.page-contact {
  --pc-line: 1px solid var(--line-600);
  --pc-space: clamp(40px, 7vw, 90px);
  display: block;
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  padding-top: clamp(20px, 3vw, 34px);
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--ink-400);
}

.page-contact .breadcrumb-link {
  color: var(--ink-400);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color 200ms var(--ease), border-color 200ms var(--ease);
}

.page-contact .breadcrumb-link:hover {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-contact .breadcrumb-sep {
  color: var(--line-600);
}

.page-contact .breadcrumb-current {
  color: var(--ink-100);
  letter-spacing: 0.1em;
}

/* ---------- 内联链接 ---------- */
.page-contact .contact-link {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(47, 227, 212, 0.35);
  transition: border-color 200ms var(--ease), color 200ms var(--ease);
}

.page-contact .contact-link:hover {
  border-bottom-color: var(--cyan-400);
}

.page-contact .contact-link:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 3px;
}

/* ---------- 首屏 ---------- */
.page-contact .contact-hero {
  position: relative;
  padding-bottom: 0;
}

.page-contact .contact-hero .wrap {
  padding-top: clamp(26px, 5vw, 58px);
}

.page-contact .contact-hero .display-title {
  overflow-wrap: anywhere;
  margin-bottom: clamp(18px, 2.6vw, 28px);
}

.page-contact .contact-hero__lede {
  max-width: 60ch;
  font-size: clamp(16px, 1.7vw, 19px);
  line-height: 1.8;
  color: var(--ink-100);
}

.page-contact .contact-hero__facts {
  display: flex;
  flex-wrap: wrap;
  gap: clamp(16px, 3.4vw, 52px);
  margin: clamp(24px, 4vw, 42px) 0 0;
  padding: clamp(16px, 2.6vw, 24px) 0 0;
  list-style: none;
  border-top: var(--pc-line);
}

.page-contact .contact-hero__fact {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 132px;
}

.page-contact .contact-hero__key {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-400);
}

.page-contact .contact-hero__val {
  font-size: clamp(17px, 2vw, 22px);
  font-weight: 300;
  letter-spacing: -0.01em;
  color: var(--ink-100);
}

.page-contact .contact-hero__media {
  margin-top: clamp(30px, 5vw, 62px);
}

.page-contact .contact-hero__media img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: saturate(0.72);
}

/* ---------- 事项分类 ---------- */
.page-contact .contact-topics__head {
  margin-bottom: clamp(26px, 4vw, 46px);
}

.page-contact .contact-topic-list {
  display: flex;
  flex-direction: column;
  gap: clamp(12px, 1.6vw, 18px);
}

.page-contact .contact-topic {
  width: 100%;
}

.page-contact .contact-topic__heading {
  margin: 0;
}

.page-contact .contact-topic__trigger {
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-areas:
    "mark name"
    "who who";
  align-items: baseline;
  gap: 6px 14px;
  width: 100%;
  padding: clamp(16px, 2.4vw, 24px) clamp(16px, 2.6vw, 30px);
  background: var(--deepspace-600);
  border: var(--pc-line);
  color: var(--ink-100);
  text-align: left;
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  transition: border-color 240ms var(--ease), background 240ms var(--ease);
}

.page-contact .contact-topic__trigger .accordion-mark {
  grid-area: mark;
}

.page-contact .contact-topic__name {
  grid-area: name;
  font-size: clamp(18px, 2.2vw, 26px);
  font-weight: 500;
  letter-spacing: -0.01em;
  color: var(--ink-100);
}

.page-contact .contact-topic__who {
  grid-area: who;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--ink-400);
}

.page-contact .contact-topic__trigger:hover {
  border-color: var(--nebula-300);
  background: #172046;
}

.page-contact .contact-topic__trigger:focus-visible {
  outline: 2px solid var(--cyan-400);
  outline-offset: 2px;
}

.page-contact .contact-topic__trigger[aria-expanded="true"] {
  border-color: rgba(47, 227, 212, 0.6);
  background: #121a3c;
}

.page-contact .contact-topic__panel {
  padding: clamp(16px, 2.4vw, 26px) clamp(16px, 2.6vw, 30px) clamp(20px, 2.8vw, 30px);
  background: rgba(10, 15, 36, 0.72);
  border: var(--pc-line);
  border-top: 0;
}

.page-contact .contact-topic__panel p {
  margin: 0 0 14px;
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-100);
}

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

.page-contact .contact-needs li {
  position: relative;
  padding-left: 22px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--ink-400);
}

.page-contact .contact-needs li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.78em;
  width: 11px;
  height: 1px;
  background: var(--cyan-400);
}

.page-contact .contact-topic__more {
  margin: 16px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-400);
}

/* ---------- 对接流程 ---------- */
.page-contact .contact-process__head {
  margin-bottom: clamp(24px, 3.6vw, 40px);
}

.page-contact .contact-process__visual {
  margin: 0;
}

.page-contact .contact-process__visual img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.6);
  opacity: 0.88;
}

.page-contact .contact-flow {
  display: grid;
  gap: clamp(22px, 3.4vw, 34px);
  margin: clamp(30px, 4.4vw, 52px) 0 0;
  padding: 0;
  list-style: none;
}

.page-contact .contact-flow__item {
  position: relative;
  padding-top: 20px;
  border-top: var(--pc-line);
}

.page-contact .contact-flow__node {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 16px;
  border: 1px solid var(--cyan-400);
  border-radius: 50%;
  color: var(--cyan-400);
  font-family: var(--font-mono);
  font-size: 13px;
  font-variant-numeric: tabular-nums;
  transition: background 240ms var(--ease), box-shadow 240ms var(--ease);
}

.page-contact .contact-flow__item:hover .contact-flow__node {
  background: rgba(47, 227, 212, 0.12);
  box-shadow: 0 0 0 8px rgba(47, 227, 212, 0.06);
}

.page-contact .contact-flow__title {
  margin: 0 0 10px;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 500;
  color: var(--ink-100);
}

.page-contact .contact-flow__item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-400);
}

/* ---------- 联系方式 ---------- */
.page-contact .contact-channels__head {
  margin-bottom: clamp(24px, 3.6vw, 42px);
}

.page-contact .contact-channels__grid {
  display: grid;
  gap: clamp(22px, 3vw, 36px);
}

.page-contact .contact-card {
  padding: clamp(22px, 3vw, 36px);
  background: var(--deepspace-600);
  border: var(--pc-line);
}

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

.page-contact .contact-line {
  display: grid;
  gap: 6px;
}

.page-contact .contact-line__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink-400);
}

.page-contact .contact-line__value {
  font-size: clamp(16px, 1.8vw, 19px);
  line-height: 1.62;
  color: var(--ink-100);
  overflow-wrap: anywhere;
}

.page-contact .contact-line__value--mono {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  letter-spacing: 0.01em;
}

.page-contact .contact-address .contact-line__value {
  font-size: clamp(15px, 1.6vw, 17px);
  color: var(--ink-400);
}

.page-contact .contact-note {
  margin: clamp(20px, 3vw, 28px) 0 0;
  padding-top: clamp(16px, 2.4vw, 22px);
  border-top: var(--pc-line);
  font-size: 14px;
  line-height: 1.78;
  color: var(--ink-400);
}

.page-contact .contact-channels__aside-title {
  margin: 0 0 18px;
  font-size: clamp(17px, 1.9vw, 21px);
  font-weight: 500;
  color: var(--ink-100);
}

.page-contact .contact-route {
  margin: 0;
}

.page-contact .contact-route dt {
  padding-top: 16px;
  border-top: var(--pc-line);
  font-size: 15px;
  font-weight: 500;
  color: var(--ink-100);
}

.page-contact .contact-route dt:first-of-type {
  padding-top: 0;
  border-top: 0;
}

.page-contact .contact-route dd {
  margin: 6px 0 16px;
  font-size: 15px;
  line-height: 1.72;
  color: var(--ink-400);
}

/* ---------- 反馈与纠错 ---------- */
.page-contact .contact-fix__head {
  margin-bottom: clamp(24px, 3.6vw, 42px);
}

.page-contact .contact-fix__grid {
  display: grid;
  gap: clamp(16px, 2.4vw, 24px);
}

.page-contact .contact-fix__card {
  padding: clamp(20px, 2.8vw, 30px);
  background: rgba(10, 15, 36, 0.62);
  border: var(--pc-line);
  transition: border-color 240ms var(--ease);
}

.page-contact .contact-fix__card:hover {
  border-color: var(--nebula-300);
}

.page-contact .contact-fix__card h3 {
  margin: 0 0 10px;
  font-size: 17px;
  font-weight: 500;
  letter-spacing: 0.02em;
  color: var(--cyan-400);
}

.page-contact .contact-fix__card p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--ink-400);
}

.page-contact .contact-fix__more {
  margin: clamp(24px, 3.4vw, 38px) 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-400);
}

/* ---------- 底部负空间 ---------- */
.page-contact .contact-nightfall {
  min-height: 30vh;
  margin-top: clamp(40px, 7vw, 90px);
  background:
    radial-gradient(120% 80% at 50% 100%, rgba(124, 92, 255, 0.16), transparent 65%),
    linear-gradient(180deg, transparent 0%, rgba(4, 6, 14, 0.92) 100%);
}

/* ---------- 断点 ---------- */
@media (min-width: 760px) {
  .page-contact .contact-topic__trigger {
    grid-template-columns: auto 1fr auto;
    grid-template-areas: "mark name who";
    align-items: center;
    gap: 6px clamp(14px, 2vw, 24px);
  }

  .page-contact .contact-topic__who {
    white-space: nowrap;
  }

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

@media (min-width: 900px) {
  .page-contact .contact-channels__grid {
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    align-items: start;
  }

  .page-contact .contact-topic:nth-child(2) {
    width: 89%;
  }

  .page-contact .contact-topic:nth-child(3) {
    width: 78%;
  }

  .page-contact .contact-topic:nth-child(4) {
    width: 67%;
  }

  .page-contact .contact-flow {
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: clamp(20px, 2.4vw, 32px);
  }

  .page-contact .contact-flow__item {
    border-top: 0;
    padding-top: 26px;
  }

  .page-contact .contact-flow__item::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: calc(-1 * clamp(20px, 2.4vw, 32px));
    height: 1px;
    background: linear-gradient(90deg, rgba(47, 227, 212, 0.85), rgba(124, 92, 255, 0.35), transparent);
  }

  .page-contact .contact-flow__item:last-child::before {
    right: 0;
    background: linear-gradient(90deg, rgba(47, 227, 212, 0.85), rgba(124, 92, 255, 0.5));
  }
}

@media (max-width: 480px) {
  .page-contact .contact-hero__facts {
    flex-direction: column;
    gap: 16px;
  }

  .page-contact .contact-topic__trigger {
    padding: 16px 18px;
  }

  .page-contact .contact-card {
    padding: 22px 18px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .contact-flow__node,
  .page-contact .contact-topic__trigger,
  .page-contact .contact-fix__card,
  .page-contact .contact-link {
    transition: none;
  }
}