.page-contact {
  --ct-accent: var(--ab-cyan);
}

/* 面包屑 */
.page-contact .ct-crumb {
  padding-top: clamp(16px, 3vw, 28px);
}

.page-contact .ct-crumb__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: var(--ab-muted);
}

.page-contact .ct-crumb__list li + li::before {
  content: "/";
  margin-right: 10px;
  color: var(--ab-hair-strong);
}

.page-contact .ct-crumb__list a {
  color: var(--ab-muted);
  text-decoration: none;
  transition: color .18s var(--ab-ease);
}

.page-contact .ct-crumb__list a:hover {
  color: var(--ab-lime);
}

.page-contact .ct-crumb__list [aria-current] {
  color: var(--ab-snow);
}

/* 首屏框景 */
.page-contact .ct-hero {
  padding-top: clamp(18px, 3vw, 34px);
}

.page-contact .ct-hero__frame {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 48px);
  padding: clamp(24px, 4.4vw, 54px);
  border: 1px solid var(--ab-hair);
  border-radius: var(--ab-radius-xl);
  background:
    radial-gradient(120% 130% at 88% 4%, rgba(79, 224, 192, .14), transparent 58%),
    radial-gradient(90% 120% at 0% 100%, rgba(198, 255, 61, .1), transparent 62%),
    linear-gradient(168deg, var(--ab-green) 0%, var(--ab-ink) 100%);
  box-shadow: var(--ab-shadow);
  overflow: hidden;
}

.page-contact .ct-hero__frame::before {
  content: "";
  position: absolute;
  top: 16px;
  left: 16px;
  right: 16px;
  height: 8px;
  background-image: repeating-linear-gradient(90deg, var(--ab-hair-strong) 0 1px, transparent 1px 20px);
  opacity: .7;
  pointer-events: none;
}

.page-contact .ct-hero__title {
  margin: 10px 0 0;
  font-size: clamp(34px, 5.8vw, 62px);
}

.page-contact .ct-hero__lead {
  margin: clamp(14px, 2vw, 22px) 0 0;
  max-width: 54ch;
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.82;
  color: var(--ab-snow);
}

.page-contact .ct-hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: clamp(16px, 2.4vw, 26px);
}

.page-contact .ct-hero__media {
  position: relative;
  margin: 0;
  border: 1px solid var(--ab-hair);
  border-radius: var(--ab-radius-lg);
  overflow: hidden;
}

.page-contact .ct-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1200 / 640;
  object-fit: cover;
  filter: saturate(.62) contrast(1.06) brightness(.86);
}

.page-contact .ct-hero__media::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(10, 15, 13, .08), rgba(10, 15, 13, .58)),
    repeating-linear-gradient(90deg, rgba(198, 255, 61, .13) 0 1px, transparent 1px 46px);
  pointer-events: none;
}

/* 双栏骨架 */
.page-contact .ct-board__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(26px, 4vw, 54px);
}

.page-contact .ct-rail {
  padding: clamp(16px, 2vw, 22px);
  border: 1px solid var(--ab-hair);
  border-radius: var(--ab-radius-lg);
  background: linear-gradient(180deg, rgba(28, 58, 49, .72), rgba(10, 15, 13, .55));
}

.page-contact .ct-channels {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-channel {
  padding: 15px 16px 16px;
  border-radius: var(--ab-radius-md);
  background: linear-gradient(180deg, rgba(28, 58, 49, .96), rgba(10, 15, 13, .92));
  box-shadow: inset 3px 0 0 var(--ct-accent, var(--ab-cyan));
}

.page-contact .ct-channel--mail {
  --ct-accent: var(--ab-lime);
}

.page-contact .ct-channel--line {
  --ct-accent: var(--ab-cyan);
}

.page-contact .ct-channel--addr {
  --ct-accent: var(--ab-muted);
}

.page-contact .ct-channel__value {
  margin: 8px 0 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ab-snow);
  overflow-wrap: anywhere;
}

.page-contact .ct-channel__note {
  margin: 8px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ab-muted);
}

.page-contact .ct-scale {
  display: grid;
  gap: 0;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid var(--ab-hair);
}

.page-contact .ct-scale__link {
  position: relative;
  display: block;
  padding: 9px 0 9px 22px;
  font-size: 13px;
  letter-spacing: .02em;
  color: var(--ab-muted);
  text-decoration: none;
  transition: color .18s var(--ab-ease);
}

.page-contact .ct-scale__link::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 50%;
  width: 8px;
  height: 1px;
  background: currentColor;
  transform: translateY(-50%);
  transition: width .18s var(--ab-ease), background .18s var(--ab-ease);
}

.page-contact .ct-scale__link:hover {
  color: var(--ab-snow);
}

.page-contact .ct-scale__link[aria-current] {
  color: var(--ab-lime);
}

.page-contact .ct-scale__link[aria-current]::before {
  width: 14px;
  background: var(--ab-lime);
}

/* 右栏滚动内容与刻度线 */
.page-contact .ct-flow {
  position: relative;
  display: grid;
  gap: clamp(34px, 5.6vw, 72px);
}

.page-contact .ct-block {
  scroll-margin-top: calc(var(--ab-header-h) + 26px);
}

.page-contact .ct-block > h2 {
  margin: 10px 0 0;
  font-size: clamp(23px, 3.1vw, 34px);
  line-height: 1.28;
  letter-spacing: -.01em;
  color: var(--ab-snow);
}

.page-contact .ct-block__lead {
  margin: 14px 0 0;
  max-width: 62ch;
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.82;
  color: var(--ab-muted);
}

/* 问题类型卡片 */
.page-contact .ct-cards {
  display: grid;
  gap: 14px;
  margin-top: clamp(18px, 2.6vw, 28px);
}

.page-contact .ct-card {
  padding: clamp(18px, 2.2vw, 24px);
  border: 1px solid var(--ab-hair);
  border-radius: var(--ab-radius-lg);
  background: linear-gradient(180deg, rgba(28, 58, 49, .92), rgba(10, 15, 13, .86));
  transition: transform .18s var(--ab-ease), border-color .18s var(--ab-ease);
}

.page-contact .ct-card:hover {
  transform: translateY(-2px);
  border-color: var(--ab-hair-strong);
}

.page-contact .ct-card h3 {
  margin: 10px 0 0;
  font-size: clamp(17px, 1.6vw, 20px);
  line-height: 1.42;
  color: var(--ab-snow);
}

.page-contact .ct-card p {
  margin: 10px 0 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ab-muted);
}

.page-contact .ct-card a {
  color: var(--ab-cyan);
  text-decoration: underline;
  text-decoration-color: rgba(79, 224, 192, .42);
  text-underline-offset: 3px;
  transition: color .18s var(--ab-ease);
}

.page-contact .ct-card a:hover {
  color: var(--ab-lime);
}

.page-contact .ct-card__meta {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px 16px;
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--ab-hair);
  font-size: 14px;
}

.page-contact .ct-card__meta dt {
  color: var(--ab-muted);
}

.page-contact .ct-card__meta dd {
  margin: 0;
  color: var(--ab-snow);
  line-height: 1.7;
}

/* 回复时段 */
.page-contact .ct-timeline {
  display: grid;
  gap: 12px;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-timeline > li {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: 6px 18px;
  padding: 16px 18px;
  border-radius: var(--ab-radius-md);
  background: rgba(28, 58, 49, .58);
}

.page-contact .ct-timeline__time {
  font-family: var(--ab-font-mono);
  font-variant-numeric: tabular-nums;
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .02em;
  color: var(--ab-lime);
}

.page-contact .ct-timeline__text {
  font-size: 15px;
  line-height: 1.75;
  color: var(--ab-muted);
}

.page-contact .ct-timeline__text strong {
  color: var(--ab-snow);
  font-weight: 600;
}

/* 合作说明 */
.page-contact .ct-coop__media {
  margin: clamp(20px, 3vw, 32px) 0 0;
  border: 1px solid var(--ab-hair);
  border-radius: var(--ab-radius-lg);
  overflow: hidden;
}

.page-contact .ct-coop__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 1000 / 600;
  object-fit: cover;
  filter: saturate(.6) contrast(1.05) brightness(.85);
}

.page-contact .ct-steps {
  counter-reset: step;
  display: grid;
  gap: 10px;
  margin: clamp(18px, 2.6vw, 28px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-step {
  counter-increment: step;
  border: 1px solid transparent;
  border-radius: var(--ab-radius-md);
  background: rgba(28, 58, 49, .6);
  transition: background .18s var(--ab-ease), border-color .18s var(--ab-ease);
}

.page-contact .ct-step[open] {
  border-color: var(--ab-hair);
  background: rgba(28, 58, 49, .9);
}

.page-contact .ct-step > details > summary {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 15px 18px;
  list-style: none;
  cursor: pointer;
  font-size: 15.5px;
  font-weight: 600;
  color: var(--ab-snow);
}

.page-contact .ct-step > details > summary::-webkit-details-marker {
  display: none;
}

.page-contact .ct-step > details > summary::before {
  content: counter(step, decimal-leading-zero);
  flex: none;
  font-family: var(--ab-font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: .04em;
  color: var(--ab-lime);
}

.page-contact .ct-step > details > summary::after {
  content: "+";
  margin-left: auto;
  font-family: var(--ab-font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--ab-cyan);
}

.page-contact .ct-step > details[open] > summary::after {
  content: "–";
}

.page-contact .ct-step > details > summary:focus-visible {
  outline: 2px solid var(--ab-lime);
  outline-offset: 3px;
  border-radius: var(--ab-radius-md);
}

.page-contact .ct-step__body {
  max-width: 62ch;
  margin: 0;
  padding: 0 18px 18px;
  font-size: 14.5px;
  line-height: 1.78;
  color: var(--ab-muted);
}

.page-contact .ct-prep {
  margin-top: clamp(18px, 2.6vw, 26px);
  padding: clamp(18px, 2.2vw, 24px);
  border-radius: var(--ab-radius-lg);
  background: linear-gradient(180deg, rgba(79, 224, 192, .12), rgba(10, 15, 13, .42));
}

.page-contact .ct-prep ul {
  display: grid;
  gap: 8px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .ct-prep li {
  position: relative;
  padding-left: 18px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ab-snow);
}

.page-contact .ct-prep li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .68em;
  width: 8px;
  height: 1px;
  background: var(--ab-lime);
}

/* 地址与备案 */
.page-contact .ct-office {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(18px, 2.6vw, 28px);
  padding: clamp(20px, 2.6vw, 30px);
  border: 1px solid var(--ab-hair);
  border-radius: var(--ab-radius-lg);
  background: linear-gradient(150deg, rgba(28, 58, 49, .95), rgba(10, 15, 13, .92));
}

.page-contact .ct-office__value {
  margin: 8px 0 0;
  font-size: clamp(15px, 1.1vw, 16.5px);
  line-height: 1.75;
  color: var(--ab-snow);
  overflow-wrap: anywhere;
}

.page-contact .ct-office__value--mono {
  font-family: var(--ab-font-mono);
  font-weight: 700;
  letter-spacing: .02em;
}

.page-contact .ct-office__note {
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.76;
  color: var(--ab-muted);
}

/* 收束刻度线 */
.page-contact .ct-endline {
  height: 1px;
  margin-top: clamp(34px, 5vw, 64px);
  background: linear-gradient(90deg, var(--ab-lime) 0%, var(--ab-cyan) 22%, var(--ab-hair) 60%, transparent 100%);
}

/* 响应式 */
@media (max-width: 979px) {
  .page-contact .ab-sticky {
    position: static;
    top: auto;
  }

  .page-contact .ct-scale {
    display: flex;
    gap: 0;
    overflow-x: auto;
    scrollbar-width: none;
  }

  .page-contact .ct-scale::-webkit-scrollbar {
    display: none;
  }

  .page-contact .ct-scale__link {
    flex: none;
    padding-right: 22px;
    white-space: nowrap;
  }
}

@media (min-width: 620px) {
  .page-contact .ct-card__meta {
    grid-template-columns: 92px minmax(0, 1fr);
  }
}

@media (min-width: 760px) {
  .page-contact .ct-office {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
  }
}

@media (min-width: 900px) {
  .page-contact .ct-hero__frame {
    grid-template-columns: minmax(0, 1.02fr) minmax(0, .98fr);
    align-items: center;
  }
}

@media (min-width: 700px) {
  .page-contact .ct-timeline > li {
    grid-template-columns: 132px minmax(0, 1fr);
    align-items: baseline;
  }
}

@media (min-width: 980px) {
  .page-contact .ct-board__grid {
    grid-template-columns: minmax(250px, 320px) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .ct-flow {
    padding-left: clamp(20px, 2.6vw, 36px);
  }

  .page-contact .ct-flow::before {
    content: "";
    position: absolute;
    left: 0;
    top: 8px;
    bottom: 8px;
    width: 1px;
    background: linear-gradient(180deg, var(--ab-lime) 0%, var(--ab-cyan) 16%, var(--ab-hair) 55%, transparent 100%);
  }
}