.page-contact {
  --co-gap: clamp(18px, 3vw, 32px);
  --co-pad: clamp(18px, 3.2vw, 30px);
  position: relative;
  overflow-x: clip;
}

.page-contact .mono {
  font-family: var(--font-mono);
}

/* ---------- 首屏 ---------- */
.page-contact .co-hero {
  position: relative;
  padding: clamp(24px, 5vw, 48px) 0 clamp(36px, 6vw, 72px);
  isolation: isolate;
}

.page-contact .co-hero::before {
  content: "";
  position: absolute;
  inset: -10% -20% auto auto;
  width: min(620px, 78vw);
  height: 620px;
  background:
    radial-gradient(circle at 62% 38%, rgba(53, 240, 208, 0.16), transparent 62%),
    radial-gradient(circle at 30% 72%, rgba(255, 122, 47, 0.13), transparent 66%);
  filter: blur(6px);
  z-index: -1;
  pointer-events: none;
}

.page-contact .co-hero__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(30px, 5vw, 56px);
  margin-top: clamp(22px, 4vw, 40px);
}

.page-contact .co-kicker {
  margin: 0 0 14px;
  font-size: 12px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .co-hero__title {
  margin: 0 0 20px;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(38px, 6.6vw, 68px);
  line-height: 1.03;
  letter-spacing: -0.02em;
  color: var(--mist);
  max-width: 15ch;
}

.page-contact .co-hero__lede .lede {
  max-width: 46ch;
  color: var(--mist);
  opacity: 0.9;
  margin: 0 0 26px;
}

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

.page-contact .co-hero__side {
  border: 1px solid var(--line);
  background: var(--ink-700);
  padding: var(--co-pad);
  position: relative;
}

.page-contact .co-hero__side::after {
  content: "";
  position: absolute;
  top: -1px;
  left: -1px;
  width: 56px;
  height: 2px;
  background: var(--cyan);
}

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

.page-contact .co-stat-list li {
  display: grid;
  gap: 6px;
  padding: 16px 0;
  border-top: 1px solid var(--line);
}

.page-contact .co-stat-list li:first-child {
  border-top: 0;
  padding-top: 4px;
}

.page-contact .co-stat-num {
  font-size: 34px;
  line-height: 1;
  font-weight: 700;
  color: var(--cyan);
  letter-spacing: -0.02em;
}

.page-contact .co-stat-num em {
  font-style: normal;
  font-size: 15px;
  margin-left: 4px;
  color: var(--mist);
  letter-spacing: 0.04em;
}

.page-contact .co-stat-plus {
  color: var(--amber);
}

.page-contact .co-stat-label {
  font-size: 14px;
  line-height: 1.6;
  color: var(--stone);
}

/* ---------- 通栏图 ---------- */
.page-contact .co-banner {
  margin: 0;
  padding: 0;
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .co-banner img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: clamp(200px, 42vw, 460px);
  object-fit: cover;
  object-position: center;
  filter: saturate(0.85) contrast(1.05);
}

.page-contact .co-banner .media-caption {
  position: absolute;
  left: var(--gutter);
  bottom: 14px;
  color: var(--cyan);
  font-size: 11px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ---------- 章节头 ---------- */
.page-contact .co-head {
  display: grid;
  gap: 10px;
  margin-bottom: clamp(24px, 4vw, 40px);
  max-width: 62ch;
}

.page-contact .co-head h2,
.page-contact .co-contact__main h2,
.page-contact .co-scope h2,
.page-contact .co-more h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 900;
  font-size: clamp(26px, 3.4vw, 42px);
  line-height: 1.12;
  letter-spacing: -0.02em;
  color: var(--mist);
}

.page-contact .co-head .muted,
.page-contact .co-contact__main .muted,
.page-contact .co-scope p {
  margin: 0;
  color: var(--stone);
  max-width: 60ch;
}

.page-contact .index-num {
  display: inline-block;
  color: var(--cyan);
  font-size: 13px;
  letter-spacing: 0.16em;
}

/* ---------- 合作方向切换器 ---------- */
.page-contact .co-switch {
  display: grid;
  grid-template-columns: 1fr;
  border: 1px solid var(--line);
}

.page-contact .co-switch__rail {
  display: flex;
  gap: 0;
  overflow-x: auto;
  border-bottom: 1px solid var(--line);
  scrollbar-width: thin;
}

.page-contact .co-dir-btn {
  flex: 0 0 auto;
  min-width: 172px;
  display: grid;
  gap: 6px;
  align-content: start;
  text-align: left;
  padding: 18px 20px;
  background: transparent;
  border: 0;
  border-right: 1px solid var(--line);
  color: var(--stone);
  font-family: var(--font-body);
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  position: relative;
  transition: background-color 220ms var(--ease), color 220ms var(--ease);
}

.page-contact .co-dir-btn:last-child {
  border-right: 0;
}

.page-contact .co-dir-btn__num {
  font-size: 12px;
  letter-spacing: 0.14em;
  color: var(--stone);
  transition: color 220ms var(--ease);
}

.page-contact .co-dir-btn__label {
  color: var(--mist);
  line-height: 1.25;
}

.page-contact .co-dir-btn__hint {
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--line);
  text-transform: uppercase;
}

.page-contact .co-dir-btn:hover {
  background: rgba(53, 240, 208, 0.06);
}

.page-contact .co-dir-btn.is-active,
.page-contact .co-dir-btn[aria-pressed="true"] {
  background: rgba(53, 240, 208, 0.09);
  box-shadow: inset 0 -2px 0 0 var(--cyan);
}

.page-contact .co-dir-btn.is-active .co-dir-btn__num,
.page-contact .co-dir-btn[aria-pressed="true"] .co-dir-btn__num {
  color: var(--cyan);
}

.page-contact .co-switch__panels {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
}

.page-contact .co-panel {
  background: var(--ink-900);
  padding: clamp(20px, 3vw, 32px);
  display: grid;
  gap: 14px;
  align-content: start;
}

.page-contact .co-panel h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 21px;
  line-height: 1.3;
  color: var(--mist);
}

.page-contact .co-panel p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--stone);
  max-width: 56ch;
}

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

.page-contact .co-panel__list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--mist);
  opacity: 0.88;
}

.page-contact .co-panel__list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 8px;
  height: 2px;
  background: var(--cyan);
}

.page-contact .co-panel__fit {
  margin: 0;
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--moss);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

/* ---------- 流程带 ---------- */
.page-contact .co-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
  counter-reset: coflow;
}

.page-contact .co-step {
  background: var(--ink-900);
  padding: clamp(20px, 3vw, 30px);
  display: grid;
  gap: 10px;
  align-content: start;
  position: relative;
  transition: transform 260ms var(--ease), background-color 260ms var(--ease);
}

.page-contact .co-step:hover {
  background: var(--ink-700);
  transform: translateY(-3px);
}

.page-contact .co-step__num {
  font-size: 30px;
  line-height: 1;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1px var(--cyan);
  letter-spacing: 0.02em;
}

.page-contact .co-step h3 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 19px;
  line-height: 1.3;
  color: var(--mist);
}

.page-contact .co-step p {
  margin: 0;
  font-size: 14px;
  line-height: 1.72;
  color: var(--stone);
}

.page-contact .co-step__out {
  font-size: 11px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--amber);
  border-top: 1px dashed var(--line);
  padding-top: 12px;
}

/* ---------- 联系通道 ---------- */
.page-contact .co-contact {
  border-top: 1px solid var(--line);
}

.page-contact .co-contact__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: clamp(28px, 5vw, 48px);
}

.page-contact .co-contact__main {
  display: grid;
  gap: 16px;
  align-content: start;
}

.page-contact .co-reach {
  list-style: none;
  margin: 8px 0 0;
  padding: 0;
  display: grid;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .co-reach__item {
  background: var(--ink-700);
  padding: 18px 20px;
  display: grid;
  gap: 6px;
}

.page-contact .co-reach__key {
  font-size: 11px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--cyan);
}

.page-contact .co-reach__val {
  font-size: 17px;
  line-height: 1.45;
  color: var(--mist);
  word-break: break-word;
}

.page-contact .co-reach__note {
  font-size: 13px;
  line-height: 1.65;
  color: var(--stone);
}

.page-contact .co-contact__main .btn {
  justify-self: start;
  margin-top: 4px;
}

.page-contact .co-contact__fig {
  margin: 0;
  position: relative;
  border: 1px solid var(--line);
  overflow: hidden;
}

.page-contact .co-contact__fig img {
  display: block;
  width: 100%;
  max-width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  object-fit: cover;
  filter: saturate(0.8) contrast(1.06);
}

.page-contact .co-contact__fig .media-caption {
  position: absolute;
  left: 14px;
  bottom: 12px;
  color: var(--cyan);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

/* ---------- 受理范围 ---------- */
.page-contact .co-scope {
  border-top: 1px solid var(--line);
}

.page-contact .co-scope .index-num {
  margin-bottom: 12px;
}

.page-contact .co-scope h2 {
  margin-bottom: 20px;
}

.page-contact .co-scope p + p {
  margin-top: 16px;
}

/* ---------- 常见问题 ---------- */
.page-contact .co-faq__list {
  display: grid;
  gap: 1px;
  background: var(--line);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.page-contact .co-faq__item {
  background: var(--ink-900);
}

.page-contact .co-faq__item summary {
  list-style: none;
  cursor: pointer;
  display: flex;
  align-items: baseline;
  gap: 16px;
  padding: 18px 4px;
  color: var(--mist);
  transition: color 200ms var(--ease);
}

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

.page-contact .co-faq__item summary .mono {
  flex: 0 0 auto;
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--cyan);
}

.page-contact .co-faq__q {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 17px;
  line-height: 1.45;
}

.page-contact .co-faq__item summary:hover {
  color: var(--cyan);
}

.page-contact .co-faq__item[open] summary {
  color: var(--cyan);
}

.page-contact .co-faq__a {
  padding: 0 4px 20px 46px;
}

.page-contact .co-faq__a p {
  margin: 0;
  font-size: 15px;
  line-height: 1.78;
  color: var(--stone);
  max-width: 64ch;
}

/* ---------- 其他入口 ---------- */
.page-contact .co-more {
  border-top: 1px solid var(--line);
}

.page-contact .co-more h2 {
  margin: 12px 0 clamp(20px, 3vw, 30px);
}

.page-contact .co-more__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1px;
  background: var(--line);
  border: 1px solid var(--line);
}

.page-contact .co-more__card {
  background: var(--ink-900);
  padding: 22px 20px;
  display: grid;
  gap: 8px;
  text-decoration: none;
  transition: background-color 220ms var(--ease), transform 220ms var(--ease);
}

.page-contact .co-more__card:hover {
  background: var(--ink-700);
  transform: translateY(-2px);
}

.page-contact .co-more__idx {
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--stone);
  text-transform: uppercase;
}

.page-contact .co-more__title {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 18px;
  line-height: 1.3;
  color: var(--mist);
}

.page-contact .co-more__card:hover .co-more__title {
  color: var(--cyan);
}

.page-contact .co-more__desc {
  font-size: 13.5px;
  line-height: 1.68;
  color: var(--stone);
}

/* ---------- 收尾橙线 ---------- */
.page-contact .co-closer {
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg, var(--amber), rgba(255, 122, 47, 0));
  margin-top: clamp(40px, 6vw, 72px);
}

/* ---------- 焦点态 ---------- */
.page-contact a:focus-visible,
.page-contact button:focus-visible,
.page-contact summary:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 2px;
}

/* ---------- 平板及以上 ---------- */
@media (min-width: 720px) {
  .page-contact .co-switch__panels {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

/* ---------- 桌面 ---------- */
@media (min-width: 960px) {
  .page-contact .co-hero__grid {
    grid-template-columns: minmax(0, 62fr) minmax(0, 38fr);
    align-items: start;
  }

  .page-contact .co-switch {
    grid-template-columns: minmax(0, 34fr) minmax(0, 66fr);
  }

  .page-contact .co-switch__rail {
    flex-direction: column;
    overflow: visible;
    border-bottom: 0;
    border-right: 1px solid var(--line);
  }

  .page-contact .co-dir-btn {
    min-width: 0;
    width: 100%;
    flex: 1 0 auto;
    padding: 22px 24px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    font-size: 18px;
  }

  .page-contact .co-dir-btn:last-child {
    border-bottom: 0;
  }

  .page-contact .co-dir-btn.is-active,
  .page-contact .co-dir-btn[aria-pressed="true"] {
    box-shadow: inset 3px 0 0 0 var(--cyan);
  }

  .page-contact .co-steps {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-contact__grid {
    grid-template-columns: minmax(0, 58fr) minmax(0, 42fr);
    align-items: start;
  }

  .page-contact .co-more__grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }

  .page-contact .co-panel {
    padding: clamp(24px, 2.4vw, 34px);
  }
}

/* ---------- 动效降级 ---------- */
@media (prefers-reduced-motion: reduce) {
  .page-contact .co-step,
  .page-contact .co-more__card,
  .page-contact .co-dir-btn {
    transition: none;
  }

  .page-contact .co-step:hover,
  .page-contact .co-more__card:hover {
    transform: none;
  }
}
</main>