.page-contact {
  --pc-radius: var(--r-lg);
  --pc-gap: clamp(14px, 2vw, 20px);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding-top: clamp(26px, 5vw, 48px);
  padding-bottom: clamp(40px, 6vw, 76px);
}

.page-contact .contact-hero .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--steel);
  margin-bottom: clamp(22px, 3.4vw, 38px);
}

.page-contact .contact-hero .breadcrumbs a {
  color: var(--steel);
  text-decoration: none;
}

.page-contact .contact-hero .breadcrumbs a:hover {
  color: var(--cyan);
}

.page-contact .contact-hero__head {
  max-width: 64ch;
}

.page-contact .contact-hero .eyebrow {
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--cyan);
  margin: 0 0 14px;
}

.page-contact .contact-hero h1 {
  margin: 0;
  color: var(--near-white);
}

.page-contact .contact-hero .lede {
  margin: clamp(16px, 2.2vw, 24px) 0 0;
  max-width: 44ch;
  font-size: clamp(16px, 2.2vw, 19px);
  line-height: 1.7;
  color: rgba(247, 250, 255, .78);
}

.page-contact .contact-hero__media {
  margin: clamp(28px, 4.6vw, 52px) 0 0;
  border-radius: var(--pc-radius);
  overflow: hidden;
}

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

/* ---------- 通用章节标题 ---------- */

.page-contact .contact-routes,
.page-contact .contact-lines,
.page-contact .contact-fix,
.page-contact .contact-flow,
.page-contact .contact-more {
  padding-top: clamp(46px, 7vw, 88px);
  padding-bottom: clamp(46px, 7vw, 88px);
}

.page-contact .contact-routes .eyebrow,
.page-contact .contact-fix .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--struct);
  margin: 0 0 12px;
}

.page-contact .contact-lines .eyebrow,
.page-contact .contact-flow .eyebrow {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--cyan);
  margin: 0 0 12px;
}

.page-contact .contact-routes h2,
.page-contact .contact-fix h2 {
  color: var(--ink);
  margin: 0 0 16px;
}

.page-contact .contact-lines h2,
.page-contact .contact-flow h2 {
  color: var(--near-white);
  margin: 0 0 16px;
}

.page-contact .contact-routes .prose,
.page-contact .contact-fix .prose {
  max-width: 42ch;
  color: var(--steel);
  line-height: 1.75;
  margin: 0;
}

.page-contact .contact-lines .prose,
.page-contact .contact-flow .prose {
  max-width: 42ch;
  color: rgba(247, 250, 255, .76);
  line-height: 1.75;
  margin: 0;
}

.page-contact .contact-routes__head {
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-contact .contact-flow__head {
  max-width: 60ch;
  margin-bottom: clamp(30px, 4.4vw, 52px);
}

/* ---------- 三张入口卡 ---------- */

.page-contact .channel-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 22px 22px 26px;
  border: 1px solid var(--line-light);
  border-radius: var(--pc-radius);
  background: #ffffff;
  color: var(--ink);
  font: inherit;
  cursor: pointer;
  overflow: hidden;
  transition: transform .28s var(--ease), border-color .28s var(--ease), box-shadow .28s var(--ease);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: var(--cyan);
  transform: scaleY(0);
  transform-origin: top center;
  transition: transform .3s var(--ease);
}

.page-contact .channel-card:hover,
.page-contact .channel-card:focus-visible {
  transform: translateY(-3px);
  border-color: rgba(51, 225, 210, .6);
  box-shadow: var(--shadow);
  outline: none;
}

.page-contact .channel-card:hover::before,
.page-contact .channel-card:focus-visible::before,
.page-contact .channel-card.is-active::before {
  transform: scaleY(1);
}

.page-contact .channel-card__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .14em;
  color: var(--steel);
}

.page-contact .channel-card__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(21px, 2.6vw, 27px);
  line-height: 1.16;
  letter-spacing: .01em;
}

.page-contact .channel-card__desc {
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

.page-contact .channel-card__cue {
  margin-top: auto;
  padding-top: 16px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .1em;
  color: var(--struct);
}

.page-contact .channel-card--lead {
  background: var(--cobalt);
  border-color: transparent;
  color: var(--near-white);
  padding-bottom: 40px;
}

.page-contact .channel-card--lead .channel-card__no {
  color: var(--cyan);
}

.page-contact .channel-card--lead .channel-card__desc {
  color: rgba(247, 250, 255, .72);
}

.page-contact .channel-card--lead .channel-card__cue {
  color: var(--cyan);
}

.page-contact .channel-card:not(.channel-card--lead).is-active {
  border-color: var(--cyan);
  background: linear-gradient(180deg, #ffffff 0%, rgba(51, 225, 210, .08) 100%);
}

/* ---------- 通道展开面板 ---------- */

.page-contact .channel-panels {
  margin-top: clamp(20px, 3vw, 30px);
  display: grid;
  gap: var(--pc-gap);
}

.page-contact .channel-panel {
  border: 1px solid var(--line-light);
  border-radius: var(--pc-radius);
  background: #ffffff;
  padding: clamp(22px, 3.4vw, 36px);
}

.page-contact .channel-panel[hidden],
.page-contact .channel-panel.is-hidden {
  display: none;
}

.page-contact .channel-panel h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.4vw, 25px);
  color: var(--ink);
}

.page-contact .channel-panel__meta {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .06em;
  color: var(--signal);
}

.page-contact .channel-panel__body p {
  margin: 0 0 14px;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--steel);
}

.page-contact .channel-panel__list {
  list-style: none;
  margin: 0 0 20px;
  padding: 0;
}

.page-contact .channel-panel__list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink);
}

.page-contact .channel-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 9px;
  height: 2px;
  background: var(--cyan);
}

/* ---------- 联系方式 ---------- */

.page-contact .contact-lines__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(26px, 4vw, 48px);
}

.page-contact .contact-lines__hint {
  margin-top: 14px;
  font-size: 14.5px;
}

.page-contact .contact-lines__list {
  list-style: none;
  margin: 0;
  padding: 0;
  background: var(--navy);
  border-radius: var(--pc-radius);
  border: 1px solid var(--line-dark);
  overflow: hidden;
}

.page-contact .contact-line {
  display: grid;
  gap: 6px;
  padding: 20px clamp(18px, 2.6vw, 28px);
}

.page-contact .contact-line + .contact-line {
  border-top: 1px solid var(--line-dark);
}

.page-contact .contact-line__key {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .2em;
  color: var(--cyan);
}

.page-contact .contact-line__val {
  font-family: var(--font-mono);
  font-size: clamp(16px, 2.1vw, 20px);
  line-height: 1.45;
  color: var(--near-white);
  text-decoration: none;
  word-break: break-word;
  transition: color .24s var(--ease);
}

.page-contact a.contact-line__val:hover {
  color: var(--cyan);
}

.page-contact .contact-line__note {
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--steel);
}

/* ---------- 纠错清单 ---------- */

.page-contact .contact-fix__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 3.8vw, 48px);
}

.page-contact .fix-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line-light);
}

.page-contact .fix-list > li {
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 14px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line-light);
}

.page-contact .fix-list__no {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: .08em;
  color: var(--struct);
  padding-top: 3px;
}

.page-contact .fix-list h3 {
  margin: 0 0 5px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.page-contact .fix-list p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: var(--steel);
}

/* ---------- 处理流程 ---------- */

.page-contact .flow-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--pc-gap);
}

.page-contact .flow-step {
  position: relative;
  padding: 22px 22px 24px;
  border-radius: var(--pc-radius);
  background: rgba(247, 250, 255, .045);
  border: 1px solid var(--line-dark);
  outline: none;
  transition: background .28s var(--ease), border-color .28s var(--ease);
}

.page-contact .flow-step:hover,
.page-contact .flow-step:focus-visible {
  background: rgba(51, 225, 210, .07);
  border-color: rgba(51, 225, 210, .45);
}

.page-contact .flow-step__no {
  display: block;
  font-family: var(--font-mono);
  font-size: 12.5px;
  letter-spacing: .18em;
  color: var(--cyan);
  margin-bottom: 10px;
}

.page-contact .flow-step h3 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(19px, 2.2vw, 23px);
  color: var(--near-white);
}

.page-contact .flow-step p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.72;
  color: rgba(247, 250, 255, .7);
}

.page-contact .flow-step__hint {
  margin-top: 10px !important;
  font-size: 13.5px !important;
  color: var(--steel) !important;
}

.page-contact .contact-flow__media {
  margin: clamp(30px, 4.4vw, 52px) 0 0;
  border-radius: var(--pc-radius);
  overflow: hidden;
}

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

/* ---------- 相关页面 ---------- */

.page-contact .contact-more__title {
  margin: 0 0 clamp(20px, 3vw, 30px);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(20px, 2.6vw, 27px);
  color: var(--ink);
}

.page-contact .contact-more__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
}

.page-contact .more-link {
  display: flex;
  flex-direction: column;
  gap: 7px;
  padding: 20px;
  border: 1px solid var(--line-light);
  border-radius: var(--r-md);
  background: #ffffff;
  text-decoration: none;
  color: var(--ink);
  transition: transform .26s var(--ease), border-color .26s var(--ease), box-shadow .26s var(--ease);
}

.page-contact .more-link:hover,
.page-contact .more-link:focus-visible {
  transform: translateY(-3px);
  border-color: var(--cyan);
  box-shadow: var(--shadow);
  outline: none;
}

.page-contact .more-link__label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .18em;
  color: var(--struct);
}

.page-contact .more-link strong {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 19px;
  color: var(--ink);
}

.page-contact .more-link__desc {
  font-size: 13.8px;
  line-height: 1.68;
  color: var(--steel);
}

/* ---------- 平板 ---------- */

@media (min-width: 700px) {

  .page-contact .channel-cards {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    align-items: start;
  }

  .page-contact .channel-card--lead {
    padding-top: 28px;
    padding-bottom: 52px;
  }

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

/* ---------- 桌面 ---------- */

@media (min-width: 900px) {

  .page-contact .channel-cards {
    grid-template-columns: 1.34fr 1fr 1fr;
  }

  .page-contact .channel-panel {
    display: grid;
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.5fr);
    gap: clamp(20px, 3vw, 46px);
    align-items: start;
  }

  .page-contact .channel-panel__head {
    position: sticky;
    top: 96px;
  }

  .page-contact .contact-lines__grid {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.12fr);
    align-items: start;
  }

  .page-contact .contact-fix__grid {
    grid-template-columns: minmax(0, .82fr) minmax(0, 1.5fr);
    align-items: start;
  }

  .page-contact .contact-more__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .flow-steps {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: clamp(20px, 2.6vw, 34px);
  }

  .page-contact .flow-step {
    padding: 44px 0 4px;
    background: transparent;
    border: 0;
  }

  .page-contact .flow-step::before {
    content: "";
    position: absolute;
    top: 12px;
    left: 0;
    right: -34px;
    height: 1px;
    background: var(--line-dark);
  }

  .page-contact .flow-step:last-child::before {
    right: 0;
  }

  .page-contact .flow-step::after {
    content: "";
    position: absolute;
    top: 6px;
    left: 0;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: var(--struct);
    box-shadow: 0 0 0 3px var(--navy);
  }

  .page-contact .flow-step:first-child::after {
    background: var(--signal);
  }

  .page-contact .flow-step:hover,
  .page-contact .flow-step:focus-visible {
    background: transparent;
  }

  .page-contact .flow-step:hover::after,
  .page-contact .flow-step:focus-visible::after {
    background: var(--cyan);
    box-shadow: 0 0 0 3px var(--navy), 0 0 0 6px rgba(51, 225, 210, .22);
  }
}

@media (hover: hover) and (min-width: 900px) {

  .page-contact .flow-step__hint {
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity .24s var(--ease), transform .24s var(--ease);
  }

  .page-contact .flow-step:hover .flow-step__hint,
  .page-contact .flow-step:focus-visible .flow-step__hint,
  .page-contact .flow-step:focus-within .flow-step__hint {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-reduced-motion: reduce) {

  .page-contact .channel-card,
  .page-contact .channel-card::before,
  .page-contact .flow-step,
  .page-contact .flow-step__hint,
  .page-contact .more-link {
    transition: none;
  }
}