {
  display: grid;
  gap: 4px;
  padding: 13px 0;
  border-top: 1px solid var(--line);
}
.page-contact .infolist__row:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-contact .infolist dt {
  font-size: 11.5px;
  letter-spacing: 0.2em;
  color: var(--sea);
}
.page-contact .infolist dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink);
  overflow-wrap: anywhere;
}
.page-contact .infolist dd a {
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--ink);
  text-decoration: none;
  border-bottom: 2px solid var(--coral);
}
.page-contact .infolist dd a:hover {
  color: var(--coral);
}
.page-contact .infolist__hint {
  display: block;
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--sea);
}

/* ---------- 问题分类 ---------- */
.page-contact .contact-topics__head {
  margin-bottom: clamp(24px, 4vw, 40px);
}
.page-contact .topiclist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-contact .topiclist__item {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 6px 18px;
  padding: clamp(18px, 2.6vw, 26px) 0;
  border-bottom: 1px solid var(--line);
}
.page-contact .topiclist__no {
  padding-top: 6px;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--coral);
}
.page-contact .topiclist__title {
  margin: 0;
  font-size: clamp(17px, 2.3vw, 23px);
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--ink);
}
.page-contact .topiclist__desc {
  grid-column: 2;
  margin: 0;
  max-width: 62ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--sea-deep);
}

/* ---------- 技术反馈 ---------- */
.page-contact .contact-report {
  background: var(--mist);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.page-contact .contact-report__grid {
  display: grid;
  gap: clamp(26px, 4vw, 52px);
  grid-template-columns: minmax(0, 1fr);
}
.page-contact .contact-report__lead .prose {
  max-width: 40ch;
}
.page-contact .steps {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 16px;
}
.page-contact .step {
  padding: clamp(16px, 2.4vw, 22px);
  background: var(--white);
  border: 2px solid var(--ink);
  box-shadow: var(--shadow-soft);
}
.page-contact .step__no {
  display: block;
  margin-bottom: 8px;
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--coral);
}
.page-contact .step__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.03em;
  color: var(--ink);
}
.page-contact .step__desc {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--sea-deep);
}

/* ---------- 备案 ---------- */
.page-contact .contact-record {
  position: relative;
  background: var(--deep);
  color: var(--pearl);
}
.page-contact .contact-record::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, rgba(246, 244, 238, 0.07) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(246, 244, 238, 0.07) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}
.page-contact .contact-record .wrap {
  position: relative;
  z-index: 1;
}
.page-contact .contact-record .eyebrow {
  color: var(--coral);
}
.page-contact .contact-record .section-title {
  color: var(--pearl);
}
.page-contact .contact-record .prose {
  max-width: 42ch;
  color: rgba(246, 244, 238, 0.8);
}
.page-contact .contact-record__grid {
  display: grid;
  gap: clamp(28px, 4vw, 48px);
  grid-template-columns: minmax(0, 1fr);
}
.page-contact .contact-record__icp {
  display: inline-block;
  margin: 22px 0 0;
  padding: 12px 18px;
  border: 2px solid var(--coral);
  font-size: clamp(15px, 2.4vw, 22px);
  font-weight: 600;
  color: var(--pearl);
  overflow-wrap: anywhere;
}
.page-contact .recordlist {
  margin: 26px 0 0;
}
.page-contact .recordlist__row {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 4px 18px;
  padding: 13px 0;
  border-top: 1px solid rgba(246, 244, 238, 0.22);
  font-size: 13.5px;
  line-height: 1.7;
}
.page-contact .recordlist dt {
  letter-spacing: 0.14em;
  color: rgba(246, 244, 238, 0.66);
}
.page-contact .recordlist dd {
  margin: 0;
  text-align: right;
  color: var(--pearl);
}
.page-contact .contact-record__figure {
  margin: 0;
  border: 2px solid rgba(246, 244, 238, 0.36);
}
.page-contact .contact-record__figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 5 / 3;
  object-fit: cover;
}

/* ---------- 答疑引导 ---------- */
.page-contact .contact-more__grid {
  display: grid;
  gap: clamp(28px, 4vw, 56px);
  grid-template-columns: minmax(0, 1fr);
}
.page-contact .contact-more__lead .prose {
  max-width: 38ch;
  margin-bottom: 22px;
}
.page-contact .linklist {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}
.page-contact .linklist li {
  border-bottom: 1px solid var(--line);
}
.page-contact .linklist a {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 4px 18px;
  padding: 18px 0;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--ink);
  text-decoration: none;
  transition: color 0.22s var(--ease), padding-left 0.22s var(--ease);
}
.page-contact .linklist a span {
  font-size: 12.5px;
  font-weight: 400;
  letter-spacing: 0.04em;
  color: var(--sea);
}
.page-contact .linklist a:hover {
  color: var(--coral);
  padding-left: 8px;
}
.page-contact .linklist a:hover span {
  color: var(--sea-deep);
}

/* ---------- 响应式 ---------- */
@media (min-width: 620px) {
  .page-contact .infolist__row {
    grid-template-columns: 92px minmax(0, 1fr);
    gap: 6px 18px;
    align-items: baseline;
  }
}

@media (min-width: 900px) {
  .page-contact .contact-hero__grid {
    grid-template-columns: minmax(0, 1.12fr) minmax(0, 0.88fr);
    align-items: start;
  }
  .page-contact .contact-hero__side {
    position: sticky;
    top: 108px;
  }
  .page-contact .contact-report__grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
    align-items: start;
  }
  .page-contact .contact-record__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr);
    align-items: center;
  }
  .page-contact .contact-more__grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
    align-items: start;
  }
  .page-contact .topiclist__item {
    grid-template-columns: 52px minmax(0, 1fr);
  }
}

@media (min-width: 1100px) {
  .page-contact .steps {
    gap: 20px;
  }
  .page-contact .topiclist__desc {
    grid-column: 2;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }
}