.page-contact {
  --contact-pad: clamp(18px, 2.4vw, 30px);
  --contact-gap: clamp(14px, 1.8vw, 24px);
  --contact-title: clamp(30px, 4.6vw, 62px);
  --contact-sub: clamp(20px, 2.4vw, 30px);
}

/* ---------- 页头横幅 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  border-bottom: var(--line);
  padding: clamp(38px, 6.5vh, 84px) 0 clamp(34px, 5.5vh, 72px);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
}

.page-contact .contact-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.34;
  filter: saturate(0.9);
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, var(--ink) 4%, rgba(7, 11, 30, 0.72) 48%, rgba(7, 11, 30, 0.25) 100%),
    linear-gradient(180deg, rgba(7, 11, 30, 0.55) 0%, rgba(7, 11, 30, 0.9) 100%);
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  gap: clamp(14px, 2vh, 22px);
  max-width: 880px;
}

.page-contact .contact-hero__title {
  margin: 0;
  font-size: var(--contact-title);
  line-height: 1.08;
  color: var(--text);
  max-width: 18ch;
}

.page-contact .contact-hero__lede {
  margin: 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .contact-hero__hint {
  margin: 0;
  padding-top: clamp(8px, 1.4vh, 16px);
  border-top: 1px solid var(--grid);
  font-size: clamp(13px, 1.5vw, 19px);
  letter-spacing: 0.02em;
  color: var(--amber);
  word-break: break-all;
  max-width: 100%;
}

/* ---------- 章节通用 ---------- */
.page-contact .section-lede {
  margin: clamp(10px, 1.6vh, 18px) 0 0;
  max-width: 68ch;
  font-size: clamp(15px, 1.1vw, 17px);
  line-height: 1.78;
  color: var(--muted);
}

/* ---------- 三张错落卡片 ---------- */
.page-contact .contact-cards {
  display: grid;
  gap: var(--contact-gap);
  grid-template-columns: 1fr;
}

.page-contact .contact-card {
  display: flex;
  flex-direction: column;
  gap: clamp(8px, 1.2vh, 14px);
  padding: var(--contact-pad);
  border: 1px solid var(--grid);
  background: var(--panel);
  transition: border-color var(--t-fast), transform var(--t-fast), background-color var(--t-fast);
}

.page-contact .contact-card:hover,
.page-contact .contact-card:focus-within {
  border-color: var(--volt);
  transform: translateY(-2px);
  background-color: #14204a;
}

.page-contact .contact-card__name {
  margin: 0;
  font-size: clamp(20px, 2.1vw, 26px);
  line-height: 1.4;
  color: var(--text);
}

.page-contact .contact-card__value {
  margin: 0;
  font-size: clamp(17px, 2vw, 27px);
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--amber);
  word-break: break-all;
}

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

.page-contact .contact-card--mail .contact-card__body:last-child {
  padding-top: clamp(8px, 1.2vh, 14px);
  border-top: 1px solid var(--grid);
}

@media (min-width: 760px) {
  .page-contact .contact-cards {
    grid-template-columns: 1.55fr 1fr;
    grid-template-rows: auto auto;
    align-items: start;
  }

  .page-contact .contact-card--mail {
    grid-column: 1;
    grid-row: 1 / span 2;
  }

  .page-contact .contact-card--phone {
    grid-column: 2;
    grid-row: 1;
  }

  .page-contact .contact-card--addr {
    grid-column: 2;
    grid-row: 2;
    margin-top: clamp(14px, 2.6vw, 40px);
  }
}

/* ---------- 左标题右内容 ---------- */
.page-contact .split {
  display: grid;
  gap: clamp(22px, 3.4vw, 56px);
  grid-template-columns: 1fr;
}

.page-contact .split__title {
  margin: clamp(8px, 1.2vh, 14px) 0 0;
  font-size: var(--contact-sub);
  line-height: 1.24;
  color: var(--text);
}

.page-contact .split__lede {
  margin: clamp(10px, 1.6vh, 16px) 0 0;
  font-size: 15px;
  line-height: 1.75;
}

@media (min-width: 900px) {
  .page-contact .split {
    grid-template-columns: 38fr 62fr;
    align-items: start;
  }

  .page-contact .split--reverse {
    grid-template-columns: 38fr 62fr;
  }

  .page-contact .split__aside {
    position: sticky;
    top: calc(var(--header-h) + 28px);
  }
}

/* ---------- 三类问题 ---------- */
.page-contact .reason-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
}

.page-contact .reason {
  display: flex;
  gap: clamp(12px, 1.6vw, 22px);
  padding: clamp(16px, 2.2vh, 26px) 0;
  border-top: 1px solid var(--grid);
}

.page-contact .reason:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-contact .reason__no {
  flex: none;
  font-size: 13px;
  letter-spacing: 0.16em;
  color: var(--volt);
  padding-top: 4px;
}

.page-contact .reason__main h3 {
  margin: 0 0 8px;
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.42;
  color: var(--text);
}

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

/* ---------- 处理路径 ---------- */
.page-contact .path-figure {
  margin: 0 0 clamp(22px, 3.2vh, 40px);
}

.page-contact .path {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: clamp(16px, 2vw, 26px);
  grid-template-columns: 1fr;
}

.page-contact .path__node {
  position: relative;
  padding: clamp(16px, 2.2vh, 24px) 0 0;
  border-top: 1px solid var(--grid);
  transition: border-color var(--t-fast);
}

.page-contact .path__node::before {
  content: "";
  position: absolute;
  top: -5px;
  left: 0;
  width: 9px;
  height: 9px;
  background: var(--volt);
  transition: background-color var(--t-fast), transform var(--t-fast);
}

.page-contact .path__node:hover,
.page-contact .path__node:focus-within {
  border-top-color: var(--volt);
}

.page-contact .path__node:hover::before {
  background: var(--amber);
  transform: scale(1.25);
}

.page-contact .path__no {
  display: block;
  font-size: 12px;
  letter-spacing: 0.18em;
  color: var(--muted);
}

.page-contact .path__name {
  margin: 10px 0 8px;
  font-size: clamp(18px, 1.7vw, 22px);
  color: var(--text);
}

.page-contact .path__note {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--muted);
  transition: color var(--t-fast);
}

.page-contact .path__node:hover .path__note {
  color: var(--text);
}

@media (min-width: 820px) {
  .page-contact .path {
    grid-template-columns: repeat(3, 1fr);
    column-gap: clamp(20px, 3vw, 46px);
  }
}

/* ---------- 附上什么 ---------- */
.page-contact .attach-list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 0;
  grid-template-columns: 1fr;
}

.page-contact .attach {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: clamp(13px, 1.9vh, 20px) 0;
  border-top: 1px solid var(--grid);
}

.page-contact .attach:last-child {
  border-bottom: 1px solid var(--grid);
}

.page-contact .attach__key {
  font-size: 12px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--volt);
}

.page-contact .attach__val {
  font-size: 15px;
  line-height: 1.72;
  color: var(--muted);
}

@media (min-width: 640px) {
  .page-contact .attach {
    flex-direction: row;
    align-items: baseline;
    gap: clamp(12px, 1.6vw, 22px);
  }

  .page-contact .attach__key {
    flex: none;
    width: 72px;
  }
}

/* ---------- 合作 ---------- */
.page-contact .cooperate-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: var(--contact-pad);
  border: 1px solid var(--grid);
  background: var(--panel);
  transition: border-color var(--t-fast), transform var(--t-fast), background-color var(--t-fast);
}

.page-contact .cooperate-card:hover,
.page-contact .cooperate-card:focus-within {
  border-color: var(--volt);
  transform: translateY(-2px);
  background-color: #14204a;
}

.page-contact .cooperate-card h3 {
  margin: 0;
  font-size: clamp(17px, 1.5vw, 20px);
  line-height: 1.42;
  color: var(--text);
}

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

.page-contact .cooperate-links {
  margin: clamp(20px, 3vh, 34px) 0 0;
  max-width: 72ch;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
}

.page-contact .cooperate-links .link-more {
  margin: 0 2px;
}

/* ---------- 备案与服务区域 ---------- */
.page-contact .register-section {
  border-top: 1px solid var(--grid);
}

.page-contact .register-inner {
  display: grid;
  gap: clamp(22px, 3.2vw, 48px);
  grid-template-columns: 1fr;
}

.page-contact .register-block h2 {
  margin: clamp(8px, 1.2vh, 14px) 0 0;
  font-size: var(--contact-sub);
  line-height: 1.24;
  color: var(--text);
}

.page-contact .register-block p {
  margin: clamp(10px, 1.6vh, 16px) 0 0;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--muted);
}

.page-contact .register-meta {
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--grid);
}

.page-contact .register-row {
  display: flex;
  flex-wrap: wrap;
  gap: 8px clamp(14px, 2vw, 28px);
  padding: clamp(12px, 1.8vh, 18px) 0;
  border-bottom: 1px solid var(--grid);
}

.page-contact .register-row dt {
  flex: none;
  min-width: 76px;
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

.page-contact .register-row dd {
  margin: 0;
  font-size: 14.5px;
  color: var(--text);
  word-break: break-all;
}

@media (min-width: 900px) {
  .page-contact .register-inner {
    grid-template-columns: 1fr 1.1fr;
    align-items: start;
  }

  .page-contact .register-meta {
    border-top-color: transparent;
  }

  .page-contact .register-row:first-child {
    padding-top: 0;
  }
}

/* ---------- 窄屏兜底 ---------- */
@media (max-width: 480px) {
  .page-contact .contact-hero__title {
    max-width: none;
  }

  .page-contact .reason {
    flex-direction: column;
    gap: 8px;
  }

  .page-contact .reason__no {
    padding-top: 0;
  }

  .page-contact .contact-card__value {
    font-size: 16px;
  }
}
</main>