.page-contact {
  --contact-line: 1px solid var(--ink-700);
  background: var(--ink-900);
  color: var(--paper-light);
  font-family: var(--font-sans);
}

.page-contact .contact-shell {
  width: 100%;
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 88px;
}

.page-contact .contact-shell > * {
  min-width: 0;
}

/* 面包屑 */
.page-contact .contact-crumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--mist);
}

.page-contact .contact-crumb a {
  color: var(--mist);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .contact-crumb a:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

.page-contact .contact-crumb__sep {
  color: var(--ink-700);
}

.page-contact .contact-crumb [aria-current="page"] {
  color: var(--tiger);
}

/* 首屏 */
.page-contact .contact-hero {
  position: relative;
  margin-top: 26px;
  padding-bottom: 30px;
  border-bottom: var(--contact-line);
  overflow: hidden;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  top: -120px;
  right: -80px;
  width: 340px;
  height: 340px;
  background: radial-gradient(circle, rgba(47, 227, 196, 0.16), rgba(47, 227, 196, 0) 68%);
  pointer-events: none;
  z-index: 0;
}

.page-contact .contact-hero > * {
  position: relative;
  z-index: 1;
}

.page-contact .contact-hero__eyebrow {
  margin: 0 0 14px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--tiger);
}

.page-contact .contact-hero__title {
  margin: 0 0 18px;
  font-size: clamp(28px, 6.2vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
  font-weight: 900;
  color: var(--paper-light);
  max-width: 18em;
}

.page-contact .contact-hero__lead {
  margin: 0;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 40em;
}

/* 通用小节标题 */
.page-contact .num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--tiger);
  font-weight: 500;
}

.page-contact .contact-h2 {
  margin: 0;
  font-size: clamp(21px, 3.6vw, 30px);
  line-height: 1.28;
  font-weight: 800;
  color: var(--paper-light);
}

/* 双栏通道 */
.page-contact .contact-split {
  margin-top: 44px;
}

.page-contact .contact-split__head {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  margin-bottom: 22px;
}

.page-contact .contact-split__sub {
  margin: 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .contact-split__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
}

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

.page-contact .contact-split__main {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-top: 26px;
  padding-top: 26px;
  border-top: var(--contact-line);
}

.page-contact .contact-line {
  padding: 20px 0 22px;
  border-top: var(--contact-line);
}

.page-contact .contact-line:last-child {
  border-bottom: var(--contact-line);
}

.page-contact .contact-line__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--tiger);
}

.page-contact .contact-line__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(22px, 5vw, 28px);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -0.01em;
  color: var(--paper-light);
  overflow-wrap: anywhere;
}

.page-contact .contact-line__value--mail {
  font-size: clamp(15px, 3.6vw, 20px);
  word-break: break-all;
}

.page-contact .contact-line__foot {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}

.page-contact .contact-line__hint {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.page-contact .contact-line__note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--mist);
}

/* 首屏图片 */
.page-contact .contact-media {
  margin: 0;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  overflow: hidden;
}

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

/* 留言模板 */
.page-contact .draft {
  position: relative;
  padding: 22px 18px 20px;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
}

.page-contact .draft__tag {
  position: absolute;
  top: 0;
  right: 0;
  padding: 4px 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--ink-900);
  background: var(--gold);
}

.page-contact .draft__title {
  margin: 0 0 6px;
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--paper-light);
}

.page-contact .draft__hint {
  margin: 0 0 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--mist);
}

.page-contact .draft__body {
  padding: 14px 14px 12px;
  background: var(--ink-900);
  border-left: 2px solid var(--tiger);
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--paper-light);
  overflow-wrap: anywhere;
}

.page-contact .draft__body p {
  margin: 0 0 6px;
}

.page-contact .draft__body p:last-child {
  margin-bottom: 0;
}

.page-contact .draft__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}

.page-contact .draft__tip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--mist);
}

/* 通用区块 */
.page-contact .contact-block {
  margin-top: 54px;
  padding-top: 30px;
  border-top: var(--contact-line);
}

.page-contact .contact-block__head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.page-contact .contact-block__lead {
  margin: 0 0 22px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--mist);
  max-width: 38em;
}

.page-contact .contact-note {
  margin: 22px 0 0;
  padding-left: 14px;
  border-left: 2px solid var(--ink-700);
  font-size: 14px;
  line-height: 1.85;
  color: var(--mist);
}

.page-contact .contact-note a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 140, 255, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .contact-note a:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

/* 三类反馈 */
.page-contact .issue-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .issue {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 14px;
  padding: 22px 0;
  border-top: var(--contact-line);
}

.page-contact .issue:last-child {
  border-bottom: var(--contact-line);
}

.page-contact .issue__num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--tiger);
  color: var(--tiger);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
}

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

.page-contact .issue__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper-light);
}

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

.page-contact .issue__ask {
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
}

.page-contact .issue__ask li {
  padding: 4px 10px;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.04em;
  color: var(--mist);
}

.page-contact .contact-figure {
  margin: 28px 0 0;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
  overflow: hidden;
}

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

.page-contact .contact-figure figcaption {
  padding: 10px 14px;
  border-top: 1px solid var(--ink-700);
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.05em;
  line-height: 1.7;
  color: var(--mist);
}

/* 咨询与合作 */
.page-contact .topic-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.page-contact .topic {
  padding: 20px 0;
  border-top: var(--contact-line);
}

.page-contact .topic-k,
.page-contact .topic__k {
  display: inline-block;
  margin-bottom: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--teal);
}

.page-contact .topic__title {
  margin: 0 0 8px;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--paper-light);
}

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

/* 邮件通道 */
.page-contact .mailbar {
  display: grid;
  grid-template-columns: 1fr;
  gap: 22px;
  padding: 22px 18px;
  border: 1px solid var(--ink-700);
  background: var(--ink-800);
}

.page-contact .mailbar__main {
  min-width: 0;
  padding-left: 14px;
  border-left: 2px solid var(--blue);
}

.page-contact .mailbar__label {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: var(--tiger);
}

.page-contact .mailbar__value {
  margin: 0;
  font-family: var(--font-mono);
  font-size: clamp(15px, 3.4vw, 22px);
  font-weight: 700;
  line-height: 1.3;
  color: var(--paper-light);
  word-break: break-all;
}

.page-contact .mailbar__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 14px;
}

.page-contact .mailbar__tip {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--teal);
}

.page-contact .mailbar__list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .mailbar__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--mist);
}

.page-contact .mailbar__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 6px;
  height: 6px;
  background: var(--ember);
}

/* 地址纸卡 */
.page-contact .paper-card {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 20px;
  background: var(--paper);
  color: var(--paper-ink);
  border-left: 6px solid var(--tiger);
}

.page-contact .paper-card__body {
  min-width: 0;
  flex: 1 1 260px;
}

.page-contact .paper-card__label {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.1em;
  color: #8a5a1f;
}

.page-contact .paper-card__addr {
  margin: 0;
  font-size: clamp(18px, 3.4vw, 24px);
  font-weight: 800;
  line-height: 1.5;
  color: var(--paper-ink);
  overflow-wrap: anywhere;
}

.page-contact .paper-card__note {
  margin: 12px 0 0;
  font-size: 14px;
  line-height: 1.8;
  color: #4a5158;
}

.page-contact .paper-card__copy {
  flex: 0 0 auto;
  padding: 9px 16px;
  border: 1px solid var(--paper-ink);
  background: transparent;
  color: var(--paper-ink);
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  border-radius: 0;
  cursor: pointer;
  transition: background var(--dur) var(--ease), color var(--dur) var(--ease);
}

.page-contact .paper-card__copy:hover {
  background: var(--paper-ink);
  color: var(--paper);
}

/* 备案信息 */
.page-contact .site-facts {
  margin: 0;
  border-top: var(--contact-line);
}

.page-contact .site-facts__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 0;
  border-bottom: var(--contact-line);
}

.page-contact .site-facts__row dt {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: 0.1em;
  color: var(--mist);
}

.page-contact .site-facts__row dd {
  margin: 0;
  font-size: 15px;
  line-height: 1.7;
  color: var(--paper-light);
  overflow-wrap: anywhere;
}

.page-contact .site-facts__row .mono {
  font-family: var(--font-mono);
  letter-spacing: 0.06em;
  color: var(--gold);
}

.page-contact .site-facts__row a {
  color: var(--blue);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 140, 255, 0.45);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .site-facts__row a:hover {
  color: var(--ember);
  border-bottom-color: var(--ember);
}

/* 桌面布局 */
@media (min-width: 860px) {
  .page-contact .contact-shell {
    padding: 48px 40px 110px;
  }

  .page-contact .contact-split__head {
    grid-template-columns: auto minmax(0, 1fr);
    align-items: baseline;
    column-gap: 16px;
  }

  .page-contact .contact-split__head .num {
    grid-row: 1;
  }

  .page-contact .contact-split__head .contact-h2 {
    grid-row: 1;
    grid-column: 2;
  }

  .page-contact .contact-split__sub {
    grid-column: 2;
  }

  .page-contact .contact-split__grid {
    grid-template-columns: 5fr 7fr;
  }

  .page-contact .contact-split__aside {
    padding-right: 36px;
  }

  .page-contact .contact-split__main {
    margin-top: 0;
    padding-top: 0;
    padding-left: 36px;
    border-top: 0;
    border-left: var(--contact-line);
  }

  .page-contact .contact-block {
    margin-top: 68px;
    padding-top: 36px;
  }

  .page-contact .topic-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 48px;
  }

  .page-contact .topic:nth-child(2n) {
    padding-left: 0;
  }

  .page-contact .mailbar {
    grid-template-columns: 5fr 7fr;
    align-items: start;
    gap: 32px;
    padding: 26px 26px;
  }

  .page-contact .site-facts__row {
    grid-template-columns: 120px minmax(0, 1fr);
    align-items: baseline;
    gap: 20px;
  }

  .page-contact .paper-card {
    padding: 30px 28px;
    align-items: center;
  }
}

@media (min-width: 1080px) {
  .page-contact .contact-hero__lead {
    max-width: 36em;
  }

  .page-contact .contact-block__lead {
    max-width: 34em;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact *,
  .page-contact *::before,
  .page-contact *::after {
    transition-duration: 1ms !important;
    animation-duration: 1ms !important;
  }
}