.page-contact {
  --contact-gap: clamp(34px, 5vw, 72px);
  --mega-size: clamp(1.05rem, 1.6vw + 0.5rem, 1.6rem);
  display: block;
  background: var(--c-night);
  color: var(--ink);
  font-family: var(--font-body);
}

/* ---------- 面包屑 ---------- */
.page-contact .contact-crumb {
  padding-top: 26px;
}
.page-contact .contact-crumb .breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
}
.page-contact .contact-crumb .breadcrumb a {
  color: var(--ink-mute);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.page-contact .contact-crumb .breadcrumb a:hover {
  color: var(--c-mist);
  border-bottom-color: var(--hair-strong);
}
.page-contact .crumb-sep {
  color: var(--hair-strong);
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(34px, 5.5vw, 70px) clamp(44px, 6.5vw, 92px);
  border-bottom: 1px solid var(--hair);
}
.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.page-contact .contact-hero__bg img {
  display: block;
  width: 100%;
  height: 100%;
  max-width: 100%;
  object-fit: cover;
  opacity: 0.42;
}
.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    linear-gradient(160deg, rgba(7, 11, 26, 0.5) 0%, rgba(7, 11, 26, 0.9) 58%, var(--c-night) 100%);
  pointer-events: none;
}
.page-contact .contact-hero__inner {
  position: relative;
  z-index: 2;
  max-width: 820px;
}
.page-contact .contact-hero__inner .eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--c-mist);
  margin: 0;
}
.page-contact h1 {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(1.95rem, 4.4vw, 3.3rem);
  line-height: 1.2;
  letter-spacing: -0.01em;
  margin: 16px 0 18px;
  color: var(--c-flag-white);
}
.page-contact .lede {
  font-size: clamp(1rem, 1.1vw + 0.7rem, 1.12rem);
  line-height: 1.9;
  color: var(--ink-dim);
  margin: 0;
  max-width: 68ch;
}
.page-contact .lede a {
  color: var(--c-mist);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-strong);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.page-contact .lede a:hover {
  color: var(--c-flag-white);
  border-bottom-color: var(--c-flag-blue);
}
.page-contact .contact-hero__chips {
  list-style: none;
  margin: 26px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

/* ---------- 主分栏 ---------- */
.page-contact .contact-main {
  padding-block: clamp(46px, 6.5vw, 94px);
}
.page-contact .contact-main__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: var(--contact-gap);
}

/* 左栏：联系通道 */
.page-contact .contact-lines {
  display: grid;
  gap: 16px;
  align-content: start;
}
.page-contact .contact-lines__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 2.2vw, 1.75rem);
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--c-flag-white);
}
.page-contact .contact-lines__intro {
  margin: 0 0 6px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-mute);
}
.page-contact .line-card {
  position: relative;
  overflow: hidden;
  padding: clamp(20px, 2.6vw, 30px);
  border-radius: var(--r-lg);
  border: 1px solid var(--hair);
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(58, 114, 248, 0.16) 0%, rgba(16, 26, 56, 0.92) 46%, rgba(7, 11, 26, 0.96) 100%);
}
.page-contact .line-card--phone {
  background:
    radial-gradient(120% 140% at 0% 0%, rgba(127, 211, 224, 0.14) 0%, rgba(16, 26, 56, 0.92) 48%, rgba(7, 11, 26, 0.96) 100%);
}
.page-contact .line-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 22%;
  bottom: 22%;
  width: 3px;
  border-radius: 0 3px 3px 0;
  background: linear-gradient(180deg, var(--c-flag-blue), var(--c-nebula));
}
.page-contact .line-card--phone::before {
  background: linear-gradient(180deg, var(--c-mist), var(--c-flag-blue));
}
.page-contact .line-card__label {
  margin: 0;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--ink-mute);
  font-family: var(--font-mono);
}
.page-contact .line-card__value {
  font-family: var(--font-mono);
  font-size: var(--mega-size);
  font-weight: 600;
  letter-spacing: 0.01em;
  line-height: 1.35;
  color: var(--c-flag-white);
  margin: 10px 0 18px;
  overflow-wrap: anywhere;
  word-break: break-word;
}
.page-contact .line-card__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
}
.page-contact .line-card__note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
  flex: 1 1 180px;
}
.page-contact .contact-lines [data-copy].is-copied {
  border-color: var(--c-flag-green);
  color: var(--c-flag-green);
}
.page-contact .contact-lines [data-copy].is-copied .copy-btn__label::after {
  content: " ✓";
}
.page-contact .contact-lines__addr {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
  align-items: baseline;
  margin: 8px 0 0;
  padding: 14px 18px;
  border-radius: var(--r-md);
  border: 1px dashed var(--hair-strong);
  font-size: 14.5px;
}
.page-contact .contact-lines__addr-key {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--c-mist);
}
.page-contact .contact-lines__addr-val {
  color: var(--ink-dim);
}

/* 右栏：说明区块 */
.page-contact .contact-side {
  display: grid;
  gap: clamp(30px, 4vw, 48px);
  align-content: start;
}
.page-contact .side-block {
  padding-top: 24px;
  border-top: 1px solid var(--hair);
}
.page-contact .side-block:first-child {
  padding-top: 0;
  border-top: 0;
}
.page-contact .side-block__title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.2rem, 1.9vw, 1.55rem);
  letter-spacing: -0.01em;
  line-height: 1.4;
  margin: 0 0 16px;
  color: var(--c-flag-white);
}
.page-contact .side-block .media-figure {
  margin: 0 0 22px;
}
.page-contact .side-block .media-frame {
  border-radius: var(--r-md);
  border: 1px solid var(--hair);
  overflow: hidden;
}
.page-contact .side-block .media-frame img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  object-fit: cover;
}
.page-contact .side-block figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
}

/* 响应要点 */
.page-contact .check-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 14px;
}
.page-contact .check-list li {
  position: relative;
  padding-left: 30px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-dim);
}
.page-contact .check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  border: 1px solid var(--hair-strong);
  background: rgba(35, 160, 106, 0.3);
}
.page-contact .check-list strong {
  color: var(--c-flag-white);
  font-weight: 600;
}

/* 咨询场景 */
.page-contact .topic-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
}
.page-contact .topic-list li {
  position: relative;
  padding-left: 22px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-dim);
}
.page-contact .topic-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--c-flag-blue);
  box-shadow: 0 0 0 4px rgba(58, 114, 248, 0.16);
}
.page-contact .topic-list li:nth-child(2)::before {
  background: var(--c-mist);
  box-shadow: 0 0 0 4px rgba(127, 211, 224, 0.16);
}
.page-contact .topic-list li:nth-child(3)::before {
  background: var(--c-flag-green);
  box-shadow: 0 0 0 4px rgba(35, 160, 106, 0.16);
}
.page-contact .topic-list li:nth-child(4)::before {
  background: var(--c-flag-yellow);
  box-shadow: 0 0 0 4px rgba(242, 178, 51, 0.16);
}
.page-contact .topic-list li:nth-child(5)::before {
  background: var(--c-nebula);
  box-shadow: 0 0 0 4px rgba(108, 92, 224, 0.18);
}
.page-contact .topic-list strong {
  display: block;
  color: var(--c-flag-white);
  font-weight: 600;
  margin-bottom: 2px;
}

/* 反馈清单 */
.page-contact .feedback-list {
  counter-reset: fb;
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.page-contact .feedback-list li {
  counter-increment: fb;
  position: relative;
  padding: 13px 18px 13px 48px;
  border-radius: var(--r-sm);
  border: 1px solid var(--hair);
  background: rgba(16, 26, 56, 0.62);
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-dim);
}
.page-contact .feedback-list li::before {
  content: "0" counter(fb);
  position: absolute;
  left: 16px;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--c-mist);
}
.page-contact .feedback-list a {
  color: var(--c-flag-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-strong);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.page-contact .feedback-list a:hover {
  color: var(--c-mist);
  border-bottom-color: var(--c-mist);
}

/* 身份与备案 */
.page-contact .identity-grid {
  margin: 0;
  display: grid;
  gap: 0;
}
.page-contact .identity-grid > div {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 20px;
  justify-content: space-between;
  align-items: baseline;
  padding: 13px 0;
  border-bottom: 1px solid var(--hair);
}
.page-contact .identity-grid > div:first-child {
  border-top: 1px solid var(--hair);
}
.page-contact .identity-grid dt {
  font-size: 13.5px;
  color: var(--ink-mute);
  flex: 0 0 auto;
}
.page-contact .identity-grid dd {
  margin: 0;
  flex: 1 1 220px;
  text-align: right;
  font-size: 14.5px;
  line-height: 1.7;
  color: var(--ink);
}
.page-contact .identity-grid dd.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}
.page-contact .identity-grid dd a {
  color: var(--c-flag-blue);
  text-decoration: none;
  border-bottom: 1px solid var(--hair-strong);
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}
.page-contact .identity-grid dd a:hover {
  color: var(--c-mist);
  border-bottom-color: var(--c-mist);
}

/* ---------- 通栏状态条 ---------- */
.page-contact .contact-band {
  margin-top: clamp(38px, 5vw, 72px);
  border-top: 1px solid var(--hair-strong);
  background: linear-gradient(90deg, rgba(58, 114, 248, 0.2) 0%, rgba(108, 92, 224, 0.14) 52%, rgba(127, 211, 224, 0.1) 100%);
}
.page-contact .contact-band__inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
  padding-block: 20px;
  font-size: 13px;
  color: var(--ink-mute);
}
.page-contact .contact-band__brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  letter-spacing: -0.01em;
  color: var(--c-flag-white);
}
.page-contact .contact-band__sep {
  width: 26px;
  height: 3px;
  border-radius: var(--r-pill);
  background: linear-gradient(90deg, var(--c-flag-blue), var(--c-flag-yellow), var(--c-flag-green));
}
.page-contact .contact-band__inner .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}
.page-contact .contact-band__coord {
  color: var(--c-mist);
  margin-left: auto;
}

/* ---------- 平板与桌面 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-hero__chips {
    gap: 12px;
  }
  .page-contact .feedback-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
  .page-contact .feedback-list li {
    padding-right: 16px;
  }
}

@media (min-width: 1000px) {
  .page-contact .contact-main__grid {
    grid-template-columns: minmax(0, 5fr) minmax(0, 6.4fr);
  }
  .page-contact .contact-lines {
    position: sticky;
    top: 104px;
  }
  .page-contact .contact-hero__inner {
    max-width: 860px;
  }
}

@media (max-width: 420px) {
  .page-contact .line-card__value {
    font-size: 1rem;
    letter-spacing: 0;
  }
  .page-contact .line-card__foot {
    flex-direction: column;
    align-items: flex-start;
  }
  .page-contact .identity-grid dd {
    text-align: left;
    flex-basis: 100%;
  }
  .page-contact .contact-band__coord {
    margin-left: 0;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-crumb .breadcrumb a,
  .page-contact .lede a,
  .page-contact .feedback-list a,
  .page-contact .identity-grid dd a {
    transition: none;
  }
}