.page-contact {
  --pc-lead: #BCD0DD;
  --pc-dash: rgba(37, 214, 236, 0.28);
  --pc-accent: var(--cyan);
  background: var(--navy);
  color: var(--ice);
}

.page-contact [id] {
  scroll-margin-top: 120px;
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
  padding-top: clamp(132px, 17vw, 198px);
  padding-bottom: clamp(40px, 7vw, 76px);
  border-bottom: 2px solid var(--grid);
}

.page-contact .contact-hero__bg {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.page-contact .contact-hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center 42%;
  opacity: 0.34;
}

.page-contact .contact-hero__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(7, 20, 31, 0.7) 0%, rgba(7, 20, 31, 0.93) 62%, var(--navy) 100%),
    repeating-linear-gradient(90deg, rgba(37, 214, 236, 0.07) 0 1px, transparent 1px 24px),
    repeating-linear-gradient(0deg, rgba(37, 214, 236, 0.07) 0 1px, transparent 1px 24px);
}

.page-contact .contact-hero__kicker {
  margin: 26px 0 14px;
  font-size: var(--fs-8);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .contact-hero h1 {
  max-width: 22ch;
  margin: 0 0 20px;
  font-size: clamp(32px, 6.4vw, var(--fs-1));
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.02em;
  color: var(--ice);
}

.page-contact .contact-hero__lead {
  max-width: 62ch;
  margin: 0;
  font-size: var(--fs-6);
  line-height: 1.8;
  color: var(--pc-lead);
}

.page-contact .contact-hero__window {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 26px 0 0;
  padding: 10px 16px;
  border: 1px solid var(--grid);
  background: rgba(15, 36, 56, 0.72);
  font-family: var(--mono);
  font-size: var(--fs-8);
  letter-spacing: 0.04em;
  color: var(--ice);
}

.page-contact .contact-hero__window::before {
  content: "";
  width: 8px;
  height: 8px;
  flex: none;
  background: var(--mint);
  box-shadow: 0 0 0 3px rgba(47, 220, 166, 0.18);
}

.page-contact .contact-hero__window b {
  font-weight: 500;
  color: var(--mint);
}

.page-contact .contact-hero__jump {
  display: flex;
  gap: 10px;
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px dashed var(--grid);
  overflow-x: auto;
  scrollbar-width: none;
}

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

.page-contact .contact-hero__jump a {
  flex: none;
  padding: 6px 12px;
  border: 1px solid var(--grid);
  font-size: var(--fs-8);
  letter-spacing: 0.06em;
  color: var(--steel);
  text-decoration: none;
  white-space: nowrap;
  transition: color 0.2s var(--ease), border-color 0.2s var(--ease), background-color 0.2s var(--ease);
}

.page-contact .contact-hero__jump a:hover,
.page-contact .contact-hero__jump a:focus-visible {
  color: var(--navy);
  background: var(--cyan);
  border-color: var(--cyan);
}

/* ---------- 通用章节 ---------- */

.page-contact .contact-section {
  padding: clamp(48px, 7vw, 88px) 0;
}

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

.page-contact .section-head {
  margin-bottom: clamp(26px, 4vw, 44px);
}

.page-contact .section-head__index {
  color: var(--cyan);
  font-size: var(--fs-8);
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.page-contact .section-head__title {
  margin: 10px 0 12px;
  font-size: clamp(24px, 3.6vw, var(--fs-3));
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-contact .section-head__note {
  max-width: 68ch;
  margin: 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--pc-lead);
}

/* ---------- 联系渠道：不等宽错位卡 ---------- */

.page-contact .contact-channels {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-m);
}

.page-contact .channel-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 14px;
  padding: 26px 22px 22px;
  background: var(--board);
  border: 2px solid var(--grid);
  box-shadow: var(--shadow-hard);
}

.page-contact .channel-card::before {
  content: "";
  position: absolute;
  top: -2px;
  left: -2px;
  width: 48px;
  height: 4px;
  background: var(--pc-accent);
}

.page-contact .channel-card--mail { --pc-accent: var(--coral); }
.page-contact .channel-card--phone { --pc-accent: var(--mint); }
.page-contact .channel-card--note { --pc-accent: var(--amber); }

.page-contact .channel-card__code {
  margin: 0;
  font-size: var(--fs-8);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pc-accent);
}

.page-contact .channel-card__title {
  margin: 0;
  font-size: var(--fs-5);
  font-weight: 700;
  color: var(--ice);
}

.page-contact .channel-card__value {
  margin: 0;
  padding: 10px 12px;
  background: var(--board-deep);
  border-left: 3px solid var(--pc-accent);
  font-family: var(--mono);
  font-size: clamp(16px, 1.7vw, 21px);
  font-weight: 600;
  line-height: 1.4;
  color: var(--ice);
  word-break: break-all;
}

.page-contact .channel-card__desc {
  margin: 0;
  font-size: var(--fs-7);
  line-height: 1.75;
  color: var(--pc-lead);
}

.page-contact .channel-card__index {
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--grid);
  font-size: var(--fs-8);
  letter-spacing: 0.03em;
  line-height: 1.6;
  color: var(--steel);
}

.page-contact .channel-card__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: auto 0 0;
  padding-top: 12px;
  border-top: 1px dashed var(--grid);
}

/* ---------- 咨询类型：标签页 ---------- */

.page-contact .ask-wrap {
  padding: clamp(16px, 3vw, 30px);
  background: var(--board);
  border: 2px solid var(--grid);
  box-shadow: var(--shadow-hard);
}

.page-contact .segments__panel {
  outline-offset: 4px;
}

.page-contact .ask-panel {
  padding-top: 4px;
}

.page-contact .ask-panel__lead {
  margin: 0 0 16px;
  font-size: var(--fs-6);
  line-height: 1.7;
  color: var(--ice);
}

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

.page-contact .ask-list__item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 6px;
  padding: 14px 16px;
  background: var(--board-deep);
  border-left: 3px solid var(--cyan);
}

.page-contact .ask-list__key {
  font-family: var(--mono);
  font-size: var(--fs-8);
  letter-spacing: 0.04em;
  color: var(--cyan);
}

.page-contact .ask-list__text {
  font-size: var(--fs-7);
  line-height: 1.75;
  color: var(--pc-lead);
}

.page-contact .ask-panel__foot {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px dashed var(--grid);
  font-size: var(--fs-8);
  line-height: 1.7;
  color: var(--steel);
}

/* ---------- 反馈去向 ---------- */

.page-contact .flow-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--gap-m);
  align-items: start;
  margin-bottom: clamp(28px, 4vw, 52px);
}

.page-contact .flow-intro h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.4vw, var(--fs-3));
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-contact .flow-intro p {
  margin: 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--pc-lead);
}

.page-contact .flow-track {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.page-contact .flow-node {
  position: relative;
}

.page-contact .flow-node details {
  background: var(--board);
  border: 2px solid var(--grid);
  box-shadow: var(--shadow-hard);
  transition: border-color 0.2s var(--ease);
}

.page-contact .flow-node details[open] {
  border-color: var(--cyan);
}

.page-contact .flow-node summary {
  display: grid;
  gap: 8px;
  padding: 16px 18px;
  cursor: pointer;
  list-style: none;
}

.page-contact .flow-node summary::-webkit-details-marker {
  display: none;
}

.page-contact .flow-node summary::marker {
  content: "";
}

.page-contact .flow-node summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

.page-contact .flow-node__num {
  font-family: var(--mono);
  font-size: var(--fs-8);
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .flow-node__title {
  font-size: var(--fs-6);
  font-weight: 700;
  line-height: 1.4;
  color: var(--ice);
}

.page-contact .flow-node__body {
  margin: 0;
  padding: 14px 18px 18px;
  border-top: 1px dashed var(--grid);
  font-size: var(--fs-7);
  line-height: 1.75;
  color: var(--pc-lead);
}

/* ---------- 站点信息 ---------- */

.page-contact .site-facts {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 48px);
  align-items: start;
}

.page-contact .site-facts__head h2 {
  margin: 10px 0 14px;
  font-size: clamp(24px, 3.4vw, var(--fs-3));
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-contact .site-facts__head p {
  margin: 0;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--pc-lead);
}

.page-contact .site-facts__list {
  margin: 0;
  border: 2px solid var(--grid);
  background: var(--board);
  box-shadow: var(--shadow-hard);
}

.page-contact .site-facts__row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 4px;
  padding: 14px 18px;
  border-bottom: 1px dashed var(--grid);
}

.page-contact .site-facts__row:last-child {
  border-bottom: 0;
}

.page-contact .site-facts__row dt {
  font-family: var(--mono);
  font-size: var(--fs-8);
  letter-spacing: 0.06em;
  color: var(--steel);
}

.page-contact .site-facts__row dd {
  margin: 0;
  font-family: var(--mono);
  font-size: var(--fs-6);
  line-height: 1.5;
  color: var(--ice);
  word-break: break-word;
}

/* ---------- 内容合作 ---------- */

.page-contact .coop-panel {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(24px, 4vw, 44px);
  padding: clamp(24px, 4vw, 46px);
  background:
    linear-gradient(145deg, rgba(124, 99, 255, 0.18), rgba(15, 36, 56, 0.92) 58%),
    var(--board);
  border: 2px solid var(--grid);
  box-shadow: var(--shadow-hard);
}

.page-contact .coop-panel__body h2 {
  margin: 10px 0 16px;
  font-size: clamp(24px, 3.4vw, var(--fs-3));
  font-weight: 800;
  line-height: 1.22;
  letter-spacing: -0.01em;
  color: var(--ice);
}

.page-contact .coop-panel__body p {
  max-width: 60ch;
  margin: 0 0 14px;
  font-size: var(--fs-7);
  line-height: 1.8;
  color: var(--pc-lead);
}

.page-contact .coop-panel__note a {
  color: var(--cyan);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.page-contact .coop-panel__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 24px 0 0;
}

.page-contact .coop-stats {
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .coop-stat {
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 16px 18px;
  background: rgba(7, 20, 31, 0.62);
  border: 1px solid var(--grid);
}

.page-contact .coop-stat__num {
  font-family: var(--mono);
  font-size: var(--fs-3);
  font-weight: 700;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .coop-stat__label {
  font-size: var(--fs-8);
  line-height: 1.6;
  color: var(--steel);
}

/* ---------- 中等屏幕 ---------- */

@media (min-width: 720px) {
  .page-contact .ask-list__item {
    grid-template-columns: 132px 1fr;
    align-items: baseline;
    gap: 18px;
  }

  .page-contact .site-facts__row {
    grid-template-columns: 148px 1fr;
    align-items: baseline;
    gap: 22px;
  }
}

/* ---------- 宽屏栅格 ---------- */

@media (min-width: 880px) {
  .page-contact .contact-channels {
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 0 var(--gap-m);
    align-items: start;
  }

  .page-contact .channel-card--mail {
    grid-column: 1 / span 5;
  }

  .page-contact .channel-card--phone {
    grid-column: 6 / span 4;
    margin-top: 44px;
  }

  .page-contact .channel-card--note {
    grid-column: 10 / span 3;
    margin-top: 88px;
  }

  .page-contact .flow-layout {
    grid-template-columns: 5fr 7fr;
    gap: clamp(24px, 4vw, 56px);
  }

  .page-contact .site-facts {
    grid-template-columns: 4fr 8fr;
  }

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

@media (min-width: 780px) {
  .page-contact .flow-track {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0;
    align-items: start;
  }

  .page-contact .flow-node {
    padding-right: 18px;
  }

  .page-contact .flow-node::after {
    content: "";
    position: absolute;
    top: 30px;
    right: 0;
    width: 18px;
    border-top: 2px dashed var(--grid);
  }

  .page-contact .flow-node:last-child {
    padding-right: 0;
  }

  .page-contact .flow-node:last-child::after {
    display: none;
  }
}

/* ---------- 动效降级 ---------- */

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-hero__jump a,
  .page-contact .flow-node details {
    transition: none;
  }
}