.page-contact {
  --contact-line: 1px solid rgba(220, 229, 223, .14);
  --contact-line-strong: 1px solid rgba(220, 229, 223, .28);
  --contact-rail-w: 372px;
  background: var(--pitch-950);
  color: var(--paper-50);
  overflow-x: hidden;
}

.page-contact p {
  margin: 0;
}

/* ---------- 面包屑 ---------- */

.page-contact .contact-crumbs {
  padding: 26px 0 0;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .06em;
  color: var(--slate-600);
}

.page-contact .contact-crumbs a {
  color: var(--slate-600);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

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

.page-contact .contact-crumbs [aria-current="page"] {
  color: var(--paper-200);
}

/* ---------- 首屏 ---------- */

.page-contact .contact-hero {
  position: relative;
  padding: 40px 0 80px;
}

.page-contact .contact-hero::before {
  content: "";
  position: absolute;
  top: -140px;
  right: -160px;
  width: 620px;
  height: 620px;
  background: radial-gradient(circle at center, rgba(59, 240, 206, .13), transparent 66%);
  pointer-events: none;
}

.page-contact .contact-hero::after {
  content: "";
  position: absolute;
  bottom: -40px;
  left: -120px;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle at center, rgba(255, 138, 61, .09), transparent 68%);
  pointer-events: none;
}

.page-contact .contact-hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr;
  gap: 44px;
  align-items: center;
}

.page-contact .contact-hero__copy .eyebrow {
  margin-bottom: 18px;
}

.page-contact .contact-hero h1 {
  font-size: clamp(32px, 8vw, 58px);
  line-height: 1.08;
  letter-spacing: -.015em;
  font-weight: 900;
  margin: 0 0 22px;
  max-width: 17em;
}

.page-contact .contact-hero__lede {
  font-size: 16px;
  line-height: 1.75;
  color: rgba(245, 248, 244, .8);
  max-width: 34em;
}

.page-contact .contact-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.page-contact .contact-hero__facts {
  margin: 38px 0 0;
  padding-top: 26px;
  border-top: var(--contact-line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
}

.page-contact .contact-fact__label {
  font-size: 12px;
  letter-spacing: .08em;
  color: var(--slate-600);
  margin-bottom: 6px;
}

.page-contact .contact-fact__value {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: var(--paper-50);
}

.page-contact .contact-fact__value .num {
  font-size: 20px;
  font-weight: 700;
  color: var(--amber-500);
  margin-right: 4px;
}

.page-contact .contact-hero__fig {
  position: relative;
  margin: 0;
  padding: 0 0 16px 16px;
}

.page-contact .contact-hero__fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 12 / 7;
  object-fit: cover;
  border: var(--contact-line);
}

.page-contact .contact-hero__fig::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  width: 46%;
  height: 42%;
  border-right: 3px solid var(--cyan-400);
  border-bottom: 3px solid var(--cyan-400);
  pointer-events: none;
}

/* ---------- 主体双栏 ---------- */

.page-contact .contact-body {
  padding: 0 0 96px;
}

.page-contact .contact-body__inner {
  display: grid;
  grid-template-columns: 1fr;
  gap: 56px;
}

.page-contact .contact-stream {
  min-width: 0;
}

/* ---------- 章节块 ---------- */

.page-contact .contact-block {
  border-top: var(--contact-line);
  padding: 40px 0 8px;
}

.page-contact .contact-block:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .contact-block + .contact-block {
  margin-top: 32px;
}

.page-contact .contact-block__head {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 20px;
}

.page-contact .contact-block__idx {
  flex: none;
  font-size: 12px;
  line-height: 1;
  letter-spacing: .1em;
  color: var(--cyan-400);
  border: 1px solid rgba(59, 240, 206, .42);
  padding: 6px 8px;
  margin-top: 4px;
}

.page-contact .contact-block__title {
  font-size: clamp(22px, 4.4vw, 32px);
  line-height: 1.24;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0 0 8px;
}

.page-contact .contact-block__sub {
  font-size: 14px;
  line-height: 1.7;
  color: var(--slate-600);
  max-width: 32em;
}

.page-contact .contact-block__foot {
  margin-top: 26px;
  font-size: 14px;
  line-height: 1.75;
  color: rgba(245, 248, 244, .72);
  max-width: 34em;
}

.page-contact .contact-block__foot a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 206, .4);
  transition: border-color var(--dur) var(--ease);
}

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

/* ---------- 合作方向 ---------- */

.page-contact .direction-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: var(--contact-line);
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(220, 229, 223, .14);
}

.page-contact .direction-item {
  position: relative;
  background: var(--pitch-950);
  padding: 24px 24px 26px;
  transition: background var(--dur) var(--ease);
}

.page-contact .direction-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: transparent;
  transition: background var(--dur) var(--ease);
}

.page-contact .direction-item:hover::before,
.page-contact .direction-item:focus-within::before {
  background: var(--amber-500);
}

.page-contact .direction-item:hover,
.page-contact .direction-item:focus-within {
  background: var(--pitch-800);
}

.page-contact .direction-item__name {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  letter-spacing: -.005em;
}

.page-contact .direction-item__desc {
  font-size: 14.5px;
  line-height: 1.75;
  color: rgba(245, 248, 244, .78);
  max-width: 40em;
}

.page-contact .direction-item__fit {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate-600);
}

/* ---------- 准备清单（可展开） ---------- */

.page-contact .prep {
  border: var(--contact-line);
  border-left: 3px solid transparent;
  margin-top: 10px;
  transition: border-left-color var(--dur) var(--ease), background var(--dur) var(--ease);
}

.page-contact .prep[open] {
  border-left-color: var(--cyan-400);
  background: rgba(10, 46, 39, .55);
}

.page-contact .prep__head {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -.005em;
  transition: color var(--dur) var(--ease);
}

.page-contact .prep__head::-webkit-details-marker {
  display: none;
}

.page-contact .prep__head::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1;
  color: var(--cyan-400);
  flex: none;
}

.page-contact .prep[open] .prep__head::after {
  content: "\2212";
}

.page-contact .prep__head:hover {
  color: var(--cyan-400);
}

.page-contact .prep__body {
  padding: 0 22px 22px;
}

.page-contact .prep__body p {
  font-size: 14.5px;
  line-height: 1.8;
  color: rgba(245, 248, 244, .76);
  max-width: 40em;
}

/* ---------- 回复节奏 ---------- */

.page-contact .reply-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: rgba(220, 229, 223, .14);
  border: var(--contact-line);
}

.page-contact .reply-cell {
  background: var(--pitch-800);
  padding: 24px 22px;
}

.page-contact .reply-cell__num {
  font-size: 26px;
  font-weight: 700;
  color: var(--amber-500);
  letter-spacing: -.01em;
  margin-bottom: 10px;
}

.page-contact .reply-cell__label {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 8px;
}

.page-contact .reply-cell__note {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(245, 248, 244, .66);
}

/* ---------- 纠错流程 ---------- */

.page-contact .track {
  list-style: none;
  margin: 8px 0 0;
  padding: 0 0 0 28px;
  position: relative;
}

.page-contact .track::before {
  content: "";
  position: absolute;
  left: 3px;
  top: 12px;
  bottom: 12px;
  width: 1px;
  background: rgba(220, 229, 223, .24);
}

.page-contact .track__step {
  position: relative;
  padding-bottom: 26px;
}

.page-contact .track__step:last-child {
  padding-bottom: 0;
}

.page-contact .track__step::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 6px;
  width: 7px;
  height: 7px;
  background: var(--cyan-400);
  box-shadow: 0 0 0 3px rgba(59, 240, 206, .16);
}

.page-contact .track__title {
  font-size: 16px;
  font-weight: 700;
  margin: 0 0 8px;
}

.page-contact .track__text {
  font-size: 14.5px;
  line-height: 1.78;
  color: rgba(245, 248, 244, .76);
  max-width: 40em;
}

.page-contact .track-fig {
  margin: 32px 0 0;
}

.page-contact .track-fig img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 45 / 26;
  object-fit: cover;
  border: var(--contact-line);
}

.page-contact .track-fig__cap {
  margin-top: 12px;
  font-size: 12.5px;
  letter-spacing: .04em;
  color: var(--slate-600);
}

/* ---------- 右侧联系方式卡 ---------- */

.page-contact .contact-rail {
  min-width: 0;
}

.page-contact .contact-card {
  position: relative;
  background: var(--pitch-800);
  border: var(--contact-line-strong);
  padding: 30px 26px 26px;
}

.page-contact .contact-card::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 3px;
  height: 72px;
  background: var(--cyan-400);
}

.page-contact .contact-card__eyebrow {
  margin-bottom: 10px;
}

.page-contact .contact-card__title {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: -.01em;
  margin: 0 0 22px;
}

.page-contact .contact-card__list {
  margin: 0;
  padding: 0;
}

.page-contact .contact-card__row {
  padding: 18px 0;
  border-top: var(--contact-line);
}

.page-contact .contact-card__row:first-child {
  border-top: 0;
  padding-top: 0;
}

.page-contact .contact-card__key {
  font-size: 12px;
  letter-spacing: .1em;
  color: var(--cyan-200);
  margin-bottom: 8px;
}

.page-contact .contact-card__val {
  margin: 0;
  font-size: 15.5px;
  line-height: 1.65;
  font-weight: 600;
  color: var(--paper-50);
  word-break: break-word;
}

.page-contact .contact-card__val--mono {
  font-family: var(--font-mono);
  font-size: 16px;
  letter-spacing: -.01em;
}

.page-contact .contact-card__val a {
  color: var(--paper-50);
  text-decoration: none;
  border-bottom: 1px solid rgba(245, 248, 244, .3);
  transition: color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}

.page-contact .contact-card__val a:hover,
.page-contact .contact-card__val a:focus-visible {
  color: var(--cyan-400);
  border-bottom-color: var(--cyan-400);
}

.page-contact .contact-card__hint {
  margin-top: 8px;
  font-size: 12.5px;
  line-height: 1.68;
  color: rgba(245, 248, 244, .6);
}

.page-contact .contact-card__foot {
  margin-top: 22px;
  padding-top: 18px;
  border-top: var(--contact-line);
}

.page-contact .contact-card__meta {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: .04em;
  color: var(--slate-600);
  line-height: 1.9;
}

.page-contact .contact-card__meta .num {
  color: var(--amber-500);
}

.page-contact .contact-rail__aside {
  margin-top: 20px;
  padding: 20px 22px;
  border: var(--contact-line);
  font-size: 13.5px;
  line-height: 1.8;
  color: rgba(245, 248, 244, .68);
}

.page-contact .contact-rail__aside a {
  color: var(--cyan-400);
  text-decoration: none;
  border-bottom: 1px solid rgba(59, 240, 206, .38);
  transition: border-color var(--dur) var(--ease);
}

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

/* ---------- 桌面端 ---------- */

@media (min-width: 720px) {
  .page-contact .contact-hero__facts {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
  }

  .page-contact .reply-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

@media (min-width: 1040px) {
  .page-contact .contact-hero {
    padding: 56px 0 100px;
  }

  .page-contact .contact-hero__inner {
    grid-template-columns: minmax(0, 1.08fr) minmax(0, .92fr);
    column-gap: 64px;
  }

  .page-contact .contact-body__inner {
    grid-template-columns: minmax(0, 1fr) var(--contact-rail-w);
    column-gap: 72px;
    align-items: start;
  }

  .page-contact .contact-stream {
    grid-column: 1;
    grid-row: 1;
  }

  .page-contact .contact-rail {
    grid-column: 2;
    grid-row: 1;
    position: sticky;
    top: 88px;
  }
}

@media (min-width: 1280px) {
  .page-contact .direction-item {
    padding: 28px 28px 30px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .direction-item,
  .page-contact .direction-item::before,
  .page-contact .prep,
  .page-contact .contact-card__val a,
  .page-contact .contact-crumbs a {
    transition: none;
  }
}
</main>