.page-contact {
  --contact-sticky-top: 108px;
  --contact-panel-bg: rgba(20, 41, 74, .78);
  --contact-panel-bg-soft: rgba(20, 41, 74, .46);
  display: block;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  padding: clamp(26px, 5.6vw, 58px) 0 clamp(18px, 2.6vw, 28px);
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  z-index: -1;
  top: -70px;
  right: -12%;
  width: min(600px, 72vw);
  height: 300px;
  background: radial-gradient(closest-side, rgba(255, 90, 31, .2), rgba(255, 90, 31, 0) 72%);
  pointer-events: none;
}

.page-contact .contact-hero h1 {
  margin: 12px 0 18px;
  font-size: clamp(32px, 5.8vw, 60px);
  font-weight: 900;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--snow);
  max-width: 20em;
}

.page-contact .contact-hero h1 .hl {
  color: var(--brand-500);
}

.page-contact .contact-hero .lead {
  max-width: 62ch;
}

.page-contact .contact-hero__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 24px;
}

.page-contact .contact-hero__meta span {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  padding: 7px 13px;
  border: var(--frame);
  border-radius: var(--pill);
  color: var(--text-dim);
  background: rgba(20, 41, 74, .5);
}

/* ---------- 主视觉 ---------- */
.page-contact .contact-visual {
  margin: clamp(20px, 3vw, 34px) 0 clamp(34px, 5.4vw, 62px);
  border: var(--frame);
  border-radius: var(--radius-l);
  overflow: hidden;
  background: var(--ink-800);
}

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

/* ---------- 渠道 / 引导 双栏 ---------- */
.page-contact .contact-channels .section__head {
  max-width: 64ch;
}

.page-contact .contact-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(24px, 4vw, 40px);
  margin-top: clamp(22px, 3.4vw, 36px);
}

.page-contact .contact-split__flow > * + * {
  margin-top: clamp(24px, 3.6vw, 40px);
}

/* 渠道卡片 */
.page-contact .channel-card {
  position: relative;
  overflow: hidden;
  background: var(--paper);
  color: var(--on-paper);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-m);
  padding: 20px 24px 18px;
  box-shadow: var(--shadow-soft);
}

.page-contact .channel-card + .channel-card {
  margin-top: clamp(16px, 2.2vw, 24px);
}

.page-contact .channel-card::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 0;
  height: 0;
  border-width: 0 28px 28px 0;
  border-style: solid;
  border-color: transparent var(--brand-500) transparent transparent;
}

.page-contact .channel-card__k {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--on-paper-dim);
  margin-bottom: 8px;
}

.page-contact .channel-card__v {
  display: block;
  font-family: var(--font-mono);
  font-size: clamp(16px, 3.4vw, 21px);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: -0.01em;
  color: var(--on-paper);
  overflow-wrap: anywhere;
}

.page-contact .channel-card__v--brand {
  color: var(--brand-700);
}

.page-contact .channel-card__n {
  margin: 10px 0 0;
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--on-paper-dim);
}

.page-contact .channel-card__n a {
  color: var(--brand-700);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* 引导面板 */
.page-contact .guide-panel {
  border: var(--frame);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, var(--contact-panel-bg), rgba(11, 27, 51, .42));
  padding: clamp(18px, 2.6vw, 26px);
}

.page-contact .guide-panel__title,
.page-contact .reply-block__body h3,
.page-contact .prep-block h3 {
  margin: 10px 0 0;
  font-size: clamp(19px, 2.3vw, 23px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--snow);
}

.page-contact .guide-panel .filter-bar {
  margin-top: 18px;
}

.page-contact .route-list {
  list-style: none;
  margin: 18px 0 0;
  padding: 1px;
  display: grid;
  gap: 1px;
  background: var(--line-700);
  border: 1px solid var(--line-700);
  border-radius: var(--radius-s);
  overflow: hidden;
}

.page-contact .route-item {
  position: relative;
  display: grid;
  gap: 7px;
  background: var(--ink-800);
  padding: 16px 18px 16px 21px;
  transition: background var(--dur-2) var(--ease);
}

.page-contact .route-item[hidden] {
  display: none;
}

.page-contact .route-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--brand-500);
}

.page-contact .route-item:hover {
  background: var(--ink-900);
}

.page-contact .route-item__q {
  margin: 0;
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--snow);
}

.page-contact .route-item__a {
  margin: 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .route-item__a a {
  color: var(--brand-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .route-item__via {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .08em;
  padding: 2px 9px;
  margin-right: 8px;
  border-radius: var(--pill);
  background: rgba(255, 90, 31, .16);
  border: 1px solid rgba(255, 90, 31, .42);
  color: var(--brand-400);
  vertical-align: 1px;
}

.page-contact .route-item__via--green {
  background: rgba(63, 169, 129, .16);
  border-color: rgba(63, 169, 129, .42);
  color: var(--green-500);
}

/* 响应时间 */
.page-contact .reply-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  border: var(--frame);
  border-radius: var(--radius-m);
  overflow: hidden;
  background: var(--ink-800);
}

.page-contact .reply-block__media {
  position: relative;
  min-height: 190px;
  background: var(--ink-900);
}

.page-contact .reply-block__media img {
  display: block;
  width: 100%;
  height: 100%;
  min-height: 190px;
  object-fit: cover;
  max-width: 100%;
}

.page-contact .reply-block__body {
  padding: clamp(18px, 2.6vw, 26px);
}

.page-contact .reply-block__body p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* 准备清单 */
.page-contact .prep-block {
  border-left: 3px solid var(--green-500);
  padding-left: clamp(16px, 2.4vw, 24px);
}

.page-contact .prep-list {
  list-style: none;
  counter-reset: prep;
  margin: 18px 0 0;
  padding: 0;
  display: grid;
  gap: 10px;
}

.page-contact .prep-list li {
  counter-increment: prep;
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
  padding: 13px 16px;
  border: 1px solid var(--line-700);
  border-radius: var(--radius-s);
  background: var(--contact-panel-bg-soft);
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-dim);
}

.page-contact .prep-list li::before {
  content: counter(prep, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--green-500);
  line-height: 1.75;
}

.page-contact .prep-list li a {
  color: var(--brand-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

/* ---------- 合作与内容授权 ---------- */
.page-contact .contact-biz {
  margin-top: clamp(46px, 7.6vw, 96px);
}

.page-contact .contact-biz .section__head {
  max-width: 66ch;
}

.page-contact .contact-biz .section__head a {
  color: var(--brand-400);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .biz-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 26px);
  margin-top: clamp(20px, 3vw, 32px);
}

.page-contact .biz-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: clamp(20px, 2.6vw, 28px);
  border: var(--frame);
  border-radius: var(--radius-m);
  background: linear-gradient(180deg, var(--contact-panel-bg), rgba(11, 27, 51, .55));
  transition: border-color var(--dur-2) var(--ease), transform var(--dur-2) var(--ease);
}

.page-contact .biz-card::before {
  content: "";
  position: absolute;
  top: -1px;
  left: 22px;
  width: 46px;
  height: 3px;
  background: var(--brand-500);
  border-radius: 0 0 3px 3px;
}

.page-contact .biz-card:hover {
  border-color: var(--brand-500);
  transform: translateY(-2px);
}

.page-contact .biz-card__no {
  font-family: var(--font-mono);
  font-size: 11.5px;
  letter-spacing: .14em;
  color: var(--mist);
}

.page-contact .biz-card h3 {
  margin: 0;
  font-size: clamp(18px, 2.1vw, 21px);
  font-weight: 800;
  line-height: 1.35;
  color: var(--snow);
}

.page-contact .biz-card p {
  margin: 0;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

/* ---------- 页底引导 ---------- */
.page-contact .contact-outro {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 18px 32px;
  margin-top: clamp(44px, 7vw, 88px);
  padding: clamp(22px, 3vw, 34px) 0;
  border-top: 1px solid var(--line-700);
  border-bottom: 3px solid var(--brand-500);
}

.page-contact .contact-outro__text {
  flex: 1 1 340px;
  min-width: 0;
}

.page-contact .contact-outro__text h2 {
  margin: 0 0 8px;
  font-size: clamp(20px, 2.4vw, 26px);
  font-weight: 800;
  line-height: 1.3;
  color: var(--snow);
}

.page-contact .contact-outro__text p {
  margin: 0;
  max-width: 58ch;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--text-dim);
}

.page-contact .contact-outro__acts {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* ---------- 响应式 ---------- */
@media (min-width: 640px) {
  .page-contact .reply-block {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.25fr);
  }

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

@media (min-width: 900px) {
  .page-contact .biz-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .page-contact .contact-split {
    grid-template-columns: minmax(300px, 4.3fr) minmax(0, 7fr);
    gap: clamp(28px, 3.4vw, 52px);
    align-items: start;
  }

  .page-contact .contact-split__rail {
    position: sticky;
    top: var(--contact-sticky-top);
  }
}

@media (max-width: 480px) {
  .page-contact .channel-card {
    padding: 18px 18px 16px;
  }

  .page-contact .route-item {
    padding: 14px 15px 14px 18px;
  }

  .page-contact .prep-list li {
    grid-template-columns: 28px minmax(0, 1fr);
    padding: 12px 13px;
  }
}