.page-contact {
  --co-tile-pad: 22px;
  --co-gap: 14px;
  display: block;
  background: var(--bg);
  color: var(--ink);
  overflow-x: clip;
}

/* ---------- 面包屑 ---------- */
.page-contact .breadcrumbs {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin: 0 0 22px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  padding: 26px 0 0;
}

.page-contact .co-hero__top {
  display: grid;
  gap: 28px;
}

.page-contact .co-hero__kicker {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .co-hero__title {
  margin: 12px 0 0;
  font-family: var(--font-display);
  font-size: 29px;
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.02em;
  color: var(--ink);
}

.page-contact .co-hero__lead {
  margin: 16px 0 0;
  max-width: 62ch;
  font-size: 15.5px;
  line-height: 1.78;
  color: var(--ink-mute);
}

.page-contact .co-hero__facts {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.page-contact .co-hero__fact dt {
  margin: 0 0 8px;
  font-size: 11.5px;
  line-height: 1.45;
  letter-spacing: .05em;
  color: var(--ink-mute);
}

.page-contact .co-hero__fact dd {
  margin: 0;
  font-size: 21px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .co-hero__media {
  margin: 28px 0 0;
}

.page-contact .co-hero__media .media__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
  aspect-ratio: 1400 / 800;
}

.page-contact .co-hero__media .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-contact .media__scrim {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(6, 11, 20, 0) 42%, rgba(6, 11, 20, .78) 100%);
  pointer-events: none;
}

.page-contact .media__cap {
  display: block;
  margin-top: 10px;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-mute);
}

/* ---------- 四类合作方向 ---------- */
.page-contact .co-directions {
  margin-top: 60px;
}

.page-contact .co-directions__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.page-contact .co-directions__lead {
  margin: 12px 0 0;
  max-width: 56ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .co-collage {
  display: grid;
  gap: var(--co-gap);
  margin-top: 26px;
}

.page-contact .co-tile {
  position: relative;
  padding: var(--co-tile-pad);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
  transition: transform 220ms var(--ease), border-color 220ms var(--ease), background 220ms var(--ease);
}

.page-contact .co-tile::before {
  content: "";
  position: absolute;
  left: -1px;
  top: 18px;
  bottom: 18px;
  width: 3px;
  border-radius: 3px;
  background: var(--cyan);
}

.page-contact .co-tile--b::before { background: var(--orange); }
.page-contact .co-tile--c::before { background: var(--amber); }
.page-contact .co-tile--d::before { background: var(--cyan-soft); }

.page-contact .co-tile:hover,
.page-contact .co-tile:focus-within {
  transform: translateY(-6px);
  border-color: rgba(20, 224, 198, .55);
  background: #0D1826;
}

.page-contact .co-tile__tag {
  display: inline-block;
  padding: 5px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--cyan);
  background: var(--cyan-dim);
}

.page-contact .co-tile--b .co-tile__tag {
  color: var(--orange);
  background: rgba(255, 106, 43, .12);
  border-color: rgba(255, 106, 43, .3);
}

.page-contact .co-tile--c .co-tile__tag {
  color: var(--amber);
  background: rgba(255, 194, 75, .1);
  border-color: rgba(255, 194, 75, .28);
}

.page-contact .co-tile--d .co-tile__tag {
  color: var(--cyan-soft);
}

.page-contact .co-tile__title {
  margin: 14px 0 8px;
  font-family: var(--font-display);
  font-size: 19.5px;
  font-weight: 600;
  line-height: 1.38;
  letter-spacing: -0.01em;
}

.page-contact .co-tile__fit {
  margin: 0 0 16px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
  transition: color 220ms var(--ease);
}

.page-contact .co-tile:hover .co-tile__fit {
  color: var(--cyan-soft);
}

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

.page-contact .co-tile__list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.72;
  color: #C3CEDC;
}

.page-contact .co-tile__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .78em;
  width: 7px;
  height: 1px;
  background: var(--cyan);
  opacity: .6;
}

.page-contact .co-tile__list .mono {
  color: var(--cyan);
  font-size: 13px;
}

/* ---------- 流程 + 联系卡 ---------- */
.page-contact .co-layout {
  display: grid;
  gap: 34px;
  margin-top: 72px;
}

.page-contact .co-flow__index {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .co-flow__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.page-contact .co-flow__lead {
  margin: 12px 0 0;
  max-width: 54ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .co-flow__media {
  margin: 24px 0 0;
}

.page-contact .co-flow__media .media__frame {
  position: relative;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
  aspect-ratio: 1200 / 800;
}

.page-contact .co-flow__media .media__img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
  max-width: 100%;
}

.page-contact .co-steps {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .co-step {
  position: relative;
  padding-left: 24px;
}

.page-contact .co-step::before {
  content: "";
  position: absolute;
  left: 6px;
  top: 40px;
  bottom: -14px;
  width: 1px;
  background: linear-gradient(180deg, rgba(20, 224, 198, .7) 0%, rgba(20, 224, 198, 0) 100%);
}

.page-contact .co-step:last-child::before { display: none; }

.page-contact .co-step::after {
  content: "";
  position: absolute;
  left: 2px;
  top: 22px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  border: 1px solid var(--cyan);
  background: var(--bg);
}

.page-contact .co-step__box {
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--bg-panel);
  transition: border-color 200ms var(--ease);
}

.page-contact .co-step__box[open] {
  border-color: rgba(20, 224, 198, .5);
}

.page-contact .co-step__sum {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  min-height: 44px;
  padding: 17px 18px;
  cursor: pointer;
  list-style: none;
}

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

.page-contact .co-step__sum::after {
  content: "+";
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 16px;
  line-height: 1;
  color: var(--cyan);
}

.page-contact .co-step__box[open] .co-step__sum::after { content: "\2212"; }

.page-contact .co-step__num {
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--cyan);
}

.page-contact .co-step__name {
  font-size: 16.5px;
  font-weight: 600;
  color: var(--ink);
}

.page-contact .co-step__hint {
  flex: 1 0 100%;
  font-size: 12.5px;
  line-height: 1.6;
  color: var(--ink-mute);
}

.page-contact .co-step__body {
  padding: 0 18px 18px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .co-step__body p {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .co-step__list {
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 9px;
}

.page-contact .co-step__list li {
  position: relative;
  padding-left: 18px;
  font-size: 13.5px;
  line-height: 1.7;
  color: #C3CEDC;
}

.page-contact .co-step__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .76em;
  width: 8px;
  height: 1px;
  background: var(--cyan-soft);
  opacity: .75;
}

/* ---------- 联系卡 ---------- */
.page-contact .co-contact {
  padding: 24px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(158deg, rgba(20, 224, 198, .12) 0%, rgba(11, 20, 32, .96) 44%, var(--bg-panel) 100%);
}

.page-contact .co-contact__title {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.page-contact .co-contact__note {
  margin: 0 0 18px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-mute);
}

.page-contact .co-contact__list {
  margin: 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 14px;
}

.page-contact .co-contact__item {
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

.page-contact .co-contact__label {
  display: block;
  margin-bottom: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-mute);
}

.page-contact .co-contact__value {
  display: block;
  font-size: 14.5px;
  line-height: 1.62;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.page-contact .co-contact__value.mono {
  color: var(--cyan);
  font-size: 14px;
}

.page-contact .co-contact__tip {
  margin: 18px 0 0;
  padding: 12px 14px;
  border-left: 2px solid var(--orange);
  border-radius: 0 8px 8px 0;
  background: rgba(255, 106, 43, .08);
  font-size: 12.5px;
  line-height: 1.7;
  color: #D4DEEE;
}

.page-contact .co-contact__more {
  display: grid;
  gap: 8px;
  margin-top: 18px;
}

.page-contact .co-contact__link {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font-size: 13.5px;
  color: var(--ink);
  text-decoration: none;
  background: rgba(6, 11, 20, .5);
  transition: border-color 180ms var(--ease), color 180ms var(--ease), background 180ms var(--ease);
}

.page-contact .co-contact__link::after {
  content: "\2192";
  margin-left: auto;
  font-family: var(--font-mono);
  color: var(--cyan);
  opacity: .7;
}

.page-contact .co-contact__link:hover,
.page-contact .co-contact__link:focus-visible {
  border-color: var(--cyan);
  color: var(--cyan-soft);
  background: rgba(20, 224, 198, .08);
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq {
  margin-top: 76px;
}

.page-contact .co-faq__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 25px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.02em;
}

.page-contact .co-faq__lead {
  margin: 12px 0 0;
  max-width: 52ch;
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--ink-mute);
}

.page-contact .co-faq__list {
  margin-top: 26px;
  border-top: 1px solid var(--line);
}

.page-contact .co-faq__item {
  border-bottom: 1px solid var(--line);
}

.page-contact .co-faq__sum {
  position: relative;
  display: flex;
  align-items: center;
  min-height: 56px;
  padding: 14px 40px 14px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15.5px;
  font-weight: 500;
  line-height: 1.55;
  color: var(--ink);
  transition: color 180ms var(--ease);
}

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

.page-contact .co-faq__sum::after {
  content: "+";
  position: absolute;
  right: 6px;
  font-family: var(--font-mono);
  font-size: 17px;
  color: var(--cyan);
}

.page-contact .co-faq__item[open] .co-faq__sum::after { content: "\2212"; }

.page-contact .co-faq__sum:hover,
.page-contact .co-faq__sum:focus-visible {
  color: var(--cyan);
}

.page-contact .co-faq__body {
  padding: 0 0 20px;
}

.page-contact .co-faq__body p {
  margin: 0;
  max-width: 68ch;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-mute);
}

.page-contact .co-inline-link {
  color: var(--cyan);
  text-decoration: none;
  border-bottom: 1px solid rgba(20, 224, 198, .5);
  transition: border-color 180ms var(--ease);
}

.page-contact .co-inline-link:hover,
.page-contact .co-inline-link:focus-visible {
  border-color: var(--cyan);
}

/* ---------- 延伸入口 ---------- */
.page-contact .co-next {
  margin-top: 76px;
  padding-top: 34px;
  border-top: 1px solid var(--line);
}

.page-contact .co-next__title {
  margin: 0;
  font-family: var(--font-display);
  font-size: 21px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: -0.01em;
}

.page-contact .co-next__grid {
  display: grid;
  gap: 12px;
  margin-top: 22px;
}

.page-contact .co-next__card {
  display: grid;
  gap: 8px;
  min-height: 44px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
  text-decoration: none;
  transition: transform 220ms var(--ease), border-color 220ms var(--ease);
}

.page-contact .co-next__card:hover,
.page-contact .co-next__card:focus-visible {
  transform: translateY(-4px);
  border-color: rgba(20, 224, 198, .55);
}

.page-contact .co-next__label {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .co-next__text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-mute);
}

/* ---------- 断点 ---------- */
@media (min-width: 640px) {
  .page-contact .co-hero__title { font-size: 34px; }
  .page-contact .co-hero__lead { font-size: 16px; }
  .page-contact .co-hero__fact dd { font-size: 26px; }

  .page-contact .co-collage {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .page-contact .co-tile--b,
  .page-contact .co-tile--d { margin-top: 28px; }

  .page-contact .co-tile { --co-tile-pad: 24px; }

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

@media (min-width: 900px) {
  .page-contact .co-hero { padding-top: 34px; }
  .page-contact .co-hero__title { font-size: 42px; }
  .page-contact .co-directions__title,
  .page-contact .co-flow__title,
  .page-contact .co-faq__title { font-size: 32px; }

  .page-contact .co-hero__top {
    grid-template-columns: minmax(0, 1fr) 300px;
    align-items: end;
    gap: 44px;
  }

  .page-contact .co-hero__facts {
    grid-template-columns: 1fr;
    gap: 16px;
    padding-top: 0;
    border-top: 0;
    border-left: 1px solid var(--line);
    padding-left: 24px;
  }

  .page-contact .co-collage {
    grid-template-columns: 1.24fr 1fr 1.1fr 1fr;
    gap: 16px;
    align-items: start;
  }

  .page-contact .co-tile--b { margin-top: 34px; }
  .page-contact .co-tile--c { margin-top: 12px; }
  .page-contact .co-tile--d { margin-top: 46px; }

  .page-contact .co-layout {
    grid-template-columns: minmax(0, 1fr) 336px;
    gap: 48px;
    align-items: start;
  }

  .page-contact .co-contact {
    position: sticky;
    top: 96px;
  }

  .page-contact .co-faq__list { margin-top: 30px; }
}

@media (min-width: 1200px) {
  .page-contact .co-hero__title { font-size: 50px; }
  .page-contact .co-hero__media { margin-top: 34px; }
  .page-contact .co-tile { --co-tile-pad: 26px; }
}

@media (prefers-reduced-motion: reduce) {
  .page-contact .co-tile,
  .page-contact .co-next__card,
  .page-contact .co-contact__link {
    transition: none;
  }

  .page-contact .co-tile:hover,
  .page-contact .co-tile:focus-within,
  .page-contact .co-next__card:hover,
  .page-contact .co-next__card:focus-visible {
    transform: none;
  }
}
</main>